Pump cover with locking structure for centrifugal pump

Abstract

The utility model discloses a pump cover with a locking structure for a centrifugal pump, which comprises a pump body, one side of the pump body is fixedly connected with a plurality of threaded rods, the outer wall of each threaded rod is provided with a plane groove, one side of the pump body is fixedly connected with an inserting pipe, the outer wall of the circumference of the inserting pipe is provided with a clamping ring, one side of the pump body is provided with a pump cover body, and the pump cover body is provided with a locking structure. A groove is formed in one side of the pump cover body, one end of the inserting pipe is connected with the groove in an inserting mode, and a butt joint ring is fixedly connected to one side of the pump cover body and arranged on the outer side of the inserting pipe in a sleeving mode. The sliding shaft is driven to move in the process that the pump cover body is pushed inwards, so that one end of the sliding shaft moves along the plane groove of the threaded rod, the sliding shaft moves under extrusion of the threaded rod, when the pump cover body covers a pump body, the other end of the sliding shaft is connected with the clamping ring in a clamped mode, and therefore the pump cover body is fixed. Therefore, the pump cover body is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a pump cover for a centrifugal pump with a locking structure. Background Art

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. The centrifugal pump works by using the rotation of the impeller to cause the water to undergo centrifugal motion. Before starting the water pump, the pump casing and the suction pipe must be filled with water, and then the motor is started to make the pump shaft drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing. The centrifugal pump cover is one of the main components of the centrifugal pump and plays an important role in the operation of the entire centrifugal pump.

[0003] At present, the existing centrifugal pump cover is inconvenient to install and disassemble during use. After installation, it is easy to loosen under the action of vibration, and may even leak, thereby affecting the installation effect of the centrifugal pump cover. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing centrifugal pump cover is inconvenient to install and disassemble during use, and is prone to loosening due to vibration after installation, and may even leak, thereby affecting the installation effect of the centrifugal pump cover. A pump cover for a centrifugal pump with a locking structure is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The outer wall of the pump casing is fixed with a plurality of threaded rods, the outer wall of the threaded rod is provided with a flat groove, and one end of the plug tube is fixedly connected to the pump casing, and the circumferential outer wall of the plug tube is provided with a snap ring. The pump casing is provided with a pump cover body on one side, and a groove on the one side of the pump cover body is provided with a spigot, and one end of the plug tube is plugged into the groove. A docking ring is sleeved on the outer side of the plug tube, and the docking ring is fixedly connected to the outer side of the plug tube. The circumferential outer wall of the pump casing is fixedly connected with a plurality of connecting ears

[0007] Furthermore, the clamping ring has a triangular cross-section structure.

[0008] Furthermore, a sealing ring is provided between the pump body and the pump cover body, and a sealing groove is provided on the sealing ring.

[0009] Furthermore, both ends of the sliding shaft are provided with inclined grooves.

[0010] Furthermore, a shaft sleeve is fixedly connected to one side of the pump cover body, and the shaft sleeve is located in the central part of the pump cover body.

[0011] Furthermore, one end of the return spring is fixedly connected to the sliding disk, and the other end of the return spring is fixedly connected to the outer wall of one end of the sliding hole.

[0012] Furthermore, the plurality of connecting ears are distributed in an array around the circumference of the pump cover body.

[0013] The beneficial effects of the utility model are:

[0014] 1. The sliding shaft is driven to move by pushing the pump cover body inward, so that one end of the sliding shaft moves along the plane groove of the threaded rod, and the sliding shaft moves under the extrusion of the threaded rod. When the pump cover body is covered on the pump body, the other end of the sliding shaft is engaged with the retaining ring, thereby fixing the pump cover body and preventing the pump cover body from loosening.

[0015] 2. The pump cover body can be quickly disassembled and installed through the coordinated use of the threaded rod, flat groove, snap ring, pump cover body, docking ring, connecting ear, mounting hole, fastening nut, sliding shaft and return spring, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a centrifugal pump cover with a locking structure proposed by the present invention in an installed state;

[0017] Figure 2 This is a schematic diagram of the exploded structure of a centrifugal pump cover with a locking structure proposed by the present invention in an installed state;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of a pump cover for a centrifugal pump with a locking structure proposed by the utility model;

[0019] Figure 4 The utility model provides a partial cross-sectional structural schematic diagram of a centrifugal pump cover with a locking structure in an installed state.

[0020] In the figure: 1. Pump body; 2. Threaded rod; 201. Flat groove; 3. Plug-in tube; 4. Snap ring; 5. Pump cover body; 6. Docking ring; 7. Groove; 8. Connecting ear; 9. Mounting hole; 10. Sealing ring; 11. Fastening nut; 12. Sliding hole; 13. Sliding shaft; 14. Return spring; 15. Sliding disk; 16. Shaft sleeve. DETAILED DESCRIPTION

[0021] 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 the embodiments.

[0022] Reference Figures 1-4 The outer wall of the pump cover 5 is provided with a plurality of screw threads 2, and the outer wall of the screw threaded rod 2 is provided with a flat groove 201. The outer wall of the pump cover 5 is provided with a plug-in tube 3, and the outer wall of the plug-in tube 3 is provided with a snap ring 4. The pump cover body 5 is provided on one side of the pump body 1. A groove 7 is provided on one side of the pump cover body 5. One end of the plug-in tube 3 is plugged into the groove 7. A docking ring 6 is welded on one side of the pump cover body 5. The docking ring 6 is sleeved on the outer side of the plug-in tube 3. A plurality of connecting ears 8 are welded on the circumferential outer wall of the pump cover body 5. The connecting ears 8 are provided with mounting holes 9. One end of the threaded rod 2 is plugged into the mounting hole 9. A fastening nut 11 is threadedly sleeved on this end of the threaded rod 2. A plurality of sliding holes 12 are provided on the circumferential inner wall of the docking ring 6. The sliding hole 12 is connected to the mounting hole 9. A sliding shaft 13 is slidably inserted in the sliding hole 12. The outer wall of the sliding shaft 13 is sleeved with a return spring 14. Pulling the pump cover body 5 outward drives the sliding shaft 13 along the plane of the threaded rod 2 When the pump cover body 5 is covered on the pump body 1, the other end of the sliding shaft 13 is engaged with the snap ring 4, thereby fixing the pump cover body 5 and preventing the pump cover body 5 from loosening.

[0023] The snap ring 4 has a triangular cross-sectional structure. A sealing ring 10 is provided between the pump body 1 and the pump cover body 5. A sealing groove is provided on the sealing ring 10, thereby improving the sealing between the pump body 1 and the pump cover body 5. Both ends of the sliding shaft 13 are provided with inclined grooves, which facilitates the clamping of the sliding shaft 13 and the snap ring 4, but facilitates the extrusion of the sliding shaft 13 by the threaded rod 2. A shaft sleeve 16 is welded to one side of the pump cover body 5, and the shaft sleeve 16 is located in the central part of the pump cover body 5. One end of the reset spring 14 is fixedly connected to the sliding disk 15, and the other end of the reset spring 14 is fixedly connected to the outer wall of one end of the sliding hole 12. A plurality of connecting ears 8 are distributed in an array around the circumference of the pump cover body 5.

[0024] The working principle of this embodiment is as follows: during installation, first, clamp the sealing ring 10 on one end of the plug-in tube 3, then align the mounting hole 9 on the connecting ear 8 with the threaded rod 2, and insert the threaded rod 2 into the mounting hole 9, and then push the pump cover body 5 to make the connecting ear 8 move along the threaded rod 2 until the docking ring 6 is sleeved on the outer wall of the plug-in tube 3, and at the same time, one end of the plug-in tube 3 is inserted into the groove 7, so that the pump cover body 5 covers one side of the pump body 1. At the same time, the sliding shaft 13 is driven to move during the movement of the pump cover body 5, so that one end of the sliding shaft 13 moves along the plane groove 201 of the threaded rod 2, so that the sliding shaft 13 moves under the extrusion of the threaded rod 2. When the pump cover body 5 is covered on the pump body 1, the other end of the sliding shaft 13 is clamped with the clamping ring 4, and then the fastening nut 11 is tightened to lock the pump cover body 5;

[0025] During disassembly, unscrew the fastening nut 11, then pull the pump cover body 5 outward to drive the sliding shaft 13 to move outward along the planar groove 201 of the threaded rod 2. As the pump cover body 5 moves outward, the threaded rod 2 gradually relaxes the squeeze on the sliding shaft 13, and then the sliding shaft 13 is reset under the action of the reset spring 14, occasionally causing one end of the sliding shaft 13 to gradually disengage from the retaining ring 4 until the pump cover body 5 is completely disassembled. At this time, the sliding shaft 13 is completely reset, thereby completing the disassembly of the pump cover body 5.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pump cover for a centrifugal pump with a locking structure, comprising a pump body (1), characterized in that: One side of the pump body (1) is fixedly connected to a plurality of threaded rods (2), the outer wall of the threaded rods (2) is provided with a plane groove (201), one side of the pump body (1) is fixedly connected to a plug-in tube (3), the circumferential outer wall of the plug-in tube (3) is provided with a snap ring (4), one side of the pump body (1) is provided with a pump cover body (5), one side of the pump cover body (5) is provided with a groove (7), one end of the plug-in tube (3) is plugged into the groove (7), one side of the pump cover body (5) is fixedly connected to a docking ring (6), the docking ring (6) is sleeved on the outer side of the plug-in tube (3), the circumferential outer wall of the pump cover body (5) is fixedly connected to a plurality of connecting ears (8), and the connecting ears (8) are provided with mounting holes (9), one end of the threaded rod (2) is plugged into the mounting hole (9), and a fastening nut (11) is threadedly sleeved on this end of the threaded rod (2). A plurality of sliding holes (12) are provided on the circumferential inner wall of the docking ring (6), and the sliding holes (12) are communicated with the mounting hole (9). A sliding shaft (13) is slidably inserted in the sliding hole (12), and a return spring (14) is sleeved on the outer wall of the sliding shaft (13). A sliding disk (15) is fixedly sleeved on the outer wall of the sliding shaft (13), and the sliding disk (15) slides in the sliding hole (12). One end of the sliding shaft (13) can contact the plane groove (201) of the threaded rod (2), and the other end of the sliding shaft (13) is clamped with the snap ring (4).

2. A centrifugal pump cover with a locking structure according to claim 1, characterized in that: The clamping ring (4) has a triangular cross-section.

3. The pump cover with a locking structure for a centrifugal pump according to claim 1, characterized in that: A sealing ring (10) is provided between the pump body (1) and the pump cover body (5), and a sealing groove is provided on the sealing ring (10).

4. The pump cover with a locking structure for a centrifugal pump according to claim 1, characterized in that: Both ends of the sliding shaft (13) are provided with inclined grooves.

5. The pump cover with a locking structure for a centrifugal pump according to claim 1, characterized in that: One side of the pump cover body (5) is fixedly connected with a shaft sleeve (16), and the shaft sleeve (16) is located at the center of the pump cover body (5).

6. The pump cover with a locking structure for a centrifugal pump according to claim 1, characterized in that: One end of the return spring (14) is fixedly connected to the sliding disk (15), and the other end of the return spring (14) is fixedly connected to the outer wall of one end of the sliding hole (12).

7. The pump cover with a locking structure for a centrifugal pump according to claim 1, characterized in that: The plurality of connecting ears (8) are distributed in an array around the circumference of the pump cover body (5).

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