Integral two-way stop valve

Abstract

The application relates to the technical field of valves, in particular to an integrated double-channel stop valve, which comprises a main valve body, a liquid inlet bottom cavity and a liquid outlet top cavity arranged in the main valve body, a valve seat ring arranged between the liquid inlet bottom cavity and the liquid outlet top cavity, and a valve core disc arranged outside the valve seat ring; the valve core disc is axially movable, so that the valve core disc and the valve seat ring are in open-close cooperation, thereby realizing the stop and flow control of the stop valve; the integrated double-channel stop valve can realize integrated pressure relief protection; through the added secondary channel, fluid can be discharged when the pressure is too high, so that the safety is improved and the integration degree is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to an integrated double-channel stop valve. BACKGROUND

[0002] The stop valve is a commonly used fluid control valve, mainly used for cutting off or adjusting the medium in the pipeline. The closing principle of the stop valve is that the valve stem pressure makes the valve disc sealing surface and the valve seat sealing surface tightly fit to prevent the medium from flowing. In the traditional technology, the stop valve and the pressure relief valve are usually independently arranged, and a pipeline needs to be added for connection. Not only is the integration degree low, but also since the stop valve is usually used for cutting off control of the downstream equipment, the setting threshold of the pressure relief valve is usually low when the stop valve starts to take care of the lowest pressure-resistant equipment in the downstream equipment. However, when the stop valve is closed, the pressure-resistant threshold is usually increased because the downstream equipment is cut off. The traditional technology cannot automatically adjust the threshold of the pressure relief valve according to the action of the stop valve due to the split design of the stop valve and the pressure relief valve. When the stop valve is closed, the pressure relief valve loses the pressure-resistant protection of the stop valve and the pipeline upstream of the stop valve. In order to achieve the pressure-resistant protection of the stop valve and the pipeline upstream of the stop valve, the pressure relief valves and the connecting pipelines need to be arranged on both sides of the stop valve, which greatly increases the cost and the space occupation, especially the space occupation, which is a hard limit in some working conditions. SUMMARY

[0003] The purpose of the present application is to provide an integrated double-channel stop valve to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an integrated double-channel stop valve, comprising a main valve body, a liquid inlet bottom cavity and a liquid outlet top cavity arranged inside the main valve body, a valve seat ring arranged between the liquid inlet bottom cavity and the liquid outlet top cavity, a valve core disc arranged outside the valve seat ring, and an axial movement of the valve core disc to realize the opening and closing cooperation between the valve core disc and the valve seat ring, thereby realizing the stop and flow control of the stop valve.

[0005] A secondary channel is arranged at the bottom of the liquid inlet bottom cavity, a pressure relief plug is arranged in the secondary channel, and the secondary channel and the pressure relief plug are in sealing contact. The pressure relief plug is closed by the pressure relief plug, and when the internal pressure of the liquid inlet bottom cavity exceeds the set threshold, the pressure relief plug is driven to open.

[0006] The internal pressure of the liquid inlet bottom cavity is also provided with a threshold lifting assembly. When the valve core disc and the valve seat ring are in sealing contact and closed, the threshold lifting assembly can increase the trigger threshold of the pressure relief plug driven to open by the pressure.

[0007] A valve body protrusion is fixedly arranged at the bottom of the main valve body, a pressure applying cavity is arranged in the valve body protrusion, and the pressure applying cavity and the secondary channel are in communication with each other.

[0008] The inside of the pressure cavity is provided with a plug column disc, the end of the pressure relief plug is fixedly installed with the plug column disc, the surface of the plug column disc is provided with a medium through hole, and the fluid on the upper and lower sides of the plug column disc flows through the medium through hole.

[0009] The lower side of the plug column disc is provided with a pressure regulating spring, the plug column disc is provided with an elastic pressure by the pressure regulating spring, and the pressure relief plug has an elastic tendency to move into the secondary channel.

[0010] The bottom of the pressure cavity is provided with a cylindrical blind groove, the cylindrical blind groove is provided with a sealing adjusting column, the cylindrical blind groove and the sealing adjusting column are in sealing contact, the sealing adjusting column is provided with a positioning groove, and the end of the pressure regulating spring is limitingly installed in the inside of the positioning groove.

[0011] The sealing adjusting column is fixedly installed with an adjusting bolt, the adjusting bolt penetrates through the bottom of the cylindrical blind groove and is in screw cooperation with the bottom of the cylindrical blind groove, and the axial position distance of the sealing adjusting column in the cylindrical blind groove can be changed by rotating the adjusting bolt.

[0012] The outside of the valve body convex part is provided with an output flow pipe, and the output flow pipe is in communication with the inside of the pressure cavity.

[0013] The threshold value lifting assembly comprises a threshold value lifting rod and a limiting end disc, one end of the threshold value lifting rod is fixedly installed with the pressure relief plug, and the other end of the threshold value lifting rod is fixedly installed with the limiting end disc.

[0014] The outside of the threshold value lifting rod is provided with a limiting fork frame, the limiting fork frame can be clamped on the outside of the threshold value lifting rod by horizontal movement, and the limiting fork frame cooperates with the limiting end disc to axially limit the threshold value lifting rod.

[0015] One side of the limiting fork frame is fixedly provided with a fork frame ring sleeve, a fixed vertical shaft is penetratingly arranged in the fork frame ring sleeve, the fixed vertical shaft is arranged in parallel with the threshold value lifting rod, the bottom of the fixed vertical shaft is fixedly provided with a sliding support bottom piece, a threshold value lifting spring is arranged between the sliding support bottom piece and the fork frame ring sleeve, and the fork frame ring sleeve is provided with an upward supporting elastic force by the threshold value lifting spring.

[0016] The sliding support bottom piece is penetratingly provided with a track sliding rod, the track sliding rod is perpendicular to the fixed vertical shaft, a driving spring is sleeved on the outside of the track sliding rod, the driving spring applies an elastic pressure to the sliding support bottom piece, so that the limiting fork frame has an elastic tendency to move away from the direction of the threshold value lifting rod, and the inside of the liquid inlet bottom cavity is also provided with a mounting ring piece, the track sliding rod is fixedly installed with the mounting ring piece, and the mounting ring piece is fixed in the inside lower surface position of the liquid inlet bottom cavity by screws.

[0017] The upper end of the fixed vertical shaft is fixedly provided with a anti-disengagement end plate, the fork frame ring is limited through the anti-disengagement end plate, and the anti-disengagement end plate is fixedly provided with a triangular inclined block;

[0018] The lower surface of the valve core disc is fixedly provided with a push cover, the push cover is in extrusion contact with the triangular inclined block when the valve core disc is in sealing contact with the valve seat ring and is closed, the push cover cooperates with the guide inclined surface of the triangular inclined block, the limiting fork frame is clamped outside the threshold lifting rod, and then when the threshold lifting rod moves downward, the threshold lifting spring is compressed through the downward pressing of the limiting end plate on the limiting fork frame.

[0019] The valve core shaft is fixedly arranged on the valve core disc, and the threaded portion is arranged on the valve core shaft;

[0020] The valve cover assembly is arranged on the main valve body, the screw sleeve portion is arranged in the valve cover assembly, the threaded portion is screw-coupled with the screw sleeve portion, the valve core disc can be lifted and moved when the valve core shaft rotates, and then the opening and closing control of the stop valve is realized.

[0021] The sealing packing is arranged in the main valve body, the sealing between the main valve body and the valve core shaft is realized through the sealing packing, and the hand wheel is arranged at the end of the valve core shaft, and the rotation control of the valve core shaft is realized through the rotation of the hand wheel.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] The integrated double-channel stop valve can realize integrated pressure relief protection, the fluid can be discharged for pressure relief when the pressure is too high through the added secondary channel, the safety is improved, and the integration degree is improved.

[0024] The threshold lifting assembly cooperates with the valve core disc and other structures, the opening threshold of the secondary channel can be automatically adjusted according to the state of the valve core disc, when the stop valve is opened, the downstream equipment is complex, and the pressure resistance degree is usually reduced, the threshold lifting assembly can reduce the opening threshold of the secondary channel to the initial state. When the stop valve is closed, the downstream equipment is disconnected, at this time, the pressure mainly acts on the stop valve and the upstream pipeline, the pressure resistance degree is improved, the threshold lifting assembly can increase the opening threshold of the secondary channel, so that the probability of overflow of the secondary channel is greatly reduced under the condition of ensuring safety, and dynamic regulation and control are realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic view of the overall structure of the present application.

[0026] Figure 2 It is another angle schematic view of the overall structure of the present application.

[0027] Figure 3 It is a three-dimensional half-section display view of the present application.

[0028] Figure 4 It is a schematic diagram of the partial structure of the embodiment of the present application.

[0029] Figure 5 It is a schematic diagram of the partial structure of the embodiment of the present application.

[0030] Figure 6 It is a schematic diagram of the partial structure of the embodiment of the present application.

[0031] Figure 7 It is a schematic diagram of the partial structure of the embodiment of the present application.

[0032] In the figure: 1, main valve body; 2, liquid inlet bottom cavity; 3, liquid outlet top cavity; 4, valve seat ring; 5, valve core disc; 6, secondary channel; 7, pressure relief plug; 601, valve body protrusion; 602, pressure application cavity; 603, plug column bottom disc; 604, medium through hole; 605, pressure regulating spring; 606, cylindrical blind groove; 607, sealing adjustment column; 608, positioning groove; 609, adjustment bolt; 610, output flow pipe; 701, threshold lifting rod; 702, limiting end disc; 703, limiting fork; 704, fork ring sleeve; 705, fixed vertical shaft; 706, sliding support bottom piece; 707, threshold lifting spring; 708, track sliding rod; 709, driving spring; 710, mounting ring piece; 711, anti-dropping end disc; 712, triangular inclined block; 713, pushing cover; 501, valve core shaft; 502, threaded part; 503, valve cover assembly; 504, threaded sleeve part; 505, sealing packing; 506, hand wheel; 101, fluid inlet; 102, fluid outlet. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Please refer to Figures 1 to 7 The present application provides a technical solution: an integrated double-channel stop valve, which comprises a main valve body 1 and a liquid inlet bottom cavity 2 and a liquid outlet top cavity 3 opened in the main valve body 1, as shown in Figure 3 The two ends of the main valve body 1 are respectively provided with a fluid inlet 101 and a fluid outlet 102, the fluid inlet 101 is communicated with the liquid inlet bottom cavity 2, and the fluid outlet 102 is communicated with the liquid outlet top cavity 3. A valve seat ring 4 is arranged between the liquid inlet bottom cavity 2 and the liquid outlet top cavity 3, and a valve core disc 5 is arranged outside the valve seat ring 4. By the axial movement of the valve core disc 5, the valve core disc 5 and the valve seat ring 4 are opened and closed, thereby realizing the control of the stop valve.

[0035] The bottom of the liquid inlet bottom cavity 2 is provided with a secondary channel 6, and the secondary channel 6 is provided with a pressure relief plug 7. The secondary channel 6 is in sealing contact with the pressure relief plug 7. The pressure relief plug 7 is closed by the pressure relief plug 7. When the internal pressure of the liquid inlet bottom cavity 2 exceeds the set threshold, the pressure relief plug 7 is driven to open.

[0036] The inside of the liquid inlet bottom cavity 2 is also provided with a threshold lifting assembly. When the valve core disc 5 is in sealing contact with the valve seat ring 4 and is closed, the threshold lifting assembly can increase the trigger threshold of the pressure relief plug 7 driven to open by pressure.

[0037] As shown in Figure 6 The bottom of the main valve body 1 is fixedly provided with a valve body protrusion 601. The valve body protrusion 601 is provided with a pressure application cavity 602, and the pressure application cavity 602 is in communication with the secondary channel 6. The inside of the pressure application cavity 602 is provided with a plug column bottom disc 603, and the plug column bottom disc 603 is fixedly installed with the end of the pressure relief plug 7. The surface of the plug column bottom disc 603 is provided with a medium through hole 604. The fluid on the upper and lower sides of the plug column bottom disc 603 is allowed to flow through the medium through hole 604. The medium through hole 604 is provided with a plurality of groups, which are uniformly distributed in a circumferential array.

[0038] The lower side of the plug column bottom disc 603 is provided with a pressure regulating spring 605. The pressure regulating spring 605 provides elastic pressure to the plug column bottom disc 603, so that the pressure relief plug 7 has an elastic tendency to move into the secondary channel 6. The bottom of the pressure application cavity 602 is provided with a cylindrical blind groove 606, and the cylindrical blind groove 606 is provided with a sealing adjustment column 607. The cylindrical blind groove 606 and the sealing adjustment column 607 are in sealing contact. The sealing adjustment column 607 is provided with a positioning groove 608. The end of the pressure regulating spring 605 is limitingly installed in the inside of the positioning groove 608. The sealing adjustment column 607 is fixedly installed with an adjusting bolt 609. The adjusting bolt 609 penetrates through the bottom of the cylindrical blind groove 606 and is in screw cooperation with the bottom of the cylindrical blind groove 606. The axial position distance of the sealing adjustment column 607 in the cylindrical blind groove 606 can be changed by rotating the adjusting bolt 609. The end of the adjusting bolt 609 is provided with a hexagonal recess. The hexagonal recess is matched with an internal hexagonal wrench to realize the rotation adjustment of the adjusting bolt 609.

[0039] The outside of the valve body protrusion 601 is provided with an output flow pipe 610. The output flow pipe 610 is in communication with the inside of the pressure application cavity 602. In use, the output flow pipe 610 is connected with a pipeline to collect the fluid medium discharged by overflow.

[0040] The threshold lifting assembly comprises a threshold lifting rod 701 and a limiting end disc 702, one end of the threshold lifting rod 701 is fixedly installed with the pressure relief plug 7, and the other end of the threshold lifting rod 701 is fixedly installed with the limiting end disc 702; the outer part of the threshold lifting rod 701 is provided with a limiting fork bracket 703, the limiting fork bracket 703 can be clamped on the outer part of the threshold lifting rod 701 through horizontal movement, and cooperates with the limiting end disc 702 to axially limit the threshold lifting rod 701.

[0041] One side of the limiting fork bracket 703 is fixedly provided with a fork sleeve 704, and a fixed vertical shaft 705 is arranged in the fork sleeve 704. Figure 6 As shown in FIG. 1, the fork sleeve 704 can only move axially along the fixed vertical shaft 705, and rotation of the fork sleeve 704 around the fixed vertical shaft 705 is avoided, a vertical groove can be formed on the surface of the fixed vertical shaft 705, and a convex rib is arranged on the inner side of the fork sleeve 704, so that the rotation of the fork sleeve 704 is limited by cooperation of the convex rib and the vertical groove, and the description is omitted in the figure.

[0042] The fixed vertical shaft 705 is arranged in parallel with the threshold lifting rod 701, the bottom of the fixed vertical shaft 705 is fixedly provided with a sliding support bottom piece 706, a threshold lifting spring 707 is arranged between the sliding support bottom piece 706 and the fork sleeve 704, and the fork sleeve 704 is provided with upward supporting elastic force by the threshold lifting spring 707.

[0043] The sliding support bottom piece 706 is provided with a track sliding rod 708, the track sliding rod 708 is perpendicular to the fixed vertical shaft 705, the outer part of the track sliding rod 708 is sleeved with a driving spring 709, the driving spring 709 applies elastic pressure to the sliding support bottom piece 706, so that the limiting fork bracket 703 has an elastic tendency to move away from the direction of the threshold lifting rod 701, and the inside of the liquid inlet bottom cavity 2 is also provided with a mounting ring piece 710, the track sliding rod 708 is fixedly installed with the mounting ring piece 710, and the mounting ring piece 710 is fixed on the inside lower surface position of the liquid inlet bottom cavity 2 through a screw.

[0044] The upper end of the fixed vertical shaft 705 is fixedly provided with an anti-falling end disc 711, the fork sleeve 704 is limited by the anti-falling end disc 711, and the anti-falling end disc 711 is fixedly provided with a triangular inclined block 712.

[0045] The lower surface of the valve core disc 5 is fixedly provided with a pushing cover 713, when the valve core disc 5 is in sealed contact with the valve seat ring 4 to be closed, the pushing cover 713 is in extrusion contact with the triangular inclined block 712, the limiting fork bracket 703 is clamped on the outer part of the threshold lifting rod 701 through the guiding slope of the triangular inclined block 712 and the pushing cover 713, and then when the threshold lifting rod 701 moves downward, the threshold lifting spring 707 is compressed through the downward pressing of the limiting end disc 702 on the limiting fork bracket 703.

[0046] The valve core disc 5 is fixedly provided with a valve core shaft 501, and a threaded portion 502 is formed in the valve core shaft 501;

[0047] The main valve body 1 is provided with a valve cover assembly 503, and a threaded hole 504 is formed in the valve cover assembly 503; the threaded portion 502 is screwed with the threaded hole 504, so that when the valve core shaft 501 rotates, the valve core disc 5 can be driven to move up and down, thereby realizing the opening and closing control of the stop valve.

[0048] The main valve body 1 is provided with a sealing packing 505, and the sealing packing 505 realizes the sealing between the main valve body 1 and the valve core shaft 501; the end of the valve core shaft 501 is provided with a hand wheel 506, and the rotation of the valve core shaft 501 is realized by rotating the hand wheel 506.

[0049] In use, as shown in Figure 3 , the upstream pipeline is communicated with the fluid inlet 101, and the downstream pipeline is communicated with the fluid outlet 102; the fluid medium is input through the fluid inlet 101 and output through the fluid outlet 102; the position of the valve core disc 5 is controlled up and down by rotating the hand wheel 506 to drive the valve core shaft 501 to rotate, so that the stop valve realizes the opening and closing control.

[0050] When the pressure in the liquid inlet bottom cavity 2 increases, the pressure acts on the end surface of the pressure relief plug 7; when the pressure exceeds a certain threshold value, the pressure relief plug 7 is pushed to move downward, so that the pressure relief plug 7 is removed from the secondary channel 6, and the fluid medium in the liquid inlet bottom cavity 2 is discharged through the secondary channel 6, the medium through hole 604 and the output flow pipe 610. The rotation of the adjusting bolt 609 can adjust the position height of the sealing adjusting column 607, thereby changing the initial compression state of the pressure regulating spring 605, and realizing the pressure relief threshold adjustment of the pressure relief plug 7.

[0051] When the stop valve is closed, as shown in Figure 4 and Figure 7 , after the valve core disc 5 moves downward and is in sealing contact with the valve seat ring 4, because the valve core disc 5 moves downward to the position, the cover 713 is pushed to extrude by being in contact with the triangular inclined block 712, the triangular inclined block 712 is pushed to move horizontally, and the triangular inclined block 712 drives the fixed vertical shaft 705, the sliding support bottom piece 706 and the limiting fork 703 and other components to move synchronously, so that the limiting fork 703 is clamped on the outside of the threshold lifting rod 701 and is located below the limiting end disc 702. At this time, when the pressure relief plug 7 is driven to move downward, the pressure relief plug 7 needs to overcome the elastic force of the pressure regulating spring 605 and the threshold lifting spring 707 at the same time, so that the driving pressure threshold of the pressure relief plug 7 is greatly improved, thereby improving the pressure relief threshold of the pressure relief plug 7 in the closed state of the stop valve, so as to adapt to the higher pressure resistance performance of the stop valve and the upstream pipeline, and reduce unnecessary pressure relief overflow problems caused by pressure fluctuation.

[0052] When the stop valve is opened, the valve core disc 5 moves up and separates from the valve seat ring 4, pushing the cover 713 to move up synchronously, and the triangular inclined block 712 loses the extrusion of the cover 713, and under the elastic force of the driving spring 709, the triangular inclined block 712 and the sliding support bottom piece 706 and other structures are elastically reset and move away from the threshold lifting rod 701, so that the limiting fork 703 is separated from the threshold lifting rod 701, so that the threshold lifting spring 707 no longer intervenes in the support of the pressure relief plug 7, so that the pressure relief threshold of the pressure relief plug 7 is reset and lowered.

[0053] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. 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, characterized in that: A valve seat ring is provided between the liquid inlet bottom chamber and the liquid outlet top chamber. 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 can cooperate to open and close, thereby realizing the shut-off and flow control of the shut-off valve. A secondary channel is provided at the bottom of the liquid inlet chamber. A pressure relief plug is installed in the secondary channel. The secondary channel and the pressure relief plug are in sealed contact. The pressure relief plug seals and closes the secondary channel. When the internal pressure of the liquid inlet chamber exceeds a set threshold, the pressure relief plug will be driven to open. The inlet cavity is further equipped with a threshold lifting component. When the valve core disc and valve seat ring are in sealed contact and closed, the threshold lifting component can increase the trigger threshold for the pressure relief block to be opened by pressure. The threshold lifting component includes a threshold lifting rod and a limiting end plate. One end of the threshold lifting rod is fixedly installed with the pressure relief block, and the other end of the threshold lifting rod is fixedly installed with the limiting end plate. A limiting fork is provided on the outside of the threshold lifting rod. The limiting fork can be locked on the outside of the threshold lifting rod by horizontal movement and cooperates with the limiting end plate to axially limit the threshold lifting rod. A fork ring is fixedly provided on one side of the limiting fork. A fixed vertical shaft is inserted in the fork ring. The fixed vertical shaft is parallel to the threshold lifting rod. A sliding support base is fixedly provided at the bottom of the fixed vertical shaft. A threshold lifting spring is provided between the sliding support base and the fork ring, and the threshold lifting spring provides an upward supporting force to the fork ring. A track slide rod is interspersed throughout the structure, perpendicular to the fixed vertical shaft. A drive spring is fitted around the track slide rod, applying elastic pressure to the sliding support base, causing the limiting fork to have an elastic tendency to move away from the threshold lifting rod. An installation ring is also provided inside the liquid inlet cavity, with the track slide rod and the installation ring fixed to the lower surface of the liquid inlet cavity by screws. An anti-detachment end plate is fixedly installed at the upper end of the fixed vertical shaft, limiting the fork ring. A triangular wedge is fixedly installed on the anti-detachment end plate. A push cover is fixedly installed on the lower surface of the valve core plate. When the valve core plate and valve seat ring are in sealed contact and closed, the push cover will press against the triangular wedge. Through the push cover and the guide slope of the triangular wedge, the limiting fork is locked outside the threshold lifting rod. Therefore, when the threshold lifting rod moves downward, the limiting end plate presses down on the limiting fork, compressing the threshold lifting spring.

2. The integrated dual-channel shut-off valve according to claim 1, characterized in that: The bottom of the main valve body is fixedly provided with a valve body protrusion, and a pressure chamber is opened in the valve body protrusion. The pressure chamber is interconnected with the secondary channel.

3. The integrated dual-channel shut-off valve according to claim 2, characterized in that: The pressure chamber is equipped with a plug base, which is fixedly installed to the end of the pressure relief blockage. A medium passage hole is opened through the surface of the plug base, allowing fluid to flow through the upper and lower sides of the plug base.

4. The integrated dual-channel shut-off valve according to claim 3, characterized in that: A pressure adjusting spring is provided below the plunger chassis. The pressure adjusting spring provides elastic pressure to the plunger chassis, so that the pressure relief blockage has an elastic tendency to move towards the secondary channel. A cylindrical blind groove is provided at the bottom of the pressure chamber, and a sealing adjustment column is provided in the cylindrical blind groove. The cylindrical blind groove and the sealing adjustment column are in sealed contact. A positioning groove is provided on the sealing adjustment column, and the end of the pressure regulating spring is limited and installed inside the positioning groove.

5. The integrated dual-channel shut-off valve according to claim 4, characterized in that: An adjusting bolt is fixedly installed on the sealing adjusting column. The adjusting bolt passes through the bottom of the cylindrical blind groove and is screwed to the bottom of the cylindrical blind groove. By rotating the adjusting bolt, the axial position distance of the sealing adjusting column in the cylindrical blind groove can be changed.

6. The integrated dual-channel shut-off valve according to claim 2, characterized in that: An output flow pipe is provided on the outside of the valve body protrusion, and the output flow pipe is connected to the inside of the pressure chamber.

7. The integrated dual-channel shut-off valve according to claim 1, characterized in that: A valve core shaft is fixedly mounted on the valve core disc, and the valve core shaft has a threaded portion. The main valve body is equipped with a valve cover assembly. The valve cover assembly has a threaded sleeve inside. The threaded part and the threaded sleeve are screwed together, so that when the valve core shaft rotates, it can drive the valve core disc to move up and down, thereby realizing the opening and closing control of the shut-off valve.

8. The integrated dual-channel shut-off valve according to claim 7, characterized in that: The main valve body is equipped with sealing packing, which seals the main valve body and the valve core shaft. A handwheel is installed at the end of the valve core shaft, and the rotation of the valve core shaft is controlled by turning the handwheel.

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