Air bag type pipe cleaning device for oil separation tank

Abstract

The air bag type pipe cleaning device comprises a front pipe joint, a rear pipe joint is sleeved with the front pipe joint, the front pipe joint and the rear pipe joint are connected in a sliding mode, the air bag type pipe cleaning device is further provided with a flexible expansion cover wrapping the outer sides of the front pipe joint and the rear pipe joint, one end of the expansion cover is connected to the front end of the front pipe joint, and the other end of the expansion cover is connected to the rear end of the rear pipe joint. A plurality of air holes are formed in the side wall of the rear end of the rear pipe joint in the circumferential direction, the rear end of the rear pipe joint is connected with an outer sleeve, a central pipe is arranged on the inner side of the front end of the front pipe joint, the rear end of the central pipe penetrates through the rear pipe joint and the outer sleeve, a clamping cavity is formed between the central pipe and the outer sleeve, the clamping cavity is ventilated to enable the expansion cover to expand, and the problem that a common dredger is small in dredging sectional area is solved.

Description

Technical Field

[0001] This invention relates to the field of agricultural wastewater treatment, and in particular to a pneumatic pigging device for grease traps. Background Technology

[0002] When treating agricultural wastewater, the branch pipes downstream of the grease trap often contain a lot of oil and debris. Ordinary drain cleaners, such as long steel wires inserted into the pipes, have a small cross-sectional area, resulting in low efficiency and poor effectiveness. Another method is to use air to push the blockage away through the pipe; however, excessive air pressure can easily cause the pipe to rupture.

[0003] One existing solution involves attaching an airbag to the front end of the trachea. A flexible control rod pushes the airbag downwards, and due to its large cross-section, the pull-back motion displaces oil or stuck debris. However, if the airbag is large and close to the inner wall of the pipe, oil and debris can accumulate during downward movement, creating significant resistance and making it susceptible to being punctured by sharp objects on the pipe's inner wall. Furthermore, when passing through pipe joints or bends, the reduced cross-section can cause the airbag to become stuck. Therefore, this solution is unsuitable for deep pipes or those with bends. Summary of the Invention

[0004] This invention provides an airbag-type cleaning device for grease traps, which solves the problem of small cross-sectional area for ordinary drain cleaners.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a bladder-type cleaning device for oil separators, including a front pipe section, a rear pipe section inside the front pipe section, the front pipe section and the rear pipe section being slidably connected, and a flexible expansion cover covering the outside of the front pipe section and the rear pipe section. One end of the expansion cover is connected to the front end of the front pipe section, and the other end of the expansion cover is connected to the rear end of the rear pipe section. The rear end sidewall of the rear pipe section is provided with multiple air holes along the circumference. The rear end of the rear pipe section is connected to an outer sleeve. A central tube is provided on the inner side of the front end of the front pipe section. The rear end of the central tube passes through the interior of the rear pipe section and the outer sleeve. A clamping cavity is provided between the central tube and the outer sleeve. The clamping cavity is vented to allow the expansion cover to expand.

[0006] In the preferred embodiment, a limiting sleeve is fitted on the outer wall of the front end of the rear pipe section, and a limiting ring is provided at the rear end of the front pipe section. The outer diameter of the limiting sleeve is larger than the inner diameter of the limiting ring, and the limiting ring is used to stop the limiting sleeve. The outer diameter of the rear pipe section is smaller than the inner diameter of the limiting ring so that the rear pipe section can swing relative to the front pipe section.

[0007] In a preferred embodiment, the front end outer wall of the front pipe section is provided with a plurality of hinged first support rods along the circumferential direction, and the rear end outer wall of the rear pipe section is provided with a plurality of hinged second support rods along the circumferential direction. Each first support rod is hinged to each second support rod, and an expansion cover covers the outside of the first support rods and the second support rods.

[0008] In a preferred embodiment, the rear end of the rear pipe section is fitted with a rear end sleeve, and the rear end sleeve is provided with a plurality of parallel strip-shaped sliding slots along the circumference. Each sliding slot is provided with a slidable floating hinge terminal, and each floating hinge terminal is hinged to each second support rod.

[0009] In the preferred embodiment, the front end of the front pipe section is fitted with a front end sleeve, and the front end sleeve is provided with multiple fixed hinge terminals along the circumferential direction. The front end of each first support rod is hinged to the fixed hinge terminal.

[0010] In the preferred embodiment, the rear end of the front pipe section is provided with an expansion segment, and the limiting ring is threadedly connected to the expansion segment. The inner diameter of the rear end of the expansion segment is larger than the outer diameter of the limiting sleeve.

[0011] In the preferred embodiment, the front end of the front pipe section is provided with an inwardly recessed segment, and a sealing ring is provided between the inwardly recessed segment and the central pipe. The center of the sealing ring is hollowed out, and the front end of the central pipe is inserted into the center of the sealing ring.

[0012] In a preferred embodiment, the inner wall of the expansion shroud is provided with multiple connecting strips, and each of the first and second support rods is provided with multiple connecting holes, with each connecting strip connected to each connecting hole.

[0013] In the preferred embodiment, the front end of the front sleeve and the rear end of the rear sleeve are provided with protruding connecting flanges, and the two ends of the expansion cover are respectively connected to the connecting flanges.

[0014] In the preferred embodiment, the inner wall of the rear end sleeve is provided with a threaded pipe fitting ring, and the outer sleeve is fitted onto the pipe fitting ring.

[0015] The beneficial effects of the present invention are as follows: an expansion shroud is wrapped around the front and rear pipe sections, and a dual-pipe control structure is adopted. The central pipe controls the forward and backward movement of the device, the outer pipe controls the extension or retraction of the rear pipe section, and the clamp cavity is used to vent the expansion shroud, which can maximize the contact with the inner wall of the pipe and improve the unblocking efficiency. Meanwhile, the support rod acts as a skeleton to support the expansion cover, which is equivalent to increasing the rigidity of the expansion cover and improving the ability to remove tightly attached debris or oil stains. The front and rear pipe sections are equipped with hinged support rods on their outer sides. When the rear pipe section is retracted into the front pipe section, the support rods can expand outward to increase the unblocking cross-sectional area. The support rods act as a skeleton to support the expansion shroud, which is equivalent to increasing the rigidity of the expansion shroud and improving the ability to remove tightly attached debris or oil stains. The expansion cover encloses the frame to prevent it from directly contacting dirt and grime, which makes it difficult to clean. When the rear pipe section extends from the front pipe section, its front end area is small, allowing it to pass through gaps in debris and oil stains to reach the pipe extension. Subsequently, the expansion shroud expands and adheres to the pipe wall, pulling the central pipe and outer sleeve to carry out the deep oil stains and debris, preventing them from being pushed deeper and exacerbating the blockage. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the expansion shroud covering the pipe section.

[0018] Figure 2 This is an enlarged view of the expansion shroud covering the pipe section.

[0019] Figure 3 This is a diagram showing the front and rear pipe sections at an angle.

[0020] Figure 4 This is a schematic diagram of the expansion shield inflating.

[0021] Figure 5 This is a diagram showing the bending state of the expansion shroud frame structure.

[0022] Figure 6 This is an enlarged view of the limiting sleeve.

[0023] Figure 7 This is a schematic diagram of the present invention.

[0024] Figure 8 This is a diagram showing the retracted state of the rear tube section.

[0025] In the diagram: Front pipe section 1; Limiting ring 101; First support rod 102; Outward expansion section 103; Inward contraction section 104; Sealing ring 105; Front end sleeve 106; Fixed hinge terminal 107; Rear pipe section 2; Air hole 201; Limiting sleeve 202; Second support rod 203; Central pipe 3; Clamping cavity 301; Connecting hole 302; Outer sleeve 4; Sealing ring 5; Air supply system 6; Expansion cover 7; Connecting flange 701; Connecting strip 702; Rear end sleeve 8; Sliding groove 801; Floating hinge terminal 802; Pipe connection ring 9. Detailed Implementation

[0026] like Figure 1-8 Among them, an airbag-type cleaning device for oil separators includes a front pipe section 1, a rear pipe section 2 inside the front pipe section 1, the front pipe section 1 and the rear pipe section 2 being slidably connected, and a flexible expansion cover 7 covering the outside of the front pipe section 1 and the rear pipe section 2. One end of the expansion cover 7 is connected to the front end of the front pipe section 1, and the other end of the expansion cover 7 is connected to the rear end of the rear pipe section 2. The rear end sidewall of the rear pipe section 2 is provided with a plurality of air holes 201 along the circumference. The rear end of the rear pipe section 2 is connected to an outer sleeve 4. A central tube 3 is provided on the inner side of the front end of the front pipe section 1. The rear end of the central tube 3 passes through the interior of the rear pipe section 2 and the outer sleeve 4. A clamping cavity 301 is provided between the central tube 3 and the outer sleeve 4. The clamping cavity 301 is vented to allow the expansion cover 7 to expand.

[0027] During pipe cleaning, the feed direction is the front end, and the retraction direction is the rear end.

[0028] The front end of the front pipe section 1 and the rear end of the rear pipe section 2 are provided with connecting flanges 701, which are connected to and sealed to the two ports of the expansion cover 7.

[0029] As the front pipe section 1 and the rear pipe section 2 advance, the expansion shroud 7 needs to be as close to the surface as possible to reduce its cross-sectional diameter, avoiding obstruction or scratches from debris along the way. If the front pipe section 1 and the rear pipe section 2 are a single piece and cannot be extended or retracted, the expansion shroud 7 itself needs to have excellent flexibility in order to expand the central part of the expansion shroud 7 to contact the pipe wall. Since the expansion shroud 7 thins in the center when it expands, it generally needs to have a certain thickness to avoid being scratched by debris. However, this would also limit the expansion performance of the expansion shroud 7. Therefore, a retractable design is adopted for the rear pipe section 2. When the expansion shroud 7 needs to expand, the rear pipe section 2 retracts to reserve expansion margin for the expansion shroud 7. In this state, the expansion shroud 7 is filled with gas, and the material of the expansion shroud 7 has already reached a certain size and is close to the inner wall of the pipe without being stretched violently. This gives the expansion shroud 7 both scratch resistance and good expansion performance.

[0030] The central tube 3 and the outer tube 4 have a certain degree of flexibility and can be bent appropriately, while also having a certain degree of rigidity, which can propel the front tube section 1 and the rear tube section 2 forward.

[0031] A sealing ring 5 is provided at the end of the central tube 3 and the outer tube 4 to seal the port of the clamping cavity 301. The sealing ring 5 is provided with a vent and can be connected to an external air supply system 6. The air supply system 6 is provided with an air source and an air valve, which can vent air into the clamping cavity 301 or exhaust air from the clamping cavity 301.

[0032] Initially, the rear pipe section 2 extends out of the front pipe section 1. The expansion cover 7, which can be made of rubber or silicone, is attached to the outer surface of the front pipe section 1 and the rear pipe section 2. The front pipe section 1 and the rear pipe section 2 can be inserted into the grease trap and the branch pipe by holding the tail end of the central pipe 3 and the outer sleeve 4 to unclog the pipeline. After reaching a certain depth, the central pipe 3 is moved forward a bit so that the rear pipe section 2 enters the front pipe section 1, causing the expansion cover 7 to loosen. The clamping cavity 301 is vented, causing the expansion cover 7 to expand, increasing the cross-section of the device and the cross-section that can be used to clean the pipeline. Alternatively, the expansion cover 7 can be expanded to fit tightly against the inner wall of the rear branch pipe. At this time, the central pipe 3 and the outer sleeve 4 are pulled back and forth simultaneously to unclog the pipeline and clean the stubborn dirt attached to the inner wall of the rear branch pipe.

[0033] In the preferred embodiment, a limiting sleeve 202 is fitted on the outer wall of the front end of the rear pipe section 2, and a limiting ring 101 is provided at the rear end of the front pipe section 1. The outer diameter of the limiting sleeve 202 is larger than the inner diameter of the limiting ring 101. The limiting ring 101 is used to stop the limiting sleeve 202. The outer diameter of the rear pipe section 2 is smaller than the inner diameter of the limiting ring 101 so that the rear pipe section 2 can swing relative to the front pipe section 1.

[0034] The front pipe section 1 and the rear pipe section 2 are not only variable in total length, but also in angle. They can adapt to pass through some corner positions in the pipe to be cleaned or through some gaps in the debris, avoiding getting stuck on the inner wall of the rear branch pipe. At the same time, they also avoid being blocked by debris and unable to move forward or pushing the debris deeper.

[0035] Because of debris adhering to the inner wall of the pipe, excessive air pressure when the expansion shroud 7 squeezes the inner wall of the pipe may damage the pipe or tear the expansion shroud 7. However, insufficient air pressure may cause the outer wall of the expansion shroud 7 to be easily squeezed and dented, making it difficult to remove the tightly attached debris.

[0036] In a preferred embodiment, the front end outer wall of the front pipe section 1 is provided with a plurality of hinged first support rods 102 along the circumferential direction, and the rear end outer wall of the rear pipe section 2 is provided with a plurality of hinged second support rods 203 along the circumferential direction. Each first support rod 102 is hinged to each second support rod 203, and the expansion cover 7 covers the outside of the first support rods 102 and the second support rods 203.

[0037] The first support rod 102 and the second support rod 203 serve as the inner skeleton of the expansion shroud 7. When the rear pipe section 2 retracts into the front pipe section 1, the hinge joint of the first support rod 102 and the second support rod 203 will be pushed outward, supporting the expansion shroud 7 so that it contacts the inner wall of the pipe. At this time, air is injected into the expansion shroud 7, causing the remaining parts without a skeleton to bulge and contact the inner wall of the pipe. Even if there are tightly attached debris, they will be pushed off by the thrust of the skeleton.

[0038] Since the expansion cover 7 covers the outside, the hinge points of the first support rod 102 and the second support rod 203 will not come into contact with debris, oil stains, etc., so there is no need to clean them every time, and the risk of debris getting tangled in the frame is also avoided.

[0039] In a preferred embodiment, the rear end of the rear tube section 2 is fitted with a rear end sleeve 8. The rear end sleeve 8 is provided with a plurality of parallel strip-shaped sliding grooves 801 along the circumference. Each sliding groove 801 is provided with a slidable floating hinge terminal 802. Each floating hinge terminal 802 is hinged to each second support rod 203.

[0040] The sliding slot 801 is stopped at both ends to prevent the floating hinge terminal 802 from slipping off.

[0041] When the rear tube section 2 retracts into the front tube section 1, the sliding groove 801 can serve as an air passage connecting the air hole 201 and the expansion cover 7.

[0042] When the rear tube section 2 swings relative to the front tube section 1, the posture of the first support rod 102 and the second support rod 203 changes, and the position of each floating hinge terminal 802 is adaptively adjusted.

[0043] In the preferred embodiment, the front end of the front tube section 1 is fitted with a front end sleeve 106, and the front end sleeve 106 is provided with a plurality of fixed hinge terminals 107 along the circumferential direction. The front end of each first support rod 102 is hinged to the fixed hinge terminal 107.

[0044] The rear sleeve 8 can be threaded to the rear tube section 2. After the inner side of the front sleeve 106 is coated with glue, it is sleeved to the front tube section 1 and the fixed hinge terminals 107 are aligned with the floating hinge terminals 802. Holes can be drilled on the side wall of the front sleeve 106 and the outer wall of the front tube section 1 can be tightened with set screws for reinforcement connection.

[0045] In the preferred embodiment, the rear end of the front pipe section 1 is provided with an expansion section 103, and the limiting ring 101 is threadedly connected to the expansion section 103. The inner diameter of the rear end of the expansion section 103 is larger than the outer diameter of the limiting sleeve 202.

[0046] The inner surface of the expanding segment 103 is also conical, with its narrowest point connecting to the front pipe section 1. At this position, the inner diameter is equal to the outer diameter of the limiting sleeve 202, but with a clearance fit. The limiting sleeve 202 can slide into the front pipe section 1, keeping the rear pipe section 2 parallel to the axis of the front pipe section 1. The inner diameter of the thicker rear end of the expanding segment 103 is larger than the outer diameter of the limiting sleeve 202, thus providing space for the rear pipe section 2 to swing freely without touching the inner wall.

[0047] In the preferred embodiment, the front end of the front tube section 1 is provided with an inwardly recessed section 104, and a sealing ring 105 is provided between the inwardly recessed section 104 and the central tube 3. The sealing ring 105 has a hollow center, and the front end of the central tube 3 is inserted into the center of the sealing ring 105.

[0048] The sealing ring 105 is threaded to the inner recessed segment 104 and sealed with thread sealant. The outer wall of the end of the central tube 3 is coated with adhesive and bonded to the inner wall of the sealing ring 105.

[0049] The sealing ring 105 seals the cavity between the front pipe section 1 and the central pipe 3 to prevent sewage from entering. However, the front end of the central pipe 3 can be directly connected to sewage, and pipe cleaners such as hot water can be injected into deeper parts of the pipe through the rear end of the central pipe 3 to facilitate targeted unblocking of deeper sections. If necessary, ventilation and sewage suction operations can also be performed to increase unblocking methods.

[0050] In a preferred embodiment, the inner wall of the expansion cover 7 is provided with multiple connecting straps 702, and each of the first support rods 102 and the second support rods 203 is provided with multiple connecting holes 302, and each connecting strap 702 is connected to each connecting hole 302.

[0051] The expansion cover 7 is fixed in the middle to the first support rod 102 and the second support rod 203 to prevent the expansion cover 7 from floating freely and being scratched by debris when it is in a relaxed state.

[0052] In the preferred embodiment, the front end of the front sleeve 106 and the rear end of the rear sleeve 8 are provided with protruding connecting flanges 701, and the two ends of the expansion cover 7 are respectively connected to the connecting flanges 701.

[0053] The connecting flange 701 has threaded holes arranged around its circumference. The expansion cover 7 port is fixed to the connecting flange 701 by using large-headed screws, and the joint is glued and sealed.

[0054] In the preferred embodiment, the inner wall of the rear end sleeve 8 is provided with a threaded pipe ring 9, and the outer sleeve 4 is sleeved on the pipe ring 9.

[0055] The inner wall of the outer tube at port 4 is coated with glue and inserted into the outer wall of the rear end of the tube connector 9, and can be reinforced by wrapping and binding with iron wire.

[0056] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A pneumatic pigging device for grease traps, characterized in that: It includes a front tube section (1), a rear tube section (2) is fitted inside the front tube section (1), the front tube section (1) and the rear tube section (2) are slidably connected, and a flexible expansion cover (7) covering the outside of the front tube section (1) and the rear tube section (2) is also provided. One end of the expansion cover (7) is connected to the front end of the front tube section (1), and the other end of the expansion cover (7) is connected to the rear end of the rear tube section (2). The rear end side wall of the rear tube section (2) is provided with multiple air holes (201) along the circumferential direction. The rear end of the rear tube section (2) is connected to an outer sleeve (4). The front end of the front tube section (1) is provided with a central tube (3). The rear end of the central tube (3) passes through the interior of the rear tube section (2) and the outer sleeve (4). A clamping cavity (301) is provided between the central tube (3) and the outer sleeve (4). The clamping cavity (301) is vented to allow the expansion cover (7) to expand.

2. The pneumatic pigging device for grease traps according to claim 1, characterized in that: The front end of the rear pipe section (2) is fitted with a limiting sleeve (202), and the rear end of the front pipe section (1) is provided with a limiting ring (101). The outer diameter of the limiting sleeve (202) is larger than the inner diameter of the limiting ring (101). The limiting ring (101) is used to stop the limiting sleeve (202). The outer diameter of the rear pipe section (2) is smaller than the inner diameter of the limiting ring (101) so that the rear pipe section (2) can swing relative to the front pipe section (1).

3. The pneumatic pigging device for grease traps according to claim 2, characterized in that: The front pipe section (1) has multiple hinged first support rods (102) on the outer wall of the front end along the circumferential direction, and the rear pipe section (2) has multiple hinged second support rods (203) on the outer wall of the rear end along the circumferential direction. Each first support rod (102) is hinged to each second support rod (203), and the expansion cover (7) covers the outside of the first support rod (102) and the second support rod (203).

4. The pneumatic pigging device for grease traps according to claim 3, characterized in that: The rear pipe section (2) is fitted with a rear sleeve (8) at the rear end. The rear sleeve (8) has multiple parallel strip-shaped sliding slots (801) arranged in the circumferential direction. Each sliding slot (801) is provided with a slidable floating hinge terminal (802). Each floating hinge terminal (802) is hinged to each second support rod (203).

5. The pneumatic pigging device for grease traps according to claim 4, characterized in that: The front pipe section (1) has a front sleeve (106) at the front end. The front sleeve (106) has multiple fixed hinge terminals (107) along the circumferential direction. The front end of each first support rod (102) is hinged to the fixed hinge terminal (107).

6. The pneumatic pigging device for grease traps according to claim 2, characterized in that: The front pipe section (1) has an expansion section (103) at its rear end. The limiting ring (101) is threadedly connected to the expansion section (103). The inner diameter of the rear end of the expansion section (103) is larger than the outer diameter of the limiting sleeve (202).

7. The pneumatic pigging device for grease traps according to claim 1, characterized in that: The front pipe section (1) has an inwardly narrowed section (104) at the front end. A sealing ring (105) is provided between the inwardly narrowed section (104) and the central pipe (3). The sealing ring (105) has a hollow center, and the front end of the central pipe (3) is inserted into the center of the sealing ring (105).

8. The pneumatic pigging device for grease traps according to claim 3, characterized in that: The inner wall of the expansion cover (7) is provided with multiple connecting strips (702), and each first support rod (102) and second support rod (203) is provided with multiple connecting holes (302), and each connecting strip (702) is connected to each connecting hole (302).

9. The pneumatic pigging device for an oil separator according to claim 5, characterized in that: the front end... The front end of the sleeve (106) and the rear end of the sleeve (8) are provided with protruding connecting flanges (701), and the two ends of the expansion cover (7) are respectively connected to the connecting flanges (701).

10. The pneumatic pigging device for grease traps according to claim 4, characterized in that: The inner wall of the rear end sleeve (8) is provided with a threaded pipe ring (9), and the outer sleeve (4) is sleeved on the pipe ring (9).

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