A large water pump maintenance and dismounting device for central pump house

Abstract

This utility model relates to the field of large water pump disassembly technology, and discloses a maintenance and disassembly device for large water pumps in a central pump house. The device includes an impeller disassembly mechanism for disassembling the impeller of a large water pump. The impeller disassembly mechanism includes a pushing structure supported on the main shaft of the water pump, and a reverse pulling structure cooperating with the pushing structure. The reverse pulling structure includes a bracket with several reverse pull rods hinged to it. Several anti-detachment structures cooperating with the reverse pull rods are installed on the bracket to prevent the reverse pull rods from detaching from the impeller and springing back when pulling the impeller. This device not only offers high stability and safety during disassembly, but also high flexibility and operability, enabling the disassembly of impellers from various types of water pumps in a pump house.

Description

Technical Field

[0001] This utility model belongs to the field of large water pump dismantling technology, and in particular relates to a device for the maintenance and dismantling of large water pumps in a central pump house. Background Technology

[0002] In the process of coal mining, in order to pump out water accumulated in the mine, seepage water or water from underground rivers, it is often necessary to build a central pump house in the mine. The entire mining area is pumped out by high-power water pumps installed in the central pump house.

[0003] In mining operations, the maintenance and monitoring of water pumps are crucial for ensuring safe operation. Therefore, timely and efficient repair of damaged large water pumps is essential in practice. The main structure of a large water pump includes the pump casing, impeller, main shaft driving the impeller, and power structure such as the motor.

[0004] As the pumping structure of a water pump, the impeller is often a vulnerable part. This is mainly because large water pumps frequently experience impeller damage, such as deformation, due to phenomena like "water hammer" during pumping. This, in turn, leads to noticeable abnormal noises during pump operation. Therefore, it is necessary to disassemble and repair the water pump impeller promptly.

[0005] For example, if the water seal on the impeller shaft of a water pump ages due to prolonged use, its sealing performance may decrease, leading to water leakage. All such malfunctions require disassembling the water pump impeller for repair (the water seal can only be replaced after the impeller is removed).

[0006] Large water pump impellers are often quite heavy. During disassembly, to protect the impeller, existing technology uses a hydraulic cylinder to pull it outwards from the inner edge. Specifically, this is achieved by pulling on a lever mounted on the piston rod of the hydraulic cylinder. However, in actual operation, it has been found that the lever can detach from the impeller during the pulling process, if the lever's engagement depth is insufficient. A sudden breakage at the lever's engagement end can cause the lever to suddenly rebound under immense pulling force (the lever is hinged), posing a serious safety hazard to maintenance personnel (in practice, such accidents occur when the suddenly broken lever strikes the operator's arm, resulting in a serious injury).

[0007] Therefore, it is very important to improve the efficiency of water pump maintenance operations by using a large water pump impeller disassembly device with high disassembly efficiency and high disassembly safety. Utility Model Content

[0008] Based on the above background, the purpose of this utility model is to provide a maintenance and disassembly device for large water pumps in a central pumping station.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A maintenance and disassembly device for a large water pump in a central pump house includes an impeller disassembly mechanism for disassembling the impeller of the large water pump.

[0011] The impeller disassembly mechanism includes a pushing structure supported on the main shaft of the water pump, and a reverse pulling structure that cooperates with the pushing structure. The reverse pulling structure includes a bracket with several reverse pull rods hinged on the bracket.

[0012] The bracket is equipped with several anti-detachment structures that cooperate with the anti-pull rod to prevent the anti-pull rod from detaching from the impeller and springing back when it pulls the impeller.

[0013] Preferably, the pushing structure includes a pushing hydraulic cylinder, wherein the piston rod of the pushing hydraulic cylinder is detachably mounted with a support rod that supports the end of the water pump main shaft;

[0014] A sliding sleeve is slidably connected to the support rod, and the sliding sleeve is fixedly connected to the bracket through an installation structure.

[0015] Preferably, the longitudinal cross-sectional shape of the bracket is annular;

[0016] The sliding sleeve is located at the center of the bracket, and the mounting structure includes limiting sleeves that are fixedly connected to the top and bottom of the sliding sleeve respectively;

[0017] A pair of long pins are slidably connected to the bracket. The long pins pass through the limiting sleeve, and the locking end of the long pin passes through the side wall of the bracket. The locking end of the long pin is threaded with an anti-loosening nut.

[0018] Preferably, the outer wall of the bracket is welded with a plurality of hinge seats, and the inner end of the anti-pull rod is hinged to the hinge seats by a pin.

[0019] Preferably, the anti-detachment structure includes an adjustment port on the anti-pull rod and an anti-detachment screw welded and fixed to the side wall of the bracket. The anti-detachment screw passes obliquely through the adjustment port, and a spacer nut is threaded to the outer end of the anti-detachment screw.

[0020] Preferably, the sliding sleeve is slidably connected to a slide frame structure, and the slide frame structure is fixedly installed on the cylinder of the hydraulic cylinder.

[0021] When the piston rod of the hydraulic cylinder pushes against the main shaft of the water pump, the reverse thrust pushes the cylinder barrel of the hydraulic cylinder to pull the support in the direction of the push.

[0022] Preferably, sliding supports are fixedly connected to the two side walls of the sliding sleeve;

[0023] The carriage structure includes slide rails that are fixedly connected to the sliding support, and a cylinder support is fixedly connected to the cylinder of the push hydraulic cylinder, with both ends of the cylinder support fixedly installed on the slide rails.

[0024] Preferably, a support carriage is slidably connected to both sides of the slide rail rod;

[0025] A pusher trolley structure is fixedly installed between the bottoms of the support carriage.

[0026] Preferably, the pushing trolley structure includes a frame, and the bottom of the supporting carriage is fixedly mounted on the frame;

[0027] The bottom of the vehicle frame is equipped with several omnidirectional wheels.

[0028] Preferably, the end of the anti-pull rod is detachably fitted with a claw.

[0029] This utility model has the following beneficial effects:

[0030] 1. During operation, the pull rod is flipped until the claw at its end engages deeply into the inner edge of the impeller. During this process, the anti-detachment screw adjusts its penetration depth within a certain length of adjustment slot. Once the engagement is stable, the operator tightens the spacer nut inwards until it contacts the pull rod. This ensures that all pull rods remain in a stable, taut position, preventing them from detaching from the impeller. Furthermore, in the event of a claw breakage, the pull rod in its contacting state will not rebound outwards, significantly increasing the safety of disassembly and maintenance.

[0031] 2. The installation structure design allows for easy disassembly of the bracket (pull rod) structure to separate it from the hydraulic cylinder (and the support rod), enabling on-site assembly during operation;

[0032] Secondly, during the operation, after the anti-pull rod is tightened according to the method of Example 1, it is locked in place by the partition nut and anti-loosening screw to prevent it from being pulled out. Then, the operator puts the sliding sleeve into the support rod and slides the sliding sleeve on the support rod. Then, the long pin is inserted into the bracket, passes through the limiting sleeve and goes through the other side of the bracket, and then the anti-loosening nut is tightened.

[0033] In this method, the long pin can be inserted into the limiting sleeve (sliding and aligning with the through hole on the bracket through the sliding sleeve), thereby enabling the bracket-reverse tie rod structure to first tighten the impeller and lock it in place, and then install it onto the push hydraulic cylinder structure, thus increasing the flexibility of operation.

[0034] 3. The impeller disassembly device disclosed in this utility model not only has high stability and safety in disassembly, but also high flexibility in operation. It can disassemble the impellers of various water pumps in the pump room. The key feature is that the disassembly is highly safe and stable. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the disassembled impeller in an embodiment of the present utility model;

[0037] Figure 2 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0038] Figure 3 This is a schematic diagram of the installation structure in an embodiment of the present utility model;

[0039] Figure 4 This is a schematic diagram of the anti-detachment structure in an embodiment of the present invention;

[0040] Figure 5 This is an embodiment of the present utility model. Figure 2 The front view in the middle;

[0041] Figure 6 This is an embodiment of the present utility model. Figure 2 Top view in the middle;

[0042] Figure 7 This is an embodiment of the present utility model. Figure 2 The right view in the image.

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] 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.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] Example 1

[0048] like Figure 1-7 As shown, a maintenance and disassembly device for a large water pump in a central pump house includes an impeller disassembly mechanism for disassembling the impeller of a large water pump. Specifically, the impeller disassembly mechanism includes a pushing structure supported on the main shaft 11 of the water pump, and a reverse pulling structure 2 that cooperates with the pushing structure. The reverse pulling structure 2 includes a bracket 21, on which several reverse pull rods 22 are hinged.

[0049] Specifically, the longitudinal cross-sectional shape of the support 21 is annular (steel structure support 21). Three hinge seats 211 with rotating shaft arrays are welded on the outer wall of the support 21. According to the existing hinge method, the inner end of the anti-pull rod 22 (a thickened steel structure arm) is hinged to the hinge seat 211 by a pin.

[0050] A claw head 23 is detachably installed at the inner end of the anti-pull rod 22, forming an L-shaped pull structure perpendicular to the anti-pull rod 22. Specifically, a locking screw is threaded onto the claw head 23, and the locking screw is fastened to the end of the anti-pull rod 22 (correspondingly, a threaded groove is opened at the end of the anti-pull rod 22). The purpose is to allow for the replacement of the claw head 23. In the traditional one-piece molded structure, if the pull end breaks or deforms, the entire pull arm must be replaced (because the impeller of a large water pump, especially one with rust, is subjected to greater force during the pulling process, making it more susceptible to damage).

[0051] Traditional pull arms, especially those that have been used for a long time, can become detached and bounce back when pulled, especially if the end of the pull arm breaks (the hanging end) or if the end of the pull arm is not fully engaged with the inside of the impeller during operation (insufficient engagement depth). This is very dangerous. Therefore, this utility model effectively solves this problem with an anti-detachment structure, ensuring operational safety while ensuring the smooth pulling of the impeller from the main shaft.

[0052] Specifically, the bracket 21 is equipped with three anti-detachment structures that cooperate with the anti-pull rod 22 to prevent the anti-pull rod 22 from detaching from the impeller and springing back when it pulls the impeller.

[0053] Specifically, the anti-detachment structure includes an adjustment port on the anti-pull rod 22, and an anti-detachment screw 26 welded and fixed to the side wall of the bracket 21. The anti-detachment screw 26 passes through the adjustment port at an angle, and a spacer nut 261 is threadedly connected to the outer end of the anti-detachment screw 26.

[0054] During operation, the pull rod 22 is flipped until the claw 23 at its end engages deeply into the inner edge of the impeller. During this process, the anti-detachment screw 26 adjusts its penetration depth within a certain length of the adjustment port. Once the engagement is stable, the operator tightens the spacer nut 261 inwards until it contacts the pull rod 22. This serves two purposes: firstly, it keeps all pull rods 22 in a stable, taut position, preventing them from detaching from the impeller; secondly, in the event of a breakage of the claw 23, the pull rod 22, in its contacted state, will not rebound outwards, significantly increasing the safety of disassembly and maintenance.

[0055] Example 2

[0056] like Figure 1-7 As shown, based on the structure of Embodiment 1, the above-mentioned pushing structure includes a pushing hydraulic cylinder 3. The piston rod of the pushing hydraulic cylinder 3 is detachably mounted with a support rod 25 that supports the end of the water pump main shaft 11 (specifically, the support rod 25 is connected to the piston rod of the pushing hydraulic cylinder 3 via a flange connection).

[0057] A sliding sleeve 43 (the sliding sleeve 43 is rectangular in shape and is a steel structure sleeve) is slidably connected to the support rod 25, and the sliding sleeve 43 is fixedly connected to the bracket 21 through an installation structure.

[0058] The sliding sleeve 43 is located at the center of the bracket 21. The mounting structure includes a limiting sleeve 431 that is fixedly connected to the top and bottom of the sliding sleeve 43 (also fixedly welded to the top and bottom of the limiting sleeve 431).

[0059] A pair of long pins 24 (the long pins 24 are thickened steel rods) are slidably connected on the bracket 21 with the upper and lower ends spaced apart. The long pins 24 pass through the limiting sleeve 431, and the locking end (i.e. the front end) of the long pins 24 passes through the side wall of the bracket 21. The locking end of the long pins 24 is threaded with an anti-loosening nut.

[0060] The purpose of the above installation structure design is:

[0061] 1. Firstly, it facilitates the disassembly of the bracket 21 (reverse tie rod 22) structure to separate it from the hydraulic cylinder 3 (and the support rod 25), enabling on-site assembly during operation;

[0062] Secondly, during the operation, after the anti-pull rod 22 is tightened according to the method of Example 1, it is locked in place by the partition nut 261 and the anti-loosening screw 26 to prevent it from being pulled out. Then, the operator puts the sliding sleeve 43 into the support rod 25 and slides the sliding sleeve 43 on the support rod 25. Then, the long pin 24 is inserted into the bracket 21, passes through the limiting sleeve 431 and goes through the other side of the bracket 21, and then the anti-loosening nut is tightened.

[0063] In this manner, the long pin 24 can be inserted into the limiting sleeve 431 (sliding and aligning with the through hole on the bracket 21 via the sliding sleeve 43), thereby enabling the bracket 21-reverse tie rod 22 structure to first tighten the impeller lock position, and then install it onto the push hydraulic cylinder 3 structure, thereby increasing the flexibility of operation.

[0064] In actual operation, multiple limit sleeves 431 can be designed and arranged along the length of the sliding sleeve 43. This can solve the problem that if a limit sleeve 431 breaks or is damaged (the limit sleeve 431 is fixed by welding), the bracket 21 can still be installed and fixed.

[0065] Example 3

[0066] like Figure 1-7 As shown, in this embodiment, based on the structure of embodiment 2, the sliding sleeve 43 is slidably connected to a slide frame structure, and the slide frame structure is fixedly installed on the cylinder of the hydraulic cylinder 3.

[0067] When the piston rod of the hydraulic cylinder 3 is pushed against the main shaft 11 of the water pump, the reverse pushing force pushes the cylinder of the hydraulic cylinder 3 to pull the bracket 21 in the opposite direction.

[0068] Specifically, sliding supports 421 are fixedly connected to the front and rear side walls of the sliding sleeve 43 respectively; the slide structure includes slide rail rods 42 fixedly installed and connected to the sliding supports 421 respectively, and cylinder support 41 is fixedly connected to the cylinder of the pushing hydraulic cylinder 3, with both ends of the cylinder support 41 fixedly installed on the slide rail rods 42 respectively.

[0069] During operation, when the hydraulic cylinder 3 drives the piston rod and the support rod 25 to the end of the main shaft 11 of the large and small water pumps, the cylinder of the hydraulic cylinder 3 moves to the right under the reverse thrust (the water pump is too heavy to move), and pulls the sliding support 421-sliding sleeve 43 structure to the right. The bracket 21 is fixed on the sliding sleeve 43, so the bracket 21 is pulled in the opposite direction. The counter-pull rod 22 on the bracket 21 pulls the impeller 1 to the right. Under the huge pushing and pulling action of the hydraulic cylinder 3, the impeller 1 is disassembled from the main shaft 11 of the water pump.

[0070] In actual operation, the driving force of hydraulic cylinder 3 is selected according to the model of the pump body being disassembled. For example, when disassembling a larger water pump impeller, a hydraulic cylinder 3 with a larger driving force is used. Currently, hydraulic cylinder 3 with a driving force of 500 kg is mostly used on construction sites.

[0071] The slide rail rod 42 is slidably connected to two sides of the support slide 42; a pusher trolley structure is fixedly installed between the bottoms of the support slide 422.

[0072] The trolley structure includes a frame 4, with the bottom of the support slide 422 fixedly mounted on the frame 4; several casters are installed on the bottom of the frame 4. This method enables easy movement of the entire device.

[0073] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A maintenance and disassembly device for a large water pump in a central pump house, comprising an impeller disassembly mechanism for disassembling the impeller of the large water pump; The impeller disassembly mechanism includes a push structure supported on the main shaft of the water pump, characterized in that... It also includes a reverse pulling structure that cooperates with the pushing structure, the reverse pulling structure including a bracket on which a plurality of reverse pulling rods are hinged; The bracket is equipped with several anti-detachment structures that cooperate with the anti-pull rod to prevent the anti-pull rod from detaching from the impeller and springing back when it pulls the impeller.

2. The central pump house large water pump maintenance and disassembly device according to claim 1, characterized in that, The pushing structure includes a pushing hydraulic cylinder, and the piston rod of the pushing hydraulic cylinder is detachably mounted with a support rod that supports the end of the water pump main shaft. A sliding sleeve is slidably connected to the support rod, and the sliding sleeve is fixedly connected to the bracket through an installation structure.

3. The central pump house large water pump maintenance and disassembly device according to claim 2, characterized in that, The longitudinal cross-sectional shape of the bracket is annular; The sliding sleeve is located at the center of the bracket, and the mounting structure includes limiting sleeves that are fixedly connected to the top and bottom of the sliding sleeve respectively; A pair of long pins are slidably connected to the bracket. The long pins pass through the limiting sleeve, and the locking end of the long pin passes through the side wall of the bracket. The locking end of the long pin is threaded with an anti-loosening nut.

4. The central pump house large water pump maintenance and disassembly device according to claim 3, characterized in that, The outer wall of the bracket is welded with several hinge seats, and the inner end of the anti-pull rod is hinged to the hinge seats by a pin.

5. The central pump house large water pump maintenance and disassembly device according to claim 1, characterized in that, The anti-detachment structure includes an adjustment port on the anti-pull rod and an anti-detachment screw welded and fixed to the side wall of the bracket. The anti-detachment screw passes through the adjustment port at an angle, and a spacer nut is threaded to the outer end of the anti-detachment screw.

6. The central pump house large water pump maintenance and disassembly device according to claim 2, characterized in that, The sliding sleeve is slidably connected to a slide frame structure, which is fixedly installed on the cylinder of the hydraulic cylinder. When the piston rod of the hydraulic cylinder pushes against the main shaft of the water pump, the reverse thrust pushes the cylinder barrel of the hydraulic cylinder to pull the support in the direction of the push.

7. The central pump house large water pump maintenance and disassembly device according to claim 6, characterized in that, Sliding supports are fixedly connected to the two side walls of the sliding sleeve respectively; The carriage structure includes slide rails that are fixedly connected to the sliding support, and a cylinder support is fixedly connected to the cylinder of the push hydraulic cylinder, with both ends of the cylinder support fixedly installed on the slide rails.

8. The central pump house large water pump maintenance and disassembly device according to claim 7, characterized in that, Support carriages are slidably connected to both sides of the slide rail rod; A pusher trolley structure is fixedly installed between the bottoms of the support carriage.

9. The central pump house large water pump maintenance and disassembly device according to claim 8, characterized in that, The pusher trolley structure includes a frame, and the bottom of the support carriage is fixedly mounted on the frame; The bottom of the vehicle frame is equipped with several omnidirectional wheels.

10. The central pump house large water pump maintenance and disassembly device according to claim 1, characterized in that, The end of the anti-pull rod is detachably fitted with a claw.

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