Expansion shaft for maintaining shield pump

Abstract

The utility model relates to the technical field of shield pump maintenance, and discloses an expansion shaft for maintaining a shield pump, which comprises a main body mechanism and an auxiliary mechanism, the auxiliary mechanism is positioned at the outer end of the main body mechanism, the main body mechanism comprises a fixed roller, a locking nut and an oil pressure device, and the locking nut is movably mounted at the lower end of the fixed roller. According to the expansion shaft for maintaining the shield pump, through installation of a main body mechanism and installation of a locking nut, disassembly, replacement and installation of a fixed roller and a telescopic roller are facilitated, an oil pressure device is started, the telescopic roller is driven to push an extrusion block to clean the interior of the shield pump, and blockages in a cavity of the shield pump are extruded out of a pump body; the filtering cotton is used for filtering sewage, immersed in the expansion shaft, in the cavity of the canned motor pump, the water absorbing cotton further absorbs water stains and prevents the water stains from continuously permeating into the oil pressure device, the device is conveniently fixed through the clamping groove, noise generated when the device operates can be reduced through the sound absorbing cotton on the inner side of the limiting sleeve, and the safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical automation, in particular to an expansion shaft for repairing a shielded pump. Background Art

[0002] The canned pump is a sealless pump. The pump and the drive motor are sealed in a pressure vessel filled with the pumped medium. The pressure vessel has only static seals and a wire group to provide a rotating magnetic field and drive the rotor. This structure eliminates the rotating shaft sealing device of the traditional centrifugal pump, so it can be completely leak-free.

[0003] The existing patent CN207900265U proposes a shaft expansion device for repairing a shielded pump. The utility model includes a nut, a buffer pad, a spacer, a tapered hole sleeve and a sealing pad. The inner diameter of the nut, buffer pad and spacer is equal to the outer diameter of the core shaft, and they are tightly mounted on the core shaft in sequence. The tapered hole sleeve is mounted on the outer diameter of the inner hole of the pump chamber, and the tapered hole sleeve abuts against the sealing pad; the top ring is welded at the maximum outer diameter of the inner hole of the pump chamber. The utility model makes the outer cylindrical surface of the expansion shaft fully contact with the inner cylindrical surface of the pump chamber, and then the end faces and stop faces at both ends of the pump body are machined based on the center line of the expansion shaft, thereby ensuring the verticality and coaxiality requirements of the shielded pump and fully meeting the shape and position tolerance requirements of the workpiece. The shaft expansion device is easy and quick to assemble and disassemble, saving clamping time and thus improving production efficiency.

[0004] However, although the existing patent CN207900265U is convenient and quick to assemble and disassemble, saving clamping time and thus improving production efficiency, when the shielded pump is repaired by using the expansion shaft, the obstruction and mixed sewage inside the shielded pump may penetrate into the interior of the expansion shaft along the gap of the expansion shaft, which may then affect the sensitivity of the internal components of the expansion shaft, accelerate the rust of the expansion shaft, and may also accelerate the rust of the expansion shaft. Utility Model Content

[0005] The purpose of the utility model is to provide an expansion shaft for repairing a shielded pump, so as to solve the problem mentioned in the above-mentioned background technology that when the shielded pump is repaired by using the expansion shaft, the obstruction and mixed sewage inside the shielded pump may penetrate into the interior of the expansion shaft along the gap of the expansion shaft, which may then affect the sensitivity of the internal components of the expansion shaft, accelerate the rust of the expansion shaft, and may also accelerate the corrosion of the expansion shaft.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shaft expansion device for repairing a shielded pump, comprising a main mechanism and an auxiliary mechanism, wherein the auxiliary mechanism is located at the outer end of the main mechanism, and the main mechanism comprises a fixed roll, a locking nut and an oil pressure device, wherein the locking nut is movably mounted on the lower end of the fixed roll, and the oil pressure device is fixedly mounted on the lower end of the locking nut; the main mechanism also comprises a telescopic roll, an extrusion block, filter cotton, absorbent cotton, a slot, a limit sleeve and sound-absorbing cotton, and the telescopic roll is fixedly mounted on the inner side of the fixed roll.

[0007] Preferably, the extrusion block is fixedly mounted on the outer end of the telescopic roller, and the filter cotton is fixedly arranged on the inner side of the fixed roller. The installation of the locking nut facilitates the disassembly, replacement and installation of the fixed roller and the telescopic roller, thereby improving the convenience of the device.

[0008] Preferably, the filter cotton is fixedly arranged above the locking nut, and the absorbent cotton is fixedly arranged on the inner side of the filter cotton. When the oil pressure device is started, the telescopic roller is driven to push the extrusion block to clean the inside of the shielded pump, and the blockage inside the shielded pump cavity is squeezed out of the pump body, thereby improving the practicality of the device.

[0009] Preferably, the absorbent cotton is fixedly arranged above the locking nut, and the slot is fixedly arranged at the upper end of the oil pressure device. The filter cotton is used to filter the sewage immersed in the expansion shaft inside the shielding pump cavity, and the absorbent cotton further absorbs the water stains to prevent them from continuing to penetrate into the interior of the oil pressure device, thereby improving the safety of the device.

[0010] Preferably, the limiting sleeve is fixedly mounted on the lower end of the oil pressure device, and the sound-absorbing cotton is fixedly arranged on the inner side of the limiting sleeve. The setting of the card groove facilitates the fixation of the device, and the sound-absorbing cotton on the inner side of the limiting sleeve can reduce the noise generated when the device is running.

[0011] Preferably, the auxiliary mechanism includes a leakproof gasket, a sealing ring 1 and a sealing ring 2, wherein the leakproof gasket is fixedly installed in the middle of the fixing roll and the locking nut, and the installation of the leakproof gasket can increase the sealing between the fixing roll and the locking nut.

[0012] Preferably, the sealing ring 1 is movably installed on the inner side of the locking nut, and the sealing ring 2 is movably installed on the inner side of the sealing ring 1. The installation of the sealing ring 1 and the sealing ring 2 can increase the sealing between the locking nut and the oil pressure device.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The expansion shaft for repairing the shielded pump is convenient for disassembly, replacement and installation of the fixed roller and the telescopic roller through the installation of the main mechanism and the installation of the locking nut. The oil pressure device is started, and the telescopic roller is driven to push the extrusion block to clean the inside of the shielded pump, and the blockage inside the shielded pump cavity is squeezed out of the pump body. The filter cotton is used to filter the sewage immersed in the expansion shaft inside the shielded pump cavity, and the absorbent cotton further absorbs the water stains to prevent it from continuing to penetrate into the inside of the oil pressure device. The setting of the card slot is convenient for fixing the device. The sound-absorbing cotton inside the limit sleeve can reduce the noise generated when the device is running, thereby improving the safety of the device.

[0015] 2. The expansion shaft used for repairing the shielded pump can increase the sealing performance between the fixed roll and the locking nut by installing the auxiliary mechanism and the anti-leakage gasket, and the installation of the sealing ring 1 and the sealing ring 2 can increase the sealing performance between the locking nut and the oil pressure device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the partial cross-section structure of the fixed roller of the utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting sleeve of the utility model.

[0020] In the figure: 1. main mechanism; 101. fixed roller; 102. locking nut; 103. oil pressure device; 104. telescopic roller; 105. extrusion block; 106. filter cotton; 107. absorbent cotton; 108. slot; 109. limit sleeve; 110. sound-absorbing cotton; 2. auxiliary mechanism; 201. leak-proof gasket; 202. sealing ring 1; 203. sealing ring 2. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4The utility model provides a technical solution: a shaft expansion device for repairing a shielded pump, comprising a main mechanism 1 and an auxiliary mechanism 2, the auxiliary mechanism 2 is located at the outer end of the main mechanism 1, the main mechanism 1 comprises a fixed roll 101, a locking nut 102 and an oil pressure device 103, the locking nut 102 is movably mounted at the lower end of the fixed roll 101, and the oil pressure device 103 is fixedly mounted at the lower end of the locking nut 102; the main mechanism 1 also comprises a telescopic roll 104, an extrusion block 105, a filter cotton 106, a water-absorbing cotton 107, a slot 108, a limiting sleeve 109 and a sound-absorbing cotton 110, a telescopic roll 104, an extrusion block 105, a filter cotton 106, a water-absorbing cotton 107, a slot 108, a limiting sleeve 109 and a sound-absorbing cotton 110, Roll 104 is fixedly installed on the inner side of fixed roll 101, extrusion block 105 is fixedly installed on the outer end of telescopic roll 104, filter cotton 106 is fixedly installed on the inner side of fixed roll 101, filter cotton 106 is fixedly installed above locking nut 102, absorbent cotton 107 is fixedly installed on the inner side of filter cotton 106, absorbent cotton 107 is fixedly installed above locking nut 102, slot 108 is fixedly installed on the upper end of oil pressure device 103, limiting sleeve 109 is fixedly installed on the lower end of oil pressure device 103, and sound-absorbing cotton 110 is fixedly installed on the inner side of limiting sleeve 109.

[0023] The auxiliary mechanism 2 includes a leakproof gasket 201, a sealing ring 1 202 and a sealing ring 203. The leakproof gasket 201 is fixedly installed in the middle of the fixed roll 101 and the locking nut 102, the sealing ring 1 202 is movably installed on the inner side of the locking nut 102, and the sealing ring 203 is movably installed on the inner side of the sealing ring 1 202. When the expansion shaft for repairing the shielded pump is used, the installation of the locking nut 102 facilitates the disassembly, replacement and installation of the fixed roll 101 and the telescopic roll 104. The oil pressure device 103 is started, and the telescopic roll 104 is driven to push the extrusion block 105 to clean the inside of the shielded pump, so that the shielded pump cavity is The blockage inside the body is squeezed out of the pump body, and the filter cotton 106 is used to filter the sewage that is immersed in the expansion shaft inside the shielded pump cavity. The absorbent cotton 107 further absorbs the water stains to prevent it from continuing to penetrate into the interior of the oil pressure device 103. The setting of the slot 108 is convenient for fixing the device. The sound-absorbing cotton 110 on the inside of the limiting sleeve 109 can reduce the noise generated by the device during operation. The installation of the leak-proof gasket 201 can increase the sealing between the fixing roll 101 and the locking nut 102, and the installation of the sealing ring 1 202 and the sealing ring 2 203 can increase the sealing between the locking nut 102 and the oil pressure device 103.

[0024] Working principle: When using the expansion shaft for repairing the shielded pump, the installation of the locking nut 102 facilitates the disassembly, replacement and installation of the fixed roller 101 and the telescopic roller 104. The oil pressure device 103 is started, and the telescopic roller 104 is driven to push the extrusion block 105 to clean the inside of the shielded pump, and the blockage inside the shielded pump cavity is squeezed out of the pump body. The filter cotton 106 is used to filter the sewage immersed in the expansion shaft inside the shielded pump cavity. The absorbent cotton 107 further absorbs the water stains to prevent it from continuing to penetrate into the interior of the oil pressure device 103. The setting of the slot 108 facilitates the fixation of the device. The sound-absorbing cotton 110 on the inner side of the limiting sleeve 109 can reduce the noise generated during the operation of the device. The installation of the leak-proof gasket 201 can increase the sealing between the fixed roller 101 and the locking nut 102. The installation of the sealing ring 1 202 and the sealing ring 2 203 can increase the sealing between the locking nut 102 and the oil pressure device 103.

[0025] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A shaft expansion device for repairing a canned motor pump, comprising a main mechanism (1) and an auxiliary mechanism (2), characterized in that: The auxiliary mechanism (2) is located at the outer end of the main mechanism (1); the main mechanism (1) comprises a fixed roller (101), a locking nut (102) and a hydraulic device (103); the locking nut (102) is movably mounted on the lower end of the fixed roller (101); and the hydraulic device (103) is fixedly mounted on the lower end of the locking nut (102); The main body mechanism (1) further comprises a telescopic roller (104), a squeezing block (105), filter cotton (106), water-absorbing cotton (107), a slot (108), a limiting sleeve (109) and sound-absorbing cotton (110); the telescopic roller (104) is fixedly mounted on the inner side of the fixed roller (101).

2. The expansion shaft for repairing a canned motor pump according to claim 1, characterized in that: The extrusion block (105) is fixedly mounted on the outer end of the telescopic roller (104), and the filter cotton (106) is fixedly arranged on the inner side of the fixed roller (101).

3. The expansion shaft for repairing a canned motor pump according to claim 2, characterized in that: The filter cotton (106) is fixedly arranged above the locking nut (102), and the water-absorbing cotton (107) is fixedly arranged on the inner side of the filter cotton (106).

4. The expansion shaft for repairing a canned motor pump according to claim 3, characterized in that: The absorbent cotton (107) is fixedly arranged above the locking nut (102), and the clamping groove (108) is fixedly arranged at the upper end of the oil pressure device (103).

5. The expansion shaft for repairing a canned motor pump according to claim 4, characterized in that: The limiting sleeve (109) is fixedly mounted on the lower end of the oil pressure device (103), and the sound-absorbing cotton (110) is fixedly arranged on the inner side of the limiting sleeve (109).

6. The expansion shaft for repairing a canned motor pump according to claim 5, characterized in that: The auxiliary mechanism (2) comprises a leakproof gasket (201), a sealing ring 1 (202) and a sealing ring 2 (203); the leakproof gasket (201) is fixedly mounted on the middle of the fixing roller (101) and the locking nut (102).

7. The expansion shaft for repairing a canned motor pump according to claim 6, characterized in that: The sealing ring 1 (202) is movably mounted on the inner side of the locking nut (102), and the sealing ring 2 (203) is movably mounted on the inner side of the sealing ring 1 (202).

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