Leakage-proof device for centrifugal pump

Abstract

The leakage-proof device for the centrifugal pump comprises the centrifugal pump, the liquid inlet end of the centrifugal pump and the liquid outlet end of the centrifugal pump are both fixedly connected with fixing sleeves, one end of the inner side of each fixing sleeve is in contact with a positioning ring, one end of each positioning ring is fixedly connected with a connecting pipe, and one end of the inner side of each positioning ring is in contact with a guide shaft. Through the arranged fixing ring, guide blocks, limiting rods, clamping blocks, first springs, fixing sleeves and positioning rings, when the liquid inlet and outlet ends of the centrifugal pump are connected, the fixing ring is pushed in a reciprocating mode to control the clamping blocks to move in a reciprocating mode, and after the positioning rings are further inserted into the fixing sleeves to extrude rubber pads, the clamping blocks are clamped into the outer sides of the positioning rings; the liquid inlet end and the liquid outlet end of the centrifugal pump are connected, the phenomenon of looseness and leakage of the connecting position under the vibration effect can be prevented, the sealing effect of the device is guaranteed, the fixing ring is pushed again, then the positioning ring is pulled out of the fixing sleeve, and disassembly during follow-up maintenance can be conveniently and rapidly carried out.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and in particular to a leak-proof device for centrifugal pumps. Background Technology

[0002] Centrifugal pumps operate by using the centrifugal motion of water caused by the rotation of an impeller. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, causing the pump shaft to drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's discharge pipe through the flow channel of the volute casing. In existing centrifugal pumps, the connection between the inlet and outlet ends and the pipeline is mostly made using flanges and multiple bolts. Because centrifugal pumps generate significant vibration during operation, bolted connections are prone to loosening and leakage at the connection points under prolonged vibration, resulting in poor sealing and low disassembly efficiency during subsequent maintenance. Therefore, a leak-proof device for centrifugal pumps is proposed to address these issues. Utility Model Content

[0003] The technical problem to be solved by this utility model overcomes the existing defects and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A leak-proof device for a centrifugal pump includes a centrifugal pump. Both the inlet and outlet ends of the centrifugal pump are fixedly connected to a fixing sleeve. One end of the fixing sleeve contacts a positioning ring, and one end of the positioning ring is fixedly connected to a connecting pipe. Another end of the positioning ring contacts a guide shaft, which is fixedly connected to the fixing sleeve. The other end of the positioning ring contacts a rubber sealing gasket, and the guide shaft passes through the sealing gasket. The sealing gasket contacts both the fixing sleeve and the guide shaft. A locking block is engaged at the center of the outer side of the positioning ring, and the locking block contacts the fixing sleeve. One end of the locking block contacts a first spring. A limiting rod is fixedly connected to one end of the locking block, and the limiting rod passes through the fixing sleeve. The limiting rod contacts the fixing sleeve. A guide block is fixedly connected to one end of the limiting rod, and one end of the guide block contacts the fixing ring.

[0006] As a further improvement of this utility model, sealing rings are tightly contacted at both ends of the outer side of the fixing ring, and the sealing rings are in close contact with the fixing sleeve. The sealing rings are made of rubber.

[0007] As a further improvement of this utility model, the other end of the first spring contacts a threaded plug, and the threaded plug is screwed to the fixed sleeve.

[0008] As a further improvement of this utility model, the fixing ring contacts the limiting rod and the centrifugal pump, and the liquid inlet and liquid outlet of the centrifugal pump both pass through the fixing ring, and the part of the guide block that contacts the fixing ring is arranged in an arc shape.

[0009] As a further improvement of this utility model, one end of the sealing gasket contacts a compression ring, one end of the compression ring contacts a second spring, and the other end of the second spring contacts a fixing sleeve. The guide shaft passes through the second spring and the compression ring, and the compression ring contacts the guide shaft.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. A leak-proof device for centrifugal pumps, consisting of a fixed ring, guide block, limit rod, locking block, first spring, fixed sleeve, and positioning ring, works as follows: When connecting the inlet and outlet ends of the centrifugal pump, the fixed ring is first pushed to slide at the inlet and outlet ends, further sliding against the arc surface of the guide block. At this time, the limit rod continuously drives the locking block to compress the first spring. Then, the positioning ring, connected to the connecting pipe, is inserted into the fixed sleeve connecting the inlet and outlet ends of the centrifugal pump. The positioning ring further slides within the fixed sleeve under the guidance of the guide shaft, simultaneously compressing the rubber sealing gasket. When the positioning ring can no longer slide... When in motion, by resetting the fixing ring, the locking block is further reset and locked at the center of the outer side of the positioning ring. At this point, the device can be used after installation. By reciprocatingly pushing the fixing ring, the locking block is controlled to move back and forth. Then, by inserting the positioning ring into the fixing sleeve and squeezing the rubber pad, the locking block is locked into the outer side of the positioning ring, thereby connecting the inlet and outlet of the centrifugal pump. This can prevent the connection from loosening and leaking under vibration, ensuring the sealing effect of the device. Furthermore, by pushing the fixing ring again and then pulling the positioning ring out of the fixing sleeve, it is also convenient to quickly disassemble for subsequent maintenance.

[0012] 2. The centrifugal pump anti-leakage device, through the setting of a second spring, compression ring, guide shaft and sealing gasket, during the use of the device, the vibration generated by the device causes the compression ring on the outside of the guide shaft to reciprocate to compress the second spring and the rubber sealing gasket. At this time, the second spring and sealing gasket absorb and buffer the external force during the deformation process, thereby reducing the impact of external vibration on the sealing gasket, and thus reducing the impact of vibration on the sealing structure. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] Figure 1 This is a schematic diagram of the overall structure of the anti-leakage device for centrifugal pumps according to this utility model.

[0015] Figure 2 This is a cross-sectional view of the fixing sleeve of the anti-leakage device for centrifugal pumps according to this utility model.

[0016] In the diagram: 1. Centrifugal pump; 2. Fixed sleeve; 3. Positioning ring; 4. Connecting pipe; 5. Guide shaft; 6. Sealing gasket; 7. Sealing ring; 8. Clamping block; 9. First spring; 10. Threaded plug; 11. Limiting rod; 12. Guide block; 13. Fixed ring; 14. Second spring; 15. Compression ring. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1

[0019] like Figure 1-2 As shown, a leak-proof device for a centrifugal pump includes a centrifugal pump 1. A fixed sleeve 2 is fixedly connected to both the inlet and outlet ends of the centrifugal pump 1. A positioning ring 3 is contacted at one end of the inner side of the fixed sleeve 2. A connecting pipe 4 is fixedly connected to one end of the positioning ring 3. A guide shaft 5 is contacted at one end of the inner side of the positioning ring 3, and the guide shaft 5 is fixedly connected to the fixed sleeve 2. A rubber sealing gasket 6 is contacted at the other end of the positioning ring 3, and the guide shaft 5 passes through the sealing gasket 6. The sealing gasket 6 contacts the fixed sleeve 2 and the guide shaft 5. A locking block 8 is engaged at the center of the outer side of the positioning ring 3, and the locking block 8 contacts the fixed sleeve 2. A first spring 9 is contacted at one end of the inner side of the locking block 8. A limiting rod 11 is fixedly connected to one end of the outer side of the locking block 8, and the limiting rod 11 passes through the fixed sleeve 2. The limiting rod 11 contacts the fixed sleeve 2. A guide block 12 is fixedly connected to one end of the outer side of the limiting rod 11, and a fixed ring 13 is contacted at one end of the outer side of the guide block 12.

[0020] Example 2

[0021] like Figure 2As shown, in order to solve the problem of poor sealing effect at the liquid inlet and outlet of the device, sealing rings 7 are tightly contacted at both ends of the outer side of the fixing ring 3, and the sealing rings 7 are tightly contacted with the fixing sleeve 2. The sealing rings 7 are made of rubber. During the process of controlling the positioning ring 3 to squeeze the sealing ring 6, the positioning ring 3 simultaneously drives the rubber sealing ring 7 to make tight contact with the fixing sleeve 2, thereby improving the sealing effect at the liquid inlet and outlet of the device.

[0022] Example 3

[0023] like Figure 1-2 As shown, in order to solve the problem that the first spring 9 is inconvenient to replace when it is fatigued and deformed after long-term use, the other end of the first spring 9 is in contact with a threaded plug 10, and the threaded plug 10 is screwed to the fixed sleeve 2. When the first spring 9 is fatigued and deformed after long-term use, the threaded plug 10 can be rotated to disengage from the fixed sleeve 2, making it convenient to take out the fatigued and deformed first spring 9 for replacement.

[0024] Example 4

[0025] like Figure 2 As shown, in order to solve the problem of inconvenience in controlling the guide block 12 to push the limiting rod 11, the fixing ring 13 contacts the limiting rod 11 and the centrifugal pump 1, and the liquid inlet end and the liquid outlet end of the centrifugal pump 1 both pass through the fixing ring 13. The part of the guide block 12 that contacts the fixing ring 13 is arranged in an arc shape. By making the part of the guide block 12 that contacts the fixing ring 13 arc-shaped, it is convenient to control the guide block 12 to push the limiting rod 11 during the process of pushing the guide block 12 through the fixing ring 13.

[0026] Example 5

[0027] like Figure 2 As shown, in order to solve the problem that vibrations generated during the use of the device can easily cause a large impact on the sealing gasket 6, one end of the sealing gasket 6 is in contact with a compression ring 15, one end of the compression ring 15 is in contact with a second spring 14, and the other end of the second spring 14 is in contact with the fixing sleeve 2. The guide shaft 5 passes through the second spring 14 and the compression ring 15, and the compression ring 15 is in contact with the guide shaft 5. During the use of the device, the compression ring 15 reciprocates to compress the second spring 14 and the rubber sealing gasket 6 under the action of external vibration. At this time, the second spring 14 and the sealing gasket 6 will absorb and buffer the external force during the deformation process, thereby reducing the impact of external vibration on the sealing gasket 6.

[0028] In this embodiment, when connecting the inlet and outlet ends of the centrifugal pump 1, the fixing ring 13 is first pushed to slide outside the inlet and outlet ends of the centrifugal pump 1, further causing the fixing ring 13 to slide against the arc surface of the guide block 12. At this time, the limiting rod 11 will continuously drive the locking block 8 to compress the first spring 9. Then, when the fixing ring 13 can no longer be pushed, the positioning ring 3 connected by the connecting pipe 4 is inserted into the fixing sleeve 2 connected to the inlet and outlet ends of the centrifugal pump 1, further causing the positioning ring 3 to slide inside the fixing sleeve 2 under the guidance of the guide shaft 5. At this time, the positioning ring 3 will drive the rubber sealing ring 7 to make tight contact with the fixing sleeve 2 during the process of squeezing the rubber sealing gasket 6. When the positioning ring 3 can no longer slide, the fixing ring 13 is reset, further causing the locking block 8 to reset and lock at the center of the outer side of the positioning ring 3. At this time, the connection of the inlet and outlet ends of the device is just completed. The device can then be used. By inserting the positioning ring 3 into the fixing sleeve 2 and squeezing the rubber pad 6, the locking block 8 is engaged with the outside of the positioning ring 3, thus connecting the inlet and outlet of the centrifugal pump 1. This prevents the connection between the inlet and outlet from loosening and leaking under vibration. Furthermore, by pushing the fixing ring 13 again and pulling the positioning ring 3 out of the fixing sleeve 2, it is easy to disassemble for subsequent maintenance. During the use of the device, when vibration occurs, the squeezing ring 15 on the outside of the guide shaft 5 will reciprocate to compress the second spring 14 and the rubber sealing gasket 6. At this time, the second spring 14 and the sealing gasket 6 absorb and buffer the external force during deformation, which can reduce the impact of external vibration on the sealing gasket 6, thereby reducing the impact of vibration on the sealing structure.

[0029] The above are preferred embodiments of the present invention. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope thereof. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-proof device for a centrifugal pump, comprising a centrifugal pump (1), characterized in that: The inlet and outlet ends of the centrifugal pump (1) are both fixedly connected to a fixed sleeve (2). One end of the inner side of the fixed sleeve (2) contacts a positioning ring (3), and one end of the positioning ring (3) is fixedly connected to a connecting pipe (4). One end of the inner side of the positioning ring (3) contacts a guide shaft (5), and the guide shaft (5) is fixedly connected to the fixed sleeve (2). The other end of the positioning ring (3) contacts a rubber sealing gasket (6), and the guide shaft (5) passes through the sealing gasket (6). The sealing gasket (6) is connected to the fixed sleeve (2) and the guide shaft (4). The positioning ring (3) is in contact with the shaft (5). A locking block (8) is engaged at the center of the outer side of the positioning ring (3), and the locking block (8) is in contact with the fixing sleeve (2). One end of the inner side of the locking block (8) is in contact with the first spring (9). One end of the outer side of the locking block (8) is fixedly connected to a limiting rod (11), and the limiting rod (11) passes through the fixing sleeve (2). The limiting rod (11) is in contact with the fixing sleeve (2). One end of the outer side of the limiting rod (11) is fixedly connected to a guide block (12), and one end of the outer side of the guide block (12) is in contact with a fixing ring (13).

2. The anti-leakage device for centrifugal pumps according to claim 1, characterized in that: The positioning ring (3) has a sealing ring (7) in close contact at both ends on the outer side, and the sealing ring (7) is in close contact with the fixing sleeve (2). The sealing ring (7) is made of rubber.

3. The leak-proof device for centrifugal pumps according to claim 1, characterized in that: The other end of the first spring (9) is in contact with a threaded plug (10), and the threaded plug (10) is screwed to the fixed sleeve (2).

4. The leak-proof device for centrifugal pumps according to claim 1, characterized in that: The fixed ring (13) contacts the limiting rod (11) and the centrifugal pump (1), and the liquid inlet end and the liquid outlet end of the centrifugal pump (1) both pass through the fixed ring (13). The part of the guide block (12) that contacts the fixed ring (13) is arranged in an arc shape.

5. The leak-proof device for a centrifugal pump according to claim 1, characterized in that: One end of the sealing gasket (6) is in contact with the compression ring (15), one end of the compression ring (15) is in contact with the second spring (14), and the other end of the second spring (14) is in contact with the fixing sleeve (2). The guide shaft (5) passes through the second spring (14) and the compression ring (15), and the compression ring (15) is in contact with the guide shaft (5).

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