One-way valve with low noise

Abstract

The utility model relates to the technical field of one-way valves, in particular to a low-noise one-way valve which comprises a valve body and a connecting pipe arranged at the front end of the valve body, a flow inlet is formed in the middle end of the connecting pipe, a fixing plate is fixedly arranged on the inner wall of the valve body, a sliding rod is inserted in the middle end of the fixing plate, and a first spring is arranged on the outer wall of the sliding rod in a sleeved mode. The outer wall of the end, away from the fixing plate, of the sliding rod is fixedly sleeved with a valve seat. After gas passes through, the valve seat is reset under the action of the first spring and the second spring, the protrusion enters the flow inlet, the flow inlet is sealed till the valve seat makes contact with the connecting pipe and cannot continue to move, the valve seat is buffered through the first spring and the second spring, the impact force generated by contact of the valve seat and the connecting pipe is reduced, and the sealing effect of the valve seat is improved. The noise generated in the collision process of the valve seat and the connecting pipe is reduced, the loss of the device in the collision process of the valve seat is reduced, the service life of the one-way valve is prolonged, and the use safety performance of a machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, and in particular to a one-way valve with low noise. Background Technology

[0002] A check valve is a valve that allows fluid to flow only through the inlet, but prevents backflow of the medium through the outlet; it is commonly known as a one-way valve. Also called a non-return valve or check valve, it is used in hydraulic systems to prevent oil from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction. Check valves come in two types: straight-through and right-angle. Straight-through check valves are installed on pipelines with a threaded connection, while right-angle check valves are available with threaded connections, plate connections, and flange connections.

[0003] In actual use, under the impact of airflow, the valve core and valve seat of the check valve collide, resulting in noise pollution, shortening the service life of the check valve, and causing damage to the machine. Utility Model Content

[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0005] Specifically, the technical problem to be solved by this utility model is to provide a low-noise one-way valve to solve the technical problem that, in actual use, the valve core and valve seat collide under the impact of airflow, resulting in noise pollution, shortening the service life of the one-way valve, and causing damage to the machine.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A low-noise one-way valve includes a valve body and a connecting pipe disposed at the front end of the valve body. The connecting pipe has an inlet at its middle end. A fixing plate is fixedly disposed on the inner wall of the valve body. A slide rod is inserted into the middle end of the fixing plate. A first spring is sleeved on the outer wall of the slide rod. A valve seat is fixedly sleeved on the outer wall of the slide rod away from the fixing plate. A protrusion is connected to the end of the slide rod away from the fixing plate. Two sets of buffer components are provided at both ends of the valve seat. A toothed ring is connected to the end of the valve body away from the connecting pipe. An outlet is disposed at the middle end of the toothed ring.

[0008] The buffer assembly includes sleeves located at both ends of the inner wall of the valve body. A piston is inserted inside the sleeve, and a connecting rod is connected to one end of the piston. A second spring is sleeved on the outer wall of the end of the connecting rod located inside the sleeve.

[0009] As an improved technical solution, the first spring is movably sleeved on the outer wall of the slide rod, and the front and rear ends of the first spring are respectively fixedly connected to the valve seat and the fixing plate, and the slide rod is movably inserted into the middle of the fixing plate.

[0010] As an improved technical solution, the protrusion is configured as a hemispherical shape, the protrusion is movably inserted into the inner wall of the inlet, the outer wall of the protrusion is in contact with the inner wall of the inlet, and the length of the valve seat is greater than the diameter of the inlet.

[0011] As an improved technical solution, the end of the connecting rod away from the piston is hinged to the outer wall of the valve seat, the piston is movably inserted into the inner wall of the sleeve, the front and rear ends of the second spring are fixedly connected to the sleeve and the piston respectively, the connecting rod movably passes through the sleeve, and the end of the sleeve away from the valve seat is hinged to the inner wall of the valve body.

[0012] As an improved technical solution, a silencing plate is fixedly inserted into the inner wall of the valve body, and several sets of corrugated channels are evenly opened through the outer wall of the silencing plate, and the corrugated channels are corrugated.

[0013] As an improved technical solution, a hollow spiral silencer tube is fixedly sleeved on the outer wall of the valve body.

[0014] As an improved technical solution, the outer wall of the toothed ring is uniformly provided with several sets of noise-absorbing strips.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] 1. In this utility model, after gas passes through, the valve seat is reset under the action of the first and second springs, and the protrusion enters the inlet to seal the inlet until the valve seat and the connecting pipe contact and can no longer move. The first and second springs buffer the valve seat, reduce the impact force generated by the contact between the valve seat and the connecting pipe, reduce the noise generated during the collision between the valve seat and the connecting pipe, reduce the wear and tear on the device during the valve seat impact, extend the service life of the one-way valve, and improve the safety performance of the machine.

[0017] 2. In this utility model, when gas enters the valve body and passes through the silencer plate, the airflow undergoes multiple refractions as it passes through the corrugated channel, which mitigates the pressure pulsation of the airflow to a certain extent, reduces the impact force of the airflow colliding with the valve body, prevents the direct transmission of noise, and allows the airflow to flow out of the outlet in a relatively stable state, reducing the pulsating noise of the airflow. Furthermore, the hollow spiral silencer tube can absorb the airflow sound generated inside the valve body, reducing the internal noise of the valve body. When the airflow passes through the toothed ring, the noise generated by the friction and impact between the airflow and the toothed ring can be absorbed by the silencer strip, making the noise reduction effect of the airflow better and increasing the working quality of the one-way valve. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the low-noise one-way valve of this utility model.

[0020] Figure 2 This is a three-dimensional cross-sectional view of the low-noise one-way valve of this utility model.

[0021] Figure 3 This is a three-dimensional cross-sectional view of the buffer assembly of the low-noise one-way valve of this utility model.

[0022] Figure 4 This is a schematic diagram of some components of the low-noise one-way valve of this utility model.

[0023] Figure 5 This is a three-dimensional cross-sectional view of the silencer plate of the low-noise one-way valve of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Valve body; 2. Connecting pipe; 3. Inlet; 4. Fixing plate; 5. Slide rod; 6. First spring; 7. Valve seat; 8. Protrusion; 9. Buffer assembly; 91. Sleeve; 92. Piston; 93. Second spring; 94. Connecting rod; 10. Silencer plate; 11. Corrugated channel; 12. Hollow spiral silencing pipe; 13. Toothed ring; 14. Outlet; 15. Silencer strip. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0029] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] like Figures 1-4 As shown in the figure, this embodiment provides a low-noise one-way valve, including a valve body 1 and a connecting pipe 2 disposed at the front end of the valve body 1. The connecting pipe 2 has an inlet 3 at the middle end. A fixing plate 4 is fixedly disposed on the inner wall of the valve body 1. A slide rod 5 is inserted into the middle end of the fixing plate 4. A first spring 6 is sleeved on the outer wall of the slide rod 5. A valve seat 7 is fixedly sleeved on the outer wall of the end of the slide rod 5 away from the fixing plate 4. A protrusion 8 is connected to the end of the slide rod 5 away from the fixing plate 4. Two sets of buffer components 9 are provided at both ends of the valve seat 7. A toothed ring 13 is connected to the end of the valve body 1 away from the connecting pipe 2. An outlet 14 is disposed at the middle end of the toothed ring 13.

[0031] The buffer assembly 9 includes sleeves 91 located at both ends of the inner wall of the valve body 1. A piston 92 is inserted inside the sleeve 91. One end of the piston 92 is connected to a connecting rod 94. A second spring 93 is sleeved on the outer wall of the end of the connecting rod 94 located inside the sleeve 91.

[0032] The first spring 6 is movably sleeved on the outer wall of the slide rod 5. The front and rear ends of the first spring 6 are fixedly connected to the valve seat 7 and the fixing plate 4 respectively. The slide rod 5 is movably inserted into the middle of the fixing plate 4.

[0033] The protrusion 8 is hemispherical and is movably inserted into the inner wall of the inlet 3. The outer wall of the protrusion 8 is in contact with the inner wall of the inlet 3. The length of the valve seat 7 is greater than the diameter of the inlet 3.

[0034] The end of the connecting rod 94 away from the piston 92 is hinged to the outer wall of the valve seat 7. The piston 92 is movably inserted into the inner wall of the sleeve 91. The front and rear ends of the second spring 93 are fixedly connected to the sleeve 91 and the piston 92 respectively. The connecting rod 94 moves through the sleeve 91. The end of the sleeve 91 away from the valve seat 7 is hinged to the inner wall of the valve body 1.

[0035] When gas enters through inlet 3, it pushes protrusion 8, causing valve seat 7 to compress the first spring 6. Simultaneously, slide rod 5 slides along fixed plate 4. As valve seat 7 moves, due to the hinged connection between connecting rod 94 and valve seat 7, and the hinged connection between sleeve 91 and inner wall of valve body 1, valve seat 7 pulls connecting rod 94 outward along sleeve 91 during its movement. This simultaneously causes piston 92 to compress the second spring 93, and sleeve 91 rotates a certain angle in the direction of valve body 1 until protrusion 8 exits from inlet 3. Gas then flows through valve body 1 from outlet 1. The gas is discharged from four points. After the gas passes through, the valve seat 7 is reset under the action of the first spring 6 and the second spring 93. The protrusion 8 enters the inlet 3 and seals the inlet 3 until the valve seat 7 and the connecting pipe 2 come into contact and can no longer move. The first spring 6 and the second spring 93 buffer the valve seat 7, reduce the impact force generated by the contact between the valve seat 7 and the connecting pipe 2, reduce the noise generated during the collision between the valve seat 7 and the connecting pipe 2, reduce the wear and tear on the device during the impact of the valve seat 7, extend the service life of the one-way valve, and improve the safety performance of the machine.

[0036] like Figures 1-5 As shown, a silencing plate 10 is fixedly inserted into the inner wall of the valve body 1, and several sets of corrugated channels 11 are evenly opened through the outer wall of the silencing plate 10. The corrugated channels 11 are corrugated.

[0037] A hollow spiral silencer tube 12 is fixedly sleeved on the outer wall of the valve body 1.

[0038] The outer wall of the toothed ring 13 is evenly provided with several sets of sound-absorbing strips 15.

[0039] When gas enters the valve body 1 and passes through the silencer plate 10, the airflow undergoes multiple refractions as it passes through the corrugated channel 11, which mitigates the pressure pulsation of the airflow to a certain extent, reduces the impact force of the airflow colliding with the valve body 1, and prevents the direct transmission of noise, allowing the airflow to flow out of the outlet 14 in a relatively stable state, reducing the pulsating noise of the airflow. In addition, the hollow spiral silencer tube 12 can absorb the airflow sound generated inside the valve body 1, reducing the noise inside the valve body 1. When the airflow passes through the toothed ring 13, the noise generated by the friction and impact between the airflow and the toothed ring 13 can be absorbed by the silencer strip 15, making the noise reduction effect of the airflow better and increasing the working quality of the one-way valve.

[0040] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A low-noise one-way valve, comprising a valve body (1) and a connecting pipe (2) disposed at the front end of the valve body (1), characterized in that: The connecting pipe (2) has an inlet (3) at the middle end. The valve body (1) has a fixed plate (4) fixed on its inner wall. The fixed plate (4) has a slide rod (5) inserted at the middle end. The slide rod (5) has a first spring (6) sleeved on its outer wall. The slide rod (5) has a valve seat (7) fixedly sleeved on its outer wall at the end away from the fixed plate (4). The slide rod (5) has a protrusion (8) connected to the end away from the fixed plate (4). The valve seat (7) has two sets of symmetrical buffer components (9) at both ends. The valve body (1) has a toothed ring (13) connected to the end away from the connecting pipe (2). The toothed ring (13) has an outlet (14) at the middle end. The buffer assembly (9) includes sleeves (91) located at both ends of the inner wall of the valve body (1). A piston (92) is inserted inside the sleeve (91). A connecting rod (94) is connected to one end of the piston (92). A second spring (93) is sleeved on the outer wall of the end of the connecting rod (94) located inside the sleeve (91).

2. The low-noise check valve according to claim 1, characterized in that: The first spring (6) is movably sleeved on the outer wall of the slide rod (5). The front and rear ends of the first spring (6) are fixedly connected to the valve seat (7) and the fixing plate (4) respectively. The slide rod (5) is movably inserted into the middle end of the fixing plate (4).

3. The low-noise check valve according to claim 1, characterized in that: The protrusion (8) is hemispherical and is movably inserted into the inner wall of the inlet (3). The outer wall of the protrusion (8) and the inner wall of the inlet (3) are in contact. The length of the valve seat (7) is greater than the diameter of the inlet (3).

4. The low-noise check valve according to claim 1, characterized in that: The end of the connecting rod (94) away from the piston (92) is hinged to the outer wall of the valve seat (7). The piston (92) is movably inserted into the inner wall of the sleeve (91). The front and rear ends of the second spring (93) are fixedly connected to the sleeve (91) and the piston (92) respectively. The connecting rod (94) moves through the sleeve (91). The end of the sleeve (91) away from the valve seat (7) is hinged to the inner wall of the valve body (1).

5. The low-noise check valve according to claim 1, characterized in that: The valve body (1) has a sound-absorbing plate (10) fixedly inserted into its inner wall. The outer wall of the sound-absorbing plate (10) has several sets of corrugated channels (11) evenly distributed through it. The corrugated channels (11) are corrugated.

6. The low-noise one-way valve according to claim 1, characterized in that: The valve body (1) has a hollow spiral silencer tube (12) fixedly sleeved on its outer wall.

7. The low-noise check valve according to claim 1, characterized in that: The outer wall of the toothed ring (13) is uniformly provided with several sets of sound-absorbing strips (15).

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