Патент USA US2576897код для вставки
Nov. 27, 195] 2,576,893 J. w. STEWART, JR GAUGING AND SAMPLING WELL FOR VESSELS Filed June 26, 1950 .1. . 2. I5 O - , ‘ , ZSnnentor Mamas W J/ewar?/r [4 (ittomegs Patented Nov. 27, 1951 2,576,893 UNITED STATES PATENT OFFICE 2,576,893 GAUGING AND SAMPLING WELL FOR VESSELS James W. Stewart, Jr., Dinuba, Calif‘. Application June 26,‘ 1950, Serial No. 170,280 8 Claims. (01. 220-45) 2 This invention relates to a gauging and thief which is flowed into the tank from the gather; ing, lines leading ‘from one or more producing ing well for liquid containing vessels, for example, stock storage and similar tanks containing liq wells. uid hydro-carbons that are subject to vaporiza tion. Such tanks include an annular wall 3, a closed bottom ii, and a top 5, which is provided with a gauging and thie?ng hatch B. The hatch ‘In vessels of, this character vapors accumulate within a vapor space in the top of the tank where they remain under slight pressure until a fall in temperature causes them to condense and fall E3 includes a collar "i that encircles an opening 8 in the top‘ 5 and is provided with an annular flange 9 for-seating a cover Hi. The cover It! is'connected with the collar 1 by a hinge 7H and back into the liquid. Since‘ these vapors are val- " ‘ is retained in closed position on the ?ange 9_ by uable, it is desirable to prevent their escape when a latch iii. A suitable gasket 53 is provided with gauging depth of the liquid and’ taking samples in an annular groove 14 in the under side of the thereof. These operations are eiiected through cover as shown in Figs. 2 and 3. a’ thief hatch that is normally closed, but which _When the liquid hydro-carbon contained in a tank is to be discharged into a purchaser's pipe line, it is necessary‘ for the “gauger” to open the hatch and gauge the depth of the liquid hydro carbon so that the volume of oil in the tank may must be opened for gauging and thie?ng puré poses with the result that the accumulated val pors escape through the‘ hatch.‘ The vapors are not only'lost', but being highly in?ammable, seri ous ?res and explosions may result. I v ‘ ‘It is therefore a principal object of the pres 2O be “calculated. It is also necessary to obtain samples of the liquid at different elevations with ent ‘invention to provide such tanks or vessels in the tank to determine the quality of the liquid. with a gauging and thie?ng well that is normally in connection with the vapor andrliquid- contain ing portions of the vessel when" the hatch is closed‘ to permit ?lling and equalization of pressures, Prior to the present invention, opening of the hatch resulted in loss of the vapors contained in the vapor space l5 provided in the upper por and, which, is provided with means for closing viding the vessel with a gauging and thie?ng well Hi which comprises a tubular pipe or duct I‘! said’ connections when the hatch is opened there by preventing escape of the vapors. , Other objects of the invention are to provide a gauging and thie?ng well that is of simple con- > struction, positive in operation, and which per mits accurate gauging and sampling of the liquid. -In accomplishing these and other objects of the invention as is hereinafter pointed out, I have provided improved ‘structure, the preferred . form of which is illustrated in the accompanying drawing wherein: tion‘ of the tank. This is accomplished by pro having its upper end mounted within the open ing 8 and its lower end depending to near the bottom ll. The upper end of the pipe is connect ed with the roof 5 and/or hatch collar ‘I so as to form a seal with respect to the vapor space it while the lower end of the pipe is supported from’ the side wall 3 by a bracket arm l8. ‘ The bracket arm I8 is connected with a coupling I9 that may be threaded or other wise attached to, the lower‘end of the pipe as indicated _at,2? Fig. 1 is a vertical section through one side of a vessel or tank equipped with a gauging and and which preferably carries a closure cap 2! so as to form a bottom for the well. In the illus thie?ng well embodying the features of the pres~ trated instance, the closure cap is shown as con ent invention, the hatch being ‘closed ‘and the nected with the‘ coupling by a threaded connec valve collars in position for opening the inlet ports to the Well. Fig. 2 is an enlarged vertical section through the gauging and thie?ng well, the hatch cover being shown in an open position and the valve tion 22 as clearly shown in Fig. 2. collars in closing relation with the inlet ports. Fig. 3 is a fragmentary section through the gauging and thie?ng hatch showing the lugs thereon depressing the valve collar assembly from covering relation with the inlet ports. Fig. 4 is a cross section on the line 4-4 of Fig. 2'.‘ Referring more in detail to the drawings: vl designates a vessel such as a stock tank for‘ containing liquid hydro-carbon’ indicated at 2, p , Thevwell is thus vertically supported within the tank in axial alignment with the opening »8‘ of the hatch collar so that when the hatch cover is open, the hatch and thie?ng operations may be carried on within the well.‘ In order to ?ll the well with the liquid in the vessel and establish like conditions therein, the pipe I‘! is provided with vertically spaced series of inlet openings 23, 24, 25, and 25, each series of open ingsv ‘being arranged circumferentially in the pipe. ‘ It isobvious that the liquid entering the vessel ‘will also ?ll the well so that the accumulating 2,676,893 liquid within the well will have the same char acteristics as the liquid at corresponding levels within the tank. Therefore, sampling the liquid from the well gives the same samples as if they were taken directly from the liquid in the vessel. The upper series of inlet openings which are in connection with the vapor space of the vessel also allow for equalization of pressures in the vessel for maintaining the same hydro-static level so that the gauging may be accurately car ried on within the well. To prevent loss of Vapor through the inlet openings that are in connection with the vapor space IS, the pipe I‘! is provided with valves which are shown in the form of collars 21, 28, ‘29, and 30 that are slidable on the pipe and which are retained in a spaced relation corre sponding to spacing of the series of ports by the liquid in the tank. With this height and knowing the capacity of the tank and displace ments therein, the quantity of liquid may be readily calculated. If samples of the liquid are required, they may be taken by lowering a sampler through the open hatch and taking samples at the desired levels in accordance with the usual practice. After the sampling or gaug ing operations are completed, the open hatch 10 cover is swung to a closed position to e?ect simultaneous movement of the valve collars into uncovering relation with the inlet ports to the well. It is obvious that openings may be provided to allow inlet of tank ?uids into the well at any level and the number of series and size may be changed to suit the particular vessel and sam pling practices and the type of ?uids normally collected in the vessel. means of tie rods 31. Each collar is preferably From the foregoing it is obvious that I have of substantial channel-shaped cross section to provided a simple and relatively inexpensive ap provide a web portion 32 that encircles the inlet paratus through which a liquid containing vessel openings of a respective series of inlet ports and may be gauged or samples taken without per to provide circumferential ?anges 33 and 34 for mitting loss of any of the vapor accumulated connection of the tie rods 3|. The ends of the within the vapor space of the vessel. tie rods may extend through openings 35 of the I claim: ?anges and are connected therewith by nuts 36 1. In a vessel for containing a volatile liquid and 31 that are threaded on the ends of the and having a hatch forming a gauging and rods and retained in clamped contact with the sampling opening and provided with a cover for respective sides of the ?anges as best shown in Fig. 2. 30 closing said opening, a vertical duct within the vessel and having connection with the hatch, said When thus connected, the valve collars are duct having a lateral port in connection with adapted to be moved as a unit into and out of vapor space in said vessel and having a lower closing relation with the inlet ports responsive to action of a spring 38 upon opening and closing inlet for admitting liquid from the vessel into of the hatch cover 6. The spring 38 is shown as coiled about the pipe H and has one end en gaging a stop 39 and its upper end seating said vertical duct, a valving member for the lateral port, and means for shifting the valving member relatively to said lateral port responsive to opening and closing of the hatch cover. against the ?ange 34 of for example the lower valve collar 39 as shown in Fig. 2 so that the spring supports the collars in closing relation with the respective series of inlet ports when the hatch cover is open. In order to move the collars in opposition to the coil spring 38 and eifect opening of the inlet ports when the hatch is closed, the upper ?ange 33 of the uppermost valve collar 21 carries pins 40 and 4| that are connected similarly to the tie rods and which are slidably supported in 2. In a vessel for containing a, volatile liquid having a hatch collar forming a gauging and sampling opening and provided with a cover for closing said opening, a tube connected with the hatch collar and depending within the vessel, said tube having a lateral port in connection with vapor space in said vessel and having a lower inlet for admitting liquid from the vessel, a valving member for the lateral port, and means connected with the valving member and slidable through the hatch collar for engagement by the openings 42 and 43 of the hatch collar 1 as shown in Fig. 2. The pins are of a length to project 50 hatch cover when the cover is closed for retain ing the valving member out of closing relation a su?icient distance above the seating flange 9 with the lateral port. so that when the cover In is closed the pins are 3. In a vessel for containing a volatile liquid engaged thereby and moved downwardly to shift and having a hatch forming a gauging and the valve collars from covering relations with the inlet ports as shown in Fig. 1. Thus, when 55 sampling opening and provided with a cover for closing said opening, a tube depending from the hatch opening into said vessel and having verti cally spaced series of lateral ports in connection with the vessel for admitting liquid and vapor sponding with the liquid in the vessel and main tenance of the same hydro-static head. 60 to said tube, valving members for said ports, means inter-connecting the valving members, In gauging a tank equipped with gauging and and means connected with the valving members sampling well constructed and assembled as de and engageable by the cover for shifting the scribed, the hatch cover I0 is opened. During valving members relatively to said ports respon opening of the hatch, the spring 38 acting under the ?ange 34 of the collar 30 eifects movement 65 sive to the movement of the cover. 4. A gauging and sampling well for vessels con of all the valve collars in closing relation with taining volatile liquids including a tube adapted the inlet ports so that the liquid in the well is for vertical support in a vessel and having an isolated from the liquid and vapor space within open upper end and provided with inlet ports ar the vessel. Closure of the inlet openings that are in connection with the vapor space prevents 70 ranged at different levels along the height of said tube, valving members, means movably support loss of any vapors through the hatch opening ing the valving members for movement to and while the gauging and sampling is being effected. from said ports, means for shifting the valving In gauging the liquid a suitable gauge rod is members in a direction to close said ports, a lowered through the hatch and into the liquid trapped within the well to obtain the height of 75 hatch at the upper end of the tube having a the hatch is closed, the ports provide connections between the interior of the vessel and the well to assure ?lling of the well with liquid corre 2,576,893 cover for closing the open upper end of the tube, and means connected with the valving members and engageable with the cover for shifting the valving members from covering relation with said ports when the cover is closed. 5. A gauging and sampling well for vessels con taining volatile liquids including a tube adapted for vertical support in the vessel and having an open upper end and provided with vertically position for shifting the valving collars out of covering relation with said ports. 7. In a vessel for containing a volatile liquid and having a hatch forming a gauging and sampling opening and provided with a cover for closing said opening, a tube depending within the hatch opening and having lateral ports in con nection with the vessel for admitting liquid and vapor to said tube, a bracket carried by a wall spaced inlet ports, valving collars having sliding 10 of the tank for supporting the lower end of the support on the tube to open and close said ports, tie rods connecting the valving collars, a coil spring on said tube having one end engaging one tube, valving members for said ports, means inter-connecting the valving members, and means connected with the valving members and of the valving members to normally retain the engageable by the cover for shifting the valving valving collars in closing relation with said ports, 15 members out of covering relation with said ports a hatch at the upper end of the tube having a cover for closing said open upper end, and means between the upper valve collar and the hatch cover for shifting the valve collars out of covering relation with said ports when the hatch cover is closed. 6. A gauging and sampling well for vessels con taining volatile liquids including a tube adapted for vertical support in the vessel and having an open upper end and provided with vertically spaced inlet ports, valving collars having sliding when the cover is closed. 8. In a vessel for containing a volatile liquid and having a hatch forming a gauging and sampling opening and provided with a cover for 20 closing said opening, a tube depending within the hatch opening and having lateral ports in con nection with the vessel for admitting liquid and Vapor to said tube, a bracket carried by a wall .of the tank for supporting the lower end of the 25 tube, valving members for said ports, means inter-connecting the valving members, means support on the tube, tie members inter-connect connected with the valving members and engage ing the valving collars to provide a shiftable able by the cover for shifting the valving mem unit, a coil spring engaging said unit to normally hers out of covering relation with said ports when retain the unit in position for the valving collars 30 the cover is closed, and a spring for moving the to close said ports, a hatch at the upper end of valving members into closing relation to said the tube having a cover for closing said open ports when the cover is opened. upper end, and means connected with said unit JAMES W. STEWART, JR. and having support in the hatch to be engaged by said cover when the cover is moved to closing No references cited.