A centrifugal pump with self-exhaust function

Abstract

The present invention relates to the technical field of centrifugal pumps, and mainly to a centrifugal pump with a self-exhaust function, comprising a centrifugal pump body, and also comprising a mounting plate, a strap connected to the centrifugal pump body being fixed on the mounting plate, a mounting frame being fixed on the mounting plate, a drive rod rotatably connected to the mounting plate being mounted on the mounting frame, a driving part for driving the drive rod to rotate being mounted on the mounting frame; and a lifting part mounted on the outer side of the drive rod, the lifting part being lifted and moved along the drive rod, a docking part being rotatably mounted on the bottom of the lifting part, a driving component connected to the drive rod being mounted on the outer side of the docking part, the mounting plate designed by the present invention can be mounted on the outer side of the centrifugal pump housing by means of a strap, and the exhaust bolts on the centrifugal pump can be docked with the docking part, the rotation of the drive rod and the mutual cooperation of the docking components can be realized, and then the lifting part is cooperated to realize the unscrewing of the bolts, and automatic exhaust is realized without manual operation by personnel.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with a self-exhaust function. Background Art

[0002] A centrifugal pump is a machine that uses the centrifugal force generated by the rotation of the impeller to transport liquid. When the centrifugal pump is started, the residual gas inside will occupy a certain space, causing the flow of liquid in the pump to be blocked, and the energy transfer efficiency between the liquid and the impeller, pump casing and other components to be reduced. The presence of gas will also cause uneven pressure distribution in the pump, resulting in cavitation and other adverse phenomena. Therefore, before starting the centrifugal pump, it is necessary to vent the inside of it.

[0003] Conventional centrifugal pumps are designed with an exhaust hole on their casing. A bolt is inserted into the thread of the exhaust hole. When exhausting, personnel can simply unscrew the bolt to exhaust. After exhausting, the bolt is tightened to seal it. However, some centrifugal pumps are installed in a small space, such as a water tower on the roof of a building, making it difficult for personnel to perform exhaust operations. Summary of the invention

[0004] The object of the present invention is to provide a centrifugal pump with a self-exhaust function to solve the problem mentioned in the above background technology that some centrifugal pumps have a small installation space and are difficult to exhaust manually.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a centrifugal pump with a self-exhaust function, comprising a centrifugal pump body and a mounting plate, a strap connected to the centrifugal pump body is fixed on the mounting plate, a mounting frame is fixed on the mounting plate, and a drive rod rotatably docked with the mounting plate is installed on the mounting frame, a driving part for driving the drive rod to rotate is installed on the mounting frame; and a lifting part installed on the outside of the drive rod, the lifting part moves up and down along the drive rod, a docking part connected to the exhaust bolt on the centrifugal pump body is rotatably installed on the bottom of the lifting part, and a driving component connected to the drive rod is installed on the outside of the docking part.

[0006] Preferably, the lifting part includes a lifting plate threadedly connected to the outer side of the driving rod, a sliding rod slidably inserted on the lifting plate and fixed to the mounting frame and the mounting plate, an insertion rod slidably inserted on the lifting plate, and a limiting plate is fixed at one end of the insertion rod, and a docking plate is fixed at the other end, the docking plate is slidably connected to the outer side of the driving rod, and a tension spring fixed to the docking plate and the lifting plate is fixed on the outer side of the insertion rod.

[0007] Preferably, the docking portion comprises a docking sleeve rotatably docked with the docking plate, a groove corresponding to the bolt is arranged inside the docking sleeve, and a tightening member is installed inside the docking sleeve.

[0008] Preferably, the tightening member comprises a tightening rod threadedly plugged into the docking sleeve, a rotating cap is fixed to one end of the tightening rod, and a stopper abutting against the outer side of the bolt is fixed to the other end.

[0009] Preferably, the driving assembly includes a transmission gear ring fixed on the outside of the docking tube and a driving gear ring rotatably connected to the docking plate, a planar end is provided on the outside of the driving rod, and a docking port for slidingly docking with the outside of the driving rod is provided inside the driving gear ring, the driving gear ring and the transmission gear ring are meshed with each other, an installation port is provided inside the driving gear ring, and a limiting portion that fits with the planar end is installed in the installation port.

[0010] Preferably, the limiting portion includes a limiting block that fits with the outer side of the planar end, a sliding opening is opened in the limiting block, and a docking block is slidably inserted in the sliding opening, an extrusion spring fixed to the inner wall of the mounting opening is fixed in the docking block, an inclined track groove is opened on the side wall of the mounting opening, and a plug column plugged into the track groove is fixed to the outer side of the limiting block.

[0011] Preferably, the driving part includes a driving motor fixed to the top of the mounting frame through a motor frame, a pinion is fixed to the output end of the driving motor through a coupling, and a large gear meshing with the pinion is fixed to the top of the driving rod.

[0012] Preferably, a notch is provided on the driving rod, and a sliding column is slidably inserted in the notch, one end of the sliding column is rotatably docked with the bottom of the lifting plate, and the other end is located below the driving gear ring and fixed with a supporting ring.

[0013] Preferably, a ball bearing is fixed to the bottom of the limiting block.

[0014] Preferably, a rubber block is fixed to the bottom of the mounting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The mounting plate designed in the present invention can be installed on the outside of the centrifugal pump housing by means of a strap, and can be docked with the exhaust bolts on the centrifugal pump with the help of a docking part. The rotation of the driving rod and the mutual cooperation of the docking components can drive the rotation of the bolts, and then cooperate with the lifting part to unscrew the bolts, thereby achieving automatic exhaust without manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the present invention after docking with a centrifugal pump;

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the connection between the exhaust bolt and the connection tube of the present invention;

[0020] Figure 4 It is a side view of the overall structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the connection between the exhaust bolt of the present invention and the tightening member in the connection tube;

[0022] Figure 6 This is a schematic diagram of the connection between the driving part and the driving rod of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the lifting part, the docking part and the driving assembly of the present invention;

[0024] Figure 8 It is a schematic diagram of the connection between the sliding column and the notch of the present invention;

[0025] Fig. 9 This is a schematic diagram of the structure of the internal limiting portion of the driving gear ring in a partial cross-section of the present invention;

[0026] Fig.10 It is a partial sectional rear side view of the driving gear ring of the present invention.

[0027] In the figure: 1. centrifugal pump body; 2. mounting plate; 3. strap; 4. mounting frame; 5. driving rod; 6. driving part; 7. lifting part; 8. docking part; 9. driving assembly; 10. lifting plate; 11. sliding rod; 12. inserting rod; 13. limiting plate; 14. docking plate; 15. tension spring; 16. docking tube; 17. tightening piece; 18. tightening rod; 19. stop block; 20. transmission gear ring; 21. driving gear ring; 22. flat end; 23. docking port; 24. mounting port; 25. limiting part; 26. limiting block; 27. sliding port; 28. docking block; 29. ​​extrusion spring; 30. track groove; 31. inserting column; 32. driving motor; 33. small gear; 34. large gear; 35. notch; 36. sliding column; 37. support ring; 38. ball bearing. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figure 1 - Figure 5A centrifugal pump with a self-exhaust function shown in the figure comprises a centrifugal pump body 1, and also comprises a mounting plate 2, a strap 3 connected to the centrifugal pump body 1 is fixed on the mounting plate 2, a mounting frame 4 is fixed on the mounting plate 2, a driving rod 5 rotatably connected to the mounting plate 2 is mounted on the mounting frame 4, a driving part 6 for driving the driving rod 5 to rotate is mounted on the mounting frame 4; and a lifting part 7 mounted on the outside of the driving rod 5, the lifting part 7 moves up and down along the driving rod 5, a docking part 8 connected to the exhaust bolt on the centrifugal pump body 1 is rotatably mounted on the bottom of the lifting part 7, and a driving component 9 connected to the driving rod 5 is mounted on the outside of the docking part 8;

[0030] In this solution, the designed strap 3 is sleeved on the outside of the centrifugal pump body 1, so that the mounting plate 2 is fastened to the centrifugal pump housing, and the docking portion 8 is sleeved on the outside of the exhaust bolt and sleeved with the exhaust bolt. Then, when the centrifugal pump is started, the driving portion 6 drives the driving rod 5 to rotate, so that the lifting portion 7 is raised and lowered. At the same time, with the help of the driving component 9, the docking portion 8 is driven to rotate accordingly, so as to drive the exhaust bolt to rotate and open, and finally the exhaust bolt is loosened and removed to achieve the exhaust operation.

[0031] It should be noted that the driving part 6 drives the driving rod 5 to rotate in reverse, thereby driving the exhaust bolt to move downward and tighten it into the exhaust hole;

[0032] In order to improve the stability of the connection between the mounting plate 2 and the outer side of the centrifugal pump body 1 , a rubber block is fixed at the bottom of the mounting plate 2 .

[0033] For further information, see Figure 4 and Figure 6 The driving part 6 includes a driving motor 32 fixed to the top of the mounting frame 4 through a motor frame, a pinion 33 is fixed to the output end of the driving motor 32 through a coupling, and a large gear 34 meshing with the pinion 33 is fixed to the top of the driving rod 5;

[0034] In this solution, the driving motor 32 rotates, driving the small gear 33 to rotate, thereby causing the large gear 34 meshing therewith to rotate, causing the driving rod 5 to perform corresponding rotation.

[0035] For further information, see Figure 3 and Figure 5 The docking portion 8 includes a docking sleeve 16 that is rotatably docked with the docking plate 14, and a groove corresponding to the bolt is provided inside the docking sleeve 16, and a tightening member 17 is installed in the docking sleeve 16;

[0036] The tightening member 17 includes a tightening rod 18 threadedly plugged into the docking sleeve 16 , a rotating cap is fixed to one end of the tightening rod 18 , and a stopper 19 abutting against the outer side of the bolt is fixed to the other end.

[0037] The docking part 8 realizes the principle of docking the exhaust bolts: first, the personnel docks the mounting plate 2 on the centrifugal pump casing, and then aligns the bottom of the docking tube 16 with the bolt and inserts it so that the bolt is inserted into the groove, and then tightens the rotating cap to rotate the tightening rod 18 and drive the abutment block 19 to abut against the outside of the bolt, thereby realizing the docking and fixing of the bolt, which is convenient for the subsequent rotation and lifting operations of the bolt.

[0038] For further information, see Figure 6 and Figure 7 The lifting part 7 includes a lifting plate 10 threadedly connected to the outer side of the driving rod 5, a sliding rod 11 fixed to the mounting frame 4 and the mounting plate 2 is slidably inserted on the lifting plate 10, and an insertion rod 12 is slidably inserted on the lifting plate 10, a limiting plate 13 is fixed at one end of the insertion rod 12, and a docking plate 14 is fixed at the other end, the docking plate 14 is slidably connected to the outer side of the driving rod 5, and a tension spring 15 fixed to the docking plate 14 and the lifting plate 10 is fixed on the outer side of the insertion rod 12;

[0039] Also, see Figure 6-Figure 9 The driving assembly 9 includes a transmission gear ring 20 fixed to the outside of the docking tube 16 and a driving gear ring 21 rotatably connected to the docking plate 14. A flat end 22 is provided on the outside of the driving rod 5. A docking port 23 for sliding docking with the outside of the driving rod 5 is provided in the driving gear ring 21. The driving gear ring 21 meshes with the transmission gear ring 20. An installation port 24 is provided in the driving gear ring 21. A limiting portion 25 that fits with the flat end 22 is installed in the installation port 24.

[0040] The principle of exhausting the centrifugal pump by tightening and lifting the exhaust bolt:

[0041] First, the personnel dock the docking part 8 with the bolt. Then, when exhausting, with the help of the rotation of the driving rod 5, the lifting plate 10 is moved up accordingly, and under the action of the limit plate 13 and the tension spring 15, the insertion rod 12 and the docking plate 14 are pulled up and down. At the same time, under the rotation of the driving rod 5, the driving gear ring 21 is rotated accordingly, driving the transmission gear ring 20 and the docking tube 16 meshing therewith to follow the rotation, so that the bolt in the docking tube 16 rotates accordingly. Under the pull of the tension spring 15, the docking plate 14 can follow the upward movement, thereby satisfying the rotation of the bolt to unscrew, the exhaust hole is opened, and exhaust is carried out.

[0042] The tension spring 15 can pull the docking plate 14 upward, so that the docking plate 14 and the lifting plate 10 are close to each other. At the same time, the insertion rod 12 and the limiting plate 13 can drive the docking plate 14 to move upward after the lifting plate 10 and the limiting plate 13 are against each other.

[0043] Example 2: Please refer to Figure 7-Figure 9This embodiment further explains the first embodiment, and the difference lies in that the shape of the driving gear ring 21 is improved, and the docking mode between the driving gear ring 21 and the driving rod 5 is optimized.

[0044] Specifically, the limiting portion 25 includes a limiting block 26 that fits with the outer side of the plane end 22, a sliding opening 27 is opened in the limiting block 26, a docking block 28 is slidably inserted in the sliding opening 27, an extrusion spring 29 fixed to the inner wall of the mounting opening 24 is fixed in the docking block 28, an inclined track groove 30 is opened on the side wall of the mounting opening 24, and a plug post 31 connected with the track groove 30 is fixed to the outer side of the limiting block 26.

[0045] In this solution, the designed extrusion spring 29 pushes the docking block 28 to push the limit block 26 outward and abut against the flat end 22 of the drive rod 5, so that the drive gear ring 21 fits against the outer side of the drive rod 5, so that the rotation of the drive rod 5 can drive the drive gear ring 21 to rotate, thereby realizing the rotation operation of the bolt. Since the bolts on the centrifugal pump may be difficult to twist at the beginning of rotation due to rust and other reasons, in order to avoid a stuck state between the drive gear ring 21 and the transmission gear ring 20, the drive motor 32 may be overloaded, thereby affecting its service life.

[0046] In some preferred embodiments, Figure 8 and Fig. 9 A notch 35 is provided on the driving rod 5, and a slide post 36 is slidably inserted in the notch 35. One end of the slide post 36 is rotatably connected to the bottom of the lifting plate 10, and the other end is located below the driving gear ring 21 and is fixed with a supporting ring 37. At the same time, a ball 38 is fixed to the bottom of the limit block 26;

[0047] In this embodiment, the slide column 36 moves accordingly with the lifting and lowering of the lifting plate 10, thereby driving the support ring 37 to move accordingly. When the support ring 37 moves upward, it contacts the ball 38 at the bottom of the limit block 26, so that the bottom of the limit block 26 is resisted and cannot retreat along the inclined track groove 30, so that the limit block 26 is limited, thereby improving the synchronization strength between the driving gear ring 21 and the driving rod 5.

[0048] First, connect the drive gear ring 21 with the drive rod 5. At this time, if the bolts are not tightly connected, the support ring 37 does not need to abut against the limit block 26. The limit block 26 and the plane end 22 can be tightly connected by squeezing the spring 29. When the bolts are tightly connected to a certain extent, at this time, the support ring 37 can be slowly moved upward to slowly limit the retreat distance of the limit block 26, thereby gradually improving the connection tightness between the limit block 26 and the plane end 22, and realizing the rotation of the over-tightened bolts.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump with self-exhaust function, comprising a centrifugal pump body (1), characterized in that: Also includes: A mounting plate (2), a strap (3) connected to the centrifugal pump body (1) being fixed on the mounting plate (2), a mounting frame (4) being fixed on the mounting plate (2), a drive rod (5) being mounted on the mounting frame (4) and being rotatably connected to the mounting plate (2), and a drive unit (6) for driving the drive rod (5) to rotate being mounted on the mounting frame (4); and, A lifting portion (7) is mounted on the outside of the driving rod (5), and the lifting portion (7) moves up and down along the driving rod (5). A docking portion (8) is rotatably mounted at the bottom of the lifting portion (7) and is connected to an exhaust bolt on a centrifugal pump body (1). A driving component (9) connected to the driving rod (5) is mounted on the outside of the docking portion (8).

2. A centrifugal pump with self-exhaust function according to claim 1, characterized in that: The lifting part (7) comprises a lifting plate (10) threadedly connected to the outer side of the driving rod (5); a sliding rod (11) fixed to the mounting frame (4) and the mounting plate (2) is slidably inserted on the lifting plate (10); an insertion rod (12) is slidably inserted on the lifting plate (10); a limiting plate (13) is fixed at one end of the insertion rod (12), and a docking plate (14) is fixed at the other end; the docking plate (14) is slidably connected to the outer side of the driving rod (5); and a tension spring (15) fixed to the docking plate (14) and the lifting plate (10) is fixed on the outer side of the insertion rod (12).

3. A centrifugal pump with self-exhaust function according to claim 2, characterized in that: The docking portion (8) comprises a docking tube (16) rotatably docked with the docking plate (14); a groove corresponding to the bolt is arranged inside the docking tube (16); and a tightening member (17) is installed inside the docking tube (16).

4. A centrifugal pump with self-exhaust function according to claim 3, characterized in that: The tightening member (17) comprises a tightening rod (18) threadedly plugged into the docking sleeve (16); a rotating cap is fixed to one end of the tightening rod (18) and a stopper (19) abutting against the outer side of the bolt is fixed to the other end.

5. A centrifugal pump with self-exhaust function according to claim 3, characterized in that: The driving assembly (9) comprises a transmission gear ring (20) fixed on the outside of the docking tube (16) and a driving gear ring (21) rotatably connected to the docking plate (14); a plane end (22) is provided on the outside of the driving rod (5), and a docking port (23) is provided in the driving gear ring (21) for sliding docking with the outside of the driving rod (5); the driving gear ring (21) and the transmission gear ring (20) are meshed with each other, and a mounting port (24) is provided in the driving gear ring (21), and a limiting portion (25) is installed in the mounting port (24) and is in contact with the plane end (22).

6. A centrifugal pump with self-exhaust function according to claim 5, characterized in that: The limiting portion (25) comprises a limiting block (26) which is fitted with the outer side of the plane end (22); a sliding opening (27) is provided in the limiting block (26); a docking block (28) is slidably inserted in the sliding opening (27); a compression spring (29) which is fixed to the inner wall of the mounting opening (24) is fixed in the docking block (28); an inclined track groove (30) is provided on the side wall of the mounting opening (24); and a plug post (31) which is plugged into the track groove (30) is fixed to the outer side of the limiting block (26).

7. A centrifugal pump with self-exhaust function according to claim 1, characterized in that: The driving part (6) comprises a driving motor (32) fixed to the top of the mounting frame (4) via a motor frame, a pinion (33) being fixed to the output end of the driving motor (32) via a coupling, and a large gear (34) meshing with the pinion (33) being fixed to the top of the driving rod (5).

8. A centrifugal pump with self-exhaust function according to claim 6, characterized in that: The driving rod (5) is provided with a notch (35), and a slide post (36) is slidably inserted in the notch (35), one end of the slide post (36) is rotatably connected to the bottom of the lifting plate (10), and the other end is located below the driving gear ring (21) and is fixed with a supporting ring (37).

9. A centrifugal pump with self-exhaust function according to claim 6, characterized in that: A ball (38) is fixed to the bottom of the limiting block (26).

10. A centrifugal pump with self-exhaust function according to claim 1, characterized in that: A rubber block is fixed to the bottom of the mounting plate (2).

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