Valve seat

Abstract

The invention provides a valve seat which comprises a shell, a plurality of valve elements and a control mechanism, the shell comprises a main channel and a plurality of branch channels, and the branch channels communicate with the main channel; each valve element is arranged in the shell and can move relative to the corresponding branch channel so as to open or close the corresponding branch channel. The control mechanism can control the movement of the plurality of valve cores so as to close at least one of the plurality of branch channels; the valve seat is configured to enable one of the multiple branch channels to be closed and the other channels to be opened, and the control mechanism is configured to close any one of the multiple branch channels in the open state and open one branch channel in the closed state at the same time. The valve seat is suitable for installing the safety valve of the pressure container.

Description

Technical Field

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

[0002] The valve seat is used to divide the fluid in the pipeline, for example, to divide one fluid into multiple channels. The valve seat is provided with a main channel and multiple branch channels, and includes a control mechanism. The control mechanism can control the opening or closing of the branch channels to change the connection state of the branch channels. Summary of the invention

[0003] The present application provides a valve seat, comprising: a shell, a plurality of valve cores and a control mechanism, the shell comprising a main channel and a plurality of branch channels, the plurality of branch channels being connected to the main channel; each of the valve cores is arranged in the shell and is capable of moving relative to the corresponding branch channel to open or close the corresponding branch channel; 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 channels; the valve seat is configured so that one of the plurality of branch channels is closed and the remaining channels are opened, and the control mechanism is configured to open a branch channel in a closed state while closing any one of the plurality of branch channels in an open state.

[0004] As described above, the valve seat, each of the multiple valve cores includes a valve core control part protruding from the shell, and the valve core control part can contact the control mechanism and move in the branch channel under the push of the control mechanism; the valve seat also includes a plurality of valve core retaining parts, and the valve core retaining parts are configured to apply force to the valve core to keep the valve core in a position to close the corresponding branch channel.

[0005] As described above, the control mechanism includes an operating part, which includes a plurality of handles and a plurality of handle reset members, wherein the handles are arranged to be rotatable relative to the housing to contact or leave the valve core, and the handle reset members are configured to apply force to the handles to overcome the force of the valve core retaining part acting on the valve core, so that the handles contact the valve core control part and retain the valve core in a position to open the corresponding branch channel.

[0006] As for the valve seat as described above, the control mechanism also includes a locking mating portion, each of the multiple handles includes a handle locking portion, and the control mechanism is configured so that the handle locking portion of each handle cooperates with the locking mating 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 channel is closed; when the handle is unlocked, the handle contacts the corresponding valve core, and the corresponding branch channel is opened.

[0007] As for the valve seat as described above, the locking fitting part is configured to be able to rotate between a first position and a second position relative to the shell, and in the direction from the first position to the second position, the handle locking part pushes the locking fitting part to rotate so that the handle locking part and the locking fitting part cooperate to reach a locked position; the locking fitting part pushes the handle locking part to drive the handle to rotate so that the handle locking part and the locking fitting part are unlocked.

[0008] As for the valve seat as described above, the locking mating part includes a connecting shaft and a plurality of mating protrusions, the mating protrusions are fixedly connected to the connecting shaft, and the mating protrusions extend toward the outer surface of one side of the handle; the handle includes a first side and a second side arranged opposite to each other, the first side can contact the valve core, the handle locking part extends from the second side and bends and extends toward the distal end of the handle, and the handle locking part extends away from the outer surface of the second side; when any one of the handle locking parts pushes the corresponding mating protrusion to move, the corresponding mating protrusion of the other locked handle pushes the corresponding handle locking part to move, so that when any one handle is locked, the other locked handle is unlocked.

[0009] As described above, the valve seat comprises a plurality of valve core channels, the extension direction of the valve core channels has a certain angle with the corresponding branch channels, the valve core is arranged in the valve core channel and can move relative to the valve core channel; the valve core retaining portion comprises a balancing channel, the two ends of the balancing channel are respectively connected to the valve core channel and the main channel.

[0010] As described above, the valve seat further comprises a handle limiting portion, and the handle limiting portion is configured to limit the rotation angle of the handle in a direction away from the valve core.

[0011] As described above, the locking fitting portion of the valve seat further comprises a locking fitting reset member, and the valve seat further comprises a locking fitting reset member installation portion, wherein the locking fitting reset member is arranged in the locking fitting reset member installation portion and is configured so that the locking fitting portion can return to the first position.

[0012] In the valve seat as described above, the main channel is connected to a pressure device, and each of the plurality of branch channels is connected to a safety valve.

[0013] The present application provides a valve seat, which includes a main channel, multiple branch channels and a control mechanism. The main channel is connected to multiple branch channels, and the control mechanism is used to control the connection status of the multiple branch channels. The valve seat in the present application is configured to keep a branch channel normally closed, and the control mechanism can simultaneously open the branch channel in a closed state when closing any branch channel in an open state. The valve seat in the present application can be used to install multiple safety valves of a pressure vessel, each safety valve is connected to a branch channel, and when the safety valve needs to be inspected, the branch channels corresponding to the safety valve are opened at the same time. The total displacement of all safety valves on the valve seat remains unchanged, and the pressure vessel can continue to work. The valve seat in the present application can be installed with multiple safety valves with smaller discharge volumes, so that the total discharge volume of multiple safety valves meets the requirements of the pressure vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A is a three-dimensional diagram of the valve seat in this application;

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

[0016] Figure 2A yes Figure 1B A perspective view of the middle shell;

[0017] Figure 2B yes Figure 1B A three-dimensional view of the middle shell from another angle;

[0018] Figure 2C yes Figure 1B a cross-sectional view of the middle shell;

[0019] Figure 2D yes Figure 1B A cross-sectional view of the middle shell at another angle;

[0020] Figure 3 yes Figure 1B A three-dimensional diagram of a valve core;

[0021] Figure 4A yes Figure 1B A three-dimensional diagram of the operating portion of the central control mechanism;

[0022] Figure 4B yes Figure 4A Exploded view of the middle operating unit;

[0023] Figure 5 yes Figure 1B A three-dimensional view of the middle locking mating portion;

[0024] Figure 6 yes Figure 1A A cross-sectional view of a valve seat in FIG.

[0025] Figure 7 yes Figure 1A Side view of the middle valve seat;

[0026] Figure 8 yes Figure 1A Front view of the middle valve seat;

[0027] Fig.9A yes Figure 8 A cross-sectional view of the valve seat in the first state taken along line AA;

[0028] Fig. 9B yes Figure 8 A cross-sectional view of the valve seat in the first state taken along line BB;

[0029] Fig. 9C yes Figure 8 A cross-sectional view of the valve seat in the second state taken along line AA;

[0030] Fig.9D yes Figure 8 A cross-sectional view of the valve seat in the second state taken along line BB;

[0031] Fig.9E yes Figure 8 A cross-sectional view of the valve seat in the third state taken along line AA;

[0032] Fig.9F yes Figure 8 A cross-sectional view of the valve seat in the third state taken along line BB;

[0033] Figure 9G yes Figure 8 A cross-sectional view of the valve seat in the fourth state taken along line AA;

[0034] Figure 9H yes Figure 8 A cross-sectional view of the valve seat in the fourth state taken along line BB. DETAILED DESCRIPTION

[0035] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form 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", etc., are used in the present application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description, and these terms are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0036] Figure 1A is a three-dimensional diagram of the valve seat in this application, Figure 1B yes Figure 1A Exploded view of the valve seat. Figure 1A and Figure 1B As shown, the valve seat 100 includes a housing 101, a control mechanism 150, valve cores 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 operating portion 103 and a locking mating portion 104. The housing 101 includes a main channel 210 and branch channels 211, 212 and 213 communicating with the main channel 210 (see Figure 2D ), the main channel 210 is connected to the branch channels 211, 212 and 213. The valve cores 121, 122 and 123 are respectively arranged in the branch channels 211, 212 and 213, and can move in the branch channels 211, 212 and 213 to open or close the corresponding branch channels. The operating part 103 can control the movement of the valve cores 121, 122 and 123, and cooperate with the locking matching part 104 to control the communication state of the branch channels 211, 212 and 213.

[0037] Figure 2A yes Figure 1B A three-dimensional diagram of the middle shell. Figure 2B yes Figure 1B Another perspective view of the middle shell. Figure 2C yes Figure 1B A cross-sectional view of the middle shell, Figure 2D yes Figure 1B A cross-sectional view of the housing from another angle. Figure 2A-2D As shown, the housing 101 includes a main body 208 and a control mechanism support portion 209. The main body 208 is provided with a main channel 210, branch channels 211, 212 and 213, and valve core channels 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 body 208 has a main channel 210 and branch channels 211, 212 and 213. The main channel 210 is close to the lower side 234 of the body 208 and extends approximately along the length direction L of the valve seat 100. The branch channels 211, 212 and 213 extend approximately along the height direction H of the valve seat and are arranged side by side. One end of each branch channel is connected to the main channel 210, and the other end passes through the surface of the upper side 233 to form branch channel openings 242, 243, 244. Each branch channel is connected to the outside of the valve seat 100 through the corresponding branch channel opening. The main channel 210 also has a main opening 241 arranged on the surface of the lower side 234 of the body 208, and the main channel 210 is connected to the outside of the valve seat 100 through the main opening 241. The fluid can enter the main channel 210 through the main opening 241, and then enter the branch channels 211, 212 and 213 respectively from the main channel 210. The valve core channels 216, 217 and 218 extend roughly along the width direction W of the valve seat 100, and intersect with the branch channels 211, 212 and 213 respectively. The intersection section 248 is formed at the overlap of each branch channel and the corresponding valve core channel. The front end 281 of each valve core channel passes through the front side 231 of the main body 208 to form a valve core opening 282. A valve core stopper 269 is provided near the valve core opening 282. The stopper 269 is cylindrical with a certain thickness. A part of the stopper 269 is located in the front end 281, and its inner diameter is smaller than the inner diameter of the valve core channel, so as to prevent the valve core from leaving the corresponding branch channel. There is a gap between the rear end 283 of each valve core channel and the rear side 232 of the main body 208, that is, the rear end 283 of each valve core channel is closed, thereby forming an end face 286. A balancing channel 255 is provided between each valve core channel and the corresponding branch channel, one end of the balancing channel 255 is communicated with the rear end 283 of the valve core channel, and the other end is communicated with an end of the branch channel close to the main channel 210. In another embodiment of the present application, one end of the balancing channel 255 is communicated with the rear end 283 of the valve core channel, and the other end is communicated with the main channel 210.

[0039] In one embodiment of the present application, the balance channel 255 forms a valve core retaining portion, which can keep the valve core at a position away from the end surface 286. The valve core retaining portion of the present application can be an elastic element or other fluid channel that can apply force to the valve core to keep the valve core at a position away from the end surface 286.

[0040] In one embodiment of the present application, three branch channels are connected to one main channel, and the fluid in the main channel is divided into three paths when flowing to the branch channels. In other embodiments of the present application, the number of branch channels can be set to other numbers.

[0041] The housing 101 further includes a main opening extension pipe 261 extending outward from the edge of the main opening 241, and branch channel extension pipes 262, 263, 264 extending outward from the edges of the branch channel openings 242, 243, 244. The main opening extension pipe 261 and the branch channel extension pipes 262, 263, 264 facilitate the connection between the valve seat and the mounting portion.

[0042] The control mechanism support portion 209 includes 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. Accommodation grooves 271, 272 and 273 are formed between adjacent support blocks for accommodating the handle. The valve core opening of each valve core channel is arranged toward the corresponding accommodation groove 271, 272 and 273.

[0043] The housing 101 further includes rods 277, 278, 279, which are respectively disposed in the receiving grooves 271, 272, 273, 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 at the lower part of the housing 101. The rods 277, 278, 279 form a handle limiter, which can limit the rotation angle of the handle.

[0044] The housing 101 further includes limit blocks 287, 288, 289, which are respectively located in the receiving grooves 271, 272, 273, and the two ends of each limit block are connected to the opposite sides of the adjacent support block. The limit 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 grooves 292 and holes, and the groove 292 is provided with a protrusion 293, which is arranged toward a side wall 294 of the groove 292. The protrusion 293 and the side wall 294 of the groove 292 together form a locking and matching reset member installation portion 295.

[0046] Figure 3 yes Figure 1B A three-dimensional view of a valve core. Figure 1B The valve cores 121, 122, and 123 have the same structure. Figure 3 The structure of the valve core is described by taking the valve core 121 as an example. Figure 3As shown, the valve core 121 includes a front section 311, a middle section 312 and a rear section 313. Among them, the diameter of the middle section 312 is larger 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 in the radial direction and penetrating the middle section, and the through hole 366 can be aligned with the branch channel 211. The outer side of the middle section 312 is provided with sealing ring installation grooves 334 and 335 for installing the sealing ring. The diameter of the middle section 312 matches the size of the valve core channel 216, so that the middle section 312 can move in the valve core channel 216, and the sealing ring sleeved on the middle section 312 can form a seal with the inner wall of the valve core channel 216. The far end of the front section 311 forms a valve core control part 314, which can cooperate with the corresponding handle.

[0047] Figure 4A yes Figure 1B A three-dimensional diagram of the operating part of the control mechanism. Figure 4B yes Figure 4A Exploded view of the operating unit. Figure 4A and Figure 4B As shown, the operating part includes handles 431, 432, 433, handle reset members 441, 442, 443 and an operating part support rod 450. The operating part support rod 450 passes through the support blocks 252 and 253, and its two ends are respectively connected to the support blocks 251 and 254. The operating part support rod 450 is closer to the main body 208 of the housing than the rods 277, 278 and 279.

[0048] The operating part includes handles 431, 432, 433, which are sleeved on the operating part support rod 450 and can rotate relative to the operating part support rod 450. The handle reset members 441, 442, 443 are sleeved on the operating part support rod 450 and are arranged between the handles 431, 432, 433 and the housing.

[0049] Each of the handles 431, 432, 433 includes a first side 481 and a second side 482 arranged opposite to each other, and 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 so that the operating part support rod 450 can pass through, so that the handle reset member can rotate around the operating part support rod 450. A receiving portion 499 is formed between the pair of ears 497 and 498, and the receiving portion 499 can accommodate the corresponding handle reset member. Near the receiving portion 499, the handle has a groove 496 that is recessed from the second side 482 toward the first side 481, which is used to accommodate the lead-out end of the handle reset member. The distal end 492 of the handle is provided with a handle protrusion 495 for the convenience of the operator. In one embodiment of the present 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 is bent and extended toward the distal end 492 in a direction away from the second side 482, and its surface facing the second side 482 forms a curved arc. The handles 431, 432, 433 have handle locking portions 464, 465, and 466, respectively.

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

[0051] Figure 5 yes Figure 1B A three-dimensional view of the locking mating part. Figure 5 As shown, the locking and fitting part 104 includes a connecting shaft 515, matching protrusions 521, 522, 523 and locking and fitting reset parts 541, 542. The connecting shaft 515 is rotatably connected to the housing 101. The connecting shaft 515 passes through the supporting blocks 252 and 253 of the housing 101, and its two ends are respectively located in the grooves 292 of the supporting blocks 251 and 254. The matching protrusions 521, 522 and 523 are fixedly connected to the connecting shaft 515 and can rotate with the connecting shaft 515. The locking and fitting reset parts 541 and 542 are respectively sleeved on the two ends of the connecting shaft 515 and are fixedly connected to the connecting shaft 515. Each of the locking and fitting reset parts 541 and 542 has a pair of lead-out ends 561 and 561. The locking and fitting reset parts 541 and 542 are located in the locking and fitting reset part mounting part 295 of the grooves 292 of the supporting 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] Figure 6 yes Figure 1AA cross-sectional view of the valve seat in FIG. Figure 6 Cut along the height and width of the valve seat, and the cut surface is located in the middle of the length direction of the valve seat. Figure 6 The cross-sectional plane in Fig. 1 passes through the middle of the valve core 122. Figure 6 As shown, the valve core 122 is located in the valve core passage 217 . Figure 6 The branch channel 212 shown in the figure is in an open state, the through hole 366 of the valve core 122 is aligned with the branch channel 211, and the fluid can 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 a position of the branch channel 212 close to the main channel 210. The fluid in the balance channel 255 has a certain pressure, so that the valve core 122 has a tendency 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 surface 286 , and the middle section 312 of the valve core 122 can abut against the valve core stopper 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 limit 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 elastic force to the handle 432, so that it can apply pressure to the valve core 122, so that the valve core 122 has a tendency to move toward the end face 286. In the present application, the elastic force of the handle reset member 422 is set so 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 maintained at the closest position relative to the end face 286, and the branch channel 212 remains open.

[0054] Figure 7 yes Figure 1A The side view of the valve seat in FIG. 1 shows the positional relationship between one end of the locking mating portion 104 and the housing. Figure 7 As shown, the locking fitting reset member 541 of the locking fitting portion 104 is located in the groove 292 of the housing 101. The lead ends 561 and 562 of the locking fitting reset member are respectively abutted between the protrusion 293 and the side wall 294 of the groove 292 and are in a compressed state, so that the locking fitting portion 104 can be maintained in a specific position.

[0055] Figure 8 yes Figure 1A Front view of the middle valve seat, combined with Figure 2A-Figure 8 As shown, the handle 431 leaves the valve core 121, and the through hole of the valve core 121 is staggered with the branch channel 211. The handles 432 and 433 are respectively against the valve cores 122 and 123, and the through holes of the valve cores 122 and 123 are respectively aligned with the branch channels 212 and 213, so that the branch channel 211 is in a closed state, and the branch channels 212 and 213 are in an open state.

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

[0057] Figure 9A-9H The figure shows the switching process of the branch channel connection state of the valve seat. Fig.9A and Fig. 9B As shown, at this time, the branch channel 211 is in a closed state and the branch channel 212 is in an open state. The handle 431 is in a position away from the valve core 121. The handle locking portion 464 of the handle 431 is located below the matching protrusion 521, so that the handle 431 is locked by the locking matching portion 104 and cannot move toward the valve core 121. The fluid in the balance channel 255 applies pressure to the valve core 121, so that the valve core 121 moves to the position farthest from the end surface 286 of the valve core channel. The through hole 366 of the valve core 121 is staggered from the branch channel 211, and the branch channel 211 is closed by the middle section 312 of the valve core 121. The branch channel 211 is disconnected from the main channel 210, so that the branch channel 211 is in a closed state.

[0058] At this time, both branch channels 212 and 213 are in an open state. Fig. 9BThe state of the branch channel 212 is shown. The handle reset member 442 applies elastic force to the handle 432, so that the handle 432 keeps the valve core 122 at the position closest to the end surface of the valve core channel 217, the through hole of the valve core 122 is aligned with the branch channel 212, and the fluid can flow through the through hole of the valve core 122 to the branch channel opening 243. The branch channel 213 is in the same state as the branch channel 212.

[0059] In some applications, it is necessary to close one of the opened branch channels and open the branch channel that is currently closed. Figures 9C-9H The process shown is to open the branch channel 211 and close the branch channel 212 at the same time.

[0060] like Fig.9D As shown, when the branch channel 212 needs to be closed, force is applied to the handle 432 to rotate it in a direction away from the valve core 122. The handle locking portion 465 of the handle 432 moves toward the mating protrusion 522 until it contacts the mating protrusion 522 and is located above the mating protrusion 522. At this time, under the operation of the fluid pressure in the balance channel 255, the valve core 122 will move in a direction away from the end face of the valve core channel. Fig. 9C As shown, the state of the branch channel 211 remains unchanged and is still in a closed state.

[0061] like Fig.9F As shown, in Fig.9D If force is continued to be applied to the handle 432 in the state shown, the handle locking portion 465 of the handle 432 applies pressure to the mating protrusion 522, causing it to rotate around the axis of the connecting shaft 515, and the handle locking portion 465 can pass over the mating protrusion 522 and thus be located below the mating protrusion 522. The rod 278 can limit the maximum distance that the handle 432 can rotate in the direction away from the valve core 122. The valve core 122 moves in the direction away from the end face of the valve core channel and reaches the farthest position. The through hole of the valve core 122 is offset from the branch channel 212, and the branch channel 212 is closed. The mating protrusion 522 returns to the position as shown in the figure under the action of the locking mating reset members 541 and 542. Fig. 9B Initial position shown.

[0062] like Fig.9EAs shown, when the handle locking portion 465 pushes the matching protrusion 522 to rotate, since the matching protrusion 522 is fixedly connected to the connecting shaft 515, the connecting shaft 515 will rotate together with the matching protrusion 522, and at the same time, the matching protrusion 521 rotates together with the connecting shaft 515. The handle locking portion 465 that can pass over the handle 431 reaches the bottom of 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 toward the valve core 121, and after contacting the valve core control portion 314, it pushes the valve core 121 to move to the closest position toward the end surface of the valve core channel. The through hole of the valve core 121 is aligned with the branch channel 212, so that the branch channel 212 is opened.

[0063] like Figure 9H As shown, when the external force applied to the handle 432 is removed, the handle reset member 442 pushes the handle 432 to rotate toward the valve core 122. The handle locking portion 465 contacts the mating protrusion 522 and is located below the mating protrusion 522. The mating protrusion 522 restricts the handle 432 from further rotating toward the valve core 122, so that the handle 432 is locked. The valve core 122 remains in a closed state. In this process, the state of the handle 431 remains unchanged, and the branch channel 211 remains in an open state.

[0064] exist Figure 9A-9H During the process, branch channel 212 is closed, while branch channel 211 is opened, and branch channel 213 remains unchanged. Similarly, if branch channel 213 is closed, branch channel 211 can also be opened at the same time, and branch channel 212 remains unchanged. In the valve seat application of the present application, one branch channel is kept in a closed state, and the other branch channels are kept in an open state. When it is necessary to close any one of the branch channels in an open state, by operating the corresponding handle, the branch channel that was previously closed can be opened while the branch channel is closed.

[0065] In one application of the present application, the valve seat is used to be connected to a pressure vessel, and its main channel is connected to the pressure vessel, and each branch channel is connected to a safety valve. When one of the safety valves needs to be inspected and modified, the corresponding branch channel is closed, and the previously closed branch channel is opened. This allows the displacement of the safety valve to always meet the requirements. The valve seat in the present application can be provided with multiple branch channels to connect multiple safety valves with smaller displacements. To use the valve seat in the present application, it is only necessary for the total displacement of multiple safety valves to meet the requirements, and a single safety valve with a smaller displacement can be selected.

[0066] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, variations, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent to those of ordinary skill in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosure in this specification may be used to solve other technical problems and have other technical effects. Therefore, the examples of the embodiments of the present disclosure set out above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, variations, improvements and / or substantially equivalent solutions.

Claims

1. A valve seat, characterized in that include: A housing (101), the housing (101) comprising a main channel (210) and a plurality of branch channels (211, 212, 213), the plurality of branch channels (211, 212, 213) being in communication with the main channel (210); A plurality of valve cores (121, 122, 123), each of the valve cores (121, 122, 123) being arranged in the housing (101) and being movable relative to a corresponding branch channel (211, 212, 213) to open or close the corresponding branch channel (211, 212, 213); a control mechanism (150), wherein the control mechanism (150) is capable of controlling the movement of the plurality of valve cores (121, 122, 123) to close at least one of the plurality of branch channels (211, 212, 213); The valve seat is configured to close one of the multiple branch channels (211, 212, 213) and open the other channels, and the control mechanism (150) is configured to open a branch channel in a closed state while closing any one of the multiple branch channels (211, 212, 213) in an open state.

2. The valve seat according to claim 1, characterized in that: Each of the plurality of valve cores (121, 122, 123) comprises a valve core control portion (314) protruding from the housing (101), and the valve core control portion (314) is capable of contacting the control mechanism (150) and moving in the branch channels (211, 212, 213) under the push of the control mechanism (150); The valve seat further comprises a plurality of valve core retaining portions, which are configured to apply force to the valve cores (121, 122, 123) so as to keep the valve cores (121, 122, 123) at a position closing the corresponding branch channels (211, 212, 213).

3. The valve seat according to claim 2, characterized in that: The control mechanism (150) includes an operating part, which includes a plurality of handles (431, 432, 433) and a plurality of handle reset members (441, 442, 443), wherein the handles (431, 432, 433) are configured to be rotatable relative to the housing (101) to contact or leave the valve core (121, 122, 123), and the handle reset members (441, 442, 443) are configured to apply force to the handles (431, 432, 433) to overcome the force of the valve core retaining part acting on the valve core (121, 122, 123), so that the handles (431, 432, 433) contact the valve core control part (314) and maintain the valve core (121, 122, 123) in a position to open the corresponding branch channels (211, 212, 213).

4. The valve seat according to claim 3, characterized in that: The control mechanism further comprises a locking matching portion (104), each of the plurality of handles (431, 432, 433) comprises a handle locking portion (464, 465, 466), and the control mechanism (150) is configured such that the handle locking portion (464, 465, 466) of each handle (431, 432, 433) cooperates with the locking matching portion (104) to lock or unlock the corresponding handle (431, 432, 433); When the handle (431, 432, 433) is locked, the handle (431, 432, 433) leaves the corresponding valve core (121, 122, 123), and the corresponding branch channel (211, 212, 213) is closed; when the handle is unlocked, the handle contacts the corresponding valve core (121, 122, 123), and the corresponding branch channel (211, 212, 213) is opened.

5. The valve seat according to claim 4, characterized in that: The locking fitting portion (104) is configured to be rotatable between a first position and a second position relative to the housing (101); in the direction from the first position to the second position, the handle locking portion (464, 465, 466) pushes the locking fitting portion (104) to rotate so that the handle locking portion (464, 465, 466) cooperates with the locking fitting portion (104) to reach a locking position; the locking fitting portion (104) pushes the handle locking portion (464, 465, 466) to drive the handle (431, 432, 433) to rotate so that the handle locking portion (464, 465, 466) is unlocked from the locking fitting portion (104).

6. The valve seat according to claim 4, characterized in that: The locking mating portion (104) comprises a connecting shaft (515) and a plurality of mating protrusions (521), wherein the mating protrusions (521) are fixedly connected to the connecting shaft (515), and the mating protrusions (521) extend toward the outer surface of one side of the handle; The handle (431, 432, 433) comprises a first side (481) and a second side (482) arranged opposite to each other, the first side (481) is capable of contacting the valve core (121, 122, 123), the handle locking portion (466) extends from the second side (482) and bends and extends toward the distal end of the handle (431, 432, 433), and the handle locking portion (466) extends toward the outer surface away from the second side (482); When any one of the handle locking parts (466) pushes the corresponding matching protrusion (523) to move, the corresponding matching protrusion (521) of the other locked handle pushes the corresponding handle locking part (464) to move, so that when any one handle is locked, the other locked handle is unlocked.

7. The valve seat according to claim 3, characterized in that: The valve seat comprises a plurality of valve core channels (216, 217, 218), the extension direction of the valve core channels (216, 217, 218) and the corresponding branch channels (211, 212, 213) have a certain angle, and the valve cores (121, 122, 123) are arranged in the valve core channels (216, 217, 218) and can move relative to the valve core channels (216, 217, 218); The valve core retaining portion comprises a balancing channel (255), and two ends of the balancing channel (255) are respectively connected to the valve core channels (216, 217, 218) and the main channel (210).

8. The valve seat according to claim 3, characterized in that: The valve seat further comprises a handle limiting portion, wherein the handle limiting portion is configured to limit a rotation angle of the handle (431, 432, 433) in a direction away from the valve core (121, 122, 123).

9. The valve seat according to claim 4, characterized in that: The locking fitting portion (104) further includes a locking fitting reset member (541), and the valve seat further includes a locking fitting reset member mounting portion (295). The locking fitting reset member (541) is disposed in the locking fitting reset member mounting portion (295) and is configured to enable the locking fitting portion (104) to return to the first position.

10. The valve seat according to claim 1, characterized in that: The main channel (210) is connected to a pressure device, and each of the plurality of branch channels (211, 212, 213) is connected to a safety valve.

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