Plug-type quick exhaust valve

Abstract

The present invention relates to a spigot-type quick exhaust valve, comprising a valve body assembly, a valve core assembly, and a drive assembly, wherein the valve core assembly and the drive assembly are both mounted on the valve body assembly, and the drive assembly drives the valve core assembly to move and control the opening and closing of the liquid-mass channel of the valve body assembly; the valve body assembly comprises a valve body, a nut, a pressure ring, a gasket, and a first sealing ring; an annular limiting ring portion is provided at the bottom of the inner cavity of the nut; the pressure ring comprises a tube portion and a neck portion connected below the tube portion; the gasket is provided with an external thread, and a central through hole of the gasket is formed into four sections that gradually increase in size from top to bottom, with the third hole section being truncated; the nut is screwed onto the valve body by its internal thread; the pressure ring is arranged directly above the limiting ring portion of the nut; the gasket is screwed onto the internal thread of the valve body by its external thread; the first sealing ring is arranged in the fourth hole section of the gasket and is pressed laterally by the inclined surface of the third hole section of the gasket. The spigot-type quick exhaust valve can be connected to the straight pipe end of a quartz tank, and has extremely low precipitation and extremely subtle switching vibration.

Description

Technical Field

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

[0002] The domestic semiconductor and photovoltaic sectors are currently experiencing rapid growth. Silicon wafers are the primary material for photovoltaic power generation, and semiconductor silicon is the primary elemental semiconductor material. Therefore, photovoltaics falls under the umbrella of the semiconductor industry. The continuous development of the semiconductor industry has led to the increasing use of various strong acids, bases, and oxidizing media. Semiconductor manufacturing, particularly chip manufacturing processes such as chip etching, requires pre-treatment: removing oil, dust, dirt, and oxide films from the surface by spraying oil; followed by lamination (laminated film): applying photosensitive adhesive to both sides as required. Re-exposure: transfer imaging through ultraviolet exposure of photomask; re-development: solidify the pattern after exposure, expose the corroded part, and remove the photosensitive resin layer that is not needed for the product; re-drying: remove the photosensitive resin to make the metal surface clean, without adhesion, impurities, etc.; re-etching: corrode the metal with etching solution, and the process involves parameters such as solution concentration, temperature, pressure, speed, etc.; finally peeling (peeling operation): the remaining photosensitive resin layer after etching is expanded by acid-base neutralization method, and the excess photosensitive resin layer is cleaned with clean water and ultrasonic wave; almost every step in the process requires cleaning operation; in order to match The development of domestically independently developed high-end 12-inch wafer cleaning equipment requires extremely low metal precipitation requirements for key component valves. In order to maintain ultra-high purity, the cleaning equipment uses high-purity quartz to make the cleaning wafer container tank. The semiconductor cleaning operation requires the parts to be cleaned to be placed in the quartz tank. The liquid replacement process in the quartz tank must be completed quickly in a short time. The material properties of quartz are similar to those of glass and are fragile. When the valve is connected to the straight pipe end of the quartz tank, the traditional pneumatic ball valve has high ion and particle precipitation, which cannot meet the working conditions. The traditional pneumatic diaphragm valve has large impact vibration, and the quartz tank container is easy to break. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a spigot-type quick exhaust valve which has extremely low precipitation and extremely fine switching vibration and can be connected to the straight pipe end of a quartz tank.

[0004] The technical solution to achieve the purpose of the present invention is to provide a plug-type quick exhaust valve, including a valve body assembly, a valve core assembly and a drive assembly, wherein the valve core assembly and the drive assembly are both mounted on the valve body assembly, and the drive assembly drives the valve core assembly to move to control the opening and closing of the liquid-to-gas passage of the valve body assembly;

[0005] The valve body assembly includes a valve body, a nut, a pressure ring, a gasket and a first sealing ring; the valve body includes a tubular main part and a threaded connection part smaller than the main part connected to the bottom of the main part; the threaded connection part has an external thread, and the inner wall of the threaded connection part is two steps with a small upper part and a large lower part, and the upper part is provided with an internal thread; the bottom of the inner cavity of the nut is provided with an annular limiting ring part, and the inner ring surface of the nut is located above the limiting ring part and is provided with an internal thread corresponding to the external thread of the threaded connection part of the valve body; the pressure ring includes a tube part and a neck connected to the bottom of the tube part, and the inner diameter of the pressure ring is consistent with the inner diameter of the limiting ring part of the nut; the gasket is provided with an upper portion of the threaded connection part of the valve body The internal thread of the segment corresponds to the external thread, and the central through hole of the gasket is in four sections that gradually increase in size from top to bottom, and the third hole segment is in a truncated cone shape and has an inclined surface that can press the sealing ring laterally. The aperture of the second hole segment is consistent with the inner diameter of the pressure ring; the size of the first sealing ring is consistent with the upper end face of the pressure ring; the nut is screwed on the external thread of the threaded connection part of the valve body by its internal thread; the pressure ring is arranged directly above the limiting ring part of the nut; the gasket is screwed on the internal thread of the upper section of the threaded connection part of the valve body by its external thread; the first sealing ring is arranged in the fourth hole segment of the gasket, and is pressed laterally by the inclined surface of the third hole segment of the gasket, and the first sealing ring is located directly above the pressure ring.

[0006] Furthermore, the valve body assembly further includes a first stop screw; a radially arranged first stop screw hole is provided at the upper right end of the outer wall of the threaded connection portion; a radially arranged first stop screw blind hole corresponding to the first stop screw hole is provided at the right end of the outer wall of the pressure ring; the first stop screw is screwed through the first stop screw hole of the valve body and then screwed into the first stop screw blind hole of the gasket, thereby preventing rotation between the valve body and the gasket;

[0007] The outer peripheral surface of the nut is provided with roller patterns; an annular notch for adjusting the tightness of the thread is reserved between the upper end surface of the nut and the lower end surface of the main part of the valve body.

[0008] Furthermore, the main part of the valve body is provided with four drainage holes distributed in a cross on the circumference thereof and communicating with the inner cavity of the main part. The drainage holes are in a waist-shaped shape. The inner wall of the main part is in a two-step shape with a larger upper portion and a smaller lower portion. The upper portion is provided with an internal thread.

[0009] The valve core assembly includes a valve core, a piston, a second sealing ring and a third sealing ring; the valve core includes a core body in the shape of an inverted cone and a connecting column connected to the center above the core body; the upper diameter of the core body is larger than the aperture of the first hole section of the gasket located above, and the lower diameter of the core body is smaller than the aperture of the first hole section of the gasket; the middle and upper part of the connecting column has an external thread, and an annular second sealing ring groove is provided below the external thread part of the connecting column; the piston includes a rod part and a limiting disk part arranged on the upper part of the rod part; a connecting blind hole with an internal thread is provided in the center of the bottom surface of the rod part; the outer peripheral surface of the limiting disk part is provided with an annular third sealing ring groove; the valve core piston is connected together by screwing the connecting blind hole of its rod part on the external thread of the connecting column of the valve core, the second sealing ring is arranged in the second sealing ring groove, and the third sealing ring is arranged in the third sealing ring groove.

[0010] Furthermore, the valve core assembly also includes a support plate; the support plate is disc-shaped with a central through hole, the diameter of the support plate is consistent with the upper diameter of the core body of the valve core, and the aperture of the central through hole of the support plate corresponds to the diameter of the connecting column of the valve core; the support plate is sleeved on the connecting column of the valve core by its central through hole, and is located above the core body, and the bottom surface of the rod of the piston rests on the support plate.

[0011] Furthermore, the drive assembly includes a cavity, an end cover, a fourth sealing ring and a fifth sealing ring; the cavity includes a tubular upper shell and a connecting disk portion connected to the bottom of the upper shell, and the entire cavity is provided with four-section central through holes that gradually become smaller from top to bottom, the first section central through hole located at the top has an internal thread, the aperture of the third section central through hole corresponds to the outer diameter of the limiting disk portion of the piston, the aperture of the fourth section central through hole corresponds to the diameter of the rod portion of the piston, and two annular fifth sealing ring grooves distributed up and down are provided in the fourth section central through hole; the outer peripheral front side surface of the upper shell is provided with two air source connection ports arranged up and down, respectively, a closed valve port located at the top and an open valve port located at the bottom; the closed valve port is provided with a first air channel that passes through the upper part of the third section central through hole of the cavity, and the open valve port is provided with a second air channel that passes through the lower part of the third section central through hole of the cavity; the outer periphery of the connecting disk portion is provided with an external thread corresponding to the internal thread of the upper section of the main part of the valve body; the end cover is provided with a The outer thread of the hole corresponds to the outer thread of the hole, and an annular fourth sealing ring groove is provided on the lower outer periphery of the end cover; the end cover is screwed together by its outer thread and mounted on the inner thread of the first section central through hole of the cavity, and the fourth sealing ring groove of the end cover and the second section central through hole of the cavity are combined to form a closed groove body; the cavity is screwed together by the outer thread of its connecting disk portion on the inner thread of the upper section of the main part of the valve body, and the limiting disk portion of the piston is located in the third section central through hole of the cavity, and the rod of the piston passes downward through the fourth section central through hole of the cavity; when the piston is at the bottom, an annular valve-opening air space that is connected to the second air channel exists between the lower end surface of the limiting disk portion of the piston and the inner wall at the third section central through hole of the cavity, and when the piston is at the top, an annular valve-closing air space that is connected to the first air channel exists between the upper end surface of the limiting disk portion of the piston and the inner wall at the third section central through hole of the cavity and the lower end surface of the end cover; the fourth sealing ring is arranged in the fourth sealing ring groove, and the two fifth sealing rings are arranged in the corresponding fifth sealing ring grooves.

[0012] Furthermore, the drive assembly further includes a second locking screw and a third locking screw; the second locking screw is screwed from top to bottom through any threaded connection intersection between the connecting disk portion of the cavity and the main portion of the valve body to prevent rotation, and the third locking screw is screwed from top to bottom through any threaded connection intersection between the upper shell portion of the cavity and the end cover to prevent rotation;

[0013] The upper end ring surface of the upper shell is provided with 4 first installation process holes distributed in a cross pattern; the upper end ring surface of the connecting disk is provided with 4 second installation process holes distributed in a cross pattern; the middle part of the lower end surface of the connecting disk is provided with an annular piston avoidance groove; the upper end surface of the end cover is provided with 2 third installation process holes.

[0014] Furthermore, the valve body, nut, support plate, piston, cavity and end cover are all made of PP material, the pressure ring, gasket and valve core are all made of PTFE material, and the first sealing ring, second sealing ring, third sealing ring, fourth sealing ring and fifth sealing ring are all made of FPM sealing ring.

[0015] When the cam is in the open position and needs to be closed, the closing operation of the valve core is carried out, the pressure at the opening port is relieved, the air at the closing port is inflated, and the gas enters the closed valve space through the first air channel and pushes the piston downward until the core of the valve core is blocked by the gasket, and the entire cam is closed.

[0016] The present invention has positive effects: (1) The plug-in quick exhaust valve of the present invention is connected by the coaxial central through hole of the nut, pressure ring, and gasket of the valve body assembly and the first sealing ring tightly fitting with the straight tube end of the quartz tank, and the nut presses the first sealing ring upward through the pressure ring, which is pressed by the inclined side of the third hole section of the gasket, so that the gasket squeezes the first sealing ring inward to press the wall of the straight tube end and seal with the straight tube end, which can be connected to the fragile straight tube end of the quartz tank very tightly and with low vibration, solves the problem of intelligent control of liquid discharge at the straight tube end, and is suitable for semiconductor manufacturing.

[0017] (2) The pressure ring, gasket and valve core of the plug-in quick exhaust valve of the present invention are all made of PTFE material, and the valve body, nut, support plate, piston, cavity and end cover are all made of PP material. PTFE has extremely low precipitation characteristics, but the material strength is relatively low and cannot be used as a structural part. The PP material of the valve body, nut, support plate and piston has relatively high strength. The support plate is used as a supporting part in conjunction with the valve core. While meeting the extremely low precipitation requirements of ions and particles, it ensures the strength of the entire valve core and at the same time ensures the sealing performance and service life.

[0018] (3) When the spigot-type quick exhaust valve of the present invention is working, when the entire valve core assembly is at the lowest end, the valve core is pressed against the gasket by its inverted frustum-shaped core body to close the liquid channel, and the valve is in a closed state; after the spigot-type quick exhaust valve is opened, the closed valve port is depressurized, and the open valve port is inflated, and the gas enters the open valve air space through the second air channel, causing the piston to move upward with the valve core and the support plate, and the liquid begins to be discharged through the drainage hole of the valve body. When the piston moves upward until the upper end face of the piston rod hits the lower end face of the end cover, the entire spigot-type quick exhaust valve is fully opened, and the liquid is discharged through the drainage hole of the valve body at the highest flow rate; when the spigot-type quick exhaust valve is in the open state and needs to be closed, after the spigot-type quick exhaust valve is closed, the open valve port is depressurized, and the closed valve port is inflated, and the gas enters the closed valve air space through the first air channel and pushes the piston downward until the core body of the valve core is blocked by the gasket, and the entire spigot-type quick exhaust valve is closed. The designs of the second air channel, the first air channel, the valve-opening air space and the valve-closing air space are relatively ingenious, and the vibration of charging and discharging is relatively small, thereby ensuring the stable opening and closing operation of the quick exhaust valve.

[0019] (4) The spigot-type quick exhaust valve of the present invention adopts a multi-contact surface sealing ring design of the first to fifth sealing rings, which not only ensures sealing but also has a shock-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram (front view) of the spigot-type quick exhaust valve of the present invention;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3 for Figure 1 A top view of

[0023] Figure 4 for Figure 3 BB surface cross-sectional view;

[0024] Figure 5 A schematic diagram of the three-dimensional structure of the spigot-type quick exhaust valve of the present invention;

[0025] Figure 6 A schematic diagram of the three-dimensional structure of the valve body of the spigot-type quick exhaust valve of the present invention;

[0026] Figure 7 A schematic diagram of the three-dimensional structure of the valve core of the spigot-type quick exhaust valve of the present invention;

[0027] Figure 8 A schematic diagram of the three-dimensional structure of the cavity of the spigot-type quick exhaust valve of the present invention;

[0028] Figure 9 for Figure 2The cross-sectional view of the spigot-type quick exhaust valve shown is in the open state.

[0029] The symbols in the above drawings are as follows:

[0030] Valve body 11, main part 11-1, threaded connection part 11-2, drainage hole h1, first anti-rotation screw hole h4, nut 12, pressure ring 13, washer 14, first sealing ring 15, first anti-rotation screw 16,

[0031] Valve core 21, core body 21-1, connecting column 21-2, support plate 22, piston 23, second sealing ring 24, third sealing ring 25,

[0032] Cavity 31, upper shell 31-1, connecting plate 31-2, valve closing port N1, valve opening port N2, first air channel h2, second air channel h3, piston avoidance groove t1, end cover 32, fourth sealing ring 33, fifth sealing ring 34, second anti-rotation screw 35, third anti-rotation screw 36,

[0033] Straight pipe end 4. DETAILED DESCRIPTION

[0034] (Example 1)

[0035] See Figures 1 to 5 The plug-in quick exhaust valve of this embodiment includes a valve body assembly, a valve core assembly and a drive assembly. The valve core assembly and the drive assembly are both installed on the valve body assembly. The drive assembly drives the valve core assembly to control the opening and closing of the liquid channel of the valve body assembly.

[0036] The valve body assembly includes a valve body 11, a nut 12, a pressure ring 13, a gasket 14, a first sealing ring 15 and a first anti-rotation screw 16. Figure 6The valve body 11 comprises a tubular main portion 11-1 and a threaded connection portion 11-2, smaller than the main portion 11-1 and connected to the main portion 11-1 below. Four drainage holes h1, distributed in a cross pattern and extending through the inner cavity of the main portion 11-1, are provided around the main portion 11-1. The drainage holes h1 are oval in shape. The inner wall of the main portion 11-1 is stepped, with the upper portion having internal threads. The threaded connection portion 11-2 has external threads and a stepped inner wall, with the upper portion having internal threads. A radially arranged first stop screw hole h4 is provided at the upper right end of the outer wall of the threaded connection portion 11-2. The outer circumference of the nut 12 is roller-grooved, and an annular retaining ring is provided at the bottom of the inner cavity of the nut 12. The inner surface of the nut 12, located above the retaining ring, has internal threads corresponding to the external threads of the threaded connection portion 11-2 of the valve body 11. The pressure ring 13 consists of a tube and a neck connected below the tube. The inner diameter of the pressure ring 13 matches the inner diameter of the retaining ring portion of the nut 12. The washer 14 has external threads corresponding to the internal threads of the upper section of the threaded connection portion 11-2 of the valve body 11. The central through-hole of the washer 14 is divided into four sections, increasing in size from top to bottom. The third section is truncated cone-shaped and has an inclined surface that can compress the sealing ring. The diameter of the second section matches the inner diameter of the pressure ring 13. A first blind stop screw hole, corresponding to the first stop screw hole h4, is radially arranged at the right end of the outer wall of the pressure ring 13. The size of the first sealing ring 15 matches the upper end face of the pressure ring 13. The internal threads of the nut 12 are screwed onto the external threads of the threaded connection portion 11-2 of the valve body 11. An annular gap is left between the upper end face of the nut 12 and the lower end face of the main portion 11-1 of the valve body 11 to adjust the thread tightness. The pressure ring 13 is positioned directly above the retaining ring portion of the nut 12. The external threads of the washer 14 are screwed onto the internal threads of the upper section of the threaded connection portion 11-2 of the valve body 11. The first sealing ring 15 is positioned in the fourth hole section of the washer 14 and is pressed against the inclined surface of the third hole section of the washer 14. The first sealing ring 15 is located directly above the pressure ring 13. The first stop screw 16 is screwed through the first stop screw hole h4 of the valve body 11 and then into the first stop screw blind hole of the washer 14, thereby preventing rotation between the valve body 11 and the washer 14.

[0037] The valve core assembly includes a valve core 21, a support plate 22, a piston 23, a second sealing ring 24 and a third sealing ring 25. Figure 7The valve core 21 includes an inverted frustum-shaped core body 21-1 and a connecting post 21-2 connected to the center above the core body 21-1. The upper diameter of the core body 21-1 is larger than the diameter of the first hole section of the gasket 14 located above, and the lower diameter of the core body 21-1 is smaller than the diameter of the first hole section of the gasket 14. The upper and middle portions of the connecting post 21-2 have external threads, and an annular second sealing ring groove is provided below the external threaded portion of the connecting post 21-2. The support plate 22 is disc-shaped with a central through hole. The diameter of the support plate 22 is consistent with the upper diameter of the core body 21-1 of the valve core 21, and the diameter of the central through hole of the support plate 22 corresponds to the diameter of the connecting post 21-2 of the valve core 21. The piston 23 includes a rod portion and a limiting disc portion arranged above the rod portion. A connecting blind hole with an internal thread is provided in the center of the bottom surface of the rod portion. An annular third sealing ring groove is provided on the outer circumference of the limiting disc portion. The support plate 22 is sleeved on the connecting column 21-2 of the valve core 21 through its central through hole and is located above the core body 21-1; the piston 23 is screwed on the external thread of the connecting column 21-2 of the valve core 21 through the connecting blind hole of its rod and the bottom surface of the rod of the piston 23 contacts the support plate 22, the second sealing ring 24 is arranged in the second sealing ring groove, and the third sealing ring 25 is arranged in the third sealing ring groove.

[0038] The drive assembly includes a cavity 31, an end cover 32, a fourth sealing ring 33, a fifth sealing ring 34, a second locking screw 35 and a third locking screw 36. Figure 8The cavity 31 includes a tubular upper shell portion 31-1 and a connecting disk portion 31-2 connected to the lower portion of the upper shell portion 31-1. The entire cavity 31 is provided with four-section central through holes that gradually become smaller from top to bottom. The first section of the central through hole at the top has an internal thread. The aperture of the third section of the central through hole corresponds to the outer diameter of the limiting disk portion of the piston 23. The aperture of the fourth section of the central through hole corresponds to the diameter of the rod portion of the piston 23, and two annular fifth sealing ring grooves distributed up and down are provided in the fourth section of the central through hole; the upper end annular surface of the upper shell portion 31-1 is provided with four first installation process holes distributed in a cross pattern, and the outer peripheral front side surface of the upper shell portion 31-1 is provided with a There are two air source connection ports, one above and one below: a closed valve port N1 and a lower open valve port N2. The closed valve port N1 is connected to a first air channel h2, which extends through the upper portion of the central through hole in the third section of the cavity 31. The open valve port N2 is connected to a second air channel h3, which extends through the lower portion of the central through hole in the third section of the cavity 31. The outer periphery of the connecting plate 31-2 is provided with external threads corresponding to the internal threads of the upper section of the main portion 11-1 of the valve body 11. The upper annular surface of the connecting plate 31-2 is provided with four second installation holes arranged in a cross pattern. The middle portion of the lower end surface of the connecting plate 31-2 is provided with an annular piston clearance groove t1. The end cap 32 is provided with external threads corresponding to the internal threads of the central through hole in the first section of the cavity 31. A fourth annular sealing ring groove is provided at the lower periphery of the end cap 32, and two third installation holes are provided on the upper end surface of the end cap 32. The end cap 32 is screwed onto the internal threads of the first central through hole of the cavity 31 by its external threads, and the fourth sealing ring groove of the end cap 32 is combined with the second central through hole of the cavity 31 to form a closed groove. The cavity 31 is screwed onto the internal threads of the upper section of the main portion 11-1 of the valve body 11 by its connecting plate portion 31-2 by its external threads. The stopper portion of the piston 23 is located within the third central through hole of the cavity 31, and the rod of the piston 23 extends downward through the fourth central through hole of the cavity 31. When the piston 23 is at its lowest position, an annular valve-opening air space communicating with the second airway h3 exists between the lower end surface of the stopper portion of the piston 23 and the inner wall of the third central through hole of the cavity 31. When the piston 23 is at its highest position, an annular valve-closing air space communicating with the first airway h2 exists between the upper end surface of the stopper portion of the piston 23, the inner wall of the third central through hole of the cavity 31, and the lower end surface of the end cap 32. The fourth sealing ring 33 is positioned within the fourth sealing ring groove, and two fifth sealing rings 34 are positioned within corresponding fifth sealing ring grooves. A second locking screw 35 is screwed downwardly through any threaded intersection between the connecting plate portion 31-2 of the cavity 31 and the main portion 11-1 of the valve body 11 to prevent rotation. A third locking screw 36 is screwed downwardly through any threaded intersection between the upper shell portion 31-1 of the cavity 31 and the end cap 32 to prevent rotation.

[0039] The valve body 11, nut 12, support plate 22, piston 23, cavity 31 and end cover 32 are all made of corrosion-resistant PP material, the pressure ring 13, gasket 14 and valve core 21 are all made of PTFE material with better corrosion resistance, and the first sealing ring 15, second sealing ring 24, third sealing ring 25, fourth sealing ring 33 and fifth sealing ring 34 are all FPM sealing rings.

[0040] When the spigot-type quick exhaust valve of this embodiment is used, see Figure 9 The entire spigot-type quick exhaust valve is connected by the coaxial central through hole of the nut 12, the pressure ring 13, the gasket 14 of the valve body assembly and the first sealing ring 15, which are tightly fitted with the straight tube end 4 of the quartz tank. The nut 12 presses the first sealing ring 15 upward through the pressure ring 13, which is pressed sideways by the inclined surface of the third hole section of the gasket 14. As a result, the gasket 14 squeezes the first sealing ring 15 inward to contract and press the wall of the straight tube end 4 to seal with the straight tube end 4. The valve closing port N1 and the valve opening port N2 are respectively connected to the interface of the gas source through threaded connection. The air inlet drives the piston 23 to move slowly through the valve closing port N1 and the valve opening port N2 to realize the opening and closing of the entire spigot-type quick exhaust valve. Specifically, see Figure 2 At this time, the spigot-type quick exhaust valve is in a closed state, and the entire valve core assembly is at the lowest end. The valve core 21 is pressed against the gasket 14 by its inverted frustum-shaped core body 21-1 to close the liquid channel. After the spigot-type quick exhaust valve is opened, the closed valve port N1 is depressurized, and the open valve port N2 is inflated. The gas enters the open valve air space through the second air channel h3, causing the piston 23 to move upward with the valve core 21 and the support plate 22, and the liquid begins to be discharged through the discharge hole h1 of the valve body 11. When the piston 23 moves upward until the upper end surface of the rod of the piston 23 hits the lower end surface of the end cover 32, the entire spigot-type quick exhaust valve is fully opened, and the liquid is discharged through the discharge hole h1 of the valve body 11 at the highest flow rate. Figure 9 When the spigot-type quick exhaust valve is in the open state and needs to be closed, after the spigot-type quick exhaust valve closing operation is implemented, the open valve port N2 is depressurized, and the closed valve port N1 is inflated. The gas enters the closed valve air space through the first air channel h2 and pushes the piston 23 downward until the core 21-1 of the valve core 21 is blocked by the gasket 14, and the entire spigot-type quick exhaust valve is closed.

[0041] 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 spigot-type quick exhaust valve, characterized by: It includes a valve body assembly, a valve core assembly and a drive assembly. The valve core assembly and the drive assembly are both installed on the valve body assembly. The drive assembly drives the valve core assembly to move and control the opening and closing of the liquid channel of the valve body assembly. The valve body assembly comprises a valve body (11), a nut (12), a pressure ring (13), a gasket (14) and a first sealing ring (15); the valve body (11) comprises a tubular main part (11-1) and a threaded connection part (11-2) smaller than the main part (11-1) and connected below the main part (11-1); the threaded connection part (11-2) has an external thread, and the inner wall of the threaded connection part (11-2) is in the shape of two steps with a smaller upper part and a larger lower part, and the upper part is provided with an internal thread; an annular limiting ring part is provided at the bottom of the inner cavity of the nut (12), and an inner ring surface of the nut (12) located above the limiting ring part is provided with an internal thread corresponding to the external thread of the threaded connection part (11-2) of the valve body (11); the pressure ring (13) comprises a tube part and a neck connected below the tube part, and the inner diameter of the pressure ring (13) is consistent with the inner diameter of the limiting ring part of the nut (12); the gasket (14) is provided with a hole corresponding to the outer thread of the threaded connection part (11-2) of the valve body (11) 1) of the threaded connection portion (11-2) corresponds to the external thread, the central through hole of the washer (14) is in the shape of four sections that gradually increase in size from top to bottom, and the third hole section is in the shape of a truncated cone and has an inclined surface that can press the sealing ring sideways, the aperture of the second hole section is consistent with the inner diameter of the pressing ring (13); the size of the first sealing ring (15) is consistent with the upper end face of the pressing ring (13); the nut (12) is screwed into the threaded connection portion of the valve body (11) by its internal thread The outer thread of the connecting portion (11-2) is provided on the pressing ring (13) and is arranged directly above the limiting ring portion of the nut (12). The washer (14) is screwed onto the inner thread of the upper portion of the threaded connecting portion (11-2) of the valve body (11) by means of its outer thread. The first sealing ring (15) is provided in the fourth hole section of the washer (14) and is pressed laterally by the inclined surface of the third hole section of the washer (14). The first sealing ring (15) is located directly above the pressing ring (13). The main portion (11-1) of the valve body (11) is provided with four drainage holes (h1) distributed in a cross shape on the circumference thereof and communicating with the inner cavity of the main portion (11-1). The drainage holes (h1) are in a waist-shaped shape. The inner wall of the main portion (11-1) is in a two-step shape with a larger upper portion and a smaller lower portion. The upper portion is provided with an internal thread. The valve core assembly comprises a valve core (21), a piston (23), a second sealing ring (24) and a third sealing ring (25); the valve core (21) comprises a core body (21-1) in the shape of an inverted truncated cone and a connecting column (21-2) connected to the center above the core body (21-1); the upper diameter of the core body (21-1) is larger than the aperture of the first hole section of the gasket (14) located above, and the lower diameter of the core body (21-1) is smaller than the aperture of the first hole section of the gasket (14); the middle and upper part of the connecting column (21-2) has an external thread, and the connecting column (21-2) is connected to the center of the core body (21-1). 2) is provided with an annular second sealing ring groove below the external threaded portion; the piston (23) includes a rod portion and a limiting disc portion provided on the upper portion of the rod portion; a connecting blind hole with an internal thread is provided at the center of the bottom surface of the rod portion; an annular third sealing ring groove is provided on the outer peripheral surface of the limiting disc portion; the valve core (21) and the piston (23) are connected together by screwing the connecting blind hole of the rod portion onto the external thread of the connecting column (21-2) of the valve core (21); the second sealing ring (24) is provided in the second sealing ring groove, and the third sealing ring (25) is provided in the third sealing ring groove.

2. The spigot-type quick exhaust valve according to claim 1, characterized in that: The valve body assembly further includes a first stop screw (16); a radially arranged first stop screw hole (h4) is provided at the upper right end of the outer wall of the threaded connection portion (11-2); a radially arranged first stop screw blind hole corresponding to the first stop screw hole (h4) is provided at the right end of the outer wall of the pressure ring (13); the first stop screw (16) is screwed through the first stop screw hole (h4) of the valve body (11) and then screwed into the first stop screw blind hole of the gasket (14), thereby stopping the valve body (11) and the gasket (14); The outer peripheral surface of the nut (12) is provided with a roller pattern; and an annular notch for adjusting the tightness of the thread is left between the upper end surface of the nut (12) and the lower end surface of the main portion (11-1) of the valve body (11).

3. The spigot-type quick exhaust valve according to claim 1, characterized in that: The valve core assembly further includes a support plate (22); the support plate (22) is in the shape of a disk having a central through hole, the diameter of the support plate (22) is consistent with the upper diameter of the core body (21-1) of the valve core (21), and the aperture of the central through hole of the support plate (22) corresponds to the diameter of the connecting column (21-2) of the valve core (21); the support plate (22) is sleeved on the connecting column (21-2) of the valve core (21) through its central through hole and is located above the core body (21-1), and the bottom surface of the rod of the piston (23) abuts against the support plate (22).

4. The spigot-type quick exhaust valve according to claim 1, characterized in that: The drive assembly includes a cavity (31), an end cover (32), a fourth sealing ring (33) and a fifth sealing ring (34); the cavity (31) includes a tubular upper shell (31-1) and a connecting disk (31-2) connected to the lower part of the upper shell (31-1), and the entire cavity (31) is provided with four sections of central through holes that gradually decrease from top to bottom. The first section of the central through hole located at the top has an internal thread, the aperture of the third section of the central through hole corresponds to the outer diameter of the limiting disk of the piston (23), the aperture of the fourth section of the central through hole corresponds to the diameter of the rod of the piston (23), and two annular fifth through holes distributed up and down are provided in the fourth section of the central through hole. The sealing ring groove is provided on the front side of the outer periphery of the upper shell part (31-1), and two air source connection ports are provided in an upper and lower manner, namely, a closed valve port (N1) located at the upper part and an open valve port (N2) located at the lower part; the closed valve port (N1) is provided with a first air channel (h2) which is communicated with the upper part of the central through hole of the third section of the cavity (31), and the open valve port (N2) is provided with a second air channel (h3) which is communicated with the lower part of the central through hole of the third section of the cavity (31); the outer periphery of the connecting disk part (31-2) is provided with an external thread corresponding to the internal thread of the upper section of the main part (11-1) of the valve body (11); the end cover (32) is provided with a first air channel (h3) which is communicated with the first air channel (h2) of the cavity (31). The outer thread of the central through hole of the first section corresponds to the outer thread of the end cover (32), and the outer lower part of the end cover (32) is provided with an annular fourth sealing ring groove; the end cover (32) is screwed on the inner thread of the first central through hole of the cavity (31) by its outer thread, and the fourth sealing ring groove of the end cover (32) and the second central through hole of the cavity (31) are combined to form a closed groove body; the cavity (31) is screwed on the inner thread of the upper section of the main part (11-1) of the valve body (11) by the outer thread of its connecting disk part (31-2), and the limiting disk part of the piston (23) is located in the third central through hole of the cavity (31), and the rod of the piston (23) passes downward through the cavity (31). 1) of the fourth section central through hole; when the piston (23) is at the bottom, an annular valve-opening air space communicating with the second air channel (h3) exists between the lower end surface of the limiting plate portion of the piston (23) and the inner wall at the third section central through hole of the cavity (31); when the piston (23) is at the top, an annular valve-closing air space communicating with the first air channel (h2) exists between the upper end surface of the limiting plate portion of the piston (23) and the inner wall at the third section central through hole of the cavity (31) and the lower end surface of the end cover (32); the fourth sealing ring (33) is arranged in the fourth sealing ring groove, and the two fifth sealing rings (34) are arranged in the corresponding fifth sealing ring grooves.

5. The spigot-type quick exhaust valve according to claim 4, characterized in that: The drive assembly further includes a second stop screw (35) and a third stop screw (36); the second stop screw (35) is screwed from top to bottom through any threaded connection junction between the connecting disk portion (31-2) of the cavity (31) and the main portion (11-1) of the valve body (11) to stop rotation, and the third stop screw (36) is screwed from top to bottom through any threaded connection junction between the upper shell portion (31-1) of the cavity (31) and the end cover (32) to stop rotation; The upper end annular surface of the upper shell portion (31-1) is provided with four first installation process holes distributed in a cross pattern; the upper end annular surface of the connecting disc portion (31-2) is provided with four second installation process holes distributed in a cross pattern; the middle portion of the lower end surface of the connecting disc portion (31-2) is provided with an annular piston avoidance groove (t1); and the upper end surface of the end cover (32) is provided with two third installation process holes.

6. The spigot-type quick exhaust valve according to claim 4, characterized in that: The valve body (11), nut (12), support plate (22), piston (23), cavity (31) and end cover (32) are all made of PP material, the pressure ring (13), gasket (14) and valve core (21) are all made of PTFE material, and the first sealing ring (15), second sealing ring (24), third sealing ring (25), fourth sealing ring (33) and fifth sealing ring (34) are all made of FPM sealing rings.

7. The spigot-type quick exhaust valve according to claim 4, characterized in that: When the spigot-type quick exhaust valve is in operation, when the entire valve core assembly is at the lowest end, the valve core (21) is pressed against the gasket (14) by its inverted truncated cone-shaped core body (21-1) to close the liquid channel, and the valve is in a closed state; after the spigot-type quick exhaust valve is opened and operated, the closed valve port (N1) is depressurized, and the open valve port (N2) is inflated, and the gas enters the open valve air space through the second air channel (h3), causing the piston (23) to move upward with the valve core (21) and the support plate (22), and the liquid begins to be discharged through the discharge hole (h1) of the valve body (11). When the piston (23) moves upward to When the upper end surface of the rod of the piston (23) contacts the lower end surface of the end cover (32), the entire spigot-type quick exhaust valve is fully opened, and the liquid is discharged through the drain hole (h1) of the valve body (11) at the highest flow rate; when the spigot-type quick exhaust valve is in the open state and needs to be closed, after the closing control of the spigot-type quick exhaust valve is implemented, the open valve port (N2) is depressurized, and the closed valve port (N1) is inflated, and the gas enters the closed valve air space through the first air channel (h2) and pushes the piston (23) downward until the core body (21-1) of the valve core (21) is blocked by the gasket (14), and the entire spigot-type quick exhaust valve is closed.

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