Double-barrel circulating pulping and paste cleaning spraying machine

Abstract

The invention discloses a double-barrel circulating pulping neat paste spraying machine, and relates to the technical field of cement neat paste spraying equipment. Comprising pulping barrels, a screw pump, a neat pulp pipeline, a nozzle and a rack, the pulping barrels comprise a pulping barrel A and a pulping barrel B, pulp outlets of the two pulping barrels are connected with a pulp inlet of the screw pump, and a pulp outlet of the screw pump is connected with the nozzle through a pipeline; after the slurrying barrel A completes slurrying, the screw pump conveys slurry to the nozzle, and the nozzle mixes the slurry with high-pressure air for spraying operation; and when the amount of the neat cement paste in the slurrying barrel A is lower than the set paste amount, the slurrying barrel B starts slurrying, and when the amount of the paste in the slurrying barrel A is lower than the switching amount, the slurrying barrel B supplies the paste, and the nozzle continuously performs spraying operation. The two slurrying barrels are used for circularly slurrying, the slurry spraying continuity is guaranteed, the slurry spraying efficiency is improved, full stirring of cement paste is guaranteed, the screw pump and the pipeline are automatically cleaned through the water-gas mixture, cleaning is cleaner and more thorough, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cement paste spraying equipment, and specifically refers to a double-barrel circulating pulp-making cement paste spraying machine. Background Art

[0002] Prestressed concrete cylinder pipes (PCCP) are widely used in major water diversion and water supply pipeline construction projects due to their excellent characteristics of large diameter, high working pressure, deep burial, and long distance. The durability of the prestressed high-strength steel wires wound on the PCCP pipe core directly affects the structural safety of the PCCP. The national standard requires spraying cement paste (mud) with a specified water-cement ratio during wire winding to provide the first effective protection for the surface of the steel wires. The water-binder ratio of the cement paste on the surface of the steel wires is 0.625, which has a strong viscosity and a very fast setting speed. The mixed mud will start to set after more than 45 minutes, generating mud residues, which will affect the quality of the mud. If the cleaning is not timely and thorough, it will solidify on the inner wall of the pulp-making barrel or the pulp pipeline, causing blockage. Currently, the cleaning of the pulp-making barrel is generally done manually, which is not only difficult to clean, but also prone to incomplete and inadequate cleaning. At the same time, the screw pump for transporting the mud is generally placed horizontally, and there is a gap between the lower part of the conveying rod and the barrel wall. Since the mud has a high specific gravity, it is easy to deposit on the barrel wall, and the screw pump is not easy to clean. Over time, a thick layer of mud will solidify on the lower part of the barrel wall, affecting the transportation of the mud and easily generating mud residues, blocking the pulp pipeline.

[0003] In the prior art, a set of spraying equipment can only make one barrel of mud at a time, unable to achieve continuous spraying operation, greatly affecting the spraying operation efficiency. For a single pulp-making barrel, there will inevitably be remaining mud after each use of the pulp (usually 15 to 20 minutes). Recycling cannot guarantee the quality of the mud, and discarding it once will cause mud waste and environmental pollution. At the same time, for a single pulp-making barrel, in order to shorten the spraying interval, the pulp-making time is often sacrificed, resulting in insufficient mixing of the mud and a decline in the quality of the mud. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a double-barrel circulating pulp-making cement paste spraying machine, which uses two pulp-making barrels to circulate and make pulp, realizes continuous spraying operation, greatly improves the spraying efficiency; intermittent pulp-making can fully stir the cement paste to ensure the quality of the cement paste. After the spraying is completed, the screw pump and the pipeline can be automatically cleaned by using a water-gas mixture, enhancing the scouring ability, cleaning more cleanly and thoroughly, and also reducing the labor intensity of workers.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A double-barrel circulating pulping and neat pulp spraying machine, including a pulping barrel, a screw pump, several pipelines, a nozzle, and a frame. The pulping barrel and the screw pump are both installed on the frame. The pulping barrel includes a pulping barrel A and a pulping barrel B. The slurry outlets of the two pulping barrels are both connected to the slurry inlet of the screw pump. The slurry outlet of the screw pump is connected to the slurry inlet of the nozzle through a slurry spraying pipe, and the air inlet of the nozzle is connected to a gas source. After the pulping in the pulping barrel A is completed, the screw pump transports the slurry to the nozzle. The slurry is mixed with gas at the nozzle and is sprayed onto the surface of the slurry-receiving body. During the spraying process, when the amount of slurry in the pulping barrel A is lower than the set amount of slurry, the pulping barrel B starts pulping and continues to stir after the pulping is completed. When the amount of slurry in the pulping barrel A is lower than the set amount of slurry, the pulping barrel A stops supplying slurry, and the pulping barrel B starts supplying slurry. The pulping barrel A and the pulping barrel B supply slurry in a cycle, and the nozzle continuously carries out spraying operations without interruption.

[0006] Preferably, the slurry outlet of the pulping barrel A is connected to the inlet of the second pneumatic butterfly valve through a pipeline. The outlet of the second pneumatic butterfly valve is connected to the inlet of the first pneumatic butterfly valve through a pipeline, and the outlet of the first pneumatic butterfly valve is connected to a waste slurry tank. The slurry outlet of the pulping barrel B is connected to the inlet of the fourth pneumatic butterfly valve through a pipeline. The outlet of the fourth pneumatic butterfly valve is connected to the inlet of the third pneumatic butterfly valve through a pipeline, and the outlet of the third pneumatic butterfly valve is connected to a waste slurry tank. The first inlet of the ball valve is connected to the pipeline between the first pneumatic butterfly valve and the second pneumatic butterfly valve. The second inlet of the ball valve is connected to the pipeline between the third pneumatic butterfly valve and the fourth pneumatic butterfly valve. The outlet of the ball valve is connected to the slurry inlet of the screw pump through a pipeline. Each of the four pneumatic butterfly valves and the ball valve is respectively connected to a cylinder.

[0007] Preferably, the screw pump is erected. A second cleaning port is provided at the upper part of the screw pump, and a first cleaning port is provided at the bottom. A third cleaning port is provided at the first inlet of the ball valve, and a fourth cleaning port is provided at the second inlet of the ball valve.

[0008] Preferably, the five cylinders are all connected to a double-electric double-control three-position five-way valve, and the double-electric double-control three-position five-way valve is supplied with gas by a gas source.

[0009] Preferably, the neat pulp spraying machine further includes a water-gas mixing system. The water-gas mixture output by the water-gas mixing system can clean the screw pump, the pipeline between the two pulping barrels and the screw pump, the slurry pipe between the screw pump and the nozzle, and the nozzle. The water-gas mixing system can also perform water cleaning on the two pulping barrels.

[0010] Preferably, the water-gas mixing system includes a gas source, a water source, a first pipeline, a second pipeline, several gas paths, and several water paths. The first pipeline is connected to the gas source, and several gas paths are connected in parallel to the first pipeline. The second pipeline is connected to the water source, and several water paths are connected in parallel to the second pipeline. Each gas path is connected to a water path through a first three-way joint, and the third port of the first three-way joint outputs the water-gas mixture.

[0011] Preferably, an electromagnetic air valve and a first one-way valve are provided on each air path, and a pressure regulating valve is also provided on the first air path and the second air path; a normally closed valve and a second one-way valve are provided on each water path.

[0012] Preferably, the second pipeline is also connected to a second three-way joint, which is respectively connected to a pulping bucket A and a pulping bucket B. A second electromagnetic valve is connected between the pulping bucket A and the second three-way joint, and a third electromagnetic valve is connected between the pulping bucket B and the second three-way joint.

[0013] The beneficial effects of adopting the above technical solutions are as follows: 1. This equipment uses two pulping buckets to circulate pulping, and is provided with four pneumatic butterfly valves and a ball valve, enabling the two pulping buckets to alternately supply mud to the nozzle, realizing continuous spraying operation, and greatly improving the spraying operation efficiency. At the same time, the two pulping buckets pulp intermittently, fully stirring the mud, ensuring the mud quality, and thus ensuring the spraying quality.

[0014] 2. This equipment can adjust the spraying volume by adjusting the rotation speed of the screw pump, adapt to the diameter, height and winding wire pitch of the pipeline to be sprayed, and make it applicable to continuous spraying operations of different pipelines, with a wide range of applications.

[0015] 3. This equipment is provided with a water-air mixing system, and two cleaning ports are provided on the screw pump, and two cleaning ports are provided on the ball valve. The output water-air mixture can automatically carry out water-air flushing on the screw pump and the pipeline between the pulping bucket and the screw pump through the four cleaning ports, and at the same time can automatically carry out water cleaning on the pulping bucket, greatly enhancing the convenience of equipment maintenance, greatly reducing the labor intensity of workers. At the same time, the pressurized water-air mixture has a stronger scouring ability, and the cleaning is cleaner and more thorough. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of this equipment; Figure 2 is the connection schematic diagram of the pneumatic butterfly valve and the ball valve; Figure 3 is the pipeline connection schematic diagram of the water-air mixing system; In the figure: 1. Pulping barrel A; 2. Pulping barrel B; 3. Screw pump, 301. Pulp outlet, 302. First cleaning port, 303. Second cleaning port, 304. Pulp inlet; 4. Frame; 5. First pneumatic butterfly valve; 6. Second pneumatic butterfly valve; 7. Third pneumatic butterfly valve; 8. Fourth pneumatic butterfly valve; 9. Ball valve, 901. Third cleaning port, 902. Fourth cleaning port; 10. First cylinder; 11. Second cylinder; 12. Third cylinder; 13. Fourth cylinder; 14. Fifth cylinder; 15. Nozzle; 16. First solenoid valve; 17. Air source; 18. First pipeline; 19. First check valve; 20. Pressure regulating valve; 21. First three-way joint; 22. Second check valve; 23. Normally closed valve; 24. Second solenoid valve; 25. Third solenoid valve; 26. Second three-way joint; 27. Second pipeline; 28. Towerless water supply equipment; 29. Water source; 30. Double-electric double-control three-position five-way valve; 31. Electromagnetic air valve. Detailed implementation mode

[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0018] As Figure 1 shown, the spraying machine includes a pulping barrel A 1, a pulping barrel B 2, a screw pump 3, a nozzle 15, and a frame 4. The pulping barrel and the screw pump 3 are both installed on the frame 4. The pulp inlet of the nozzle 15 (not shown in the drawing) is connected to the pulp outlet 301 of the screw pump 3 through a pipeline.

[0019] As Figure 1-2 shown, the pulp outlet of the pulping barrel A 1 is connected to the inlet of the second pneumatic butterfly valve 6 through a pipeline, the outlet of the second pneumatic butterfly valve 6 is connected to the inlet of the first pneumatic butterfly valve 5 through a pipeline, and the outlet of the first pneumatic butterfly valve 5 is connected to the waste pulp tank. The pulp outlet of the pulping barrel B 2 is connected to the inlet of the fourth pneumatic butterfly valve 8 through a pipeline, the outlet of the fourth pneumatic butterfly valve 8 is connected to the inlet of the third pneumatic butterfly valve 7 through a pipeline, and the outlet of the third pneumatic butterfly valve 7 is connected to the waste pulp tank. The first inlet of the ball valve 9 is connected to the pipeline between the first pneumatic butterfly valve 5 and the second pneumatic butterfly valve 6, and the second inlet of the ball valve 9 is connected to the pipeline between the third pneumatic butterfly valve 7 and the fourth pneumatic butterfly valve 8. The outlet of the ball valve 9 is connected to the pulp inlet 304 of the screw pump 3 through a pipeline. The first pneumatic butterfly valve 5 is connected to the third cylinder 12, the second pneumatic butterfly valve 6 is connected to the second cylinder 11, the third pneumatic butterfly valve 7 is connected to the fifth cylinder 14, the fourth pneumatic butterfly valve 8 is connected to the fourth cylinder 13, and the ball valve 9 is connected to the first cylinder 10. The five cylinders are controlled by the double-electric double-control three-position five-way valve 30.

[0020] AsFigure 3 As shown in the figure, the water-gas mixing system includes a gas source 17, a water source 29, a first pipeline 18, a second pipeline 27, four gas paths, and four water paths. The first pipeline 18 is connected to the gas source 17, and the four gas paths are connected in parallel to the first pipeline 18. The first gas path and the second gas path are the same, and both are provided with an electromagnetic gas valve 31, a first check valve 19, and a pressure regulating valve 20. The third gas path and the fourth gas path are the same, and both are only provided with an electromagnetic gas valve 31 and a first check valve 19. In actual use, three electromagnetic gas valves 31 are added to the first pipeline 18 as spares. When the electromagnetic gas valve 31 in a certain gas path is damaged, the gas path can be quickly connected to the spare electromagnetic gas valve 31, greatly reducing the equipment stop time and preventing waste caused by the solidification of the slurry in the pulping barrel. The first pipeline 18 is also connected to a double-electric double-control three-position five-way valve 30, and the double-electric double-control three-position five-way valve 30 controls five cylinders. The gas source 17 is also connected to a first solenoid valve 16, and the first solenoid valve 16 is connected to the air inlet of the nozzle 15.

[0021] The second pipeline 27 is connected to a towerless water supply device 28, and the towerless water supply device is connected to the water source 29. The four water paths are connected in parallel to the second pipeline 27, and each water path is provided with a second check valve 22 and a normally closed valve 23. The four water paths are connected to the four gas paths through four first tees 21. It should be noted here that the water path and the gas path are respectively connected to two vertical inlets of the first tee 21. The outlets of the first tees connected to the first gas path and the second gas path are respectively connected to the first cleaning port 302 and the second cleaning port 303 of the screw pump 3. The outlets of the tees of the third gas path and the fourth gas path are respectively connected to the third cleaning port 901 and the fourth cleaning port 902 of the ball valve 9.

[0022] The second pipeline 27 is connected to the A pulping barrel 1 and the B pulping barrel 2 through a second tee 26. A second solenoid valve 25 is provided on the pipeline between the second tee 26 and the A pulping barrel 1, and a third solenoid valve 25 is provided on the pipeline between the second tee 26 and the B pulping barrel 2.

[0023] During the shotcreting operation, the pulp making barrel A 1 starts making pulp. After the pulp making is completed, the second pneumatic butterfly valve 6 opens, the first pneumatic butterfly valve 5 closes, the side of the pulp making barrel A 1 of the ball valve 9 opens, and the side of the pulp making barrel B 2 closes. The slurry passes through the second pneumatic butterfly valve 6 and the ball valve 9 in sequence and then enters the screw pump 3 from the slurry inlet 304. The screw pump 3 rotates to send the slurry out from the slurry outlet 301, and the slurry enters the nozzle 15 from the slurry inlet of the nozzle 15 through the pipeline. At the same time, the first solenoid valve 16 opens, and the gas enters the nozzle 15 from the gas inlet of the nozzle 15 through the pipeline, and the slurry is sprayed on the pipeline to complete the shotcreting operation. According to the actual situation, when there is still a part of the slurry left in the pulp making barrel A 1 (the remaining slurry can be set as a fixed value, generally set according to the construction situation), the pulp making barrel B 2 starts to stir and make pulp. After the pulp making in the pulp making barrel B 2 is completed, the slurry in the pulp making barrel A 1 has not been used up, and the pulp making barrel B 2 continues to stir to prevent the slurry from solidifying. When the amount of slurry in the pulp making barrel A 1 reaches the value for barrel switching, the side of the pulp making barrel A 1 of the ball valve 9 closes, and the side of the pulp making barrel B 2 opens. The fourth pneumatic butterfly valve 8 opens, the third pneumatic butterfly valve 7 closes, and the slurry in the pulp making barrel B 2 passes through the fourth pneumatic butterfly valve 8 and the ball valve 9 in sequence and then enters the screw pump 3 from the slurry inlet 304. The screw pump 3 keeps rotating continuously to send the slurry into the nozzle 15, and the nozzle 15 realizes continuous shotcreting. Repeating like this, the pulp making barrel A 1 and the pulp making barrel B 2 cycle to make pulp and alternately supply slurry to the nozzle 15 until the shotcreting operation is completed. After the shotcreting operation is completed, if there is still excess slurry in the pulp making barrel B 2, the third pneumatic butterfly valve 7 is opened to discharge the remaining slurry and start cleaning.

[0024] When cleaning the pulp buckets, open the third solenoid valve 25 and the second solenoid valve 24 simultaneously to let water into the two pulp buckets, and start the two pulping buckets. At this time, the second pneumatic butterfly valve 6 and the fourth pneumatic butterfly valve 8 are closed. After the pulp buckets are cleaned, open the first pneumatic butterfly valve 5, the second pneumatic butterfly valve 6, the third pneumatic butterfly valve 7, and the fourth pneumatic butterfly valve 8, and close the ball valve 9. The cleaning wastewater is discharged from the first pneumatic butterfly valve 5 and the third pneumatic butterfly valve 7. Then close the first pneumatic butterfly valve 5, the second pneumatic butterfly valve 6, the third pneumatic butterfly valve 7, and the fourth pneumatic butterfly valve 8, and open both sides of the ball valve 9. Then open the four electromagnetic air valves 31, the four first check valves 19, the four second check valves 22, and the four normally closed valves 23, and adjust the two pressure regulating valves 20 so that the four air paths and the four water paths are mixed at the first three-way joint 21 to form four air-water mixtures. The first and second air-water mixtures enter the screw pump 3 from the first cleaning port 302 and the second cleaning port 303 respectively to conduct air-water flushing on the screw pump 3. At this time, the screw pump 3 is in the starting state. The two pressure regulating valves 20 can adjust the gas pressure entering the screw pump 3, and generally do not need to be adjusted after being set. The third and fourth air-water mixtures enter the third cleaning port and the fourth cleaning port on both sides of the ball valve 9 respectively to flush the pipelines between the four butterfly valves, the ball valve 9, and the nozzle 15. The flushed air-water mixture waste liquid is ejected from the nozzle 15, and at the same time, the nozzle 15 is flushed. Finally, open the first pneumatic butterfly valve 5 and the third pneumatic butterfly valve 7 to discharge the remaining cleaning wastewater. The cleaning work is completed, and each valve is closed.

[0025] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A double barrel circulation pulping and cleaning spraying machine, comprising a pulping barrel, a screw pump (3), a plurality of pipelines, a nozzle (15), and a frame (4), wherein the pulping barrel and the screw pump (3) are both mounted on the frame (4), characterized in that: The pulping barrel comprises a pulping barrel A (1) and a pulping barrel B (2), the pulping outlets of the two pulping barrels are connected to the pulping inlet (304) of the screw pump (3), the pulping outlet (301) of the screw pump (3) is connected to the pulping inlet of the nozzle (15) via a spraying pipe, and the air inlet of the nozzle (15) is connected to the air source (17); after the pulping of the pulping barrel A (1) is completed, the screw pump (3) transports the slurry to the nozzle (15), and the slurry at the nozzle (15) is discharged. The liquid is mixed with gas and sprayed onto the surface of the slurry receiving body; during the spraying process, when the amount of slurry in the A slurry making barrel (1) is lower than the set amount of slurry, the B slurry making barrel (2) starts slurrying, and continues to stir after the slurrying is completed; when the amount of slurry in the A slurry making barrel (1) is lower than the set amount of slurry, the A slurry making barrel (1) stops supplying slurry, and the B slurry making barrel (2) starts supplying slurry, and the A slurry making barrel (1) and the B slurry making barrel (2) circulate the slurry supply, and the nozzle (15) continues to spray without interruption.

2. A double-barrel circulating pulping and slurry spraying machine according to claim 1, characterized in that: The pulp outlet of the A pulping barrel (1) is connected to the inlet of the second pneumatic butterfly valve (6) through a pipeline, the outlet of the second pneumatic butterfly valve (6) is connected to the inlet of the first pneumatic butterfly valve (5) through a pipeline, and the outlet of the first pneumatic butterfly valve (5) is connected to the waste pulp pool; the pulp outlet of the B pulping barrel (2) is connected to the inlet of the fourth pneumatic butterfly valve (8) through a pipeline, the outlet of the fourth pneumatic butterfly valve (8) is connected to the inlet of the third pneumatic butterfly valve (7) through a pipeline, and the outlet of the third pneumatic butterfly valve (7) is connected to the waste pulp pool; the first inlet of the ball valve (9) is connected to the pipeline between the first pneumatic butterfly valve (5) and the second pneumatic butterfly valve (6), the second inlet of the ball valve (9) is connected to the pipeline between the third pneumatic butterfly valve (7) and the fourth pneumatic butterfly valve (8), and the outlet of the ball valve (9) is connected to the pulp inlet (304) of the screw pump (3) through a pipeline; the four pneumatic butterfly valves and the ball valve (9) are each connected to a cylinder.

3. A double barrel circulating pulping and slurry spraying machine according to claim 2, characterized in that: The screw pump (3) is arranged vertically, with a second cleaning port (303) provided at the top of the screw pump (3) and a first cleaning port (301) provided at the bottom; a third cleaning port (901) is provided at the first inlet of the ball valve (9), and a fourth cleaning port (902) is provided at the second inlet of the ball valve (9).

4. A double-barrel circulating pulping and slurry spraying machine according to claim 3, characterized in that: The five cylinders are all connected to a double-electric double-controlled three-position five-way valve (30), and the double-electric double-controlled three-position five-way valve (30) is supplied with gas by a gas source (17).

5. A double barrel circulating pulping and slurry spraying machine according to claim 1, characterized in that: The clean slurry spraying machine also includes a water-gas mixing system. The water-gas mixture output by the water-gas mixing system can clean the screw pump (3), the pipeline between the two slurry barrels and the screw pump (3), the slurry pipe between the screw pump (3) and the nozzle (15), and the nozzle (15). The water-gas mixing system can also clean the two slurry barrels with water.

6. A double-barrel circulating pulping and slurry spraying machine according to claim 5, characterized in that: The water-gas mixing system comprises an air source (17), a water source (29), a first pipeline (18), a second pipeline (27), a plurality of air paths, and a plurality of water paths. The first pipeline (18) is connected to the air source (17), the plurality of air paths are connected in parallel to the first pipeline (18), the second pipeline (27) is connected to the water source (29), the plurality of water paths are connected in parallel to the second pipeline (27), each air path is connected to a water path via a first tee (21), and the third port of the first tee (21) outputs a water-gas mixture.

7. A double barrel circulating pulping and slurry spraying machine according to claim 6, characterized in that: Each gas circuit is provided with an electromagnetic valve (31) and a first non-return valve (19), and the first gas circuit and the second gas circuit are also provided with a pressure regulating valve (20); each water circuit is provided with a normally closed valve (23) and a second non-return valve (22).

8. A double barrel circulating pulping and slurry spraying machine according to claim 6, characterized in that: The second pipeline (27) is also connected to a second tee (26), and the second tee (26) is respectively connected to the pulping barrel A (1) and the pulping barrel B (2), a second solenoid valve (24) is connected between the pulping barrel A (1) and the second tee (26), and a third solenoid valve (25) is connected between the pulping barrel B (2) and the second tee (26).

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