Union type quick exhaust valve

Abstract

The present invention relates to a flexible quick exhaust valve, comprising a valve body assembly, a valve core assembly capable of performing left and right piston motion relative to the valve body assembly, and a socket assembly for connecting to a pipeline, wherein the valve core assembly and the socket assembly are both mounted on the valve body assembly; the valve body assembly comprises a valve body and a valve body end cap; the valve body comprises a tubular outer cavity and a tubular inner cavity arranged in the center of the outer cavity, the inner cavity of the valve body having a first central through hole with an 8-shaped longitudinal section that passes through the inner cavity of the valve body and closes the right end of the inner cavity; the valve core assembly comprises a valve core and a piston; the piston is connected to the valve core through its rod portion passing through the inner cavity of the valve body, and the piston's limit plate portion is arranged in the inner cavity of the valve body for sliding left and right. The piston drives the valve core to move left and right according to the changes in the air intake of the inner cavity, and cooperates with the valve body assembly to realize the flow and disconnection of the medium in the pipeline. The flexible quick exhaust valve occupies a small space and is corrosion-resistant.

Description

Technical Field

[0001] The present invention relates to the field of valves, in particular to a flexible quick exhaust valve used in semiconductor manufacturing. Background Art

[0002] The domestic semiconductor industry is currently experiencing rapid growth, and this continuous development has led to an increasing use of various strong acidic, alkali, and oxidizing media. However, most existing valve products are made of stainless steel, which cannot be used in these media. Furthermore, existing pneumatic control valves consist of two parts: the actuator and the valve, which takes up a large amount of space. Semiconductor manufacturing equipment is compact in size and space, and its high degree of automation requires a large number of pneumatic control valves. Therefore, traditional actuator-type pneumatic valves are not suitable for semiconductor manufacturing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a movable quick exhaust valve which occupies a small space and is corrosion-resistant.

[0004] The technical solution for achieving the purpose of the present invention is to provide a flexible quick exhaust valve, including a valve body assembly, a valve core assembly that can perform left and right piston movement relative to the valve body assembly, and a socket assembly for connecting to a pipeline, wherein the valve core assembly and the socket assembly are both installed on the valve body assembly.

[0005] The valve body assembly includes a valve body and an inner end cover of the valve body; the valve body includes a tubular outer cavity and a tubular inner cavity arranged in the center of the outer cavity, the inner cavity is connected to the inner wall of the outer cavity by the front and rear parts of its outer periphery, so that the inner cavity of the entire valve body has a first central through hole with a longitudinal section of an 8-shape and runs through the left and right; the inner cavity opens to the right, and a second central through hole is provided on the left end face of the inner cavity; the outer periphery front part of the outer cavity is provided with two ventilation ends arranged on the left and right that pass through the inner cavity of the inner cavity, of which the one on the left is the valve opening air inlet end, and the one on the right is the valve closing air inlet end, the valve opening air inlet end is connected with the left part of the inner wall of the inner cavity through the first air channel, and the valve closing air inlet end is connected with the right part of the inner wall of the inner cavity through the second air channel; the inner end cover of the valve body is installed at the right end of the inner cavity of the valve body to close the right end of the inner cavity.

[0006] The valve core assembly includes a valve core, a piston and a fifth sealing ring; the left part of the valve core is in the shape of a cone with a smaller left side and a larger right side, and the right part is in the shape of a disk; the piston includes a rod and a limiting disk arranged on the right side of the rod; the outer peripheral surface of the limiting disk of the piston is provided with an annular fifth sealing ring groove; the left and right end edges of the limiting disk are both chamfered; the outer diameter of the piston rod corresponds to the aperture of the second central through hole of the valve body, and the outer diameter of the limiting disk of the piston corresponds to the inner diameter of the inner cavity of the valve body; the piston is connected to the valve core after its rod passes through the second central through hole of the inner cavity of the valve body and is connected to the valve The core is connected in transmission, and the limit plate part of the piston is slid left and right in the inner cavity of the valve body; when the piston is at the far left, there is a first air intake space in an annular shape that communicates with the first air channel between the left end face of the limit plate part of the piston with a chamfer and the left wall of the inner cavity; when the piston is at the far right, the right end face of the rod part of the piston is blocked by the left end face of the end cover in the valve body, and there is a second air intake space in an annular shape that communicates with the second air channel between the right end face of the limit plate part of the piston with a chamfer and the end cover in the valve body; the fifth sealing ring is arranged in the fifth sealing ring groove for sealing.

[0007] Furthermore, the valve body assembly also includes a first sealing ring and a second sealing ring; the right end opening of the inner cavity of the valve body is stepped, the inner end of the right end opening of the inner cavity has an internal thread, and a first sealing ring groove is provided on the left side of the internal thread part; a second sealing ring groove is provided in the middle of the hole wall of the second central through hole of the inner cavity; the shape of the end cover in the valve body corresponds to the stepped opening at the right end of the inner cavity, including a head and a threaded rod connected to the right side of the head, and the rightmost end of the threaded rod is provided with a first sealing ring half groove corresponding to the first sealing ring groove, and the end cover in the valve body is screwed on the right end of the inner cavity of the valve body by its threaded rod to close the right end of the inner cavity, and the first sealing ring is arranged in the first sealing ring groove and the first sealing ring half groove for sealing; the second sealing ring is arranged in the second sealing ring groove.

[0008] Furthermore, a piston blind hole with an internal thread is provided in the center of the right end face of the valve core; an external thread corresponding to the piston blind hole is provided at the left end of the piston rod, and a drop of 1 mm is provided between the right end face of the limit plate and the right end face of the rod; the piston is screwed together with the piston blind hole of the valve core by the external thread part of its rod.

[0009] Furthermore, the valve body assembly also includes an inlet connector, an outlet connector and a third sealing ring; the left and right ends of the outer cavity of the valve body are stepped; the inlet connector includes a disc, a connecting neck connected to the left side of the disc and a limiting neck connected to the right side of the disc; the shape of the limiting neck corresponds to the stepped portion at the left end of the outer cavity, and an annular third sealing ring groove is provided on the outer periphery of the limiting neck; the third central through hole of the entire inlet connector is in the shape of three sections, with the left section hole being smaller and the right section hole being larger, wherein the left section hole and the right section hole are both circular holes, the middle section hole is a trumpet-shaped hole with a smaller left side and a larger right side, and the maximum aperture at the right end of the middle section hole is smaller than the inner diameter of the outer cavity; The outlet connector and the inlet connector are symmetrically arranged, including a disc, a connecting neck connected to the right side of the disc and a limiting neck connected to the left side of the disc; the difference between the outlet connector and the inlet connector is that: the fourth central through hole of the entire outlet connector is in the shape of three sections, with the left section hole larger and the right section hole smaller, among which the left section hole and the right section hole are both circular holes, and the middle section hole is a trumpet-shaped hole with the left section hole larger and the right section hole smaller, and the maximum aperture at the left end of the middle section hole is larger than the inner diameter of the outer cavity; two third sealing rings are arranged in corresponding third sealing ring grooves; the inlet connector is connected to the left side of the valve body by fasteners, and the outlet connector is connected to the right side of the valve body by fasteners.

[0010] The left diameter of the left part of the valve core is smaller than the aperture of the left section hole of the inlet end connector, and the right diameter of the left part is larger than the aperture of the left section hole of the inlet end connector.

[0011] Furthermore, the valve body assembly also includes screws and screw covers; the screw covers are made of PP material; the outer edges of the left and right ends of the outer cavity of the valve body are each provided with 8 evenly spaced blind holes with internal threads.

[0012] The discs of the inlet connector and the outlet connector are both provided with countersunk holes of a number corresponding to the blind holes of the outer cavity; the inlet connector is embedded in the left end step part of the outer cavity of the valve body by its limiting neck, and then 8 screws are passed through the corresponding countersunk holes of the inlet connector and screwed into the internal threaded blind hole of the outer cavity, and then the corresponding screw cover is tightly fitted and buckled; the outlet connector is embedded in the right end step part of the outer cavity of the valve body by its limiting neck, and then 8 screws are passed through the corresponding countersunk holes of the outlet connector and screwed into the internal threaded blind hole of the outer cavity, and then the corresponding screw cover is tightly fitted and buckled.

[0013] Furthermore, the valve body assembly also includes a fourth sealing ring; the left end faces of the connecting necks of the inlet connector and the outlet connector are both provided with an annular fourth sealing ring groove opening to the left; two fourth sealing rings are arranged in the corresponding fourth sealing ring grooves; the connecting necks of the inlet connector and the outlet connector are both provided with external threads.

[0014] The socket assembly includes an inlet socket, an oil-relief nut and an outlet socket; the inlet socket includes a pipe portion and a connecting portion connected to the right side of the pipe portion, the shape of the connecting portion corresponds to the left end of the inlet connector, and the connecting portion has an external thread; the outlet socket and the inlet socket are symmetrically arranged; one oil-relief nut is screwed on the external threads of the inlet socket and the inlet connector to connect the oil, and another oil-relief nut is screwed on the external threads of the outlet socket and the outlet connector to connect the oil; the fourth sealing ring seals between the inlet socket and the inlet connector, and between the outlet socket and the outlet connector.

[0015] Furthermore, the inner end cover of the valve body, the inlet connector, the outlet connector, the piston and the oil nut are all made of PP material, the valve core is made of PTFE material, the inlet socket is made of PVDF material, and the outlet socket is made of PVC-U material.

[0016] Furthermore, the working method of the movable quick exhaust valve is that when the entire valve core assembly is at the extreme left end, the valve core, with its frustum-shaped left portion, abuts against the right end of the left section hole of the inlet end connector at a right angle to close the liquid channel. After the opening control of the movable quick exhaust valve is implemented, the closed valve inlet end releases pressure, and the open valve inlet end is filled with air. The gas enters the first inlet space through the first air channel, causing the piston to move the valve core to the right. The liquid passes through the 8-shaped first central through hole of the valve body and then enters the outlet end connector and the outlet end socket to start discharging. When the piston moves to the right until the right end face of the piston rod hits the left end face of the end cover in the valve body, the entire flexible quick exhaust valve is fully opened, and the liquid is discharged at the highest flow rate; when the flexible quick exhaust valve is in the open state and needs to be closed, after the closing control of the flexible quick exhaust valve is implemented, the air inlet end of the open valve is depressurized, and the air inlet end of the closed valve is inflated, and the gas enters the second air inlet space through the second air channel and pushes the piston to the left until the valve core is blocked by the right end of the left section hole of the inlet end connector at a right angle, and the entire flexible quick exhaust valve is closed.

[0017] The present invention has positive effects: (1) The movable quick exhaust valve of the present invention combines the valve and the pneumatic actuator into one, which greatly saves the space occupied by the valve. The outer volume is only half of that of the traditional pneumatic control valve. It has a lightweight design, corrosion resistance, and low cost. It can be widely used in the conveying flow metering of corrosive media and is particularly suitable for use in precision occasions in semiconductor manufacturing.

[0018] (2) The movable quick exhaust valve of the present invention connects the opening valve inlet end and the closing valve inlet end to the interface thread of the gas source respectively. The air inlet drives the piston to move through the opening valve inlet end and the closing valve inlet end to realize the opening and closing of the entire movable quick exhaust valve. The gas enters the first air intake space through the first air channel H1, causing the piston to move to the right with the valve core. The gas enters the second air intake space through the second air channel and pushes the piston to the left. The third central through hole of the inlet end connector is in a three-section shape with a small left end and a large right end, which is conducive to guiding the liquid to the right. The maximum aperture of the right end of the middle section of the third central through hole is smaller than the inner diameter of the outer cavity, which is conducive to guiding it to the first central through hole. The fourth central through hole of the outlet end connector is in a three-section shape with a large left end and a small right end, which is also conducive to guiding the liquid to the right. The maximum aperture of the left end of the middle section of the fourth central through hole is larger than the inner diameter of the outer cavity, which is conducive to discharge.

[0019] (3) The flexible quick exhaust valve of the present invention is made of corrosion-resistant PP and PVDF materials, which can be used in various harsh environments. It has excellent chemical corrosion resistance, good high temperature resistance and oxidation resistance, and can be applied to the flow of highly corrosive media and non-conductive media as well as various liquids. Therefore, it is widely used in the semiconductor industry and has achieved good social and economic benefits. The flexible quick exhaust valve of the present invention adopts advanced processing technology and the material is nano-modified to improve the corrosion resistance, pressure resistance and impact resistance of the product, and has good measurement accuracy and stability.

[0020] (4) The flexible quick exhaust valve of the present invention is connected to the inlet connector and the outlet connector by threaded connection, and the two ends of the valve body and the pipeline are connected by oil-free threaded sleeves. It has a compact structure, good sealing effect, easy disassembly and installation; it adopts a pressure self-tightening sealing structure, and the sealing ring is made of FPM material. The higher the medium pressure, the better the sealing performance; the valve core assembly is a piston structure with low resistance, strong corrosion resistance and long service life. It is particularly suitable for the semiconductor industry with high-purity chemical fluid processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural schematic diagram (front view) of a flexible quick exhaust valve of the present invention;

[0022] Figure 2 for Figure 1 Left view of;

[0023] Figure 3 for Figure 2 AA section view;

[0024] Figure 4 A schematic diagram of the three-dimensional structure of a flexible quick exhaust valve of the present invention;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the valve body of the movable quick exhaust valve of the present invention;

[0026] Figure 6 for Figure 3 The schematic diagram of the union-type quick exhaust valve shown is in the open state.

[0027] The symbols in the above drawings are as follows:

[0028] Valve body 10, inner cavity 10-1, outer cavity 10-2, open valve inlet end N1, closed valve inlet end N2, first air channel H1, second air channel H2, valve body end cover 11, inlet end connector 12, outlet end connector 13, first sealing ring 14, second sealing ring 15, third sealing ring 16, fourth sealing ring 17, screw 18, screw cover 19,

[0029] Valve core 21, piston 22, fifth sealing ring 23,

[0030] Inlet end socket 31, oil nut 32, outlet end socket 33,

[0031] The first air intake space S1 and the second air intake space S2. DETAILED DESCRIPTION

[0032] (Example 1)

[0033] See Figures 1 to 4 The movable quick exhaust valve of this embodiment includes a valve body assembly, a valve core assembly capable of performing left and right piston motion relative to the valve body assembly, and a socket assembly for connecting to a pipeline.

[0034] The valve body assembly includes a valve body 10, a valve body inner end cover 11, an inlet end connector 12, an outlet end connector 13, a first sealing ring 14, a second sealing ring 15, a third sealing ring 16, a fourth sealing ring 17, screws 18 and a screw cover plate 19. Figure 5The valve body 10 includes a tubular outer cavity 10-2 and a tubular inner cavity 10-1 arranged in the center of the outer cavity 10-2. The left and right ends of the outer cavity 10-2 are stepped, and the outer edges of the left and right ends of the outer cavity 10-2 are each provided with 8 evenly spaced blind holes with internal threads; the inner cavity 10-1 is connected to the inner wall of the outer cavity 10-2 by its outer periphery front and rear, so that the inner cavity of the entire valve body 10 has a first central through hole with a longitudinal section of 8-shaped and passing through the left and right sides; the inner cavity 10-1 opens to the right, and the right end opening is stepped, and the right end opening of the inner cavity 10-1 is The inner end has an internal thread, and a first sealing ring groove is provided on the left side of the internal thread part; a second central through hole is provided on the left end face of the inner cavity 10-1, and a second sealing ring groove is provided in the middle of the hole wall at the second central through hole; the outer front part of the outer cavity 10-2 is provided with two ventilation ends arranged on the left and right sides that are connected to the inner cavity of the inner cavity 10-1, of which the one on the left is the open valve air inlet end N1, and the one on the right is the closed valve air inlet end N2. The open valve air inlet end N1 is connected to the left part of the inner wall of the inner cavity 10-1 through the first air channel H1, and the closed valve air inlet end N2 is connected to the right part of the inner wall of the inner cavity 10-1 through the second air channel H2. The shape of the valve body inner end cap 11 corresponds to the stepped opening at the right end of the inner cavity 10-1. It includes a head and a threaded rod connected to the right side of the head. The rightmost end of the threaded rod is provided with a first sealing ring half groove corresponding to the first sealing ring groove. The valve body inner end cap 11 is screwed onto the right end of the inner cavity 10-1 of the valve body 10 by its threaded rod, thereby sealing the right end of the inner cavity 10-1. The first sealing ring 14 is disposed in the first sealing ring groove and the first sealing ring half groove to provide a seal. The second sealing ring 15 is disposed in the second sealing ring groove. The inlet connector 12 includes a disc, a connecting neck connected to the left side of the disc and a limiting neck connected to the right side of the disc, and the disc is provided with a number of countersunk holes corresponding to the blind holes of the outer cavity 10-2; the shape of the limiting neck corresponds to the stepped portion at the left end of the outer cavity 10-2, and the outer periphery of the limiting neck is provided with an annular third sealing ring groove; the connecting neck has an external thread, and the left end face of the connecting neck is provided with an annular fourth sealing ring groove opening to the left; the third central through hole of the entire inlet connector 12 is in the shape of three sections, with the left section hole being smaller and the right section hole being larger, wherein the left section hole and the right section hole are both circular holes, and the middle section hole is a trumpet-shaped hole with a smaller left side and a larger right side, and the maximum aperture at the right end of the middle section hole is smaller than the inner diameter of the outer cavity 10-2. The outlet connector 13 is symmetrically arranged with the inlet connector 12, comprising a disc, a connecting neck connected to the right side of the disc, and a stopper neck connected to the left side of the disc. The outlet connector 13 differs from the inlet connector 12 in that the fourth central through hole of the entire outlet connector 13 is arranged in three sections, with the left section larger than the right section. The left and right sections are both circular holes, while the middle section is a trumpet-shaped hole, with the left section larger than the right section. The maximum diameter of the middle section at the left end is larger than the inner diameter of the outer cavity 10-2. Two third sealing rings 16 are disposed in corresponding third sealing ring grooves, and two fourth sealing rings 17 are disposed in corresponding fourth sealing ring grooves.The inlet connector 12 is connected to the left side of the valve body 10 by fasteners, and the outlet connector 13 is connected to the right side of the valve body 10 by fasteners. Specifically, the inlet connector 12 is embedded in the left end step portion of the outer cavity 10-2 of the valve body 10 by its limiting neck, and then 8 screws 18 are passed through the corresponding countersunk holes of the inlet connector 12 and screwed into the internal threaded blind hole of the outer cavity 10-2, and then the corresponding screw cover 19 is tightly fitted and buckled. The outlet connector 13 is embedded in the right end step portion of the outer cavity 10-2 of the valve body 10 by its limiting neck, and then 8 screws 18 are passed through the corresponding countersunk holes of the outlet connector 13 and screwed into the internal threaded blind hole of the outer cavity 10-2, and then the corresponding screw cover 19 is tightly fitted and buckled.

[0035] The valve core assembly includes a valve core 21, a piston 22, and a fifth sealing ring 23. The left portion of the valve core 21 is truncated, with a smaller left portion and a larger right portion, while the right portion is disc-shaped. The left diameter of the left portion of the valve core 21 is smaller than the diameter of the left hole of the inlet connector 12, while the right diameter of the left portion is larger than the diameter of the left hole of the inlet connector 12. A piston blind hole with an internal thread is provided in the center of the right end surface of the valve core 21. The piston 22 includes a rod and a stopper disc provided on the right side of the rod. The left end of the rod is provided with an external thread corresponding to the piston blind hole. The outer circumference of the stopper disc is provided with an annular fifth sealing ring groove. The left and right edges of the stopper disc are chamfered. There is a 1 mm drop between the right end surface of the stopper disc and the right end surface of the rod. The outer diameter of the rod of the piston 22 corresponds to the diameter of the second central through hole of the valve body 10, and the outer diameter of the stopper disc of the piston 22 corresponds to the inner diameter of the inner cavity 10-1 of the valve body 10. The piston 22 is connected to the valve core 21 by its stem through the second central through hole of the inner cavity 10-1 of the valve body 10, and the external thread of the stem is screwed into the piston blind hole of the valve core 21. The limit plate of the piston 22 is slidably arranged in the inner cavity 10-1 of the valve body 10. Figure 3 When the piston 22 is at the far left, the valve core 21 is blocked by the right end of the left hole of the inlet end connector 12 by its truncated cone-shaped left portion. Therefore, an annular first inlet space S1 communicating with the first air channel H1 exists between the left end surface of the chamfered limiting disc portion of the piston 22 and the left wall of the inner cavity 10-1. Figure 4 When piston 22 is at its rightmost position, the right end of the piston 22's rod is blocked by the left end of the valve body inner end cap 11. An annular second air intake space S2, which is in communication with the second air passage H2, exists between the right end of the chamfered stopper disc of piston 22 and the valve body inner end cap 11. A fifth sealing ring 23 is positioned within the fifth sealing ring groove to provide a seal.

[0036] The socket assembly includes an inlet socket 31, an oil supply nut 32 and an outlet socket 33. The inlet socket 31 includes a pipe portion and a connecting portion connected to the right side of the pipe portion. The shape of the connecting portion corresponds to the left end of the inlet connector 12, and the connecting portion has an external thread. The outlet socket 33 is symmetrically arranged with the inlet socket 31. One oil supply nut 32 is screwed on the external thread of the inlet socket 31 and the inlet connector 12 to connect the oil, and another oil supply nut 32 is screwed on the external thread of the outlet socket 33 and the outlet connector 13 to connect the oil; the fourth sealing ring 17 seals between the inlet socket 31 and the inlet connector 12, and between the outlet socket 33 and the outlet connector 13.

[0037] The above-mentioned valve body 10, valve body inner end cover 11, inlet connector 12, outlet connector 13, screw cover plate 19, piston 22 and oil nut 32 are all made of corrosion-resistant PP material, the valve core 21 is made of PTFE material with better corrosion resistance, the inlet socket 31 is made of PVDF material, the outlet socket 33 is made of PVC-U material, the first sealing ring 14, the second sealing ring 15, the third sealing ring 16, the fourth sealing ring 17, and the fifth sealing ring 23 are all FPM sealing rings, and the screw 18 is made of 304L stainless steel.

[0038] When the movable quick exhaust valve of this embodiment is used, the entire movable quick exhaust valve is connected to the liquid inlet pipeline by the inlet end socket 31, and the outlet end socket 33 is connected to the liquid discharge pipeline. The valve opening inlet end N1 and the valve closing inlet end N2 are respectively connected to the interface of the gas source by thread. The inlet drives the piston 22 to move slowly through the valve opening inlet end N1 and the valve closing inlet end N2 to realize the opening and closing of the entire movable quick exhaust valve. Specifically, see Figure 3 At this time, the flexible quick exhaust valve is in a closed state, and the entire valve core assembly is at the far left end. The valve core 21, with its truncated cone-shaped left part, abuts against the right end of the left section hole of the inlet connector 12 at a right angle to close the liquid channel. After the flexible quick exhaust valve is opened, the closed valve inlet end N2 is depressurized, and the open valve inlet end N1 is inflated. The gas enters the first inlet space S1 through the first air channel H1, causing the piston 22 to move rightward with the valve core 21. The liquid passes through the 8-shaped first central through hole of the valve body 10 and enters the outlet connector 13 and the outlet socket 33 to begin to discharge. When the piston 22 moves rightward until the right end surface of the rod of the piston 22 abuts against the left end surface of the end cover 11 in the valve body, the entire flexible quick exhaust valve is fully opened, and the liquid is discharged at the highest flow rate. Figure 6As shown, the third central through hole of the inlet connector 12, which is in a three-segmented shape with a smaller left end and a larger right end, facilitates directing the liquid to the right. The maximum diameter of the middle hole of the third central through hole at the right end is smaller than the inner diameter of the outer cavity 10-2, facilitating the direction of the liquid to the first central through hole. The fourth central through hole of the outlet connector 13, which is in a three-segmented shape with a larger left end and a smaller right end, also facilitates directing the liquid to the right. The maximum diameter of the middle hole of the fourth central through hole at the left end is larger than the inner diameter of the outer cavity 10-2, facilitating the discharge. When the articulated quick exhaust valve is in an open state and needs to be closed, after the closing operation of the articulated quick exhaust valve is implemented, the open valve inlet end N1 releases pressure, and the closed valve inlet end N2 is filled with gas. Gas enters the second air intake space S2 through the second air channel H2 and pushes the piston 22 to the left until the valve core 21 is blocked by the right-angle portion of the left hole of the inlet connector 12, and the entire articulated quick exhaust valve is closed.

[0039] Obviously, the above embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be practiced. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all possible embodiments here. However, such obvious variations or modifications arising from the spirit of the present invention remain within the scope of protection of the present invention.

Claims

1. A flexible quick exhaust valve, characterized by: It includes a valve body assembly, a valve core assembly capable of performing left and right piston motion relative to the valve body assembly, and a socket assembly for connecting to a pipeline. The valve core assembly and the socket assembly are both installed on the valve body assembly. The valve body assembly comprises a valve body (10) and a valve body inner end cover (11); the valve body (10) comprises a tubular outer cavity (10-2) and a tubular inner cavity (10-1) arranged in the center of the outer cavity (10-2); the inner cavity (10-1) is connected to the inner wall of the outer cavity (10-2) through its outer periphery front and rear parts, so that the inner cavity of the entire valve body (10) has a first central through hole with a longitudinal cross section in the shape of an 8 and extending left and right; the inner cavity (10-1) opens to the right, and a second central through hole is provided on the left end face of the inner cavity (10-1); the outer cavity (10-2) The front portion of the outer periphery is provided with two ventilation ends arranged on the left and right sides and communicating with the inner cavity of the inner cavity (10-1), wherein the one located on the left is the open valve air inlet end (N1), and the one located on the right is the closed valve air inlet end (N2); the open valve air inlet end (N1) is communicated with the left portion of the inner wall of the inner cavity (10-1) through the first air channel (H1), and the closed valve air inlet end (N2) is communicated with the right portion of the inner wall of the inner cavity (10-1) through the second air channel (H2); the valve body inner end cover (11) is installed at the right end of the inner cavity (10-1) of the valve body (10) to close the right end of the inner cavity (10-1); The valve core assembly comprises a valve core (21), a piston (22) and a fifth sealing ring (23); the left portion of the valve core (21) is in the shape of a truncated cone with a smaller left portion and a larger right portion, and the right portion is in the shape of a disc; the piston (22) comprises a rod portion and a limiting disc portion arranged on the right portion of the rod portion; the outer peripheral surface of the limiting disc portion of the piston (22) is provided with an annular fifth sealing ring groove; the left and right end edges of the limiting disc portion are both provided with chamfers; the outer diameter of the rod portion of the piston (22) corresponds to the aperture of the second central through hole of the valve body (10), and the outer diameter of the limiting disc portion of the piston (22) corresponds to the inner diameter of the inner cavity (10-1) of the valve body (10); the piston (22) is connected to the valve core (21) after its rod portion passes through the second central through hole of the inner cavity (10-1) of the valve body (10) and is connected to the valve core (21) ) transmission connection, the limit plate portion of the piston (22) is slidingly arranged in the inner cavity (10-1) of the valve body (10); when the piston (22) is located at the leftmost position, an annular first air intake space (S1) that is connected to the first air channel (H1) exists between the left end face of the limit plate portion with a chamfer of the piston (22) and the left wall of the inner cavity (10-1); when the piston (22) is located at the rightmost position, the right end face of the rod portion of the piston (22) is blocked by the left end face of the inner end cover (11) of the valve body, and an annular second air intake space (S2) that is connected to the second air channel (H2) exists between the right end face of the limit plate portion with a chamfer of the piston (22) and the inner end cover (11) of the valve body; the fifth sealing ring (23) is arranged in the fifth sealing ring groove for sealing.

2. The flexible quick exhaust valve according to claim 1, characterized in that: The valve body assembly further includes a first sealing ring (14) and a second sealing ring (15); the right end opening of the inner cavity (10-1) of the valve body (10) is stepped, the inner end of the right end opening of the inner cavity (10-1) has an internal thread, and a first sealing ring groove is provided on the left side of the internal thread portion; a second sealing ring groove is provided in the middle of the hole wall of the second central through hole of the inner cavity (10-1); the shape of the valve body inner end cover (11) corresponds to the right end step opening of the inner cavity (10-1), including a head and a threaded rod connected to the right side of the head, the rightmost end of the threaded rod is provided with a first sealing ring half groove corresponding to the first sealing ring groove, the valve body inner end cover (11) is screwed and installed on the right end of the inner cavity (10-1) of the valve body (10) by its threaded rod to close the right end of the inner cavity (10-1), the first sealing ring (14) is arranged in the first sealing ring groove and the first sealing ring half groove for sealing; the second sealing ring (15) is arranged in the second sealing ring groove.

3. The flexible quick exhaust valve according to claim 1, characterized in that: A piston blind hole with an internal thread is provided at the center of the right end face of the valve core (21); an external thread corresponding to the piston blind hole is provided at the left end of the rod portion of the piston (22); a drop of 1 mm is provided between the right end face of the limit plate portion and the right end face of the rod portion; the piston (22) is screwed and connected to the piston blind hole of the valve core (21) via the external thread portion of the rod portion.

4. The flexible quick exhaust valve according to claim 1, characterized in that: The valve body assembly further comprises an inlet connector (12), an outlet connector (13) and a third sealing ring (16); the left and right ends of the outer cavity (10-2) of the valve body (10) are stepped; the inlet connector (12) comprises a disc, a connecting neck connected to the left side of the disc and a limiting neck connected to the right side of the disc; the shape of the limiting neck corresponds to the stepped portion at the left end of the outer cavity (10-2), and an annular third sealing ring groove is provided on the outer periphery of the limiting neck; the third central through hole of the entire inlet connector (12) is in the shape of three sections, with the left section hole being smaller and the right section hole being larger, wherein the left section hole and the right section hole are both circular holes, the middle section hole is a trumpet-shaped hole with a smaller left side and a larger right side, and the maximum aperture at the right end of the middle section hole is smaller than the inner diameter of the outer cavity (10-2); the outlet connector (13) is symmetrically arranged with the inlet connector (12), comprising a disc, a connecting neck connected to the right side of the disc, and a limiting neck connected to the left side of the disc; the outlet connector (13) differs from the inlet connector (12) in that: the fourth central through hole of the entire outlet connector (13) is in a three-section shape with a larger left portion and a smaller right portion, wherein the left section hole and the right section hole are both circular holes, the middle section hole is a trumpet-shaped hole with a larger left portion and a smaller right portion, and the maximum aperture at the left end of the middle section hole is larger than the inner diameter of the outer cavity (10-2); two third sealing rings (16) are arranged in corresponding third sealing ring grooves; the inlet connector (12) is connected to the left side of the valve body (10) by a fastener, and the outlet connector (13) is connected to the right side of the valve body (10) by a fastener; The left diameter of the left portion of the valve core (21) is smaller than the aperture of the left section hole of the inlet end connector (12), and the right diameter of the left portion is larger than the aperture of the left section hole of the inlet end connector (12).

5. The flexible quick exhaust valve according to claim 4, characterized in that: The valve body assembly further includes a screw (18) and a screw cover (19); the screw cover (19) is made of PP material; the outer edges of the left and right ends of the outer cavity (10-2) of the valve body (10) are each provided with eight blind holes with internal threads at even intervals; The disks of the inlet connector (12) and the outlet connector (13) are both provided with countersunk holes corresponding in number to the blind holes of the outer cavity (10-2); the inlet connector (12) is embedded in the left end step portion of the outer cavity (10-2) of the valve body (10) by its limiting neck, and then screwed into the internal threaded blind hole of the outer cavity (10-2) after passing through the corresponding countersunk holes of the inlet connector (12) by 8 screws (18), and then tightly fitted with the corresponding screw cover (19); the outlet connector (13) is embedded in the right end step portion of the outer cavity (10-2) of the valve body (10) by its limiting neck, and then screwed into the internal threaded blind hole of the outer cavity (10-2) after passing through the corresponding countersunk holes of the outlet connector (13), and then tightly fitted with the corresponding screw cover (19).

6. The flexible quick exhaust valve according to claim 4, characterized in that: The valve body assembly further includes a fourth sealing ring (17); the left end surfaces of the connection necks of the inlet connector (12) and the outlet connector (13) are each provided with an annular fourth sealing ring groove with an opening facing left; two fourth sealing rings (17) are arranged in the corresponding fourth sealing ring grooves; the connection necks of the inlet connector (12) and the outlet connector (13) are each provided with an external thread; The socket assembly includes an inlet socket (31), an oil supply nut (32) and an outlet socket (33); the inlet socket (31) includes a pipe portion and a connecting portion connected to the right side of the pipe portion, the shape of the connecting portion corresponds to the left end of the inlet connector (12), and the connecting portion has an external thread; the outlet socket (33) is symmetrically arranged with the inlet socket (31); one oil supply nut (32) is screwed on the external thread of the inlet socket (31) and the inlet connector (12) to form an oil supply connection, and another oil supply nut (32) is screwed on the external thread of the outlet socket (33) and the outlet connector (13) to form an oil supply connection; a fourth sealing ring (17) is sealed between the inlet socket (31) and the inlet connector (12), and between the outlet socket (33) and the outlet connector (13).

7. The flexible quick exhaust valve according to claim 6, characterized in that: The valve body inner end cover (11), the inlet end connector (12), the outlet end connector (13), the piston (22) and the oil nut (32) are all made of PP material, the valve core (21) is made of PTFE material, the inlet end socket (31) is made of PVDF material, and the outlet end socket (33) is made of PVC-U material.

8. The flexible quick exhaust valve according to claim 6, characterized in that: The working method of the movable quick exhaust valve is that when the entire valve core assembly is at the leftmost end, the valve core (21) is pressed against the right end of the left section hole of the inlet end connector (12) by its truncated cone-shaped left part to close the liquid channel. After the opening control of the movable quick exhaust valve is implemented, the closed valve inlet end (N2) is depressurized, and the open valve inlet end (N1) is inflated. The gas enters the first inlet space (S1) through the first air channel (H1), causing the piston (22) to move the valve core (21) to the right. The liquid passes through the 8-shaped first central through hole of the valve body (10) and enters the outlet end connector (13) and the outlet end socket (33) to start discharging. When the piston (22) moves to the right until the right end face of the rod of the piston (22) abuts against the left end face of the end cover (11) in the valve body, the entire flexible quick exhaust valve is fully opened, and the liquid is discharged at the highest flow rate; when the flexible quick exhaust valve is in the open state and needs to be closed, after the closing control of the flexible quick exhaust valve is implemented, the open valve inlet end (N1) is depressurized, and the closed valve inlet end (N2) is inflated, and the gas enters the second inlet space (S2) through the second gas channel (H2) and pushes the piston (22) to the left until the valve core (21) is blocked by the right-angled portion at the right end of the left section hole of the inlet end connector (12), and the entire flexible quick exhaust valve is closed.

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