Adjustable waterproof hammer buffer air valve

Abstract

The utility model discloses an adjustable waterproof hammer buffer air valve which comprises a valve body, an air inlet hole plate and an upper valve cover, the upper valve cover is located at the top of the valve body, the bottom of the upper valve cover is fixedly connected with the top of the valve body, an upper cavity is formed in the upper valve cover, the top of the inner wall of the upper valve cover is fixedly connected with a spring support, and the top of the inner wall of the upper valve cover is fixedly connected with the spring support. A spring is fixedly connected to the bottom of the spring support, an adjustable exhaust hole plate is fixedly connected to the bottom of the spring, an air inlet hole plate is arranged at the bottom of the adjustable exhaust hole plate, bolts are arranged in the adjustable exhaust hole plate and the air inlet hole plate, and the adjustable exhaust hole plate is connected with the air inlet hole plate through the bolts. The combined type air valve has the advantages that gas accumulated in a pipeline can be timely discharged, too fast exhaust in the water column bridging process is avoided, the defects that in the later period of empty pipe water filling and normal operation of an existing combined type air valve, high-pressure gas discharging is slow, and too fast exhaust is achieved in the water column bridging process are overcome, and therefore the problem of pipeline pressure oscillation is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air valve technical field, especially relate to an adjustable waterproof hammer buffer air valve. BACKGROUND

[0002] Air valve is widely used in water supply pressure pipeline, ideal air valve performance includes the following three points: first point: when the pipeline system appears negative pressure, can timely air intake, supplement pipeline pressure, avoid pipeline negative pressure suction accident;

[0003] Second point: when the pipeline empty pipe fills water and normally operates, can exclude the gas in the pipeline, avoid airbag accumulation, reduce the water cross section or increase the local resistance of the pipeline. Requirement under any pressure during normal operation can open the buffer exhaust port and carry out buffer exhaust, can realize the continuous exhaust of gas and water;

[0004] Third point: when the pipeline system occurs pump stoppage or valve closing and other hydraulic transient process, air valve negative pressure air intake requires buffer exhaust, so that the airbag plays a buffering role in the water column closure process, avoids excessive water column closure pressure caused by too fast gas exhaust.

[0005] The existing technology has the following problems: the existing composite air valve can meet the first point air intake requirement, but cannot meet the second and third points simultaneously. The reason for not meeting the second point: in a high pressure environment, the existing air valve can only exhaust through a micro hole, if the exhaust port is enlarged, the pressure will lift the valve core or the floating ball, resulting in the closure of the exhaust port and the inability to normally exhaust. Usually, the size of the micro hole is only 2mm-5mm. During normal operation, due to the high pressure in the pipeline, i.e. the so-called "high pressure gas", the exhaust capacity of the micro hole is too small to timely remove the accumulated gas in the pipeline, thereby increasing the local resistance, or the gas movement with the water flow will produce pressure oscillation. The reason for not meeting the third point: the existing waterproof hammer buffer exhaust valve has a minimum switching pressure of 0.2m, however, due to the use of a large port in the initial exhaust stage, the exhaust speed is very fast, and the airbag pressure in the pipeline is difficult to rise, and in some working conditions, even 0.2m cannot be reached, which is equivalent to the entire exhaust process using a large port, and the small port is not switched, thus causing the water column closure pressure to be too large.

[0006] Therefore, there is an urgent need for an air valve with stable performance, which can timely exhaust even in a high pressure environment, and the buffer exhaust switching pressure can be arbitrarily adjusted according to engineering needs, or even only allow buffer exhaust. INVENTION CONTENTS

[0007] The utility model provides a kind of adjustable waterproof hammer buffer air valve for the problems of prior art, with the advantage of timely removing pipeline accumulated gas, also avoid water column closure process exhaust too fast, solve the existing composite air valve in empty pipe water filling later period and normal operation, remove "high pressure gas" slower and water column closure process exhaust too fast The disadvantage of problem, to avoid causing pipeline pressure oscillation.

[0008] The utility model discloses a kind of adjustable waterproof hammer buffer air valve, including valve body, air inlet hole plate and upper valve cover, the top of valve body is located, the bottom of upper valve cover is fixedly connected with the top of valve body, upper cavity is set in the inside of upper valve cover, the top of upper valve cover inner wall is fixedly connected with spring support, the bottom of spring support is fixedly connected with spring, the bottom of spring is fixedly connected with adjustable exhaust hole plate, the bottom of adjustable exhaust hole plate is provided with air inlet hole plate, bolt is set in adjustable exhaust hole plate and air inlet hole plate, adjustable exhaust hole plate is connected by bolt with air inlet hole plate, the inside of air inlet hole plate is set with exhaust port, the bottom of air inlet hole plate is fixedly connected with piston guide support, piston can be freely moved up and down in piston guide support, hollow pipe diameter is set in the inside of piston, and the top of hollow pipe diameter is communicated with exhaust port, the bottom of piston is fixedly connected with diaphragm, the bottom of diaphragm is fixedly connected with guard cylinder cover plate, the bottom of guard cylinder cover plate is provided with float ball, the top of float ball is penetrated guard cylinder cover plate and is sealed contact with the bottom of piston, diaphragm, piston and guard cylinder cover plate enclose control cavity, the surface of upper valve cover is set with exhaust hole, the inside of valve body is set with lower cavity.

[0009] As preferred in the utility model, the surface of the piston is sleeved with a piston guide support, the top of the piston guide support is fixedly connected with the bottom of the air inlet hole plate, and the inside of the piston guide support is set with a moving space for the piston.

[0010] As preferred in the utility model, the bottom of the guard cylinder cover plate is fixedly connected with a guard cylinder, the periphery of the guard cylinder is a grating type water inlet, the float ball is located in the inside of the guard cylinder, the bottom of the guard cylinder is fixedly connected with a lower bottom plate, the lower bottom plate is a grating hole plate, and the surface of the lower bottom plate is fixedly connected with the bottom of the inner wall of the valve body.

[0011] As preferred in the utility model, the number of the exhaust holes is multiple, and they are evenly distributed on the surface of the upper valve cover, and the upper cavity is communicated with the outside through the exhaust holes.

[0012] As preferred in the utility model, the surface of the air inlet hole plate is sleeved with an air inlet hole plate guide support for limiting the air inlet hole plate, and the surface of the air inlet hole plate guide support is fixedly connected with the inner wall of the valve body.

[0013] Compared with the prior art, the air valve has the advantages that:

[0014] The air valve is provided with a valve body, an upper valve cover, a buffer exhaust port, a spring, an adjustable exhaust hole plate, an air inlet hole plate, a piston, a diaphragm, a cylinder cover plate, a float ball and a cylinder, and the valve body is connected with a water conveying pipeline below.

[0015] When the pipeline has negative pressure, the air inlet hole plate, the adjustable exhaust hole plate, the piston and the float ball drop together, the air inlet is opened, and rapid air intake is realized.

[0016] 3、The air valve can realize high-speed air intake, timely pressure compensation, exhaust according to the required exhaust hole diameter under any high pressure, and continuous air-water exhaust, and can make the air bag play a buffering role in the water column closing process during the water power transient process, so that the water column closing pressure is not too large due to too fast exhaust. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a component name structure diagram provided by the embodiment of the application;

[0018] Figure 2 is an air outlet schematic view of the valve body buffer exhaust port provided by the embodiment of the application;

[0019] Figure 3is a valve port closing schematic diagram provided by the embodiment of the present application;

[0020] Figure 4 is an air intake schematic diagram of the air inlet of the valve body provided by the embodiment of the present application;

[0021] Figure 5 is an adjustable exhaust hole plate schematic diagram provided by the embodiment of the present application;

[0022] Figure 6 is an air inlet hole plate schematic diagram provided by the embodiment of the present application.

[0023] In the figure: 1, valve body; 2, spring support; 3, floating ball; 4, guard cylinder; 5, guard cylinder cover plate; 6, diaphragm; 7, piston; 8, air inlet hole plate; 9, adjustable exhaust hole plate; 10, exhaust port; 11, spring; 12, lower cavity; 13, upper valve cover; 14, upper cavity; 15, piston guide support; 16, air inlet hole plate guide support; 17, hollow pipe diameter; 18, lower bottom plate; 19, bolt; 20, control cavity. DETAILED DESCRIPTION

[0024] In order to further understand the invention content, characteristics and effects of the present application, the following examples are given, and the detailed description is as follows in conjunction with the drawings.

[0025] The structure of the present application will be described in detail below in conjunction with the drawings.

[0026] As Figures 1 to 6The utility model discloses an adjustable waterproof hammer buffer air valve, including valve body 1, air inlet hole plate 8 and upper valve cover 13, upper valve cover 13 is located at the top of valve body 1, and the bottom of upper valve cover 13 is fixedly connected with the top of valve body 1, and the inside of upper valve cover 13 is equipped with upper chamber 14, and the top of upper valve cover 13 inner wall is fixedly connected with spring 11 support 2, and the bottom of spring 11 support 2 is fixedly connected with spring 11, and the bottom of spring 11 is fixedly connected with adjustable exhaust hole plate 9, and the bottom of adjustable exhaust hole plate 9 is provided with air inlet hole plate 8, and the inside of adjustable exhaust hole plate 9 and air inlet hole plate 8 is provided with bolt 19, and adjustable exhaust hole plate 9 is connected with air inlet hole plate 8 through bolt 19, and the relative position can be changed by rotating adjustable exhaust hole plate 9, so that the size of exhaust hole diameter can be changed, and the size of exhaust hole diameter can be adjusted according to demand, and the inside of air inlet hole plate 8 is equipped with exhaust port 10, and the bottom of air inlet hole plate 8 is fixedly connected with piston guide support 15, and piston 7 can move freely up and down in piston guide support 15, and the inside of piston 7 is equipped with hollow pipe diameter 17, and the top of hollow pipe diameter 17 is communicated with exhaust port 10, and the bottom of piston 7 is fixedly connected with diaphragm 6, and the bottom of diaphragm 6 is fixedly connected with cylinder cover plate 5, and the bottom of cylinder cover plate 5 is provided with float ball 3, and the top of float ball 3 penetrates cylinder cover plate 5 and is in sealed contact with the bottom of piston 7, and diaphragm 6, piston 7 and cylinder cover plate 5 enclose control chamber 20, and the surface of upper valve cover 13 is equipped with exhaust hole, and the inside of valve body 1 is equipped with lower chamber 12.

[0027] By adjusting the gravity of air inlet hole plate 8 and the elastic force of spring 11, the switching pressure of the adjustable exhaust hole plate 9 and the air inlet hole plate 8 is adjusted, when the switching pressure is not zero and the pipeline airbag pressure is higher than the switching pressure, the air inlet hole plate 8 is lifted under the action of pressure difference, and the large exhaust port 10 (air inlet) is closed, when the switching pressure is set to zero, after the air valve completes air intake, the air inlet hole plate 8 will reset immediately under the tension of the spring 11 to close the large exhaust port 10 (air inlet), and only allows buffer exhaust, the adjustable exhaust hole plate 9 and the air inlet hole plate 8 are connected through the bolt 19, the relative position can be changed by rotating, so that the size of exhaust hole diameter can be changed, and the size of exhaust hole diameter can be adjusted according to demand, the buffer exhaust port 10 can be opened for exhaust under any high pressure, the control chamber 20 surrounded by the diaphragm 6, the piston 7 and the cylinder cover plate 5, when the pipeline has gas passing through the air valve lower chamber 12, the float ball 3 falls, the hollow pipe diameter 17 makes the control chamber 20 communicate with the atmosphere, the control chamber 20 becomes atmospheric pressure, and the control chamber 20 outside is the high pressure gas in the pipeline (greater than the gas pressure in the control chamber 20), the diaphragm 6 is compressed and drives the piston 7 to move down under the action of the pressure difference between inside and outside, the buffer exhaust port 10 is opened, and the buffer exhaust is carried out.

[0028] The surface of the piston 7 is sleeved with a piston guide support 15, the top of the piston guide support 15 is fixedly connected with the bottom of the air inlet hole plate 8, and the inside of the piston guide support 15 is provided with a moving space for the piston 7, so that the piston 7 can be limited, and the float ball 3 and the piston 7 move upward together after exhaust, so that the exhaust hole is closed well.

[0029] The bottom of the protection cylinder cover plate 5 is fixedly connected with the protection cylinder 4, the periphery of the protection cylinder 4 is a grating type water inlet, the float ball 3 is located in the inside of the protection cylinder 4, the bottom of the protection cylinder 4 is fixedly connected with a lower bottom plate 18, the lower bottom plate 18 is a grating hole plate, the surface of the lower bottom plate 18 is fixedly connected with the bottom of the inner wall of the valve body 1, the protection cylinder 4 fixedly connected with the bottom of the protection cylinder cover plate 5 and the grating type water inlet around the protection cylinder 4 can effectively control the speed and direction of water flow into the protection cylinder 4, avoid the water flow being too violent to cause the float ball 3 to be unstable, the float ball 3 is located in the inside of the protection cylinder 4 and can float up and down with the change of water level, so as to control the opening and closing of the exhaust port 10, the lower bottom plate 18 fixedly connected with the bottom of the protection cylinder 4 is designed as a grating hole plate, which can not only enhance the stability of the structure, but also prevent sundries from entering the inside of the protection cylinder 4, so as to ensure the normal work of the float ball 3, and the fixed connection of the surface of the lower bottom plate 18 with the bottom of the inner wall of the valve body 1 further ensures the stability and sealing performance of the whole structure, and improves the service life and safety of the valve.

[0030] The number of exhaust hole ports is multiple, and the exhaust hole ports are uniformly distributed on the surface of the upper valve cover 13, and the upper cavity 14 is communicated with the outside through the exhaust hole ports, so that the upper cavity 14 can be conveniently communicated with the outside air through the exhaust hole ports.

[0031] The surface of the air inlet hole plate 8 is sleeved with an air inlet hole plate guide support 16 for limiting the air inlet hole plate 8, and the surface of the air inlet hole plate guide support 16 is fixedly connected with the inner wall of the valve body 1, so that the air inlet hole plate 8 can be limited through the air inlet hole plate guide support 16, and the air inlet hole plate 8 is closed well after air inlet.

[0032] The working principle of the utility model is as follows:

[0033] Closed state: in use, the valve body 1 is connected with a water conveying pipeline, when the water conveying pipeline normally operates, water flows into the lower cavity 12 and submerges the outside of the float ball 3 and the piston 7, the lower cavity 12 is filled with water when the pipeline has no air, the float ball 3 is lifted by buoyancy and seals the lower end port of the hollow pipe diameter 17, and the valve is closed.

[0034] Exhaust state: when there is air bag in the pipeline, the ball 3 due to the valve body 1 lower cavity 12 water quantity decreases, the buoyancy decreases and falls, the contact sealing surface of the ball 3 and the piston 7 opens, the hollow pipe diameter 17 lower port opens, the space below the diaphragm 6 is connected with the atmosphere, maintains atmospheric pressure, the piston 7 upper and lower surface pressure is not equal, so that the piston 7 falls, and the air inlet hole plate 8 is separated, the buffer exhaust port 10 opens, the gas in the pipeline enters the upper cavity 14 through the buffer exhaust port 10, and then is discharged into the atmosphere through the peripheral exhaust hole, the air inlet hole plate 8 cannot fall due to being lifted by the high pressure gas in the air valve, so the air inlet is closed.

[0035] Intake state: when the pipeline pressure is lower than the atmospheric pressure, the linkage components (including the air inlet hole plate 8, the adjustable exhaust hole plate 9, the spring 11), the ball 3 and the piston 7 move downward, the air inlet hole plate 8 is separated from the upper valve cover 13, the air inlet is opened, and the external air is supplemented into the pipeline to avoid the negative pressure caused by the water column being pulled off.

[0036] In summary: the adjustable water hammer buffer air valve, by setting the valve body 1, the spring 11 support 2, the ball 3, the casing 4, the casing cover plate 5, the diaphragm 6, the piston 7, the air inlet hole plate 8, the adjustable exhaust hole plate 9, the buffer exhaust port 10, the spring 11, the lower cavity 12, the upper valve cover 13, the upper cavity 14, the piston guide support 15, the air inlet hole plate guide support 16, the hollow pipe diameter 17, the lower bottom plate 18 and the bolt 19 are used in cooperation, the valve body 1 is connected with the water conveying pipeline, when the water conveying pipeline is normally operated, the water flow enters the lower cavity 12, immerses the outside of the ball 3 and the piston 7, and the lower cavity 12 is filled with water when there is no gas in the pipeline, the ball 3 is lifted by the buoyancy, the lower port of the hollow pipe diameter 17 is sealed, and the valve is closed. When the pipeline has negative pressure, when the pipeline pressure is lower than the atmospheric pressure, the linkage components (including the air inlet hole plate 8, the adjustable exhaust hole plate 9, the spring 11), the ball 3 and the piston 7 move downward, the air inlet hole plate 8 is separated from the upper valve cover 13, the air inlet is opened, and the external air is supplemented into the pipeline to avoid the negative pressure caused by the water column being pulled off. As long as there is gas in the pipeline, no matter how high the gas pressure is, it can be discharged in time, and the buffer exhaust port 10 can be set according to the need, realizing high pressure buffer exhaust. The air valve can realize high speed air intake and timely pressure compensation. The exhaust effect is good, can realize continuous exhaust of gas and water, and can set the switching pressure of the large exhaust port 10 (the same as the air inlet) and the small exhaust port 10 (the buffer exhaust port 10) according to the need, the low pressure gas in the pipeline filling stage can be discharged at high speed through the large exhaust port 10, and the high pressure gas generated in the pipeline running stage can be discharged at low speed through the small exhaust port 10, so that the air bag plays a buffering role in the water column closing process, avoiding the problem of pipeline pressure oscillation caused by too fast exhaust of high pressure gas.

[0037] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0038] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An adjustable water hammer arrestor cushion air valve, characterized by: Including valve body (1), air inlet hole plate (8) and upper valve cover (13), the upper valve cover (13) is located at the top of valve body (1), the bottom of the upper valve cover (13) is fixedly connected with the top of valve body (1), the inside of the upper valve cover (13) is provided with upper cavity (14), the inside of the air inlet hole plate (8) is provided with exhaust port (10), the bottom of the air inlet hole plate (8) is fixedly connected with piston guide bracket (15), the piston (7) can be freely moved up and down in the piston guide bracket (15), the inside of the piston (7) is provided with hollow pipe diameter (17), and the top of the hollow pipe diameter (17) is communicated with the exhaust port (10), the bottom of the piston (7) is fixedly connected with diaphragm (6), the bottom of the diaphragm (6) is fixedly connected with cylinder cover plate (5), the bottom of the cylinder cover plate (5) is provided with floating ball (3), the top of the floating ball (3) penetrates the cylinder cover plate (5) and is in sealing contact with the bottom of the piston (7), the diaphragm (6), the piston (7) and the cylinder cover plate (5) form control cavity (20), the surface of the upper valve cover (13) is provided with exhaust hole, the inside of the valve body (1) is provided with lower cavity (12).

2. An adjustable water hammer arrestor air buffer valve as defined in claim 1 wherein: The top of the inner wall of the upper valve cover (13) is fixedly connected with spring bracket (2), the bottom of the spring bracket (2) is fixedly connected with spring (11), the bottom of the spring (11) is fixedly connected with adjustable exhaust hole plate (9), the bottom of the adjustable exhaust hole plate (9) is provided with air inlet hole plate (8), the adjustable exhaust hole plate (9) and the air inlet hole plate (8) are provided with bolt (19), and the adjustable exhaust hole plate (9) and the air inlet hole plate (8) are connected through the bolt (19).

3. An adjustable water hammer arrestor air buffer valve as defined in claim 1 wherein: The bottom of the cylinder cover plate (5) is fixedly connected with cylinder (4), the periphery of the cylinder (4) is a grating type water inlet, the floating ball (3) is located in the inside of the cylinder (4), the bottom of the cylinder (4) is fixedly connected with lower bottom plate (18), the lower bottom plate (18) is a grating hole plate, and the surface of the lower bottom plate (18) is fixedly connected with the bottom of the inner wall of the valve body (1).

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