Corrosion-resistant pump valve cover

Abstract

The utility model discloses a corrosion-resistant pump valve cover, which relates to the technical field of pump valve covers and comprises a pump body, a pump cover is arranged at the top of the pump body, bolts are inserted into the top of the pump cover in an equidistant circumferential array manner, nuts are sleeved on the lower portions of the bolts in a threaded manner, the nuts abut against the bottom surface of the upper portion of the pump body, a collecting sleeve shell is sleeved outside the pump cover, and an annular guide rail is arranged on the inner wall of the collecting sleeve shell. The annular guide rail is slidably sleeved with a sliding seat, a pressure switch is arranged on one side of the sliding seat, and a pressure assembly used for controlling starting and stopping of the pressure switch is arranged on one side of the sensing end of the pressure switch. By means of the physical characteristic that the compression cotton piece absorbs water and expands, the volume of the compression cotton piece expands when leaked liquid is absorbed, the sliding piece slides along the interior of the sliding pipe and drives the connecting rod to move, then the ejector rod exerts pressure on the sensing end of the pressure switch, and then the effect of automatic power off during liquid leakage is achieved. The pump cover is effectively protected, the corrosion-resistant effect is achieved, the compressed cotton piece is low in price, and the use cost is extremely low.

Description

Technical Field

[0001] The utility model relates to the technical field of pump valve covers, in particular to a corrosion-resistant pump valve cover. Background Art

[0002] The pump valve cover is the end cover of the pump body. It is common in centrifugal pumps and vacuum pumps. It is an indispensable component of the pump body. Its main function is to seal the end of the pump body to prevent liquid leakage during pressurized transportation.

[0003] A Chinese utility model patent with a search announcement number of CN 215719814U discloses an acid-resistant and corrosion-resistant pump cover. In this solution, the establishment and separation of the connection relationship between the pump cover body and the preset pump body can be easily completed by pushing or pulling the end cover, which greatly improves the disassembly efficiency of the end cover; at the same time, the end cover includes a corrosion-resistant layer and a waterproof layer, has good waterproof, acid-resistant and corrosion-resistant effects, and the service life is also improved.

[0004] However, after the applicant's research and comparison with the existing technology, it was found that the existing solution has the following technical problems. First, the solution uses a corrosion-resistant layer and a waterproof layer to make the pump cover corrosion-resistant, but the pump cover in the traditional technology contains a coating, so the technical effect of this solution is not obvious. Secondly, the main reason for the rust of the pump cover is that the transported liquid contains corrosive components. With the increase of use time, the sealing ring inside the pump cover ages and shrinks. When the transported liquid leaks, the pump cover will be corroded. If the maintenance personnel cannot find it in time, more serious corrosion will occur, especially for the pump body installed in a hidden position. It is more difficult to detect leakage and corrosion. In this regard, we have proposed a corrosion-resistant pump valve cover. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a corrosion-resistant pump valve cover.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The corrosion-resistant pump valve cover comprises a pump body, a pump cover is arranged on the top of the pump body, bolts are inserted in a circular array at equal distances on the top of the pump cover, nuts are arranged on the threaded sleeves below the bolts, the nuts are all against the bottom surface of the upper part of the pump body, a collecting sleeve is arranged on the outer sleeve of the pump cover, an annular guide rail is arranged on the inner wall of the collecting sleeve, a sliding seat is arranged on the sliding sleeve of the annular guide rail, a pressure switch is arranged on one side of the sliding seat, and a pressure component for controlling the start and stop of the pressure switch is arranged on one side of the sensing end of the pressure switch.

[0008] Through the above technical solution: a pressure switch is used to control the start and stop of the pump body operation, and the liquid leaking from the gap between the pump body and the pump cover is collected by the collection sleeve.

[0009] Preferably, the pressure assembly includes a push rod laterally arranged on one side of the sensing end of the pressure switch, a connecting rod is provided at the end of the push rod away from the pressure switch, a sliding plate is provided at the bottom of the connecting rod, a sliding sleeve is provided on the outer peripheral surface of the sliding plate, the sliding tube is fixed to the bottom of the sliding seat, and the same compressed cotton piece is provided at the position between the opposite surfaces of the sliding plate and the inner wall of the sliding tube.

[0010] Through the above technical scheme: utilizing the physical property of compressed cotton sheet absorbing water and expanding, the volume expands when absorbing leaked liquid, and makes the slide slide along the inside of the slide tube while driving the connecting rod to move, so that the push rod applies pressure to the sensing end of the pressure switch, thereby achieving the effect of automatic power-off when leaking liquid, and effectively protecting the pump cover to achieve corrosion resistance.

[0011] Preferably, a sliding rod is inserted into the connecting rod for transverse sliding movement, the end of the sliding rod is fixed to the side wall of the sliding seat, and a top spring is sleeved on the outer peripheral surface of the sliding rod near the position between the sliding seat and the connecting rod.

[0012] Through the above technical solution: the movement of the connecting rod is guided by the cooperation between the top spring and the slide rod, and the compression cotton sheet is squeezed by the rebound force of the top spring itself, thereby preventing the displacement of the compression cotton sheet.

[0013] Furthermore, a bottom water absorption hole is provided at the end of the sliding tube, and a side water absorption hole is provided on the outer peripheral surface of the sliding tube.

[0014] Through the above technical solution: by utilizing the side water absorption holes and the bottom water absorption holes, no matter the pump body is placed horizontally or vertically, the compressed cotton sheet can collect the leaked liquid through the water absorption holes, thereby greatly improving the practicality and adaptability.

[0015] Furthermore, the same O-ring is embedded at the intersection of the pump body and the pump cover.

[0016] Through the above technical solution: the elastic compressibility of the O-ring is utilized to achieve a preliminary leak-proof effect.

[0017] Preferably, a same gasket is inserted at the intersection of the pump body and the pump cover, and the bolts all slide through the gasket.

[0018] Through the above technical solution: the gasket is used to seal the intersection of the pump body and the pump cover when the bolts are tightened, thereby further improving the sealing performance. The cooperation between the gasket and the O-ring greatly reduces the risk of leakage, thereby effectively preventing the corrosion of the pump cover.

[0019] The beneficial effects of the utility model are:

[0020] 1. Through the physical property of the compressed cotton sheet that absorbs water and expands, the volume expands when absorbing the leaked liquid, and the slide slides along the inside of the slide tube while driving the connecting rod to move, so that the push rod applies pressure to the sensing end of the pressure switch, thereby achieving the effect of automatic power off when leaking liquid, effectively protecting the pump cover to achieve corrosion resistance, and the compressed cotton sheet is low in price and has extremely low cost of use;

[0021] 2. The elastic compressibility of the O-ring is used to achieve a preliminary anti-leakage effect. Secondly, the gasket seals the intersection of the pump body and the pump cover when the bolts are tightened, further improving the sealing performance. The cooperation between the gasket and the O-ring greatly reduces the risk of leakage, thereby effectively preventing the corrosion of the pump cover.

[0022] 3. Through the side water absorption holes and bottom water absorption holes, no matter the pump body is placed horizontally or vertically, the compressed cotton sheet can collect the liquid leaking from the gap between the pump body and the pump cover through the water absorption holes, which greatly improves the practicality and adaptability. The compressed cotton sheet can be replaced repeatedly, so that the equipment can be reused and the use cost is greatly reduced.

[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the corrosion-resistant pump valve cover proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the exploded view structure of the corrosion-resistant pump valve cover proposed by the utility model;

[0026] Figure 3 The corrosion-resistant pump valve cover proposed by the utility model Figure 1 A schematic diagram of the enlarged local structure at A;

[0027] Figure 4 The utility model is a schematic diagram of the installation structure of the sliding tube, sliding plate and compressed cotton sheet of the corrosion-resistant pump valve cover.

[0028] In the figure: 1. pump body; 2. pump cover; 3. collecting casing; 4. bolts; 5. nuts; 6. gasket; 7. O-ring; 8. annular guide; 9. slide seat; 10. slide tube; 11. slide vane; 12. connecting rod; 13. push rod; 14. pressure switch; 15. slide rod; 16. push spring; 17. compression cotton sheet; 18. bottom water suction hole; 19. side water suction hole. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Example 1, reference Figures 1 to 4 A corrosion-resistant pump valve cover comprises a pump body 1, a pump cover 2 is arranged on the top of the pump body 1, bolts 4 are inserted in a circular array at equal distances on the top of the pump cover 2, nuts 5 are threadedly sleeved at the lower part of the bolts 4, and the nuts 5 are all against the bottom surface of the upper part of the pump body 1, a collecting sleeve 3 is sleeved on the outside of the pump cover 2, an annular guide rail 8 is arranged on the inner wall of the collecting sleeve 3, a sliding seat 9 is arranged on the sliding sleeve of the annular guide rail 8, a pressure switch 14 is arranged on one side of the sliding seat 9, a pressure component for controlling the start and stop of the pressure switch 14 is arranged on one side of the sensing end of the pressure switch 14, the pressure switch 14 is used to control the start and stop of the operation of the pump body 1, and the liquid leaked from the gap between the pump body 1 and the pump cover 2 is collected through the collecting sleeve 3.

[0031] For details, please refer to Figure 3 The pressure assembly includes a push rod 13 which is laterally arranged on one side of the sensing end of the pressure switch 14. A connecting rod 12 is arranged at the end of the push rod 13 away from the pressure switch 14. A sliding piece 11 is arranged at the bottom of the connecting rod 12. A sliding sleeve is arranged on the outer peripheral surface of the sliding piece 11. A sliding tube 10 is fixed to the bottom of the sliding seat 9. A same compressed cotton piece 17 is arranged between the sliding piece 11 and the opposite surface of the inner wall of the sliding tube 10. The compressed cotton piece 17 expands in volume when absorbing the leaked liquid by utilizing the physical property of the compressed cotton piece 17 that it absorbs water and expands. The sliding piece 11 slides along the inside of the sliding tube 10 and drives the connecting rod 12 to move, thereby causing the push rod 13 to apply pressure to the sensing end of the pressure switch 14, thereby achieving the effect of automatic power-off when leaking liquid, and effectively protecting the pump cover 2 to achieve corrosion resistance.

[0032] For details, please refer to Figure 3 A sliding rod 15 is inserted into the connecting rod 12 for horizontal sliding. The end of the sliding rod 15 is fixed to the side wall of the sliding seat 9. A top spring 16 is sleeved on the outer circumference of the sliding rod 15 near the position between the sliding seat 9 and the connecting rod 12. The top spring 16 and the sliding rod 15 are used to guide the movement of the connecting rod 12. At the same time, the resilience of the top spring 16 itself is used to squeeze the compressed cotton sheet 17, thereby preventing the compressed cotton sheet 17 from being displaced.

[0033] For details, please refer to Figure 4 A bottom water absorption hole 18 is opened at the end of the slide tube 10, and a side water absorption hole 19 is opened on the outer peripheral surface of the slide tube 10. By using the side water absorption hole 19 and the bottom water absorption hole 18, no matter the pump body 1 is placed horizontally or vertically, the compressed cotton piece 17 can collect the leaked liquid through the water absorption hole, which greatly improves the practicality and adaptability.

[0034] For details, please refer to Figure 2The same O-ring 7 is embedded at the intersection of the pump body 1 and the pump cover 2, and the elastic compressible performance of the O-ring 7 is utilized to achieve a preliminary leak-proof effect.

[0035] For details, please refer to Figure 2 A same gasket 6 is inserted at the intersection of the pump body 1 and the pump cover 2, and the bolts 4 are slid through the gasket 6. The gasket 6 is used to seal the intersection of the pump body 1 and the pump cover 2 when the bolts 4 are tightened, thereby further improving the sealing performance. The cooperation between the gasket 6 and the O-ring 7 greatly reduces the risk of leakage, thereby effectively preventing the pump cover 2 from corrosion.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A corrosion-resistant pump valve cover, comprising a pump body (1), characterized in that: The pump body (1) is provided with a pump cover (2) on the top, bolts (4) are inserted in a circular array at equal distances on the top of the pump cover (2), nuts (5) are threadedly sleeved on the lower part of the bolts (4), and the nuts (5) are all against the bottom surface of the upper part of the pump body (1), the pump cover (2) is sleeved with a collecting casing (3) on the outside, an annular guide rail (8) is provided on the inner wall of the collecting casing (3), a sliding seat (9) is slidably sleeved on the annular guide rail (8), a pressure switch (14) is provided on one side of the sliding seat (9), and a pressure component for controlling the start and stop of the pressure switch (14) is provided on one side of the sensing end of the pressure switch (14).

2. The corrosion-resistant pump valve cover according to claim 1, characterized in that: The pressure assembly comprises a push rod (13) which is transversely arranged on one side of the sensing end of the pressure switch (14); a connecting rod (12) is arranged at one end of the push rod (13) away from the pressure switch (14); a sliding plate (11) is arranged at the bottom of the connecting rod (12); a sliding tube (10) is slidingly sleeved on the outer peripheral surface of the sliding plate (11); the sliding tube (10) is fixed to the bottom of the sliding seat (9); and a same compressed cotton sheet (17) is arranged at a position between the opposing surfaces of the inner wall of the sliding plate (11) and the sliding tube (10).

3. The corrosion-resistant pump valve cover according to claim 2, characterized in that: The connecting rod (12) is laterally slidably inserted with a sliding rod (15), the end of the sliding rod (15) is fixed to the side wall of the sliding seat (9), and the outer peripheral surface of the sliding rod (15) is sleeved with a top spring (16) at a position between the sliding seat (9) and the connecting rod (12).

4. The corrosion-resistant pump valve cover according to claim 3, characterized in that: A bottom water absorption hole (18) is provided at the end of the slide tube (10), and a side water absorption hole (19) is provided on the outer peripheral surface of the slide tube (10).

5. The corrosion-resistant pump valve cover according to claim 4, characterized in that: The same O-type sealing ring (7) is embedded at the intersection of the pump body (1) and the pump cover (2).

6. The corrosion-resistant pump valve cover according to claim 5, characterized in that: A common gasket (6) is inserted at the intersection of the pump body (1) and the pump cover (2), and the bolts (4) all slide through the gasket (6).

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