Pipeline inner surface cleaning equipment

Abstract

The utility model discloses pipeline inner surface cleaning equipment which comprises a gas-liquid supply device, a pulse cleaning device and a backflow device. The gas-liquid supply device is provided with a cleaning liquid output end used for supplying cleaning liquid, a gas output end used for supplying gas and a gas-liquid input end used for receiving the cleaning liquid and the gas after cleaning, and one end of the pulse cleaning device is connected with the cleaning liquid output end and the gas output end. One end of the gas-liquid input end is connected with the first end of the pipeline, the other end of the gas-liquid input end is connected with the first end of the pipeline so that cleaning liquid and gas can be intermittently and circularly input into the pipeline, one end of the backflow device is connected with the second end of the pipeline, the other end of the backflow device is connected with the gas-liquid input end, and the backflow device is used for separating the cleaned cleaning liquid and gas and recycling the cleaning liquid. The pipeline inner surface cleaning equipment has the advantages of being high in pipeline inner surface cleaning reliability, low in cleaning cost and high in cleanliness.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline cleaning equipment technical field, concretely relates to a pipeline inner surface cleaning equipment. BACKGROUND

[0002] The pipeline system as the core component of industrial, civil facilities and medical equipment conveying fluid (such as water, gas, chemical medium), its internal cleanliness directly influences system operating efficiency, safety and service life. However, due to the diversity of pipeline material (such as metal, alloy, plastic, resin and composite structure) and the difference of application scene (long-distance conveying pipeline and short-distance connecting pipeline), the existing cleaning technology generally has the disadvantages of poor cleaning effect, not suitable for long-distance pipeline and the like.

[0003] Taking seamless copper coil pipe for heat exchange and marine engineering as an example, it is usually made by continuous casting and rolling process, and in the processing process by using the above process, a certain amount of lubricating oil needs to be injected into the copper coil pipe to assist the copper coil pipe in the drawing and forming process to maintain good lubrication, which makes the inner surface of the copper coil pipe contain a large amount of lubricating oil. In the subsequent processing process, the lubricating oil on the inner surface of the copper coil pipe is usually removed by nitrogen blowing in the annealing process.

[0004] Since the length of the single copper coil pipe is mostly more than 3,000 meters, and there are formed threads inside the copper coil pipe, in order to ensure the reliability of annealing, the annealing process usually has multiple stations, and the copper coil pipe needs to continuously enter multiple stations to complete the annealing process. After the copper coil pipe enters each station, it is connected with the nitrogen blowing rod through the standard rack arranged at the end portion to complete the blowing work on the inner surface of the copper coil pipe. However, since the nitrogen blowing rod cannot move synchronously with the rack, after the copper coil pipe stays in each station for a set heating time, the nitrogen blowing rod needs to be pulled out in order to be transferred to the next station, and then be reconnected for blowing work. This intermittent operation mode seriously affects the continuity of nitrogen blowing and reduces the cleaning effect.

[0005] In addition, the cleaning effect of the nitrogen blowing copper coil pipe is affected by the annealing time, the length of the copper coil pipe and the pipe diameter specification. Since there are differences in the annealing time required by different specifications of products, it is difficult to uniformly control the nitrogen blowing time, so that the copper coil pipe is not fully blown, and the inner surface of the finished product after being discharged still has oil stains. After the finished product is placed for a period of time, quality problems such as odor and blackening may occur on the inner surface.

[0006] When cleaning the inside of pipes made of plastic, resin or metal-plastic / resin composite, the above-mentioned problems also exist. UTILITY MODEL CONTENTS

[0007] Based on the deficiencies of the prior art, the utility model provides a pipeline inner surface cleaning equipment, the pipeline inner surface cleaning equipment has the advantages of high cleaning reliability and low cleaning cost of the pipeline inner surface, and can make the cleanliness of the pipeline inner surface higher.

[0008] The pipeline inner surface cleaning equipment of the utility model embodiment includes gas liquid supply device, the gas liquid supply device has the cleaning liquid output end for supplying the cleaning liquid, the gas output end for supplying the gas and the gas liquid input end for receiving the cleaning liquid and the gas after cleaning,

[0009] The pulse cleaning device is connected with the cleaning liquid output end and the gas output end at one end, and is connected with the first end of the pipeline at the other end, and can intermittently and circularly input the cleaning liquid and the gas to the pipeline.

[0010] The reflux device is connected with the second end of the pipeline at one end, and is connected with the gas liquid input end at the other end, and is used for separating the cleaning liquid and the gas after cleaning, and recycling the cleaning liquid.

[0011] The pipeline inner surface cleaning equipment of the utility model, after the pulse cleaning device is connected with the first end of the pipeline, can control the intermittent communication between the cleaning liquid output end and the pipeline, so that the cleaning liquid is intermittently entered into the pipeline, and the lubricating oil on the inner surface of the pipeline is cleaned by flowing, after reaching the cleaning time of the cleaning liquid, the pulse cleaning device can control the intermittent communication between the gas output end and the pipeline, so that the gas is intermittently entered into the pipeline, and the inner surface of the pipeline is cleaned by blowing. On the one hand, the cleaning liquid plays a dilution and flushing role on the lubricating oil, and on the other hand, the cleaning liquid can also be used as a carrier of the lubricating oil, under the synergistic effect of the subsequent gas blowing process, the discharge efficiency of the lubricating oil and the cleaning liquid is significantly improved, so that they can be more smoothly discharged from the end of the pipeline. The double-acting mechanism makes the pipeline inner surface cleaning equipment have higher cleaning reliability, so as to ensure that the inner surface of the pipeline reaches a more excellent cleanliness level.

[0012] In addition, by connecting the second end of the pipeline and the gas liquid supply device through the reflux device, the cleaning liquid in the pipeline can be refluxed to the gas liquid supply device through the reflux device, the cleaning liquid is recycled, and the pipeline cleaning cost is lower.

[0013] In some embodiments, the gas liquid supply device includes a cleaning tank, a pressure pump, a pressure regulating valve and a gas supply pipe, the cleaning tank is provided with a containing cavity containing the cleaning liquid, the cleaning tank is provided with a liquid outlet pipe in communication with the containing cavity, the pressure pump and the pressure regulating valve are connected in series on the liquid outlet pipe, the free end of the liquid outlet pipe forms the cleaning liquid output end, the first end of the gas supply pipe is in communication with the gas supply device, and the second end of the gas supply pipe forms the gas output end.

[0014] In some embodiments, the pulse cleaning device comprises a three-way pipe, the three-way pipe comprising a first branch pipe, a second branch pipe and a third branch pipe in communication, a first on-off valve being connected in series to the first branch pipe, a second on-off valve being connected in series to the second branch pipe, the first branch pipe being in communication with the liquid outlet pipe, the second branch pipe being in communication with the gas supply pipe, and the third branch pipe being in communication with the first end of the pipe.

[0015] In some embodiments, the first on-off valve comprises a first electromagnetic valve, and the second on-off valve comprises a second electromagnetic valve.

[0016] In some embodiments, the first on-off valve comprises a first manual valve, and the second on-off valve comprises a second manual valve.

[0017] In some embodiments, a first one-way valve is connected in series to the first branch pipe, and a second one-way valve is connected in series to the second branch pipe.

[0018] In some embodiments, the number of the three-way pipes is multiple, multiple first branch pipes are connected in parallel and in communication with the liquid outlet pipe, and multiple second branch pipes are connected in parallel and in communication with the gas supply pipe.

[0019] In some embodiments, the backflow device comprises a liquid return pipe, a first end of the liquid return pipe being connected to the gas-liquid input end, and a second end of the liquid return pipe being in communication with the second end of the pipe.

[0020] In some embodiments, an adapter pipe in communication with the containing cavity is mounted above the cleaning tank, an upper end of the adapter pipe being provided with an opening, the opening forming the gas-liquid input end, the first end of the liquid return pipe extending downward into the adapter pipe from the opening, an outer wall surface of the liquid return pipe and an inner wall surface of the adapter pipe surrounding to form an exhaust cavity, the exhaust cavity being in communication with the containing cavity, and an exhaust hole in communication with the exhaust cavity being provided on a pipe wall of the adapter pipe, the exhaust hole being higher than the first end of the liquid return pipe.

[0021] In some embodiments, an inner cavity of the adapter pipe comprises a first chamber and a second chamber arranged from bottom to top, the first chamber being a cylinder, and the second chamber being a frustum with a diameter gradually increasing from bottom to top, the diameter of the first chamber being greater than an outer diameter of the liquid return pipe, and the first end of the liquid return pipe penetrating through the second chamber and being located in the first chamber.

[0022] In some embodiments, the exhaust hole penetrates through a peripheral wall of the adapter pipe and is in communication with the second chamber, and multiple exhaust holes are arranged in a peripheral direction of the adapter pipe.

[0023] In some embodiments, the pulse cleaning device further comprises a first quick connection hose, one end of the first quick connection hose being in communication with the third branch pipe, and the other end of the first quick connection hose being in communication with the first end of the pipeline;

[0024] The reflux device further comprises a second quick connection hose, one end of the second quick connection hose being in communication with the gas-liquid input end, and the other end of the second quick connection hose being in communication with the second end of the pipeline.

[0025] In some embodiments, the pipeline inner surface cleaning device further comprises a base, a supporting protrusion, and a quick connector, the base being provided with a water receiving groove with an opening facing upward, and part of the liquid return pipe being located in the water receiving groove; the supporting protrusion is arranged in the water receiving groove and used for supporting the pipeline; the quick connector is installed on the pipe wall of the liquid return pipe and located in the water receiving groove, and the quick connector is used for being in communication with the second end of the pipeline.

[0026] In some embodiments, the side wall of the cleaning box is provided with an observation window extending in the height direction. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of a pipeline inner surface cleaning device according to an embodiment of the present application.

[0028] Figure 2 is an enlarged view of the pipeline inner surface cleaning device at the cleaning box according to an embodiment of the present application.

[0029] Figure 3 is an enlarged view of the pipeline inner surface cleaning device at the three-way pipeline according to an embodiment of the present application.

[0030] Figure 4 is a schematic view of a liquid return pipe and an adapter pipe in a pipeline inner surface cleaning device according to an embodiment of the present application.

[0031] Figure 5 is a sectional view of a liquid return pipe and an adapter pipe in a pipeline inner surface cleaning device according to an embodiment of the present application.

[0032] Figure 6 is an enlarged view of the pipeline inner surface cleaning device at the base according to an embodiment of the present application.

[0033] REFERENCE NUMERALS:

[0034] 1, cleaning tank; 101, observation window; 102, liquid outlet pipe; 2, pressurizing pump; 3, pressure regulating valve; 4, gas supply pipe; 5, three-way pipe; 51, first branch pipe; 52, second branch pipe; 53, third branch pipe; 6, first electromagnetic valve; 7, second electromagnetic valve; 8, first manual valve; 9, second manual valve; 10, first check valve; 11, second check valve; 12, liquid return pipe; 13, adapter pipe; 131, exhaust cavity; 132, exhaust hole; 14, base; 141, water receiving groove; 15, supporting protrusion; 16, quick connector; 17, first quick-connection hose; 18, second quick-connection hose; 19, pipe. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0036] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Figures 1-6 The pipe inner surface cleaning equipment according to the embodiments of the present application is described below.

[0037] The pipe inner surface cleaning equipment according to the embodiments of the present application is described below.

[0038] According to the pipeline 19 inner surface cleaning equipment, after the pulse cleaning device is connected with the first end of the pipeline 19, the cleaning liquid output end and the pipeline 19 can be intermittently communicated, so that the cleaning liquid of the set pressure is intermittently introduced into the pipeline 19, the lubricating oil on the inner surface of the pipeline 19 is cleaned, after the cleaning liquid cleaning set time is reached, the pulse cleaning device can control the gas output end and the pipeline 19 to be intermittently communicated, so that the gas of the set pressure is intermittently introduced into the pipeline 19, and the inner surface of the pipeline 19 is cleaned. On the one hand, the cleaning liquid plays a dilution and flushing effect on the lubricating oil, and on the other hand, the cleaning liquid can also be used as a carrier of the lubricating oil, under the synergistic effect of the subsequent gas blowing process, the discharge efficiency of the lubricating oil and the cleaning liquid is significantly improved, so that the lubricating oil can be more smoothly discharged from the end of the pipeline 19. The double-acting mechanism makes the pipeline 19 inner surface cleaning equipment have higher cleaning reliability, so that the inner surface of the pipeline 19 reaches a more excellent cleanliness level.

[0039] In addition, by arranging the reflux device to communicate the second end of the pipeline 19 and the gas-liquid supply device, the cleaning liquid in the pipeline 19 can be refluxed to the gas-liquid supply device through the reflux device, the cleaning liquid is reused, and the pipeline 19 cleaning cost is lower.

[0040] It should be noted that the pressure of the cleaning liquid supplied by the gas-liquid supply device can be adjusted according to actual needs, for example, the cleaning liquid pressure can be 1.0-1.8Mpa. The gas supplied by the gas-liquid supply device is preferably nitrogen, and the nitrogen pressure can be adjusted according to actual needs. For example, the nitrogen pressure can be 2.0Mpa.

[0041] In some embodiments, the gas-liquid supply device comprises a cleaning tank 1, a pressure pump 2, a pressure regulating valve 3 and a gas supply pipe 4, the cleaning tank 1 is provided with a containing cavity containing cleaning liquid, the cleaning tank 1 is provided with a liquid outlet pipe 102 communicating with the containing cavity, the pressure pump 2 and the pressure regulating valve 3 are connected in series on the liquid outlet pipe 102, the free end of the liquid outlet pipe 102 forms a cleaning liquid output end, and the first end of the gas supply pipe 4 communicates with a gas supply device, and the second end of the gas supply pipe 4 forms a gas output end.

[0042] The pressure pump 2 pumps the cleaning liquid out of the containing cavity to the liquid outlet pipe 102 and pressurizes it, and the pressure regulating valve 3 is used to adjust the pressure of the cleaning liquid in the liquid outlet pipe 102, so as to supply the cleaning liquid of the set pressure into the pipeline 19.

[0043] For example, as shown in Figure 1 and Figure 2 , the pressure pump 2 and the pressure regulating valve 3 are fixedly installed above the cleaning tank 1, and the pressure pump 2 and the pressure regulating valve 3 are arranged along the flow direction of the cleaning liquid in the liquid outlet pipe 102. The top of the cleaning tank 1 is provided with a liquid inlet, and the bottom of the cleaning tank 1 is provided with a liquid outlet pipe communicating with the containing cavity, and a manual on-off valve is arranged on the liquid outlet pipe.

[0044] In some embodiments, the pulse cleaning device comprises a three-way pipe 5, the three-way pipe 5 comprising a first branch pipe 51, a second branch pipe 52 and a third branch pipe 53 connected in communication, a first switch valve is connected in series on the first branch pipe 51, a second switch valve is connected in series on the second branch pipe 52, the first branch pipe 51 is in communication with the liquid outlet pipe 102, the second branch pipe 52 is in communication with the gas supply pipe 4, and the third branch pipe 53 is in communication with the first end of the pipe 19.

[0045] Therefore, when cleaning with cleaning liquid, only the second switch valve needs to be closed, and the opening and closing of the first switch valve is regularly controlled, so that the cleaning liquid at a set pressure is intermittently introduced into the pipe 19 to flow clean the lubricating oil on the inner surface of the pipe 19. When purging with nitrogen, only the first switch valve needs to be kept in a normally closed state, and the opening and closing of the second switch valve is regularly controlled, so that the gas at a set pressure is intermittently introduced into the pipe 19 to purge and clean the inner surface of the pipe 19. The pulse cleaning device has a simple structure, and the pulse cleaning operation of the pipe 19 is simple and convenient.

[0046] For example, as shown in Figure 3 , the first branch pipe 51 and the third branch pipe 53 are straight pipes extending in the same direction, and the second branch pipe 52 is an L-shaped pipe, one section of which extends in the same direction as the first branch pipe 51, and the other section extends perpendicular to the first branch pipe 51.

[0047] In some embodiments, as shown in Figure 3 , the first switch valve comprises a first electromagnetic valve 6, and the second switch valve comprises a second electromagnetic valve 7.

[0048] At this time, the first switch valve and the second switch valve are electrically connected to the controller, and the automatic start and stop of the first switch valve and the second switch valve can be controlled through the controller, thereby realizing intermittent automatic cleaning of the inner surface of the pipe 19 by the cleaning liquid and intermittent automatic flushing of the inner surface of the pipe 19 by the gas, so that the cleaning automation of the pipe inner surface cleaning equipment is higher, and the cleaning reliability of the inner surface of the pipe 19 is higher.

[0049] Optionally, as shown in Figure 3 , the first switch valve further comprises a first manual valve 8, and the first manual valve 8 is arranged upstream of the first electromagnetic valve 6; the second switch valve further comprises a second manual valve 9, and the second manual valve 9 is arranged upstream of the second electromagnetic valve 7. Of course, the first manual valve 8 can also be arranged downstream of the first electromagnetic valve 6, and the second manual valve 9 can also be arranged downstream of the second electromagnetic valve 7. The manual valve and the electromagnetic valve are arranged in series, and the maintenance of the first electromagnetic valve 6 and the second electromagnetic valve 7 and the like can be realized by closing the first manual valve 8 and the second manual valve 9, which has lower maintenance cost and higher efficiency.

[0050] In some embodiments, a first check valve 10 is connected in series on the first branch pipe 51, and a second check valve 11 is connected in series on the second branch pipe 52.

[0051] The first check valve 10 and the second check valve 11 effectively prevent the cleaning fluid in the first branch pipe 51 from accidentally entering the second branch pipe 52, and also effectively prevent the nitrogen in the second branch pipe 52 from accidentally entering the first branch pipe 51. The coordinated cleaning of the pipeline 19 by the cleaning fluid and nitrogen is more reliable.

[0052] For example, such as Figure 3 As shown, the first check valve 10 is located downstream of the first solenoid valve 6, and the second check valve 11 is located downstream of the second solenoid valve 7.

[0053] In some embodiments, there are multiple three-way pipes 5, with multiple first branch pipes 51 connected in parallel and all connected to the liquid outlet pipe 102, and multiple second branch pipes 52 connected in parallel and all connected to the gas supply pipe 4.

[0054] Therefore, the pipeline inner surface cleaning equipment can clean the inner surfaces of multiple pipelines 19 simultaneously. Based on having only one cleaning tank 1, the pipeline inner surface cleaning equipment has higher cleaning efficiency and lower cleaning cost for pipelines 19.

[0055] Specifically, such as Figure 3 As shown, there are six tee pipes 5, which are arranged at equal intervals along the height direction. Both the gas supply pipe 4 and the liquid outlet pipe 102 include vertical pipe sections that are respectively connected to the second branch pipe 52 and the first branch pipe 51.

[0056] In some embodiments, the reflux device includes a return pipe 12, the first end of which is connected to the gas-liquid input end, and the second end of which is connected to the second end of the pipeline 19.

[0057] Specifically, the upper end of the return pipe 12 is connected to the top of the receiving cavity, thereby effectively preventing the cleaning fluid in the receiving cavity from flowing back into the return pipe 12.

[0058] In some embodiments, a transfer pipe 13 communicating with the receiving cavity is installed above the cleaning tank 1. The upper end of the transfer pipe 13 has an opening, which forms a gas-liquid input end. The first end of the return pipe 12 extends downward from the opening into the transfer pipe 13. The outer wall surface of the return pipe 12 and the inner wall surface of the transfer pipe 13 surround to form an exhaust chamber 131, which communicates with the receiving cavity. The pipe wall of the transfer pipe 13 has an exhaust hole 132 communicating with the exhaust chamber 131, and the exhaust hole 132 is higher than the first end of the return pipe 12.

[0059] That is, the cleaning liquid in the pipeline 19 and nitrogen gas flow together from the liquid return pipe 12 to the containing cavity, and the nitrogen gas is discharged to the outside through the exhaust cavity 131 and the exhaust hole 132 before entering the containing cavity, thereby effectively avoiding the nitrogen gas entering the containing cavity to cause the pressure in the cleaning tank 1 to be blocked or bubbles to be formed to affect the cleaning effect of the cleaning liquid. In addition, the exhaust hole 132 is designed to be higher than the first end surface of the liquid return pipe 12, which also avoids the cleaning liquid being mistakenly discharged to the outside through the exhaust hole 132.

[0060] The cleaning liquid that has completed the cleaning of the inner surface of the pipeline can flow back to the containing cavity of the cleaning tank 1 through the liquid return pipe 12, thereby realizing the recycling of the cleaning liquid, and the volume of the cleaning tank 1 does not need to be designed to be too large, thereby further reducing the cleaning cost of the pipeline inner surface cleaning device to the inner surface of the pipeline 19.

[0061] It can be understood that the cleaning liquid that has completed the cleaning of the inner surface of the pipeline does not necessarily flow back to the containing cavity of the cleaning tank 1 directly through the liquid return pipe 12, that is, a transition cavity can be separately provided, and the cleaning liquid can be filtered or purified in the cavity, and the filtered or purified cleaning liquid can flow back to the containing cavity of the cleaning tank 1.

[0062] For example, as shown in Figure 1 , Figure 4 and Figure 5 , the lower end of the adapter pipe 13 is connected with a flange, and the flange is connected with the top wall of the cleaning tank 1 through a threaded member. The inner cavity of the adapter pipe 13 includes a first cavity and a second cavity arranged from bottom to top, the first cavity is a cylinder, and the second cavity is a frustum with a diameter gradually increasing from bottom to top, and the diameter of the first cavity is larger than the outer diameter of the liquid return pipe 12, and the first end of the liquid return pipe 12 penetrates through the second cavity and is located in the first cavity. Among them, the exhaust hole 132 penetrates through the peripheral wall of the adapter pipe 13 and communicates with the second cavity, and the exhaust hole 132 is multiple and arranged in a circumferential direction of the adapter pipe 13. The liquid return pipe 12 is connected with the adapter pipe 13 at the opening of the adapter pipe 13; or the liquid return pipe 12 is inserted into the adapter pipe 13, thereby realizing the sealing of the upper end of the second cavity, and in combination with the inverted frustum design of the second cavity, it is effectively avoided that the dust from the outside enters the containing cavity through the adapter pipe 13.

[0063] In some embodiments, the inner cavity of the adapter pipe 13 further includes a third cavity above the second cavity, and the third cavity is a frustum with a diameter gradually decreasing from bottom to top, which facilitates the connection of the upper end of the adapter pipe 13 with the liquid return pipe 12.

[0064] In some embodiments, as shown in Figure 1 and Figure 6As shown, the pipeline inner surface cleaning device further comprises a base 14, a support protrusion 15 and a quick connector 16. The base 14 is provided with a water receiving groove 141 with an upward opening, and the part of the liquid return pipe 12 is located in the water receiving groove 141. The support protrusion 15 is arranged in the water receiving groove 141 and used to support the pipeline 19. The quick connector 16 is installed on the wall of the liquid return pipe 12 and located in the water receiving groove 141, and the quick connector 16 is used to communicate with the second end of the pipeline 19.

[0065] The pipeline 19 is placed on the base 14 through the support protrusion 15, and at this time, the pipeline 19 is located directly above the water receiving groove 141. When the liquid leaks from the connection between the first end of the pipeline 19 and the third branch pipe 53 and / or the connection between the second end of the pipeline 19 and the liquid return pipe 12, the exposed cleaning liquid can be stored in the water receiving groove 141, which ensures the cleanliness of the surrounding environment when the pipeline inner surface cleaning device is working.

[0066] In addition, the quick connector 16 is arranged on the wall of the liquid return pipe 12, which facilitates the quick connection between the liquid return pipe 12 and the pipeline 19. Moreover, by arranging multiple quick connectors 16 on the wall of the liquid return pipe 12, the liquid return pipe 12 can be connected with the second ends of multiple upwardly stacked pipelines 19, so that the pipeline inner surface cleaning device can clean multiple pipelines 19 at the same time.

[0067] Specifically, the support protrusion 15 is in the shape of a strip, and there are two support protrusions 15 arranged in parallel along the width direction. The part of the liquid return pipe 12 located in the water receiving groove 141 is arranged in the middle of the two support protrusions 15 and parallel to the support protrusions 15. The quick connector 16 is a C-shaped self-locking quick connector, and there are six quick connectors 16 arranged in parallel along the extension direction of the liquid return pipe 12.

[0068] It should be noted that, as shown in Figure 1 The pulse cleaning device further comprises a first quick connection hose 17 and a second quick connection hose 18. One end of the first quick connection hose 17 communicates with the third branch pipe 53, and the other end communicates with the first end of the pipeline 19. The pulse cleaning device further comprises a second quick connection hose 18. One end of the second quick connection hose 18 communicates with the liquid return pipe 12, and the other end communicates with the second end of the pipeline 19. In this way, the difficulty of connecting the third branch pipe 53 and the liquid return pipe 12 with the pipeline 19 is effectively reduced, and the third branch pipe 53 and the liquid return pipe 12 are also convenient to connect with pipelines 19 of different heights.

[0069] In some embodiments, as shown in Figure 1 and Figure 2 The side wall of the cleaning box 1 is provided with an observation window 101 extending in the height direction.

[0070] The capacity of the cleaning liquid in the containing cavity can be observed in real time through the observation window 101, so as to supplement the liquid in time. Meanwhile, the cleanliness of the cleaning liquid in the containing cavity can also be observed through the observation window 101, so as to discharge the cleaning liquid with poor cleaning effect in time. In addition, whether the pressure relief is completed and whether the cleaning operation on the pipeline 19 is completed can be judged by the liquid level difference of the pipeline inner surface cleaning equipment before and after the pipeline 19, so as to avoid that the connection between the pipeline 19 and the third branch pipe 53 is disconnected too early before the pressure relief is completed.

[0071] The pipeline inner surface cleaning equipment also comprises a PLC control system, the first electromagnetic valve 6 and the second electromagnetic valve 7 are electrically connected with the PLC control system, and the first electromagnetic valve 6 and the second electromagnetic valve 7 are automatically started and stopped under the control of the PLC control system, so as to realize the pulse cleaning of the pipeline 19. On this basis, the cleaning method of the pipeline inner surface is as follows:

[0072] The second electromagnetic valve 7 is closed, the gas supply pipe 4 is communicated with the gas supply equipment, and the third branch pipe 53 is communicated with the first end of the pipeline 19;

[0073] The pressurizing pump 2 is started, and the pressure of the cleaning liquid in the outlet pipe 102 is set through the pressure regulating valve 3;

[0074] The opening and closing of the first electromagnetic valve 6 are regularly controlled, so that the cleaning liquid intermittently enters the pipeline 19, and after a duration T1, the first electromagnetic valve 6 is controlled to be kept in a normally closed state;

[0075] The opening and closing of the second electromagnetic valve 7 are regularly controlled, so that the gas intermittently enters the pipeline 19, and after a duration T2, the second electromagnetic valve 7 is controlled to be kept in a normally closed state;

[0076] After the first electromagnetic valve 6 and the second electromagnetic valve 7 are kept in the normally closed state for a time T3, the communication between the third branch pipe 53 and the pipeline 19 is disconnected.

[0077] It should be noted that since the length of the pipeline is mostly more than 3000 meters, the gas and liquid need to flow out from one end to the other end, the original gas and liquid in the interior need to be discharged, and direct continuous pressurization work will cause continuous pressure in the pipeline. In the pressure holding state, the system needs to provide a high working pressure to complete the penetration. On the one hand, high system pressure will cause large energy consumption, and the cleaning liquid used for cleaning the pipeline 19 is a carbon hydrogen liquid substance, which cannot form high pressure like hydraulic oil. On the other hand, if the entire system needs to withstand high pressure, it is easy to cause leakage of each joint, and even there is a risk of pipe explosion. Therefore, the gas and liquid of the entire cleaning operation are executed in a pulse mode.

[0078] The cleaning time and steps of the pipeline inner surface cleaning method of the embodiment are set as follows: liquid cleaning time T1, cleaning pulse on time (single opening time of the first switch valve) t1, cleaning pulse off time (single closing time of the first switch valve) t2, gas purging time T2, purging pulse on time (single opening time of the second switch valve) t3, purging pulse off time (single closing time of the second switch valve) t4, and exhaust pressure relief time T3. After starting the cleaning work, the pressurizing pump 2 is started to operate, the first switch valve is operated in a time pulse mode with t1 on and t2 off, the cleaning liquid is intermittently introduced into the pipeline 19 to perform the cleaning work, when the time T1 is reached, the liquid cleaning work is completed, the nitrogen purging work is performed, the nitrogen controls the second switch valve to operate in a time pulse mode with t3 on and t4 off, the nitrogen is intermittently introduced into the pipeline to perform the purging work, when the time T2 is reached, the gas purging work is completed, the exhaust pressure relief T3 is performed, and after the pressure relief time is reached, the system outputs a cleaning work completion indication signal.

[0079] With a conventional Φ6mm-Φ8mm pipe diameter, the purging parameters are set as shown in Table 1, and in actual use, the total cleaning and purging times T1 and T2 are adjusted according to the actual length of the coil.

[0080] Table 1 Purging parameters of copper coil with different pipe diameters

[0081]

[0082] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0083] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0084] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0085] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can be that first and second features directly contact, or first and second features indirectly contact through intermediate medium.Moreover, first feature "over", "above" and "on" second feature, can be that first feature is directly above or obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature.First feature "under", "below" and "under" second feature, can be that first feature is directly below or obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0086] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0087] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the changes, modifications, replacements and variations of the above embodiments made by the ordinary skilled in the art are within the protection scope of the utility model.

Claims

1. A pipe inner surface cleaning apparatus characterized by comprising: The application relates to a pulse cleaning device. The pulse cleaning device comprises a three-way pipe (5), the three-way pipe (5) comprises a first branch pipe (51), a second branch pipe (52) and a third branch pipe (53) which are connected in communication, a first switch valve is connected in series on the first branch pipe (51), a second switch valve is connected in series on the second branch pipe (52), the first branch pipe (51) is communicated with the liquid outlet pipe (102), the second branch pipe (52) is communicated with the gas supply pipe (4), and the third branch pipe (53) is communicated with the first end of the pipe (19). The backflow device comprises a liquid return pipe (12), the first end of the liquid return pipe (12) is connected with the gas-liquid input end, and the second end of the liquid return pipe (12) is communicated with the second end of the pipe (19). The upper portion of the cleaning tank (1) is provided with an adapter pipe (13) which is communicated with the containing cavity, the upper end of the adapter pipe (13) is provided with an opening, the opening forms the gas-liquid input end, the first end of the liquid return pipe (12) extends downwards into the adapter pipe (13) from the opening, the outer wall surface of the liquid return pipe (12) and the inner wall surface of the adapter pipe (13) surround a gas exhaust cavity (131), the gas exhaust cavity (131) is communicated with the containing cavity, the pipe wall of the adapter pipe (13) is provided with a gas exhaust hole (132) which is communicated with the gas exhaust cavity (131), and the gas exhaust hole (132) is higher than the first end of the liquid return pipe (12).

2. The pipe internal surface cleaning apparatus according to claim 1, characterized by The inner cavity of the adapter pipe (13) comprises a first cavity and a second cavity which are arranged from bottom to top, the first cavity is a cylinder, the second cavity is a frustum which gradually increases in diameter from bottom to top, the diameter of the first cavity is larger than the outer diameter of the liquid return pipe (12), the first end of the liquid return pipe (12) passes through the second cavity and is located in the first cavity.

3. The pipe internal surface cleaning apparatus according to claim 2, characterized by The inner cavity of the adapter pipe (13) comprises a first cavity and a second cavity which are arranged from bottom to top, the first cavity is a cylinder, the second cavity is a frustum which gradually increases in diameter from bottom to top, the diameter of the first cavity is larger than the outer diameter of the liquid return pipe (12), the first end of the liquid return pipe (12) passes through the second cavity and is located in the first cavity.

4. The pipe internal surface cleaning apparatus according to claim 2, characterized by ​ 5. The pipe internal surface cleaning apparatus according to claim 4, characterized by ​ 6. The pipe internal surface cleaning apparatus according to claim 5, characterized by ​ 7. The pipe internal surface cleaning apparatus according to claim 6, characterized by The exhaust holes (132) penetrate the peripheral wall of the adapter pipe (13) and communicate with the second chamber, and the exhaust holes (132) are multiple and arranged along the circumference of the adapter pipe (13) at intervals.

8. The pipe internal surface cleaning apparatus according to claim 3, characterized by The pulse cleaning device further comprises a first quick connecting hose (17), one end of the first quick connecting hose (17) communicates with the third branch pipe (53), and the other end of the first quick connecting hose (17) communicates with the first end of the pipeline (19); The backflow device further comprises a second quick connecting hose (18), one end of the second quick connecting hose (18) communicates with the gas-liquid input end, and the other end of the second quick connecting hose (18) communicates with the second end of the pipeline (19).

9. The pipe internal surface cleaning apparatus according to claim 4, characterized by The pipeline inner surface cleaning equipment further comprises: A base (14) is provided with a water receiving groove (141) with an upward opening, and part of the liquid return pipe (12) is located in the water receiving groove (141); A supporting protrusion (15) is arranged in the water receiving groove (141) and used for supporting the pipeline (19); A quick connector (16) is installed on the pipe wall of the liquid return pipe (12) and located in the water receiving groove (141), and the quick connector (16) is used for communicating with the second end of the pipeline (19).

10. A pipe internal surface cleaning apparatus according to any one of claims 2 to 9, wherein An observation window (101) extending in the height direction is arranged on the side wall of the cleaning box (1).

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