Pressure regulating assembly and pneumatic system

Abstract

The embodiment of the utility model relates to the technical field of pressure regulating valves, in particular to a pressure regulating assembly and a pneumatic system.The pressure regulating assembly comprises a main pipe, the main pipe comprises a contraction part, a straight pipe body and an expansion part which are sequentially communicated, and the inner diameter of the contraction part is gradually reduced in the direction from one end, away from the straight pipe body, of the contraction part to the other end, close to the straight pipe body, of the contraction part; the inner diameter of the expansion part is gradually increased from one end, close to the straight pipe body, of the expansion part to the other end, away from the straight pipe body, of the expansion part; a pressure adjusting opening is formed in the side wall of the expansion part. Through the mode, the number of parts can be reduced, so that the manufacturing cost is reduced, and the assembly process is simplified.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of pressure regulating valves, and in particular to a pressure regulating component and a pneumatic system. Background Art

[0002] In the fluid supply system, a pressure regulating valve is usually used so that when the pressure of the flowing fluid exceeds a certain threshold, it can be discharged from the pressure regulating valve to prevent the system from being over-pressurized and affecting the normal operation of the system. Most of the existing pressure regulating valves include a tube body, a movable iron core, a spring, a top cover and a silencer. The tube body is arranged in the main airway and is connected to the main airway through the pressure reducing port. The movable iron core and the spring are both located in the tube body. The spring abuts against the movable iron core so that the movable iron core blocks the pressure reducing port. The top cover is used to limit the spring from being away from one end of the movable iron core. The silencer is arranged on the top cover. When the pressure of the main airway exceeds the threshold, the air pressure forces the movable iron core to push the spring to open the pressure reducing port to achieve the pressure relief function; when the pressure of the main airway is lower than the threshold, the spring pushes the movable iron core back to re-block the pressure reducing port.

[0003] However, this conventional pressure regulating valve has many parts, which results in high manufacturing cost and complicated assembly process. Utility Model Content

[0004] In view of the above problems, the embodiments of the present utility model provide a pressure regulating assembly and a pneumatic system, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of an embodiment of the utility model, a pressure regulating assembly is provided, including a main pipe, the main pipe including a contraction portion, a straight tube body and an expansion portion which are connected in sequence, wherein the inner diameter of the contraction portion gradually decreases along a direction from one end of the contraction portion away from the straight tube body to the other end of the straight tube body; the inner diameter of the expansion portion gradually increases along a direction from one end of the expansion portion close to the straight tube body to the other end of the straight tube body; and a pressure regulating port is provided on a side wall of the expansion portion.

[0006] In some embodiments, the pressure regulating assembly further includes a pressure regulating tube connected to the pressure regulating port.

[0007] In some embodiments, the inner diameter of the pressure regulating tube gradually increases along a direction from one end of the pressure regulating tube close to the pressure regulating port to the other end away from the pressure regulating port.

[0008] In some embodiments, the pressure regulating assembly further includes a silencer disposed inside the pressure regulating tube.

[0009] In some embodiments, the ratio of the inner diameter of the pressure regulating port to the inner diameter of the straight tube body is 0.4 to 0.7.

[0010] In some embodiments, a ratio of an inner diameter of the straight tube body to a maximum inner diameter of the contraction portion is 0.35 to 0.5.

[0011] In some embodiments, the pressure regulating assembly satisfies: 0.3≤L1 / L2≤3; L1 is the distance between the pressure regulating port and an end of the expansion portion close to the straight tube body, and L2 is the distance between the pressure regulating port and an end of the expansion portion away from the straight tube body.

[0012] According to one aspect of an embodiment of the utility model, a pneumatic system is provided, including an air source, a control valve group and an air-using unit, the air source is connected to the control valve group via a first air supply pipeline, the control valve group is connected to the air-using unit via a second air supply pipeline, and the above-mentioned pressure regulating assembly is provided on the first air supply pipeline.

[0013] The beneficial effect of the embodiment of the utility model is as follows: Different from the prior art, the embodiment of the utility model provides a pressure regulating assembly, including a main pipe, the main pipe including a contraction part, a straight pipe body and an expansion part connected in sequence, and a pressure regulating port is provided on the side wall of the expansion part. In this way, when the pressure regulating assembly is arranged on the main air intake pipeline between the gas source and the valve group, the gas will flow from the contraction part through the main pipe and then to the expansion part. After the gas is accelerated through the contraction part and enters the straight pipe body, the flow rate of the fluid becomes faster and the pressure becomes lower. Therefore, the flow rate of the gas to the pressure regulating port is still relatively fast, and a negative pressure will be formed at the pressure regulating port to produce a Venturi effect, attracting external air to flow into the main pipe through the pressure regulating port, thereby accelerating the inflation speed; when the air bag or other gas container is inflated to a certain extent, the gas flow rate decreases, and the pressure in the entire air intake channel increases. When the pressure reaches a certain threshold, the gas in the pressure regulating assembly can be discharged to the outside through the pressure regulating port, so that the pressure regulating assembly can also achieve the function of pressure relief. Compared with the existing pressure regulating valve, the pressure regulating assembly of the utility model can not only speed up the inflation speed during inflation, but also relieve pressure when the pressure exceeds a certain threshold. It has fewer parts and a simple structure, which makes its manufacturing cost lower and the assembly process simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0015] Figure 1 It is a three-dimensional diagram of a voltage regulating assembly provided by an embodiment of the utility model;

[0016] Figure 2is a cross-sectional view of a voltage regulating assembly provided in an embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure after the straight tube body and the expansion part are connected according to an embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the pressure regulating assembly provided by the embodiment of the utility model when air is taken in through the pressure regulating port;

[0019] Figure 5 It is a schematic diagram of the pressure regulating assembly provided in an embodiment of the utility model when exhausting and relieving pressure through the pressure regulating port.

[0020] The reference numerals in the specific implementation manner are as follows:

[0021] 100. Pressure regulating assembly; 10. Main pipe; 11. Contraction portion; 12. Straight pipe body; 13. Expansion portion; 131. Pressure regulating port; 20. Pressure regulating pipe; 30. Silencer. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0024] The pressure regulating assembly of the utility model embodiment is connected to form a main pipe through a contraction part, a straight tube body and an expansion part. The side wall of the expansion part is provided with a pressure regulating port. When applied to the gas supply system, the gas is allowed to flow from the contraction part to the expansion part. According to the Venturi effect, when the gas passes through a narrow pipe, the flow rate becomes faster and the pressure becomes lower. Therefore, when the gas flows to the pressure regulating port, a negative pressure is formed, which attracts external air to flow into the main pipe through the pressure regulating port, thereby accelerating the inflation speed; when the gas is inflated to a certain degree, the gas flow rate decreases and the pressure in the main pipe increases. At this time, the gas in the main pipe can be discharged to the outside through the pressure regulating port, thereby achieving pressure relief.

[0025] In order to facilitate readers to understand the inventive concept of the utility model, the specific structure of the voltage regulating assembly is described below:

[0026] See also Figure 1-2 The pressure regulating assembly 100 includes a main pipe 10, which includes a contraction portion 11, a straight pipe body 12 and an expansion portion 13 that are connected in sequence, wherein the inner diameter of the contraction portion 11 gradually decreases along a direction from one end of the contraction portion 11 away from the straight pipe body 12 to the other end of the straight pipe body 12; the inner diameter of the expansion portion 13 gradually increases along a direction from one end of the expansion portion 13 close to the straight pipe body 12 to the other end of the straight pipe body 12; a pressure regulating port 131 is opened on the side wall of the expansion portion 13. In this way, when the pressure regulating assembly 100 is arranged on the main air intake pipeline between the air source and the valve group, the valve group is connected to the air-using unit through each branch pipeline. The air-using unit can be an air bag or other container that receives and stores gas. The gas will flow from the contraction part 11 through the main pipe 10 and then flow to the expansion part 13. After the gas is accelerated through the contraction part 11 and enters the straight pipe body 12, the flow rate of the gas becomes faster and the pressure becomes lower. Therefore, the flow rate of the gas to the pressure regulating port 131 is still relatively fast. Negative pressure will be formed at the pressure regulating port 131 to produce a Venturi effect, which attracts external air to flow into the main pipe 10 through the pressure regulating port 131, thereby accelerating the inflation speed. When the air bag or other gas container is inflated to a certain degree, the gas flow rate decreases, and the pressure in the entire air intake channel increases. When the pressure reaches a certain threshold, the gas in the pressure regulating assembly 100 can be discharged to the outside through the pressure regulating port 131, so that the pressure regulating assembly 100 can also achieve the function of pressure relief. Compared with the existing pressure regulating valve, the pressure regulating assembly 100 of the utility model can not only speed up the inflation speed during inflation, but also relieve pressure when the pressure exceeds a certain threshold, thereby controlling the maximum pressure in the main air intake pipe. It has fewer parts and a simple structure, which makes its manufacturing cost lower and the assembly process simpler.

[0027] For example, this pressure regulating assembly 100 is set on the main air intake pipeline between the gas source and the valve group. When the valve group inflates the air bag through the branch pipeline, the pressure in the main air intake pipeline is about 0 to 23 kPa (gauge pressure) in the initial stage, and the inflation speed is significantly accelerated. When the pressure in the main air intake pipeline exceeds 23 kPa (gauge pressure), the negative pressure at the position of the pressure regulating port 131 disappears, and the gas in the main air intake pipeline begins to flow out from the pressure regulating port 131, achieving the effect of reducing pressure, so that the pressure in the main pipe 10 is stable. The diameter of the pressure regulating port 131 determines the pressure in the main pipe 10, and the pressure in the main pipe 10 can be adjusted by adjusting the diameter of the pressure regulating port 131. The inner diameter of the pressure regulating port 131 is different from the inner diameter ratio of the straight pipe body 12, and the pressure threshold that can be adjusted is also different.

[0028] For the above-mentioned contraction portion 11, in some embodiments, the ratio of the inner diameter of the straight tube body 12 to the maximum inner diameter of the contraction portion 11 is 0.35 to 0.5, so that when the gas flows from the contraction portion 11 to the straight tube body 12, it is equivalent to gradually entering and passing through a narrow pipe, thereby accelerating the fluid and increasing the inflation speed.

[0029] For the above expansion portion 13, in some embodiments, please refer to Figure 3 , the ratio of the inner diameter of the pressure regulating port 131 to the inner diameter of the straight tube body 12 is 0.4 to 0.7, so that the pressure regulating effect of the pressure regulating port 131 is better. Further, the expansion portion 13 satisfies: 0.3≤L1 / L2≤3, L1 is the distance between the pressure regulating port 131 and the end of the expansion portion 13 close to the straight tube body 12, and L2 is the distance between the pressure regulating port 131 and the end of the expansion portion 13 away from the straight tube body 12.

[0030] In some embodiments, the pressure regulating assembly 100 also includes a pressure regulating tube 20 connected to the pressure regulating port 131. The inner diameter of the pressure regulating tube 20 gradually increases from one end of the pressure regulating tube 20 close to the pressure regulating port 131 to the other end away from the pressure regulating port 131, so that the pressure regulating tube 20 can better assist the pressure regulating port 131 to accelerate the intake and regulate the exhaust.

[0031] In some embodiments, the contraction portion 11, the straight tube body 12 and the expansion portion 13 can be integrally formed, and the main tube 10 and the pressure regulating tube 20 can also be integrally formed to simplify the processing procedure, reduce the manufacturing cost, and make the pressure regulating assembly 100 more stable as a whole. Of course, the contraction portion 11, the straight tube body 12 and the expansion portion 13 can also be connected by welding, and the main tube 10 and the pressure regulating tube 20 can also be connected by welding. The contraction portion 11, the straight tube body 12, the expansion portion 13 and the pressure regulating tube 20 can be made of metal, plastic or other polymer materials.

[0032] In some embodiments, the pressure regulating assembly 100 also includes a silencer 30 disposed inside the pressure regulating pipe 20, and the silencer 30 is used to reduce the sound when the gas in the main pipe 10 flows out through the pressure regulating port 131. Preferably, the silencer 30 is disposed at one end of the pressure regulating pipe 20 away from the pressure regulating port 131 to achieve a better noise reduction effect. The silencer 30 is filled with high-efficiency sound-absorbing materials, such as glass wool, rock wool or polyester fiber, which can effectively absorb and consume sound wave energy and reduce noise intensity. When the gas passes through the silencer 30, the sound energy is converted into heat energy in the porous medium and absorbed, thereby achieving sound attenuation. The shape of the silencer 30 can be circular, square or polygonal.

[0033] In order to facilitate readers to understand the inventive concept of the utility model, the working process of the voltage regulating assembly 100 is described below:

[0034] Please also read Figure 4-5In actual application, the pressure regulating assembly 100 is arranged on the main air inlet pipeline between the air source and the valve group. When the air bag is inflated, the gas flows from the contraction part 11 to the expansion part 13. When the gas flows to the pressure regulating port 131, negative pressure is formed, which attracts external air to flow into the main pipe 10 (such as Figure 4 When the gas is inflated to a certain extent, the gas flow rate decreases, and the pressure in the main pipe 10 increases. At this time, the gas in the main pipe 10 can be discharged to the outside through the pressure regulating port 131 (as shown in the arrow). Figure 5 As shown by the arrow, pressure relief is achieved to stabilize the pressure in the main pipe 10.

[0035] In the embodiment of the utility model, the pressure regulating assembly 100 includes a main pipe 10, a pressure regulating pipe 20 and a silencer 30. The main pipe 10 includes a contraction part 11, a straight pipe body 12 and an expansion part 13 which are connected in sequence. The pressure regulating pipe 20 is connected to the pressure regulating port 131 of the expansion part 13, and the silencer 30 is arranged on the pressure regulating pipe 20. The pressure regulating assembly 100 can control and adjust the pressure in the main pipe 10 within a certain range. On the basis of satisfying the pressure regulating effect, the pressure regulating assembly 100 has fewer parts, so the manufacturing cost is low and the assembly process is relatively simple. In addition, the traditional pressure regulating valve opens and closes the pressure regulating port 131 through a movable iron core, which will cause a certain abnormal sound, while the pressure regulating assembly 100 of the utility model is not provided with a movable iron core, so the abnormal sound is reduced. In addition, when the pressure regulating assembly 100 is applied to the gas supply system, it can also inhale a certain amount of gas during the initial inflation to improve the inflation efficiency, and automatically deflate when the pressure exceeds a certain threshold to stabilize the pressure.

[0036] The utility model also provides an embodiment of a pneumatic system, including an air source, a control valve group and an air-using unit, the air source is connected to the control valve group via a first air supply pipeline, the control valve group is connected to the air-using unit via a second air supply pipeline, the first air supply pipeline is provided with the above-mentioned pressure regulating assembly 100, the function and structure of the pressure regulating assembly 100 can be referred to the above-mentioned embodiment, and will not be described one by one here.

[0037] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. A voltage regulating assembly, characterized in that: include: The main pipe includes a contraction portion, a straight pipe body and an expansion portion which are connected in sequence; Wherein, along the direction of the contraction portion away from one end of the straight tube body toward the other end of the straight tube body, the inner diameter of the contraction portion gradually decreases; The inner diameter of the expansion portion gradually increases along a direction from one end of the expansion portion close to the straight tube body to the other end away from the straight tube body; A pressure regulating port is provided on the side wall of the expansion portion.

2. The voltage regulating assembly according to claim 1, characterized in that: The pressure regulating assembly also includes a pressure regulating pipe connected to the pressure regulating port.

3. The voltage regulating assembly according to claim 2, characterized in that: The inner diameter of the pressure regulating tube gradually increases along a direction from one end of the pressure regulating tube close to the pressure regulating port to the other end away from the pressure regulating port.

4. The voltage regulating assembly according to claim 2, characterized in that: The pressure regulating assembly also includes a silencer sheet arranged inside the pressure regulating pipe.

5. The voltage regulating assembly according to claim 1, characterized in that: The ratio of the inner diameter of the pressure regulating port to the inner diameter of the straight tube body is 0.4 to 0.

7.

6. The voltage regulating assembly according to claim 1, characterized in that: The ratio of the inner diameter of the straight tube body to the maximum inner diameter of the contraction portion is 0.35 to 0.

5.

7. The voltage regulating assembly according to claim 1, characterized in that: The voltage regulating component satisfies: 0.3≤L1 / L2≤3; The L1 is the distance between the pressure regulating port and one end of the expansion portion close to the straight tube body, and the L2 is the distance between the pressure regulating port and one end of the expansion portion away from the straight tube body.

8. A pneumatic system, characterized in that: It includes an air source, a control valve group and an air-using unit, the air source is connected to the control valve group via a first air supply pipeline, the control valve group is connected to the air-using unit via a second air supply pipeline, and the first air supply pipeline is provided with a pressure regulating assembly as described in any one of claims 1 to 7.

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