Silencing check valve

Abstract

The utility model relates to the technical field of valves, and provides a silencing check valve which is long in service life and not prone to being damaged and leaking water, and comprises a valve body and an opening and closing elastic rod arranged on the inner wall of the valve body in a sliding mode, and a sealing block attached to the inner wall of the valve body is arranged at the bottom end of the opening and closing elastic rod. The water outlet end of the valve body is detachably provided with an impact absorption pipe in a penetrating mode through threaded connection, and when the valve body is rapidly sealed by the sealing block, flowing water flow influenced by inertia is guided into the impact absorption pipe, so that water flow impact is converted and absorbed by the impact absorption pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a silencer check valve. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce a movement to block the backflow of the medium. The function of this type of valve is to allow the medium to flow in one direction only and prevent it from flowing in the opposite direction. Under the action of the fluid pressure flowing in one direction, the disc opens; when the fluid flows in the opposite direction, the fluid pressure and the self-recovery of the disc act on the valve seat, thereby cutting off the flow. It is widely used in water supply and drainage systems, high-rise construction pipeline networks and other places.

[0003] Although the above-mentioned existing technology can solve the corresponding technical problems, it still has certain defects: when the existing silencer check valve is conveying high-flow water, if the water supply end is suddenly cut off and the water flow cannot continue to be input, the water flow in the water outlet end of the check valve will produce a reverse flow. At this time, the check valve will quickly close under the action of the elastomer to prevent reverse flow, but due to the extremely fast closing speed, the reverse flow of water will be suddenly cut off, and the inertia of the water flow will cause it to flow irregularly and quickly in the inner wall of the water outlet end of the check valve, causing the inner wall of the check valve to be subjected to strong water flow impact. Repeated such behavior can easily cause the check valve to be damaged and leak, seriously affecting the service life of the check valve. Utility Model Content

[0004] The purpose of the utility model is to provide a silencer check valve with a long service life and not prone to damage or leakage in view of the defects and shortcomings of the existing technology.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a silencer check valve, comprising a valve body and an opening and closing elastic rod slidably arranged on the inner wall of the valve body, the bottom end of the opening and closing elastic rod is provided with a closing block that fits the inner wall of the valve body, the water outlet end of the valve body is detachably penetrated by a threaded connection and is provided with an impact absorption tube, when the valve body is quickly closed by the closing block, the flowing water affected by inertia is introduced into the impact absorption tube, so that the water flow impact is converted and absorbed by the impact absorption tube.

[0006] A further improvement is that the shock absorbing tube includes a down-pressure tube that penetrates and is detachably arranged at the water outlet end of the valve body, and a threaded layer arranged on the top outer wall of the down-pressure tube and engaged with the valve body, and a down-pressure block is fitted and slidably provided on the inner wall of the down-pressure tube.

[0007] A further improvement is that: a compression elastic column is further provided on the inner wall of the bottom of the downward pressure tube, and the top end of the compression elastic column is against the bottom surface of the downward pressure block.

[0008] A further improvement is that a closing tube is provided at the top end of the pressing-down tube, the closing tube being connected to the pressing-down tube and the outer wall of the closing tube being in sealing contact with the valve body.

[0009] A further improvement is that the outer wall of the closed tube is provided with a plurality of closed rings.

[0010] A further improvement is that the pressing block includes a side block that fits and slides with the inner wall of the pressing tube and a water pressure sheet arranged in the side block.

[0011] A further improvement is that: the top surface of the water pressure plate is further provided with a pressure plate which is slidably connected to the inner side block, and a buffer cylinder is provided between the top surface of the water pressure plate and the bottom surface of the pressure plate.

[0012] A further improvement is that: the surface of the side block that is in contact with the lower pressure pipe is provided with a friction block that is in contact with the inner wall of the lower pressure pipe.

[0013] A further improvement is that: the surface of the friction block that is in contact with the lower pressure pipe is provided with a friction groove.

[0014] After adopting the above technical solution, the beneficial effect of the utility model is as follows: when the valve is closed, the utility model will guide the water that flows rapidly due to inertia into the impact absorption tube due to the pressure difference, and then the impact of the water flow is directly applied to the lower pressure block, thereby causing the lower pressure block to move downward along the lower pressure tube, and offset the impact force of the water flow through friction during the extrusion process, and at the same time cooperate with the compression elastic column to absorb the impact force and convert it into elastic force, thereby making the impact force of the water flow fully released and converted, reducing the damage of the water flow impact force to the inner cavity of the valve body, making the valve body not easy to be damaged and leaking, and having a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative labor.

[0016] Figure 1 This is a schematic diagram of the structure of the front cross-section of the check valve of the utility model;

[0017] Figure 2 This is a schematic structural diagram of a front cross-section of the impact absorbing tube of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the front cross section of the lower pressing block of the utility model. DETAILED DESCRIPTION

[0019] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0020] See Figure 1-3 As shown, the technical solution adopted in this specific embodiment is: a silencer check valve, including a valve body 1 and an opening and closing elastic rod 4 slidably arranged on the inner wall of the valve body 1, the bottom end of the opening and closing elastic rod 4 is provided with a closing block 2 that fits the inner wall of the valve body 1, the water outlet end of the valve body 1 is detachably penetrated by a shock absorbing pipe 5 through a threaded connection, and the shock absorbing pipe 5 includes a down-pressure pipe 51 that penetrates and is detachably arranged on the water outlet end of the valve body 1 and a threaded layer 52 that is arranged on the outer wall of the top of the down-pressure pipe 51 and is meshed with the valve body 1. The inner wall of the down-pressure tube 51 is fitted and slidably provided with a down-pressure block 54, which includes a side block 31 fitted and slidably with the inner wall of the down-pressure tube 51 and a water pressure sheet 34 provided in the side block 31. When the valve body 1 is quickly closed by the closing block 2, the flowing water affected by inertia is introduced into the shock absorbing tube 5, so that the water flow impact is converted and absorbed by the shock absorbing tube 5. When in use, the valve body 1 is connected to the external pipeline, and the water flow flows into the inner cavity of the valve body 1 located at the bottom surface of the closing block 2 and flows out from the other end. When the water flow enters When the valve body 1 is quickly closed by the closing block 2, the reverse flow will flow rapidly in the valve body 1 due to inertia and generate strong water pressure. At this time, the water flow will be guided into the shock absorbing pipe 5 by the pressure difference, and the valve body 1 will be closed quickly. The water flows into the down-pressure pipe 51 and presses the down-pressure block 54 through the impact of the water flow, so that the water pressure plate 34 of the down-pressure block 54 generates downward pressure, thereby pushing the side block 31 to slide along the inner wall of the down-pressure pipe 51. The friction between the side block 31 and the down-pressure pipe 51 offsets part of the impact force of the water flow, and as the entire down-pressure block 54 continues to slide, it continuously absorbs the impact force of the water flow, thereby fully releasing and transforming the impact force of the water flow, reducing the damage of the water flow impact force to the inner cavity of the valve body 1, making the valve body 1 less likely to be damaged or leaked, and having a longer service life;

[0021] A compression elastic column 53 is further provided on the inner wall of the bottom of the down-pressure tube 51. The top of the compression elastic column 53 abuts against the bottom surface of the down-pressure block 54. This is beneficial for providing additional support to the down-pressure block 54 through the compression elastic column 53. When the down-pressure block 54 is impacted by the water flow, it deforms to absorb the impact force, so that the impact force is absorbed more completely. After the impact disappears, the down-pressure block 54 can be pushed back to the top of the down-pressure tube 51 by the elastic force.

[0022] The top of the pressure-down pipe 51 is further provided with a closing pipe 55 which is connected to the pressure-down pipe 51 and whose outer wall is sealed and fitted with the valve body 1. This facilitates the closing pipe 55 to be inserted into and fitted into the valve body 1 to improve the sealing performance between the closing pipe 55 and the valve body 1 and improve the water leakage prevention capability.

[0023] The outer wall of the sealing tube 55 is provided with a plurality of sealing rings 56. In this embodiment, two sealing rings are provided, which is beneficial to further improve the sealing between the sealing tube 55 and the valve body 1.

[0024] The top surface of the water pressure piece 34 is further provided with a pressure plate 33 which is slidably connected to the inside of the side block 31. A buffer cylinder 35 is provided between the top surface of the water pressure piece 34 and the bottom surface of the pressure plate 33. When water flows into the water pressure piece 34, it first contacts the pressure plate 33. The pressure plate 33 then presses down the buffer cylinder 35 to absorb part of the water flow impact. The water pressure piece 34 is not pressed down until the water flow impact is too large. This not only increases the upper limit of impact absorption, but also absorbs normal water flow pressure during normal water flow use, preventing the lower pressure block 54 from moving up and down during normal water flow use, thereby increasing the service life of the lower pressure block 54.

[0025] The side block 31 is provided with a friction block 32 on the surface of the pressure tube 51, which is in contact with the inner wall of the pressure tube 51. This helps to increase the friction between the side block 31 and the inner wall of the pressure tube 51, so that the impact force is better offset.

[0026] The friction block 32 is provided with a friction groove 36 on the surface of the lower pressure tube 51 , which is conducive to further increasing the sliding friction force.

[0027] The working principle of the utility model: When the utility model is used, the valve body 1 is connected to the external pipe, and water flows into the inner cavity of the valve body 1 at the bottom of the closing block 2 and flows out from the other end. When the water flows in, the closing block 2 is moved upward by the water pressure, a gap is generated between the valve body 1 and the opening and closing elastic rod 4 is squeezed at the same time. When the water inflow is cut off, the closing block 2 can be quickly dropped and the valve body 1 is re-closed by the reverse water pressure and the opening and closing elastic rod 4, so that the water cannot flow back. When the valve body 1 is quickly closed by the closing block 2, the reverse water flow will flow quickly in the valve body 1 due to inertia, and A strong water pressure is generated. At this time, the water flow will be introduced into the impact absorption tube 5 through the pressure difference, and quickly flow into the down-pressure tube 51. The down-pressure block 54 is pressed by the impact of the water flow, so that the water pressure plate 34 of the down-pressure block 54 generates downward pressure, and then pushes the side block 31 to slide along the inner wall of the down-pressure tube 51. The friction between the side block 31 and the down-pressure tube 51 offsets part of the water flow impact force, and as the entire down-pressure block 54 continues to slide, it continuously absorbs the water flow impact force, thereby making the water flow impact force fully released and transformed, reducing the damage of the water flow impact force to the inner cavity of the valve body 1, making the valve body 1 not easy to be damaged and leaking, and having a longer service life.

[0028] This utility model protects the product's structure; the component models are not the subject of this utility model's protection and are generally known technology. Any commercially available component that can achieve the aforementioned functions of this utility model can be used as an alternative. Therefore, component models and other parameters are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the components.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements shall fall within the scope of the present invention as claimed. The scope of protection claimed in the present invention shall be defined by the appended claims and their equivalents. Any details not described in the present invention are well known to those skilled in the art.

Claims

1. A silencer check valve, comprising a valve body (1) and an opening and closing elastic rod (4) slidably arranged on the inner wall of the valve body (1), wherein the bottom end of the opening and closing elastic rod (4) is provided with a closing block (2) in contact with the inner wall of the valve body (1), characterized in that: The water outlet end of the valve body (1) is detachably penetrated and provided with a shock absorbing pipe (5) through a threaded connection. When the valve body (1) is quickly closed by the closing block (2), the flowing water affected by inertia is introduced into the shock absorbing pipe (5), so that the water flow impact is converted and absorbed by the shock absorbing pipe (5).

2. A muffler check valve according to claim 1, characterized in that: The shock absorbing tube (5) comprises a down-pressure tube (51) that penetrates and is detachably arranged at the water outlet end of the valve body (1), and a threaded layer (52) that is arranged on the top outer wall of the down-pressure tube (51) and is meshed with the valve body (1). A down-pressure block (54) is provided on the inner wall of the down-pressure tube (51) so as to be fitted and slidable.

3. The muffler check valve according to claim 2, characterized in that: A compression elastic column (53) is further provided on the inner wall of the bottom of the downward pressing tube (51), and the top end of the compression elastic column (53) abuts against the bottom surface of the downward pressing block (54).

4. The muffler check valve according to claim 2, characterized in that: The top end of the pressure-down pipe (51) is further provided with a closing pipe (55) which is in communication with the pressure-down pipe (51) and whose outer wall is sealed and fitted with the valve body (1).

5. The muffler check valve according to claim 4, characterized in that: The outer wall of the closed tube (55) is provided with a plurality of closed rings (56).

6. The muffler check valve according to claim 2, characterized in that: The lower pressing block (54) comprises a side block (31) that fits and slides against the inner wall of the lower pressing tube (51) and a water pressure sheet (34) disposed in the side block (31).

7. The muffler check valve according to claim 6, characterized in that: The top surface of the water pressure plate (34) is further provided with a pressure plate (33) slidably connected to the inside of the side block (31), and a buffer cylinder (35) is provided between the top surface of the water pressure plate (34) and the bottom surface of the pressure plate (33).

8. The muffler check valve according to claim 6, characterized in that: The side block (31) is provided on the surface of the side block (31) that is in contact with the lower pressure tube (51) with a friction block (32) that is in contact with the inner wall of the lower pressure tube (51).

9. The muffler check valve according to claim 8, characterized in that: The friction block (32) is provided with a friction groove (36) on the surface of the lower pressure tube (51).

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