A centrifugal pump repair device

Abstract

The utility model relates to centrifugal pump maintenance tool field, concretely is a centrifugal pump maintenance device. A kind of centrifugal pump maintenance device, it includes sleeve, screw rod and clamping part, the outside of the sleeve is provided with anti-rotation rod, the screw rod passes through the screw rod seat of sleeve rear end, the clamping part includes the clamping jaw of being arranged in sleeve front end, clamping jaw sleeve, spring and locating bead, the clamping jaw is located in clamping jaw sleeve, and the top of clamping jaw and clamping jaw sleeve are connected by spring, the locating bead is arranged on clamping jaw, and the limiting through-hole corresponding with locating bead is provided on clamping jaw sleeve. The utility model is easy to operate, and the design of locating screw guarantees the coaxial of sleeve and shaft, operation is more accurate and convenient. The design of anti-rotation limiting plate liberates the hand of operator, for large centrifugal pump, single person can also complete operation.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump repair tools, specifically a centrifugal pump repair device. Background Technology

[0002] Centrifugal pump shaft sleeves require regular inspection and are components that need frequent replacement and maintenance. Currently, the most common method for disassembling shaft sleeves is using a pry bar, where workers manually tap the pry bar with a hammer to slowly knock the sleeve off. This method is time-consuming and labor-intensive. Chinese utility model patent CN210132454U discloses a device for disassembling centrifugal pump shaft sleeves. It uses a sleeve, a lead screw, and an auxiliary component to achieve shaft sleeve disassembly. However, adjusting the auxiliary component is inconvenient, and the handle needs to be held during operation to prevent the sleeve from rotating. While it's feasible for a single person to hold the handle with one hand and operate the lead screw with the other for small centrifugal pumps, it's quite strenuous for one person to operate the lead screw with one hand for large centrifugal pumps, especially since the other hand also needs to support the handle.

[0003] Therefore, we need to design a more convenient shaft sleeve removal device for centrifugal pump maintenance. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a centrifugal pump maintenance device that facilitates the locking operation of the front end of the bushing.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A centrifugal pump repair device includes a sleeve, a lead screw, and a clamping part. An anti-rotation rod is provided on the outer side of the sleeve. The lead screw passes through a lead screw seat at the rear end of the sleeve. The clamping part includes a pawl, a pawl sleeve, a spring, and a positioning bead provided at the front end of the sleeve. The pawl is located inside the pawl sleeve, and the top of the pawl and the pawl sleeve are connected by a spring. The positioning bead is provided on the pawl, and a limiting through hole corresponding to the positioning bead is provided on the pawl sleeve.

[0007] Furthermore, there are three clamping parts, which are arranged at equal intervals around the front end of the sleeve.

[0008] Furthermore, the rear end of the lead screw is provided with a square head, and the square head is provided with an auxiliary operating rod hole.

[0009] Furthermore, a positioning screw is radially provided at the front end of the sleeve, and the front end of the positioning screw passes through the wall of the sleeve and is located inside the sleeve.

[0010] Furthermore, it also includes an anti-rotation limiting plate, which is provided with a sliding groove and a foot pedal. When the anti-rotation rod is vertically downward, the lower end of the anti-rotation rod is located in the sliding groove.

[0011] Furthermore, the anti-rotation rod is a telescopic rod.

[0012] The beneficial effects of this utility model are:

[0013] Its clamping part is designed with claws; pressing the positioning bead during use locks the sleeve in place, making operation convenient. The positioning screw design ensures coaxiality between the sleeve and the shaft, resulting in more precise and convenient operation. The anti-rotation limit plate design frees the operator's hands, allowing even a single person to operate large centrifugal pumps. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention in use.

[0016] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle;

[0017] In the figure, there are: sleeve 1, lead screw seat 101, lead screw 2, clamping part 3, pawl 301, pawl sleeve 302, limiting through hole 3021, spring 303, positioning bead 304, anti-rotation rod 4, square head 401, auxiliary operation rod hole 402, positioning screw 5, anti-rotation limiting plate 6, slide groove 601, foot pedal part 602, bushing 7, and shaft 8. Detailed Implementation

[0018] To better understand this utility model, the following description is in conjunction with the appendix. Figure 1-3 The embodiments of this utility model will be explained in detail below.

[0019] This utility model discloses a centrifugal pump repair device comprising a sleeve 1, a lead screw 2, and a clamping part 3. The sleeve has an open front end. An anti-rotation rod 4 is fixedly connected (weldable) to the outer side of the sleeve 1. The function of the anti-rotation rod 4 is to keep the sleeve 1 stationary when the lead screw 2 is rotated. The lead screw 2 passes through a lead screw seat 101 at the rear end of the sleeve 1 (the rear end of the sleeve 1 is thickened and has a threaded hole in the middle for mate with the lead screw). The front end of the lead screw 2 is designed with a pointed tip, corresponding to the positioning groove at the center of the rear end of the centrifugal pump shaft.

[0020] The clamping part 3 includes a jaw 301, a jaw sleeve 302, a spring 303, and a positioning bead 304 disposed at the front end of the sleeve. A through hole corresponding to the opening of the jaw sleeve 302 is formed on the sleeve, and the jaw sleeve 302 is welded to the outer surface of the sleeve 1. The jaw 301 is located inside the jaw sleeve 302, and the top of the jaw 301 and the jaw sleeve 302 are connected by the spring 303. Under the force of the spring 303, the jaw 301 can extend out of the jaw sleeve 302 and be positioned inside the sleeve. The positioning bead 304 is disposed on the jaw 301, and a limiting through hole 3021 corresponding to the positioning bead 304 is provided on the jaw sleeve 302. The positioning bead 304 can be a conventional ball screw, and a spring is disposed behind the steel ball of the positioning bead. Preferably, there are three clamping parts 3, which are evenly spaced circumferentially at the front end of the sleeve 1.

[0021] For ease of operation, a square head 401 is provided at the rear end of the lead screw 2, and an auxiliary operating rod hole 402 is provided on the square head 401. During operation, the square head 401 can be held with a wrench, or the lead screw 2 can be rotated after inserting an auxiliary rod into the auxiliary operating rod hole 402.

[0022] When installing sleeve 1, because the diameter of the sleeve is larger than the diameter of the centrifugal pump shaft 8, the front end of sleeve 1 will fall, causing excessive deviation between sleeve 1 and the centrifugal pump shaft. Therefore, in order to avoid excessive deviation between the axes of the two causing uneven force on the chuck, a positioning screw 5 is radially provided at the front end of sleeve 1. The front end of the positioning screw 5 passes through the wall of sleeve 1 and is located inside sleeve 1. In use, by screwing the positioning screw 5, the bottom of the positioning screw 5 rests on the bushing 7, thereby adjusting the distance between sleeve 1 and centrifugal pump shaft 8.

[0023] To enable single-person operation when disassembling the shaft sleeve of a large centrifugal pump, this invention also incorporates an anti-rotation limiting plate 6. The anti-rotation limiting plate 6 is equipped with a sliding groove 601 and a foot pedal 602, and a rubber anti-slip layer can be further provided at the bottom. When the anti-rotation rod 4 is vertically downward, its lower end is located within the sliding groove 601. In use, the anti-rotation limiting plate 6 is placed on the ground, parallel to the centrifugal pump shaft. During operation, the foot pedal 602 is stepped on, and the anti-rotation rod 4 moves along the sliding groove 601. To accommodate centrifugal pumps of different sizes, the anti-rotation rod 4 is designed as a telescopic rod, achieving extension and retraction through a threaded connection.

[0024] In use, press the extended claw 301 into the claw sleeve 302 by hand. At this time, the positioning bead 304 falls into the limiting through hole 3021, completing the limiting. According to the diameter of the bushing 7 and the sleeve 1, roughly adjust the length of the positioning screw 5 extending into the sleeve 1, then put the sleeve 1 onto the shaft 8, press down the positioning bead 304, the positioning bead 304 separates from the limiting through hole 3021, and under the action of the spring 303, the claw 301 pops out. Adjust the lead screw 2 so that its front end is in the positioning groove at the center of the rear end of the shaft 8, and then fine-tune the positioning screw 5. Place the anti-rotation limiting plate 6 on the ground, making it parallel to the shaft 8, and then adjust the length of the anti-rotation rod 4 so that its bottom falls into the sliding groove 601. Select a wrench or auxiliary rod to operate the lead screw 2 to pull out the bushing 7.

[0025] It should be noted that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A centrifugal pump maintenance device, comprising a sleeve, a lead screw, and a clamping part, wherein an anti-rotation rod is provided on the outer side of the sleeve, and the lead screw passes through a lead screw seat at the rear end of the sleeve, characterized in that: The clamping part includes a jaw, a jaw sleeve, a spring, and a positioning bead disposed at the front end of the sleeve. The jaw is located inside the jaw sleeve, and the top of the jaw and the jaw sleeve are connected by a spring. The positioning bead is disposed on the jaw, and a limiting through hole corresponding to the positioning bead is provided on the jaw sleeve.

2. The centrifugal pump repair device as described in claim 1, characterized in that: There are three clamping parts, which are arranged at equal intervals around the front end of the sleeve.

3. A centrifugal pump repair device as described in claim 1, characterized in that: The rear end of the lead screw is provided with a square head, and the square head is provided with an auxiliary operating rod hole.

4. A centrifugal pump repair device as described in claim 1, characterized in that: A positioning screw is radially provided at the front end of the sleeve, and the front end of the positioning screw passes through the wall of the sleeve and is located inside the sleeve.

5. A centrifugal pump repair device as described in claim 1, characterized in that: It also includes an anti-rotation limiting plate, which is provided with a sliding groove and a foot pedal. When the anti-rotation rod is vertically downward, the lower end of the anti-rotation rod is located in the sliding groove.

6. A centrifugal pump repair device as described in claim 5, characterized in that: The anti-rotation rod is a telescopic rod.

Images