Integrated pressure regulating valve

Abstract

The utility model discloses an integrated pressure regulating valve which comprises a valve body and a valve element assembly. The valve body is of a T-shaped structure, a cavity is formed in the middle of the valve body, a circle of arc-shaped step is arranged in the middle of the cavity, the arc-shaped step and the valve body are integrally formed, and a ventilation window is formed in the top of the valve body. The valve element assembly comprises a valve rod, an element body, a rubber sealing washer, a positive pressure spring, a positive pressure spring cover, a negative pressure spring and a negative pressure spring cover. According to the design, the valve bonnet and the valve body are combined, the integrated design is adopted, and the risk that the valve bonnet is loosened and falls off outside is eradicated. In addition, the structure of the inner wall of the valve body is improved, and an arc-shaped step is designed, so that the contact area between the rubber sealing washer and the inner wall of the valve body is larger, the influence of foreign matter and external air pressure change is smaller, and the sealing effect and the pressure adjusting effect are more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust valve technical field especially is related to an integrated pressure regulating valve. BACKGROUND

[0002] The existing integrated inlet and exhaust valve is used in ordinary environment, the internal spring force is calculated according to the use requirement, and the valve element is pushed by air pressure to overcome the force set by the spring to realize opening, and the valve element is pushed by the spring force to complete closing when the pressure drops below the spring force, and the principle is the same in the opposite direction, and the valve stem on the valve element body completes the opening and closing action.

[0003] The existing integrated inlet and exhaust valve can only rely on the spring force to realize the opening and closing of the valve at normal temperature and pressure, and once the special environment (such as polar region, high altitude area and other atmospheric pressure abnormal environment) is encountered, the accurate control cannot be completed according to the requirement, and for the use of the integrated inlet and exhaust valve in the above special environment, an improved inlet and exhaust valve is specially designed to meet the requirement for precise control and use requirement. The existing patent CN202220792635. X is a kind of automatic inlet and exhaust valve, by increasing the first adjusting screw, provide the friction between the valve rod to supplement the spring force. However, as a kind of continuous force, it can supplement the spring force and limit the spring force, such as when the positive pressure exhausts, the friction triggers the exhaust when the internal pressure reaches a certain value as the supplement of the spring force, and the friction becomes the limitation of the spring force after the exhaust is completed, offsets a part of spring force, and is easy to cause the valve to close tightly, causing air leakage. Conversely, when negative pressure is inhaled, the same danger will occur. Therefore, the present design provides another design idea, which can reduce the influence of external environmental factors on the breathing valve without affecting the normal use of the breathing valve. SUMMARY

[0004] The utility model wants to solve the problem, according to the above-mentioned shortcomings in the prior art, an improved scheme or replacement scheme is proposed, especially an improved or replacement scheme that improves safety performance and greatly reduces the influence of external factors.

[0005] In order to solve the above problems, the utility model adopts the scheme as follows: a kind of integrated pressure regulating valve, it is characterized in that, including valve body and valve core assembly;The valve body is T-shaped structure, and the middle part is equipped with cavity, and a circle arc step is equipped in the middle part of cavity, and the arc step is integrally formed with valve body, and the top of valve body is opened with air window;The valve core assembly includes valve rod, core body, rubber sealing washer, positive pressure spring, positive pressure spring cover, negative pressure spring, negative pressure spring cover;The core body is hollow design, and it is arranged in cavity, and the outer diameter of core body is less than the inner diameter of cavity, and the central part of core body is equipped with through-hole matched with valve rod;The valve rod is arranged in cavity by passing through the through-hole of core body, and the middle part of valve rod is equipped with a half-sphere step;The rubber sealing washer is arranged on core body, and located between core body and half-sphere step;The positive pressure spring is sleeved on valve rod, and is positioned by positive pressure spring cover, and the positive pressure spring cover is connected with valve rod by thread;The negative pressure spring is sleeved on the outside of positive pressure spring, and is positioned by negative pressure spring cover, and the negative pressure spring cover is connected with the inner wall of valve body by thread.

[0006] Further, the integrated pressure regulating valve is characterized in that the air window is composed of a plurality of air holes. The air holes are uniformly arranged, which not only provides an air passage, but also plays the role of a mosquito net.

[0007] Further, the integrated pressure regulating valve is characterized in that the top of the valve body extends outward to form a brim, a groove and a sealing ring are arranged below the brim, threads are arranged on the outer wall of the valve body, and a mounting nut is connected by threads, and the pressure regulating valve is sealed and installed by the mounting nut.

[0008] Further, the integrated pressure regulating valve is characterized in that an annular mounting groove is arranged on the upper surface of the core body, and the rubber sealing washer is fixedly arranged in the mounting groove.

[0009] Further, the integrated pressure regulating valve is characterized in that the thickness of the rubber sealing washer is greater than the thickness of the inner arc step of the valve body.

[0010] Further, the integrated pressure regulating valve is characterized in that the curvature of the arc step is equal to the thickness of the rubber sealing washer divided by the inner diameter of the valve body.

[0011] Further, the integrated pressure regulating valve is characterized in that the brim of the valve body and the mounting nut are provided with fuse reservation holes, which are used to set fuses after the pressure regulating valve is installed.

[0012] The technical effects of the utility model are as follows: the valve cap is combined with the valve body, an integral design is adopted, and the risk of loosening and falling of the valve cap is eliminated.

[0013] Compared with plane contact or inclined plane contact, the arc-shaped step and the hemispherical step can provide larger contact area and sealing pressure. When the valve is closed, the upper and lower surfaces of the rubber sealing gasket are in contact with the arc-shaped step and the hemispherical step of the valve core respectively, specifically, the upper surface of the rubber sealing gasket is in contact with the arc-shaped step, and the rubber sealing gasket is deformed under the action of the spring force. Therefore, the sealing is not a change of a pressure point, but a change of a pressure stroke, when the pressure reaches a critical point, due to the arc-shaped contact surface, a high sealing performance can still be maintained to offset the influence of external environmental factors on the pressure regulating valve. The thickness and hardness (deformation performance) of the rubber sealing gasket, the positive pressure spring cover and the negative pressure spring cover are adjusted to adjust the set pressure of the pressure regulating valve. The thickness and hardness (deformation performance) of the rubber sealing gasket, and the curvature of the arc-shaped step and the hemispherical step are adjusted to adjust the range of the pressure regulating valve to respond to external pressure changes.

[0014] The fuse reservation hole is arranged at the brim of the valve body and the mounting nut, and the fuse is arranged after the installation of the pressure regulating valve, so that the pressure regulating valve can alarm when loosening occurs, and the safety performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a sectional structure diagram of the pressure regulating valve.

[0016] Fig. 2 It is a schematic view of the valve body.

[0017] Fig. 3 It is a schematic view of the valve core assembly.

[0018] Fig. 4 It is a schematic view of the valve rod.

[0019] Fig. 5 It is a schematic view of the core body.

[0020] Fig. 6 It is a schematic view of the arc-shaped step.

[0021] Wherein, 1 is valve body, 2 is valve stem, 3 is rubber sealing washer, 4 is core body, 5 is positive spring, 6 is negative pressure spring, 7 is mounting nut, 8 is sealing ring, 11 is air window, 12 is arc step, 13 is fuse reserved hole, 21 is hemispherical step, 41 is installation groove, 51 is positive spring cover, 61 is negative pressure spring cover. DETAILED DESCRIPTION

[0022] The utility model will be made further detailed explanation in combination with the drawings.

[0023] Embodiment: as Figs. 1-6 The utility model discloses a one-piece pressure regulating valve, including valve body and valve core subassembly, the valve body presents T type structure, and the middle part is equipped with cavity, and the middle part of cavity is equipped with a circle arc step, and the arc step is integrally formed with valve body, the valve body top is opened and has air window, the valve core subassembly includes valve stem, core body, rubber sealing washer, positive spring, positive spring cover, negative pressure spring, negative pressure spring cover, the core body is hollow design, and it sets up in the cavity, and the core body outer diameter is less than the inner diameter of cavity, and the core body central part is equipped with the through -hole matched with valve stem, the valve stem passes through the through -hole of core body and sets up in the cavity, and the valve stem middle part is equipped with a hemispherical step, the rubber sealing washer sets up on the core body and is located between the core body and hemispherical step, the positive spring is covered in the valve stem, and is limited through positive spring cover, and the positive spring cover is connected through the screw with valve stem, the negative pressure spring is covered in the outside of positive spring, and is limited through negative pressure spring cover, and the negative pressure spring cover is connected through the screw with the inner wall of valve body.

[0024] The air window of the embodiment is composed of a plurality of air holes. The air holes are uniformly arranged, which can not only provide an air passage, but also play the role of a mosquito net. The valve body extends outward at the top to form a brim, a groove and a sealing ring are arranged below the brim, threads are arranged on the outer wall of the valve body, and a mounting nut is connected through the threads, so that the pressure regulating valve is sealed and installed through the mounting nut. An annular installation groove is arranged on the upper surface of the core body, and the rubber sealing washer is fixedly arranged in the installation groove. A positive spring installation groove and a negative pressure spring installation groove are arranged on the lower surface of the core body, which are used for installing the positive spring and the negative pressure spring respectively, so as to prevent the positive spring and the negative pressure spring from shaking in the valve body. The curvature of the curved surface of the arc step is equal to the thickness of the rubber sealing washer / the inner diameter of the valve body. Fuse reserved holes are arranged on the brim of the valve body and the mounting nut, and a fuse is arranged after the pressure regulating valve is installed.

Claims

1. An integrated pressure regulating valve characterized by, The utility model provides a pressure regulating valve, including valve body and valve core assembly, the valve body is T type structure, is equipped with cavity in the middle, and is equipped with a circle arc step in the middle part of cavity, and the arc step is integrally formed with the valve body, the valve body top is opened and has a gas permeation window, the valve core assembly includes valve rod, core body, rubber sealing washer, positive pressure spring, positive pressure spring cover, negative pressure spring, negative pressure spring cover, the core body is hollow design, and is arranged in the cavity, and the core body outer diameter is less than the cavity inner diameter, and the core body central part is equipped with the through -hole matched with valve rod, the valve rod passes through the through -hole of core body and is arranged in the cavity, and the valve rod middle part is equipped with a half spherical step, the rubber sealing washer is arranged on the core body and is located between the core body and half spherical step, the positive pressure spring is sleeved on the valve rod, and is limited through the positive pressure spring cover, and the positive pressure spring cover is connected through the screw with the valve rod, the negative pressure spring is sleeved on the outside of positive pressure spring, and is limited through the negative pressure spring cover, and the negative pressure spring cover is connected through the screw with the valve body inner wall.

2. The integrated pressure regulating valve of claim 1, wherein, The gas permeation window is composed of a plurality of gas permeation holes.

3. The integrated pressure regulating valve of claim 1, wherein, The valve body top extends outward to form a brim, a groove and a sealing ring are arranged below the brim, a screw thread is arranged on the outer wall of the valve body, and a mounting nut is connected through the screw thread, and the pressure regulating valve is sealed and mounted through the mounting nut.

4. The integrated pressure regulating valve of claim 1, wherein, An annular mounting groove is arranged on the upper surface of the core body, and the rubber sealing washer is fixedly arranged in the mounting groove.

5. The integrated pressure regulating valve of claim 1, wherein, The thickness of the rubber sealing washer is greater than the thickness of the inner arc step of the valve body.

6. The integrated pressure regulating valve of claim 1, wherein, The curvature of the arc step is equal to the thickness of the rubber sealing washer divided by the inner diameter of the valve body.

7. The integrated pressure regulating valve of claim 3, wherein, Fuse reservation holes are arranged on the brim and the mounting nut of the valve body, and are used for arranging a fuse after the pressure regulating valve is mounted.

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