Integrated double-channel stop valve

Abstract

The invention discloses an integrated double-channel stop valve, and belongs to the technical field of valves.The stop valve comprises a stop valve body, a pressure release valve is arranged on the stop valve body, the upper end of the stop valve body is detachably connected with a mounting cover, the mounting cover is in threaded connection with a threaded rod, and the top of the threaded rod is detachably connected with a first hand wheel; the end of the threaded rod is inserted into the stop valve body, a sealing table is arranged in the stop valve body, a valve clack assembly is arranged at the inserting end of the threaded rod, when the valve is closed, the first hand wheel drives the grating barrel and the grating ring body to move downwards, the outer wall of the grating barrel is attached to the upper end of the sealing table, and at the moment, water flow can flow through a gap; when the valve is closed, upward reverse thrust borne by the valve clack is small, then the second hand wheel is rotated to enable gaps between the grating ring body and the grating barrel to be gradually staggered, the circulation section is gently shrunk, the medium flow speed and pressure change are uniform, instant high-pressure backflushing cannot be formed, and resistance generated when the valve is closed can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, specifically, it relates to an integrated dual-channel shut-off valve. Background Technology

[0002] A gate valve is a commonly used fluid control valve, mainly used to cut off or regulate the medium in a pipeline. The closing principle of a gate valve is that the valve stem pressure causes the valve disc sealing surface to fit tightly against the valve seat sealing surface, preventing the flow of the medium. In traditional technology, gate valves and pressure relief valves are usually installed independently, requiring additional pipelines for connection. This not only results in low integration, but also because gate valves are typically used for cutting off and controlling downstream equipment.

[0003] CN120701758A discloses an integrated dual-channel shut-off valve, comprising a main valve body and an inlet bottom chamber and an outlet top chamber located inside the main valve body. A valve seat ring is provided between the inlet bottom chamber and the outlet top chamber, and a valve core disc is provided outside the valve seat ring. Through the axial movement of the valve core disc, the valve core disc and the valve seat ring are engaged in opening and closing, thereby realizing the shut-off and flow control of the shut-off valve. The integrated dual-channel shut-off valve of this invention can realize integrated pressure relief protection. Through the added secondary channel, fluid pressure relief can be carried out when the pressure is too high, improving safety and increasing the degree of integration.

[0004] Although the valve can relieve pressure, during the closing process, the medium in the pipeline below the valve disc exerts upward pressure on the valve disc. As the valve disc moves downward, the cross-sectional area of ​​the medium flow continuously shrinks, and the medium velocity and pressure distribution change. The upward reaction force gradually increases, making the resistance of the handwheel increasingly greater, resulting in the valve being extremely difficult to close. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the problem mentioned in the background art that during the closing process of a stop valve, the medium in the pipeline below the valve disc exerts upward pressure on the valve disc, and as the valve disc moves downward, the cross-sectional area of ​​the medium flow continuously shrinks, the medium flow velocity and pressure distribution change, and the upward reaction force gradually increases, making the resistance of the handwheel increasingly greater and causing the stop valve to be extremely difficult to close, the present invention adopts the following technical solution.

[0007] An integrated dual-channel shut-off valve includes a shut-off valve body with a pressure relief valve. A mounting cover is detachably connected to the upper end of the shut-off valve body, and a threaded rod is threadedly connected to the mounting cover. A first handwheel is detachably connected to the top of the threaded rod. The end of the threaded rod is inserted into the interior of the shut-off valve body. A sealing platform is provided inside the shut-off valve body, and a valve disc assembly is provided at the insertion end of the threaded rod. The valve disc assembly cooperates with the sealing platform to achieve closure. When the valve disc assembly is closed, the flow cross-section is slowly reduced.

[0008] In the above technical solution, when the valve disc assembly is closed, the flow cross section is gradually reduced, the medium flow rate and pressure change uniformly, and no instantaneous high pressure backflow is formed, thus reducing the resistance when the valve is closed.

[0009] Based on this, the valve disc assembly includes a grille cylinder and a grille ring body. The grille ring body is rotatably connected to the inside of the grille cylinder. The bottom of the grille cylinder is detachably connected to the threaded rod. The top of the grille ring body is detachably connected to a transmission rod that passes through the threaded rod. The upper end of the transmission rod is detachably connected to a second handwheel. Rotating the first handwheel causes the threaded rod to drive the grille cylinder and the grille ring body to move downwards. The outer wall of the grille cylinder fits against the inner wall of the sealing platform. Rotating the second handwheel causes the gap between the grille ring body and the grille cylinder to be misaligned, and the overlapping area of ​​the gap gradually decreases.

[0010] In the above technical solution, by cooperating with the grid structure of the grid cylinder and the grid ring, solid impurities in the medium can be intercepted during the sealing process, so as to avoid impurities from blocking the valve disc assembly and preventing impurities from entering and causing the valve disc assembly to fail to close tightly.

[0011] Based on this, the inner wall of the grid cylinder is provided with multiple sealing slots, and the outer wall of the grid ring is fixedly connected with multiple sealing teeth. The sealing teeth are slidably connected to the inside of the sealing slots, and the sealing teeth slide laterally inside the sealing slots when the grid ring rotates.

[0012] In the above technical solution, inserting the sealing tooth block into the sealing slot can increase the sealing performance between the grid cylinder and the grid ring.

[0013] Based on this, the upper end of the threaded rod is provided with an arc-shaped groove, the outer wall of the transmission rod is fixedly connected with a first limiting block, the first limiting block is slidably connected to the inside of the arc-shaped groove, the upper end of the first limiting block is provided with an insertion groove, the inside of the arc-shaped groove is slidably connected with an arc-shaped insertion block, and the bottom of the arc-shaped insertion block is fixedly connected with a positioning insertion block.

[0014] In the above technical solution, when the valve needs to be closed, the actuating plate fixedly connected to the arc-shaped insert block is moved upward, causing the arc-shaped insert block to move upward. At this time, the second handwheel is turned, and the first limit block slides to the other side of the arc-shaped groove, causing the actuating plate to move downward and the positioning insert block to be inserted into the insertion groove, thereby fixing the position of the grid ring body in the state of valve opening or closing.

[0015] Based on this, rubber layers are provided on both sides of the outer side of the sealing tooth block, and a sealing ring is provided at the bottom of the grid cylinder.

[0016] In the above technical solution, the sealing performance between the grid cylinder and the grid ring can be increased by the contact between the rubber layer and the inner wall of the sealing slot, and by the insertion of the sealing tooth block into the interior of the sealing slot.

[0017] In another technical solution, the valve disc assembly includes a grid cylinder and a sealing ring body. The sealing ring body is internally telescopically connected to the grid cylinder. The bottom of the sealing ring body contacts the upper end of the sealing platform. After the grid cylinder moves downward and overlaps with the sealing ring body, the valve is closed.

[0018] Based on this, turning the first handwheel causes the threaded rod to move downward, which in turn drives the grid cylinder to move downward synchronously. The grid cylinder pushes the sealing ring body downward and contacts the upper end of the sealing platform. The sealing ring body is limited by the sealing platform and no longer moves downward. As the first handwheel continues to rotate, the grid cylinder slides down along the outer wall of the sealing ring and slowly merges with the sealing ring body.

[0019] Based on this, the inner wall of the grid cylinder is provided with multiple sealing slots, and the outer wall of the sealing ring is provided with multiple sealing teeth, which are slidably connected to the inside of the sealing slots.

[0020] In the above technical solution, the sliding engagement between the sealing tooth block and the sealing slot can provide precise guidance for the extension and retraction of the sealing ring.

[0021] Based on this, an extension component is installed on the sealing ring body, which allows the sealing ring body to remain in an extended state when the valve is opened.

[0022] Based on this, the extended component includes a connecting plate, which is fixedly connected to the inner wall of the sealing ring near the bottom. A sliding rod is fixedly connected to the upper end of the connecting plate. The sliding rod passes through the grid cylinder and is inserted into the threaded rod. A return spring is fixedly connected to the insertion end of the sliding rod. The other end of the return spring is fixedly connected to the inner wall of the threaded rod. A plurality of second limiting blocks are fixedly connected to the outer wall of the sliding rod. The second limiting blocks are slidably connected to the threaded rod.

[0023] In the above technical solution, the elastic support of the reset spring enables the sealing ring to remain in an outwardly extended state when the valve is open.

[0024] Based on this, a sealing ring is provided on the inner wall of the grid cylinder, and a sealing ring is also provided at the bottom of the sealing ring body.

[0025] In the above technical solution, the sealing ring can improve the sealing performance after the sealing ring body and the grid cylinder overlap, thus preventing water leakage.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. In this invention, when the valve is closed, the first handwheel drives the grid cylinder and grid ring body downwards, so that the outer wall of the grid cylinder fits against the upper end of the sealing platform. At this time, water can flow through the gap, and the upward thrust on the valve disc is small. Then, the second handwheel is rotated to gradually offset the gap between the grid ring body and the grid cylinder, and the flow cross section shrinks gently. The medium flow rate and pressure change are uniform, and no instantaneous high pressure backflow is formed, which can reduce the resistance when closing the valve. The grid structure of the grid cylinder and the grid ring body cooperate with each other to intercept impurities in the medium during the sealing process, preventing the valve disc assembly from failing to close due to the influence of impurities.

[0028] 2. In this invention, when the valve is closed, the sealing ring first contacts and is restricted by the sealing platform. The grid cylinder slowly slides down and overlaps with the outer wall of the sealing ring, and the flow section shrinks gently. The medium flow rate and pressure change are uniform, and there will be no instantaneous high pressure backflow. At the same time, the resistance when closing the valve is greatly reduced. The return spring ensures that the sealing ring can maintain an outward extension when the valve is open, avoiding the sealing ring from retracting into the grid cylinder due to the upward thrust of the water flow. This ensures that the sealing ring can slowly overlap with the grid cylinder when the valve is closed, further reducing the closing resistance. At the same time, the second limiting block can prevent the sliding rod from deflecting when it moves. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an integrated dual-channel shut-off valve structure according to the present invention;

[0030] Figure 2 This is a cross-sectional view of the integrated dual-channel shut-off valve in this invention.

[0031] Figure 3 This is a schematic diagram of the valve disc assembly structure in Embodiment 1 of the present invention;

[0032] Figure 4 This is a schematic diagram of the valve disc assembly structure in this invention;

[0033] Figure 5 In this invention Figure 4 Enlarged structural diagram of section A;

[0034] Figure 6 This is a schematic diagram of the limiting component structure in this invention;

[0035] Figure 7 This is a schematic diagram of the valve disc assembly structure in Embodiment 2 of the present invention;

[0036] Figure 8 This is a schematic diagram of the valve disc assembly structure in this invention;

[0037] Figure 9 In this invention Figure 8 Enlarged structural diagram of section B.

[0038] The correspondence between the labels and component names in the attached figures is as follows:

[0039] 100. Shut-off valve body; 101. First handwheel; 102. Pressure relief valve; 103. Threaded rod; 104. Mounting cover; 105. Arc groove; 106. Sealing platform;

[0040] 200. Second handwheel; 201. Grille cylinder; 202. Grille ring body; 203. Transmission rod; 204. Sealing tooth block; 205. Sealing slot; 206. Insertion groove; 207. First limiting block; 208. Sliding rod; 209. Return spring; 210. Second limiting block; 211. Sealing ring body;

[0041] 300. Toggle plate; 301. Arc-shaped insert; 302. Positioning insert. Detailed Implementation

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0045] Example 1

[0046] like Figure 1The diagram shows a preferred embodiment of an integrated dual-channel shut-off valve of the present invention. The integrated dual-channel shut-off valve of this embodiment includes a shut-off valve body 100, a pressure relief valve 102 mounted on the shut-off valve body 100, a mounting cover 104 detachably connected to the upper end of the shut-off valve body 100, a threaded rod 103 threadedly connected to the mounting cover 104, a first handwheel 101 detachably connected to the top of the threaded rod 103, an end of the threaded rod 103 inserted into the interior of the shut-off valve body 100, a valve disc assembly mounted at the insertion end of the threaded rod 103, and a sealing platform 106 mounted inside the shut-off valve body 100. The valve disc assembly cooperates with the sealing platform 106 to achieve closure. In this embodiment, rotating the first handwheel 101 drives the valve disc assembly to move, thereby enabling the opening and closing of the shut-off valve body 100.

[0047] The specific structure of the valve disc assembly can be as follows: Figure 2 In the illustrated embodiment, the valve assembly includes a grille cylinder 201 and a grille ring 202. The grille ring 202 is rotatably connected to the inside of the grille cylinder 201. The grille cylinder 201 is detachably connected to the bottom of the threaded rod 103. A transmission rod 203 passing through the threaded rod 103 is detachably connected to the top of the grille ring 202. A second handwheel 200 is detachably connected to the upper end of the transmission rod 203. A sealing ring is provided at the bottom of the grille cylinder 201. In this embodiment, when it is necessary to close the valve, the first handwheel 101 is first rotated, causing the threaded rod 103 to drive the grille cylinder 201 and the grille ring 202 to move downwards. The outer wall of the grille cylinder 201... When the screen is in contact with the inner wall of the sealing platform 106, the water inside will pass through the gap between the screen cylinder 201 and the screen ring 202. At this time, the valve disc is subjected to a small upward thrust. Then, by rotating the second handwheel 200, the gap between the screen ring 202 and the screen cylinder 201 is staggered, the overlapping area of ​​the gap gradually decreases, the flow cross section shrinks gently, and the medium flow rate and pressure change uniformly, without forming an instantaneous high-pressure backflow. Through the grid structure cooperation of the screen cylinder 201 and the screen ring 202, solid impurities in the medium can also be intercepted during the sealing process, preventing impurities from blocking the valve disc assembly and preventing impurities from entering and causing the valve disc assembly to fail to close tightly.

[0048] To achieve a better sealing effect between the grille cylinder 201 and the grille ring 202, the specific structure can be as follows: Figure 3In the illustrated embodiment, the inner wall of the grid cylinder 201 is provided with a plurality of sealing slots 205, and the outer wall of the grid ring 202 is fixedly connected with a plurality of sealing teeth 204. The sealing teeth 204 are slidably connected to the inside of the sealing slots 205, and rubber layers are provided on both sides of the outer side of the sealing teeth 204. When the grid ring 202 rotates, the sealing teeth 204 slide laterally inside the sealing slots 205. In this embodiment, the contact between the rubber layers and the inner wall of the sealing slots 205, and the insertion of the sealing teeth 204 into the inside of the sealing slots 205, can increase the sealing performance between the grid cylinder 201 and the grid ring 202, making the sealing performance better after the gap between the grid ring 202 and the grid cylinder 201 is staggered.

[0049] Since the transmission rod 203 passes through and rotatably connects to the threaded rod 103, the positions of the grille ring 202 and the second handwheel 200 need to be fixed during valve closing to prevent accidental valve opening. Specific fixing components can be used as follows: Figure 4-6 In the embodiment shown, the upper end of the threaded rod 103 is provided with an arc-shaped groove 105. A first limiting block 207 is fixedly connected to the outer wall of the transmission rod 203. The first limiting block 207 is slidably connected to the inside of the arc-shaped groove 105. The upper end of the first limiting block 207 is provided with an insertion groove 206. An arc-shaped insert 301 is slidably connected to the inside of the arc-shaped groove 105. A positioning insert 302 is fixedly connected to the bottom of the arc-shaped insert 301. In this embodiment, when the valve is open, the first limiting block 207 is located inside the arc-shaped groove 105. On the other side, the arc-shaped insert 301 fills the space on the other side of the arc-shaped groove 105. When the valve needs to be closed, the actuating plate 300, which is fixedly connected to the arc-shaped insert 301, moves upward, causing the arc-shaped insert 301 to move upward. At this time, the second handwheel 200 is turned, and the first limiting block 207 slides to the other side of the arc-shaped groove 105, causing the actuating plate 300 to move downward. The positioning insert 302 is inserted into the insertion groove 206, thereby fixing the position of the grid ring 202 in the state of valve opening or closing.

[0050] Example 2

[0051] like Figure 7As shown, this is another preferred embodiment of the present invention. The difference between this embodiment and the first embodiment is that the valve disc assembly includes a grille cylinder 201 and a sealing ring 211. The sealing ring 211 is internally telescopically connected to the grille cylinder 201. The bottom of the sealing ring 211 contacts the upper end of the sealing platform 106. After the grille cylinder 201 moves downward and overlaps with the sealing ring 211, the valve is closed. In this embodiment, rotating the first handwheel 101 causes the threaded rod 103 to move downward, thereby driving the grille cylinder 201 to move downward synchronously. The grille cylinder 201 pushes the sealing ring 211 downward and contacts the upper end of the sealing platform 106. 1. The sealing platform 106 stops moving downwards; as the first handwheel 101 continues to rotate, the grille cylinder 201 slides down along the outer wall of the sealing ring 211 and slowly overlaps with the sealing ring 211. At this time, the water inside the shut-off valve body 100 will flow through the inside of the sealing ring 211 and out from the slot of the grille cylinder 201. At this time, the valve disc is subjected to a small upward thrust, the flow cross section shrinks gently, and the medium flow rate and pressure change uniformly, without forming an instantaneous high-pressure backflow. After the grille cylinder 201 and the sealing ring 211 overlap, the slot on the grille cylinder 201 is closed, thereby completing the action of closing the valve, which can reduce the resistance when closing the valve.

[0052] To prevent water leakage after the grille cylinder 201 overlaps with the sealing ring 211, a specific sealing structure can be adopted as follows: Figure 8 In the embodiment shown, the inner wall of the grid cylinder 201 is provided with a plurality of sealing slots 205, and the outer wall of the sealing ring body 211 is provided with a plurality of sealing teeth 204. The sealing teeth 204 are slidably connected to the inside of the sealing slots 205. The inner wall of the grid cylinder 201 is provided with a sealing ring, and the bottom of the sealing ring body 211 is also provided with a sealing ring. In this embodiment, the sliding cooperation between the sealing teeth 204 and the sealing slots 205 can accurately guide the extension and retraction of the sealing ring body 211. The sealing ring can make the sealing performance better after the sealing ring body 211 overlaps with the grid cylinder 201, thus preventing water leakage.

[0053] When the valve is opened, the water generates an upward thrust, which can easily cause the sealing ring 211 to retract into the interior of the grid cylinder 201, resulting in increased resistance when the valve is closed. To ensure that the sealing ring 211 remains extended outward when the valve is open, in this embodiment, a connecting plate is fixedly connected to the inner wall of the sealing ring 211 near its bottom. A sliding rod 208 is fixedly connected to the upper end of the connecting plate. The sliding rod 208 passes through the grid cylinder 201 and is inserted into the threaded rod 103. A return spring 209 is fixedly connected to the insertion end of the sliding rod 208. The other end of the return spring 209 is fixedly connected to the inner wall of the threaded rod 103. The outer end of the sliding rod 208... Multiple second limiting blocks 210 are fixedly connected to the wall. The second limiting blocks 210 are slidably connected to the threaded rod 103. In this embodiment, through the elastic support of the return spring 209, the sealing ring 211 can be kept in an outwardly extended state when the valve is open. Then, when the valve is closed, the sealing ring 211 slowly overlaps with the grid cylinder 201, thereby reducing the resistance to closing the valve and making the medium flow rate and pressure change uniform, without forming instantaneous high pressure backflow. The second limiting block 210 is slidably connected to the threaded rod 103, which can prevent the sliding rod 208 from deflecting during movement and ensure the stability of the elastic support direction of the return spring 209.

[0054] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. An integrated dual-channel shut-off valve, comprising a shut-off valve body (100), a pressure relief valve (102) disposed on the shut-off valve body (100), a mounting cover (104) detachably connected to the upper end of the shut-off valve body (100), a threaded rod (103) threadedly connected to the mounting cover (104), a first handwheel (101) detachably connected to the top of the threaded rod (103), and an end of the threaded rod (103) inserted into the interior of the shut-off valve body (100), characterized in that, The valve body (100) is provided with a sealing platform (106) inside, and a valve disc assembly is provided at the insertion end of the threaded rod (103). The valve disc assembly cooperates with the sealing platform (106) to achieve closure. When the valve disc assembly is closed, the flow cross section is slowly reduced.

2. The integrated dual-channel shut-off valve according to claim 1, characterized in that, The valve assembly includes a grille cylinder (201) and a grille ring (202). The grille ring (202) is rotatably connected to the inside of the grille cylinder (201). The bottom of the grille cylinder (201) is detachably connected to the threaded rod (103). The top of the grille ring (202) is detachably connected to a transmission rod (203) that passes through the threaded rod (103). The upper end of the transmission rod (203) is detachably connected to a second handwheel (200). Rotating the first handwheel (101) causes the threaded rod (103) to drive the grille cylinder (201) and the grille ring (202) to move downward. The outer wall of the grille cylinder (201) fits against the inner wall of the sealing platform (106). Rotating the second handwheel (200) causes the gap between the grille ring (202) and the grille cylinder (201) to be misaligned, and the overlapping area of ​​the gap gradually decreases.

3. The integrated dual-channel shut-off valve according to claim 2, characterized in that, The inner wall of the grid cylinder (201) is provided with multiple sealing slots (205), and the outer wall of the grid ring (202) is fixedly connected with multiple sealing teeth (204). The sealing teeth (204) are slidably connected to the inside of the sealing slots (205), and the sealing teeth (204) slide laterally inside the sealing slots (205) when the grid ring (202) rotates.

4. The integrated dual-channel shut-off valve according to claim 2, characterized in that, The upper end of the threaded rod (103) is provided with an arc groove (105), and the outer wall of the transmission rod (203) is fixedly connected with a first limiting block (207). The first limiting block (207) is slidably connected to the inside of the arc groove (105). The upper end of the first limiting block (207) is provided with an insertion groove (206), and the inside of the arc groove (105) is slidably connected with an arc plug (301). The bottom of the arc plug (301) is fixedly connected with a positioning plug (302).

5. The integrated dual-channel shut-off valve according to claim 3, characterized in that, Rubber layers are provided on both sides of the sealing tooth block (204), and a sealing ring is provided at the bottom of the grid cylinder (201).

6. The integrated dual-channel shut-off valve according to claim 1, characterized in that, The valve assembly includes a grille cylinder (201) and a sealing ring (211). The sealing ring (211) is internally telescopically connected to the grille cylinder (201). The bottom of the sealing ring (211) contacts the upper end of the sealing platform (106). The grille cylinder (201) moves downward and overlaps with the sealing ring (211) to close the valve.

7. The integrated dual-channel shut-off valve according to claim 6, characterized in that, The inner wall of the grid cylinder (201) is provided with multiple sealing slots (205), and the outer wall of the sealing ring body (211) is provided with multiple sealing teeth (204). The sealing teeth (204) are slidably connected to the inside of the sealing slots (205).

8. The integrated dual-channel shut-off valve according to claim 6, characterized in that, An extension assembly is installed on the sealing ring (211) so that the sealing ring (211) remains extended outward when the valve is opened.

9. The integrated dual-channel shut-off valve according to claim 8, characterized in that, The extension assembly includes a connecting plate, which is fixedly connected to the inner wall of the sealing ring (211) near the bottom. A sliding rod (208) is fixedly connected to the upper end of the connecting plate. The sliding rod (208) passes through the grid cylinder (201) and is inserted into the threaded rod (103). A return spring (209) is fixedly connected to the insertion end of the sliding rod (208). The other end of the return spring (209) is fixedly connected to the inner wall of the threaded rod (103). A plurality of second limiting blocks (210) are fixedly connected to the outer wall of the sliding rod (208). The second limiting blocks (210) are slidably connected to the threaded rod (103).

10. The integrated dual-channel shut-off valve according to claim 6, characterized in that, A sealing ring is provided on the inner wall of the grid cylinder (201), and a sealing ring is also provided at the bottom of the sealing ring body (211).

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