valve seat

Abstract

The application provides a valve seat, comprising: a housing, a plurality of valve cores and a control mechanism, the housing comprises a main passage and a plurality of branch passages, the plurality of branch passages are communicated with the main passage; each of the valve cores is arranged in the housing and is capable of moving relative to the corresponding branch passage to open or close the corresponding branch passage; the control mechanism is capable of controlling the movement of the plurality of valve cores to close at least one of the plurality of branch passages; the valve seat is configured such that one of the plurality of branch passages is closed and the rest are opened, and the control mechanism is configured to open one branch passage in the closed state while any one of the plurality of branch passages in the open state is closed. The valve seat in the application is suitable for installing a safety valve of a pressure vessel.

Description

TECHNICAL FIELD

[0001] The present application relates to a valve seat, in particular to a valve seat applied to a safety valve of a pressure vessel. BACKGROUND

[0002] The valve seat is applied to split a fluid in a pipeline, for example, to split a fluid into multiple paths. The valve seat is provided with a main passage and multiple branch passages, and includes a control mechanism. The control mechanism can control the opening or closing of the branch passages to change the communication state of the branch passages. SUMMARY

[0003] The present application provides a valve seat, including: a housing, multiple valve cores and a control mechanism, the housing including a main passage and multiple branch passages, the multiple branch passages being in communication with the main passage; each of the valve cores is arranged in the housing and can move relative to the corresponding branch passage to open or close the corresponding branch passage; the control mechanism can control the movement of the multiple valve cores to close at least one of the multiple branch passages; the valve seat is configured such that one of the multiple branch passages is closed and the remaining passages are open, and the control mechanism is configured to open one branch passage in a closed state while closing any branch passage in an open state.

[0004] The valve seat as described above, each of the multiple valve cores includes a valve core control portion protruding from the housing, the valve core control portion can be in contact with the control mechanism and move in the branch passage under the push of the control mechanism; the valve seat further includes multiple valve core retaining portions arranged to apply force to the valve core to retain the valve core in a position to close the corresponding branch passage.

[0005] The valve seat as described above, the control mechanism includes an operation portion, the operation portion includes multiple handles and multiple handle return members, the handles are arranged to be rotatable relative to the housing to contact or leave the valve cores, the handle return members are configured to apply force to the handles to overcome the force applied to the valve cores by the valve core retaining portions, so that the handles are in contact with the valve core control portions and retain the valve cores in a position to open the corresponding branch passages.

[0006] The valve seat as described above, the control mechanism further includes a locking fitting portion, each of the multiple handles includes a handle locking portion, the control mechanism is configured such that the handle locking portion of each handle cooperates with the locking fitting portion to lock or unlock the corresponding handle; wherein when the handle is locked, the handle leaves the corresponding valve core and the corresponding branch passage is closed; when the handle is unlocked, the handle contacts the corresponding valve core and the corresponding branch passage is opened.

[0007] The valve seat as claimed in any one of the preceding claims, wherein the locking matching part is configured to be rotatable between a first position and a second position relative to the housing, and in a direction from the first position to the second position, the handle locking part pushes the locking matching part to rotate to enable the handle locking part to match with the locking matching part to a locking position; the locking matching part pushes the handle locking part to rotate to enable the handle locking part to be unlocked from the locking matching part.

[0008] The valve seat as claimed in any one of the preceding claims, wherein the locking matching part comprises a connecting shaft and a plurality of matching protrusions, the matching protrusions are fixedly connected with the connecting shaft, and the matching protrusions extend towards an outer surface of a side of the handle; the handle comprises oppositely arranged first and second sides, the first side is capable of contacting the valve core, the handle locking part extends from the second side and extends towards a distal end of the handle, and the handle locking part extends away from an outer surface of the second side; while any one of the handle locking parts pushes a corresponding matching protrusion to move, another locked handle pushes a corresponding handle locking part to move, so that while any one of the handles is locked, another locked handle is unlocked.

[0009] The valve seat as claimed in any one of the preceding claims, wherein the valve seat comprises a plurality of valve core channels, the valve core channels extend at an angle relative to corresponding branch channels, the valve core is arranged in the valve core channel and is capable of moving relative to the valve core channel; the valve core retaining part comprises a balance channel, two ends of the balance channel are respectively in communication with the valve core channel and the main channel.

[0010] The valve seat as claimed in any one of the preceding claims, wherein the valve seat further comprises a handle limiting part, the handle limiting part is configured to limit a rotation angle of the handle in a direction away from the valve core.

[0011] The valve seat as claimed in any one of the preceding claims, wherein the locking matching part further comprises a locking matching reset part, the valve seat further comprises a locking matching reset part mounting part, the locking matching reset part is arranged in the locking matching reset part mounting part and is configured to enable the locking matching part to return to the first position.

[0012] The valve seat as claimed in any one of the preceding claims, wherein the main channel is connected with a pressure device, and each of the plurality of branch channels is connected with a safety valve.

[0013] This application provides a valve seat, which includes a main channel, multiple branch channels, and a control mechanism. The main channel communicates with the multiple branch channels, and the control mechanism controls the communication status of the multiple branch channels. The valve seat in this application is configured to keep one branch channel normally closed. When the control mechanism closes any branch channel that is currently open, it can simultaneously open the branch channels that are currently closed. The valve seat in this application can be used to install multiple safety valves on a pressure vessel. Each safety valve is connected to a branch channel. When maintenance of a safety valve is required, the branch channel corresponding to the safety valve is closed, and the previously closed branch channels are opened. The total discharge capacity of all safety valves on the valve seat remains unchanged, allowing the pressure vessel to operate continuously. The valve seat in this application can install multiple safety valves with smaller discharge capacities, ensuring that the total discharge capacity of the multiple safety valves meets the requirements of the pressure vessel. Attached Figure Description

[0014] FIG. 1A This is a perspective view of the valve seat in this application;

[0015] FIG. 1B yes FIG. 1A Exploded view of the middle valve seat;

[0016] FIG. 2A yes FIG. 1B A three-dimensional view of the middle shell;

[0017] FIG. 2B yes FIG. 1B A three-dimensional view of the inner shell from another angle;

[0018] FIG. 2C yes FIG. 1B A sectional view of the inner shell;

[0019] FIG. 2D yes FIG. 1B A cross-sectional view of the inner shell from another angle;

[0020] FIG. 3 yes FIG. 1B A 3D view of a valve core;

[0021] FIG. 4A yes FIG. 1B A three-dimensional view of the operating section of the central control mechanism;

[0022] FIG. 4B yes FIG. 4A Exploded view of the central operating section;

[0023] FIG. 5 yes FIG. 1B A three-dimensional view of the locking mating part;

[0024] FIG. 6 yes FIG. 1A A cross-sectional view of the valve seat in the middle;

[0025] FIG. 7 is FIG. 1A side view of the valve seat in the first state;

[0026] FIG. 8 is FIG. 1A front view of the valve seat in the first state;

[0027] FIG. 9A is FIG. 8 cross-sectional view of the valve seat in the first state along the line A-A in

[0028] FIG. 9B is FIG. 8 cross-sectional view of the valve seat in the first state along the line B-B in

[0029] FIG. 9C is FIG. 8 cross-sectional view of the valve seat in the second state along the line A-A in

[0030] FIG. 9D is FIG. 8 cross-sectional view of the valve seat in the second state along the line B-B in

[0031] FIG. 9E is FIG. 8 cross-sectional view of the valve seat in the third state along the line A-A in

[0032] FIG. 9F is FIG. 8 cross-sectional view of the valve seat in the third state along the line B-B in

[0033] FIG. 9G is FIG. 8 cross-sectional view of the valve seat in the fourth state along the line A-A in

[0034] FIG. 9H is FIG. 8 cross-sectional view of the valve seat in the fourth state along the line B-B in DETAILED DESCRIPTION

[0035] Various specific embodiments of the present application will be described below with reference to the accompanying drawings, which are incorporated in, and constitute a part of, this specification. It should be understood that, although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "positive", "negative", "proximal", "distal", "lateral", "longitudinal", and the like, are used in the present application to describe various example structural parts and elements of the present application, these terms are used herein only for the purpose of convenience of explanation and are determined based on the example orientation shown in the accompanying drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating directions are used only for explanation and should not be considered as limiting.

[0036] FIG. 1A is a perspective view of a valve seat in the present application, FIG. 1B is FIG. 1A is an exploded view of a valve seat in the present application. As shown in FIG. 1A and FIG. 1B , the valve seat 100 includes a housing 101, a control mechanism 150, valve spools 121, 122, and 123, and has a length direction L, a width direction W, and a height direction H. The control mechanism 150 includes an operation portion 103 and a lock-fitting portion 104. The housing 101 includes a main passage 210 and branch passages 211, 212, and 213 (see FIG. 2D ) communicating with the main passage 210. The main passage 210 communicates with the branch passages 211, 212, and 213. The valve spools 121, 122, and 123 are respectively provided in the branch passages 211, 212, and 213, and are movable in the branch passages 211, 212, and 213 to open or close the corresponding branch passages. The operation portion 103 is capable of controlling the movement of the valve spools 121, 122, and 123, and cooperates with the lock-fitting portion 104 to control the communication state of the branch passages 211, 212, and 213.

[0037] FIG. 2A is FIG. 1B is a perspective view of a housing in the present application, FIG. 2B is FIG. 1B is another perspective view of a housing in the present application, FIG. 2C is FIG. 1B is a sectional view of a housing in the present application, FIG. 2D is FIG. 1B is another perspective view of a housing in the present application. As shown in FIG. 2A-2D , the housing 101 includes a main body 208 and a control mechanism support portion 209. The main body 208 is provided with the main passage 210, the branch passages 211, 212, and 213, and valve spool passages 216, 217, and 218. The main body 208 includes a front side 231, a rear side 232, an upper side 233, and a lower side 234. The control mechanism support portion 209 is connected to the front side 231 of the main body 208.

[0038] The main body 208 has a main passage 210 and branch passages 211, 212 and 213. The main passage 210 is proximate to the lower side 234 of the main body 208 and extends substantially along the length direction L of the valve seat 100. The branch passages 211, 212 and 213 extend substantially along the height direction H of the valve seat 100 and are arranged side by side. Each branch passage communicates with the main passage 210 at one end and communicates with the outside of the valve seat 100 at the other end through a surface of the upper side 233 to form branch passage openings 242, 243 and 244. Each branch passage communicates with the outside of the valve seat 100 through the corresponding branch passage opening. The main passage 210 also has a main opening 241 formed on a surface of the lower side 234 of the main body 208, through which the main passage 210 communicates with the outside of the valve seat 100. Fluid can enter the main passage 210 through the main opening 241 and then enter the branch passages 211, 212 and 213 respectively. The valve core passages 216, 217 and 218 extend substantially along the width direction W of the valve seat 100 and intersect the branch passages 211, 212 and 213 respectively. Each branch passage forms an intersection section 248 at the intersection with the corresponding valve core passage. The front end 281 of each valve core passage forms a valve core opening 282 through the front side 231 of the main body 208. A valve core limiting member 269 is arranged near the valve core opening 282. The valve core limiting member 269 is a cylindrical member with a certain thickness. A portion of the valve core limiting member 269 is located in the front end 281 and has an inner diameter smaller than that of the valve core passage, so as to prevent the valve core from moving away from the corresponding branch passage. The rear end 283 of each valve core passage has a spacing with the rear side 232 of the main body 208, that is, the rear end 283 of each valve core passage is closed to form an end face 286. A balance passage 255 is arranged between each valve core passage and the corresponding branch passage. One end of the balance passage 255 communicates with the rear end 283 of the valve core passage, and the other end communicates with the end of the branch passage proximate to the main passage 210. In another embodiment of the present application, one end of the balance passage 255 communicates with the rear end 283 of the valve core passage, and the other end communicates with the main passage 210.

[0039] In an embodiment of the present application, the balance passage 255 forms a valve core retaining portion, which can retain the valve core at a position away from the end face 286. The valve core retaining portion of the present application can be an elastic element or other fluid passage capable of applying force to the valve core to retain the valve core at a position away from the end face 286.

[0040] In an embodiment of the present application, three branch passages communicate with one main passage, and the fluid in the main passage is divided into three paths when flowing into the branch passages. In another embodiment of the present application, the number of branch passages can be other numbers.

[0041] The housing 101 further comprises a main opening extension pipe 261 extending outwardly from the edge of the main opening 241, and branch passage extension pipes 262, 263, 264 extending outwardly from the edges of the branch passage openings 242, 243, 244. The main opening extension pipe 261 and the branch passage extension pipes 262, 263, 264 facilitate the connection of the valve seat to the mounting site.

[0042] The control mechanism support portion 209 comprises support blocks 251, 252, 253, and 254. The support blocks 251, 252, 253, and 254 extend from the front side 231 of the main body 208 and are arranged side by side. Between adjacent support blocks, accommodation grooves 271, 272, and 273 are formed for accommodating the handle. The valve core opening of each valve core passage is arranged towards the corresponding accommodation groove 271, 272, and 273.

[0043] The housing 101 further comprises rods 277, 278, 279 arranged in the accommodation grooves 271, 272, 273 respectively, and the two ends of each rod are connected to the opposite sides of the adjacent support blocks. The rods 277, 278, 279 are arranged in the lower part of the housing 101. The rods 277, 278, 279 form handle limiting portions that can limit the rotation angle of the handle.

[0044] The housing 101 further comprises limiting blocks 287, 288, 289 arranged in the accommodation grooves 271, 272, 273 respectively, and the two ends of each limiting block are connected to the opposite sides of the adjacent support blocks. The limiting blocks 287, 288, 289 are closer to the main body 208 than the rods 277, 278, 279.

[0045] The support blocks 251 and 254 at both ends are respectively provided with a groove 292 and a hole, a protrusion 293 is arranged in the groove 292, and the protrusion 293 is arranged towards one side wall 294 of the groove 292. The protrusion 293 and the side wall 294 of the groove 292 together form a locking and fitting reset member mounting portion 295.

[0046] FIG. 3 is FIG. 1B A perspective view of one of the valve cores. FIG. 1B The valve cores 121, 122, 123 in FIG. 3 The structure of the valve core 121 is taken as an example to introduce the structure of the valve core. As FIG. 3As shown, the valve core 121 includes a front section 311, a middle section 312 and a rear section 313. The diameter of the middle section 312 is greater than the diameters of the front section 311 and the rear section 313. The middle section 312 is provided with a through hole 366 extending along the radial direction and penetrating the middle section, and the through hole 366 is capable of being aligned with the branch passage 211. The outer side of the middle section 312 is provided with sealing ring mounting grooves 334 and 335 for mounting sealing rings. The diameter of the middle section 312 matches the size of the valve core passage 216, so that the middle section 312 is capable of moving in the valve core passage 216, and so that the sealing rings mounted on the middle section 312 are capable of forming a seal with the inner wall of the valve core passage 216. The distal end of the front section 311 forms a valve core control portion 314, which is capable of cooperating with the corresponding handle.

[0047] FIG. 4A is FIG. 1B a perspective view of the operation portion of the middle control mechanism, FIG. 4B is FIG. 4A an exploded view of the operation portion. As FIG. 4A and FIG. 4B shown, the operation portion includes handles 431, 432, 433, handle return members 441, 442, 443, and an operation portion support rod 450. The operation portion support rod 450 passes through the support blocks 252 and 253, and its two ends are respectively connected with the support blocks 251 and 254. The operation portion support rod 450 is closer to the main body 208 of the housing than the rods 277, 278 and 279.

[0048] The operation portion includes handles 431, 432, 433, each of which is sleeved on the operation portion support rod 450 and is capable of rotating relative to the operation portion support rod 450. The handle return members 441, 442, 443 are sleeved on the operation portion support rod 450 and are arranged between the handles 431, 432, 433 and the housing.

[0049] Each of handles 431, 432, and 433 includes a first side 481 and a second side 482 disposed opposite to each other, as well as a proximal end 491 and a distal end 492. The proximal end 491 has a pair of ears 497 and 498. The ears 497 and 498 are provided with holes to allow the operating part support rod 450 to pass through, thereby allowing the handle reset member to rotate about the operating part support rod 450. A receiving portion 499 is formed between the pair of ears 497 and 498, which can accommodate the corresponding handle reset member. Near the receiving portion 499, the handle has a groove 496 recessed from the second side 482 toward the first side 481 for accommodating the lead-out end of the handle reset member. The distal end 492 of the handle is provided with a handle protrusion 495 for operator operation. In one embodiment of this application, the handle protrusion 495 is cylindrical. The first side 481 of the handle is arranged toward the valve core. The second side 482 is provided with a handle locking portion extending from the surface of the second side 482. The handle locking portion extends curvedly toward the distal end 492 in a direction away from the second side 482, and its surface toward the second side 482 forms a curved arc. Handles 431, 432, and 433 have handle locking portions 464, 465, and 466, respectively.

[0050] Each of the handle reset components 441, 442, and 443 includes a cylindrical body 467 and a pair of leads 468 and 469. The body 467 is sleeved on the operating part support rod 450. The leads 468 and 469 abut against the housing 101 and the corresponding handle, respectively, and apply a spring force to the corresponding handle so that the handle can be reset.

[0051] FIG. 5 yes FIG. 1B A three-dimensional view of the locking mating part. (See diagram below.) FIG. 5 As shown, the locking engagement portion 104 includes a connecting shaft 515, engaging protrusions 521, 522, and 523, and locking engagement reset members 541 and 542. The connecting shaft 515 is rotatably connected to the housing 101. The connecting shaft 515 passes through the support blocks 252 and 253 of the housing 101, and its two ends are respectively located in the grooves 292 of the support blocks 251 and 254. The engaging protrusions 521, 522, and 523 are fixedly connected to the connecting shaft 515 and can rotate with the connecting shaft 515. The locking engagement reset members 541 and 542 are respectively sleeved on both ends of the connecting shaft 515 and fixedly connected to the connecting shaft 515. Each of the locking engagement reset members 541 and 542 has a pair of lead-out ends 561 and 562. The locking engagement reset members 541 and 542 are located in the locking engagement reset member mounting portions 295 of the grooves 292 of the support blocks 251 and 254. One side of the mating protrusions 521, 522 and 523 has a curved surface and is arranged toward the corresponding handle protrusion.

[0052] FIG. 6 yes FIG. 1AA cross-sectional view of the valve seat. FIG. 6 The valve seat is sectioned along its height and width, with the section plane located at the midpoint of its length. FIG. 6 The cut surface roughly passes through the middle of valve core 122. For example... FIG. 6 As shown, valve core 122 is located in valve core channel 217. FIG. 6 The branch channel 212 shown is in the open state, and the through hole 366 of the valve core 122 is aligned with the branch channel 211, allowing fluid to flow from the main channel 210 through the branch channel 212 to the branch channel opening 243. The rear section 313 of the valve core 122 abuts against the end face 286 of the valve core channel 217. The diameter of the rear section 313 is smaller than the diameter of the branch channel 212, so that when the valve core 122 abuts against the end face 286 of the valve core channel 217, an annular space 628 can be formed between the rear section 313 and the inner wall of the branch channel. The annular space 628 is connected to one end of the balance channel 255, and the other end of the balance channel 255 is connected to the position of the branch channel 212 near the main channel 210. The fluid in the balance channel 255 has a certain pressure, causing the valve core 122 to tend to move away from the end face 286. When the front section 311 of the valve core 122 is not subjected to external force, the valve core 122 can move to the farthest position relative to the end face 286, and the middle section 312 of the valve core 122 can abut against the valve core limiting member 269.

[0053] The handle 432 abuts against the valve core control portion 314 of the valve core 122. One end of the handle reset member 422 abuts against the limiting block 288 of the housing 101, and the other end abuts against the groove 496 of the handle 432. The handle reset member 422 applies a spring force to the handle 432, enabling it to apply pressure to the valve core 122, causing the valve core 122 to tend to move toward the end face 286. In this application, the spring force of the handle reset member 422 is set such that the force applied by the handle 432 to the valve core 122 is greater than the force applied by the fluid in the balance channel 255 to the valve core 122, so that the valve core 122 can be held in the position closest to the end face 286, and the branch channel 212 remains open.

[0054] FIG. 7 yes FIG. 1A A side view of the valve seat shows the positional relationship between one end of the locking engagement 104 and the housing. (As shown...) FIG. 7 As shown, the locking engagement reset member 541 of the locking engagement part 104 is located in the groove 292 of the housing 101. The lead-out ends 561 and 562 of the locking engagement reset member abut against the protrusion 293 and the side wall 294 of the groove 292 respectively, and are in a compressed state, so that the locking engagement part 104 can be held in a specific position.

[0055] FIG. 8 yes FIG. 1A A front view of the middle valve seat, combined withFIG. 2A-8 As shown, handle 431 is disengaged from valve core 121, and the through hole of valve core 121 is offset from branch channel 211. Handles 432 and 433 abut against valve cores 122 and 123 respectively, and the through holes of valve cores 122 and 123 are aligned with branch channels 212 and 213 respectively, so that branch channel 211 is in the closed state and branch channels 212 and 213 are in the open state.

[0056] FIG. 9A yes FIG. 8 A cross-sectional view of the valve seat taken along line AA in the first state. FIG. 9B yes FIG. 8 A cross-sectional view of the valve seat in the first state, cut along line BB. FIG. 9C yes FIG. 8 A cross-sectional view of the valve seat in the second state, taken along line AA. FIG. 9D yes FIG. 8 A cross-sectional view of the valve seat in the second state, taken along line BB. FIG. 9E yes FIG. 8 A cross-sectional view of the valve seat in the third state, taken along line AA. FIG. 9F yes FIG. 8 A cross-sectional view of the valve seat in the third state, cut along line BB. FIG. 9G yes FIG. 8 A cross-sectional view of the valve seat in the fourth state, taken along line AA. FIG. 9H yes FIG. 8 The valve seat in the fourth state is a cross-sectional view cut along line BB.

[0057] FIG. 9A-9H The process of switching the connection state of the branch channel of the valve seat is shown. For example... FIG. 9A As shown, branch channel 211 is closed and branch channel 212 is open. Handle 431 is positioned away from valve core 121. The handle locking part 464 of handle 431 is located below the mating protrusion 521, thus locking handle 431 by locking mating part 104 and preventing it from moving towards valve core 121. Fluid in balance channel 255 applies pressure to valve core 121, causing it to move to the position furthest from the end face 286 of valve core channel. The through hole 366 of valve core 121 is offset from branch channel 211, and branch channel 211 is closed by the middle section 312 of valve core 121, disconnecting branch channel 211 from main channel 210, thus closing branch channel 211.

[0058] At this time, both branch channels 212 and 213 are in the open state. FIG. 9BThe state of branch passage 212 is shown. Handle return member 442 applies elastic force to handle 432, so that handle 432 holds spool 122 at a position closest to the end face of spool passage 217, the through hole of spool 122 is aligned with branch passage 212, and fluid can flow through the through hole of spool 122 to branch passage opening 243. Branch passage 213 is in the same state as branch passage 212.

[0059] In some applications, it is required to close one of the opened branch passages and open the branch passage that is currently in the closed state. For example FIG. 9C-9H The process of closing branch passage 212 and opening branch passage 211 is shown.

[0060] As FIG. 9D When it is required to close branch passage 212, force is applied to handle 432 to rotate it away from spool 122. Handle locking portion 465 of handle 432 moves towards and above cooperating protrusion 522. At this time, spool 122 will move away from the end face of spool passage under the action of fluid pressure in balance passage 255. As FIG. 9C The state of branch passage 211 remains unchanged and is still in the closed state.

[0061] As FIG. 9F Continuing to apply force to handle 432 in the state shown in FIG. 9D When force is continuously applied to handle 432, handle locking portion 465 of handle 432 applies pressure to cooperating protrusion 522 to rotate it around the axis of connecting shaft 515, and handle locking portion 465 can pass cooperating protrusion 522 to be below cooperating protrusion 522. Rod 278 can limit the maximum distance of handle 432 rotating away from spool 122. Spool 122 moves away from the end face of spool passage to the farthest position, the through hole of spool 122 is misaligned with branch passage 212, and branch passage 212 is closed. Cooperating protrusion 522 returns to the initial position shown in FIG. 9B under the action of locking cooperating return members 541 and 542.

[0062] As FIG. 9EAs shown, when the handle locking portion 465 pushes the matching protrusion 522 to rotate, since the matching protrusion 522 is fixedly connected with the connecting shaft 515, the connecting shaft 515 will rotate together with the matching protrusion 522, at the same time, the matching protrusion 521 rotates together with the connecting shaft 515, and can pass the handle locking portion 465 of the handle 431 to reach below the handle locking portion 465, so that the handle locking portion 465 is unlocked. Under the action of the handle reset member 442, the handle locking portion 465 rotates towards the valve core 121, and pushes the valve core 121 to move to the nearest position after contacting the valve core control portion 314. The through hole of the valve core 121 is aligned with the branch passage 212, so that the branch passage 212 is opened.

[0063] As shown, when the handle reset member 442 pushes the handle 432 to rotate towards the valve core 122, the handle locking portion 465 contacts and is below the matching protrusion 522. The matching protrusion 522 limits the handle 432 from further rotating towards the valve core 122, so that the handle 432 is locked. The valve core 122 remains in the closed state. In this process, the state of the handle 431 remains unchanged, and the branch passage 211 remains in the open state. FIG. 9H In the process, the branch passage 212 is closed, while the branch passage 211 is opened, and the branch passage 213 remains unchanged. Similarly, if the branch passage 213 is closed, the branch passage 211 can also be opened at the same time, and the branch passage 212 remains unchanged. In the application of the valve seat in the present application, one branch passage is kept in the closed state, and the remaining branch passages are kept in the open state. When it is necessary to close any one of the branch passages in the open state, the corresponding handle can be operated to close the branch passage while opening the branch passage which was previously closed.

[0064] FIG. 9A-9H In an application of the present application, the valve seat is used to be connected to a pressure container, the main passage thereof is connected to the pressure container, and each branch passage is communicated with a safety valve. When one of the safety valves needs to be inspected or modified, the corresponding branch passage is closed, and the previously closed branch passage is opened. This makes the discharge capacity of the safety valve always meet the requirements. The valve seat in the present application can be provided with multiple branch passages to connect multiple safety valves with smaller discharge capacity. The use of the valve seat in the present application only requires that the total discharge capacity of the multiple safety valves meets the requirements, and a safety valve with a smaller individual discharge capacity can be selected.

[0065] In an application of the present application, the valve seat is used to be connected to a pressure container, the main passage thereof is connected to the pressure container, and each branch passage is communicated with a safety valve. When one of the safety valves needs to be inspected or modified, the corresponding branch passage is closed, and the previously closed branch passage is opened. This makes the discharge capacity of the safety valve always meet the requirements. The valve seat in the present application can be provided with multiple branch passages to connect multiple safety valves with smaller discharge capacity. The use of the valve seat in the present application only requires that the total discharge capacity of the multiple safety valves meets the requirements, and a safety valve with a smaller individual discharge capacity can be selected.

[0066] ​While the present disclosure has been described in connection with the illustrative examples described above, various alternative, modifications, variations, improvements, and / or substantial equivalents that are or can be presently unforeseeable can be made by persons skilled in the art with the benefit of the present disclosure. Additionally, the techniques described in this specification can be implemented in software, firmware, hardware, or a combination thereof, and can be implemented in an integrated circuit, a discrete circuit, or a combination thereof. In addition, where appropriate, the described techniques can be implemented using computer software, firmware, hardware, or any combination thereof. Further, where appropriate, elements of the described techniques can be performed in the order described in this specification. Alternatively, unless otherwise specified, elements of the described techniques can be performed in any order. The disclosed embodiments are illustrative of the disclosure but not limiting thereof. Numerous other embodiments will become apparent to those skilled in the art from the foregoing description, which is to be considered in the light of the appended claims.

Claims

1. A valve seat, characterized in that Comprising: a housing including a main passage and a plurality of branch passages communicating with the main passage; a plurality of valve cores each disposed in the housing and movable relative to a corresponding branch passage to open or close the corresponding branch passage of the plurality of branch passages; and a control mechanism including: a plurality of handles each rotatable relative to the housing, each of the plurality of handles including a handle locking portion; and a locking fitting portion rotatable relative to the housing and configured to cooperate with the handle locking portion of each of the plurality of handles to lock or unlock each of the handles, wherein when the handle is locked in a locked state, the handle does not apply force to the corresponding valve core to allow the corresponding valve core to move and close the corresponding branch passage, and when the handle is unlocked in an unlocked state, the handle applies force to the corresponding valve core to push the corresponding valve core to open the corresponding branch passage; wherein the control mechanism is configured to, when any one of the branch passages in an open state is closed by switching the corresponding handle from the unlocked state to the locked state, the locking fitting portion rotates relative to the housing and unlocks the handle corresponding to the branch passage in the closed state to open the branch passage in the closed state.

2. The valve seat of claim 1, wherein: each of the plurality of valve cores includes a valve core control portion protruding from the housing, the valve core control portion being movable in the corresponding branch passage of the plurality of branch passages under the pushing of the corresponding handle; the valve seat further includes a plurality of valve core retaining portions, each of the plurality of valve core retaining portions being configured to apply force to the corresponding valve core to retain the corresponding valve core in a position to close the corresponding branch passage when the corresponding handle of the plurality of handles is locked.

3. The valve seat of claim 2, wherein: the control mechanism further includes a plurality of handle return members, the plurality of handles being respectively in contact with or away from the valve core control portions of the plurality of valve cores, each of the plurality of handle return members being configured to apply force to the corresponding handle when the corresponding handle is unlocked, such that the handle is in contact with the valve core control portion to overcome the force of the corresponding valve core retaining portion acting on the valve core, thereby retaining the valve core in a position to open the corresponding branch passage.

4. The valve seat of claim 3, wherein: when the handle is locked, the handle is away from the corresponding valve core, and the corresponding branch passage is closed; when the handle is unlocked, the handle is in contact with the corresponding valve core, and the corresponding branch passage is open.

5. The valve seat of claim 4, wherein: ​ The locking fitting part is configured to be rotatable relative to the housing between a first position and a second position, wherein in a direction from the first position to the second position, the handle locking part of the handle in the unlocking state is capable of pushing the locking fitting part to rotate, so that the handle locking part and the locking fitting part are fitted to a locking position, and the locking fitting part pushes the handle locking part of the handle in the locking state to rotate, so that the handle locking part of the handle in the locking state and the locking fitting part are unlocked.

6. The valve seat of claim 4, wherein: Each of the plurality of handles comprises a first side and a second side arranged oppositely, the first side is configured to be in contact with the corresponding valve core control part, and the handle locking part extends from the second side and bends towards the distal end of the handle; The locking fitting part comprises a connecting shaft and a plurality of fitting protrusions, the plurality of fitting protrusions are fixedly connected with the connecting shaft and respectively extend towards the second sides of the plurality of handles, and each of the plurality of fitting protrusions is configured to be fitted with the handle locking part of the corresponding handle to lock or unlock the corresponding handle; When the handle locking part of any one handle in the unlocking state pushes the corresponding fitting protrusion to move, the fitting protrusion corresponding to the handle locking part of the handle in the locking state pushes the handle locking part of the handle in the locking state to move, so that any one handle in the unlocking state is locked while the handle in the locking state is unlocked.

7. The valve seat of claim 3, wherein: The valve seat comprises a plurality of valve core channels, the extension direction of the valve core channels has an angle with the corresponding branch channel, and the plurality of valve cores are respectively arranged in the plurality of valve core channels and are movable relative to the corresponding valve core channel; Each of the plurality of valve core retaining parts comprises a balance channel, and two ends of the balance channel are respectively in communication with the corresponding valve core channel of the plurality of valve core channels and the main channel.

8. The valve seat of claim 1, wherein: The valve seat further comprises a handle limiting part configured to limit the rotation angle of the plurality of handles in a direction away from the valve core.

9. The valve seat of claim 5, wherein: The locking fitting part further comprises a locking fitting reset member, and the valve seat further comprises a locking fitting reset member mounting part, the locking fitting reset member is arranged in the locking fitting reset member mounting part and is configured to enable the locking fitting part to return to the first position.

10. The valve seat of claim 1, wherein: The main channel is connected with a pressure device, and each of the plurality of branch channels is connected with a safety valve.

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