A continuous mold core cooling and cleaning system for pipe forming

Abstract

The application relates to a continuous mold core cooling and cleaning system for pipe forming, and belongs to the technical field of pipe production equipment. The system comprises a core rod and a cooling system. The cooling system comprises a cooling box for containing cooling water. The cooling system further comprises a first circulating pipeline for driving the cooling water in the cooling box to enter the core rod and then return to the cooling box. The cleaning system further comprises an acid box for containing an acid solution and a second circulating pipeline for driving the acid solution to enter the core rod and then return to the acid box. The first circulating pipeline and the second circulating pipeline are two sets of independent pipelines. When the first circulating pipeline is conveying the cooling water, the second circulating pipeline is in a closed state. The application has the advantage of improving the cooling effect of the core rod on the inner wall of the pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe production equipment, in particular to a mold core cooling and cleaning system for continuous pipe forming. BACKGROUND

[0002] Steel-plastic composite pipes have been widely used in the fields of oil, natural gas and water supply due to their good performance. The structure of the steel-plastic composite pipe is that the middle layer is a steel strip layer, and the inner and outer layers are plastic layers.

[0003] At present, a pipe forming mold is disclosed in a patent document with the authorization announcement number CN208697902U. The pipe forming mold comprises a mold frame, a mold core fixed on the mold frame, and a mold cavity sleeved outside the mold core. The middle part of the mold core is provided with a feeding hole for the passage of a perforated steel strip pipe. A first ring groove is arranged around the mold core near the end of the mold frame on the mold core. A second ring groove is arranged around the mold core away from the end of the mold frame on the mold core. A plurality of communication grooves are arranged between the first ring groove and the second ring groove and are uniformly distributed on the outer wall of the mold core. A connecting flow channel is arranged on the mold cavity for connecting the extruder and the first ring groove. The cross-sectional area of the communication groove is less than 1 / 6 of the cross-sectional area of the first ring groove. A garland is arranged at the end of the mold core away from the connecting flow channel. A material ring is installed on the mold cavity and arranged around the garland. A positioning hole is arranged in the middle of the garland for the passage of the perforated steel strip pipe. The positioning hole is in communication with the feeding hole. An extrusion flow channel for extruding molten plastic is formed between the material ring and the garland. The extrusion flow channel is in communication with the second ring groove. A core rod is installed at the center of the garland. The perforated steel strip pipe is located between the garland and the core rod. A coating cavity for filling molten plastic on the inner and outer sidewall surfaces of the perforated steel strip pipe is formed between the core rod and the material ring. The coating cavity is in communication with the extrusion flow channel.

[0004] During the production of steel-plastic composite pipes, plastic is injected onto the steel pipe through an injection mold. During use, the steel pipe is inserted into the injection mold, and the molten plastic is attached to the inner and outer surfaces of the steel pipe through an injection molding machine. After the plastic is attached to the inner and outer surfaces of the steel pipe, it needs to be cooled to allow the plastic to cool and solidify on the inner and outer surfaces of the steel pipe. Currently, the plastic is cooled by introducing the pipe material into a water tank for cooling. However, since the pipe material is produced continuously, the cooling medium such as water cannot enter the interior of the pipe material for cooling, ultimately resulting in poor inner layer forming effect of the steel-plastic composite pipe. Therefore, a core rod needs to be arranged inside the injection mold at the interior of the steel pipe. The injected plastic will contact the core rod during injection molding. By introducing flowing cold water into the core rod, the core rod can be cooled, which greatly improves the quality of the pipe material after forming.

[0005] According to the related technology in the above, the inventors believe that the cooling water in the core rod is easily attached with a large amount of scale after being heated, which causes poor cooling effect of the core rod. SUMMARY

[0006] In order to improve the cooling effect of the mandrel on the inner wall of the pipe, the application provides a continuous pipe forming mold core cooling and cleaning system.

[0007] The continuous pipe forming mold core cooling and cleaning system provided by the application adopts the following technical scheme:

[0008] A continuous pipe forming mold core cooling and cleaning system, comprising a mandrel and a cooling system, wherein the cooling system comprises a cooling tank for containing cooling water, and further comprises a first circulating pipeline for driving the cooling water in the cooling tank to enter the mandrel and then return to the cooling tank; the cleaning system further comprises an acid tank for containing an acid solution and a second circulating pipeline for driving the acid solution to enter the mandrel and then return to the acid tank; the first and second circulating pipelines are two independent pipelines, and when the first circulating pipeline is conveying cooling water, the second circulating pipeline is in a closed state.

[0009] By adopting the above technical scheme, in the pipe production process, the cooling water in the cooling tank enters the mandrel through the first circulating pipeline, the cooling water in the mandrel cools the inner wall of the pipe, and the cooled cooling water returns to the cooling tank through the first circulating pipeline; during long-term use, calcium and other impurities in the cooling water are deposited on the inner wall of the mandrel, which reduces the cooling and conveying effect of the cooling water and the heat conduction effect of the mandrel; at this time, the first circulating pipeline is disconnected, the acid solution in the acid tank enters the mandrel through the second circulating pipeline, and the impurities deposited in the mandrel are melted; at the same time, under the impact of the acid solution, the impurities are separated from the mandrel, and the acid solution returns to the acid tank through the second circulating pipeline; after the impurities in the mandrel are dissolved, the cooling effect of the cooling water in the mandrel on the inner wall of the pipe is improved; the first and second circulating pipelines are two independent pipelines, which reduces the possibility of mixing of the acid solution and the cooling water, reduces the possibility of a large decrease in the concentration of the acid solution, and reduces the possibility of an increase in the acidity of the cooling water, thereby reducing the possibility of damage to the mandrel in an acidic environment for a long time.

[0010] Optionally, the mandrel comprises a water inlet pipe and a water return pipe, the water inlet pipe is sleeved in the water return pipe, the inner wall of the pipe is supported on the water return pipe, the water return pipe is closed at both ends, the water inlet pipe is open at both ends, and the water inlet end of the water inlet pipe is located outside the water return pipe; the first circulating pipeline comprises a first pipe in communication with the water inlet pipe and a second pipe in communication with the water return pipe, the first pipe and the second pipe are both in communication with the cooling tank, the cooling water in the cooling tank enters the water return pipe through the first pipe and returns to the cooling tank through the second pipe; the second circulating pipeline comprises a third pipe in communication with the water inlet pipe and a fourth pipe in communication with the water return pipe, the third pipe and the fourth pipe are both in communication with the acid tank, the acid solution in the acid tank enters the water inlet pipe through the third pipe and enters the fourth pipe through the water return pipe and returns to the acid tank.

[0011] By adopting the above technical scheme, the cooling water in the cooling tank enters the water inlet pipe through the first pipe, the cooling water in the water inlet pipe enters the water return pipe, the cooling water in the water return pipe returns to the cooling tank through the second pipe, and the circulation of the cooling water is completed; when removing impurities in the water inlet pipe and the water return pipe, the acid solution in the acid tank enters the water inlet pipe through the third pipe, the acid solution in the water inlet pipe enters the water return pipe, the acid solution in the water return pipe returns to the acid tank through the fourth pipe, and the removal of scale is completed, which is simple and convenient to operate.

[0012] Optionally, a first spiral scraper is rotatably arranged in the water inlet pipe, the rotation axis of the first spiral scraper is parallel to the length direction of the water inlet pipe, the first spiral scraper abuts against the inner wall of the water inlet pipe, and the first spiral scraper rotates to scrape off the impurities on the inner wall of the water inlet pipe.

[0013] By adopting the above technical scheme, when the cooling water or the acid solution flows in the water inlet pipe, the first spiral scraper is driven to rotate by the first driving member, and in the rotating process of the first spiral scraper, the first spiral scraper abuts against the inner wall of the water inlet pipe, thereby reducing the possibility of impurities adhering to the inner wall of the water inlet pipe; at the same time, when the cooling water or the acid solution flows in the water inlet pipe, the first spiral scraper scrapes off the impurities, and after the impurities are scraped off, they are removed from the water inlet pipe under the impact of the cooling water and the acid solution; under the action of the first spiral scraper, the cleaning effect of the impurities and scale is improved, and the cooling effect of the mandrel on the pipe is improved.

[0014] Optionally, a second spiral scraper is rotatably arranged on the outer wall of the water inlet pipe, the length direction of the second spiral scraper is parallel to the length direction of the water inlet pipe, the second spiral scraper rotates about the axis of the water inlet pipe, the second spiral scraper abuts against the inner wall of the water return pipe, the second spiral scraper rotates to scrape off the impurities on the inner wall of the water return pipe, and the cleaning system further comprises a second driving member for driving the second spiral scraper to rotate.

[0015] By adopting the technical scheme, when the cooling water or the acid solution flows in the return pipe, the second spiral scraper is driven to rotate by the second driving member, the rotation of the second spiral scraper cleans the inner wall of the return pipe, the impurities and the scale are separated from the inner wall of the return pipe, the cleaning effect of the impurities is improved, and the cooling effect of the mandrel on the pipeline is improved.

[0016] Optionally, the water inlet pipe is provided with a fifth pipeline, the first pipeline and the third pipeline are located on two sides of the fifth pipeline and are in communication with the fifth pipeline, and the fifth pipeline is provided with an air charging pump.

[0017] By adopting the technical scheme, when the first circulation pipeline and the second circulation pipeline are switched, the cooling water remaining in the water inlet pipe and the return pipe enters the acid tank, and the acid solution remaining in the water inlet pipe and the return pipe enters the cooling tank, so that the solution in the cooling tank and the acid tank is out of acid balance, thereby reducing the cleaning effect of the acid solution on the scale; at the same time, the acid concentration of the cooling water gradually increases, and the corrosion of the cooling water on the water inlet pipe and the return pipe is greater; before the first circulation pipeline and the second circulation pipeline are switched, the air charging pump is started, the air charging pump pressurizes the water inlet pipe and the return pipe through the fifth pipeline, and then the solution remaining in the water inlet pipe and the return pipe returns to the corresponding acid tank or cooling tank, thereby reducing the possibility of mixing of the cooling water and the acid solution, improving the cleaning effect of the scale, and reducing the possibility of corrosion of the water inlet pipe and the return pipe.

[0018] Optionally, the cleaning system further comprises a material adding tank, the material adding tank is used for containing the acid solution, the concentration of the acid solution in the material adding tank is greater than that of the acid solution in the acid tank, the material adding tank is in communication with the acid tank, and the cleaning system further comprises a communication member, the communication member is used for adding the solution in the material adding tank into the acid tank after the concentration of the solution in the acid tank decreases.

[0019] By adopting the technical scheme, the solution in the water inlet pipe and the return pipe is pressed out by air and returned to the corresponding cooling tank or acid tank, but part of the cooling water remains in the inner wall of the water inlet pipe and the return pipe, over a long period of time, the cooling water in the acid solution gradually increases, the concentration of the acid solution gradually decreases, and the cleaning effect on the scale is poor; when the concentration of the acid solution decreases, the material adding tank is communicated with the acid tank through the communication member, the high-concentration solution in the material adding tank enters the acid tank, so that the concentration of the solution in the acid tank is increased, and the cleaning effect on the scale is improved.

[0020] Optionally, the communication member comprises a sixth pipeline for communicating the material box and the acid box, a closing plate is slidably arranged in the acid box, the closing plate is used for separating the material box and the acid box, and the communication member further comprises a third driving member, which is used for driving the closing plate to slide and make the acid box and the material box communicate with each other when the concentration of the solution in the acid box decreases.

[0021] By using the above technical scheme, when the concentration of the solution in the acid box decreases, the closing plate is driven to slide under the action of the third driving member, the sliding of the closing plate opens the communication between the material box and the acid box, and the high-concentration acid solution in the material box enters the acid box, so as to increase the concentration of the solution in the acid box.

[0022] Optionally, the third driving member comprises a first motor arranged on the side wall of the acid box, a lead screw is arranged on the output shaft of the first motor, the closing plate is threadedly connected to the lead screw, a battery is arranged on the acid box, and the first motor is electrically connected to the battery; the positive electrode of the battery is connected to a pin of the first motor, and the third driving member further comprises a communication member for electrically connecting the negative electrode of the battery and another pin of the first motor when the solution in the acid box decreases.

[0023] By using the above technical scheme, when the concentration of the solution in the acid box decreases, the negative electrode of the battery is electrically connected to the other pin of the first motor under the action of the communication member, at this time, the battery is electrically connected to the first motor, the first motor is powered to drive the lead screw to rotate, the lead screw drives the closing plate to slide, and the closing plate slides to communicate the sixth pipeline with the acid box, so that the operation is simple and convenient.

[0024] Optionally, the communication member comprises a float floating on the liquid surface of the solution in the acid box, a conductive needle is arranged on the surface of the float away from the liquid surface, a first connecting wire for connecting the battery is arranged on the conductive needle, a second connecting wire for connecting the other pin of the first motor is arranged in the solution in the acid box, and the first motor is in electrical communication with the battery after the conductive needle is inserted into the solution.

[0025] By using the above technical scheme, when the cooling water enters the acid solution, the concentration of the acid solution decreases, and when the concentration of the acid solution decreases, the density of the acid solution decreases, so that the buoyancy of the acid solution on the float decreases, the float descends after the buoyancy decreases, the conductive needle descends after the float descends, the conductive needle is inserted into the acid solution, the electrical connection between the first connecting wire and the second connecting wire is completed, and the operation is simple and convenient; when the concentration of the acid solution gradually increases, the buoyancy of the acid solution on the float increases, the conductive needle rises and separates from the solution, at this time, the first motor is started to drive the closing plate to slide and close the communication of the sixth pipeline.

[0026] Optionally, the acid tank is provided with a guide rod, the length direction of the guide rod is parallel to the depth direction of the acid tank, and the float slides on the guide rod.

[0027] By adopting the technical scheme, under the action of the guide rod, the float slides along the guide rod, and the float is less likely to float greatly with the solution under the action of the guide rod, and the first motor is less likely to be started by mistake.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. In the pipe production process, the cooling water in the cooling tank enters the mandrel through the first circulating pipeline, the cooling water entering the mandrel cools the inner wall of the pipe, and the cooled cooling water returns to the cooling tank through the first circulating pipeline; during long-term use, calcium and other impurities in the cooling water adhere to the inner wall of the mandrel, which reduces the cooling and heat conduction effect of the cooling water on the pipe; at this time, the first circulating pipeline is disconnected, the acid solution in the acid tank enters the mandrel through the second circulating pipeline, and the impurities deposited in the mandrel are melted, and at the same time, the impurities are separated from the mandrel under the impact of the acid solution, and the acid solution returns to the acid tank through the second circulating pipeline; after the impurities in the mandrel are dissolved, the cooling effect of the cooling water in the mandrel on the inner wall of the pipe is improved.

[0030] 2. The first circulating pipeline and the second circulating pipeline are two independent pipelines, which reduces the possibility of mixing of the acid solution and the cooling water, reduces the possibility of a large decrease in the concentration of the acid solution, and at the same time, reduces the possibility of an increase in the acid concentration of the cooling water, thereby reducing the possibility of damage to the mandrel in the acid environment for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a whole structure schematic view of a continuous pipe forming mold core cooling and cleaning system according to an embodiment of the present application;

[0032] Figure 2 is a sectional view of a pipe inlet and a water return pipe in a continuous pipe forming mold core cooling and cleaning system according to an embodiment of the present application;

[0033] Figure 3 is a sectional view of an acid tank in a continuous pipe forming mold core cooling and cleaning system according to an embodiment of the present application;

[0034] Figure 4 is Figure 2 is an enlarged view of part A in FIG. 6;

[0035] Figure 5 is Figure 2 is an enlarged view of part B in FIG. 6;

[0036] Figure 6 is a test diagram of the acid tank in the mold core cooling and cleaning system for continuous pipe forming.

[0037] Explanation of reference numerals: 1, core rod; 11, water inlet pipe; 12, water return pipe;

[0038] 2, cooling system; 21, cooling tank; 22, first water pump; 23, first circulation pipeline; 231, first pipeline; 232, second pipeline;

[0039] 3, acid tank;

[0040] 4, second circulation pipeline; 41, third pipeline; 42, fourth pipeline;

[0041] 5, second water pump; 6, first spiral scraper; 7, first driving rod; 8, spiral propeller blade; 9, second spiral scraper; 10, mounting cylinder; 13, first gear; 14, water inlet; 15, gear ring; 16, fifth pipeline; 17, air pump; 18, material adding tank; 19, sixth pipeline; 20, closing plate; 24, first motor; 25, lead screw; 26, battery; 27, third connecting wire; 28, float; 29, conductive needle; 30, first connecting wire; 31, second connecting wire; 32, guide rod; 33, valve. DETAILED DESCRIPTION

[0042] The following will be described in detail with reference to the accompanying drawings. Figures 1-6 The present application will be further described in detail.

[0043] The present application discloses a mold core cooling and cleaning system for continuous pipe forming. Referring to Figure 1 and Figure 2 , the mold core cooling and cleaning system for continuous pipe forming comprises a core rod 1 and a cooling system 2, the cooling system 2 comprises a cooling tank 21 for containing cooling water, and in combination Figure 3 , the cooling tank 21 is provided with a first water pump 22, the first water pump 22 is immersed in the cooling water, and the cooling system 2 further comprises a first circulation pipeline 23, the first water pump 22 is used to drive the cooling water into the first circulation pipeline 23, and the first circulation pipeline 23 is used to drive the cooling water in the cooling tank 21 to enter the core rod 1 and then return to the cooling tank 21; when the core rod 1 is cooled, the first water pump 22 is started, the first water pump 22 draws the cooling water into the first circulation pipeline 23, the cooling water in the first circulation pipeline 23 enters the core rod 1, the core rod 1 cools the inner wall of the pipe, and returns to the cooling tank 21 through the first circulation pipeline 23.

[0044] Referring to Figure 1, the cooling water in the core rod 1 is prone to scale formation during long-term circulation, which is prone to cause the core rod 1 to be blocked and the cooling effect of the core rod 1 on the inner wall of the pipeline to be poor; in order to improve the cooling effect of the core rod 1 on the inner wall of the pipeline, the cleaning system further comprises an acid tank 3 for containing an acidic solution and a second circulating pipeline 4, in the embodiment of the application, the acidic solution is an acetic acid solution or a dilute hydrochloric acid solution, further, the acid tank 3 is provided with a second water pump 5, the second water pump 5 drives the acidic solution into the second circulating pipeline 4, and the second circulating pipeline 4 is used to drive the acidic solution into the core rod 1 and then return to the acid tank 3; when the pipeline is suspended for processing, the second water pump 5 is started, the second water pump 5 draws the acidic solution into the second circulating pipeline 4, the acidic solution in the second circulating pipeline 4 enters the core rod 1, the acidic solution entering the core rod 1 dissolves the scale, and under the driving of the acidic solution, returns to the acid tank 3; after the acidic solution passes through the core rod 1, the scale in the core rod 1 is eliminated, and the cooling effect of the core rod 1 on the inner wall of the pipeline is improved.

[0045] Referring to Figure 1 In the embodiment of the application, the first circulating pipeline 23 and the second circulating pipeline 4 are two independent pipelines, when the first circulating pipeline 23 transports cooling water, the second circulating pipeline 4 is in a closed state; the first circulating pipeline 23 and the second circulating pipeline 4 are independent pipelines, which reduces the possibility of mixing of the acidic solution and the cooling water.

[0046] Referring to Figure 1 and Figure 2 In the embodiment of the application, the core rod 1 comprises a water inlet pipe 11 and a water return pipe 12, the water inlet pipe 11 is sleeved in the water return pipe 12, and the inner wall of the pipeline is supported on the water return pipe 12, in the embodiment of the application, the water inlet pipe 11 and the water return pipe 12 are both hard pipes and straight pipes, the two ends of the water return pipe 12 are closed, and the two ends of the water inlet pipe 11 are open, the water inlet end of the water inlet pipe 11 is located outside the water return pipe 12; the cooling water is communicated with the water inlet pipe 11, flows to one end of the water inlet pipe 11, and enters the water return pipe 12, and then flows out through the gap between the water inlet pipe 11 and the water return pipe 12 and returns to the cooling tank 21.

[0047] Referring to Figure 1 and Figure 2Further, the first circulating pipeline 23 comprises a first pipeline 231 communicated with the water inlet pipe 11 and a second pipeline 232 communicated with the water return pipe 12, the first pipeline 231 and the second pipeline 232 are both communicated with the cooling tank 21, the cooling water in the cooling tank 21 enters the water return pipe 12 through the first pipeline 231 and returns to the cooling tank 21 through the second pipeline 232, the first pipeline 231 and the second pipeline 232 are both corrosion-resistant pipelines, further, the first pipeline 231 is communicated with the water inlet end of the first water pump 22; starting the first water pump 22, the first water pump 22 draws the cooling water into the first pipeline 231, then into the water inlet pipe 11, then into the water return pipe 12, and then returns to the second pipeline 232, and then returns to the cooling tank 21.

[0048] With reference to Figure 1 and Figure 2 The second circulating pipeline 4 comprises a third pipeline 41 communicated with the water inlet pipe 11 and a fourth pipeline 42 communicated with the water return pipe 12, the third pipeline 41 and the fourth pipeline 42 are both communicated with the acid tank 3, the third pipeline 41 and the fourth pipeline 42 are both corrosion-resistant pipelines, further, the third pipeline 41 is communicated with the water inlet end of the second water pump 5, the acid solution in the acid tank 3 enters the water inlet pipe 11 through the third pipeline 41 and enters the fourth pipeline 42 through the water return pipe 12 to return to the acid tank 3; starting the second water pump 5, the second water pump 5 draws the acid solution into the third pipeline 41, then into the water inlet pipe 11, the acid solution in the water inlet pipe 11 enters the water return pipe 12, then returns to the fourth pipeline 42, and finally returns to the acid tank 3.

[0049] With reference to Figure 2 and Figure 4 To improve the cleaning effect of the scale in the water inlet pipe 11, a first spiral scraper 6 is rotatably arranged in the water inlet pipe 11, the rotation axis of the first spiral scraper 6 is parallel to the length direction of the water inlet pipe 11, the first spiral scraper 6 abuts against the inner wall of the water inlet pipe 11, the first spiral scraper 6 rotates to scrape off the impurities on the inner wall of the water inlet pipe 11, the cleaning system further comprises a first driving member for driving the first spiral scraper 6 to rotate, in the embodiment, a first driving rod 7 is coaxially arranged in the water inlet pipe 11, the first spiral scraper 6 is fixedly arranged on the first driving rod 7, the first driving member comprises a spiral blade 8 arranged on the first driving rod 7, the spiral blade 8 is located on the side of the first driving rod 7 close to the water inlet end of the water inlet pipe 11, when the solution in the water inlet pipe 11 flows, it impacts on the spiral blade 8, drives the spiral blade 8 and the first driving rod 7 to rotate, and further drives the first spiral scraper 6 to rotate, the first spiral scraper 6 rotates to scrape off the scale adhered to the inner wall of the water inlet pipe 11, which is simple and convenient to operate.

[0050] With reference to Figure 2 and Figure 5The outer wall of the water inlet pipe 11 is rotationally provided with a second spiral scraper 9, the length direction of the second spiral scraper 9 is parallel to the length direction of the water inlet pipe 11, the second spiral scraper 9 rotates around the axis of the water inlet pipe 11, the mounting cylinder 10 is sleeved on the water inlet pipe 11, the mounting cylinder 10 is rotationally arranged on the water inlet pipe 11, the second spiral scraper 9 is fixedly arranged on the mounting cylinder 10, the second spiral scraper 9 abuts against the inner wall of the water return pipe 12, the second spiral scraper 9 rotates to scrape off the impurities on the inner wall of the water return pipe 12, the cleaning system further comprises a second driving member for driving the second spiral scraper 9 to rotate, in the embodiment of the application, the second driving member comprises a first gear 13 coaxially arranged on the first driving rod 7, a plurality of water passages 14 are formed in the first gear 13, and the inner wall of the mounting cylinder 10 is fixedly provided with a gear ring 15 engaged with the first gear 13; the first driving rod 7 drives the first gear 13 to rotate, the first gear 13 drives the mounting cylinder 10 to rotate, and then drives the second spiral scraper 9 to rotate, so that the operation is simple and convenient.

[0051] With reference to Figure 1 and Figure 2 To further reduce the possibility of mixing a large amount of cooling water and acid solution, the water inlet pipe 11 is provided with a fifth pipe 16, the first pipe 231 and the third pipe 41 are located on both sides of the fifth pipe 16, in the embodiment of the application, the fifth pipe 16 is a straight pipe, and the first pipe 231 and the third pipe 41 are both in communication with the fifth pipe 16, the fifth pipe 16 is provided with an air charging pump 17, the fifth pipe 16 is connected to the air outlet end of the air charging pump 17, and the air charging pump 17 is used to drive the liquid in the water inlet pipe 11 and the water return pipe 12 to return to the cooling tank 21 or the acid tank 3 when the pipeline is switched. Before switching the pipeline, the air charging pump 17 is started, the air charging pump 17 draws external air into the first pipe 231 or the third pipe 41 through the fifth pipe 16, and then the air enters the water inlet pipe 11 and the water return pipe 12, drives the solution in the water inlet pipe 11 and the water return pipe 12 to return to the acid tank 3 or the cooling tank 21, so as to reduce the solution in the water inlet pipe 11 and the water return pipe 12 from returning to the acid tank 3 or the cooling tank 21 which does not correspond thereto.

[0052] With reference to Figure 2, the inevitable residual solution in the inner wall of the water inlet pipe 11 and the backwater pipe 12 after the solution in the water inlet pipe 11 and the backwater pipe 12 is returned to the corresponding acid tank 3 or the cooling tank 21 by air, when the cooling water enters the acid tank 3, the concentration of the acid solution is reduced, and after a long time, the dissolution effect on the scale is general; in order to ensure the dissolution effect of the acid solution on the scale, the cleaning system further comprises a feeding tank 18, in the embodiment of the application, the feeding tank 18 is located on one side of the acid tank 3, the feeding tank 18 is used for containing the acid solution, the concentration of the acid solution in the feeding tank 18 is greater than that in the acid tank 3, the feeding tank 18 is in communication with the acid tank 3, and the cleaning system further comprises a communication member, which is used for adding solution into the acid tank 3 after the concentration of the solution in the acid tank 3 is reduced;

[0053] With reference to Figure 3 , the communication member comprises a sixth pipeline 19 for communicating the feeding tank 18 and the acid tank 3, the sixth pipeline 19 is a corrosion-resistant pipeline, a closing plate 20 is slidably arranged in the acid tank 3, the closing plate 20 is located on the inner wall of the acid tank 3, the closing plate 20 is used for separating the feeding tank 18 and the acid tank 3, and further, the closing plate 20 is used for separating the communication position of the sixth pipeline 19 and the acid tank 3, the communication member further comprises a third driving member, which is used for driving the closing plate 20 to slide to make the acid tank 3 and the feeding tank 18 communicate after the concentration of the solution in the acid tank 3 is reduced;

[0054] With reference to Figure 3 and Figure 6 , the third driving member comprises a first motor 24 arranged on the side wall of the acid tank 3, the first motor 24 is located above the liquid level of the acid tank 3, further, the length direction of the output shaft of the first motor 24 is parallel to the bottom wall of the acid tank 3, a lead screw 25 is arranged on the output shaft of the first motor 24, the closing plate 20 is threadedly connected to the lead screw 25, a battery 26 is arranged on the acid tank 3, and the first motor 24 is electrically connected to the battery 26; the positive electrode of the battery 26 is connected to the pin of the first motor 24, further, the positive electrode of the battery 26 and the pin of the first motor 24 are connected through a third connecting wire 27, and the third driving member further comprises a communication member for electrically connecting the negative electrode of the battery 26 and another pin of the first motor 24 when the solution in the acid tank 3 is lowered;

[0055] With reference to Figure 3 and Figure 6The connecting piece includes a float 28 floating on the solution surface of the acid tank 3. In the embodiment, the float 28 floats on the solution surface, and a conductive needle 29 is arranged on the surface of the float 28 away from the solution surface. The float 28 is fixedly provided with a mounting rack, and the conductive needle 29 is fixedly arranged on the mounting rack. The conductive needle 29 is provided with a first connecting wire 30 for connecting the negative electrode of the battery 26. The acid tank 3 is provided with a second connecting wire 31 for connecting another pin of the first motor 24 in the solution. After the conductive needle 29 is inserted into the solution, the first motor 24 is in electrical connection with the battery 26.

[0056] When the concentration of the solution in the acid tank 3 decreases, the buoyancy acting on the float 28 decreases. After the buoyancy of the solution acting on the float 28 decreases, the float 28 sinks to discharge more solution to maintain the balance of the float 28. At this time, the relative distance between the top surface of the float 28 and the solution surface decreases, and the conductive needle 29 descends. After the conductive needle 29 is inserted into the solution, the battery 26 is in electrical connection with the first motor 24. The first motor 24 drives the screw rod 25 to rotate, and the screw rod 25 drives the closing plate 20 to slide. The acid tank 3 is in communication with the material tank 18, and the acid solution in the material tank 18 enters the acid tank 3 to complete the solution addition. The operation is simple and convenient.

[0057] Referring to Figure 3 and Figure 6 To reduce the possibility that the float 28 greatly fluctuates with the solution and causes the conductive needle 29 to be inserted into the solution by mistake, the acid tank 3 is provided with a guide rod 32. The length direction of the guide rod 32 is parallel to the depth direction of the acid tank 3, and the float 28 slides on the guide rod 32. The guide rod 32 limits the float 28 to reduce the possibility that the float 28 greatly fluctuates.

[0058] Further, to facilitate the closing of the sixth pipeline 19, the acid tank 3 is provided with a power supply. The power supply is in electrical connection with the first motor 24. When the concentration of the solution in the acid tank 3 gradually increases, the conductive needle 29 is separated from the solution, and the battery 26 is disconnected from the first motor 24. At this time, the first motor 24 is started to rotate reversely. The first motor 24 drives the screw rod 25 to rotate to drive the closing plate 20 to slide to close the sixth pipeline 19.

[0059] Referring to Figure 1 In the embodiment, the first pipeline 231, the second pipeline 232, the third pipeline 41, the fourth pipeline 42 and the fifth pipeline 16 are all provided with valves 33. When the pipeline is switched, the corresponding pipelines are closed by the valves 33 to facilitate the cleaning of the water scale in the water inlet pipe 11 and the backwater pipe 12.

[0060] The implementation principle of the continuous pipeline forming mold core cooling and cleaning system is as follows.

[0061] In the pipe production process, the inner wall of the pipe is cooled, at this time, the valves 33 on the third pipe 41, the fourth pipe 42 and the fifth pipe 16 are closed, the first water pump 22 is started, the first water pump 22 draws the cooling water in the cooling tank 21 into the first pipe 231, and then into the water inlet pipe 11, and then into the water return pipe 12, and then returns to the cooling tank 21 through the second pipe 232;

[0062] Before the pipe switching, the third pipe 41 and the fourth pipe 42 are closed, and the first pipe 231 is closed, the air pump 17 is started, the air pump 17 drives the cooling water in the water inlet pipe 11 and the water return pipe 12 to return to the cooling tank 21;

[0063] Then the first pipe 231, the second pipe 232 and the fifth pipe 16 are closed, the second water pump 5 is started, the second water pump 5 draws the acid solution through the third pipe 41 into the water inlet pipe 11 and the water return pipe 12, and then returns to the acid tank 3 through the fourth pipe 42; in this process, when the concentration of the acid solution decreases, the conductive needle 29 is lowered to immerse in the solution, the first motor 24 is started to drive the closing plate 20 to slide, the closing plate 20 slides to open the sixth pipe 19, the solution in the feeding tank 18 enters the acid tank 3, and the concentration of the solution in the acid tank 3 is increased;

[0064] Before the pipe switching to cooling, the first pipe 231, the second pipe 232 and the third pipe 41 are closed, the air pump 17 is started, the air pump 17 draws air to drive the acid solution to return to the acid tank 3;

[0065] Then the valves 33 on the third pipe 41, the fourth pipe 42 and the fifth pipe 16 are closed, the first water pump 22 is started, the first water pump 22 draws the cooling water in the cooling tank 21 into the first pipe 231, and then into the water inlet pipe 11, and then into the water return pipe 12, and then returns to the cooling tank 21 through the second pipe 232.

[0066] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A continuous mold core cooling and cleaning system for pipe forming, characterized by: The cleaning system comprises a mandrel (1) and a cooling system (2), the cooling system (2) comprises a cooling tank (21) for containing cooling water, and the cooling system (2) further comprises a first circulating pipeline (23) for driving the cooling water in the cooling tank (21) to enter the mandrel (1) and then return to the cooling tank (21); the cleaning system further comprises an acid tank (3) for containing an acid solution and a second circulating pipeline (4) for driving the acid solution to enter the mandrel (1) and then return to the acid tank (3); the first circulating pipeline (23) and the second circulating pipeline (4) are two independent pipelines, when the first circulating pipeline (23) is conveying the cooling water, the second circulating pipeline (4) is in a closed state; The mandrel (1) comprises a water inlet pipe (11) and a water return pipe (12), the water inlet pipe (11) is sleeved in the water return pipe (12), the inner wall of the pipeline is supported on the water return pipe (12), the two ends of the water return pipe (12) are closed, and the two ends of the water inlet pipe (11) are open; the water inlet end of the water inlet pipe (11) is located outside the water return pipe (12); the first circulating pipeline (23) comprises a first pipeline (231) communicating with the water inlet pipe (11) and a second pipeline (232) communicating with the water return pipe (12), the first pipeline (231) and the second pipeline (232) are both in communication with the cooling tank (21), the cooling water in the cooling tank (21) enters the water return pipe (12) through the first pipeline (231) and returns to the cooling tank (21) through the second pipeline (232); the second circulating pipeline (4) comprises a third pipeline (41) communicating with the water inlet pipe (11) and a fourth pipeline (42) communicating with the water return pipe (12), the third pipeline (41) and the fourth pipeline (42) are both in communication with the acid tank (3), the acid solution in the acid tank (3) enters the water inlet pipe (11) through the third pipeline (41) and returns to the acid tank (3) through the water return pipe (12) and the fourth pipeline (42); A first spiral scraper (6) is rotatably arranged in the water inlet pipe (11), and a second spiral scraper (9) is rotatably arranged on the outer wall of the water inlet pipe (11); A fifth pipeline (16) is arranged on the water inlet pipe (11), the first pipeline (231) and the third pipeline (41) are located on the two sides of the fifth pipeline (16) and are both in communication with the fifth pipeline (16), and an air charging pump (17) is arranged on the fifth pipeline (16); the air charging pump (17) is used to drive the liquid in the water inlet pipe (11) and the water return pipe (12) to return to the cooling tank (21) or the acid tank (3) when the pipeline is switched; The rotation axis of the first spiral scraper (6) is parallel to the length direction of the water inlet pipe (11), the first spiral scraper (6) abuts against the inner wall of the water inlet pipe (11), and the first spiral scraper (6) rotates to scrape off the impurities on the inner wall of the water inlet pipe (11); the cleaning system further comprises a first driving member for driving the first spiral scraper (6) to rotate. The length direction of the second spiral scraper (9) is parallel to the length direction of the water inlet pipe (11), the second spiral scraper (9) rotates around the axis of the water inlet pipe (11), the second spiral scraper (9) abuts against the inner wall of the water return pipe (12), the rotation of the second spiral scraper (9) scrapes off the impurities on the inner wall of the water return pipe (12), and the cleaning system further comprises a second driving member for driving the rotation of the second spiral scraper (9); The cleaning system further comprises a feeding tank (18) for containing the acidic solution, the concentration of the acidic solution in the feeding tank (18) is greater than that in the acidic tank (3), the feeding tank (18) is arranged in communication with the acidic tank (3), and the cleaning system further comprises a communication member for adding the solution into the acidic tank (3) after the concentration of the solution in the acidic tank (3) decreases.

2. A continuous mold core cooling and cleaning system for pipe forming as set forth in claim 1, wherein: The communication member comprises a sixth pipeline (19) for communicating the feeding tank (18) and the acidic tank (3), a closing plate (20) is slidably arranged in the acidic tank (3), the closing plate (20) is used to separate the feeding tank (18) and the acidic tank (3), and the communication member further comprises a third driving member for driving the closing plate (20) to slide and make the feeding tank (18) and the acidic tank (3) communicate after the concentration of the solution in the acidic tank (3) decreases.

3. A continuous mold core cooling and cleaning system for pipe forming as set forth in claim 2, wherein: The third driving member comprises a first motor (24) arranged on the side wall of the acidic tank (3), a lead screw (25) is arranged on the output shaft of the first motor (24), the closing plate (20) is threadedly connected to the lead screw (25), a battery (26) is arranged on the acidic tank (3), and the first motor (24) is electrically connected to the battery (26); the positive electrode of the battery (26) is connected to a pin of the first motor (24), and the third driving member further comprises a communication member for electrically connecting the negative electrode of the battery (26) and another pin of the first motor (24) when the solution in the acidic tank (3) decreases.

4. A continuous mold core cooling and cleaning system for pipe forming as set forth in claim 3, wherein: The communication member comprises a float (28) floating on the solution surface of the acidic tank (3), a conductive needle (29) is arranged on the surface of the float (28) away from the solution surface, a first connecting wire (30) for connecting the battery (26) is arranged on the conductive needle (29), a second connecting wire (31) for connecting another pin of the first motor (24) is arranged in the solution in the acidic tank (3), and the first motor (24) and the battery (26) are electrically connected after the conductive needle (29) is inserted into the solution.

5. A continuous mold core cooling and cleaning system for pipe forming as set forth in claim 4, wherein: A guide rod (32) is arranged in the acidic tank (3), the length direction of the guide rod (32) is parallel to the depth direction of the acidic tank (3), and the float (28) slides through the guide rod (32).

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