Stranded wire anchoring segment stripping and degreasing device

By designing a stripping and degreasing device for the anchoring section of steel strands, and utilizing the combination of a positioning auxiliary frame and a driving auxiliary roller, the problem of limited contact range caused by the fixing of the spray pipe was solved, achieving efficient dissolution and degreasing of the grease on the surface of the steel strands, and improving the degreasing efficiency and cleaning effect.

CN224295910UActive Publication Date: 2026-05-29GUIZHOU HENGCHUANG CONSTR ENG CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUIZHOU HENGCHUANG CONSTR ENG CO LTD
Filing Date
2025-05-16
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The spray pipe in existing degreasing devices is fixed inside the device, which limits the spray position and range of the degreasing agent. This affects the contact range and dissolution efficiency between the degreasing agent and the surface of the steel strand, thereby reducing the degreasing efficiency.

Method used

A stripping and degreasing device for the anchoring section of steel strand was designed, comprising a liquid storage tank, a stripping auxiliary mechanism, an degreasing auxiliary mechanism, a positioning auxiliary mechanism, and a washing auxiliary mechanism. Through the cooperation of the positioning auxiliary frame and the driving auxiliary roller, the steel strand is ensured to have full contact with the degreasing agent, and multi-angle cleaning is achieved through the sliding of the filter screen frame and the washing roller, thereby improving the contact range and dissolution efficiency.

Benefits of technology

It improves the dissolution and degreasing efficiency of grease on the surface of steel strands, ensuring the positioning and cleaning effects during the stripping process. It is simple and convenient to operate and adaptable to various combined use methods.

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Abstract

The utility model provides a steel strand anchorage segment peeling and oil removing device belongs to oil removing device technical field to solve the problem that the oil removing agent has affected the dissolution efficiency of the oil on the surface of steel strand and the oil removing efficiency of steel strand, including liquid storage tank, the front and rear two end surfaces of liquid storage tank are provided with wire guide groove, the peeling auxiliary mechanism sets up the outside of liquid storage tank front end surface, the cover plate is inserted in the top end surface of liquid storage tank, the filter screen frame is up and down slidingly arranged in the inner end of liquid storage tank, two drive support shafts are rotatably arranged at the lower end of two wire guide grooves, the oil removing auxiliary mechanism is arranged between drive support shaft and filter screen frame, the positioning auxiliary mechanism is arranged in the inside of cover plate, make steel strand and oil removing agent contact fully, increase the contact range of oil removing agent and the surface of steel strand, also improve the dissolution efficiency of oil removing agent to the oil on the surface of steel strand, further improve the oil removing efficiency of steel strand, and the use effect and work efficiency of the device in the actual application process.
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Description

Technical Field

[0001] This utility model belongs to the technical field of degreasing devices, and more specifically, it relates to a stripping and degreasing device for steel strand anchorage sections. Background Technology

[0002] When stripping and degreasing the anchorage section of steel strand, a stripping and degreasing device is often used. During the stripping and degreasing process, a drive roller is often used to drive the steel strand to the inside of the device, or one end of the steel strand is connected to the winding shaft. After stripping the steel strand, a spray pipe is used to spray the degreasing agent onto the surface of the steel strand, and then a cleaning roller is used to achieve the degreasing treatment of the steel strand.

[0003] Based on the above, the spray pipes in existing degreasing devices are mostly fixed inside the device, which limits the spray position and range of the degreasing agent. This not only affects the contact range between the degreasing agent and the surface of the steel strand, but also affects the dissolution efficiency of the degreasing agent on the grease on the surface of the steel strand, as well as the degreasing efficiency of the steel strand. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a stripping and degreasing device for the anchoring section of steel strands. This addresses the issue that in existing degreasing devices, the spray pipes are mostly fixed inside the device, which limits the spraying position and range of the degreasing agent. This not only affects the contact range between the degreasing agent and the surface of the steel strand, but also affects the dissolution efficiency of the degreasing agent on the surface grease of the steel strand, as well as the degreasing efficiency of the steel strand.

[0005] The purpose and effectiveness of this utility model's steel strand anchorage section stripping and degreasing device are achieved through the following specific technical means:

[0006] A stripping and degreasing device for steel strand anchorage sections includes a liquid storage tank, a stripping auxiliary mechanism, a cover plate, a filter screen frame, a drive shaft, a degreasing auxiliary mechanism, a positioning auxiliary mechanism, a washing support box, and a washing auxiliary mechanism. The liquid storage tank has guide grooves on both its front and rear end faces. The stripping auxiliary mechanism is located on the outer side of the front end face of the liquid storage tank. The cover plate is inserted into the top end face of the liquid storage tank. The filter screen frame slides vertically and vertically within the liquid storage tank. There are two drive shafts, each rotatably mounted on one of the two guide shafts. The lower end of the guide channel; the oil removal auxiliary mechanism is located between the drive shaft and the filter screen frame; the oil removal auxiliary mechanism includes: a reciprocating screw, there are two sets of reciprocating screws, the two sets of reciprocating screws are respectively vertically rotatably located on the outer side of the lower end of the two drive shafts; the positioning auxiliary mechanism is located on the inner side of the cover plate; the washing support box is placed behind the liquid storage tank; the upper end of the washing support box is fixedly connected to a water inlet pipe; the outer side of the lower end of the washing support box is fixedly connected to a drain pipe; the washing auxiliary mechanism is located on the inner side of the washing support box.

[0007] Furthermore, the peeling auxiliary mechanism includes: peeling blades, positioning auxiliary frames, and auxiliary inclined plates. There are two peeling blades, which are slidably arranged vertically on the outer side of the front guide groove. There are two positioning auxiliary frames, which are respectively fixedly connected to the outer end faces of the two peeling blades. The positioning auxiliary frames are arc-shaped plate structures. There are two auxiliary inclined plates, which are respectively fixedly connected to the outer side of the front end faces of the two positioning auxiliary frames. The auxiliary inclined plates are arc-shaped plate structures that slope from the right outer side to the inward side.

[0008] Furthermore, guide cylinders are slidably arranged on the front and rear sides above the positioning auxiliary frame, and the outer end of the guide cylinder is fixedly connected to the liquid storage tank; an elastic push rod is elastically connected to the inner side of the guide cylinder; the elastic push rods on the same upper and lower sides are fixedly connected to the positioning auxiliary frame.

[0009] Furthermore, the oil removal auxiliary mechanism also includes: a drive auxiliary roller, resistance-increasing strips, and a bevel gear transmission assembly. There are two drive auxiliary rollers, each coaxially fixedly connected to the outer side of two drive shafts. An arc-shaped groove is formed on the inner side of each drive auxiliary roller, and the outer side of the drive auxiliary roller is flush with the guide groove. There are multiple resistance-increasing strips, evenly arranged and fixedly connected to the outer side of the drive auxiliary rollers. There are two sets of bevel gear transmission assemblies, each set positioned between the front and rear drive shafts on the same side and the reciprocating screw. A transmission auxiliary frame is threaded to the outer end of the reciprocating screw. The transmission auxiliary frame is fixedly connected to the filter screen frame.

[0010] Furthermore, the positioning auxiliary mechanism includes: positioning guide posts, positioning brackets, elastic connectors, and connecting brackets; there are two positioning guide posts, which are slidably connected to the front and rear sides of the cover plate respectively; there are two positioning brackets, which are fixedly connected to the bottom end faces of the two positioning guide posts respectively, and the positioning brackets are arc-shaped frame structures; there are two elastic connectors, which are fixedly connected between the two positioning brackets and the cover plate respectively; the connecting brackets are fixedly connected to the outer side of the top end faces of the two positioning guide posts.

[0011] Furthermore, a shot blasting machine is placed behind the washing support box; a traction roller is rotatably connected to the rear end of the shot blasting machine; the outer end of the traction roller is coaxially and fixedly connected to the outside of the traction motor shaft.

[0012] Furthermore, the washing auxiliary mechanism includes: a water storage tank and a positioning guide frame. The water storage tank is fixedly connected to the upper end of the inner side of the washing support box and is connected to the water inlet pipe. Multiple spray heads are evenly arranged on the outer side of the bottom end face of the water storage tank. There are multiple positioning guide frames, which are arranged front to back and fixedly connected to the inner side of the washing support box. Multiple cleaning auxiliary frames are elastically arranged in a circular array on the upper end of the positioning guide frame. The positions of the cleaning auxiliary frames on the inner side of adjacent positioning guide frames are staggered. A washing roller is rotatably connected to the inner side of the cleaning auxiliary frame. An elastic pressing member is fixedly connected between the cleaning auxiliary frame and the positioning guide frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When this utility model is in use, during the stripping process of steel strands, the positioning auxiliary frame provides positioning assistance for the steel strands, avoiding the displacement of the steel strands during the stripping process. At the same time, it ensures that the positioning auxiliary frame and the stripping knife are always in close contact with the steel strands, guaranteeing the stripping efficiency and positioning effect when stripping the steel strands.

[0015] In use, this invention utilizes the force exerted during the winding of the steel strand to push the filter frame and the steel strand to slide up and down, assisting in the mixing of the degreasing agent inside the storage tank. Simultaneously, it ensures full contact between the steel strand and the degreasing agent, increasing the contact area between the degreasing agent and the surface of the steel strand. This also improves the dissolution efficiency of the degreasing agent on the surface grease of the steel strand, further enhancing the degreasing efficiency of the steel strand and improving the effectiveness and efficiency of the device in practical applications.

[0016] This utility model is simple to operate and convenient to use, improving the cleaning and degreasing effect on steel strands. It can be used in combination with the cleaning mechanism, soaking mechanism and shot blasting mechanism, or it can be used individually. Multiple mechanisms can be flexibly combined to ensure the degreasing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall isometric structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the peeling auxiliary mechanism of this utility model.

[0019] Figure 3 This is a cross-sectional view of the filter screen frame and liquid storage tank installation structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the installation structure of the drive shaft and filter frame of this utility model.

[0021] Figure 5This is a schematic diagram of the installation structure of the drive shaft and reciprocating lead screw of this utility model.

[0022] Figure 6 This is a schematic diagram of the installation structure of the water storage tank and positioning guide frame of this utility model.

[0023] Figure 7 This is a schematic diagram of the connection structure between the positioning guide and the cleaning auxiliary frame of this utility model.

[0024] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0025] 1. Liquid storage tank; 2. Peeling knife; 201. Positioning auxiliary frame; 202. Auxiliary inclined plate; 203. Guide cylinder; 204. Elastic push rod; 3. Cover plate; 4. Filter screen frame; 5. Drive support shaft; 501. Drive auxiliary roller; 502. Resistance increasing strip; 503. Reciprocating screw; 504. Bevel gear transmission assembly; 505. Transmission auxiliary frame; 6. Positioning guide post; 601. Positioning bracket; 602. Elastic connector; 603. Connecting bracket; 7. Shot blasting machine; 8. Washing support box; 801. Water inlet pipe; 802. Drain pipe; 803. Water storage tank; 804. Positioning guide frame; 805. Washing auxiliary frame; 806. Washing roller; 807. Elastic extrusion component. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. Example

[0027] As attached Figures 1-5 As shown:

[0028] This utility model provides a stripping and degreasing device for the anchoring section of steel strand, including a liquid storage tank 1, a stripping auxiliary mechanism, a cover plate 3, a filter screen frame 4, a drive shaft 5, a degreasing auxiliary mechanism, a positioning auxiliary mechanism, a washing support box 8, and a washing auxiliary mechanism. The liquid storage tank 1 has guide grooves on both its front and rear end faces; the stripping auxiliary mechanism is located on the outer side of the front end face of the liquid storage tank 1; the cover plate 3 is inserted into the top end face of the liquid storage tank 1; the filter screen frame 4 is slidably mounted on the inner end of the liquid storage tank 1; there are two drive shafts 5, which are rotatably mounted on two guide grooves. The lower end of the guide groove; the oil removal auxiliary mechanism is set between the drive shaft 5 and the filter screen frame 4; the oil removal auxiliary mechanism includes: a reciprocating screw 503, there are two sets of reciprocating screws 503, the two sets of reciprocating screws 503 are respectively vertically rotated on the outer side of the lower end of the two drive shafts 5; the positioning auxiliary mechanism is set on the inner side of the cover plate 3; the washing support box 8 is placed behind the liquid storage tank 1; the upper end of the washing support box 8 is fixedly connected to the water inlet pipe 801; the lower outer side of the washing support box 8 is fixedly connected to the drain pipe 802; the washing auxiliary mechanism is set on the inner side of the washing support box 8.

[0029] The peeling auxiliary mechanism includes: a peeling knife 2, a positioning auxiliary frame 201, and an auxiliary inclined plate 202. There are two peeling knives 2, which are slidably arranged vertically on the outside of the front guide groove. There are two positioning auxiliary frames 201, which are fixedly connected to the outer end faces of the two peeling knives 2 respectively. The positioning auxiliary frame 201 is an arc-shaped plate structure. There are two auxiliary inclined plates 202, which are fixedly connected to the outer side of the front end face of the two positioning auxiliary frames 201 respectively. The auxiliary inclined plate 202 is an arc-shaped plate structure that is inclined from the right outer side to the inner side.

[0030] Among them, guide cylinders 203 are slidably arranged on the front and rear sides above the positioning auxiliary frame 201, and the outer end of the guide cylinder 203 is fixedly connected to the liquid storage tank 1; an elastic push rod 204 is elastically connected to the inner side of the guide cylinder 203; the elastic push rod 204 on the same side is fixedly connected to the positioning auxiliary frame 201.

[0031] The oil removal auxiliary mechanism also includes: a drive auxiliary roller 501, a resistance-increasing strip 502, and a bevel gear transmission assembly 504. There are two drive auxiliary rollers 501, which are coaxially fixedly connected to the outer sides of two drive shafts 5. The inner side of the drive auxiliary roller 501 is provided with an arc-shaped groove, and the outer side of the drive auxiliary roller 501 is flush with the guide groove. There are multiple resistance-increasing strips 502, which are evenly arranged and fixedly connected to the outer side of the drive auxiliary roller 501. There are two sets of bevel gear transmission assemblies 504, which are respectively set between the drive shafts 5 on the front and rear sides and the reciprocating screw 503. The outer end of the reciprocating screw 503 is threadedly connected to a transmission auxiliary frame 505. The transmission auxiliary frame 505 is fixedly connected to the filter screen frame 4.

[0032] The positioning auxiliary mechanism includes: positioning guide posts 6, positioning brackets 601, elastic connectors 602, and connecting brackets 603; there are two positioning guide posts 6, which are slidably connected to the front and rear sides of the cover plate 3 respectively; there are two positioning brackets 601, which are fixedly connected to the bottom end faces of the two positioning guide posts 6 respectively, and the positioning brackets 601 are arc-shaped frame structures; there are two elastic connectors 602, which are fixedly connected between the two positioning brackets 601 and the cover plate 3 respectively; the connecting brackets 603 are fixedly connected to the outer side of the top end faces of the two positioning guide posts 6.

[0033] Among them, a shot blasting machine 7 is placed behind the washing support box 8; a traction roller is rotatably connected to the rear end of the shot blasting machine 7; the outer end of the traction roller is coaxially fixedly connected to the outside of the traction motor shaft.

[0034] The specific usage and function of this embodiment are as follows:

[0035] In use, the degreasing agent is introduced into the storage tank 1, allowing the steel strand to pass through two guide grooves. One end of the steel strand is fixedly connected to the traction roller. During the winding process, the stripping knife 2 strips the steel strand. During stripping, the positioning auxiliary frame 201 assists in positioning the steel strand, preventing displacement during stripping. The elastic push rod 204 provides compression assistance to the positioning auxiliary frame 201 and the stripping knife 2, ensuring they remain in close contact with the steel strand, guaranteeing stripping efficiency and positioning effect. The steel strand passes through the two guide grooves, and the cover plate 3 is inserted into the storage tank. After the upper end of the liquid tank 1 is reached, the elastic connector 602 pushes the positioning guide post 6 to slide downwards. The positioning bracket 601 then provides positioning assistance for both ends of the steel strand, bringing the steel strand closer to the filter screen frame 4. During the winding process of the steel strand, the frictional force between the steel strand and the drive auxiliary roller 501 during winding causes the drive support shaft 5 to rotate. During the rotation of the drive support shaft 5, the bevel gear transmission assembly 504 drives the reciprocating screw 503 to rotate. During the synchronous rotation of the reciprocating screw 503, the transmission auxiliary frame 505 pushes the filter screen frame 4 and the steel strand to slide up and down. During the up and down sliding of the filter screen frame 4, the mixing assistance of the degreasing agent inside the liquid storage tank 1 is achieved, while also ensuring that the steel strand and the degreasing agent are in full contact. Example

[0036] Based on Example 1, such as Figures 6-7 As shown:

[0037] The washing auxiliary mechanism includes a water tank 803 and a positioning guide 804. The water tank 803 is fixedly connected to the upper end of the inner side of the washing support box 8 and is connected to the water inlet pipe 801. Multiple spray heads are evenly arranged on the outer side of the bottom end face of the water tank 803. There are multiple positioning guides 804, which are arranged front to back and fixedly connected to the inner side of the washing support box 8. Multiple cleaning auxiliary frames 805 are elastically arranged in a circular array on the upper end of the positioning guide 804. The positions of the cleaning auxiliary frames 805 on the inner side of the adjacent positioning guides 804 are staggered. A washing roller 806 is rotatably connected to the inner side of the cleaning auxiliary frame 805. An elastic extrusion member 807 is fixedly connected between the cleaning auxiliary frame 805 and the positioning guide 804.

[0038] The specific usage and function of this embodiment are as follows:

[0039] In use, the steel strand is discharged from the liquid storage tank 1 and enters the washing support box 8. After the water inlet pipe 801 is connected to the water source, the spray head sprays water onto the outside of the steel strand. During the traction of the steel strand, the friction force when the steel strand slides and contacts the washing roller 806 achieves the washing of the steel strand. During the washing process, due to the arrangement of multiple washing rollers 806 and the staggered positions of the inner cleaning auxiliary frame 805 of the adjacent positioning guide frame 804, the surface of the steel strand is washed in multiple directions and angles, ensuring the washing effect of the steel strand.

[0040] The following points should be noted in this article:

[0041] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0042] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0043] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A stripping and degreasing device for steel strand anchorage sections, comprising a liquid storage tank (1), a stripping auxiliary mechanism, a cover plate (3), a filter screen frame (4), a drive shaft (5), a degreasing auxiliary mechanism, a positioning auxiliary mechanism, a washing support box (8), and a washing auxiliary mechanism, wherein the liquid storage tank (1) has guide grooves for the wires at both its front and rear ends; characterized in that: The peeling auxiliary mechanism is located on the outer side of the front end face of the liquid storage tank (1); the cover plate (3) is inserted into the top end face of the liquid storage tank (1); the filter screen frame (4) is slidably arranged at the inner end of the liquid storage tank (1); there are two drive shafts (5), which are respectively rotatably arranged at the lower end of two guide grooves; the oil removal auxiliary mechanism is located between the drive shaft (5) and the filter screen frame (4); the oil removal auxiliary mechanism includes: a reciprocating screw (503), the reciprocating screw... There are two sets of lead screws (503), and the two sets of reciprocating lead screws (503) are respectively vertically rotated and set on the outer side of the lower end of the two drive shafts (5); the positioning auxiliary mechanism is set on the inner side of the cover plate (3); the washing support box (8) is placed behind the liquid storage tank (1); the upper end of the washing support box (8) is fixedly connected to the water inlet pipe (801); the outer side of the lower end of the washing support box (8) is fixedly connected to the drain pipe (802); the washing auxiliary mechanism is set on the inner side of the washing support box (8).

2. The stripping and degreasing device for the anchorage section of steel strand as described in claim 1, characterized in that: The peeling auxiliary mechanism includes: a peeling knife (2), a positioning auxiliary frame (201), and an auxiliary inclined plate (202). There are two peeling knives (2), which are slidably arranged on the outside of the front end guide groove with their upper and lower sides aligned. There are two positioning auxiliary frames (201), which are fixedly connected to the outer end faces of the two peeling knives (2). The positioning auxiliary frame (201) is an arc-shaped plate structure. There are two auxiliary inclined plates (202), which are fixedly connected to the outer side of the front end faces of the two positioning auxiliary frames (201). The auxiliary inclined plate (202) is an arc-shaped plate structure that is inclined from the right outer side to the inner side.

3. The stripping and degreasing device for the anchorage section of steel strand as described in claim 2, characterized in that: Guide cylinders (203) are slidably arranged on the front and rear sides above the positioning auxiliary frame (201). The outer end of the guide cylinder (203) is fixedly connected to the liquid storage tank (1). An elastic push rod (204) is elastically connected to the inner side of the guide cylinder (203). The elastic push rod (204) on the same side is fixedly connected to the positioning auxiliary frame (201).

4. The stripping and degreasing device for the anchorage section of steel strand as described in claim 1, characterized in that: The oil removal auxiliary mechanism further includes: a drive auxiliary roller (501), a resistance-increasing strip (502), and a bevel gear transmission assembly (504). There are two drive auxiliary rollers (501), which are coaxially fixedly connected to the outside of two drive shafts (5). An arc-shaped groove is opened on the inner side of the drive auxiliary roller (501), and the outer side of the drive auxiliary roller (501) is flush with the guide groove. There are multiple resistance-increasing strips (502), which are evenly arranged and fixedly connected to the outside of the drive auxiliary roller (501). There are two sets of bevel gear transmission assemblies (504), which are respectively set between the drive shafts (5) on the front and rear sides and the reciprocating screw (503). The outer end of the reciprocating screw (503) is threadedly connected to a transmission auxiliary frame (505). The transmission auxiliary frame (505) is fixedly connected to the filter screen frame (4).

5. The stripping and degreasing device for the anchorage section of steel strand as described in claim 1, characterized in that: The positioning auxiliary mechanism includes: positioning guide post (6), positioning bracket (601), elastic connector (602), and connecting bracket (603); there are two positioning guide posts (6), which are slidably connected to the front and rear sides of the cover plate (3); there are two positioning brackets (601), which are fixedly connected to the bottom end face of the two positioning guide posts (6), and the positioning brackets (601) are arc-shaped frame structures; there are two elastic connectors (602), which are fixedly connected between the two positioning brackets (601) and the cover plate (3); the connecting bracket (603) is fixedly connected to the outside of the top end face of the two positioning guide posts (6).

6. The stripping and degreasing device for the anchorage section of steel strand as described in claim 1, characterized in that: A shot blasting machine (7) is placed behind the washing support box (8); a traction roller is rotatably connected to the rear end of the shot blasting machine (7); the outer end of the traction roller is coaxially fixedly connected to the outside of the traction motor shaft.

7. The stripping and degreasing device for the anchorage section of steel strand as described in claim 1, characterized in that: The washing auxiliary mechanism includes a water tank (803) and a positioning guide (804). The water tank (803) is fixedly connected to the upper end of the inner side of the washing support box (8), and the water tank (803) is connected to the water inlet pipe (801). Multiple spray heads are evenly arranged on the outer side of the bottom end face of the water tank (803). There are multiple positioning guides (804), which are arranged front to back and fixedly connected to the inner side of the washing support box (8). Multiple cleaning auxiliary frames (805) are elastically arranged in a circular array on the upper end of the positioning guide (804). The positions of the cleaning auxiliary frames (805) on the inner side of the adjacent positioning guides (804) are staggered. A washing roller (806) is rotatably connected to the inner side of the cleaning auxiliary frame (805). An elastic extrusion member (807) is fixedly connected between the cleaning auxiliary frame (805) and the positioning guide (804).