A pressure reducing valve

Abstract

The utility model discloses a pressure reducing valve, comprising a pressure reducing valve body, a mounting cavity is arranged in the pressure reducing valve body, a pressure reducing assembly is arranged in the mounting cavity, an air inlet pipe is arranged in the pressure reducing valve body, the air inlet pipe is communicated with the mounting cavity, a shock absorber is fixed to the air inlet pipe, the shock absorber comprises an integrally arranged fixing part and a guide part, the outer side of the fixing part is sealed with the inner wall of the air inlet pipe, a through hole communicated with the mounting cavity is provided in the fixing part, the through hole extends into the guide part, and an air guide hole communicated with the air guide hole is provided on the peripheral side of the guide part; the shock absorber can effectively reduce the impact force of the instantaneous high-pressure gas on the inside of the pressure reducing valve when the pressure reducing valve is connected with the high-pressure gas, thereby ensuring the reliability of the use of the pressure reducing valve; at the same time, the fixing part and the guide part integrally arranged in the shock absorber can effectively ensure the strength of the shock absorber, and avoid impact damage.

Description

Technical Field

[0001] The utility model specifically relates to a pressure reducing valve. Background Art

[0002] The pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through regulation, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. From the perspective of fluid mechanics, the pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of reducing pressure. Then, by relying on the regulation of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the spring force, so that the pressure behind the valve remains constant within a certain error range.

[0003] Gas pressure reducing valves are widely used in gas pipeline systems to reduce high-pressure gas to the required low pressure to meet the needs of the system. The main components of the gas pressure reducing valves currently manufactured in China are throttling components, load components, and unloading components. Existing pressure reducing valves are usually directly connected to high-pressure gas through pipelines, such as high-pressure cylinders, etc. However, in actual use, when the high-pressure gas is connected, the excessive pressure can easily cause a large impact on the original parts in the pressure reducing valve, causing shaking and friction, etc., resulting in a reduction in service life. In order to solve this problem, the utility model specifically proposes a new type of pressure reducing valve. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pressure reducing valve which has a simple structure and can effectively reduce the instantaneous impact of the pressure reducing valve being connected to high-pressure gas.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A pressure reducing valve comprises a pressure reducing valve body, wherein an installation cavity is arranged in the pressure reducing valve body, a pressure reducing assembly is arranged in the installation cavity, an air intake pipe is arranged in the pressure reducing valve body, the air intake pipe is communicated with the installation cavity, a shock absorber is fixed inside the air intake pipe, the shock absorber comprises an integrally arranged fixing part and a guide part, the outer side of the fixing part is sealed with the inner wall of the air intake pipe, the fixing part is provided with a through hole communicated with the installation cavity, the through hole extends into the guide part, and the peripheral side of the guide part is provided with an air guide hole communicated with the air guide hole.

[0007] Preferably, the fixing portion and the guiding portion are coaxially arranged, and the peripheral side wall of the guiding portion is close to the interior of the air intake pipe; the advantage is that the coaxially arranged fixing portion and the guiding portion can facilitate installation, and the distance between the guiding portion and the inner wall of the air intake pipe can be controlled. The close cooperation between the guiding portion and the inner wall of the air intake pipe can preliminarily reduce the airflow entering the air guide hole, and filter impurities to prevent large particles of impurities from entering the interior of the pressure reducing valve.

[0008] Furthermore, the through hole is coaxially arranged with the fixing part, and two air guide holes are arranged on the peripheral side of the guide part; the advantage is that the coaxially arranged through hole and the fixing part can easily control the strength of the fixing part, avoiding the uneven wall thickness of the through hole, and the two air guide holes can ensure the air intake and reliability, avoiding the blockage of a single air guide hole.

[0009] Furthermore, an air guide groove corresponding to the air guide hole is provided at the end of the guide portion close to the fixed portion, and the air guide hole is opened at the bottom of the corresponding air guide groove; the advantage is that the weight can be reduced and the cost can be reduced by setting the air guide groove, while ensuring the reliability of the airflow entering the air guide hole.

[0010] Furthermore, a conical diverter tip is provided at one end of the guide portion away from the fixed portion, and the diverter tip is coaxially arranged with the guide portion; the advantage is that the airflow can be differentiated by the arranged diverter tip, so that the airflow can smoothly enter the air guide hole along the gap between the guide portion and the intake pipe, thereby reducing the impact of the high-pressure gas on the shock absorber.

[0011] Preferably, the air intake pipe is detachably matched with the pressure reducing valve body, and the air intake pipe is provided with an air guide section and an air intake section which are interconnected. An air intake nozzle is provided at one end of the air intake pipe away from the pressure reducing valve body, and the shock absorber is fixedly arranged on the air guide section, and the air intake nozzle is connected with the air intake end. The advantage is that the detachable air intake pipe can be easily maintained and replaced, and the arranged air intake nozzle facilitates the connection of the pressure reducing valve to a high-pressure gas cylinder, etc.

[0012] Furthermore, a clamping nut is provided on the outer movable sleeve of the air inlet nozzle, and an anti-slip ring is provided on the end of the air inlet pipe close to the air inlet nozzle, and the anti-slip ring is located on the inner side of the clamping nut; the advantage is that the reliability of the connection between the air inlet pipe and the high-pressure gas cylinder can be guaranteed through the cooperation of the clamping nut and the anti-slip ring to avoid loosening.

[0013] Furthermore, the end of the air inlet nozzle is of an arc-shaped shape; the advantage is that the air inlet nozzle arranged in an arc-shaped shape can be easily connected to the tubular component and other high-pressure gas pipelines.

[0014] Furthermore, the air inlet nozzle is detachably provided with a plug, and the plug is used to seal the air inlet nozzle; the advantage is that the provided plug can reduce the entry of debris into the air inlet pipe during assembly and transportation, thereby improving reliability of use.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the shock absorber can effectively reduce the impact force of the high-pressure gas on the inside of the pressure reducing valve when the pressure reducing valve is connected to the high-pressure gas, thereby ensuring the reliability of the use of the pressure reducing valve; at the same time, the fixing part and the guide part integrally arranged in the shock absorber can effectively ensure the strength of the shock absorber and avoid impact damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the shock absorber of the utility model;

[0019] Figure 3 It is a front view schematic diagram of the shock absorber of the utility model;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the shock absorber of the utility model. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings. The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other implementation schemes, variations, improvements, equivalent solutions, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0022] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0023] As attached Figure 1-4The pressure reducing valve shown in the figure comprises a pressure reducing valve body 1, a mounting cavity 1.1 is arranged in the pressure reducing valve body 1, a pressure reducing assembly 2 is arranged in the mounting cavity 1.1, an air inlet pipe 3 is arranged in the pressure reducing valve body 1, the air inlet pipe 3 is connected with the mounting cavity 1.1, a shock absorber 4 is fixed to the inside of the air inlet pipe 3, the shock absorber 4 comprises an integrally arranged fixing part 4.1 and a guide part 4.2, the outer side of the fixing part 4.1 is sealed with the inner wall of the air inlet pipe 3, the fixing part 4.1 is provided with a through hole 4.3 connected with the mounting cavity 1.1, and the through hole 4.3 extends Into the guide part 4.2, the guide part 4.2 is provided with an air guide hole 4.4 connected to the air guide hole 4.4 on the periphery; when in use, that is, at the moment when the high-pressure gas is connected to the pressure reducing valve through the intake pipe, the high-pressure gas first impacts the shock absorber in the intake pipe, and the shock absorber 4 can effectively reduce the impact force of the high-pressure gas on the inside of the pressure reducing valve at the moment when the pressure reducing valve is connected to the high-pressure gas, thereby ensuring the reliability of the use of the pressure reducing valve, avoiding the shaking of the internal components of the pressure reducing valve due to the impact of the high-pressure gas, and then reducing the deviation and friction of the components, and improving the service life. At the same time, the fixed part 4.1 and the guide part 4.2 of the shock absorber 4 are integrally arranged to effectively ensure the strength of the shock absorber 4 and avoid impact damage.

[0024] On the basis of the above, in order to further reduce the impact force at the moment of connection and the reliability of use, the above-mentioned fixed part 4.1 is coaxially arranged with the guide part 4.2, and the peripheral side wall of the guide part 4.2 is close to the inside of the air intake pipe 3. The coaxially arranged fixed part 4.1 and guide part 4.2 can be easily installed, and the distance between the guide part 4.2 and the inner wall of the air intake pipe 3 can be controlled. The close cooperation between the guide part 4.2 and the inner wall of the air intake pipe 3 can initially reduce the airflow entering the air guide hole 4.4, and filter impurities to prevent large particles of impurities from entering the pressure reducing valve. In a preferred embodiment, the above-mentioned through hole 4.3 is coaxially arranged with the fixed part 4.1, and two air guide holes 4.4 are arranged on the peripheral side of the guide part 4.2. The coaxially arranged through hole 4.3 and the fixed part 4.1 can facilitate the control of the strength of the fixed part 4.1, avoid the uneven wall thickness of the through hole 4.3, and the two air guide holes 4.4 can ensure the air intake and reliability, and avoid the blockage of a single air guide hole 4.4. To further explain, an air guide groove 4.5 corresponding to the air guide hole 4.4 is provided at the end of the guide portion 4.2 close to the fixed portion 4.1. The air guide hole 4.4 is opened at the bottom of the corresponding air guide groove 4.5. The opened air guide groove 4.5 can reduce weight and cost while ensuring the reliability of airflow entering the air guide hole 4.4.

[0025] It is worth noting that a conical diversion tip 4.6 is provided at one end of the guide portion 4.2 away from the fixed portion 4.1. The diversion tip 4.6 is coaxially arranged with the guide portion 4.2. The diversion tip 4.6 can differentiate the airflow so that the airflow smoothly enters the air guide hole 4.4 along the gap between the guide portion 4.2 and the air intake pipe 3, thereby reducing the impact of the high-pressure gas on the shock absorber 4.

[0026] The air intake pipe 3 of the utility model is fixed to the pressure reducing valve body 1 in a detachable matching manner. An air guide section 3.1 and an air intake section 3.2 are arranged inside the air intake pipe 3. An air intake nozzle 3.3 is arranged at one end of the air intake pipe 3 away from the pressure reducing valve body. The shock absorber 4 is fixedly arranged at the air guide section 3.1. The air intake nozzle 3.3 is connected to the air intake end. The detachable air intake pipe 3 is convenient for maintenance and replacement. The air intake nozzle 3.3 is convenient for the pressure reducing valve to connect to a high-pressure gas cylinder, etc. For further explanation, a clamping nut 5 is arranged on the outer sleeve of the air intake nozzle 3.3. An anti-slip ring 3.4 is arranged at the end of the air intake pipe 3 close to the air intake nozzle 3.3. The anti-slip ring 3.4 is located on the inner side of the clamping nut 5. The combination of the clamping nut 5 and the anti-slip ring 3.4 can ensure the reliability of the air intake pipe 3 connecting to the high-pressure gas cylinder and avoid loosening.

[0027] It is worth mentioning that the end of the air inlet nozzle 3.3 is an arc-shaped one, which can be easily connected to tubular components and other high-pressure gas pipelines. The air inlet nozzle 3.3 of the utility model is detachably provided with a plug 6, which is used to seal the air inlet nozzle 3.3. The plug can reduce the entry of debris into the air inlet pipe during assembly and transportation, thereby improving the reliability of use.

[0028] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A pressure reducing valve, comprising a pressure reducing valve body, wherein a mounting cavity is provided in the pressure reducing valve body, and a pressure reducing assembly is provided in the mounting cavity, wherein: The pressure reducing valve body is provided with an air intake pipe, the air intake pipe is connected with the installation cavity, a shock absorber is fixed inside the air intake pipe, the shock absorber includes an integrally arranged fixing part and a guide part, the outer side of the fixing part is sealed with the inner wall of the air intake pipe, the fixing part is provided with a through hole connected with the installation cavity, the through hole extends into the guide part, and the guide part is provided with an air guide hole connected with the air guide hole on its peripheral side.

2. A pressure reducing valve according to claim 1, characterized in that: The fixing portion is coaxially arranged with the guide portion, and the peripheral side wall of the guide portion is close to the interior of the air intake pipe.

3. A pressure reducing valve according to claim 2, characterized in that: The through hole is coaxially arranged with the fixing portion, and two air guide holes are arranged on the peripheral side of the guide portion.

4. A pressure reducing valve according to claim 3, characterized in that: An air guide groove corresponding to the air guide hole is arranged at the end of the guide portion close to the fixing portion, and the air guide hole is opened at the bottom of the corresponding air guide groove.

5. A pressure reducing valve according to claim 2, characterized in that: A conical flow-dividing tip is arranged at one end of the guide portion away from the fixing portion, and the flow-dividing tip is arranged coaxially with the guide portion.

6. A pressure reducing valve according to claim 1, characterized in that: The air intake pipe is detachably matched with the pressure reducing valve body, and an air guide section and an air intake section which are interconnected are arranged inside the air intake pipe. An air intake nozzle is arranged at one end of the air intake pipe away from the pressure reducing valve body, and the shock absorber is fixedly arranged on the air guide section, and the air intake nozzle is connected to the air intake end of the air intake pipe.

7. A pressure reducing valve according to claim 6, characterized in that: The movable sleeve outside the air inlet nozzle is provided with a clamping nut, and the end of the air inlet pipe close to the air inlet nozzle is provided with an anti-slip ring, and the anti-slip ring is located inside the clamping nut.

8. A pressure reducing valve according to claim 6, characterized in that: The end of the air inlet nozzle is a curved surface.

9. A pressure reducing valve according to claim 6, characterized in that: The air inlet nozzle is detachably provided with a plug, and the plug is used to seal the air inlet nozzle.

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