Integrated double-channel stop valve

Abstract

The invention 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, the liquid inlet bottom cavity and the liquid outlet top cavity are formed in the main valve body, a valve seat ring is arranged between the liquid inlet bottom cavity and the liquid outlet top cavity, a valve element disc is arranged outside the valve seat ring, and the valve element disc moves axially through the valve element disc. The valve element disc and the valve seat ring are matched in an opening and closing mode, and therefore stopping and circulation control of the stop valve are achieved. According to the integrated double-channel stop valve, integrated pressure relief protection can be achieved, fluid pressure relief and discharge can be conducted when the pressure is too high through the additionally-arranged secondary channel, and the integration degree is improved while the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to an integrated dual-channel stop valve. Background Art

[0002] A globe valve is a commonly used fluid control valve, primarily used to shut off or regulate the flow of media in pipelines. The closing principle of a globe valve is to rely on the pressure of the valve stem to force the sealing surface of the disc into close contact with the sealing surface of the valve seat, thereby preventing the flow of media. Traditionally, globe valves and pressure relief valves are typically installed separately, requiring additional piping to connect them. This not only reduces the level of integration, but also, because globe valves are typically used to shut off downstream equipment, the pressure relief valve's threshold is typically set low when the globe valve is in operation to accommodate the lowest-pressure downstream equipment. However, as the globe valve closes, the pressure threshold typically rises due to the shutoff of downstream equipment. Traditional designs with separate globe and pressure relief valves cannot automatically adjust the pressure relief valve's threshold based on the globe valve's operation. Installing a pressure relief valve downstream of the globe valve means that when the globe valve is closed, the pressure relief valve loses its pressure protection for the globe valve and its upstream pipeline. Consequently, pressure relief valves and their connecting pipelines must be installed both upstream and downstream of the globe valve, significantly increasing cost and space requirements. Space, in particular, is a rigid limitation in some operating conditions. Summary of the Invention

[0003] The object of the present invention is to provide an integrated dual-channel stop valve to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an integrated dual-channel stop valve, comprising a main valve body, and a liquid inlet bottom cavity and a liquid outlet top cavity defined within the main valve body; a valve seat ring is disposed between the liquid inlet bottom cavity and the liquid outlet top cavity; a valve core disk is disposed on the exterior of the valve seat ring; the valve core disk and the valve seat ring are opened and closed in coordination with each other through axial movement of the valve core disk, thereby achieving shutoff and flow control of the stop valve; A secondary channel is opened at the bottom of the liquid inlet bottom cavity, and a pressure relief plug is provided in the secondary channel. The secondary channel is in sealing contact with the pressure relief plug, and the secondary channel is sealed and closed by the pressure relief plug. When the internal pressure of the liquid inlet bottom cavity exceeds the set threshold, the pressure relief plug will be driven to open.

[0005] A threshold lifting component is also provided inside the liquid inlet bottom cavity. When the valve core disc is in sealing contact with the valve seat ring and is closed, the threshold lifting component can increase the triggering threshold at which the pressure relief blockage is driven to open by pressure.

[0006] A valve body convex portion is fixedly provided at the bottom of the main valve body, a pressure chamber is opened in the valve body convex portion, and the pressure chamber is communicated with the secondary channel.

[0007] A plug chassis is provided inside the pressure chamber, and the plug chassis is fixedly installed with the end of the pressure relief plug. A medium through hole is opened through the surface of the plug chassis, and the fluid on the upper and lower sides of the plug chassis can flow through the medium through the medium through hole.

[0008] A pressure regulating spring is provided below the plunger chassis, which provides elastic pressure to the plunger chassis, so that the pressure relief blockage has an elastic tendency to move toward the secondary channel; A cylindrical blind groove is provided at the bottom of the pressure chamber, a sealing adjustment column is provided in the cylindrical blind groove, the cylindrical blind groove and the sealing adjustment column are in sealing contact, a positioning groove is provided on the sealing adjustment column, and the end of the pressure regulating spring is limitedly installed inside the positioning groove.

[0009] An adjusting bolt is fixedly installed on the sealing adjustment column. The adjusting bolt passes through the bottom of the cylindrical blind groove and is spirally engaged with the bottom of the cylindrical blind groove. By rotating the adjusting bolt, the axial position distance of the sealing adjustment column in the cylindrical blind groove can be changed.

[0010] An output flow tube is provided on the outside of the convex portion of the valve body, and the output flow tube is communicated with the inside of the pressure chamber.

[0011] The threshold lifting assembly includes a threshold lifting rod and a limit end plate, one end of the threshold lifting rod is fixedly installed with the pressure relief plug, and the other end of the threshold lifting rod is fixedly installed with the limit end plate; A limiting fork frame is provided on the outside of the threshold lifting rod. The limiting fork frame can be stuck 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.

[0012] A fork frame ring sleeve is fixedly provided on one side of the limiting fork frame, a fixed vertical shaft is inserted in the fork frame ring sleeve, the fixed vertical shaft is arranged parallel to the threshold lifting rod, a sliding support bottom piece is fixedly provided on the bottom of the fixed vertical shaft, and a threshold lifting spring is provided between the sliding support bottom piece and the fork frame ring sleeve, and the threshold lifting spring provides an upward supporting elastic force to the fork frame ring sleeve.

[0013] A track slide is inserted in the sliding support bottom member, and the track slide is perpendicular to the fixed vertical axis. A driving spring is sleeved on the outside of the track slide, and the driving spring applies elastic pressure to the sliding support bottom member, so that the limit fork frame has an elastic tendency to move in the direction away from the threshold lifting rod. A mounting ring piece is also provided inside the liquid inlet bottom cavity, and the track slide is fixedly installed with the mounting ring piece, and the mounting ring piece is fixed to the lower surface position of the inner part of the liquid inlet bottom cavity by screws.

[0014] The upper end of the fixed vertical shaft is fixedly provided with an anti-slip end plate, which limits the fork frame ring sleeve through the anti-slip end plate, and a triangular oblique block is fixedly provided on the anti-slip end plate; A push cover is fixedly provided on the lower surface of the valve core disc. When the valve core disc is in sealing contact with the valve seat ring and closed, the push cover will be squeezed into contact with the triangular bevel block. The push cover cooperates with the guide bevel of the triangular bevel block to make the limit fork frame stuck on the outside of the threshold lifting rod. When the threshold lifting rod moves downward, the limit end disc presses down the limit fork frame to compress the threshold lifting spring.

[0015] A valve core shaft is fixedly arranged on the valve core disk, and a threaded portion is provided on the valve core shaft; A valve cover assembly is installed on the main valve body, and a threaded sleeve portion is provided inside the valve cover assembly. The threaded portion and the threaded sleeve portion are spirally matched, so that when the valve core shaft rotates, the valve core disk can be driven to move up and down, thereby realizing the opening and closing control of the stop valve.

[0016] The main valve body is provided with a sealing filler inside, and the sealing between the main valve body and the valve core shaft is achieved through the sealing filler; the end of the valve core shaft is installed with a hand wheel, and the rotation control of the valve core shaft is achieved by turning the hand wheel.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The integrated dual-channel stop valve of the present invention can realize integrated pressure relief protection. Through the added secondary channel, the fluid pressure can be relieved and discharged when the pressure is too high, thereby improving safety and the degree of integration.

[0018] The present invention utilizes a threshold-raising assembly that works in conjunction with the valve disc and other structures to automatically adjust the secondary channel's opening threshold based on the disc's state. When the shutoff valve is open, downstream equipment becomes complex and typically suffers reduced pressure resistance. The threshold-raising assembly reduces the secondary channel's opening threshold to its initial state. When the shutoff valve is closed, downstream equipment is disconnected, and pressure primarily acts within the shutoff valve and its upstream pipeline, increasing pressure resistance. The threshold-raising assembly raises the secondary channel's opening threshold, significantly reducing the probability of overflow while ensuring safety and enabling dynamic regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle.

[0021] Figure 3 It is a three-dimensional half-section diagram of the present invention.

[0022] Figure 4It is a schematic diagram of the partial structure of the three-dimensional half-section of the present invention.

[0023] Figure 5 It is a three-dimensional half-section front view of the present invention.

[0024] Figure 6 It is a three-dimensional half-section partial structure front view of the present invention.

[0025] Figure 7 It is a schematic diagram of parts of the present invention.

[0026] 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 chamber; 603, plug bottom disc; 604, medium through hole; 605, pressure regulating spring; 606, cylindrical blind groove; 607, sealing adjustment column; 608, positioning groove; 609, adjusting bolt; 610, output flow tube; 701, threshold lifting rod; 702, limit end disc; 703, limit Fork frame; 704, fork frame ring sleeve; 705, fixed vertical shaft; 706, sliding support base; 707, threshold lifting spring; 708, track slide; 709, drive spring; 710, mounting ring; 711, anti-slip end plate; 712, triangular bevel block; 713, push cover; 501, valve core shaft; 502, threaded part; 503, valve cover assembly; 504, screw sleeve part; 505, sealing packing; 506, handwheel; 101, fluid inlet; 102, fluid outlet. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 7 The present invention provides a technical solution: an integrated dual-channel stop valve, comprising a main valve body 1, and a liquid inlet bottom cavity 2 and a liquid outlet top cavity 3 provided inside the main valve body 1, such as Figure 3 As shown in FIG, a fluid inlet 101 and a fluid outlet 102 are respectively formed at each end of the main valve body 1. The fluid inlet 101 communicates with the liquid inlet bottom chamber 2, and the fluid outlet 102 communicates with the liquid outlet top chamber 3. A valve seat ring 4 is disposed between the liquid inlet bottom chamber 2 and the liquid outlet top chamber 3. A valve core disk 5 is disposed on the exterior of the valve seat ring 4. The axial movement of the valve core disk 5 enables the valve core disk 5 and the valve seat ring 4 to cooperate in opening and closing, thereby achieving shutoff and flow control of the stop valve. A secondary channel 6 is opened at the bottom of the liquid inlet bottom cavity 2, and a pressure relief plug 7 is provided in the secondary channel 6. The secondary channel 6 is in sealed contact with the pressure relief plug 7, and the secondary channel 6 is sealed and 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 will be driven to open.

[0029] A threshold lifting component is also provided inside the liquid inlet bottom cavity 2. When the valve core disc 5 is in sealing contact with the valve seat ring 4 and is closed, the threshold lifting component can increase the triggering threshold at which the pressure relief plug 7 is driven to open by pressure.

[0030] like Figure 6 As shown in FIG, a valve body protrusion 601 is fixedly provided at the bottom of the main valve body 1. A pressure chamber 602 is defined in the valve body protrusion 601, which communicates with the secondary channel 6. A plug base 603 is disposed within the pressure chamber 602. The plug base 603 is fixedly mounted to the end of the pressure relief plug 7. A medium through hole 604 is formed through the surface of the plug base 603, allowing fluid to flow through the upper and lower sides of the plug base 603. The medium through holes 604 are provided in a plurality of groups, evenly distributed in a circular array.

[0031] A pressure-regulating spring 605 is provided below the piston chassis 603, and the pressure-regulating spring 605 provides elastic pressure to the piston chassis 603, so that the pressure relief plug 7 has an elastic tendency to move toward the secondary channel 6; a cylindrical blind groove 606 is provided at the bottom of the pressure chamber 602, and a sealing adjustment column 607 is provided in the cylindrical blind groove 606. The cylindrical blind groove 606 and the sealing adjustment column 607 are in sealing contact, and a positioning groove 608 is provided on the sealing adjustment column 607. The end limit of the pressure-regulating spring 605 is installed inside the positioning groove 608. An adjusting bolt 609 is fixedly installed on the sealing adjusting column 607. The adjusting bolt 609 passes through the bottom of the cylindrical blind groove 606 and is spirally engaged with the bottom of the cylindrical blind groove 606. By rotating the adjusting bolt 609, the axial position distance of the sealing adjusting column 607 in the cylindrical blind groove 606 can be changed. A hexagonal groove is provided at the end of the adjusting bolt 609, and the rotation adjustment of the adjusting bolt 609 is achieved by engaging with the hexagonal groove and the hexagonal wrench.

[0032] An output flow tube 610 is provided outside the valve body protrusion 601 , and the output flow tube 610 is communicated with the interior of the pressure chamber 602 . When in use, the output flow tube 610 is connected to a pipeline to collect the overflowed fluid medium.

[0033] The threshold lifting assembly includes a threshold lifting rod 701 and a limiting end plate 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 plate 702. A limiting fork frame 703 is set on the outside of the threshold lifting rod 701. The limiting fork frame 703 can be stuck on the outside of the threshold lifting rod 701 by horizontal movement, and cooperate with the limiting end plate 702 to axially limit the threshold lifting rod 701.

[0034] A fork ring 704 is fixedly provided on one side of the limiting fork frame 703, and a fixed vertical shaft 705 is inserted into the fork ring 704. Figure 6 As shown in the figure, the fork frame ring sleeve 704 can only move axially along the fixed vertical shaft 705 to prevent the fork frame ring sleeve 704 from rotating around the fixed vertical shaft 705. A vertical groove can be opened on the surface of the fixed vertical shaft 705, and a ridge can be set on the inner side of the fork frame ring sleeve 704. The ridge and the vertical groove cooperate to achieve rotation limitation of the fork frame ring sleeve 704, which is omitted in the figure.

[0035] The fixed vertical shaft 705 is arranged parallel to the threshold lifting rod 701, and a sliding support base 706 is fixedly provided at the bottom of the fixed vertical shaft 705. A threshold lifting spring 707 is provided between the sliding support base 706 and the fork frame ring sleeve 704, and the threshold lifting spring 707 provides an upward supporting elastic force to the fork frame ring sleeve 704.

[0036] A track slide 708 is inserted in the sliding support bottom member 706, and the track slide 708 is perpendicular to the fixed vertical shaft 705. A driving spring 709 is sleeved on the outside of the track slide 708. The driving spring 709 applies elastic pressure to the sliding support bottom member 706, so that the limiting fork frame 703 has an elastic tendency to move in the direction away from the threshold lifting rod 701. A mounting ring piece 710 is also provided inside the liquid inlet bottom cavity 2. The track slide 708 is fixedly installed with the mounting ring piece 710, and the mounting ring piece 710 is fixed to the inner lower surface position of the liquid inlet bottom cavity 2 by screws.

[0037] The upper end of the fixed vertical shaft 705 is fixed with an anti-slip end plate 711, which limits the fork ring 704. A triangular inclined block 712 is fixed on the anti-slip end plate 711. A push cover 713 is fixedly provided on the lower surface of the valve core disk 5. When the valve core disk 5 is sealed and closed with the valve seat ring 4, the push cover 713 will be squeezed and contacted with the triangular bevel block 712. The push cover 713 cooperates with the guide bevel of the triangular bevel block 712 to make the limit fork frame 703 stuck on the outside of the threshold lifting rod 701. When the threshold lifting rod 701 moves downward, the limit fork frame 703 is pressed down by the limit end disk 702 to compress the threshold lifting spring 707.

[0038] A valve core shaft 501 is fixedly mounted on the valve core disk 5, and a threaded portion 502 is formed on the valve core shaft 501; A valve cover assembly 503 is installed on the main valve body 1. A screw sleeve portion 504 is provided inside the valve cover assembly 503. The threaded portion 502 is spirally matched with the screw sleeve portion 504, so that when the valve core shaft 501 rotates, it can drive the valve core disk 5 to move up and down, thereby realizing the opening and closing control of the stop valve.

[0039] A sealing packing 505 is provided inside the main valve body 1, and the sealing between the main valve body 1 and the valve core shaft 501 is achieved through the sealing packing 505; a handwheel 506 is installed at the end of the valve core shaft 501, and the rotation control of the valve core shaft 501 is achieved by turning the handwheel 506.

[0040] The present invention is used as Figure 3 As shown in the figure, the upstream pipeline is connected to the fluid inlet 101, and the downstream pipeline is connected to the fluid outlet 102. The fluid medium is input through the fluid inlet 101 and output through the fluid outlet 102. The valve core shaft 501 is driven to rotate by turning the hand wheel 506, and the position of the valve core disk 5 is controlled up and down, so that the stop valve can be opened and closed.

[0041] When the pressure in the liquid inlet bottom chamber 2 increases, the pressure acts on the end surface of the pressure relief plug 7. When the pressure exceeds a certain threshold, the pressure relief plug 7 is pushed downward, causing it to move out of the secondary channel 6. The fluid medium in the liquid inlet bottom chamber 2 is discharged through the secondary channel 6, the medium through-hole 604, and the output flow tube 610. Rotating the adjustment screw 609 can adjust the position and height of the sealing adjustment column 607, thereby changing the initial compression state of the pressure regulating spring 605, and adjusting the pressure relief threshold of the pressure relief plug 7.

[0042] When the stop valve is closed, Figure 4 and Figure 7 As shown in , after the valve core disc 5 moves downward and seals with the valve seat ring 4, the valve core disc 5 moves downward into place, and the push cover 713 pushes the triangular bevel block 712 by contacting and squeezing it, pushing the triangular bevel block 712 to move horizontally. The triangular bevel block 712 drives the fixed vertical shaft 705, the sliding support bottom piece 706, and the limit fork frame 703 to move synchronously, so that the limit fork frame 703 is stuck outside the threshold lifting rod 701 and is located below the limit end disc 702. At this time, when the pressure relief plug 7 is driven downward again by pressure, the downward movement of 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 downward driving pressure threshold of the pressure relief plug 7 is greatly increased. In addition, when the stop valve is closed, the pressure relief threshold of the pressure relief plug 7 is increased to adapt to the higher pressure resistance performance of the stop valve and its upstream pipeline, reducing unnecessary pressure relief overflow caused by pressure fluctuations.

[0043] When the stop valve is opened, the valve core disc 5 moves up and separates from the valve seat ring 4, and the push cover 713 moves up synchronously. After the triangular bevel block 712 loses the squeezing of the push cover 713, under the elastic force of the driving spring 709, the triangular bevel block 712 and the sliding support bottom member 706 and other structures elastically reset in the direction away from the threshold lifting rod 701, so that the limiting fork frame 703 is separated from the threshold lifting rod 701, so that the threshold lifting spring 707 no longer intervenes in the supporting effect of the pressure relief plug 7, so that the pressure relief threshold of the pressure relief plug 7 is reset and lowered.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An integrated dual-channel stop valve, comprising a main valve body, and a liquid inlet bottom chamber and a liquid outlet top chamber provided inside the main valve body, characterized in that: A valve seat ring is provided between the liquid inlet bottom cavity and the liquid outlet top cavity, and a valve core disc is provided on the outside of the valve seat ring. The valve core disc and the valve seat ring are opened and closed in coordination with each other through the axial movement of the valve core disc, thereby realizing the shut-off and flow control of the stop valve; A secondary channel is opened at the bottom of the liquid inlet bottom cavity, and a pressure relief plug is provided in the secondary channel. The secondary channel is in sealing contact with the pressure relief plug, and the secondary channel is sealed and closed by the pressure relief plug. When the internal pressure of the liquid inlet bottom cavity exceeds the set threshold, the pressure relief plug will be driven to open.

2. The integrated dual-channel stop valve according to claim 1, characterized in that: A threshold lifting component is also provided inside the liquid inlet bottom cavity. When the valve core disc is in sealing contact with the valve seat ring and is closed, the threshold lifting component can increase the triggering threshold at which the pressure relief blockage is driven to open by pressure.

3. The integrated dual-channel stop valve according to claim 1, characterized in that: A valve body convex portion is fixedly provided at the bottom of the main valve body, a pressure chamber is opened in the valve body convex portion, and the pressure chamber is communicated with the secondary channel.

4. The integrated dual-channel stop valve according to claim 3, characterized in that: A plug chassis is provided inside the pressure chamber, and the plug chassis is fixedly installed with the end of the pressure relief plug. A medium through hole is opened through the surface of the plug chassis, and the fluid on the upper and lower sides of the plug chassis can flow through the medium through the medium through hole.

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

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

7. The integrated dual-channel stop valve according to claim 3, characterized in that: An output flow tube is provided on the outside of the convex portion of the valve body, and the output flow tube is communicated with the inside of the pressure chamber.

8. The integrated dual-channel stop valve according to claim 2, characterized in that: The threshold lifting assembly includes a threshold lifting rod and a limit end plate, one end of the threshold lifting rod is fixedly installed with the pressure relief plug, and the other end of the threshold lifting rod is fixedly installed with the limit end plate; A limiting fork frame is provided on the outside of the threshold lifting rod. The limiting fork frame can be stuck 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.

9. The integrated dual-channel stop valve according to claim 8, characterized in that: A fork frame ring sleeve is fixedly provided on one side of the limiting fork frame, a fixed vertical shaft is inserted in the fork frame ring sleeve, the fixed vertical shaft is arranged parallel to the threshold lifting rod, a sliding support bottom piece is fixedly provided on the bottom of the fixed vertical shaft, and a threshold lifting spring is provided between the sliding support bottom piece and the fork frame ring sleeve, and the threshold lifting spring provides an upward supporting elastic force to the fork frame ring sleeve.

10. The integrated dual-channel stop valve according to claim 9, characterized in that: A track slide is inserted in the sliding support bottom member, and the track slide is perpendicular to the fixed vertical axis. A driving spring is sleeved on the outside of the track slide, and the driving spring applies elastic pressure to the sliding support bottom member, so that the limit fork frame has an elastic tendency to move in the direction away from the threshold lifting rod. A mounting ring piece is also provided inside the liquid inlet bottom cavity, and the track slide is fixedly installed with the mounting ring piece, and the mounting ring piece is fixed to the lower surface position of the inner part of the liquid inlet bottom cavity by screws.

11. The integrated dual-channel stop valve according to claim 10, characterized in that: The upper end of the fixed vertical shaft is fixedly provided with an anti-slip end plate, which limits the fork frame ring sleeve through the anti-slip end plate, and a triangular oblique block is fixedly provided on the anti-slip end plate; A push cover is fixedly provided on the lower surface of the valve core disc. When the valve core disc is in sealing contact with the valve seat ring and closed, the push cover will be squeezed into contact with the triangular bevel block. The push cover cooperates with the guide bevel of the triangular bevel block to make the limit fork frame stuck on the outside of the threshold lifting rod. When the threshold lifting rod moves downward, the limit end disc presses down the limit fork frame to compress the threshold lifting spring.

12. The integrated dual-channel stop valve according to claim 1, characterized in that: A valve core shaft is fixedly arranged on the valve core disk, and a threaded portion is provided on the valve core shaft; A valve cover assembly is installed on the main valve body, and a threaded sleeve portion is provided inside the valve cover assembly. The threaded portion and the threaded sleeve portion are spirally matched, so that when the valve core shaft rotates, the valve core disk can be driven to move up and down, thereby realizing the opening and closing control of the stop valve.

13. The integrated dual-channel stop valve according to claim 12, characterized in that: The main valve body is provided with a sealing filler inside, and the sealing between the main valve body and the valve core shaft is achieved through the sealing filler; the end of the valve core shaft is installed with a hand wheel, and the rotation control of the valve core shaft is achieved by turning the hand wheel.

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