Acid and alkali resistant and corrosion resistant breather valve structure

Abstract

The utility model provides an acid and alkali resistant anti-corrosion breather valve structure which comprises a valve body and a breathing bin, the breathing bin is fixed in the valve body, a negative pressure disc is installed above the breathing bin in an attached mode, a positive pressure disc is arranged below the negative pressure disc and connected with the breathing bin in an attached mode, a positive pressure pipe is arranged below the positive pressure disc, and a negative pressure pipe is arranged below the positive pressure pipe. And the positive pressure pipe is fixedly connected with the breathing bin. When the positive pressure plate exhales gas, the flow speed is increased through the return valve during gas circulation, the gas exhaust efficiency is improved through the high flow speed, and meanwhile, part of gas is prevented from being retained in the breathing bin under the condition that flowing is slow, and when the air pressure in the storage tank is close to the external air pressure and the positive pressure plate falls down, the gas exhaust efficiency is improved. The situation that gas in the breathing bin flows back into the storage tank when the positive pressure disc falls down and is closed is improved through the backflow valve, then the use frequency of the positive pressure disc is reduced, and the service life of the breathing valve structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of breathing valves, in particular to an acid- and alkali-resistant and corrosion-resistant breathing valve structure. Background Art

[0002] A breathing valve refers to a valve that ensures that the storage tank space is isolated from the atmosphere within a certain pressure range, and can communicate with the atmosphere (breathe) when the pressure exceeds or falls below this pressure range. Its function is to prevent the storage tank from being damaged due to overpressure or vacuum, and at the same time reduce the evaporation loss of the stored liquid. The installation of a breathing valve can prevent the storage tank from being damaged due to overpressure or instability due to ultra-vacuum, and plays a certain role in promoting the storage safety of the storage tank.

[0003] The "corrosion-resistant breathing valve" described in patent application number "CN202320157614.5" has a technical solution that, through the provision of knob No. 1, knob No. 2 and external threaded sleeve, makes it easy for the breathing valve to be used by turning knob No. 1 to push the movable plate downward through the thread of the external threaded sleeve, and then the movable plate pushes the negative piston rod through the No. 1 spring to adjust the suction negative pressure on the negative pressure valve disc, and then the movable block is pushed through the No. 2 knob thread, and then the movable block pushes the positive piston rod through the No. 2 spring to adjust the exhaust positive pressure, thereby improving the practicability of the breathing valve, and the corrosion resistance of the breathing valve can be effectively improved through the inorganic coating.

[0004] However, the applicant believes that the device has the following problems when in use. When the breathing valve has almost completed discharging the gas in the storage tank, the pressure difference between the storage tank and the external air pressure is similar, and the gas flow rate is slow, which can easily cause part of the gas to be retained in the valve body. When the valve disc falls or the external gas flows, part of the gas will still return to the tank body, thereby increasing the frequency of gas discharge from the breathing valve, reducing the service life of the breathing valve structure, and is not conducive to practical use.

[0005] To this end, we provide an acid-resistant, alkali-resistant and corrosion-resistant breathing valve structure. Utility Model Content

[0006] The main purpose of the utility model is to provide an acid- and alkali-resistant and corrosion-resistant breathing valve structure, which can effectively solve the problem raised in the background technology that when the breathing valve quickly discharges the gas in the storage tank, the pressure difference between the internal and external air pressures is similar, and the gas flow rate is slow, which easily causes part of the gas to be retained in the valve body. When the valve disc falls or the external gas flows, part of the gas will still return to the tank body.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A kind of acid and alkali resistant and corrosion resistant breathing valve structure comprises a valve body and a breathing chamber, wherein the breathing chamber is fixedly arranged inside the valve body, a negative pressure plate is fittedly installed above the breathing chamber, a positive pressure plate is arranged below the negative pressure plate, and the positive pressure plate is fittedly connected to the breathing chamber, a positive pressure pipe is arranged below the positive pressure plate, and the positive pressure pipe is fixedly connected to the breathing chamber, a reflux valve is arranged in the positive pressure pipe, and the reflux valve is through-connected to the valve body.

[0009] In the above scheme, preferably, a breathing port is fixedly installed on one side of the valve body, and the breathing port is through-connected with the breathing chamber, and a mounting base for mounting and connecting with the storage tank is fixedly connected to the bottom of the valve body.

[0010] In the above scheme, preferably, a connecting pipe is provided on the inner side of the mounting base, and the valve body and the storage tank are connected through the connecting pipe, a sealing cover for sealing is fixedly connected above the valve body, and fixing bolts are embedded and connected on the inner sides of the mounting base and the sealing cover.

[0011] In the above scheme, preferably, telescopic rods are fixedly connected above the negative pressure plate and below the positive pressure plate, one end of the telescopic rod fixedly connected to the negative pressure plate is fixedly connected to the sealing cover, and the telescopic rod fixedly connected to the positive pressure plate is engaged with the positive pressure tube.

[0012] In the above scheme, preferably, the breathing chamber is fixedly installed on the inner side of the valve body, and there is a space for gas circulation between the breathing chamber and the inner wall of the valve body.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has the following beneficial effects: this acid- and alkali-resistant and corrosion-resistant breathing valve structure is equipped with devices such as a positive pressure tube and a reflux valve. When the positive pressure plate exhales the gas, the reflux valve is used to increase the flow rate during gas circulation, and the faster flow rate is used to improve the efficiency of gas discharge. At the same time, it can prevent part of the gas from being retained in the breathing chamber when the flow is slow. When the air pressure in the storage tank is close to the external air pressure and the positive pressure plate falls, the reflux valve is used to improve the situation in which the gas in the breathing chamber flows back to the storage tank when the positive pressure plate falls and closes, thereby reducing the frequency of use of the positive pressure plate and increasing the service life of the breathing valve structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the local structure of the breathing chamber of the utility model.

[0018] Figure 3 It is a schematic cross-sectional view of the internal structure of the valve body of the utility model.

[0019] Figure 4 It is a schematic diagram of the internal structure of the positive pressure tube of the utility model.

[0020] Figure 1-4 In: 1. Valve body; 101. Breathing chamber; 2. Breathing port; 3. Mounting base; 4. Connecting pipe; 5. Sealing cover; 6. Telescopic rod; 7. Negative pressure plate; 8. Positive pressure plate; 9. Positive pressure pipe; 901. Reflux valve. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-4 As shown, in the present embodiment, an acid-base resistant and anti-corrosion breathing valve structure comprises a valve body 1 and a breathing chamber 101, the breathing chamber 101 is fixed to the internal arrangement of the valve body 1, a negative pressure plate 7 is fitted on the top of the breathing chamber 101, a positive pressure plate 8 is provided below the negative pressure plate 7, and the positive pressure plate 8 is fitted and connected to the breathing chamber 101, a positive pressure pipe 9 is provided below the positive pressure plate 8, and the positive pressure pipe 9 is fixedly connected to the breathing chamber 101, a reflux valve 901 is provided in the positive pressure pipe 9, and the reflux valve 901 is connected to the valve body 1 through-connection;

[0023] Specifically, through this arrangement, when the gas pressure inside the storage tank is too high, the gas in the storage tank is introduced into the space between the breathing chamber 101 and the valve body 1 through the connecting pipe 4. When the valve body 1 and the space inside the breathing chamber 101 are filled with gas, the negative pressure plate 7 is always sealed with the breathing chamber 101 under the internal pressure, and the positive pressure plate 8 is lifted under the gas pressure, so that the gas in the valve body 1 and the breathing chamber 101 is exhaled from the positive pressure plate 8 through the positive pressure pipe 9. When the positive pressure plate 8 exhales the gas, since the positive pressure pipe 9 is provided with a reflux valve 901, the reflux valve 901 is used to increase the flow rate when the gas circulates. A faster flow rate is used to improve the efficiency of gas discharge, and at the same time to prevent part of the gas from being retained in the breathing chamber 101 when the flow is slow. Secondly, when the air pressure in the storage tank is close to the external air pressure and the positive pressure plate 8 falls, the design of the reflux valve 901 (this device is similar to the working principle of the fluid passing through the Tesla valve) can improve the situation where there is gas retained in the breathing chamber 101 or the external gas flows into the breathing chamber 101 from the breathing port 2. When the positive pressure plate 8 falls and closes, the gas in the breathing chamber 101 is refluxed into the storage tank, thereby reducing the frequency of use of the positive pressure plate 8 and increasing the service life of the breathing valve structure.

[0024] like Figure 1-4 As shown, in this embodiment, a breathing port 2 is fixedly installed on one side of the valve body 1, and the breathing port 2 is connected to the breathing chamber 101, and a mounting base 3 for mounting and connecting with the storage tank is fixedly connected to the bottom of the valve body 1, and a connecting pipe 4 is provided on the inner side of the mounting base 3, and the valve body 1 and the storage tank are connected through the connecting pipe 4, and a sealing cover 5 for sealing is fixedly connected on the top of the valve body 1, and the inner sides of the mounting base 3 and the sealing cover 5 are both embedded and connected with fixing bolts;

[0025] Specifically, through this arrangement, when in use, the valve body 1 is installed and used with the storage tank through the installation base 3, and is connected with the storage tank through the connecting pipe 4 for gas circulation. Secondly, the negative pressure plate 7 is installed and used by fixing the sealing cover 5 with the valve body 1. At the same time, the breathing port 2 is used to allow the negative pressure plate 7 to inhale the gas and the positive pressure plate 8 to exhale the gas.

[0026] like Figure 1-4 As shown, in this embodiment, one end of the telescopic rod 6 fixedly connected to the negative pressure plate 7 is fixedly connected to the sealing cover 5, the telescopic rod 6 fixedly connected to the positive pressure plate 8 is engaged with the positive pressure tube 9, one end of the telescopic rod 6 connected to the positive pressure plate 8 is engaged with the positive pressure tube 9, the breathing chamber 101 is fixedly installed on the inner side of the valve body 1, and there is a space for gas circulation between the breathing chamber 101 and the inner wall of the valve body 1;

[0027] Specifically, through this arrangement, the telescopic rod 6 is fixedly installed through the sealing cover 5 and the positive pressure tube 9. Since the telescopic rod 6 on the negative pressure plate 7 is a telescopic arrangement of two, one end thereof is fixedly connected to the negative pressure plate 7, and the other end is fixedly connected to the sealing cover 5, and a telescopic rod 6 is movably installed in the positive pressure tube 9, and then the telescopic rod 6 is used to improve the stability of the negative pressure plate 7 and the positive pressure plate 8 when opening and closing. When the negative pressure plate 7 and the positive pressure plate 8 are opened and closed, the breathing chamber 101 is connected with the breathing port 2 for exhalation and inhalation of gas, and secondly, the gas is circulated and used through the valve body 1 and the space in the breathing chamber 101.

[0028] It should be noted that when using the utility model as an acid-resistant, alkali-resistant and anti-corrosion breathing valve structure, firstly, the valve body 1 is installed and used with the storage tank through the installation base 3, and the gas is circulated through the connecting pipe 4 with the storage tank, and then the negative pressure plate 7 is installed and used by fixing the sealing cover 5 with the valve body 1. At the same time, the breathing port 2 is used to facilitate the negative pressure plate 7 to inhale the gas and the positive pressure plate 8 to exhale the gas, and the sealing cover 5 and the positive pressure pipe 9 are used to fix the telescopic rod 6, and The telescopic rod 6 is used to improve the stability of the negative pressure plate 7 and the positive pressure plate 8 when opening and closing. When the negative pressure plate 7 and the positive pressure plate 8 are opened and closed, the breathing chamber 101 and the breathing port 2 are connected to perform gas exhalation and inhalation. Secondly, the gas is circulated through the valve body 1 and the space in the breathing chamber 101. When the gas pressure inside the storage tank is too high, the gas in the storage tank is introduced into the space between the breathing chamber 101 and the valve body 1 through the connecting pipe 4. When the space between the valve body 1 and the breathing chamber 101 is filled with gas, the gas in the storage tank is The negative pressure plate 7 is always sealed with the breathing chamber 101 under the internal pressure, and the positive pressure plate 8 is lifted under the gas pressure, so that the gas in the valve body 1 and the breathing chamber 101 is exhaled from the positive pressure plate 8 through the positive pressure pipe 9. When the positive pressure plate 8 exhales the gas, a reflux valve 901 is provided in the positive pressure pipe 9. The reflux valve 901 is used to increase the flow rate when the gas is circulated, and the faster flow rate is used to improve the efficiency of gas discharge, while preventing part of the gas from being retained in the breathing chamber when the flow is slow. In the suction chamber 101, secondly, when the air pressure in the storage tank is close to the external air pressure and the positive pressure plate 8 falls, through the design of the reflux valve 901 (the working principle of this device is similar to that of the fluid passing through the Tesla valve), it can improve the situation where there is gas retained in the breathing chamber 101 or external gas flows into the breathing chamber 101 from the breathing port 2. When the positive pressure plate 8 falls and closes, the gas in the breathing chamber 101 is refluxed into the storage tank, thereby reducing the frequency of use of the positive pressure plate 8 and increasing the service life of the breathing valve structure.

[0029] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. The utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An acid-base-resistant and anti-corrosion breathing valve structure, comprising a valve body (1) and a breathing chamber (101), characterized in that: The breathing chamber (101) is fixedly arranged inside the valve body (1); a negative pressure plate (7) is fitted on the top of the breathing chamber (101); a positive pressure plate (8) is provided below the negative pressure plate (7), and the positive pressure plate (8) is fitted and connected to the breathing chamber (101); a positive pressure pipe (9) is provided below the positive pressure plate (8), and the positive pressure pipe (9) is fixedly connected to the breathing chamber (101); a return valve (901) is provided inside the positive pressure pipe (9), and the return valve (901) is connected to the valve body (1).

2. The acid-base-resistant and corrosion-resistant breathing valve structure according to claim 1 is characterized in that: A breathing port (2) is fixedly mounted on one side of the valve body (1), and the breathing port (2) is in continuous connection with the breathing chamber (101); a mounting base (3) for mounting and connecting with a storage tank is fixedly connected to the bottom of the valve body (1).

3. The acid-base-resistant and corrosion-resistant breathing valve structure according to claim 2 is characterized in that: A connecting pipe (4) is provided on the inner side of the mounting base (3), and the valve body (1) and the storage tank are connected through the connecting pipe (4). A sealing cover (5) for sealing is fixedly connected above the valve body (1), and fixing bolts are embedded and connected on the inner sides of the mounting base (3) and the sealing cover (5).

4. The acid-base-resistant and corrosion-resistant breathing valve structure according to claim 1 is characterized in that: A telescopic rod (6) is fixedly connected above the negative pressure plate (7) and below the positive pressure plate (8); one end of the telescopic rod (6) connected to the negative pressure plate (7) is fixedly connected to the sealing cover (5); and one end of the telescopic rod (6) connected to the positive pressure plate (8) is engaged with the positive pressure tube (9).

5. The acid-base-resistant and corrosion-resistant breathing valve structure according to claim 1 is characterized in that: The breathing chamber (101) is fixedly installed on the inner side of the valve body (1), and a space for gas circulation exists between the breathing chamber (101) and the inner wall of the valve body (1).

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