Automatic eliminator for air bag of water suction pipe of water pump

Abstract

The utility model provides a water pump water suction pipe air bag automatic eliminator which comprises a shell, a floater, an exhaust assembly, an exhaust pipe and a check valve, a first step ring and a second step ring are formed in the shell, and the check valve is installed between the first step ring and the second step ring in an up-down floating mode. The floater is accommodated in the shell in a manner of floating up and down and is positioned above the first stepped ring; the exhaust pipe is fixed at the top end of the shell; the exhaust assembly is installed in the shell and located between the exhaust pipe and the floater. The exhaust assembly is connected with the floater so that the floater can drive the exhaust assembly to open or close the exhaust pipe. The automatic eliminator for the air bag of the water suction pipe of the water pump not only can automatically exhaust air, but also can avoid the problem that the water pump is damaged because the water pump is started to generate negative pressure to suck air.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust valves, and particularly relates to an automatic eliminator for air bags in a water pump suction pipe. Background Art

[0002] Fire pumps adopt self-priming water absorption. However, at present, a large number of suction pipes have air bag phenomena during actual installation. If rework is required after such phenomena occur, it will cause great losses. The existing technical means is to directly install an automatic exhaust valve. However, since negative pressure will be generated in the suction pipe after the water pump starts, the float of the automatic exhaust valve will move downward due to the negative pressure, resulting in gas entering, and cavitation will also occur, thus damaging the water pump. Content of the Utility Model

[0003] In view of the above, the utility model provides an automatic eliminator for air bags in a water pump suction pipe, which can not only exhaust air automatically, but also avoid the problem that the water pump is damaged due to negative pressure suction of gas generated when the water pump starts.

[0004] The technical solution of the utility model:

[0005] The utility model provides an automatic eliminator for air bags in a water pump suction pipe, which comprises a shell, a float, an exhaust assembly, an exhaust pipe and a check valve. A first stepped ring and a second stepped ring are formed in the shell. The check valve is installed between the first stepped ring and the second stepped ring in a vertically movable manner; the float is vertically movably accommodated in the shell and is located above the first stepped ring; the exhaust pipe is fixed to the top end of the shell; the exhaust assembly is installed in the shell and is located between the exhaust pipe and the float; the exhaust assembly is connected to the float to drive the exhaust assembly to open or close the exhaust pipe through the float.

[0006] Further, the exhaust assembly comprises a connecting seat and a sealing plug. The connecting seat is connected to the float. The sealing plug is vertically slidably penetrated through the connecting seat. The sealing plug corresponds to the position of the exhaust pipe to open or close the exhaust pipe.

[0007] Further, the exhaust assembly comprises an elastic member, which is sleeved on the sealing plug and abuts between the sealing plug and the connecting seat.

[0008] Further, the sealing plug comprises a plug body, a top rod and a limiting member. The plug body is matched with the port of the exhaust pipe. One end of the top rod is fixed to the plug body and is vertically slidably penetrated through the guide hole of the connecting seat. The elastic member is sleeved on the top rod. The limiting member is fixed to the other end of the top rod to limit the rising stroke of the top rod.

[0009] Further, the shell comprises a cylinder body and an end cover installed at one end of the cylinder body. The other end of the cylinder body is the input end of gas and liquid.

[0010] Further, the first stepped ring and the second stepped ring are integrally formed on the inner wall of the cylinder body.

[0011] Furthermore, the exhaust pipe is fixed to the end cover or the cylinder body.

[0012] Furthermore, the check valve includes a valve block and a valve stem. One end of the valve stem is fixed to the valve block. An axial hole is provided at the center of the first stepped ring. The valve stem is slidably inserted into the axial hole. Communication holes are provided on the outer periphery of the axial hole on the first stepped ring. The valve block can be lifted to open or close the communication holes and the annular hole of the second stepped ring.

[0013] Furthermore, an exhaust cover is screwed to the protruding end of the exhaust pipe for opening or closing the exhaust pipe.

[0014] The automatic air bag eliminator for the water pump suction pipe of the present utility model realizes the dual functions of automatic exhaust and prevention of negative pressure suction, significantly improving the operation efficiency and safety of the water pump. Its beneficial effects are mainly reflected as follows:

[0015] I. Automatic exhaust function:

[0016] Through the ingenious combination of the float and the exhaust assembly, the present utility model realizes the automatic detection and elimination of the air bag. When an air bag is formed in the water pump suction pipe, the gas in the air bag will rise along the pipe. The gas enters the shell and accumulates above the float. As the gas in the shell increases, the pressure rises. When the gas pressure is greater than the system pressure, the gas will cause the water level in the shell to drop, and the float will drop with the water level. The float drives the exhaust assembly downward, separating the sealing plug from the exhaust pipe, thus opening the exhaust port to discharge the gas. The gas in the air bag is discharged smoothly, effectively avoiding the adverse effects of the air bag on the operation of the water pump. After the gas is exhausted, the water level rises, and the float also rises, driving the exhaust assembly upward to block the exhaust pipe, thereby closing the exhaust port to stop exhausting. This automatic exhaust mechanism requires no manual intervention, reduces the maintenance cost, improves the automation level of the equipment, and is especially suitable for water pump systems that need to operate continuously for a long time.

[0017] II. Protection against negative pressure suction:

[0018] The design of the check valve is another major highlight of the present utility model. It is installed between the first stepped ring and the second stepped ring in the shell in a floating manner. When the water pump stops working, the check valve automatically closes under the action of gravity or spring force, effectively preventing external gas from entering the water pump through the suction pipe.

[0019] This design fundamentally solves the problem of gas being sucked in due to negative pressure generated at the moment of starting the water pump, avoiding serious consequences such as pump body damage and efficiency decline that may be caused by gas entering the water pump, and extending the service life of the water pump.

[0020] III. Improvement of system stability and reliability:

[0021] With the dual guarantees of automatic exhaust and prevention of negative pressure inhalation, the utility model significantly improves the stability and reliability of the water pump system, reduces the failure shutdown time caused by airbag formation or negative pressure inhalation, and improves production efficiency and economic benefits.

[0022] The preferred embodiments of the utility model and their beneficial effects will be further described in detail in conjunction with the specific implementation manners. Brief Description of the Drawings

[0023] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the utility model, but should not constitute a limitation to the utility model. In the drawings:

[0024] Figure 1 It is a schematic cross-sectional structure view of the airbag automatic eliminator for the water pump suction pipe of the utility model.

[0025] Explanation of the reference numerals in the drawings: housing 1, float 2, exhaust assembly 3, exhaust pipe 4, check valve 5, first stepped ring 11, second stepped ring 12, connecting seat 31, sealing plug 32, elastic member 33, plug body 321, ejector rod 322, limiting member 323, cylinder 13, end cover 14, valve block 51, valve rod 52, communication hole 15, ring hole 16, exhaust cover 6. Specific Embodiment

[0026] The following will describe in detail the specific implementation manners of the utility model with reference to the drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the utility model and are not used to limit the utility model.

[0027] Please refer to Figure 1 , the utility model provides an airbag automatic eliminator for a water pump suction pipe, which includes a housing 1, a float 2, an exhaust assembly 3, an exhaust pipe 4 and a check valve 5. A first stepped ring 11 and a second stepped ring 12 are formed inside the housing 1, and the check valve 5 is installed between the first stepped ring 11 and the second stepped ring 12 in a vertically movable manner. The float 2 is vertically movably accommodated inside the housing 1 and is located above the first stepped ring 11. The exhaust pipe 4 is fixed to the top end of the housing 1. The exhaust assembly 3 is installed inside the housing 1 and is located between the exhaust pipe 4 and the float 2. The exhaust assembly 3 is connected to the float 2 to drive the exhaust assembly 3 to open or close the exhaust pipe 4 through the float 2. The airbag automatic eliminator for the water pump suction pipe provided by the utility model can exhaust automatically, and the check valve 5 can avoid the problem that the water pump is damaged due to negative pressure inhalation of gas generated when the water pump starts.

[0028] The airbag automatic eliminator for the water pump suction pipe of the utility model realizes the dual functions of automatic exhaust and prevention of negative pressure inhalation, and significantly improves the operation efficiency and safety of the water pump. Its beneficial effects are mainly reflected as follows:

[0029] I. Automatic exhaust function:

[0030] Through the ingenious combination of the float 2 and the exhaust assembly 3, the utility model realizes the automatic detection and elimination of air bags. When an air bag is formed in the water suction pipe of the water pump, the gas in the air bag will rise along the pipeline. The gas enters the housing 1 and accumulates above the float 2. As the gas in the housing 1 increases, the pressure rises. When the gas pressure is greater than the system pressure, the gas will cause the water level in the housing 1 to drop, and the float 2 will drop with the water level. The float 2 drives the exhaust assembly 3 downward, separating the sealing plug 32 from the exhaust pipe 4, thus opening the exhaust port to discharge the gas. The gas in the air bag is discharged smoothly, effectively avoiding the adverse effects of the air bag on the operation of the water pump. After the gas is exhausted, the water level rises, and the float 2 also rises, driving the exhaust assembly 3 upward to block the exhaust pipe 4, thereby closing the exhaust port and stopping the exhaust. This automatic exhaust mechanism requires no manual intervention, reduces the maintenance cost, and improves the automation level of the equipment, especially suitable for water pump systems that need to operate continuously for a long time.

[0031] II. Anti-negative pressure suction protection:

[0032] The design of the check valve 5 is another major highlight of the utility model. It can be installed to float up and down between the first stepped ring 11 and the second stepped ring 12 in the housing 1. When the water pump stops working, the check valve 5 automatically closes under the action of gravity or spring force, effectively preventing the outside gas from entering the water pump through the water suction pipe.

[0033] This design fundamentally solves the problem of gas being sucked in due to negative pressure generated at the moment of starting the water pump, avoiding serious consequences such as pump body damage and efficiency reduction caused by gas entering the water pump, and extending the service life of the water pump.

[0034] III. Improving system stability and reliability:

[0035] Through the dual guarantees of automatic exhaust and anti-negative pressure suction, the utility model significantly improves the stability and reliability of the water pump system, reduces the fault shutdown time caused by air bag formation or negative pressure suction, and improves the production efficiency and economic benefits.

[0036] In this embodiment, the exhaust assembly 3 includes a connecting seat 31, a sealing plug 32 and an elastic member 33. The connecting seat 31 is connected to the float 2. The sealing plug 32 can slide up and down through the connecting seat 31. The elastic member 33 is sleeved on the sealing plug 32 and abuts between the sealing plug 32 and the connecting seat 31. The sealing plug 32 corresponds to the position of the exhaust pipe 4 to open or close the exhaust pipe 4.

[0037] The sealing plug 32 includes a plug body 321, a push rod 322 and a limiting member 323. The plug body 321 is fitted with the port of the exhaust pipe 4. One end of the push rod 322 is fixed to the plug body 321 and is slidably inserted through the guide hole of the connecting seat 31 in a liftable manner. The elastic member 33 is sleeved on the push rod 322, and the limiting member 323 is fixed to the other end of the push rod 322 to limit the upward travel of the push rod 322.

[0038] When there is gas overflow in the system, the gas will climb upward along the pipeline. When the gas enters the housing 1 and accumulates above the float 2, as the gas in the housing 1 increases, the pressure rises. When the gas pressure is greater than the system pressure, the gas will cause the water level in the housing 1 to drop, and the float 2 will drop along with the water level. The float 2 drives the exhaust assembly 3 downward, separating the sealing plug 32 from the exhaust pipe 4, and the exhaust port can be opened. After the gas is exhausted, the water level rises, and the float 2 also rises. The exhaust assembly 3 moves upward, bringing the sealing plug 32 into contact with the exhaust pipe 4 for sealing, thus closing the exhaust port.

[0039] In this embodiment, the housing 1 includes a cylinder 13 and an end cover 14 installed at one end of the cylinder 13. The other end of the cylinder 13 is the input end of gas and liquid. The first stepped ring 11 and the second stepped ring 12 are integrally formed on the inner wall of the cylinder 13. The exhaust pipe 4 is fixed to the end cover 14; in addition, the exhaust pipe 4 can also be fixed to the cylinder 13.

[0040] In this embodiment, the float 2 is made of low-density PPR or composite material, and this material will not deform even when soaked in high-temperature water for a long time, and will not cause difficulties in the movement of the float 2.

[0041] In this embodiment, the check valve 5 includes a valve block 51 and a valve rod 52. One end of the valve rod 52 is fixed to the valve block 51. There is a shaft hole at the center of the first stepped ring 11, and the valve rod 52 is slidably inserted through the shaft hole. A communication hole 15 is provided on the outer periphery of the shaft hole on the first stepped ring 11, and the valve block 51 can be lifted to open or close the communication hole 15 and the ring hole 16 of the second stepped ring 12.

[0042] In this embodiment, an exhaust cap 6 is screwed to the protruding end of the exhaust pipe 4 for opening or closing the exhaust pipe 4.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying importance; the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the geometric directions towards or away from a specific component.

[0044] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the connection inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic airbag eliminator for a water pump suction pipe, characterized in that: The invention comprises a shell (1), a float (2), an exhaust assembly (3), an exhaust pipe (4) and a check valve (5). A first step ring (11) and a second step ring (12) are formed in the shell (1). The check valve (5) is installed between the first step ring (11) and the second step ring (12) in a manner that it can float up and down. The float (2) is accommodated in the shell (1) in a manner that it can float up and down and is located above the first step ring (11). The exhaust pipe (4) is fixed to the top of the shell (1). The exhaust assembly (3) is installed in the shell (1) and is located between the exhaust pipe (4) and the float (2). The exhaust assembly (3) is connected to the float (2) so that the float (2) drives the exhaust assembly (3) to open or close the exhaust pipe (4).

2. The automatic airbag eliminator for the water pump suction pipe according to claim 1, characterized in that: The exhaust assembly (3) comprises a connecting seat (31) and a sealing plug (32). The connecting seat (31) is connected to the float (2). The sealing plug (32) can be slid up and down and penetrate the connecting seat (31). The sealing plug (32) corresponds to the position of the exhaust pipe (4) so ​​as to open or close the exhaust pipe (4).

3. The automatic airbag eliminator for the water pump suction pipe according to claim 2, characterized in that: The exhaust assembly (3) comprises an elastic member (33), wherein the elastic member (33) is sleeved on the sealing plug (32) and abuts between the sealing plug (32) and the connecting seat (31).

4. The automatic airbag eliminator for the water pump suction pipe according to claim 3, characterized in that: The sealing plug (32) comprises a plug body (321), a push rod (322) and a stopper (323); the plug body (321) matches with the port of the exhaust pipe (4); one end of the push rod (322) is fixed to the plug body (321) and is slidably inserted into the guide hole of the connecting seat (31); the elastic member (33) is sleeved on the push rod (322); and the stopper (323) is fixed to the other end of the push rod (322) to limit the upward travel of the push rod (322).

5. The automatic airbag eliminator for the water pump suction pipe according to claim 1, characterized in that: The shell (1) comprises a cylinder (13) and an end cover (14) installed at one end of the cylinder (13); the other end of the cylinder (13) is an input end for gas and liquid.

6. The automatic airbag eliminator for the water pump suction pipe according to claim 5, characterized in that: The first step ring (11) and the second step ring (12) are integrally formed on the inner wall of the cylinder (13).

7. The automatic airbag eliminator for the water pump suction pipe according to claim 5, characterized in that: The exhaust pipe (4) is fixed on the end cover (14) or the cylinder (13).

8. The automatic airbag eliminator for the water pump suction pipe according to claim 1, characterized in that: The check valve (5) comprises a valve block (51) and a valve stem (52), one end of the valve stem (52) is fixed to the valve block (51), an axial hole is provided at the center of the first step ring (11), the valve stem (52) can be slidably inserted into the axial hole, a connecting hole (15) is provided on the outer periphery of the axial hole on the first step ring (11), and the valve block (51) can be raised or lowered to open or close the connecting hole (15) and the annular hole (16) of the second step ring (12).

9. The automatic airbag eliminator for the water pump suction pipe according to claim 1, characterized in that: An exhaust cover (6) is screwed onto the protruding end of the exhaust pipe (4) to open or close the exhaust pipe (4).

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