CN210739468U

CN210739468U - Noise elimination check valve capable of preventing pipeline from bursting

Info

Publication number: CN210739468U
Application number: CN201921921046.1U
Authority: CN
Inventors: 卢子童
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-06-12
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a prevent noise elimination check valve that pipeline bursts, including swing rod, valve clack linking arm, valve clack and check valve body. The inner wall of the check valve body is connected with a swing rod. The two ends of the valve clack connecting arm are connected with the valve clack and the swing rod. The swing rods on the left side and the right side of the valve clack connecting arm are respectively sleeved with a left spring and a right spring, and the end parts of the left spring and the right spring adjacent to the valve clack connecting arm extend vertically downwards and then bend, extend and press on the valve clack connecting arm; a steel plate spring is connected on the connecting arm of the swing rod and the valve clack; when the valve clack is turned upwards around the swing rod to be opened, the left spring and the right spring jointly provide downward reaction force for the valve clack through pressing the valve clack connecting arm, and the opening of the valve clack is postponed or the closing of the valve clack is completed in advance by combining the downward reaction force of the steel plate spring. The product can eliminate the impact of the valve clack on the valve body, eliminate noise, avoid pipeline distortion, prevent pipeline vibration, prevent pipeline burst and save pipeline investment cost.

Description

Noise elimination check valve capable of preventing pipeline from bursting

Technical Field

The utility model relates to a fluid fields such as plumbing, petrochemical, gas, military project, more specifically relates to a prevent noise elimination check valve that pipeline bursts.

Background

The check valve, also called a check valve or a swing check valve, is a valve that depends on the power of fluid to push the valve clack 3 in the valve body open and the fluid flows out in one direction.

The structure of the existing check valve comprises a valve body 4, a swing rod 1, a connecting arm 2, a valve clack 3, a positioning ring 14 and a valve cover 5, and referring to fig. 1 and 2, a water inlet 6 is arranged at one axial end of the valve body 4 of the check valve, and a water outlet 7 is arranged at the other axial end of the valve body 4. The inner wall of the valve body 4 close to one side of the water inlet 6 is connected with a swing rod 1, and the swing rod 1 is positioned on a horizontal plane vertical to the water inlet direction of the water inlet 6. One end of the connecting arm 2 is connected with the valve clack 3, and the other end of the connecting arm 2 is movably connected with the axial middle part of the swing rod 1, which is shown in detail in figure 2. The flap 3 connected to the connecting arm 2 vertically covers, under its own weight, the water inlet valve opening 16, the check valve being connected, in normal use, to the booster pump and to the pipes: the booster pump is arranged on one side of the water inlet valve opening 6 of the check valve. The pipe network formed by pipelines is arranged at one side of the water outlet 7 of the check valve. When the booster pump works normally; the pressure of the pump opening is larger than the pressure of the pipe network, the valve clack 3 is pushed away by the fluid, and the check valve is conducted in one way. When the booster pump is closed, the pressure on one side of the pump opening is gradually reduced, and when the pressure on the pump opening is smaller than the pressure of the pipe network, the fluid on one side of the water outlet 7 of the check valve returns (also called backflow), and the valve clack 3 is closed by the fluid returning force, so that the check valve is stopped. Furthermore, practice has demonstrated that: the longer the pipe on the side of the check valve water outlet 7 is, the larger the pipe diameter is, and the higher the pipe pressure is, the larger the impact force is when the fluid returns. According to the test, the fluid return force at one side of the water outlet 7 of the check valve can increase the pressure in the pipeline by 10-20 times instantly because the liquid can not be compressed when impacting the valve clack 3. Therefore, the working mode of pushing the valve clack 3 to close the valve by means of the fluid return force on one side of the water outlet 7 of the check valve is dangerous, when the fluid return force impacts, the valve is loud (about 80-150 decibels), the pump port is broken severely, the pipeline vibrates, the pipeline deforms and shifts, and the pipeline explodes severely. Therefore, in designing and manufacturing a pump valve, the safety factor is often increased by increasing the mechanical strength of the pump valve, and in fact, it is a permanent practice to increase the thicknesses of the pump valve and the pipe at a time, and the fluid returning force can raise the pressure inside the pipe by 10 to 20 times instantly, and the consequences are more tragic once an accident occurs. This is a drawback of the conventional check valve. In conclusion, products which have simple structures, can relieve the impact of fluid return force and eliminate the potential safety hazard of pipelines are urgently needed in the market.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a noise elimination check valve that prevents the pipeline from bursting is provided.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

a silencing check valve for preventing a pipeline from bursting comprises a swing rod 1, a valve clack connecting arm 2, a valve clack 3, a check valve body 4 and a check valve cover 5; the check valve body 4 is approximately in a circular tube shape; a check valve water inlet 6 is arranged at one axial end of the check valve body 4, a check valve water outlet 7 is arranged at the other axial end of the check valve body 4, and an annular valve opening 16 is arranged at the axial middle part of the check valve body 4; a swing rod 1 is arranged on the inner wall of the check valve body 4 which faces to one side of the check valve water outlet 7 and is positioned above the annular valve opening 16; one end of the valve clack connecting arm 2 is connected with the valve clack 3, and the other end of the valve clack connecting arm 2 is movably connected with the rod body of the swing rod 1; the valve clack 3 connected with the valve clack connecting arm 2 vertically covers a round hole of the annular valve opening 16 under the action of self gravity, and the valve clack 3 rotates around the swing rod 1 to be opened under the thrust of fluid entering from the check valve water inlet 6;

a left spring 8 is sleeved on the swing rod 1 on the left side of the valve clack connecting arm 2, and a main shaft positioning screw 9 is arranged at the left end of the swing rod 1; the end of the left spring 8 adjacent to the check valve body 4 extends vertically and bears against the inner wall of the check valve body 4; the end part of the left spring 8 adjacent to the valve clack connecting arm 2 extends vertically downwards and then bends and extends to press on the valve clack connecting arm 2; a right spring 10 is sleeved on the swing rod 1 on the right side of the valve clack connecting arm 2; the end of the right spring 10 adjacent to the check valve body 4 extends vertically upward and abuts against the inner wall of the check valve body 4; the end part of the right spring 10 adjacent to the valve clack connecting arm 2 extends vertically downwards and then bends and extends to press on the valve clack connecting arm 2; the swing rod 1 and the valve clack connecting arm 2 are connected with a steel plate spring 11; when the valve clack 3 is turned upwards around the swing rod 1 to be opened, the left spring 8 and the right spring 10 jointly give downward reaction force to the valve clack 3 by pressing the valve clack connecting arm 2, and the opening of the valve clack 3 is postponed or the closing of the valve clack 3 is completed in advance by combining the downward reaction force of the steel plate spring 11.

Optionally, the cross section of the check valve cover 5 is arc-shaped; a rubber pad is arranged between the check valve body 4 and the check valve cover 5, and the rubber pad is positioned above the valve clack 3.

Optionally, the end of the valve flap connecting arm 2 adjacent to the swing rod 1 is U-shaped; a positioning ring 14 is arranged in the U-shaped end of the valve clack connecting arm 2, the positioning ring 14 is fixedly connected with the middle part of the body of the swing rod 1, and a steel plate spring 11 is fixedly connected with the swing rod 1 through the connecting positioning ring 14.

Compared with the prior art, the utility model has the following advantages:

the left spring 8, the right spring 10 and the steel plate spring 11 of the product clamp the valve clack 3 together under the elastic force action of the respective springs. When the valve clack 3 is turned upwards and opened around the swing rod 1, the left spring 8 and the right spring 10 jointly give downward reaction force to the valve clack 3 by pressing the valve clack connecting arm 2 in combination with the downward rebound force of the steel plate spring 11, and the reaction force is enhanced along with the increase of the opening angle of the valve clack 3. The reaction force weakens as the opening angle of the valve flap 3 decreases.

A large number of tests show that the pressure of the pump opening is equal to the pressure of the pipe network within 0.2 to 0.4 seconds after the pump is stopped. At this point, the fluid inside the pipe does not advance nor retreat (once this time is exceeded, the equilibrium is broken). The invention is characterized in that the valve flap 3 is pushed to cover the inner hole of the annular valve opening 16 by the force of the spring 8 and the spring 10 and the joint effort of the steel plate spring 11 within 0.2-0.4 second without the fluid in the pipeline going forward or retreating. Due to the change of the force pushing the valve flap 3, the return of the fluid on the side of the check valve outlet 7 is avoided, and the valve flap 3 is also prevented from impacting the annular valve opening 16.

In addition, when the pressure of the pump port is equal to that of the pipe network, movable fluid still exists in the pipe according to different installation forms and lengths of the pipe. Therefore, the check valve cover 5 and the rubber pad form an air chamber, liquid incompressibility is solved by utilizing the compressibility of gas, and pressure-rising residual waves generated when fluid in the pipeline flows are absorbed.

When the valve clack 3 is closed, the water outlet 7 of the check valve moves together with the pipe network fluid. The rubber pad in the product deforms towards the direction of the valve cover 5 of the check valve, and the impact on the valve clack 3 is reduced when water returns from one side of the water outlet 7 of the check valve, so that the impact of the valve clack 3 on the annular valve opening 16 is weakened, and when the check valve acts, noise and pipeline vibration can be effectively eliminated, and the pipeline is prevented from bursting. It is noted that when the Diameter (DN) of the check valve is within 100mm, the spring structure alone may be used without a rubber pad.

The silencing check valve for preventing the pipeline from bursting can effectively eliminate noise, shock and burst, release internal pressure fluctuation of the fluid pipeline, avoid the instant booster chance of the pipeline, improve the safety coefficient of the pipeline in a doubling way, and further save the investment cost of the pipeline.

Drawings

FIG. 1 is a schematic view of a prior art check valve;

FIG. 2 is a schematic view showing the connection relationship of the swing lever 1, the valve flap connecting arm 2 and the valve flap 3 in FIG. 1;

fig. 3 is a schematic structural view of a pipe burst prevention muffling check valve of the present invention;

fig. 4 is a schematic connection relationship diagram of fig. 2 with the addition of the left spring 8, the main shaft positioning screw 9, the right spring 10 and the leaf spring 11;

fig. 5 is a schematic perspective view of the left spring 8 in fig. 4;

fig. 6 is a perspective view of the right spring 10 in fig. 4.

Detailed Description

The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Referring to fig. 4, the silencing check valve for preventing the pipeline from bursting comprises a swing rod 1, a valve clack connecting arm 2, a valve clack 3, a check valve body 4 and a check valve cover 5. The check valve body 4 is approximately in a circular tube shape and is transversely arranged; open at the axial one end of check valve body 4 has check valve water inlet 6, open at the axial other end of check valve body 4 has check valve delivery port 7, is equipped with an annular valve mouth 16 at the axial middle part of check valve body 4, divide into two parts inside and outside with check valve body 4 through annular baffle 16: the inner cavity connected with the water inlet 6 of the check valve is communicated with the outer cavity connected with the water outlet 7 of the check valve through an inner hole on the annular valve opening 16. A swing rod 1 is arranged on the inner wall of the check valve body 4 which faces one side of the check valve water outlet 7 and is positioned above the annular partition plate.

The swing rod 1 is positioned on a horizontal plane vertical to the water inlet direction of the water inlet 6 of the check valve. One end of the valve clack connecting arm 2 is connected with the valve clack 3, and the other end of the valve clack connecting arm 2 is movably connected with the rod body of the swing rod 1. The valve clack 3 connected with the valve clack connecting arm 2 vertically covers the inner hole of the annular valve opening 16 under the action of self gravity to block the communication between the inner cavity and the outer cavity. When the valve clack 3 rotates around the swing rod 1 to open under the thrust of the fluid flowing from the water inlet 6 of the check valve, the inner cavity and the outer cavity are communicated. Further:

referring to fig. 3, a left spring 8 is sleeved on the swing rod 1 on the left side of the valve clack connecting arm 2, and 1 spindle positioning screw 9 is arranged at the left end of the swing rod 1 and fixed on the inner wall to increase stability. The end of the left spring 8 adjacent to the check valve body 4 extends vertically upwards and bears against the inner wall of the check valve body 4, see in detail fig. 4. The end part of the left spring 8 adjacent to the valve clack connecting arm 2 extends vertically downwards and then bends and extends to press the valve clack connecting arm 2, the end part of the left spring 8 extends vertically downwards for a short distance to prevent the deviation caused by the overlong extending distance, and detailed pictures in figures 3 and 5 are shown.

Referring to fig. 3, a right spring 10 is sleeved on the swing rod 1 on the right side of the valve clack connecting arm 2, the right spring 8 is symmetrically arranged, and 1 spindle positioning screw 9 is arranged at the right end of the swing rod 1 and fixed on the inner wall, so that the stability is improved. The end of the right spring 10 adjacent to the check valve body 4 extends vertically upwards and bears against the inner wall of the check valve body 4, see fig. 4. The end part of the right spring 10 adjacent to the valve clack connecting arm 2 extends vertically downwards and then bends and extends to press the valve clack connecting arm 2, and the end part of the left spring 8 extends vertically downwards for a short distance to prevent the deviation caused by the overlong extending distance, which is shown in detail in fig. 3 and 6.

Referring to fig. 3, a leaf spring 11 is connected to the swing rod 1 and the valve flap connecting arm 2, and specifically, the leaf spring 11 is fixedly connected to the swing rod 1 through a connecting positioning ring 14.

Referring to fig. 4, when the valve flap 3 is turned upwards around the swing rod 1 and opened, the left spring 8 and the right spring 10 are pressed on the valve flap connecting arm 2 due to the tail ends, so that the downward reaction force of the valve flap 3 can be given together, the downward rebound force of the steel plate spring 11 is combined, the elasticity is increased, the opening of the valve flap 3 is delayed or the closing of the valve flap 3 is advanced, and the effect is better than that of the case without the steel plate spring 11.

Referring to fig. 4, the cross-section of the check valve cover 5 is arc-shaped. A rubber pad is arranged between the check valve body 4 and the check valve cover 5, and the rubber pad is positioned above the valve clack 3.

Referring to fig. 3, the end of the flap connecting arm 2 adjacent to the swing lever 1 is U-shaped. A positioning ring 14 is arranged in the U-shaped end of the valve clack connecting arm 2, and the positioning ring 14 is fixedly connected with the middle part of the body of the swing rod 1.

In practical application, when fluid flows in a forward direction and flows in a return direction, the valve clack is opened and closed, in practice, the valve clack is opened and closed along with the change of flow speed, when the forward flow speed and the return acting force of the fluid resonate, low-frequency reciprocating motion is involved, and when the low-frequency reciprocating motion occurs, the

springs

8 and 10 are easy to fall off, so that the function failure is caused. Thus, bending the

springs

8 and 10 to 90 degrees catches the connecting arm 2, ensuring a perfect function.

The elasticity of the spring 8 and the spring 10 is too strong, so that the pipeline fluid pressure is easy to attenuate, and the steel plate spring 11 shares the elasticity coefficient, so that the service life is prolonged. In the practical process, leaf spring 11 has unexpected effect to eliminating low frequency resonance (sound), also is the bright point of the utility model.

Two fixing screws (namely, the driving positioning screws 9) are added on the swing rod 1 and the shaft seats on two sides of the swing rod, so that the normal functional action of the valve clack 3 is ensured.

The structure is particularly applied to a check valve with the model H44 for detection and comparison, and the H44 check valve with the original structure pushes the valve clack 3 to close the valve by relying on fluid return force, so that expansion force which is 10-20 times of the original working pressure is generated in the pipeline instantly, and noise is generated. The product uses the spring auxiliary force to push the valve clack 3, closes the valve, and absorbs the residual wave of the fluid pressure rise of the pipeline by using the compressibility of gas through an air chamber formed by a check valve cover 5 and a rubber cushion; the potential safety hazard of the pipeline is fundamentally eliminated; the valve noise is eliminated, the vibration and deformation of the pipeline are eliminated, and the burst and explosion of the pipeline are eliminated. The sizes of the pump valve and the pipeline structure can be based on the technical standard, the safety coefficient is executed according to the lower limit, and the invention and the application of the noise-eliminating anti-burst check valve can save the pipeline investment cost by 30 percent. Ensuring the pipeline to be long-term safe.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A noise elimination check valve for preventing a pipeline from bursting is characterized by comprising a swing rod (1), a valve clack connecting arm (2), a valve clack (3), a check valve body (4) and a check valve cover (5); the check valve body (4) is in an approximate round pipe shape; a check valve water inlet (6) is formed in one axial end of the check valve body (4), a check valve water outlet (7) is formed in the other axial end of the check valve body (4), and an annular valve opening (16) is formed in the middle of the check valve body (4) in the axial direction; a swing rod (1) is arranged on the inner wall of the check valve body (4) which faces to one side of the check valve water outlet (7) and is positioned above the annular valve opening (16); one end of the valve clack connecting arm (2) is connected with the valve clack (3), and the other end of the valve clack connecting arm (2) is movably connected with the rod body of the swing rod (1); the valve clack (3) connected with the valve clack connecting arm (2) vertically covers a round hole of the annular valve opening (16) under the action of self gravity, and the valve clack (3) rotates around the swing rod (1) to be opened under the thrust of fluid entering from the check valve water inlet (6);

a left spring (8) is sleeved on a swing rod (1) on the left side of the valve clack connecting arm (2), and a main shaft positioning screw (9) is arranged at the left end of the swing rod (1); the end part of the left spring (8) adjacent to the check valve body (4) extends vertically and is abutted against the inner wall of the check valve body (4); the end part of a left spring (8) adjacent to the valve clack connecting arm (2) extends vertically downwards, bends and extends to press on the valve clack connecting arm (2); a right spring (10) is sleeved on the swing rod (1) on the right side of the valve clack connecting arm (2); the end part of the right spring (10) adjacent to the check valve body (4) extends vertically upwards and is abutted against the inner wall of the check valve body (4); the end part of the spring (10) adjacent to the valve clack connecting arm (2) extends vertically downwards, bends and extends to press on the valve clack connecting arm (2); a steel plate spring (11) is connected to the swing rod (1) and the valve clack connecting arm (2); when the valve clack (3) is turned upwards around the swing rod (1) to be opened, the left spring (8) and the right spring (10) jointly give downward reaction force to the valve clack (3) by pressing the valve clack connecting arm (2), and the opening of the valve clack (3) is postponed or the closing of the valve clack (3) is completed in advance by combining the downward reaction force of the steel plate spring (11).

2. The muffling check valve for preventing the burst of a pipe according to claim 1, wherein the cross section of the check valve cover (5) is arc-shaped; a rubber pad is arranged between the check valve body (4) and the check valve cover (5), and the rubber pad is positioned above the valve clack (3).

3. The pipe burst resistant, silent check valve as claimed in claim 2, characterized in that the end of the flap connecting arm (2) adjacent to the swing lever (1) is U-shaped; a positioning ring (14) is arranged in the U-shaped end of the valve clack connecting arm (2), the positioning ring (14) is fixedly connected with the middle part of the rod body of the swing rod (1), and a steel plate spring (11) is fixedly connected with the swing rod (1) through the connecting positioning ring (14).