Pressure-adjustable automatic inflation and deflation valve

Abstract

The utility model discloses an automatic inflating and deflating valve with adjustable pressure. The automatic inflating and deflating valve comprises a quick-screwing air nozzle (2), an inflating nozzle transition piece (3), an inflating nozzle valve body (8), a first O-shaped sealing ring (7) and an ejector pin assembly, the left end of the charging connector valve body (8) is in threaded connection with the right end of the charging connector transition piece (3); an inner cavity of the inflation nozzle valve body (8) comprises a left cavity, a right cavity and a sliding way communicating the left cavity with the right cavity, the ejector pin assembly is arranged in the left cavity and the sliding way, and a first O-shaped sealing ring (7) is arranged between the ejector pin assembly and a left side opening of the sliding way. When the quick-screwing air nozzle (2) is connected to the right end of the air charging nozzle valve body (8), the air charging and discharging valve is used as an air charging valve; and when the quick-screwing air nozzle (2) is connected to the left end of the inflating nozzle transition piece (3), the inflating and deflating valve is used as a deflating valve. According to the utility model, the switching between the inflation function and the deflation function can be realized, and the universality of the valve is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas valves and relates to a pressure-adjustable automatic gas charging and discharging valve. Background Art

[0002] Optics is a complex and sophisticated discipline with significant application prospects in numerous fields, including advanced manufacturing, military defense, scientific research, and healthcare. Due to the inherent physical properties of optics, precision optical systems often require a dry, clean environment to ensure accuracy and stability. When optical systems are used for extended periods in environments with high humidity, high salt spray, or large temperature swings between day and night, corrosion from the external environment can damage key components. Therefore, regular nitrogen exchange within the optical system is essential to maintain a dry and clean internal environment. Furthermore, to ensure that the optical system performs at high altitudes at the same level as at lower altitudes, a certain positive pressure must be maintained within the optical chamber to ensure stable pressure conditions despite environmental fluctuations. Therefore, to achieve gas exchange and pressure maintenance within the optical chamber, and to accommodate diverse usage scenarios and pressure requirements, a valve is needed that can automatically charge and discharge gas, maintain pressure, and provide a seal and pressure regulation function. Utility Model Content

[0003] (1) Purpose of the utility model

[0004] The purpose of the utility model is to provide a pressure-adjustable automatic gas filling and discharging valve for a precision optical system, which can realize automatic gas filling and discharging, adjustable sealing pressure and interchangeable filling and discharging functions.

[0005] (2) Technical solution

[0006] In order to solve the above technical problems, the utility model provides a pressure-adjustable automatic inflation and deflation valve, which includes: a quick-twist air nozzle 2, an inflation nozzle transition piece 3, an inflation nozzle valve body 8, a first O-ring 7 and a ejector pin assembly; the left end of the inflation nozzle valve body 8 is connected to the right end of the inflation nozzle transition piece 3 through a thread; the inner cavity of the inflation nozzle valve body 8 includes a left cavity, a right cavity and a slide connecting the left cavity and the right cavity, the ejector pin assembly is arranged in the left cavity and the slide, and a first O-ring 7 is provided between the ejector pin assembly and the left side mouth of the slide; when the quick-twist air nozzle 2 is connected to the right end of the inflation nozzle valve body 8, the inflation and deflation valve is used as an inflation valve; when the quick-twist air nozzle 2 is connected to the left end of the inflation nozzle transition piece 3, the inflation and deflation valve is used as an deflation valve.

[0007] Among them, the ejector pin assembly includes a regulating valve cover 4, a pressure spring 5, and an inflation nozzle ejector pin 6; the regulating valve cover 4 is connected to the inner wall of the left end of the left cavity of the inflation nozzle valve body 8 through a thread, the regulating valve cover 4 has a center opening, one end of the inflation nozzle ejector pin 6 passes through the center hole of the regulating valve cover 4, and the other end of the inflation nozzle ejector pin 6 passes through the slide; an annular retaining ring is provided in the middle of the inflation nozzle ejector pin 6, the pressure spring 5 is sleeved on the inflation nozzle ejector pin 6 and is located between the regulating valve cover 4 and the annular retaining ring, and the first O-ring 7 is sleeved on the inflation nozzle ejector pin 6 and is located on the right side of the annular retaining ring.

[0008] The left side opening of the slideway is a smooth slope with an angle of 45°. The first O-ring 7 is squeezed between the annular retaining ring and the smooth slope, and the 45° smooth slope serves as a sealing surface.

[0009] A small baffle ring is further provided on the inflation nozzle ejector pin 6 , and the small baffle ring is located on the right side of the annular baffle ring, and the first O-ring 7 is located between the annular baffle ring and the small baffle ring.

[0010] Wherein, the outer diameter of the annular retaining ring is larger than the inner diameter of the slideway, and the outer diameter of the small retaining ring is not larger than the inner diameter of the slideway.

[0011] Among them, when the charging and discharging valve is used as an inflation valve, the left end of the inflation nozzle transition piece 3 is connected to the airtight equipment through an M10×1 external thread, the right end of the inflation nozzle transition piece 3 is connected to the inflation nozzle valve body 8 through a precision thread, and the right end of the inflation nozzle valve body 8 is connected to the quick-screw air nozzle 2 through an M10×1 external thread. Inflation is performed when the inflation pressure is greater than the sealing pressure.

[0012] Among them, when the inflation and deflation valve is used as an air release valve, the right end of the inflation nozzle transition piece 3 is connected to the inflation nozzle valve body 8 through a precision thread, the left end of the inflation nozzle transition piece 3 is connected to the quick-screw air nozzle 2 through an M10×1 external thread, and the right end of the inflation nozzle valve body 8 is connected to the airtight equipment through an M10×1 external thread. When the internal air pressure of the equipment is greater than the sealing pressure, deflation is performed.

[0013] Wherein, a second O-ring 9 is respectively provided at the connection between the inflation nozzle valve body 8, the inflation nozzle transition piece 3 and the quick-screw air nozzle 2.

[0014] The first O-ring 7 and the second O-ring 9 are made of silicone rubber that can be used in a wide temperature range of -40°C to +60°C; and the remaining structural parts are made of 304 stainless steel.

[0015] There are circular vent holes on the quick-twist air nozzle valve body 8 and the regulating valve cover 4.

[0016] (3) Beneficial effects

[0017] The pressure-adjustable automatic charging and discharging valve provided by the above technical solution has the following beneficial effects:

[0018] (1) The utility model forms a good airtight structure through the mutual cooperation between the inflation nozzle valve body, inflation nozzle transition piece, inflation nozzle ejector pin, regulating valve cover, pressure spring and other structural parts and the O-ring, and can be used and achieve airtightness in a wide temperature range of -40℃ to +60℃, in a humid and hot environment, high salt fog, a large temperature difference between day and night, and a high altitude environment.

[0019] (2) The utility model changes the compression amount of the pressure spring by adjusting the length of the threaded fit between the regulating valve cover and the inflation nozzle valve body, thereby changing the sealing pressure, which can meet the sealing pressure requirements of different equipment and different conditions.

[0020] (3) The utility model sets the sealing pressure by the compression amount of the pressure spring. When the filling and deflation pressures are greater than the sealing pressure, the filling and deflation functions can be automatically realized without manual operation.

[0021] (4) The utility model can realize the switching of the inflation and deflation functions by changing the installation position of the quick-twist air nozzle, thereby realizing the versatility of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front structural diagram of the utility model's pressure-adjustable automatic inflation and deflation valve when used as an inflation valve.

[0023] Figure 2 yes Figure 1 AA cross-sectional view.

[0024] Figure 3 yes Figure 1 Left view of .

[0025] Figure 4 This is a front view structural diagram of the utility model's pressure-adjustable automatic inflation and deflation valve when used as an air release valve.

[0026] Figure 5 yes Figure 4 BB cross-sectional view.

[0027] In the figure: 1-quick-twist air nozzle nut; 2-quick-twist air nozzle; 3-inflating nozzle transition piece; 4-regulating valve cover; 5-pressure spring; 6-inflating nozzle ejector pin; 7-first O-ring; 8-inflating nozzle valve body; 9-second O-ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

[0029] See Figures 1 to 5As shown, the pressure-adjustable automatic inflation and deflation valve of this embodiment includes: a quick-twist air nozzle 2, an inflation nozzle transition piece 3, an inflation nozzle valve body 8, a first O-ring 7 and a ejector pin assembly; the left end of the inflation nozzle valve body 8 is connected to the right end of the inflation nozzle transition piece 3 by a thread; the inner cavity of the inflation nozzle valve body 8 includes a left cavity, a right cavity and a slide connecting the left cavity and the right cavity, the ejector pin assembly is arranged in the left cavity and the slide, and a first O-ring 7 is provided between the ejector pin assembly and the left mouth of the slide; when the quick-twist air nozzle 2 is connected to the right end of the inflation nozzle valve body 8, the inflation and deflation valve is used as an inflation valve; when the quick-twist air nozzle 2 is connected to the left end of the inflation nozzle transition piece 3, the inflation and deflation valve is used as a deflation valve.

[0030] The ejector pin assembly includes a regulating valve cover 4, a pressure spring 5, and an inflation nozzle ejector pin 6; the regulating valve cover 4 is connected to the inner wall of the left end of the left cavity of the inflation nozzle valve body 8 through a thread, the regulating valve cover 4 has a center opening, one end of the inflation nozzle ejector pin 6 passes through the center hole of the regulating valve cover 4, and the other end of the inflation nozzle ejector pin 6 passes through the slideway; an annular retaining ring is provided in the middle of the inflation nozzle ejector pin 6, the pressure spring 5 is sleeved on the inflation nozzle ejector pin 6 and is located between the regulating valve cover 4 and the annular retaining ring, and the first O-ring 7 is sleeved on the inflation nozzle ejector pin 6 and is located on the right side of the annular retaining ring.

[0031] The left opening of the slideway features a smooth, 45° slope. A first O-ring 7 is squeezed between the annular retaining ring and the smooth slope, with the 45° slope acting as a sealing surface. The regulating valve cover 4 is threaded into the left chamber. The compressed pressure spring 5 presses the first O-ring 7 against the smooth slope, achieving an airtight seal. Adjusting the length of the threaded connection between the regulating valve cover 4 and the left chamber of the inflation nozzle body 8 changes the compressed length of the compression spring 5, and thus the sealing pressure, to accommodate the sealing pressure requirements of different devices.

[0032] A small baffle ring is also provided on the inflation nozzle ejector pin 6. The small baffle ring is located on the right side of the annular baffle ring. The first O-type sealing ring 7 is located between the annular baffle ring and the small baffle ring.

[0033] The outer diameter of the annular retaining ring is larger than the inner diameter of the slideway, and the outer diameter of the small retaining ring is not larger than the inner diameter of the slideway.

[0034] When the charging and discharging valve is used as an inflation valve, the left end of the inflation nozzle transition piece 3 is connected to the airtight equipment through an M10×1 external thread, the right end of the inflation nozzle transition piece 3 is connected to the inflation nozzle valve body 8 through a precision thread, and the right end of the inflation nozzle valve body 8 is connected to the quick-screw air nozzle 2 through an M10×1 external thread. Inflation is carried out when the inflation pressure is greater than the sealing pressure.

[0035] When the air charging and discharging valve is used as an air charging valve, after the pagoda head structure at the right end of the quick-twist air nozzle 2 is inserted into the air pipe, the quick-twist air nozzle nut 1 is fixed on the quick-twist air nozzle 2 through a threaded connection, which can compress the air pipe and prevent it from falling off.

[0036] When the inflation and deflation valve is used as an air release valve, the right end of the inflation nozzle transition piece 3 is connected to the inflation nozzle valve body 8 through a precision thread, the left end of the inflation nozzle transition piece 3 is connected to the quick-screw air nozzle 2 through an M10×1 external thread, and the right end of the inflation nozzle valve body 8 is connected to the airtight equipment through an M10×1 external thread. When the internal air pressure of the equipment is greater than the sealing pressure, air is released.

[0037] The left end of the inflation nozzle transition piece 3 and the right end of the inflation nozzle valve body 8 can be connected and fixed to the quick-twist gas nozzle 2 through an M10×1 external thread. The different fixing positions of the quick-twist gas nozzle 2 can realize the switching of the inflation and deflation functions.

[0038] In this embodiment, the sealing pressure can be set by the compression amount of the pressure spring 5. Therefore, the inflation and deflation operations are completely dependent on the sealing pressure and the inflation pressure or the internal pressure of the device, and no manual opening and closing is required, and automatic inflation and deflation operations can be achieved.

[0039] In this embodiment, the first O-ring 7 and the second O-ring 9 are made of high and low temperature resistant silicone rubber material and can be used in a wide temperature range of -40°C to +60°C; the remaining structural parts are made of 304 stainless steel with high mechanical strength and corrosion resistance. After the metal structural parts are processed, they are subjected to a passivation surface treatment to further enhance the metal structure's adaptability to humid, hot, and high salt fog environments.

[0040] The inflation nozzle valve body 8 is the main structure of the air valve. The left and right ends are machined with external thread structures that can be precisely threaded with the inflation nozzle transition piece 3 and the quick-tighten air nozzle 2. The connection points are provided with sealing grooves for installing the second O-ring 9. After the threads are tightened, the inside and outside of the valve body can be isolated to achieve air sealing. A 45° smooth inclined surface is machined inside the valve body. After the first O-ring 7 is pressurized, a sealing surface is formed to achieve air sealing of the internal channel of the air valve. The inner side of the left end of the valve body is machined with precise internal threads and guide structures, which precisely match the regulating valve cover 4 while ensuring that the two structural parts are coaxial, so that the inflation nozzle ejector pin slides smoothly in the slide when it is pushed open. The coaxiality is guaranteed by the machining accuracy to be less than 0.02.

[0041] There are circular vent holes on the quick-twist air nozzle valve body 8 and the regulating valve cover 4, which can ensure rapid flow of gas during ventilation.

[0042] During use, the pressure spring 5 and the first O-ring 7 are inserted into the corresponding mounting positions on the inflation nozzle ejector pin 6. After being inserted, the right end of the inflation nozzle ejector pin 6 is inserted into the slideway on the inflation nozzle valve body 8. The regulating valve cover 4 is then connected to the inflation nozzle valve body 8 through precision threads and gradually screwed in. While screwing in, the other end of the inflation nozzle ejector pin 6 is also inserted into the center hole of the regulating valve cover 4, so that the inflation nozzle ejector pin slides smoothly between the regulating valve cover and the valve body during inflation and deflation operations. When the regulating valve cover is screwed in, the pressure spring 5 is compressed, and the first O-ring 7 is pressed against the 45° smooth inclined surface inside the valve body, achieving an airtight seal in the gas channel. The screw-in depth of the regulating valve cover 4 can be changed each time it is used, thereby changing the compression amount of the pressure spring 5 and adjusting the sealing pressure.

[0043] When used as an inflation valve, the left end of the inflation valve transition piece 3 is connected to the optical device compartment. When the inflation pressure exceeds the sealing pressure, the gas pushes open the inflation nozzle ejector pin 6 to perform the inflation operation. When used as a deflation valve, the right end of the inflation nozzle valve body 8 is connected to the optical device compartment. When the gas pressure inside the device exceeds the sealing pressure, the gas pushes open the inflation nozzle ejector pin 6 to perform the deflation operation.

[0044] Before use, each metal structure should be carefully cleaned with an ultrasonic cleaner and aviation cleaning agent to ensure that the metal structure surface is clean.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pressure-adjustable automatic air filling and discharging valve, characterized in that: include: A quick-twist air nozzle (2), an air-inflating nozzle transition piece (3), an air-inflating nozzle valve body (8), a first O-type sealing ring (7) and an ejector pin assembly; the left end of the air-inflating nozzle valve body (8) is connected to the right end of the air-inflating nozzle transition piece (3) through a thread; the inner cavity of the air-inflating nozzle valve body (8) includes a left cavity, a right cavity and a slideway connecting the left cavity and the right cavity; the ejector pin assembly is arranged in the left cavity and the slideway, and a first O-type sealing ring (7) is arranged between the ejector pin assembly and the left mouth of the slideway; when the quick-twist air nozzle (2) is connected to the right end of the air-inflating nozzle valve body (8), the air-inflating and air-discharging valve is used as an air-inflating valve; when the quick-twist air nozzle (2) is connected to the left end of the air-inflating nozzle transition piece (3), the air-inflating and air-discharging valve is used as an air-discharging valve.

2. The pressure-adjustable automatic charging and discharging valve according to claim 1, characterized in that: The ejector pin assembly comprises a regulating valve cover (4), a pressure spring (5), and an inflation nozzle ejector pin (6); the regulating valve cover (4) is connected to the inner wall of the left end of the left cavity of the inflation nozzle valve body (8) through a thread, the regulating valve cover (4) has a central opening, one end of the inflation nozzle ejector pin (6) passes through the central hole of the regulating valve cover (4), and the other end of the inflation nozzle ejector pin (6) passes into the slideway; an annular retaining ring is provided in the middle of the inflation nozzle ejector pin (6), the pressure spring (5) is sleeved on the inflation nozzle ejector pin (6) and is located between the regulating valve cover (4) and the annular retaining ring, and a first O-type sealing ring (7) is sleeved on the inflation nozzle ejector pin (6) and is located on the right side of the annular retaining ring.

3. The pressure-adjustable automatic charging and discharging valve according to claim 2, characterized in that: The left side opening of the slideway is a smooth inclined surface inclined at 45 degrees, and the first O-type sealing ring (7) is squeezed between the annular retaining ring and the smooth inclined surface, and the 45-degree smooth inclined surface serves as a sealing surface.

4. The pressure-adjustable automatic charging and discharging valve according to claim 3, characterized in that: A small baffle ring is also provided on the inflation nozzle ejector pin (6), and the small baffle ring is located on the right side of the annular baffle ring. The first O-type sealing ring (7) is located between the annular baffle ring and the small baffle ring.

5. The pressure-adjustable automatic charging and discharging valve according to claim 4, characterized in that: The outer diameter of the annular retaining ring is larger than the inner diameter of the slideway, and the outer diameter of the small retaining ring is not larger than the inner diameter of the slideway.

6. The pressure-adjustable automatic charging and discharging valve according to claim 5, characterized in that: When the inflation and deflation valve is used as an inflation valve, the left end of the inflation nozzle transition piece (3) is connected to the airtight device via an M10×1 external thread, the right end of the inflation nozzle transition piece (3) is connected to the inflation nozzle valve body (8) via a precision thread, and the right end of the inflation nozzle valve body (8) is connected to the quick-tightening air nozzle (2) via an M10×1 external thread, and inflation is performed when the inflation pressure is greater than the sealing pressure.

7. The pressure-adjustable automatic charging and discharging valve according to claim 6, characterized in that: When the inflation and deflation valve is used as an air release valve, the right end of the inflation nozzle transition piece (3) is connected to the inflation nozzle valve body (8) through a precision thread, the left end of the inflation nozzle transition piece (3) is connected to the quick-tightening air nozzle (2) through an M10×1 external thread, and the right end of the inflation nozzle valve body (8) is connected to the airtight device through an M10×1 external thread. When the internal air pressure of the device is greater than the sealing pressure, air is released.

8. The pressure-adjustable automatic charging and discharging valve according to claim 7, characterized in that: A second O-type sealing ring (9) is respectively provided at the connection between the inflation nozzle valve body (8), the inflation nozzle transition piece (3) and the quick-twist gas nozzle (2).

9. The pressure-adjustable automatic charging and discharging valve according to claim 8, characterized in that: The first O-type sealing ring (7) and the second O-type sealing ring (9) are made of silicone rubber that can be used in a wide temperature range of -40°C to +60°C; the remaining structural parts are all made of 304 stainless steel.

10. The pressure-adjustable automatic charging and discharging valve according to claim 9, characterized in that: The quick-twist air nozzle valve body (8) and the regulating valve cover (4) are provided with circular vent holes.

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