A quick-opening valve device for communicating high pressure fluid with low pressure fluid

Abstract

The application relates to the technical field of low-pressure to high-pressure equipment, and particularly relates to a quick-opening valve device for connecting high-pressure fluid and low-pressure fluid. The device comprises a valve body which is a cuboid, a cylindrical fluid channel is arranged on the central axis of the valve body, the front and back ends of the valve body are connected with high-pressure side fluid ports and low-pressure side fluid ports, meanwhile, the two sides of the valve body are connected with opening sliding channels and closing sliding channels, a valve core is arranged in the valve body, eccentric O-shaped rings and slip bolts are arranged on the valve core, a carbon fiber rope passes through the slip bolts to drive the valve core to rotate, opening turning rods, limiting rods and closing turning rods are arranged on the two sides of the valve core, sliding blocks are arranged in the opening sliding channels and the closing sliding channels, one end of the sliding blocks is connected with the valve core through the carbon fiber rope around the opening (closing) turning rods, the other end of the sliding blocks extends out of the sliding channels, O-shaped ring structures are arranged in the sliding blocks to ensure sealing, the valve is opened, the carbon fiber rope extending out of the opening sliding channels is pulled, and the valve is closed, the carbon fiber rope extending out of the closing sliding channels is pulled.

Description

Technical Field

[0001] This invention relates to the field of high-pressure fluid quick-opening, and to a quick-opening valve device, particularly a quick-opening device that connects a high-pressure fluid on one side and a low-pressure fluid on the other. Background Technology

[0002] Valves are common components of fluid systems. Quick-opening valves that connect high-pressure and low-pressure fluids are important elements in fluid control and testing, especially in fluid dynamics experiments. Achieving rapid valve opening between high-pressure and low-pressure fluids, enabling quick communication between two fluids of different pressures, and ensuring efficient rapid opening are of great significance.

[0003] In existing technologies, there are few quick-opening valve devices that can connect high-pressure fluids and low-pressure fluids, especially when the pressure difference is large, such as around 30 MPa for the high-pressure fluid and around 0 MPa for the low-pressure fluid. Currently, most commercially available quick-opening valves use burst shear valves, which are disposable and require disassembly and replacement of the shear cap after quick opening. Some existing quick-opening valves achieve quick opening by rotating a handwheel or by electrically or hydraulically raising the sealing position of the valve core. However, the opening speed of these valves is still relatively slow, and if the valve opening speed is too slow, it will change the flow pattern of the high-pressure fluid. Furthermore, the sealing method of the fluid under high pressure also presents challenges. Therefore, existing technologies fail to meet the requirements for quick-opening valves that can be used sustainably under high-pressure differential fluids, have faster opening speeds, and stable sealing performance. Thus, ensuring a sustainable and stable quick-opening valve for connecting high-pressure and low-pressure fluids is a key issue for high-pressure fluid quick-opening valves. Summary of the Invention

[0004] To overcome the shortcomings of the prior art and address the need for quick opening when connecting high-pressure fluids and low-pressure fluids, this invention proposes a quick-opening valve device.

[0005] The technical solution of this invention is:

[0006] A quick-opening valve device for connecting high-pressure fluid and low-pressure fluid is disclosed. The valve body is a cuboid with a fluid channel of diameter D at the central axis of the valve body. High-pressure end caps and low-pressure end caps are respectively provided at the front and rear ends of the valve body. Closing slides and opening slides are respectively provided at the left and right ends of the valve body. An opening steering rod, a closing steering rod, and a limiting rod are provided inside the valve body. A valve core rod and a valve core are provided at the center of the valve body.

[0007] Furthermore, the valve core is fixed by the valve core rod passing through the valve body and the valve core; the valve core is provided with an O-ring sealing groove, and the valve core sealing ring is installed on the sealing groove to ensure the sealing capability of the high pressure fluid pipeline pressure P1 and the low pressure fluid pipeline pressure P2 when the quick-opening valve is in the closed position; a valve core rod tightening nut is provided above the valve core rod and is connected to the valve body by threads, and a valve core rod sealing gasket is provided in the middle; the valve core rod part can be sealed.

[0008] Furthermore, the closing steering rod passes through the closing rod hole of the valve body, and a closing steering rod tightening nut is provided above the closing steering rod and is connected to the valve body by threads, with a closing steering rod sealing gasket provided in the middle; this can achieve sealing of the closing steering rod part.

[0009] Furthermore, the closing slide is connected to the valve body by a thread and a closing slide sealing gasket is provided in the middle; a closing slide driving piston is provided inside the closing slide, and an O-ring sealing groove is provided on the closing slide driving piston, with the closing slide sealing ring disposed in the sealing groove; thus, sealing of the closing slide part can be achieved.

[0010] Furthermore, the opening slide is connected to the valve body by a thread and an opening slide sealing gasket is provided in the middle; an opening slide drive piston is provided inside the opening slide, and an O-ring sealing groove is provided on the opening slide drive piston, with the opening slide sealing ring disposed in the sealing groove; thus, the opening slide part can be sealed.

[0011] Furthermore, the high-pressure side end cap is connected to the valve body by threads and a high-pressure side sealing gasket is provided in the middle; the high-pressure side end cap is provided with NPT threads, which can be used to seal the high-pressure side fluid pipeline; thus, the high-pressure side part can be sealed.

[0012] Furthermore, the low-pressure side end cap is connected to the valve body by threads and a low-pressure side sealing gasket is provided in the middle; the low-pressure side end cap is provided with NPT threads, which can be used to seal the connection of the low-pressure side fluid pipeline; the fixed rod block is set between the opening steering rod + limit rod and the low-pressure side sealing gasket; thus, the low-pressure side part can be sealed.

[0013] Furthermore, the high-pressure side swivel bolt and the low-pressure side swivel bolt are mounted on the valve core; the valve core and the opening slide drive piston and the closing slide drive piston are matched by carbon fiber ropes passing through holes; the valve body is a fixed component, while the valve core, the closing slide drive piston, and the opening slide drive piston are moving components.

[0014] Furthermore, based on the pressure P1 of the connected high-pressure fluid pipeline and the pressure P2 of the low-pressure fluid pipeline, as well as the size of the connected pipeline, if the pressure difference is too large or the pipe opening size is too small, the rod-like component is made of high-strength steel.

[0015] The working principle of this invention is as follows: The high-pressure side fluid pressure is P1, and the low-pressure side fluid pressure is P2, requiring P1 > P2. The frictional torque required when the valve core is initially closed is Mf. The valve initially requires rapid pulling or the application of other rapid force devices (such as a pneumatic hammer, impact from a falling heavy object, etc.) attached to the carbon fiber rope driving the opening slide, causing the valve to open quickly. When the valve begins to rotate and open, the high-pressure side fluid pressure P1 and the low-pressure side fluid pressure P2 will generate pressure torques MP1 and MP2 on the valve core, promoting the opening of the quick-opening valve. MP1 and MP2 will further accelerate the opening speed of the quick-opening valve. After the valve core opens quickly, it rapidly reaches the limit rod to prevent the valve opening from being too large. The specific valve forces are as follows: Figure 8 As shown.

[0016] If the quick-opening valve needs to be reset and closed after opening, the carbon fiber rope attached to the closing slide drive piston is pulled to close the valve; after the valve core is closed, it rotates to reach the limit rod to prevent the valve from being closed excessively.

[0017] The beneficial effects of this invention are:

[0018] In terms of structure, this invention adopts a non-welded connection for each valve component, using fully threaded connections without welding, which facilitates disassembly, maintenance, and replacement of components. The overall flow channel of this invention employs a proven and reliable sealing method for high-pressure fluids (NPT thread + gasket + O-ring), overcoming the difficulty of sealing high-pressure fluids.

[0019] Regarding the opening speed of the quick-opening valve, this invention utilizes the pressure torque exerted on the valve core by the carbon fiber rope and the high-pressure fluid itself to achieve a faster opening speed than existing structures, thereby minimizing the disturbance to the high-pressure fluid during the valve opening process.

[0020] Regarding the continuous use of quick-opening valves, this invention uses a carbon fiber rope to reset the valve core, eliminating the need for frequent disassembly and resetting of the quick-opening valve, thus greatly reducing manpower and time in testing and production.

[0021] In terms of structural reliability and replaceability, the valve body of this invention has a simple design, is easy to assemble and disassemble, and the materials and dimensions of the sealing rings and gaskets are all standard specifications. All components of the quick-opening valve are easy to process, replace, and maintain. Attached Figure Description

[0022] Figure 1 This is a simplified structural diagram (3 / 4 axonometric view) of a quick-opening valve device according to the present invention;

[0023] Figure 2 This is a partial structural diagram of the closing slide of the present invention;

[0024] Figure 3This is a partial structural diagram of the high-voltage side end cap of the present invention;

[0025] Figure 4 (a) A partial structural diagram of the valve core in the closed state (top view dissection); (b) A partial structural diagram of the valve core in the open state (top view dissection); (c) A partial structural diagram of the valve core in the closed state (front view dissection);

[0026] Figure 5 This is a schematic diagram (axonometric view) of the fixed rod block component of the quick-opening valve device of the present invention;

[0027] Figure 6 This is a partial structural diagram of the opening slide of the present invention;

[0028] Figure 7 This is a partial structural diagram of the low-pressure side end cap portion of the present invention.

[0029] Figure 8 This is a schematic diagram of the force applied to a specific valve according to the present invention.

[0030] The markings in the diagram are as follows: 1. Close the slide rail; 1-1. Close the slide rail plug; 1-2. Close the slide rail drive piston; 1-3. Close the slide rail seal ring; 1-4. Close the slide rail gasket; 2. High-pressure side end cap; 2-1. High-pressure side gasket; 3. Valve body; 4. Valve core rod; 4-1. Valve core seal ring; 4-2. High-pressure side swivel bolt; 4-3. Low-pressure side swivel bolt; 4-4. Valve core; 4-5. Tighten the nut on the valve core rod; 4-6. Valve core rod gasket; 5. Open the slide rail; 5-1. Open the slide rail plug; 5-2. Open the slide rail drive piston; 5-3. Open the slide rail seal ring; 5-4. Open the slide rail gasket; 6. Low-pressure side end cap; 6-1. Low-pressure side gasket; 7. Close the steering rod; 7-1. Close the steering rod gasket; 7-2. Close the steering rod and tighten the nut; 8. Open the steering rod; 9. Limit rod; 10. Fixed rod block. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] The implementation process of the method of the present invention is as follows:

[0033] A quick-opening valve device:

[0034] Assemble the valve core assembly. Install the valve core sealing ring 4-1 into the sealing ring mounting groove of the valve core 4-4. Connect the high-pressure side swivel bolt 4-2 to the valve core 4-4 via threads. Connect the low-pressure side swivel bolt 4-3 to the valve core 4-4 via threads. Install the valve core 4-4 into the valve body 3. Insert the valve core rod 4 into the valve core mounting hole on the valve body 3 and pass through the valve core 4-4. Install the valve core rod sealing gasket 4-6 onto the valve body 3. Tighten the nut on the valve core rod to connect it to the valve body 3 via threads and press the valve core rod sealing gasket 4-6 to complete the valve core rod seal. Pass the carbon fiber rope through the high-pressure side swivel bolt 4-2 and the other carbon fiber rope through the low-pressure side swivel bolt 4-3 to complete the assembly of the valve core assembly.

[0035] Assemble the steering lever assembly. Insert the steering lever 7 into the valve body 3. Install the steering lever sealing gasket 7-1 on the steering lever sealing surface of the valve body 3. Tighten the steering lever nut 7-2 to connect it to the valve body 3 via threads and press the steering lever sealing gasket 7-1 to complete the steering lever seal. This completes the assembly of the steering lever assembly.

[0036] Assemble the limit rod and opening steering rod assembly. Install the limit rod 9 into the slide rail machined in the valve body 3, install the opening steering rod 8 into the slide rail machined in the valve body 3, and install the fixed rod block 10 into the valve body 3. The fixed rod block 10 fixes the limit rod 9 and the opening steering rod 8 in a specific position to prevent their positions from changing, thus completing the assembly of the limit rod and opening steering rod assembly.

[0037] Assemble the opening slide assembly. Take the carbon fiber rope that passed through the low-pressure side during the previous valve core assembly assembly, loop it around the opening steering rod 8, and pass it through the hole in the side wall of the valve body 3 where the opening slide 5 is installed. Tie the carbon fiber rope to one end of the opening slide drive piston 5-2. Use a new carbon fiber rope to tie to the other end of the opening slide drive piston 5-2. Install the opening slide sealing ring 5-3 into the sealing ring mounting groove of the opening slide drive piston 5-2. Install the opening slide drive piston inside the opening slide 5. Extend the carbon fiber rope tied to the outside of the opening slide drive piston 5-2 out of the hole in the center of the opening slide plug 5-1. This rope acts as a traction rope to pull the quick-opening valve open. Connect the opening slide plug 5-1 to the opening slide 5 via threads. Install the opening slide sealing gasket 5-4 at the opening slide sealing surface of the valve body 3. Connect the opening slide 5 to the valve body 3 via threads and press the opening slide sealing gasket 5-4 tightly to complete the sealing of the opening slide and the installation of the opening slide assembly is complete.

[0038] Assemble the closing slide assembly. Take the carbon fiber rope that passed through the high-pressure side during the previous valve core assembly assembly, loop it around the closing steering rod 7, and pass it through the hole in the side wall of the valve body 3 where the closing slide 1 is installed. Tie the carbon fiber rope to one end of the closing slide drive piston 1-2. Use a new carbon fiber rope to tie to the other end of the closing slide drive piston 1-2. Install the closing slide sealing ring 1-3 into the sealing ring mounting groove of the closing slide drive piston 1-2. Install the closing slide drive piston inside the closing slide 1. Extend the carbon fiber rope tied to the outside of the closing slide drive piston 1-2 out of the hole in the center of the closing slide plug 1-1. This rope acts as a traction rope to pull the quick-opening valve back to its closed position. Connect the closing slide plug 1-1 to the closing slide 1 via threads. Install the closing slide sealing gasket 1-4 onto the closing slide sealing surface of the valve body 3. Connect the closing slide 1 to the valve body 3 via threads and press the closing slide sealing gasket 1-4 tightly to complete the sealing of the closing slide. The installation of the closing slide assembly is now complete.

[0039] Assemble the high-pressure side connection assembly, install the high-pressure side sealing gasket 2-1 on the high-pressure side sealing surface of the valve body 3, connect the high-pressure side end cap 2 to the valve body 3 by thread and press the high-pressure side sealing gasket 2-1 to complete the sealing of the high-pressure side connection assembly and complete the installation of the high-pressure side connection assembly.

[0040] Assemble the low-pressure side connection assembly, install the low-pressure side sealing gasket 6-1 on the low-pressure side sealing surface of the valve body 3, connect the low-pressure side end cap 6 to the valve body 3 by thread and press the high-pressure side sealing gasket 6-1 to complete the sealing of the low-pressure side connection assembly and complete the installation of the low-pressure side connection assembly.

[0041] The high-pressure fluid pipe with NPT thread is connected to the high-pressure side end cap 2, and the low-pressure fluid pipe with NPT thread is connected to the low-pressure side end cap 6, thus completing the assembly process of the present invention.

[0042] During the installation process of this invention, the high-pressure fluid pipeline is connected to the high-pressure fluid pipeline through the NPT thread machined inside the high-pressure side end cap 2, and the low-pressure fluid pipeline is connected to the low-pressure fluid pipeline through the NPT thread machined inside the low-pressure side end cap 6. The sealing characteristic of the NPT thread ensures the sealing of the high-pressure fluid pipeline and the low-pressure fluid pipeline. The carbon fiber rope attached to the closing slide drive piston 1-2 is pulled until the valve core 4-4 reaches the limit rod 9. At this time, the quick-opening valve is in the closed state, connecting the high-pressure pipeline to reach high pressure P1 and connecting the low-pressure pipeline to reach low pressure P2, thus completing the installation.

[0043] During the operation of this invention, in the closed state of the quick-opening valve, the high-pressure fluid seal is maintained by the high-pressure side end cap 2 + high-pressure side sealing gasket 2-1 + valve core sealing ring 4-1 + closing slide sealing ring 1-3 to keep the high-pressure pressure P1 constant, and the low-pressure fluid seal is maintained by the low-pressure side end cap 6 + low-pressure side sealing gasket 6-1 + valve core sealing ring 4-1 + opening slide sealing ring 5-3 to keep the low-pressure pressure P2 constant. When a quick-opening condition is required, the operator quickly pulls the carbon fiber rope attached to the opening slide drive piston 5-2, or uses a pneumatic hammer or a heavy object slide rail to strike it, etc., and the valve core 4-4 quickly rotates around the valve core rod 4 to open the valve to the open position. When the valve core 4-4 rotates to the limit rod 9, the valve opening is completed. The maximum force required to be applied during the quick-opening process of the quick-opening valve is to overcome the frictional torque when the valve core 4-4 is in the closed position. After the valve core 4-4 starts to rotate, the high-pressure torque applied to the valve core 4-4 by the high-pressure fluid will promote the quick opening of the valve.

[0044] During maintenance of this invention, the high-pressure fluid pipeline and high-pressure side end cap 2 are removed, and the low-pressure fluid pipeline and low-pressure side end cap 6 are removed. At this time, the high-pressure side sealing gasket 2-1 and the low-pressure side sealing gasket 6-1 can be replaced. The closing slide 1 is removed from the valve body 3, and the opening slide 5 is removed from the valve body 3. At this time, the closing slide drive piston 1-2 and the opening slide drive piston 5-2 can be removed, and the closing slide sealing ring 1-3, closing slide sealing gasket 1-4, opening slide sealing ring 5-3, and opening slide sealing gasket 5-4 can be replaced. The fixed rod block 10 is removed, and the opening steering rod 8 and the limit rod 9 can be replaced. The closing steering rod tightening nut 7-2 is removed, and the closing steering rod 7 and the closing steering rod sealing gasket 7-1 can be replaced. Remove the nut 4-5 from the valve core rod and replace the valve core rod 4, valve core sealing ring 4-1, high-pressure side swivel bolt 4-2, low-pressure side swivel bolt 4-3, valve core 4-4, and valve core rod sealing gasket 4-6.

[0045] The above description is merely one embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has disclosed a more suitable embodiment above, it is not intended to limit the present invention. Any person skilled in the art can make certain modifications to the above-disclosed structure and technical content without departing from the scope of the technical solution of the present invention, thus creating equivalent embodiments.

[0046] For example, the closing slide gasket 1-4, the high-pressure side gasket 2-1, the closing steering rod gasket 7-1, the low-pressure side gasket 6-1, the valve core rod gasket 4-6, and the opening slide gasket 5-4 may not use gaskets. Any sealing structure form approved by engineering experience, such as O-rings or other types of gaskets, can be used for sealing in this invention.

[0047] For example, the valve core 4-4 structure currently uses a single eccentric single-sided O-ring seal in this case. This structure can also be used for sealing in this invention by using a single eccentric double-sided O-ring, a double eccentric O-ring seal structure, a triple eccentric O-ring seal structure, or a seal structure in which the O-ring is embedded in the valve body 3.

[0048] For example, in the case of closing steering lever 7, opening steering lever 8, and limit lever 9, the installation and positioning method can also be fixed to the valve body 3 by spot welding or other methods.

[0049] For example, the carbon fiber rope connecting the valve core 4-4 to the closing slide drive piston 1-2 and the high-pressure side swivel bolt 4-2 can be replaced with other connection methods, and the carbon fiber rope connecting the valve core 4-4 to the opening slide drive piston 5-2 and the low-pressure side swivel bolt 4-3 can be replaced with other connection methods.

[0050] For example, the connection and sealing method between the high-pressure side end cap 2 and the high-pressure fluid pipeline uses NPT thread, and the connection and sealing method between the low-pressure side end cap 6 and the low-pressure fluid pipeline uses NPT thread. Any sealing connection method that has been approved by engineering experience, such as tapered hard seal, ordinary thread + O-ring / gasket, etc., can be used for sealing in this invention.

[0051] For example, a quick-opening valve connects a high-pressure fluid line to a low-pressure fluid line. It is also suitable for connecting two high-pressure fluid lines, only requiring the replacement of the low-pressure fluid line P2 with a high-pressure fluid line P3 that is lower than the high-pressure fluid line P1.

[0052] Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this invention, without departing from the scope of the technical solution of this invention, shall still fall within the scope of the technical solution of this invention.

Claims

1. A quick-opening valve device for connecting high-pressure fluid and low-pressure fluid, characterized in that, The quick-opening valve device includes a valve body (3), which is a cuboid. A fluid channel with a diameter of D is located at the central axis of the valve body (3). A high-pressure end cap (2) and a low-pressure end cap (6) are respectively provided at the front and rear ends of the valve body (3). A closing slide (1) and an opening slide (5) are respectively provided at the left and right ends of the valve body (3). An opening steering rod (8), a closing steering rod (7), and a limit rod (9) are provided inside the valve body (3). A valve core rod (4) and a valve core (4-4) are provided at the center of the valve body (3). The closing steering rod (7) passes through the closing rod hole of the valve body (3). A closing steering rod tightening nut (7-2) is provided above the closing steering rod (7) and is connected to the valve body (3) by threads. A closing steering rod sealing gasket (7-1) is provided in the middle; the closing steering rod part can be sealed. The closing slide (1) is connected to the valve body (3) by a thread and a closing slide sealing gasket (1-4) is provided in the middle; a closing slide driving piston (1-2) is provided inside the closing slide (1), and an O-ring sealing groove is provided on the closing slide driving piston, and a closing slide sealing ring (1-3) is provided in the O-ring sealing groove; the closing slide part can be sealed. The opening slide (5) is connected to the valve body (3) by a thread and an opening slide sealing gasket (5-4) is provided in the middle; an opening slide driving piston (5-2) is provided inside the opening slide (5), and an O-ring sealing groove is provided on the opening slide driving piston, and an opening slide sealing ring (5-3) is provided in the O-ring sealing groove; the opening slide part can be sealed.

2. The quick-opening valve device according to claim 1, characterized in that: The valve core (4-4) is fixed in the valve body by the valve core rod (4) passing through the valve body (3); the valve core (4-4) is provided with an O-ring sealing groove, and the valve core sealing ring (4-1) is installed on the O-ring sealing groove to ensure the sealing capability between the high pressure fluid pipeline and the low pressure fluid pipeline when the quick-opening valve device is in the closed position; a valve core rod tightening nut (4-5) is provided above the valve core rod (4) and is connected to the valve body (3) by threads, and a valve core rod sealing gasket (4-6) is provided in the middle; the valve core rod part can be sealed.

3. The quick-opening valve device according to claim 1, characterized in that: The high-pressure side end cap (2) is connected to the valve body (3) by threads and a high-pressure side sealing gasket (2-1) is set in the middle; the high-pressure side end cap (2) is provided with NPT threads, which can be used to seal the high-pressure side fluid pipeline; the high-pressure side part can be sealed.

4. The quick-opening valve device according to claim 1, characterized in that: The low-pressure side end cap (6) and the valve body (3) are connected by threads and a low-pressure side sealing gasket (6-1) is provided in the middle; the low-pressure side end cap (6) is provided with NPT threads, which can be used to seal the low-pressure side fluid pipeline; a fixed rod block (10) is provided between the opening steering rod (8) and the low-pressure side sealing gasket (6-1) and between the limiting rod (9) and the low-pressure side sealing gasket (6-1); the low-pressure side part can be sealed.

5. A quick-opening valve device according to any one of claims 1-4, characterized in that: The high-pressure side swivel bolt (4-2) and the low-pressure side swivel bolt (4-3) are mounted on the valve core (4-4); the valve core (4-4) is matched with the opening slide drive piston (5-2) and the closing slide drive piston (1-2) by passing a carbon fiber rope through a hole; the valve body (3) is a fixed component, and the valve core (4-4) and the closing slide drive piston (1-2) and the opening slide drive piston (5-2) are moving components; The high-pressure side fluid pressure is P1, and the low-pressure side fluid pressure is P2. P1 > P2 is required. The frictional torque required when the valve core (4-4) is initially closed is Mf. The force-applying device pulls the valve open quickly through a carbon fiber rope attached to the opening slide drive piston (5-2). When the valve starts to rotate and open, the high-pressure side fluid pressure P1 and the low-pressure side fluid pressure P2 will generate pressure torques MP1 and MP2 on the valve core (4-4) respectively, which will promote the opening of the quick-opening valve device. The pressure torques MP1 and MP2 will further accelerate the opening speed of the quick-opening valve device. After the valve core (4-4) opens quickly, it quickly reaches the limit rod (9) to avoid the valve opening being too large. If the quick-opening valve device needs to be reset and closed after opening, the carbon fiber rope attached to the closing slide drive piston (1-2) is pulled to close the valve; after the valve core (4-4) is closed, it rotates to reach the limit rod (9) to avoid the valve being closed too much.

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