Reciprocating brush cleaning device for inner wall of pipe and liquid injection cleaning method of reciprocating brush cleaning device

Abstract

The invention relates to a pipe inner wall reciprocating type brush cleaning device and a liquid injection cleaning method thereof.The pipe inner wall reciprocating type brush cleaning device comprises a brush cylinder, a brush and a flexible shaft, the brush cylinder is horizontally arranged, a flexible shaft sliding seat is arranged at the left end of the brush cylinder, a sealing piece is arranged in the flexible shaft sliding seat, and a pipe connector connected with a pipe fitting in a sealed mode is arranged at the right end of the brush cylinder; a through hole matched with the flexible shaft and the brush to extend out in a guiding manner is formed in the pipe joint; a liquid inlet communicated with the inside and an overflow pipe arranged upwards are arranged on the circumferential surface of the brush cylinder; and the end part of the overflow pipe is open. The liquid injection cleaning method comprises the steps that firstly, the pipe fitting is connected with the pipe joint of the brush cylinder in a sealed mode, and then cleaning liquid is continuously introduced into the liquid inlet of the brush cylinder; the brush is driven by the flexible shaft to enter the pipe fitting for reciprocating scrubbing, the continuously introduced cleaning liquid flows out of the tail end of the pipe fitting when the cleaning liquid is scrubbed along the tail end direction of the pipe fitting along with the brush, and the overflow pipe is in a non-drainage state; when the brush slides in the reset direction, the overflow pipe discharges liquid. The pipe inner wall is efficiently cleaned, the cleaning effect is good, the cost is low, and the service life is long.

Description

Technical Field

[0001] The invention relates to the field of pipe cleaning, and is a pipe inner wall reciprocating brush cleaning device and a liquid injection cleaning method thereof. Background Art

[0002] The existing methods for cleaning the inner wall of pipes include cleaning with cleaning liquid, high-pressure blowing, ball liquid cleaning, abrasive cleaning, brush cleaning, etc. Among them, brush cleaning is a relatively common cleaning method in the existing field of pipe cleaning. For example, the authorization announcement number CN218210972U published in the Chinese patent literature, the authorization announcement date is January 3, 2023, and the name of the invention is "A water-cooled refrigerator condenser copper tube cleaning equipment", which discloses a scheme that uses a motor to drive a flexible shaft, and the flexible shaft drives the brush to move inside the copper tube for cleaning. The advantage of brush cleaning is its simple structure, but the disadvantage is that brush cleaning is often limited by the length of the tube, and the speed of brushing determines the cleaning effect. However, the existing brush cleaning equipment for the inner wall of the pipe must meet both axial transportation and brush rotation, and the cleaning liquid must be introduced, so the overall structure is relatively complex, and it is difficult to achieve high-speed and stable cleaning of the brush. In order to solve this technical problem, the flexible shaft rotation cleaning is changed to axial high-speed brushing, which can effectively improve the cleaning efficiency and cleaning effect. However, when using a brush for axial high-speed reciprocating cleaning, the service life of the brush and the flexible shaft must be considered, and damage to the inner wall of the pipe during high-speed cleaning must also be prevented. Therefore, the inner wall of the pipe needs to be continuously lubricated with cleaning fluid. However, the high-speed brush cleaning solution often does not have the function of the flexible shaft to both transport and supply fluid. Therefore, it is necessary to design a cleaning device that is suitable for axial high-speed brushing. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a pipe inner wall reciprocating brush cleaning device and a liquid injection cleaning method thereof to the art, so as to solve the technical problems of the existing similar pipe inner wall brush cleaning devices, such as the complex cleaning structure, low cleaning efficiency, and difficulty in achieving high-speed reciprocating brushing and liquid injection in the pipe. The purpose is achieved through the following technical solution.

[0004] A reciprocating brush cleaning device for the inner wall of a pipe, the cleaning device comprises a brush barrel, a brush and a flexible shaft, wherein the brush barrel is arranged horizontally; the key points of the structure are that a flexible shaft sliding seat which is slidably matched with the flexible shaft is arranged at the left end of the brush barrel, a sealing member which is slidably sealed with the flexible shaft is arranged in the shaft sliding seat, a pipe joint which is sealedly connected with the pipe to be cleaned is arranged at the right end of the brush barrel, and a through hole which is adapted for the flexible shaft and the brush guide to extend out is arranged in the pipe joint; a liquid inlet which is communicated with the interior and an overflow pipe which is arranged upward are arranged on the circumferential surface of the brush barrel, and the end of the overflow pipe is open. Through the brush barrel, the flexible shaft drives the brush to reliably enter the pipe fitting to form axial brushing. The liquid inlet of the brush barrel continuously supplies liquid to ensure the cleaning and lubrication of the inner wall of the pipe, reduce wear and improve the cleaning effect; the overflow port of the brush barrel helps to balance the pressure in the pipe, that is, when the brush is brushing back and forth at high speed in the pipe, high pressure and negative pressure are easily formed in the pipe. At this time, the overflow pipe can effectively relieve the pressure in the pipe under high pressure and negative pressure. That is, when the brush forms high pressure in the pipe, the cleaning fluid is forced into the overflow pipe, and the overflow pipe is discharged; when the pressure is negative, the vertical overflow pipe liquid storage and the liquid inlet can quickly compensate for the negative pressure in the pipe, and ensure continuous liquid flow in the pipe to the greatest extent, reduce the resistance and wear when the flexible shaft drives the brush to reciprocate at high speed, and improve the service life of the flexible shaft and the brush. At the same time, due to the liquid storage of the overflow pipe, the liquid inlet of the brush barrel does not need to provide a large flow of continuous liquid supply, which effectively saves equipment energy consumption and cleaning liquid costs.

[0005] The flexible shaft sliding seat is provided with an axial hole for slidingly cooperating with the flexible shaft, a sealing cavity is provided at the left end of the axial hole, a sealing ring for slidingly sealing the flexible shaft is provided in the sealing cavity, and an end cap is connected to the outer end of the sealing cavity to limit the sealing ring. Through this structure, the brush cylinder and the flexible shaft sliding part are sealed to reduce unnecessary leakage.

[0006] The middle part of the shaft hole of the flexible shaft sliding seat is provided with an air inlet hole connected to the external air inlet, and the air inlet hole is used to form an airtight seal between the flexible shaft and the shaft hole. Through this structure, the sealing effect between the flexible shaft sliding seat and the flexible shaft is further improved, and by adjusting the air pressure of the air inlet hole, the gas-liquid coordination cleaning of the inner wall of the tube can also be achieved, and the effect is better.

[0007] The right end of the flexible shaft sliding seat is provided with a sliding cavity, and a sliding sleeve for slidingly sleeve-connecting the flexible shaft is provided in the sliding cavity, and a spring is tightly provided between the sliding sleeve and the inner end of the sliding cavity, and the end of the sliding cavity is connected to an annular cover to limit the sliding sleeve in the sliding cavity; a proximity switch is fixedly provided on the circumferential surface of the flexible shaft sliding seat, and the contact of the proximity switch extends into the sliding cavity, and a limiting part is provided at the connection between the brush and the flexible shaft to form a mutually limiting position relative to the end of the sliding sleeve; when the limiting part moves into position with the flexible shaft toward the end of the sliding sleeve, the sliding sleeve compresses the spring until the sliding sleeve contacts the contact of the proximity switch, and the trigger signal of the proximity switch is used as a control signal for the initial position or reset of the flexible shaft. Through this structure, the brush barrel can detect that the brush is in place, and there is a buffer when the brush is reset, thereby improving the service life.

[0008] The two ends of the brush barrel are connected to the flexible shaft sliding seat and the pipe joint in a detachable sealed manner. This structure facilitates the disassembly and maintenance of the brush barrel.

[0009] The cleaning device includes a liquid supply device, which includes a circulation box for storing liquid and a pump. The circulation box is connected to the liquid inlet of the brush barrel through the pump and a pipeline. A flow regulating valve is provided in the pipeline. The overflow pipe of the brush barrel and the end of the pipe to be cleaned are both guided into the circulation box. Through this structure, the recycling of the cleaning liquid is realized, and the cleaning cost is reduced.

[0010] The circulation box is provided with a filtering device for filtering the circulating cleaning liquid. This structure improves the cleaning effect of the cleaning liquid when it is circulated.

[0011] The liquid injection cleaning method of the reciprocating brush cleaning device for the inner wall of the pipe is as follows: first, the pipe to be cleaned is sealed and connected with the pipe joint of the brush cylinder, and then the cleaning liquid is continuously introduced into the liquid inlet of the brush cylinder; next, the brush is driven by the flexible shaft to enter the pipe to form a reciprocating brushing on the inner wall of the pipe, and when the brush brushes along the direction of the end of the pipe, the cleaning liquid continuously introduced into the liquid inlet of the brush cylinder flows out along the end of the pipe, and the overflow pipe is in a non-liquid discharge state; when the brush resets and slides from the end of the pipe toward the brush cylinder, the overflow pipe forms a discharge; and the pipe cleaning is completed in this reciprocating manner.

[0012] When there are 1 to 5 brush reciprocating operations left to complete the cleaning of the pipe fitting, the liquid supply of the liquid inlet of the brush cylinder is closed first, and the remaining 1 to 5 brush reciprocating operations are performed to discharge the remaining cleaning liquid in the pipe fitting from the end of the pipe fitting, thereby realizing the liquid drainage operation on the inner wall of the pipe.

[0013] The overall structure of the present invention is relatively simple, and the soft shaft can drive the brush to brush the inner wall of the pipe back and forth at high speed. It has high cleaning efficiency, good effect, low cost investment, stable and reliable operation, and long service life. It is suitable for use as a brush reciprocating cleaning device and cleaning method for the inner wall of the pipe, or an improvement of similar devices and cleaning methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the implementation structure of the present invention, and the arrows in the figure indicate the flow direction of the cleaning liquid.

[0016] The serial numbers and names in the figure are: 1. flexible shaft, 2. brush, 201. limit part, 3. brush cylinder, 301. liquid inlet, 302. overflow pipe, 4. flexible shaft sliding seat, 401. sealing chamber, 402. sliding chamber, 403. air inlet, 5. sealing ring, 6. end cover, 7. sliding sleeve, 8. spring, 9. ring cover, 10. proximity switch, 11. pipe joint, 12. pipe fitting, 13. flexible shaft conveying device, 14. circulation box, 15. pump, 16. pipeline. Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2 As shown, the reciprocating brush cleaning device for the inner wall of the tube comprises a brush cylinder 3, a brush 2, and a flexible shaft 1. The brush cylinder is horizontally arranged, and the left end of the brush cylinder is provided with a flexible shaft sliding seat 4 which is slidably matched with the flexible shaft, and the shaft sliding seat is provided with a sealing member which is slidably sealed with the flexible shaft, and the right end of the brush cylinder is provided with a pipe joint 11 which is sealedly connected to the pipe 5 to be cleaned, and the pipe joint is provided with a through hole for extending an adaptable flexible shaft and a brush guide; the circumferential surface of the brush cylinder is provided with a liquid inlet 301 which is connected to the inside and an overflow pipe arranged upward, and the end of the overflow pipe is open.

[0019] The flexible shaft sliding seat 4 is provided with an axial hole that slides with the flexible shaft 1, and a sealing cavity 401 is provided at the left end of the axial hole. A sealing ring 5 that forms a sliding seal for the flexible shaft is provided in the sealing cavity, and the outer end of the sealing cavity is threadedly connected to the end cover 6 to limit the sealing ring. An air inlet 403 connected to the external air intake is provided in the middle of the axial hole. When the air inlet is connected to the external air source and high-pressure gas is introduced into the axial hole, an effective air seal is formed between the flexible shaft and the through hole, thereby improving the sealing effect. A sliding cavity 402 is provided at the right end of the flexible shaft sliding seat, and a stepped columnar sliding sleeve 7 that slides and sleeves the flexible shaft is provided in the sliding cavity, and the small cylindrical section of the sliding sleeve is sleeved with a spring and pressed against the inner end of the sliding cavity. The end of the sliding cavity is connected to the annular cover 9 by screws to limit the sliding sleeve in the sliding cavity. A proximity switch 10 is fixedly provided on the circumferential surface of the flexible shaft sliding seat, and the contacts of the proximity switch extend into the sliding cavity. A limiting portion 201 is provided at the connection between the brush and the flexible shaft, which forms a limit relative to the end of the sliding sleeve. That is, when the limiting portion moves into position with the flexible shaft toward the end of the sliding sleeve, it pushes the compression spring of the sliding sleeve until the sliding sleeve contacts the contacts of the proximity switch. The trigger signal of the proximity switch serves as a control signal for the initial position or reset of the flexible shaft. That is, the flexible shaft conveying device can accurately identify the current state of the flexible shaft by receiving the control signal, and control the accurate stroke of the flexible shaft conveying, thereby preventing the flexible shaft from being over-positioned or under-positioned, and ensuring the stability of the brushing work.

[0020] In order to facilitate the installation and maintenance of the brush tube 3, the two ends of the brush tube and the flexible shaft sliding seat 4 and the pipe joint 11 are connected to each other in a detachable sealed manner through the flange ends.

[0021] In addition to the above structure, the cleaning device also includes a liquid supply device, which includes a circulation box for storing liquid and a pump. The circulation box is connected to the liquid inlet of the brush cylinder through the pump and a pipeline. A flow regulating valve is provided in the pipeline. The overflow pipe of the brush cylinder and the end of the pipe to be cleaned are both directed into the circulation box. The circulation box is provided with a filtering device for filtering the circulating cleaning liquid.

[0022] The liquid injection cleaning method of the reciprocating brush cleaning device for the inner wall of the pipe is as follows: first, the pipe fitting 12 to be cleaned is connected to the pipe joint 11 of the brush barrel 3 to form a seal. Then, the liquid inlet 301 of the brush barrel is connected to the external liquid supply device to continuously introduce the cleaning liquid. Next, the external flexible shaft conveying device is turned on, and the flexible shaft drives the brush to enter the pipe fitting to form a reciprocating high-speed brushing, and the brushing speed of the brush in the pipe fitting is 1 to 10 m / s. When the flexible shaft drives the brush to reset, the limit part 201 between the flexible shaft and the brush is against the end of the sliding sleeve 7 in the flexible shaft sliding seat 4, and the sliding sleeve compresses the spring 8 to the point where the sliding sleeve and the contact of the proximity switch 10 are connected, and the proximity switch will trigger a signal to send the flexible shaft conveying device, and the flexible shaft conveying device will identify the current flexible shaft position as the initial position of the brush for the next reciprocating brushing, ensuring the accuracy of each reciprocating stroke of the brush. The specific process of the brush reciprocating in the pipe is as follows: when the brush is scrubbing along the end of the pipe, the cleaning liquid continuously introduced into the liquid inlet of the brush tube flows out along the end of the pipe, and the overflow pipe 302 is in a non-discharging state; when the brush is reset and slid from the end of the pipe toward the brush tube, the overflow tube forms a discharge; the pipe cleaning is completed in this reciprocating manner. Before the cleaning is completed, the liquid supply device is closed first, that is, the liquid supply to the brush tube is stopped, and the flexible shaft drives the brush to perform 1 to 5 reciprocating scrubbing operations, so that the brush discharges the remaining cleaning liquid in the pipe, that is, the cleaning and drainage operations of the pipe are completed. In order to meet the requirements of the cleaning liquid flow rate when cleaning different pipes, the flow control valve in the pipeline of the liquid supply device can be adjusted to achieve the flow adjustment of the liquid inlet of the brush tube, which is more convenient.

[0023] The above contents are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art may make obvious improvements or substitutions to the present invention in combination with existing common knowledge, which also fall within the protection scope of the claims of the present invention.

Claims

1. A reciprocating brush cleaning device for the inner wall of a pipe, the cleaning device comprising a brush cylinder (3), a brush (2), and a flexible shaft (1), wherein the brush cylinder is arranged horizontally; characterized in that The left end of the brush cylinder (3) is provided with a flexible shaft sliding seat (4) that is slidably matched with the flexible shaft (1), and a sealing member that is slidably sealed with the flexible shaft is provided in the flexible shaft sliding seat. The right end of the brush cylinder is provided with a pipe joint (11) that is sealedly connected to a pipe (12) to be cleaned, and a through hole is provided in the pipe joint for fitting the flexible shaft and the brush guide to extend out. The peripheral surface of the brush cylinder is provided with a liquid inlet (301) that is connected to the interior and an overflow pipe (302) that is arranged upward, and the end of the overflow pipe is open.

2. The reciprocating brush cleaning device for the inner wall of a pipe according to claim 1, characterized in that The flexible shaft sliding seat (4) is provided with an axial hole that is slidably matched with the flexible shaft (1), a sealing cavity (401) is provided at the left end of the axial hole, a sealing ring (5) that forms a sliding seal for the flexible shaft is provided in the sealing cavity, and the outer end of the sealing cavity is connected to an end cover (6) to limit the sealing ring.

3. The reciprocating brush cleaning device for the inner wall of a pipe according to claim 2, characterized in that An air inlet hole (403) connected to external air inlet is provided in the middle of the shaft hole of the flexible shaft sliding seat (4), and air is introduced through the air inlet hole to form an airtight seal between the flexible shaft (1) and the shaft hole.

4. The reciprocating brush cleaning device for the inner wall of a pipe according to claim 1, characterized in that A sliding cavity (402) is provided at the right end of the flexible shaft sliding seat (4), a sliding sleeve (7) for slidingly sleeve-engaging the flexible shaft (1) is provided in the sliding cavity, a spring (8) is provided between the sliding sleeve and the inner end of the sliding cavity, and an annular cover (9) is connected to the end of the sliding cavity to limit the sliding sleeve in the sliding cavity; a proximity switch (10) is fixedly provided on the circumferential surface of the flexible shaft sliding seat, the contact of the proximity switch extends into the sliding cavity, and a limiting portion (201) is provided at the connection between the brush (2) and the flexible shaft to form a limiting position relative to the end of the sliding sleeve; when the limiting portion moves into position with the flexible shaft toward the end of the sliding sleeve, the sliding sleeve compresses the spring until the sliding sleeve contacts the contact of the proximity switch, and a trigger signal of the proximity switch serves as a control signal for the initial position or reset of the flexible shaft.

5. The reciprocating brush cleaning device for the inner wall of a pipe according to claim 1, characterized in that The two ends of the brush cylinder (3) are detachably sealedly connected to the flexible shaft sliding seat (4) and the pipe joint (11).

6. The reciprocating brush cleaning device for the inner wall of a pipe according to claim 1, characterized in that The cleaning device comprises a liquid supply device, the liquid supply device comprising a circulation box (14) for storing liquid and a pump (15), the circulation box being connected to a liquid inlet (301) of the brush cylinder (3) via the pump and a pipeline, a flow regulating valve being provided in the pipeline, and the overflow pipe (302) of the brush cylinder and the end of the pipe (12) to be cleaned are both directed into the circulation box.

7. The reciprocating brush cleaning device for the inner wall of a pipe according to claim 6, characterized in that The circulation box (14) is provided with a filtering device for filtering the circulating cleaning liquid.

8. A method for cleaning by liquid injection using a reciprocating brush cleaning device for inner wall of a pipe as claimed in claim 1, characterized in that The cleaning method comprises the following steps: firstly, the pipe fitting (12) to be cleaned is sealedly connected to the pipe joint (11) of the brush cylinder (3); then, the cleaning liquid is continuously introduced into the liquid inlet (301) of the brush cylinder; next, the brush (2) is driven by the flexible shaft (1) to enter the pipe fitting to perform reciprocating brushing on the inner wall of the pipe; when the brush is brushing along the end of the pipe fitting, the cleaning liquid continuously introduced into the liquid inlet of the brush cylinder flows out along the end of the pipe fitting, and the overflow pipe (302) is in a non-liquid discharge state; when the brush is reset and slid from the end of the pipe fitting toward the brush cylinder, the overflow pipe forms a discharge state; and the pipe fitting is cleaned in this reciprocating manner.

9. The cleaning method of the pipe inner wall reciprocating brush cleaning device according to claim 8, characterized in that When the pipe (12) has 1 to 5 reciprocating operations of the brush (2) remaining to complete cleaning, the liquid supply of the liquid inlet (301) of the brush barrel (3) is closed first, and the remaining 1 to 5 reciprocating operations of the brush are performed to discharge the remaining cleaning liquid in the pipe from the end of the pipe, thereby achieving the drainage operation of the inner wall of the pipe.

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