CN220037554U - Adjustable negative pressure relief valve - Google Patents

Abstract

The utility model provides an adjustable negative pressure relief valve, which comprises a valve body, wherein the bottom of the valve body is connected with a negative pressure air pipe, an air inlet is formed in the valve body, a partition plate and a spring tension meter are arranged in an inner cavity of the valve body, the partition plate is positioned between the air inlet and the negative pressure air pipe, a pressure relief through hole is formed in the partition plate, a valve plate is hinged to the side surface of the partition plate, which is away from the air inlet, the valve plate is used for sealing the pressure relief through hole, the stretching end of the spring tension meter is connected with the valve plate, a dial plate of the spring tension meter is connected with the top of the valve body through an adjusting part, the adjusting part is used for adjusting the distance between the dial plate and the valve plate, and the position of the air inlet corresponds to the position of the dial plate. According to the pressure relief valve, the pressure relief pressure preset value can be accurately adjusted, and the safety of the pressure relief valve is improved.

Description

Adjustable negative pressure relief valve

Technical Field

The utility model relates to the technical field of pressure relief valves, in particular to an adjustable negative pressure relief valve.

Background

The pressure relief valve is also called a safety valve, can be automatically opened and closed according to the working pressure of the system, and is generally arranged on equipment or a pipeline of a closed system to protect the safety of the system. When the pressure in the equipment or the pipeline exceeds the set pressure of the pressure relief valve, the pressure relief valve is automatically opened, so that the medium pressure in the equipment and the pipeline is ensured to be under the set pressure, the equipment and the pipeline are protected, and accidents are prevented. At present, when the preset value of the pressure relief pressure is adjusted, a screw is generally screwed to change the tension force of a spring in the valve, and the spring is positioned in the valve, so that the adjustment is uncontrollable, the precision of the preset value of the pressure relief pressure is low, and the safety of the pressure relief valve is reduced.

Disclosure of Invention

The utility model mainly aims to provide an adjustable negative pressure relief valve, which comprises but is not limited to solving the technical problems that the accuracy of adjusting the preset value of the relief pressure is low and the safety of the relief valve is reduced in the prior art.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an adjustable negative pressure relief valve, includes the valve body, the bottom and the negative pressure tuber pipe of valve body are connected, the air intake has been seted up on the valve body, the inner chamber of valve body is equipped with baffle and spring tension meter, the baffle is located between air intake and the negative pressure tuber pipe, the pressure release through-hole has been seted up on the baffle, the baffle deviates from the valve plate on the side of air intake, the valve plate is used for shutoff the pressure release through-hole, the tensile end and the valve plate of spring tension meter are connected, the dial plate of spring tension meter is connected with the top of valve body through adjusting part, adjusting part is used for adjusting the distance of dial plate and valve plate, the position of air intake corresponds with the position of dial plate.

The beneficial effects of the utility model are as follows: the distance between the dial plate and the valve plate is regulated by the regulating part, the pulling force of the spring pulling force meter to the valve plate can be accurately measured through the dial plate on the spring pulling force meter, the preset value for regulating the pressure relief pressure is controllable, the accuracy of control is enhanced, the use safety of the pressure relief valve is improved, meanwhile, the position of the air inlet corresponds to the position of the dial plate, the dial plate is conveniently and rapidly read through the air inlet, and the device is convenient to use.

Preferably, the adjusting part comprises a screw rod, one end of the screw rod is connected with the dial plate, the other end of the screw rod penetrates through the valve wall of the valve body and stretches out of the valve body, two nuts are screwed on the screw rod, and the two nuts are locked and then are abutted to the valve wall of the valve body. The length of the screw rod extending out of the valve body is changed through different positions of the two nuts on the screw rod, so that the distance between the dial plate and the valve plate is adjusted, and the valve is simple in structure and convenient to adjust.

Preferably, the screw rod is provided with scales. By adopting the structure, the length of the screw rod extending out of the valve body is further accurately controlled, and the regulation and control precision of the pressure relief valve is improved.

Preferably, the stretching end of the spring tension meter passes through the pressure relief through hole and then is hinged to the valve plate, and the dial plate of the spring tension meter is hinged to the end part of the screw rod. Through adopting above-mentioned structure, the atress direction that makes the stretching end is unanimous with the length direction of dial plate, and the stretching end can pull out smoothly from the dial plate, improves the measurement accuracy of spring tension meter.

Preferably, a sealing ring is arranged between the valve plate and the partition plate, and an annular groove for embedding the sealing ring is arranged on the partition plate. Through adopting above-mentioned structure, improve the leakproofness of valve plate shutoff pressure release through-hole.

Preferably, the valve body comprises a valve cover and a pipe body, the valve cover is detachably connected with the upper end of the pipe body, the lower end of the pipe body is detachably connected with the negative pressure air pipe, and the air inlet is formed in the side wall of the pipe body. Through adopting above-mentioned structure, make things convenient for the dismouting of valve body.

Preferably, the valve body comprises a valve cover, an upper pipe body and a lower pipe body, the valve cover is detachably connected with the upper end of the upper pipe body, the lower end of the upper pipe body is detachably connected with the upper end of the lower pipe body, the lower end of the lower pipe body is detachably connected with a negative pressure air pipe, the air inlet is formed in the side wall of the upper pipe body, and the partition plate is located between the upper pipe body and the lower pipe body. Through adopting above-mentioned structure, make things convenient for the dismouting of valve body, but simultaneously the replacement not unidimensional lower body matches different negative pressure tuber pipes, does benefit to the multiple ring of valve body to use, improves the practicality.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of a first embodiment of the utility model;

FIG. 3 is a schematic diagram of a second embodiment of the present utility model;

FIG. 4 is a second schematic structural diagram of a second embodiment of the present utility model;

reference numerals illustrate:

1. negative pressure air pipe; 2. a valve body; 21. a valve cover; 22. a tube body; 23. an upper tube body; 24. a lower pipe body; 3. an air inlet; 4. a partition plate; 41. a pressure relief through hole; 5. a spring tension meter; 51. a dial; 52. stretching ends; 6. a valve plate; 7. an adjusting section; 71. a screw rod; 72. a nut; 8. and (3) sealing rings.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

As shown in fig. 1 and 2, an adjustable negative pressure relief valve is provided, which comprises a valve body 2, the valve body 2 includes valve gap 21 and body 22, the valve gap 21 can be dismantled and be connected body 22 upper end, body 22 lower extreme can be dismantled and be connected on negative pressure tuber pipe 1, air intake 3 has been seted up on the lateral wall of body 22, the inner chamber of valve body 2 is equipped with baffle 4 and spring tension gauge 5, baffle 4 is located between air intake 3 and negative pressure tuber pipe 1, the pressure relief through-hole 41 has been seted up on the baffle 4, the baffle 4 has articulated valve plate 6 on the side that deviates from air intake 3, valve plate 6 is used for shutoff pressure relief through-hole 41, the tensile end 52 of spring tension gauge 5 is connected with valve plate 6, the dial 51 of spring tension gauge 5 is connected with the valve gap 21 of valve body 2 through adjusting part 7, adjusting part 7 is used for adjusting the distance of dial 51 and valve plate 6, the position of air intake 3 corresponds with the position of dial 51.

In this embodiment, the adjusting portion 7 includes a screw rod 71, one end of the screw rod 71 is connected with the dial 51, the other end of the screw rod 71 passes through the valve cover 21 of the valve body 2 and extends out of the valve body 2, two nuts 72 are screwed on the screw rod 71, and the two nuts 72 are locked and then abut against the valve cover 21 of the valve body 2, so that the different positions of the two nuts 72 on the screw rod 71 change the length of the screw rod 71 extending out of the valve body 2, thereby realizing the adjustment of the distance between the dial 51 and the valve plate 6, and the device has a simple structure and convenient adjustment.

In this embodiment, the screw rod 71 is provided with scales extending along the length direction of the screw rod 71, so that the length of the screw rod 71 extending out of the valve body 2 is further accurately controlled, and the regulation precision of the pressure relief valve is improved.

In this embodiment, the stretching end 52 of the spring tension meter 5 is hinged on the valve plate 6 after passing through the pressure relief through hole 41, and the dial plate 51 of the spring tension meter 5 is hinged at the lower end of the screw rod 71, so that the stress direction of the stretching end 52 is consistent with the length direction of the dial plate 51, and the stretching end 52 can be smoothly pulled out from the dial plate 51, thereby improving the measurement accuracy of the spring tension meter 5.

In this embodiment, a sealing ring 8 is disposed between the valve plate 6 and the partition plate 4, and an annular groove into which the sealing ring 8 is embedded is disposed on the partition plate 4, so that the tightness of the valve plate 6 for blocking the pressure relief through hole 41 is improved.

Example two

As shown in fig. 3 and fig. 4, the difference between this embodiment and the first embodiment is that the valve body 2 includes a valve cover 21, an upper pipe body 23 and a lower pipe body 24, the valve cover 21 is detachably connected to the upper end of the upper pipe body 23, the lower end of the upper pipe body 23 is detachably connected to the upper end of the lower pipe body 24, the lower end of the lower pipe body 24 is detachably connected to the negative pressure air pipe 1, the air inlet 3 is opened on the side wall of the upper pipe body 23, the partition board 4 is located between the upper pipe body 23 and the lower pipe body 24, and when in use, the lower pipe body 24 with different sizes can be replaced to match different negative pressure air pipes 1, which is beneficial to the multiple environment use of the valve body 2 and improves the practicability.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims (7)

1. The utility model provides an adjustable negative pressure relief valve, includes valve body (2), its characterized in that, the bottom and the negative pressure tuber pipe (1) of valve body (2) are connected, air intake (3) have been seted up on valve body (2), the inner chamber of valve body (2) is equipped with baffle (4) and spring tension meter (5), baffle (4) are located between air intake (3) and negative pressure tuber pipe (1), pressure release through-hole (41) have been seted up on baffle (4), it has valve plate (6) to articulate on the side that baffle (4) deviate from air intake (3), valve plate (6) are used for shutoff pressure release through-hole (41), tensile end (52) and valve plate (6) of spring tension meter (5) are connected, dial plate (51) of spring tension meter (5) are connected through the top of adjusting part (7) and valve body (2), adjusting part (7) are used for adjusting the distance of dial plate (51) and valve plate (6), the position of air intake (3) corresponds with the position of dial plate (51).

2. The negative pressure adjustable relief valve according to claim 1, characterized in that the adjusting part (7) comprises a screw rod (71), one end of the screw rod (71) is connected with the dial plate (51), the other end of the screw rod (71) penetrates through the valve wall of the valve body (2) and extends out of the valve body (2), two nuts (72) are screwed on the screw rod (71), and the two nuts (72) are abutted against the valve wall of the valve body (2) after being locked.

3. An adjustable negative pressure relief valve according to claim 2, characterized in that the screw (71) is provided with graduations.

4. An adjustable negative pressure relief valve according to claim 2, characterized in that the stretching end (52) of the spring tension meter (5) is hinged on the valve plate (6) after passing through the relief through hole (41), and the dial plate (51) of the spring tension meter (5) is hinged at the end of the screw rod (71).

5. The pressure relief valve according to claim 1, characterized in that a sealing ring (8) is arranged between the valve plate (6) and the partition plate (4), and a ring groove for embedding the sealing ring (8) is arranged on the partition plate (4).

6. The adjustable negative pressure relief valve according to claim 1, wherein the valve body (2) comprises a valve cover (21) and a pipe body (22), the valve cover (21) is detachably connected to the upper end of the pipe body (22), the lower end of the pipe body (22) is detachably connected with the negative pressure air pipe (1), and the air inlet (3) is formed in the side wall of the pipe body (22).

7. The adjustable negative pressure relief valve according to claim 1, characterized in that the valve body (2) comprises a valve cover (21), an upper pipe body (23) and a lower pipe body (24), the valve cover (21) is detachably connected with the upper end of the upper pipe body (23), the lower end of the upper pipe body (23) is detachably connected with the upper end of the lower pipe body (24), the lower end of the lower pipe body (24) is detachably connected with the negative pressure air pipe (1), the air inlet (3) is formed in the side wall of the upper pipe body (23), and the partition plate (4) is positioned between the upper pipe body (23) and the lower pipe body (24).