CN223388063U - Silencing check valve - Google Patents

Abstract

The utility model relates to the technical field of valves, and provides a silencer check valve with a long service life and not prone to damage or leakage, comprising a valve body and an opening and closing elastic rod slidably arranged on the inner wall of the valve body, a closing block which is in contact with the inner wall of the valve body at the bottom end of the opening and closing elastic rod, an impact absorption tube which is detachably penetrated by a threaded connection at the water outlet end of the valve body, and 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 impact of the water flow is converted and absorbed by the impact absorption tube.

Description

Silencing check valve

Technical Field

The utility model relates to the technical field of valves, in particular to a silencing check valve.

Background

The check valve is a valve with a circular valve clack and can stop the backflow of a medium by the action of the self weight and the pressure of the medium, the check valve has the functions of only allowing the medium to flow in one direction and preventing the medium from flowing in the opposite direction, the valve clack is opened under the action of the fluid pressure flowing in one direction, and when the fluid flows in the opposite direction, the valve clack acts on a valve seat by the fluid pressure and the self weight of the valve clack so as to cut off the flow, and the check valve is widely applied to places such as water supply and drainage systems, high-rise building pipe networks and the like.

Although the prior art can solve the corresponding technical problems, the existing silencing check valve has certain defects that when the existing silencing check valve is used for conveying water flow with high flow rate, if a water supply end is suddenly cut off, the water flow in a water outlet end of the check valve cannot be continuously input, the check valve can be rapidly closed under the action of an elastomer to prevent backflow, the reverse flow is prevented, but the reverse flow is suddenly blocked due to extremely high closing speed, and further the water flow can be caused to irregularly and rapidly flow in the inner wall of the water outlet end of the check valve due to inertia of the water flow, so that the inner wall of the check valve is subjected to strong water flow impact, the check valve is easily damaged and leaked repeatedly, and the service life of the check valve is seriously influenced.

Disclosure of utility model

The utility model aims to overcome the defects and shortcomings of the prior art and provide the silencing check valve which is long in service life and difficult to damage and leak.

The utility model adopts the following technical scheme that the silencing check valve comprises a valve body and an opening and closing elastic rod which is arranged on the inner wall of the valve body in a sliding manner, wherein a sealing block which is attached to the inner wall of the valve body is arranged at the bottom end of the opening and closing elastic rod, an impact absorption pipe is detachably penetrated through the water outlet end of the valve body through threaded connection, and when the valve body is rapidly sealed by the sealing block, flowing water flow influenced by inertia is led into the impact absorption pipe, so that the water flow impact is converted and absorbed by the impact absorption pipe.

The impact absorbing pipe comprises a pressing pipe penetrating and detachably arranged at the water outlet end of the valve body and a threaded layer arranged on the outer wall of the top of the pressing pipe and connected with the valve body in a meshed mode, and the inner wall of the pressing pipe is attached to the pressing block in a sliding mode.

The improved structure is that the inner wall of the bottom of the pressing pipe is also provided with a compression elastic column, and the top end of the compression elastic column is propped against the bottom surface of the pressing block.

The further improvement is that the top end of the pressing pipe is also provided with a closed pipe which is communicated with the pressing pipe and the outer wall of which is in close fit with the valve body.

The further improvement is that the outer wall of the closed pipe is provided with a plurality of closed rings.

The lower pressing block comprises a side block which is attached to the inner wall of the lower pressing pipe and slides, and a water pressing sheet arranged in the side block.

The hydraulic pressure piece is characterized in that the top surface of the hydraulic pressure piece is also provided with a pressure plate which is connected with the side block in a sliding way, and a buffer cylinder is arranged between the top surface of the hydraulic pressure piece and the bottom surface of the pressure plate.

The friction block attached to the inner wall of the pressing pipe is arranged on the surface of the side block attached to the pressing pipe.

The friction block is attached to the surface of the pressing pipe and is provided with a friction groove.

After the technical scheme is adopted, the valve has the beneficial effects that when the valve is closed, water which flows rapidly due to inertia is led into the impact absorption pipe due to pressure difference, so that the impact of water flow is directly applied to the lower pressing block, the lower pressing block moves downwards along the lower pressing pipe, the impact force of the water flow is counteracted by friction force in the extrusion process, and meanwhile, the impact force is absorbed and converted into elasticity by being matched with the compression elastic column, so that the impact force of the water flow is fully and slowly released and converted, the damage of the impact force of the water flow to the inner cavity of the valve body is reduced, the valve body is not easy to damage and leak water, and the service life is long.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic elevational cross-sectional view of a check valve of the present utility model;

FIG. 2 is a schematic structural view in elevation of a cross-section of an impact absorbing tube of the present utility model;

FIG. 3 is a schematic diagram of the structure of the front section of the lower pressing block of the utility model.

Detailed Description

The utility model will now be further described with reference to the drawings and specific examples.

Referring to fig. 1-3, the technical scheme adopted in the specific embodiment is as follows: the silencing check valve comprises a valve body 1 and an opening and closing elastic rod 4 arranged on the inner wall of the valve body 1 in a sliding manner, wherein a sealing block 2 attached to the inner wall of the valve body 1 is arranged at the bottom end of the opening and closing elastic rod 4, an impact absorption pipe 5 is detachably penetrated through the water outlet end of the valve body 1 through threaded connection, the impact absorption pipe 5 comprises a pressing pipe 51 penetrating through and detachably arranged at the water outlet end of the valve body 1 and a threaded layer 52 which is arranged on the outer wall of the top of the pressing pipe 51 and is in meshed connection with the valve body 1, a pressing block 54 is attached to the inner wall of the pressing pipe 51 and is arranged in a sliding manner, the pressing block 54 comprises a side block 31 attached to the inner wall of the pressing pipe 51 and a hydraulic sheet 34 arranged in the side block 31, when the valve body 1 is rapidly sealed by the sealing block 2, flowing water flow influenced by inertia is led into the impact absorption pipe 5, when the water flow is disconnected, the sealing block 2 can quickly fall down and reseal the valve body 1 by the countercurrent water flow pressure and the opening and closing elastic rod 4, so that the water flow can not flow reversely, when the valve body 1 is quickly sealed by the sealing block 2, the countercurrent water flow can quickly flow in the valve body 1 due to inertia and generate strong water pressure, and the water flow is led into the impact absorbing pipe 5 by the pressure difference and quickly gushed into the pressing pipe 51, the water pressure sheet 34 of the lower pressing block 54 is pressed by water flow impact to generate downward pressure, so that the side block 31 is pushed to slide along the inner wall of the lower pressing pipe 51, the friction force between the side block 31 and the lower pressing pipe 51 counteracts part of the water flow impact force, and the water flow impact force is continuously absorbed along with the continuous sliding of the whole lower pressing block 54, so that the water flow impact force is fully and slowly released and converted, the damage of the water flow impact force to the inner cavity of the valve body 1 is reduced, the valve body 1 is not easy to be damaged and leaked, and the service life is long;

The inner wall of the bottom of the pressing pipe 51 is further provided with a compression elastic column 53, the top end of the compression elastic column 53 abuts against the bottom surface of the lower pressing block 54, which is favorable for providing additional support for the lower pressing block 54 through the compression elastic column 53, and additionally absorbing impact force through deformation when the lower pressing block 54 is impacted by water flow, so that the impact force is absorbed more completely, and after the impact disappears, the pressing block 54 can be pushed back to the top of the pressing pipe 51 through elasticity;

The top end of the pressing pipe 51 is also provided with a closed pipe 55 which is communicated with the pressing pipe 51 and the outer wall of which is in close fit with the valve body 1, so that the sealing property between the pressing pipe and the valve body 1 is improved and the water leakage preventing capability is improved by inserting and fitting the closed pipe 55 into the valve body 1;

the outer wall of the closed tube 55 is provided with a plurality of closed rings 56, and two closed rings are arranged in the embodiment, so that the tightness between the closed tube 55 and the valve body 1 is further improved;

The top surface of the water pressure sheet 34 is also provided with a pressure plate 33 which is in sliding connection with the side block 31, a buffer air cylinder 35 is arranged between the top surface of the water pressure sheet 34 and the bottom surface of the pressure plate 33, when water flows impact the water pressure sheet 34, the pressure plate 33 is firstly contacted with the pressure plate 33 to downwards press the buffer air cylinder 35 to absorb part of water flow impact, and the water pressure sheet 34 is downwards pressed only when the water flow impact is overlarge, so that the upper limit of impact absorption can be improved, and the normal water flow pressure can be absorbed during normal water-through use, so that the downwards pressing block 54 is prevented from moving upwards and downwards during normal water-through use, and the service life of the downwards pressing block 54 is prolonged;

The friction block 32 attached to the inner wall of the pressing pipe 51 is arranged on the surface of the side block 31 attached to the pressing pipe 51, so that friction force between the side block 31 and the inner wall of the pressing pipe 51 is increased, and impact force is better counteracted;

The friction block 32 is attached to the surface of the pressing pipe 51, and is provided with a friction groove 36, which is beneficial to further increasing the sliding friction force.

When the valve is used, the valve body 1 is connected into an external pipeline, water flows in from an inner cavity of the bottom surface of the sealing block 2 of the valve body 1 and flows out from the other end, when the water flows in, the sealing block 2 moves upwards through water pressure, and meanwhile, the elastic rod 4 is extruded and opened, when the water flow is disconnected, the sealing block 2 quickly drops down and the valve body 1 is closed again through the countercurrent water pressure and the elastic rod 4, so that the water flow cannot flow reversely, when the valve body 1 is quickly closed by the sealing block 2, the countercurrent water flow can quickly flow in the valve body 1 due to inertia and generate strong water pressure, at the moment, the water flow is led into the impact absorption pipe 5 through pressure difference, quickly flows into the pressing down pipe 51, the water pressure piece 34 of the pressing down block 54 is pressed through water pressure impact, the pressing down block 54 generates downward pressure, the friction force between the side block 31 and the pressing down pipe 51 slides along the inner wall of the pressing down pipe 51, the whole pressing block 54 is easily converted into part along with the impact force of the water flow, the water flow is continuously broken, the water flow is continuously absorbed by the impact force of the valve body 1, and the water flow is fully damaged due to the fact that the water flow is continuously damaged, and the impact force is long in the life is prolonged.

The utility model is to protect the structure of the product, the model of each element is not the content protected by the utility model, and the utility model is also known technology, and only the element capable of realizing the functions can be used as an option in the market. Therefore, parameters such as the type of the element will not be described in detail in the present utility model. The utility model is contributed to scientifically combining the elements together.

While the basic principles and main features of the present utility model and advantages thereof have been shown and described, it will be understood by those skilled in the art that the present utility model is not limited by the foregoing embodiments, which are described merely by way of illustration of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents. The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

Claims (9)

1. The silencing check valve comprises a valve body (1) and an opening and closing elastic rod (4) arranged on the inner wall of the valve body (1) in a sliding mode, wherein a sealing block (2) attached to the inner wall of the valve body (1) is arranged at the bottom end of the opening and closing elastic rod (4), and the silencing check valve is characterized in that an impact absorption pipe (5) is detachably and penetratingly arranged at the water outlet end of the valve body (1) through threaded connection, and when the valve body (1) is rapidly sealed by the sealing block (2), flowing water flow influenced by inertia is led into the impact absorption pipe (5), so that water flow impact is converted and absorbed by the impact absorption pipe (5).

2. The silencing check valve according to claim 1, wherein the impact absorbing pipe (5) comprises a pressing pipe (51) penetrating and detachably arranged at the water outlet end of the valve body (1) and a threaded layer (52) arranged on the outer wall of the top of the pressing pipe (51) and connected with the valve body (1) in a meshed mode, and a pressing block (54) is attached to the inner wall of the pressing pipe (51) in a sliding mode.

3. The silencing check valve as claimed in claim 2, wherein the inner wall of the bottom of the pressing pipe (51) is further provided with a compression elastic column (53), and the top end of the compression elastic column (53) abuts against the bottom surface of the pressing block (54).

4. The silencing check valve as claimed in claim 2, wherein the top end of the pressing pipe (51) is further provided with a sealing pipe (55) communicated with the pressing pipe (51) and the outer wall of which is in sealing fit with the valve body (1).

5. A sound-damping non-return valve in accordance with claim 4, wherein said closing tube (55) is provided with a plurality of closing rings (56) on its outer wall.

6. A sound damping check valve according to claim 2, wherein said lower pressure block (54) comprises a side block (31) which is fitted to the inner wall of the lower pressure pipe (51) and slides, and a water pressure sheet (34) provided in the side block (31).

7. The silencing check valve as claimed in claim 6, wherein the top surface of the hydraulic sheet (34) is further provided with a pressure plate (33) which is slidably connected with the side block (31), and a buffer cylinder (35) is arranged between the top surface of the hydraulic sheet (34) and the bottom surface of the pressure plate (33).

8. The muffler check valve as set forth in claim 6, wherein the surface of the side block (31) attached to the push-down pipe (51) is provided with a friction block (32) attached to the inner wall of the push-down pipe (51).

9. A sound damping check valve according to claim 8, wherein the friction block (32) is provided with a friction groove (36) on the surface which is attached to the pressing pipe (51).