Pump dismounting device for multistage centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a multi-stage centrifugal pump disassembling device which comprises a sleeve, a shaft sleeve limiter and a pump shaft positioner, and an inner cavity used for containing a pump shaft is formed in the sleeve. The shaft sleeve limiter is arranged on the side, close to the open end, of the sleeve and comprises a limiting sleeve and a limiting rod, the limiting sleeve is rotationally arranged on the outer side of the sleeve, one end of the limiting rod is hinged to the limiting sleeve, a long through groove is formed in the other end of the limiting rod, an opening is formed in the side wall of the sleeve, and a limiting sliding rod is fixedly connected to the limiting sleeve. The other end of the limiting rod extends out of the opening and enables the limiting sliding rod to be inserted into the long through groove in a sliding mode. A limiting mechanism is arranged between the limiting sleeve and the sleeve. Through the design that the sleeve is integrated with the limiting module, the positioning module and the driving module, efficient disassembly of the multi-stage centrifugal pump shaft sleeve is achieved, the shaft sleeve limiter adopts a rotary limiting sleeve and limiting rod linkage mechanism, and the limiting depth can be adjusted to adapt to different shaft sleeve sizes.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump technical field more specifically, relate to a kind of multistage centrifugal pump disassembly device. BACKGROUND

[0002] As common drainage equipment, multistage centrifugal pump is mainly applied in coal mine, chemical industry, coking and other working conditions. When corrosion occurs, shaft sleeve and pump shaft are prone to lock, making disassembly difficult. Traditional disassembly tools rely on manual knocking or hammering, which has poor universality, large separation resistance and other defects. Manual disassembly is low in efficiency and high in labor intensity, which can easily damage reusable parts and directly affect water pump maintenance time. The existing device has a complicated operation process, relies on multiple people to cooperate, is low in efficiency and has safety hazards, so there is an urgent need for a disassembly device with adjustable and stable force.

[0003] Therefore, it is necessary to improve the prior art. UTILITY MODEL CONTENT

[0004] In order to overcome the deficiencies in the prior art, a multistage centrifugal pump disassembly device is provided, which is convenient to use and suitable for different sizes of shaft sleeve

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A multistage centrifugal pump disassembly device comprises:

[0007] A sleeve is provided with an inner cavity for placing a pump shaft. One end of the sleeve is open, and the other end is provided with a linear actuator.

[0008] A shaft sleeve limiter is arranged on one side of the sleeve close to the open end and comprises a limiting sleeve and a limiting rod. The limiting sleeve is rotatably arranged on the outside of the sleeve. One end of the limiting rod is hingedly connected to the limiting sleeve, and the other end of the limiting rod is provided with a long slot. The side wall of the sleeve is provided with an opening. A limiting slide rod is fixedly connected to the limiting sleeve. The other end of the limiting rod extends from the opening and makes the limiting slide rod slide and insert into the long slot. A limiting mechanism is arranged between the limiting sleeve and the sleeve.

[0009] A pump shaft positioner is arranged in the sleeve and comprises a plurality of positioning rods evenly distributed along the circumference of the sleeve. One end of each positioning rod close to the axis of the sleeve is rotatably provided with a roller.

[0010] Preferably, the limiting mechanism comprises an outer gear ring and a limiting rack matched with the outer gear ring. The outer gear ring is fixedly arranged on the outside of the sleeve. A limiting box is fixedly arranged on the shaft sleeve limiter. The limiting rack is slidably arranged in the limiting box. One end of the limiting rack away from the outer gear ring is fixedly connected with a control rod. A return spring is sleeved on the control rod. Both ends of the return spring are tightly abutted with the limiting box and the limiting rack, respectively.

[0011] One end of the control rod extends out of the limiting box.

[0012] Preferably, three positioning rods are provided, and the positioning rods are telescopic rods, and a compression spring is sleeved on each telescopic rod, and two ends of the compression spring are connected with two ends of the telescopic rod respectively.

[0013] Preferably, a heating device is further included, and the heating device is arranged between the shaft sleeve limiter and the pump shaft limiter, and heat insulation rings are arranged on two sides of the heating device.

[0014] Preferably, the linear driver is a hydraulic cylinder, and a piston rod of the hydraulic cylinder extends into the shaft sleeve limiter.

[0015] Preferably, the sleeve side wall is provided with an observation port.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model discloses a sleeve integrated limiting, positioning and driving module design, realize multistage centrifugal pump shaft sleeve high -efficient dismounting: shaft sleeve limiter adopts rotary limiting sleeve and limiting rod linkage mechanism, and the limiting depth can be adjusted to adapt to different shaft sleeve sizes, and the stable operation is guaranteed in combination with rack and pinion locking mechanism, and the spring telescopic rod of pump shaft limiter and the three -point support structure of gyro wheel automatically adapt pump shaft radial size, realize the support of different diameter pump shaft, and integrated electric heating wire and heat insulation ring realize the local heating expansion of shaft sleeve, and can significantly reduce the separation resistance. BRIEF DESCRIPTION OF DRAWINGS

[0018] The specific embodiment of the utility model will be further explained in detail below with the drawings.

[0019] Figure 1 It is whole structure schematic view of the utility model;

[0020] Figure 2 It is sectional view of the utility model;

[0021] Figure 3 It is shaft sleeve limiter structure schematic view;

[0022] Figure 4 It is pump shaft limiter structure schematic view;

[0023] Figure 5 It is the sectional view of one angle of limiting mechanism;

[0024] Figure 6 It is the sectional view of another angle of limiting mechanism.

[0025] In the diagram: 1-sleeve, 11-observation port, 2-pump shaft, 3-linear actuator, 4-shaft sleeve limiter, 41-limit sleeve, 42-limit rod, 43-long through groove, 44-limit slide rod, 5-limiting mechanism, 51-external gear ring, 52-limit rack, 53-limit box, 54-control rod, 55-return spring, 6-pump shaft positioner, 61-positioning rod, 62-roller, 63-compression spring, 7-heating device, 71-heat insulation ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] like Figures 1 to 6 As shown, a multi-stage centrifugal pump dismantling device includes a sleeve 1, a shaft sleeve limiter 4, and a pump shaft locator 6. One end of the sleeve 1 is open, and an internal cavity is provided for placing the pump shaft 2. Both the shaft sleeve limiter 4 and the pump shaft locator 6 are mounted on the sleeve 1. The shaft sleeve limiter 4 is used to axially limit the shaft sleeve on the pump shaft 2, and the pump shaft locator 6 is used to radially support the pump shaft 2. A linear actuator 3 is provided at the other end of the sleeve 1. The linear actuator 3 presses the pump shaft 2 against it and separates the pump shaft 2 from the shaft sleeve.

[0029] Specifically, the bushing limiter 4 is located on the side of the sleeve 1 near the open end, and includes a limit sleeve 41 and a limit rod 42. The limit sleeve 41 is rotatably located on the outside of the sleeve 1, and there is no axial relative displacement between the limit sleeve 41 and the sleeve 1. One end of the limit rod 42 is hinged to the limit sleeve 41, and the other end of the limit rod 42 is provided with a long through groove 43. The side wall of the sleeve 1 is provided with an opening, and a limit sliding rod 44 is fixedly connected to the limit sleeve 41. The other end of the limit rod 42 extends out of the opening and slides into the long through groove 43. When the limit sleeve 41 rotates, the limit rod 42 is driven to rotate through the cooperation of the limit sliding rod 44 and the long through groove 43, thereby limiting the axial movement of the bushing.

[0030] By rotating the limiting sleeve 41 at different angles, the size of the limiting rod 42 inserted into the bushing 1 can be adjusted, thereby positioning pump shafts 2 and bushings of different sizes.

[0031] In order to prevent the limiting sleeve 41 from rotating during the working process, a limiting mechanism 5 is arranged between the limiting sleeve 41 and the sleeve 1. In the embodiment, the limiting mechanism 5 comprises an outer gear ring 51 and a limiting rack 52 matched with the outer gear ring 51, the outer gear ring 51 is fixedly arranged on the outer side of the sleeve 1, a limiting box 53 is fixedly arranged on the shaft sleeve limiter 4, the limiting rack 52 is slidingly arranged in the limiting box 53, the end of the limiting rack 52 away from the outer gear ring 51 is fixedly connected with a control rod 54, the control rod 54 is sleeved with a return spring 55, and the two ends of the return spring 55 are respectively abutted against the limiting box 53 and the limiting rack 52. When the control rod 54 is not subjected to external force, the return spring 55 presses the limiting rack 52 on the outer gear ring 51, so that the limiting sleeve 41 cannot rotate relative to the outer gear ring 51, and the limiting sleeve 41 and the limiting rod 42 are positioned.

[0032] In order to facilitate the alignment of the linear driver 3 and the pump shaft 2, the pump shaft 2 needs to be maintained at a certain position. Specifically, the pump shaft positioner 6 comprises a plurality of positioning rods 61 evenly distributed along the circumference of the sleeve 1, and a roller 62 is rotatably arranged on the end of each positioning rod 61 close to the axis of the sleeve 1. The pump shaft 2 is inserted between the plurality of rollers 62, and the support of the shaft sleeve limiter 4 on the pump shaft 2 can approximately maintain the pump shaft 2 at the position of the axis of the sleeve 1.

[0033] Preferably, the positioning rod 61 and the roller 62 are both arranged in three, and the positioning rod 61 is a telescopic rod, and a compression spring 62 is sleeved on the telescopic rod, and the two ends of the compression spring 62 are connected with the two ends of the telescopic rod. Through the design of the telescopic rod and the spring, it can be applied to pump shafts 2 of different sizes.

[0034] In order to reduce the connecting force between the shaft sleeve and the pump shaft 2, a heating device 7 is further arranged between the shaft sleeve limiter 4 and the pump shaft positioner 6, and is matched with the position of the shaft sleeve. The heating device 7 is used to heat the shaft sleeve to make it expand. Heat insulating rings 71 are arranged on both sides of the heating device 7 to reduce heat loss. Preferably, the heating device 7 adopts an electric heating wire.

[0035] Preferably, the linear driver 3 is a hydraulic cylinder, and the piston rod of the hydraulic cylinder extends into the shaft sleeve limiter 4 to apply force to the pump shaft 2.

[0036] The side wall of the sleeve 1 is provided with an observation port 11 to facilitate the observation of the dismounting progress of the pump shaft 2 and the shaft sleeve.

[0037] The above only describes the preferred embodiment of the utility model in detail, but the utility model is not limited to the above-mentioned embodiment, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model, and various changes should be included in the protection range of the utility model.

Claims

1. A multi-stage centrifugal pump disassembly device, characterized by, The utility model relates to a pump shaft positioning device, including: A sleeve (1) is provided with an inner cavity for placing a pump shaft (2) in the sleeve (1), the sleeve (1) is open at one end, and a linear drive (3) is arranged at the other end; A shaft sleeve limiter (4) is arranged on one side of the sleeve (1) close to the open end, including a limiting sleeve (41) and a limiting rod (42), the limiting sleeve (41) is rotatably arranged on the outside of the sleeve (1), one end of the limiting rod (42) is hinged to the limiting sleeve (41), the other end of the limiting rod (42) is provided with a long slot (43), and the side wall of the sleeve (1) is provided with an opening; a limiting slide rod (44) is fixedly connected to the limiting sleeve (41), the other end of the limiting rod (42) extends out of the opening and makes the limiting slide rod (44) slidably arranged in the long slot (43); a limiting mechanism (5) is arranged between the limiting sleeve (41) and the sleeve (1); A pump shaft positioner (6) is arranged in the sleeve (1) and includes a plurality of positioning rods (61) evenly distributed along the circumference of the sleeve (1), and one end of the positioning rod (61) close to the axis of the sleeve (1) is rotatably provided with a roller (62).

2. A multi-stage centrifugal pump disassembly apparatus according to claim 1, wherein: The limiting mechanism (5) includes an outer gear ring (51) and a limiting rack (52) matched with the outer gear ring (51), the outer gear ring (51) is fixedly arranged on the outside of the sleeve (1), a limiting box (53) is fixedly arranged on the shaft sleeve limiter (4), the limiting rack (52) is slidably arranged in the limiting box (53), one end of the limiting rack (52) away from the outer gear ring (51) is fixedly connected with a control rod (54), a return spring (55) is sleeved on the control rod (54), and the two ends of the return spring (55) are respectively abutted against the limiting box (53) and the limiting rack (52); One end of the control rod (54) extends out of the limiting box (53).

3. A multi-stage centrifugal pump disassembly apparatus according to claim 1, wherein: The positioning rod (61) is provided with three, the positioning rod (61) is a telescopic rod, a compression spring (63) is sleeved on the telescopic rod, and the two ends of the compression spring (63) are connected with the two ends of the telescopic rod.

4. A multi-stage centrifugal pump disassembly apparatus according to claim 1, wherein: Further comprising a heating device (7), the heating device (7) is arranged between the shaft sleeve limiter (4) and the pump shaft positioner (6), and heat insulation rings (71) are arranged on the two sides of the heating device (7).

5. A multi-stage centrifugal pump disassembly apparatus according to claim 1, wherein: The linear drive (3) is a hydraulic cylinder, and the piston rod of the hydraulic cylinder extends into the shaft sleeve limiter (4).

6. A multi-stage centrifugal pump disassembly apparatus according to claim 1, wherein: The side wall of the sleeve (1) is provided with an observation port (11).

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