Vertical pump exhaust structure with pressure relief function

Abstract

The vertical pump exhaust structure with the pressure relief function comprises a cover body, an exhaust pipe and an exhaust assembly, the exhaust pipe is arranged on the cover body, the exhaust assembly is arranged on the exhaust pipe, the exhaust assembly comprises a base fixedly installed on the exhaust pipe and an exhaust cover connected to the base in a threaded mode, a center through hole is formed in the base, and the center through hole is communicated with the exhaust cover. And a piston piece and a telescopic spring are matched in the central through hole. When exhaust is not needed, the exhaust cover is screwed down, the piston piece is pressed through the telescopic spring, and the central through hole is closed. When air needs to be exhausted, the air exhaust cover is unscrewed, and air is exhausted through the gap between the piston piece and the center through hole and the gap between the air exhaust cover and the base. If the pressure of liquid in the vertical pump is too large, the piston piece can be displaced, and pressure relief is conducted. The exhaust structure is simple in exhaust operation and has a pressure relief function, and the vertical pump does not need to be provided with a pressure relief assembly.

Description

Technical Field

[0001] This utility model relates to vertical pumps, and more specifically to the exhaust structure of vertical pumps. Background Technology

[0002] Vertical multistage pumps require an exhaust structure, such as the exhaust structure and vertical pump disclosed in patent document CN 215860926 U. The exhaust structure includes a cover and an exhaust pipe, the exhaust pipe being at least partially bent or folded, one end of the exhaust pipe communicating with the cover, and the other end extending away from the cover. An exhaust port is provided on the exhaust pipe, and an exhaust assembly is provided on the exhaust port. The exhaust assembly has two operating states: open and closed. The exhaust assembly includes an adjustment section for controlling the state switching of the exhaust assembly.

[0003] After the vertical pump finishes venting, it is filled with liquid. The pump outlet becomes blocked, the internal pressure increases, and pressure needs to be released. Utility Model Content

[0004] The technical problem solved by this utility model is: how to make the exhaust structure of a vertical pump also have a pressure relief function, without the need for a separate pressure relief component.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vertical pump exhaust structure with pressure relief function, including a cover, an exhaust pipe and an exhaust assembly. The exhaust pipe is disposed on the cover, and the exhaust assembly is disposed on the exhaust pipe. The exhaust assembly includes a base fixedly installed on the exhaust pipe and an exhaust cover screwed onto the base. The base has a central through hole, in which a piston and a telescopic spring are fitted. The piston and the central through hole are in clearance fit. The exhaust cover presses against the telescopic spring, causing the telescopic spring to press the piston, and the piston can close the central through hole.

[0006] According to the above technical solution, when venting is not required, the operator tightens the vent cap, which presses the piston against the spring. Under the spring's force, the piston seals the central through-hole, thus sealing the vent pipe. When venting is required, the operator loosens the vent cap. The air pressure inside the vent pipe overcomes the spring's force, driving the piston to move. The gas is then discharged through the gap between the piston and the central through-hole, and through the gap between the vent cap and the base.

[0007] When no venting is required, i.e., when the vent cover is tightened on the base, if the liquid pressure inside the vertical pump is too high, it can act on the piston to overcome the elastic force of the extension spring, causing the piston to move. The liquid is then discharged through the gap between the piston and the central through hole, and the gap between the vent cover and the base, thus relieving pressure.

[0008] The central through hole includes a small diameter section and a large diameter section. A first sealing ring is provided on the end face of the piston component, and the piston component can press the first sealing ring tightly on the step connecting the small diameter section and the large diameter section.

[0009] The piston and pressure auxiliary component are detachably connected, with the pressure auxiliary component located in the exhaust pipe. The operator can replace pressure auxiliary components of different areas to adjust the force applied to the piston during movement. With a constant air or hydraulic pressure in the exhaust pipe, a larger pressure auxiliary component area makes the piston easier to move; conversely, a smaller area makes the piston less likely to move.

[0010] The base is equipped with a limiting step, which is fixedly connected to the end face of the exhaust pipe. An external thread is provided on the connecting part of the base. When the end face of the exhaust cap, screwed onto the connecting part, abuts against the limiting step, there is still a gap between the end face of the connecting part and the inner end face of the exhaust cap. In this way, when the piston moves, the gas or liquid inside the exhaust pipe can be smoothly discharged.

[0011] The base is provided with a positioning part, which fits into the exhaust pipe, and a second sealing ring is provided between the positioning part and the exhaust pipe.

[0012] The connecting part is provided with a limiting annular groove, and the inner wall of the exhaust cover is provided with a limiting annular protrusion that can cooperate with the limiting annular groove. When the operator loosens the exhaust cover, and the exhaust cover is about to detach from the connecting part, the limiting annular protrusion engages with the limiting annular groove. In this way, the exhaust cover will not detach from the connecting part, thus avoiding safety accidents caused by excessive gas or liquid pressure in the exhaust pipe.

[0013] The exhaust structure of this utility model is simple to operate and has a pressure relief function, eliminating the need for a pressure relief component in vertical pumps. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 A schematic diagram of the exhaust structure of a vertical pump with pressure relief function;

[0016] Figure 2 A schematic diagram of the combined structure of exhaust pipe 20 and exhaust assembly 30;

[0017] Figure 3 for Figure 2 A schematic diagram of exhaust pipe 20 in the middle;

[0018] Figure 4 for Figure 2 Exploded view.

[0019] Explanation of symbols in the diagram:

[0020] 10. Cover;

[0021] 20. Exhaust pipe;

[0022] 30. Exhaust assembly;

[0023] 40. Base; 41. Central through hole; 42. Limiting step; 43. External thread; 44. Connecting part; 45. Positioning part; 46. Second sealing ring; 47. Limiting annular groove; 48. Limiting protrusion that can abut against pressure auxiliary component;

[0024] 50. Exhaust cover; 51. Limiting annular protrusion;

[0025] 60. Piston component; 61. First sealing ring; 62. Pressure auxiliary component;

[0026] 70. Extension spring. Detailed Implementation

[0027] like Figure 1 , Figure 2 A vertical pump exhaust structure with pressure relief function includes a cover 10, an exhaust pipe 20, and an exhaust assembly 30. The exhaust pipe is disposed on the cover, and the exhaust assembly is disposed on the exhaust pipe. The exhaust assembly includes a base 40 fixedly installed on the exhaust pipe and an exhaust cover 50 screwed onto the base. The base has a central through hole 41, in which a piston 60 and a telescopic spring 70 are fitted. The piston 60 and the central through hole are in clearance fit. The exhaust cover presses against the telescopic spring, causing the telescopic spring to press the piston 60, and the piston 60 can close the central through hole.

[0028] The central through hole 41 includes a small diameter section and a large diameter section. A first sealing ring 61 is provided on the end face of the piston 60. The piston can press the first sealing ring tightly on the step connecting the small diameter section and the large diameter section.

[0029] The piston 60 is detachably connected to the pressure auxiliary component 62, which is located in the exhaust pipe 20.

[0030] The base 40 is provided with a limiting step 42, which is fixedly connected to the end face of the exhaust pipe 20. The external thread 43 is provided on the connecting part 44 of the base. When the end face of the exhaust cover 50 screwed on the connecting part abuts against the limiting step, there is still a gap between the end face of the connecting part and the inner end face of the exhaust cover.

[0031] The base 40 is provided with a positioning part 45, which is fitted into the exhaust pipe 20, and a second sealing ring 46 is provided between the positioning part and the exhaust pipe.

[0032] like Figure 4 The connecting part 44 is provided with a limiting annular groove 47, and the inner side wall of the exhaust cover 50 is provided with a limiting annular protrusion 51 that can cooperate with the limiting annular groove.

[0033] like Figure 2When no venting is required, the operator tightens the vent cap 50, which presses the piston 60 against the telescopic spring 70. Under the elastic force of the telescopic spring, the piston closes the central through hole 41, and the vent pipe 20 is sealed.

[0034] like Figure 3 When venting is required, the operator loosens the vent cap 50. The air pressure inside the vent pipe 20 overcomes the elastic force of the telescopic spring 70, driving the piston 60 to move. The gas is then discharged through the gap between the piston 60 and the central through hole 41, and through the gap between the vent cap 50 and the base 40. When the operator loosens the vent cap 50, and the vent cap is about to detach from the connecting part 44 of the base 40, the limiting annular protrusion 51 of the vent cap 50 engages with the limiting annular groove 47 on the connecting part 44. In this way, the vent cap 50 will not detach from the connecting part, preventing excessive gas or liquid pressure inside the vent pipe 20 from causing a safety accident.

[0035] When no venting is required, i.e., when the vent cover 50 is tightened on the base 40, if the liquid pressure inside the vertical pump is too high, it can act on the piston 60, overcome the elastic force of the telescopic spring 70, and cause the piston to move. The liquid is then discharged through the gap between the piston 60 and the central through hole 41, and the gap between the vent cover 50 and the base 40, thus relieving pressure.

[0036] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A vertical pump exhaust structure with pressure relief function, comprising a cover (10), an exhaust pipe (20), and an exhaust assembly (30), wherein the exhaust pipe is disposed on the cover and the exhaust assembly is disposed on the exhaust pipe, characterized in that: The exhaust assembly includes a base (40) fixedly installed on an exhaust pipe and an exhaust cover (50) screwed onto the base. The base has a central through hole (41), in which a piston (60) and a telescopic spring (70) are fitted. The piston and the central through hole are fitted with a clearance. The exhaust cover presses against the telescopic spring, causing the telescopic spring to press the piston, and the piston can close the central through hole.

2. The vertical pump exhaust structure with pressure relief function as described in claim 1, characterized in that: The central through hole (41) includes a small diameter section and a large diameter section. A first sealing ring (61) is provided on the end face of the piston (60). The piston can press the first sealing ring tightly on the step connecting the small diameter section and the large diameter section.

3. The vertical pump exhaust structure with pressure relief function as described in claim 1, characterized in that: The piston (60) is detachably connected to the pressure auxiliary component (62), which is located in the exhaust pipe (20).

4. The vertical pump exhaust structure with pressure relief function as described in claim 1, characterized in that: The base (40) is provided with a limiting step (42), which is fixedly connected to the end face of the exhaust pipe (20). The external thread (43) is provided on the connecting part (44) of the base. When the end face of the exhaust cover (50) screwed on the connecting part abuts against the limiting step, there is still a gap between the end face of the connecting part and the inner end face of the exhaust cover.

5. The vertical pump exhaust structure with pressure relief function as described in claim 4, characterized in that: The base (40) is provided with a positioning part (45), which fits in the exhaust pipe (20), and a second sealing ring (46) is provided between the positioning part and the exhaust pipe.

6. The vertical pump exhaust structure with pressure relief function as described in claim 4, characterized in that: The connecting part (44) is provided with a limiting annular groove (47), and the inner wall of the exhaust cover (50) is provided with a limiting annular protrusion (51) that can cooperate with the limiting annular groove.

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