A circulating water curing pool for subway shield segments

Abstract

The utility model relates to a circulating water curing pool for subway shield segments, which includes a plurality of water pools connected in sequence end to end through a circulating water pipe, a circulating pump arranged on at least one of the circulating water pipes, a pH detection module arranged on the water pool through a lifting and moving pair, a liquid replenishment pipeline connected to the water pools, a metering pump arranged in the liquid inlet section of the liquid replenishment pipeline, a pair of drivers, and a controller, wherein the signal input end of the controller is electrically connected to the pH detection module, and the signal output end is electrically connected to the circulating pump and the metering pump through the pair of drivers. The utility model provides power for circulating curing liquid and replenishing alkali liquid or water through a circulating pump and a metering pump, respectively, and has the advantages of fast response and high precision, and is supplemented by a pH detection module, a driver, and a controller to improve the control precision of liquid replenishment, and finally realizes the effect of real-time detection of pH of the curing pool, and can replenish liquid evenly and timely to ensure the quality of shield segment curing.

Description

Technical Field

[0001] The utility model relates to the technical field of subway shield segment maintenance, in particular to a subway shield segment circulating water maintenance pool. Background Art

[0002] The shield segment is the main assembly component of the shield construction, the innermost barrier of the subway tunnel, and the permanent lining structure of the shield tunnel. It is responsible for resisting soil pressure, groundwater pressure and some special loads. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel. At present, the production process of the shield segment is to first pour high-strength and impermeable concrete into the segment mold, demold it after initial hardening, and then immerse the formed segment in the curing pool for a certain period of time. The height of each curing pool side wall is slightly higher than the curing liquid level, and the height of the curing liquid level is slightly higher than the top surface of the segment, so that the curing liquid just submerges the vertically placed segment to the top.

[0003] Raw material control, concrete mix ratio, mold structure and manual operation proficiency are the main factors affecting the quality of shield segments. Practice shows that the pH value of the curing fluid in the curing tank has an important influence on it. Among them, 1) As the pH value of the curing fluid increases, the appearance color of the segment changes from grayish white to light black, and the compressive and permeability strengths gradually decrease; 2) When the pH value is between 7 and 10, the color of the segment is normal, and the compressive and permeability strengths change little; 3) When the pH is greater than 10, the color of the segment changes to light black, and the compressive and permeability strengths decrease sharply. Therefore, the reasonable range of the pH value of the curing fluid can be set to 7 to 10, and pH value monitoring during the curing process is crucial. However, the current pH monitoring and adjustment of the shield segment curing tank often uses manual operations, and the volume of the curing tank is large, which often fails to achieve the purpose of uniform and timely replenishment of the fluid (alkaline solution or water), which in turn affects the curing quality of the shield segment. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a subway shield segment circulating water curing pool in view of the above-mentioned deficiencies existing in the prior art, which solves the problem of uneven and timely fluid replenishment caused by the existing manual detection of pH value in the curing pool, and has the advantage of ensuring the quality of shield segment curing.

[0005] The above utility model object of the utility model is achieved through the following technical solutions:

[0006] A circulating water maintenance pool for subway shield segments comprises a plurality of water pools connected in sequence end to end through circulating water pipes, a circulating pump arranged on at least one of the circulating water pipes, a pH detection module arranged on the water pool through a lifting and moving pair, a liquid replenishment pipeline connected to the water pools, a metering pump arranged in a liquid inlet section of the liquid replenishment pipeline, a pair of drivers, and a controller, wherein a signal input end of the controller is electrically connected to the pH detection module, and a signal output end is electrically connected to the circulating pump and the metering pump respectively through the pair of drivers.

[0007] By adopting the above technical solution, during the daily maintenance process, these water pools are connected in sequence end to end through the circulating water pipe to form an overall circulating curing pool. The pH value of the curing liquid in the water pool is detected in real time through the pH detection module, and the detection information is sent to the controller. The controller is used to receive the detection signal, compare the detection signal with the pH threshold, and calculate the pumping time and flow rate of the metering pump when the pH threshold is reached. Then the controller sends the calculation result to the driver, so that the pair of drivers respectively control the actions of the circulating pump and the metering pump. The supplemented alkali solution or water is respectively supplemented to these water pools through the replenishment pipeline, and the circulation and homogenization of the curing liquid in each water pool is promoted by the circulating pump until the metering pump completes the pumping of the corresponding amount of alkali solution or water. In this process, the circulation pump and the metering pump provide power for circulating the curing liquid and replenishing the alkali solution or water, respectively, which has the advantages of fast response and high precision, and is assisted by the pH detection module, the driver, and the controller to improve the replenishment control accuracy, and finally achieves the effect of real-time detection of the pH value of the curing pool, and can replenish the liquid evenly and timely to ensure the maintenance quality of the shield segment.

[0008] The utility model is further configured as follows: four water pools are provided and arranged in a straight line, four circulating water pipes are correspondingly provided, and the two ends of one circulating water pipe are respectively connected to the two outermost water pools, and the circulating pump is provided, and the other circulating water pipes are connected to the two adjacent water pools in sequence.

[0009] By adopting the above technical solution, the circulation of the curing fluid in these water pools can be promoted at a lower energy consumption, so that the curing fluid indicators of each water pool tend to be consistent, which is beneficial to ensuring the maintenance quality of the shield segments.

[0010] The utility model is further configured as follows: a plurality of pH detection modules are provided and are evenly arranged along the circumference of the pool.

[0011] The adoption of the above technical solution is beneficial to improving the accuracy of pH detection.

[0012] The utility model is further configured as follows: the pH detection module is configured as a pH sensor and a temperature sensor, and the pH sensor and the temperature sensor are respectively arranged at the moving ends of the two lifting moving pairs.

[0013] By adopting the above technical solution, for the weakly alkaline curing solution, the increase of the environment and the replenishing temperature will promote the ionization of more OH - , leading to OH - As the concentration increases, the pH value will increase, and vice versa. Therefore, simultaneous detection of the pH value and temperature of the curing solution has a greater impact on adjusting the pH value of the curing solution, which is beneficial to improving the accuracy of pH adjustment.

[0014] The utility model is further configured as follows: the lifting and moving pair includes an adjustment seat arranged on the water pool, an adjustment nut rotatably connected to the adjustment seat, and an adjustment screw threadedly connected to the adjustment nut, and the pH detection module is arranged at the bottom end of the adjustment screw.

[0015] By adopting the above technical solution, the screw drive has the advantages of small starting torque and good self-locking, so that the installation height of the pH detection module can be adjusted according to the pool liquid level.

[0016] The utility model is further configured as follows: the adjusting nut is configured as a hand-tightening nut.

[0017] By adopting the above technical solution, it is convenient for users to grasp and apply force.

[0018] The utility model is further configured as follows: a gripping portion is provided at the top end of the adjusting screw.

[0019] By adopting the above technical solution, it is convenient for users to grasp and apply force.

[0020] The utility model is further configured as follows: a plurality of channel steel brackets are arranged on the outer wall of the water pool, and the pipe bodies of the circulating water pipe and the liquid replenishing pipe are respectively passed through the channel steel brackets and overlapped on the surfaces of the channel steel brackets.

[0021] The adoption of the above technical solution is conducive to improving the installation stability of these circulating water pipes and liquid replenishment pipes on the outer wall of the pool.

[0022] To sum up, the beneficial technical effects of the utility model are as follows: the circulating pump and the metering pump are used to provide power for circulating the curing fluid and replenishing the alkali solution or water respectively, which has the advantages of fast response and high precision, and is supplemented by the pH detection module, the driver, and the controller to improve the control accuracy of the liquid replenishment, and finally realizes the effect of real-time detection of the pH of the curing pool, and can replenish the liquid evenly and timely to ensure the maintenance quality of the shield segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a curing pool of the utility model.

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the curing pool of the utility model.

[0025] Figure 3 It is a schematic diagram of the connection relationship between the water pool, the lifting and moving pair and the pH detection module of the utility model.

[0026] Figure 4 It is a schematic diagram of the connection relationship between the circulating water pipe and the channel steel support of the utility model.

[0027] In the figure, 1. circulating water pipe; 2. water tank; 3. circulating pump; 4. lifting and moving pair; 41. adjusting seat; 42. adjusting nut; 43. adjusting screw; 44. holding part; 5. pH detection module; 51. pH sensor; 52. temperature sensor; 6. fluid replenishment pipeline; 7. metering pump; 8. driver; 9. controller; 10. channel steel bracket. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Reference Figure 1 and Figure 2 , a subway shield segment circulating water curing pool disclosed in the utility model, includes four pools 2 connected end to end through a circulating water pipe 1, a circulating pump 3 arranged on one of the circulating water pipes 1, a pH detection module 5 arranged on the pool 2 through a lifting and moving pair 4, a liquid replenishment pipeline 6 connected to these pools 2, a metering pump 7 arranged in the liquid inlet section of the liquid replenishment pipeline 6, a pair of drivers 8, and a controller 9. Among them, the signal input end of the controller 9 is electrically connected to the pH detection module 5, and the signal output end is electrically connected to the circulating pump 3 and the metering pump 7 through the pair of drivers 8.

[0030] Correspondingly, four circulating water pipes 1 are provided, and the two ends of one of the circulating water pipes 1 are respectively connected to the two outermost water pools 2 and provided with the above-mentioned circulating pump 3, and the other circulating water pipes 1 are sequentially connected to the two adjacent water pools 2. By adopting the above-mentioned structure, the circulation of the curing liquid in these water pools 2 can be promoted at a lower energy consumption, so that the curing liquid indicators of each water pool 2 tend to be consistent, which is conducive to ensuring the curing quality of the shield segment.

[0031] Reference Figure 3, there are four groups of pH detection modules 5, each group of pH detection modules 5 is provided with four, and are evenly arranged along the circumference of the pool 2. In addition, the pH detection module 5 is provided with a pH sensor 51 and a temperature sensor 52, and the pH sensor 51 and the temperature sensor 52 are respectively arranged at the moving ends of the two lifting and moving pairs 4. For the weakly alkaline curing liquid, the increase of the environment and the replenishing temperature will promote the ionization of more OH-, resulting in an increase in the OH- concentration and the pH value, and vice versa. Therefore, the simultaneous detection of the pH value and temperature of the curing liquid has a greater impact on the adjustment of the pH of the curing liquid, which is conducive to improving the accuracy of the pH adjustment.

[0032] The lifting and moving pair 4 includes an adjustment seat 41 arranged on the pool 2, an adjustment nut 42 (hand-tightening nut) rotatably connected to the adjustment seat 41, an adjustment screw 43 threadedly connected to the adjustment nut 42, and a gripping portion 44 arranged at the top of the adjustment screw 43. Among them, the pH detection module 5 is arranged at the bottom end of the adjustment screw 43. The screw drive has the advantages of small starting torque and good self-locking, so that the installation height of the pH detection module 5 can be adjusted according to the liquid level of the pool 2.

[0033] Reference Figure 2 and Figure 4 The outer wall of the pool 2 is provided with a plurality of channel steel brackets 10, and the pipe bodies of the circulating water pipe 1 and the liquid replenishing pipe 6 are respectively passed through the channel steel brackets 10 and overlapped on the surface of the channel steel brackets 10. The channel steel brackets 10 support these circulating water pipes 1 and the liquid replenishing pipes 6, which is conducive to improving the installation stability of these circulating water pipes 1 and the liquid replenishing pipes 6 on the outer wall of the pool 2.

[0034] The implementation principle of this embodiment is: during daily maintenance, these water pools 2 are connected in sequence end to end through the circulating water pipe 1 to form an overall circulating maintenance pool, and the pH value of the maintenance liquid in the water pool 2 is detected in real time through the pH detection module 5, and the detection information is sent to the controller 9, the controller 9 is used to receive the detection signal, compare the detection signal with the pH threshold, and calculate the pumping time and flow rate of the metering pump 7 when the pH threshold is reached, and then the controller 9 sends the calculation result to the driver 8, so that the pair of drivers 8 respectively control the circulation pump 3 and the metering pump 7 to operate, and the supplementary alkali solution or water is supplemented to these water pools 2 respectively through the liquid replenishment pipeline 6, and the circulation pump 3 promotes the circulation and homogenization of the maintenance liquid in each water pool 2 until the metering pump 7 completes the pumping of the corresponding amount of alkali solution or water. In this process, the circulation pump 3 and the metering pump 7 provide power for circulating the curing liquid and replenishing the alkali solution or water respectively, which has the advantages of fast response and high precision, and is assisted by the pH detection module 5, the driver 8, and the controller 9 to improve the control accuracy of the liquid replenishment, and finally achieves the effect of real-time detection of the pH of the curing pool, and can replenish the liquid evenly and timely to ensure the maintenance quality of the shield segment.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A circulating water curing pool for subway shield segments, characterized in that: The invention comprises a plurality of water pools (2) connected end to end via a circulating water pipe (1), a circulating pump (3) arranged on at least one of the circulating water pipes (1), a pH detection module (5) arranged on the water pool (2) via a lifting and moving pair (4), a liquid replenishment pipe (6) connected to the water pools (2), a metering pump (7) arranged in a liquid inlet section of the liquid replenishment pipe (6), a pair of drivers (8), and a controller (9), wherein a signal input end of the controller (9) is electrically connected to the pH detection module (5), and a signal output end is electrically connected to the circulating pump (3) and the metering pump (7) respectively via the pair of drivers (8).

2. A circulating water curing pool for subway shield segments according to claim 1, characterized in that: The water pools (2) are provided in four numbers and arranged in a straight line, and the circulating water pipes (1) are correspondingly provided in four numbers, and the two ends of one of the circulating water pipes (1) are respectively connected to the two outermost water pools (2) and are provided with the circulating pump (3), and the other circulating water pipes (1) are connected to the two adjacent water pools (2) in sequence.

3. A circulating water curing pool for subway shield segments according to claim 1, characterized in that: The pH detection modules (5) are provided in plurality and are evenly arranged along the circumference of the water pool (2).

4. A circulating water curing pool for subway shield segments according to claim 1, characterized in that: The pH detection module (5) is configured as a pH sensor (51) and a temperature sensor (52), and the pH sensor (51) and the temperature sensor (52) are respectively arranged at the moving ends of the two lifting moving pairs (4).

5. A circulating water curing pool for subway shield segments according to claim 1, characterized in that: The lifting and moving pair (4) comprises an adjusting seat (41) arranged on the water pool (2), an adjusting nut (42) rotatably connected to the adjusting seat (41), and an adjusting screw (43) threadedly connected to the adjusting nut (42), and the pH detection module (5) is arranged at the bottom end of the adjusting screw (43).

6. A circulating water curing pool for subway shield segments according to claim 5, characterized in that: The adjusting nut (42) is configured as a hand-tightened nut.

7. A circulating water curing pool for subway shield segments according to claim 5, characterized in that: The top end of the adjusting screw rod (43) is provided with a gripping portion (44).

8. A circulating water curing pool for subway shield segments according to claim 1, characterized in that: The outer wall of the water pool (2) is provided with a plurality of channel steel brackets (10), and the pipe bodies of the circulating water pipe (1) and the liquid replenishing pipe (6) are respectively passed through the channel steel brackets (10) and overlapped on the surface of the channel steel brackets (10).

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