Slurry circulating system and control method

Abstract

The invention relates to a slurry circulation system and a control method, the slurry circulation system comprises a slurry supply tank, a sedimentation tank and a main line pipe, a closed-loop circulation system is arranged among the slurry supply tank, the sedimentation tank and the main line pipe, a first slurry pump is installed on the slurry supply tank, and the inlet end of the first slurry pump is located in the slurry supply tank; the outlet end of the first slurry pump is communicated with the inlet end of the main line pipe, and the outlet end of the main line pipe is communicated with the sedimentation tank; the pipe wall of the main pipe is communicated with a plurality of branch pipes, first three-way electromagnetic valves are communicated between the two ends of the main pipe and one ends of the branch pipes, the other ends of the branch pipes are communicated with slurry inlet pipes, the slurry inlet pipes are located at pile casing openings of pile foundations, the pile casing openings are communicated with a slurry overflow pool, and second three-way electromagnetic valves are communicated between the slurry inlet pipes and the branch pipes. The second three-way electromagnetic valve is further communicated with a second slurry pump which is located in the slurry overflow pool. The system has the advantages that the pipeline layout is reasonable, the construction efficiency is high, and the two purposes of slurry supply and recycling can be achieved at the same time.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building construction, and particularly relates to a mud circulating system and a control method. BACKGROUND

[0002] In the process of pile foundation construction, mud protection wall needs to be used, so fresh mud needs to be continuously injected in the process of hole forming. However, if the mud in the hole is not timely and synchronously pumped out during the pouring process due to the replacement of concrete, the mud will overflow from the hole, resulting in mud everywhere in the whole site and causing waste of mud. Therefore, in the construction process, a mud pumping system is installed in each pile hole, and each is independently connected to a mud pool to realize mud pumping of the pile hole. This will cause a large number of pipelines to appear on the site, which will be very messy in the construction site, resulting in very messy inlet pipelines in the mud pool and greatly affecting the construction efficiency. SUMMARY

[0003] The present application aims to overcome the deficiencies in the prior art and provide a mud circulating system and a control method with reasonable pipeline layout and high construction efficiency, which can simultaneously achieve the purposes of mud supply and recycling.

[0004] The purpose of the present application is achieved by the following technical scheme. The mud circulating system comprises a mud supply pool, a sedimentation pool and a main pipeline. A closed loop circulating system is arranged between the mud supply pool, the sedimentation pool and the main pipeline. A first mud pump is installed on the mud supply pool. The inlet end of the first mud pump is located in the mud supply pool. The outlet end of the first mud pump is connected to the inlet end of the main pipeline. The outlet end of the main pipeline is connected to the sedimentation pool. The wall of the main pipeline is connected to a plurality of branch pipelines. A first three-way electromagnetic valve is connected between the two ends of the main pipeline and one end of the branch pipeline. The other end of the branch pipeline is connected to a mud inlet pipeline. The mud inlet pipeline is located at the mouth of the pile foundation casing. The mouth of the casing is connected to a mud overflow pool. A second three-way electromagnetic valve is connected between the mud inlet pipeline and the branch pipeline. The second three-way electromagnetic valve is also connected to a second mud pump. The second mud pump is located in the mud overflow pool.

[0005] The present application has the following advantages. Compared with the prior art, by arranging a closed loop circulating system between the mud supply pool, the sedimentation pool and the main pipeline and arranging branch pipelines each having a three-way electromagnetic valve, the mud system can greatly improve the construction efficiency after being arranged, reduce manual configuration, ensure the timeliness of mud supply and the quality of mud, prevent quality accidents, achieve the purpose of reducing cost and increasing efficiency, and simultaneously achieve the purposes of mud supply and recycling. The mud pipeline is arranged in a closed loop. The mud pump of the mud supply pool continuously pumps mud back to the sedimentation pool, so that the mud in the pipeline continuously circulates and the sediment in the pipeline is reduced, thereby reducing the phenomenon of pipe blockage.

[0006] As preferred, a liquid level monitoring device for monitoring the mud level in the overflow tank is installed on the overflow tank, and the liquid level monitoring device is electrically connected with the second mud pump; in this way, the mud level in the overflow tank can be observed at any time, and the mud in the overflow tank can be discharged to the outside by the second mud pump.

[0007] As preferred, the liquid level monitoring device comprises a liquid level cylinder, a float rod, a float ball, a stop switch and a start switch, the liquid level cylinder is provided with a through hole on both upper and lower surfaces, the float rod is inserted into the through hole, the float ball is fixed at the lower end of the float rod and is in contact with the mud level in the overflow tank, the stop switch is installed on the lower end surface in the liquid level cylinder, the start switch is installed on the upper end surface in the liquid level cylinder, a trigger plate is fixed on the rod body of the float rod, the trigger plate is located between the start switch and the stop switch, the trigger plate is in contact with the start switch or the stop switch with the up-and-down floating of the float ball, and the start switch and the stop switch are electrically connected with the second mud pump; through the above structure, the up-and-down floating of the float rod with the float ball on the mud level controls the start switch or the stop switch, so as to realize the extraction of the mud in the overflow tank by the second mud pump, and the mud in the overflow tank can be kept at a reasonable liquid level at all times.

[0008] As preferred, a hook is provided on the outer wall of the liquid level cylinder, the liquid level monitoring device is hung on the corner of the overflow tank by the hook, and is away from the guard cylinder port; through the above structure, the liquid level monitoring device is more convenient to disassemble and assemble, and is away from the guard cylinder port, so that the liquid level monitoring device is not damaged when the mud flows into the overflow tank from the guard cylinder port.

[0009] As preferred, a filter valve is installed on the branch pipe, and the filter valve is located between the first three-way electromagnetic valve and the second three-way electromagnetic valve; through the filter valve, the filter work is performed once when the mud is supplied and returned, so as to prevent the main pipe from being blocked, when the main pipe is blocked, the worker can continue to use the main pipe after closing the filter valve and disassembling and cleaning the filter screen, and the mud reuse rate is improved.

[0010] As preferred, an electromagnetic booster pump is installed on the main pipe, and the electromagnetic booster pump is located at the center position of the first three-way electromagnetic valve; through the booster pump, the overall working range of the device is expanded, the circulation efficiency is higher, a plurality of hole positions can be covered at the same time, the construction dust can be reduced, and the green construction target is achieved.

[0011] As preferred, an electromagnetic flowmeter for detecting the mud flow in real time is installed at the outlet of the mud supply tank, the inlet of the sedimentation tank and the guard cylinder port; the real-time mud flow can be detected, and whether the pipe is blocked can be judged according to the flow size.

[0012] A control method of the mud circulating system, the control method comprising the following steps: S1, in each pile foundation construction process, the first mud pump is opened, the mud in the slurry tank is transported to the main pipeline through the first mud pump, the main pipeline synchronously transports the mud to each branch pipeline through the first three-way electromagnetic valve, the branch pipeline transports the mud to the slurry inlet pipe through the second three-way electromagnetic valve, and the mud is discharged to the casing opening from the slurry inlet pipe, and meanwhile, the electromagnetic booster pump is started according to the requirement of the site, and the mud is transported in the C direction by the booster; S2, when the mud is fully discharged from the casing opening to the overflow tank, at this time, the mud in the overflow tank floats the float ball upwards, the float rod is driven by the float ball, and the trigger plate is floated and abuts against the starting switch, at this time, the second mud pump in the overflow tank starts to work, and drives the second three-way electromagnetic valve, at this time, the first three-way electromagnetic valve stops the A direction slurry inlet, allows the B direction slurry outlet, the second three-way electromagnetic valve stops the a direction slurry inlet, and allows the b direction slurry outlet; S3, when the mud in the casing opening is insufficient, the steps of S1 to S2 are started again.

[0013] The beneficial effects of the present application are that: through the above control method, in the simultaneous construction process of each pile foundation, the mud can be supplied or discharged through the control method of the mud circulating system, that is, the two purposes of mud supply and recycling can be simultaneously met.

[0014] Preferably, the first mud pump and the second mud pump are both electromagnetic mud pumps, and are connected to an intelligent operation platform system, the first three-way electromagnetic valve, the second three-way electromagnetic valve and the electromagnetic flowmeter are also connected to the intelligent operation platform system, can be individually controlled according to different conditions, and simultaneously display the working states of each component, so that the management personnel can remotely monitor the construction condition; the electromagnetic flowmeter detects the real-time mud flow, is connected to the intelligent control platform, can judge whether the pipe blockage occurs according to the flow size, simultaneously, the mud consumption for pile forming can be calculated according to the flow size, and the concrete consumption for pouring can be calculated; the whole mud circulating system is controlled through the intelligent control system, so that the operation is more convenient, and the precision is higher. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a schematic diagram of the principle structure of the mud circulating system of the present application.

[0016] Fig. 2 is a schematic diagram of the liquid level monitoring device structure of the present application.

[0017] Fig. 3 is a schematic diagram of the structure between the second three-way electromagnetic valve and each pipeline of the present application.

[0018] The labels in the attached diagram are as follows: 1. Slurry supply tank; 2. Sedimentation tank; 3. Main pipeline; 4. First mud pump; 5. Branch pipeline; 6. First three-way solenoid valve; 7. Slurry inlet pipe; 8. Casing inlet; 9. Overflow tank; 10. Second three-way solenoid valve; 11. Second mud pump; 12. Liquid level monitoring device; 13. Filter valve; 14. Electromagnetic booster pump; 15. Electromagnetic flow meter; 16. Slurry outlet pipe; 12-1. Liquid level cylinder; 12-2. Float; 12-3. Float ball; 12-4. Stop switch; 12-5. Start switch; 12-6. Trigger plate; 12-7. Hook. Detailed Implementation

[0019] The invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figs. 1 to 3 As shown, the present invention includes a grout supply tank 1, a sedimentation tank 2, and a main pipeline 3. A closed-loop circulation system is set between the grout supply tank 1, the sedimentation tank 2, and the main pipeline 3. A first mud pump 4 is installed on the grout supply tank 1. The inlet end of the first mud pump 4 is located inside the grout supply tank 1, and the outlet end of the first mud pump 4 is connected to the inlet end of the main pipeline 3. The outlet end of the main pipeline 3 is connected to the sedimentation tank 2. Several branch pipes 5 are connected to the pipe wall of the main pipeline 3. A first three-way solenoid valve 6 is connected between the two ends of the main pipeline 3 and one end of the branch pipe 5. The other end of the branch pipe 5 is connected to a grout inlet pipe 7. The grout inlet pipe 7 is located at the casing opening 8 of the pile foundation. The casing opening 8 is connected to the overflow tank 9. A second three-way solenoid valve 10 is connected between the grout inlet pipe 7 and the branch pipe 5. The second three-way solenoid valve 10 is also connected to a second mud pump 11, which is located inside the overflow tank 9.

[0020] Main pipeline 3 uses galvanized iron pipe, and the joint type adopts clamp type instead of traditional flange connection or welding connection, which can be reused and is easy to disassemble.

[0021] The slurry inlet pipe 7 is fixed to the side wall of the casing opening using a plate-type slurry replenishment device, which optimizes the installation and operation of the circulation system. It is easy to use by simply plugging and unplugging, and is highly efficient and convenient.

[0022] A liquid level monitoring device 12 for monitoring the slurry level in the overflow tank 9 is installed on the overflow tank 9. The liquid level monitoring device 12 is electrically connected to the second slurry pump 11 through the slurry outlet pipe 16.

[0023] The liquid level monitoring device 12 comprises a liquid level cylinder 12-1, a float rod 12-2, a float ball 12-3, a stop switch 12-4 and a start switch 12-5, the upper and lower surfaces of the liquid level cylinder 12-1 are provided with penetrating holes, the float rod 12-2 penetrates the penetrating holes, the float ball 12-3 is fixed at the lower end of the float rod 12-2 and is in contact with the mud liquid level in the overflow tank 9, the stop switch 12-4 is installed on the lower end surface in the liquid level cylinder 12-1, the start switch 12-5 is installed on the upper end surface in the liquid level cylinder 12-1, and the rod body of the float rod 12-2 is fixed with a trigger plate 12-6, the trigger plate 12-6 is located between the start switch 12-5 and the stop switch 12-4, the trigger plate 12-6 is in contact with the start switch 12-5 or the stop switch 12-4 with the up-and-down floating of the float ball 12-3, and the start switch 12-5 and the stop switch 12-4 are electrically connected with the second mud pump 11 respectively.

[0024] A hook 12-7 is arranged on the outer wall of the liquid level cylinder 12-1, the liquid level monitoring device 12 is hung in the corner of the overflow tank 9 through the hook 12-7, and is away from the casing mouth 8.

[0025] A filter valve 13 is installed on the branch pipe 5, and the filter valve 13 is located between the first three-way electromagnetic valve 6 and the second three-way electromagnetic valve 10.

[0026] An electromagnetic force pump 14 is installed on the main pipe 3, and the electromagnetic force pump 14 is located at the center position of the first three-way electromagnetic valves 6.

[0027] An electromagnetic flowmeter 15 for detecting the mud flow in real time is installed at the outlet of the mud supply tank 1, the inlet of the sedimentation tank 2 and the casing mouth 8.

[0028] A control method of a mud circulating system, the control method comprises the following steps: S1, in the process of each pile foundation construction, the first mud pump 4 is started, the mud in the mud supply tank 1 is delivered to the main pipe 3 through the first mud pump 4, the main pipe 3 synchronously delivers the mud to each branch pipe 5 through each first three-way electromagnetic valve 6, the branch pipe 5 delivers the mud to the mud inlet pipe 7 through the second three-way electromagnetic valve 10, and the mud is discharged from the mud inlet pipe 7 to the casing mouth 8, at the same time, the electromagnetic force pump 14 is started according to the requirement of the site, and the mud is delivered along the C direction by force; S2, when the mud is full discharged from the casing mouth 8 to the overflow tank 9, at this time, the mud in the overflow tank 9 will float the float ball 12-3 upward, the float ball 12-3 drives the float rod 12-2 and makes the trigger plate 12-6 float upward and abut against the start switch 12-5, at this time, the second mud pump 11 in the overflow tank 9 starts to work and drives the second three-way electromagnetic valve 10, at this time, the first three-way electromagnetic valve 6 stops the A direction mud inlet and allows the B direction mud outlet, the second three-way electromagnetic valve 10 stops the a direction mud inlet and allows the b direction mud outlet; S3, when the mud in the mouth of the casing 8 is insufficient, at this time, the S1 to S2 steps are started again.

[0029] The first mud pump 4 and the second mud pump 11 are both electromagnetic mud pumps, and are connected to the intelligent operation platform system. The first three-way electromagnetic valve 6, the second three-way electromagnetic valve 10 and the electromagnetic flow meter 15 are also connected to the intelligent operation platform system. According to different situations, each component can be controlled individually, and the working state of each component can be displayed. The management personnel can remotely monitor the construction situation. The electromagnetic flow meter 15 detects the real-time mud flow, and is connected to the intelligent control platform. According to the flow size, it can be judged whether the pipe blockage occurs. At the same time, according to the flow size, the amount of mud required for pile forming can be calculated, and the amount of concrete required for pouring can be calculated. The specific calculation process is as follows: Assuming that the volume of the pile after the hole is formed is v ① The real-time flow rate monitored by the flow meter is Q. If the value of Q is constant, the grouting amount is the integral of the flow rate with respect to time: Among them: t0: is the time when the water injection starts T: is the current time V: is the total grouting amount from t0 to t ② If the value of Q is discrete, that is, in actual situation, the flow meter transmits real-time flow data to the platform every certain time interval and the value of Q is not constant, then the numerical integral can be used to approximate calculation: Among them: : the average flow rate of the i-th time interval : the time interval of the i-th time interval (the unit must be consistent) Considering that there is a certain amount of loss in the actual use of mud, and there is a certain degree of reaming in the hole forming process of the pile, a reduction factor needs to be multiplied in the final calculation: Among them: V0: actual grouting amount K: reaming coefficient, the average value of each stratum is 1.3 V: total grouting amount The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A mud circulation system, comprising a mud supply tank (1), a sedimentation tank (2), and a main pipeline (3), characterized in that: A closed-loop circulation system is provided between the slurry supply tank (1), the sedimentation tank (2), and the main pipeline (3). A first mud pump (4) is installed on the slurry supply tank (1). The inlet end of the first mud pump (4) is located inside the slurry supply tank (1), and the outlet end of the first mud pump (4) is connected to the inlet end of the main pipeline (3). The outlet end of the main pipeline (3) is connected to the sedimentation tank (2). Several branch pipes (5) are connected to the pipe wall of the main pipeline (3). A first three-way solenoid valve (6) is connected between one end of the branch pipe (5) and the other end of the branch pipe (5) is connected to a grout inlet pipe (7). The grout inlet pipe (7) is located at the casing opening (8) of the pile foundation. The casing opening (8) is connected to the overflow pool (9). A second three-way solenoid valve (10) is connected between the grout inlet pipe (7) and the branch pipe (5). The second three-way solenoid valve (10) is also connected to a second mud pump (11). The second mud pump (11) is located inside the overflow pool (9).

2. The mud circulation system according to claim 1, characterized in that: The overflow tank (9) is equipped with a liquid level monitoring device (12) for monitoring the mud level in the overflow tank (9), and the liquid level monitoring device (12) is electrically connected to the second mud pump (11).

3. The mud circulation system according to claim 2, characterized in that: The liquid level monitoring device (12) includes a liquid level cylinder (12-1), a float (12-2), a float ball (12-3), a stop switch (12-4), and a start switch (12-5). The liquid level cylinder (12-1) has insertion holes on both its upper and lower surfaces. The float (12-2) is inserted through these holes. The float ball (12-3) is fixed to the lower end of the float (12-2) and contacts the slurry surface in the overflow tank (9). The stop switch (12-4) is installed on the lower end face of the liquid level cylinder (12-1). The start switch (12-5)... 2-5) Installed on the upper end face inside the liquid level cylinder (12-1), and a trigger plate (12-6) is fixed on the rod body of the float (12-2). The trigger plate (12-6) is located between the start switch (12-5) and the stop switch (12-4). The trigger plate (12-6) floats up and down with the float (12-3) and contacts the start switch (12-5) or the stop switch (12-4). The start switch (12-5) and the stop switch (12-4) are electrically connected to the second mud pump (11) respectively.

4. The mud circulation system according to claim 2, characterized in that: The outer wall of the liquid level cylinder (12-1) is provided with a hook (12-7), through which the liquid level monitoring device (12) is hung at the corner of the overflow pool (9) and away from the cylinder opening (8).

5. The mud circulation system according to claim 1, characterized in that: A filter valve (13) is installed on the branch pipe (5), and the filter valve (13) is located between the first three-way solenoid valve (6) and the second three-way solenoid valve (10).

6. The mud circulation system according to claim 1, characterized in that: An electromagnetic booster pump (14) is installed on the main pipeline (3), and the electromagnetic booster pump (14) is located at the center of several of the first three-way solenoid valves (6).

7. The mud circulation system according to claim 1, characterized in that: Electromagnetic flowmeters (15) for real-time detection of mud flow are installed at the outlet of the slurry supply tank (1), the inlet of the sedimentation tank (2), and the outlet of the casing (8).

8. A control method for a mud circulation system according to claims 1 to 7, characterized in that: The control method includes the following steps: S1. During the construction of each pile foundation, the first mud pump (4) is turned on. The mud in the slurry tank (1) is transported to the main pipeline (3) through the first mud pump (4). The main pipeline (3) is transported to each branch pipeline (5) through each first three-way solenoid valve (6). The branch pipeline (5) is transported to the slurry inlet pipe (7) through the second three-way solenoid valve (10). The slurry is discharged from the slurry inlet pipe (7) to the casing opening (8). At the same time, the electromagnetic booster pump (14) is started according to the site requirements and the mud is transported along the C direction. S2. When the mud overflows from the casing opening (8) into the overflow tank (9), the mud in the overflow tank (9) will cause the float (12-3) to float up. The float (12-3) will drive the float rod (12-2) and cause the trigger plate (12-6) to float up and contact the start switch (12-5). At this time, the second mud pump (11) in the overflow tank (9) will start working and drive the second three-way solenoid valve (10). At this time, the first three-way solenoid valve (6) will stop the mud inlet in direction A and allow the mud outlet in direction B. The second three-way solenoid valve (10) will stop the mud inlet in direction a and allow the mud outlet in direction b. S3. When there is insufficient mud in the casing opening (8), start again according to steps S1 to S2.

9. The control method for the mud circulation system according to claim 8, characterized in that: The first mud pump (4) and the second mud pump (11) are both electromagnetic mud pumps and are connected to the intelligent operation platform system. The first three-way solenoid valve (6), the second three-way solenoid valve (10) and the electromagnetic flow meter (15) are also connected to the intelligent operation platform system. They can be operated independently according to different situations, and the working status of each component can be displayed at the same time. The management personnel can remotely monitor the construction situation. The electromagnetic flow meter (15) detects the real-time mud flow and is connected to the intelligent control platform. It can determine whether the pipe blockage has occurred based on the flow rate. At the same time, it can calculate the amount of mud required for pile formation based on the flow rate and estimate the amount of concrete required for grouting.

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