Pipe cleaning device

Abstract

The invention relates to the technical field of pipeline cleaning, and specifically discloses a pipeline cleaning device, comprising a pipe cleaner adapted to the pipeline and a pneumatic component arranged at one end of the pipeline and connected to the pipeline, the pipe cleaner comprising: a front piston and a rear piston, both of which are matched with the pipeline clearance, and a spring is connected between the two, an inflation ring is installed on the front end of the circumferential surface of the front piston, and a rubber ring expanding outward to the rear is installed on the circumferential surface of the rear piston; a connecting structure, comprising a three-way pipeline and a valve component connected to the inflation ring, the air inlet end of the three-way pipeline extending to the rear end surface of the rear piston, if impurities are too firmly attached, the valve component closes the air inlet end and opens the air outlet end, thereby deflation of the inflation ring, causing the inflation ring to retract, and the spring stretches to allow the front piston to pass over the impurities, such a setting can not only clean up the attached impurities, but also reduce the occurrence of blockage when encountering impurities with strong adhesion.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline cleaning, and in particular to a pipeline cleaning device. Background Art

[0002] Powder conveying pipelines are a vital component in modern industrial production, especially in the chemical, food, pharmaceutical and building materials industries. These pipelines usually use pneumatic conveying technology, using compressed air or vacuum pumps to generate airflow to push powder through the pipeline.

[0003] The Chinese patent document with the authorization announcement number CN108246734B discloses a pipeline cleaner for crushing and cleaning pipeline impurities, including an exhaust window, a turbine, a cleaning mechanism, an exhaust pipe, a first spring, a protrusion, a fixing seat, a through hole, a protective cover, a pointed head, a connecting rod, a second spring, a steel wire, an airbag, a connecting sleeve, a material receiving bucket, a filter screen, a base, a motor and a shell. The patent document records: a motor and a turbine are installed inside the shell, the turbine rotates to suck the impurities inside the pipeline into the shell, and then the impurities are filtered by the filter screen so that the impurities fall into the material receiving bucket, the turbine rotates to allow wind to enter the airbag from the inside of the protective cover, so that the steel wire inside the airbag pulls the connecting rod, compresses the second spring at one end of the connecting rod, and at the same time, the gas inside the airbag pushes the piston inside the exhaust pipe to move upward, when the piston rises a certain distance, the exhaust pipe is connected to the airbag, the airbag gas is discharged, and the second spring resets to allow the connecting rod to quickly extend into the pipeline, crushing the large impurities inside the pipeline, thereby increasing the speed of cleaning impurities.

[0004] During the use of pipelines, impurities in the transported gas, liquid or fluid with solid particles adhere to the inner wall of the pipeline, affecting the speed of the transported object. When cleaning, a pipe cleaner is inserted into the pipeline, and pressurized gas is applied behind the pipe cleaner to push the pipe cleaner forward. The pipe cleaner pushes the impurities out of the pipeline to clean the pipeline. When the pipe cleaner reaches the place where the impurities are more firmly attached in the pipeline, the pressure of the compressed gas may not be enough to overcome the resistance of the impurities, and the pipe cleaner is prone to getting stuck and cannot continue to push the impurities out of the pipeline. Summary of the invention

[0005] The invention provides a pipeline cleaning device, aiming to solve the problem that the cleaner in the related art is prone to getting stuck.

[0006] A pipeline cleaning device includes a pipeline cleaning device adapted to a pipeline and a pneumatic component arranged at one end of the pipeline and connected to the pipeline, wherein the pipeline cleaning device includes:

[0007] The front piston and the rear piston are both matched with the pipeline clearance, and a spring is connected between the two. An inflation ring is installed on the front end of the circumferential surface of the front piston, and a rubber ring expanding outward to the rear is installed on the circumferential surface of the rear piston;

[0008] The communication structure includes a three-way pipe and a valve assembly connected to the inflation ring, wherein the air inlet end of the three-way pipe extends to the rear end surface of the rear piston, and the air outlet end extends to the front end surface of the front piston. In the initial state, the valve assembly closes the air outlet end and opens the air inlet end. When the rear piston compresses the spring to the limit, the valve assembly closes the air inlet end and opens the air outlet end.

[0009] The scraper assembly comprises a rotating ring rotatably mounted on the front piston and a plurality of scrapers arranged in a circumferential array about the front piston axis, wherein the scrapers are slidably mounted on the rotating ring;

[0010] The driving assembly is installed between the front piston and the rear piston. When the rear piston approaches the front piston, the scraper blade contacts the inner wall of the pipe and drives the scraper to rotate.

[0011] The effect is: when the inflatable ring contacts the impurities agglomerated on the pipeline, the movement of the inflatable ring is blocked, and the rear piston moves close to the front piston, so that the driving assembly drives the scraping assembly to rotate, thereby scraping off the impurities attached to the inner wall of the pipeline at the front end of the inflatable ring; if the impurities are too firmly attached and the spring is compressed to its limit, the valve assembly closes the air inlet end and opens the air outlet end, thereby deflation of the inflatable ring, causing the inflatable ring to retract and no longer contact the impurities; then the spring stretches to cause the front piston to pass over the impurities; as the rubber ring expands outward to the rear, the rubber ring retracts to pass over the impurities; this arrangement can not only clean up the attached impurities, but also reduce the occurrence of blockages when encountering impurities with strong adhesion.

[0012] Preferably, the three-way pipe includes a connecting pipe, an air inlet pipe and an air outlet pipe that are interconnected. The connecting pipe is connected to the inflation ring. The air inlet pipe and the air outlet pipe extend to the rear end face of the rear piston and the front end face of the front piston, respectively. In the initial state, the inflation ring is inflated through the air inlet pipe. When impurities are too firmly attached, the inflation ring is exhausted through the air outlet pipe, thereby allowing it to pass over the impurities.

[0013] Preferably, the valve assembly includes a valve plate slidably installed in the front piston, a connecting hole is opened in the middle of the valve plate, the valve plate crosses the air inlet pipe and the air outlet pipe of the three-way pipe, and a spring push rod that can be pushed by the rear piston is installed at the rear end of the valve plate. When the rear piston compresses the spring to the limit, the spring presses against the rear end of the spring push rod, so that the connecting hole on the valve plate switches from connecting with the air inlet pipe to connecting with the air outlet pipe.

[0014] Preferably, the driving assembly includes a driving unit and a damping bearing, the outer ring of the damping bearing is fixedly connected to a connecting seat, a connecting rod is hinged between the connecting seat and the scraper, the output end of the driving unit is connected to the inner ring of the damping bearing, and is driven by the damping bearing. There is a large damping force between the inner and outer rings of the damping bearing, so the outer ring of the damping bearing rotates to cause the connecting rod to push the scraper until the scraper contacts the inner wall of the pipe, and at the same time the scraper and the rotating ring rotate around the axis of the rotating ring.

[0015] Preferably, a through hole extending from front to back is provided at the axis of the front piston, and the driving unit comprises: a spiral rod fixedly connected to the center of the front end of the rear piston, and an insertion rod connected to the center of the connecting seat, and a driving hole matching the spiral rod is provided on the insertion rod, and the spiral rod is engaged with the driving hole.

[0016] Preferably, a one-way bearing is connected between the inner ring of the damping bearing and the insertion rod. When the rear piston approaches the front piston, the insertion rod drives the connecting seat to rotate through the one-way bearing. When the inflation ring retracts, the spring stretches to make the front piston pass over the impurities. The spiral rod drives the insertion rod to rotate in the opposite direction. The insertion rod drives the outer ring of the one-way bearing to rotate relative to the inner ring, thereby not driving the scraper assembly to rotate in the opposite direction, thereby avoiding reducing the spring rebound speed.

[0017] Preferably, an elastic band is connected between the scrapers to ensure that there is a gap between the blade of the scraper and the inner wall of the pipe in an initial state.

[0018] Preferably, a telescopic cylinder is installed between the front piston and the rear piston, and a accommodating space for accommodating impurities is formed inside the telescopic cylinder to prevent impurities from accumulating at the front end of the front piston and increasing the resistance to the front piston's advancement.

[0019] Preferably, the scraper is provided with a material guide strip, and a spiral blade is fixedly provided in the inner hole of the rotating ring, and the spiral blade extends to the rear end of the front piston. The scraper rotates so that impurities on the scraper enter the inner hole of the rotating ring through the material guide strip, and then the impurities are pushed by the spiral blade through the inner hole of the front piston into the telescopic cylinder.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are:

[0021] When the air pressure component pressurizes the pipeline, the valve component closes the air outlet end and opens the air inlet end. The gas at the rear end inflates the inflation ring through the air inlet of the three-way pipeline, so that the inflation ring expands and presses against the inner wall of the pipeline. Then the pipe cleaner moves forward to push the impurities in the pipeline to the other end of the pipeline, thereby cleaning the impurities in the pipeline. When the inflation ring hits the impurities agglomerated on the pipeline, the movement of the inflation ring is blocked, and the rear piston moves close to the front piston, so that the drive component drives the scraper component to rotate, thereby scraping off the impurities attached to the inner wall of the pipeline at the front end of the inflation ring. If the impurities are too firmly attached and the spring is compressed to the limit, the valve assembly closes the air inlet end and opens the air outlet end, thereby deflating the inflation ring, so that the inflation ring retracts and no longer presses against the impurities. Then the spring stretches to make the front piston pass over the impurities. Since the rubber ring expands outward to the rear, the rubber ring retracts to pass over the impurities. This arrangement can not only clean up the attached impurities, but also reduce the occurrence of blockage when encountering impurities with strong adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the pipe cleaning device in the present invention.

[0023] Figure 2 It is a structural schematic diagram of the pipe cleaning device in the present invention from another perspective.

[0024] Figure 3 It is a schematic diagram of the structure of the pipe cleaning device of the present invention when it is placed in the pipeline.

[0025] Figure 4 It is a schematic diagram of the explosion structure of the pipe cleaning device in the present invention.

[0026] Figure 5 It is a cross-sectional view of the pipe cleaning device in the present invention.

[0027] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0028] Figure 7 It is a schematic structural diagram of the scraper assembly in the present invention.

[0029] Reference numerals:

[0030] 1. Front piston; 11. Inflatable ring; 12. Spring; 13. Telescopic cylinder; 2. Rear piston; 21. Rubber ring; 22. Round cover; 3. Three-way pipe; 31. Connecting pipe; 32. Inlet pipe; 33. Outlet pipe; 4. Valve assembly; 41. Valve plate; 42. Spring push rod; 5. Scraper assembly; 51. Elastic belt; 52. Rotating ring; 521. Spiral blade; 53. Scraper; 531. Guide strip; 6. Drive assembly; 61. Connecting seat; 62. One-way bearing; 63. Drive unit; 631. Spiral rod; 632. Insert rod; 64. Damping bearing. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1-Figure 3 As shown, a pipeline cleaning device includes a pipe cleaner adapted to the pipeline and a pneumatic component (such as an air compressor, not shown in the figure) arranged at one end of the pipeline and connected to the pipeline. When in use, the pipe cleaner is inserted into one end of the pipeline, and then the air outlet of the pneumatic component is connected to the pipeline, so as to increase the pressure of the pipeline. The pressures at both ends of the pipe cleaner are different, so that the pipe cleaner moves in the pipeline, pushing the powdery impurities to the other end of the pipeline.

[0033] like Figure 1-Figure 5 As shown, the pipe cleaner comprises: a front piston 1, a rear piston 2, a three-way pipe 3, a valve assembly 4, a scraper assembly 5 and a drive assembly 6. The front piston 1 and the rear piston 2 are both matched with the pipe clearance, and a spring 12 is connected between the two. A through hole that passes through the front and back is opened at the axis of the front piston 1. An inflatable ring 11 is installed on the front end of the circumferential surface of the front piston 1. The scraper assembly 5 is installed on the front end surface of the front piston 1. A rubber ring 21 that expands outward to the rear is installed on the circumferential surface of the rear piston 2. The air inlet end of the three-way pipe 3 extends to the rear end surface of the rear piston 2, and the air outlet end extends to the front end surface of the front piston 1. When the air pressure assembly pressurizes the pipeline, the valve assembly 4 closes the air outlet end and opens the air inlet end. The gas at the rear end inflates the inflatable ring 11 through the air inlet of the three-way pipe 3, so that the inflatable ring 11 expands against the inner wall of the pipeline. Then the pipe cleaner moves forward to push the impurities in the pipeline to the other end of the pipeline, thereby cleaning the impurities in the pipeline.

[0034] When the inflatable ring 11 is against the impurities attached to the pipeline, the movement of the inflatable ring 11 is blocked, and the rear piston 2 moves close to the front piston 1, so that the drive assembly 6 drives the scraper assembly 5 to rotate, thereby scraping off the impurities attached to the inner wall of the pipeline at the front end of the inflatable ring 11. If the impurities are too firmly attached and the spring 12 is compressed to the limit, the valve assembly 4 closes the air inlet end and opens the air outlet end, thereby deflating the inflatable ring 11, so that the inflatable ring 11 retracts and no longer presses against the impurities. Then the spring 12 stretches to make the front piston 1 pass over the impurities. Since the rubber ring 21 expands outward to the rear, the rubber ring 21 retracts to pass over the impurities. This arrangement can not only clean up the attached impurities, but also reduce the occurrence of blockage when encountering impurities with strong adhesion. When encountering such impurities that cannot be cleaned, after cleaning the pipe with a pipe cleaner, a mixture of water and cleaning liquid is passed into the pipe for soaking, and then rinsed with water.

[0035] like Figure 1-Figure 6As shown, the three-way pipeline 3 includes a connecting pipe 31, an air intake pipe 32 and an air outlet pipe 33 which are interconnected. The connecting pipe 31 is located in the front piston 1 and is connected to the inflation ring 11. The air intake pipe 32 and the air outlet pipe 33 extend to the rear end face of the rear piston 2 and the front end face of the front piston 1 respectively.

[0036] The valve assembly 4 includes a valve plate 41 and a spring push rod 42 slidably installed in the front piston 1. A connecting hole is opened in the middle of the valve plate 41. The valve plate 41 crosses the air inlet pipe 32 and the air outlet pipe 33 of the three-way pipe 3. The rear end of the valve plate 41 is connected to the spring push rod 42. When the rear piston 2 compresses the spring 12 to the limit, the spring 12 presses against one end of the spring push rod 42, thereby pushing the spring push rod 42, so that the connecting hole on the valve plate 41 switches from connecting with the air inlet pipe 32 to connecting with the air outlet pipe 33.

[0037] like Figure 4-Figure 7 As shown, the scraper assembly 5 comprises an elastic band 51, a rotating ring 52 rotatably mounted on the front piston 1, and a plurality of scrapers 53 arranged in a circular array with the axis of the front piston 1, wherein the scrapers 53 are slidably mounted on the rotating ring 52, and the scrapers 53 are provided with rope threading holes, and the elastic band 51 passes through all the rope threading holes in sequence and is connected end to end, so as to allow a gap between the blade of the scraper 53 and the inner wall of the pipe in the initial state;

[0038] The driving assembly 6 includes: a connecting seat 61, a one-way bearing 62, a driving unit 63 and a damping bearing 64;

[0039] The driving unit 63 includes: a spiral rod 631 fixedly connected to the center of the front end of the rear piston 2, and an insert rod 632 connected to the outer ring of the one-way bearing 62;

[0040] The insert rod 632 is provided with a driving hole adapted to the spiral rod 631, the spiral rod 631 is meshed with the driving hole, the inner ring of the outer ring of the one-way bearing 62 is connected to the inner ring of the damping bearing 64, the outer ring of the damping bearing 64 is fixedly connected to the connecting seat 61, and a connecting rod is hinged between the connecting seat 61 and the scraper 53;

[0041] When the rear piston 2 moves close to the front piston 1, the spiral rod 631 drives the plunger 632 to rotate, and the plunger 632 drives the one-way bearing 62 and the inner ring of the damping bearing 64 to rotate. Since there is a large damping force between the inner and outer rings of the damping bearing 64, the outer ring of the damping bearing 64 rotates to make the connecting rod push the scraper 53, and the scraper 53 overcomes the elastic force of the elastic band 51 to move until the scraper 53 contacts the inner wall of the pipe. At the same time, the scraper 53 and the rotating ring 52 rotate around the axis of the rotating ring 52, so that the scraper 53 scrapes off the impurities. When the plunger 632 does not rotate, the elastic band 51 contracts to make the scraper 53 slowly retract, and the outer ring of the damping bearing 64 rotates relative to the inner ring. When encountering impurities with strong adhesion, the scraper 53 is pressed by the impurities and cannot scrape off the impurities. The inner and outer rings of the damping bearing 64 rotate relatively, thereby preventing the spiral rod 631 and the plunger 632 from continuing to rotate relative to each other.

[0042] When the inflation ring 11 retracts and the spring 12 stretches to allow the front piston 1 to pass over the impurities, the spiral rod 631 drives the insertion rod 632 to rotate in the opposite direction, and the insertion rod 632 drives the outer ring of the one-way bearing 62 to rotate relative to the inner ring, thereby not driving the scraper assembly 5 to rotate in the opposite direction, avoiding reducing the rebound speed of the spring 12, thereby making the front piston 1 move at a faster speed, so that the front piston 1 has a greater impact force on the impurities in front.

[0043] like Figure 4-Figure 7 As shown, in order to prevent impurities from accumulating at the front end of the front piston 1 and increasing the resistance to the front piston 1 moving forward, the scraper 53 is provided with a guide strip 531 extending obliquely toward the inner hole of the front piston 1, and a spiral leaf 521 is fixedly provided in the inner hole of the rotating ring 52, and the spiral leaf 521 extends to the rear end of the front piston 1 and is in contact with the inner hole of the front piston 1. A telescopic cylinder 13 is installed between the front piston 1 and the rear piston 2, and a accommodating space for accommodating impurities is formed in the telescopic cylinder 13. A channel connected to the accommodating space is opened at the axis of the rear piston 2, and a round cover 22 is screwed on the rear end of the channel. The scraper 53 rotates to make the impurities on the scraper 53 enter the inner hole of the rotating ring 52 through the guide strip 531, and then the impurities are pushed by the spiral leaf 521 through the inner hole of the front piston 1 into the telescopic cylinder 13. When the pipe cleaner goes out from the other end of the pipeline, the round cover 22 can be unscrewed to pour out the impurities in the telescopic cylinder 13.

[0044] If the impurities are sticky, in order to prevent the impurities from adhering to the spiral rod 631 and the insertion rod 632 and affecting the movement, a telescopic sleeve (not shown in the figure) is connected between the front end of the rear piston 2 and the connecting seat 61, and one end of the telescopic sleeve is rotatably connected to the rear piston 2 or the connecting seat 61, and the spiral rod 631 and the insertion rod 632 are located in the telescopic sleeve.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pipeline cleaning device, comprising a pipeline cleaning device adapted to the pipeline and a pneumatic component arranged at one end of the pipeline and connected to the pipeline, characterized in that: The pipe cleaning device comprises: The front piston and the rear piston are both matched with the pipeline clearance, and a spring is connected between the two. An inflation ring is installed on the front end of the circumferential surface of the front piston, and a rubber ring expanding outward to the rear is installed on the circumferential surface of the rear piston; The communication structure includes a three-way pipe and a valve assembly connected to the inflation ring, wherein the air inlet end of the three-way pipe extends to the rear end surface of the rear piston, and the air outlet end extends to the front end surface of the front piston. In the initial state, the valve assembly closes the air outlet end and opens the air inlet end. When the rear piston compresses the spring to the limit, the valve assembly closes the air inlet end and opens the air outlet end. The scraper assembly comprises a rotating ring rotatably mounted on the front piston and a plurality of scrapers arranged in a circumferential array about the front piston axis, wherein the scrapers are slidably mounted on the rotating ring; A driving assembly is installed between the front piston and the rear piston. When the rear piston approaches the front piston, the scraper blade contacts the inner wall of the pipe and drives the scraper to rotate; The three-way pipeline includes a connecting pipe, an air inlet pipeline and an air outlet pipeline which are connected to each other. The connecting pipe is connected to the inflation ring. The air inlet pipeline and the air outlet pipeline extend to the rear end surface of the rear piston and the front end surface of the front piston respectively. The valve assembly includes a valve plate slidably installed in the front piston, a connecting hole is opened in the middle of the valve plate, the valve plate crosses the air inlet pipe and the air outlet pipe of the three-way pipe, and a spring push rod that can be pushed by the rear piston is installed at the rear end of the valve plate. When the rear piston compresses the spring to the limit, the spring presses against the rear end of the spring push rod, so that the connecting hole on the valve plate switches from connecting with the air inlet pipe to connecting with the air outlet pipe.

2. The pipeline cleaning device according to claim 1, characterized in that: The driving assembly includes a driving unit and a damping bearing. The outer ring of the damping bearing is fixedly connected to a connecting seat. A connecting rod is hinged between the connecting seat and the scraper. The output end of the driving unit is connected to the inner ring of the damping bearing.

3. The pipeline cleaning device according to claim 2, characterized in that: A through hole extending from front to back is provided at the axis of the front piston, and the driving unit includes: a spiral rod fixedly connected to the center of the front end of the rear piston, and an insertion rod connected to the center of the connecting seat, and a driving hole matching the spiral rod is provided on the insertion rod, and the spiral rod is engaged with the driving hole.

4. The pipeline cleaning device according to claim 3, characterized in that: A one-way bearing is connected between the inner ring of the damping bearing and the insertion rod. When the rear piston approaches the front piston, the insertion rod drives the connecting seat to rotate through the one-way bearing.

5. The pipeline cleaning device according to claim 4, characterized in that: An elastic band is connected between the scrapers to ensure that there is a gap between the blade of the scraper and the inner wall of the pipe in an initial state.

6. The pipeline cleaning device according to any one of claims 1 to 5, characterized in that: A telescopic cylinder is installed between the front piston and the rear piston, and a holding space for holding impurities is formed in the telescopic cylinder.

7. The pipeline cleaning device according to claim 6, characterized in that: The scraper is provided with a material guide strip, and the inner hole of the rotating ring is fixedly provided with a spiral blade, which extends to the rear end of the front piston.

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