Hydropower station geological defect treatment device and method

Abstract

The invention discloses a hydropower station geological defect treatment device and method, and belongs to the technical field of building construction.According to the scheme, the air supply resistance of a grout return pipe or the humidity of air in a grout pipe is detected during grouting hole air drainage treatment; when it is judged that the air supply resistance is smaller than the first set threshold value or the humidity is smaller than the second set threshold value, the air supply system stops working, and the timing module starts timing; when the count value of the timing module reaches a set value, the air supply system is triggered to start working; after the air supply system starts to work, the detection result is compared with the first set threshold value or the second set threshold value, and when the number of starting times of the air supply system is larger than one, and after the current air supply system starts to work, when the duration time when the detection result is larger than the first set threshold value or the second set threshold value is smaller than a third set threshold value, the air supply system starts to work. According to the scheme, the automatic degree of chemical grouting can be effectively improved, and meanwhile the grouting quality can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a device and method for processing geological defects in a hydropower station. Background Art

[0002] The geological defects in the dam area of ​​a hydropower station include natural or man-made weaknesses or anomalies in the strata, such as faults and fissures. These defects affect the integrity of the rock mass, and may have a significant impact on the strength and stability of the rock mass, posing a threat to the safety of the project. At the same time, the construction process of the hydropower station and in the later stages may also lead to further deterioration of the geological defects. During the construction process, scientific detection, evaluation and treatment of geological defects are important guarantees for the smooth construction of the hydropower station and the quality of the project. During the construction of the hydropower station, the commonly used methods for treating geological defects include rock reinforcement treatment, rock water isolation treatment and rock drainage treatment. Among them, reinforcement treatment can effectively improve the integrity, stability and strength of the foundation. The chemical grouting method of the hydropower station is a reinforcement method that uses a grouting pump to inject chemical grouting material into the cracks of the stratum by pressure grouting.

[0003] In the chemical grouting process, the core samples are first tested to select and proportion the grouting materials and obtain the grouting process parameters. Then, the grouting holes are obtained in the grouting area by drilling. Then, the grouting area is treated. After the grouting requirements are met in the grouting area, the slurry is injected by pressure injection. Finally, the grouting quality is inspected and evaluated after the grouting solidifies. During the treatment of the grouting area, a method of draining the grouting holes with compressed air is included. The purpose of this treatment measure is to avoid the influence of water on the bonding and solidification characteristics of the slurry, thereby ensuring the solidification strength of the slurry and the overall stability of the grouting area after grouting. The specific technical solution is provided in the patent application number CN201310086089.3.

[0004] At present, the methods for evaluating the drainage effect of grouting holes before grouting include visual observation and humidity detection. In order to ensure the smooth progress of hydropower station construction and ensure the construction quality, it is necessary to further optimize the geological defect treatment plan of the hydropower station. Summary of the invention

[0005] In view of the problem of optimizing the solution for handling geological defects in hydropower stations mentioned above, the present invention proposes a device and method for handling geological defects in hydropower stations. This solution can effectively improve the degree of automation of chemical grouting and ensure the quality of grouting.

[0006] The specific technical scheme is: a hydropower station geological defect treatment device, including a grouting pipe and a return grouting pipe for chemical grouting, an air supply system for injecting compressed air into the grouting hole through the return grouting pipe, and a detection device for detecting the air supply resistance of the return grouting pipe or the humidity of the air in the grouting pipe; It also includes a control module and a timing module, wherein the control module is used to: collect the detection results of the detection device, and determine whether the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, and when it is determined that the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, send a stop air supply instruction to the air supply system and the timing module, and the stop air supply instruction is used to trigger the air supply system to stop working and trigger the timing module to start timing; The timing module is also used to: when the count value of the timing module reaches a set value, trigger the control module to send an air supply start instruction to the air supply system, and the air supply start instruction is used to trigger the air supply system to start working; The control module is also used to: after the air supply system starts working, collect the current detection results of the detection device in real time, and compare the detection results with the first set threshold or the second set threshold; when the air supply system is started more than once, and the duration of the detection result greater than the first set threshold or the second set threshold since the air supply system started working is less than the third set threshold, issue a reminder instruction to complete the drainage of the grouting holes, and issue an instruction to stop the air supply.

[0007] In the process of using chemical grouting to treat the geological defects of the hydropower station foundation, the process involved includes grouting hole flushing and grouting hole drainage based on compressed air. Among them, grouting hole flushing is used to remove the residue in the hole and clean the cracks to ensure the grouting quality and improve the grouting effect. Grouting hole drainage is used to avoid the influence of water on the bonding and curing characteristics of the slurry, thereby ensuring the curing strength of the slurry and the overall stability of the grouting area after grouting. Regarding whether the grouting hole drainage is completed, the existing means generally use manual observation and detection methods to identify and judge. The grouting area generally has a large number of grouting holes and a long compressed air drainage time for a single grouting hole. At the same time, there is a possibility that after the water in the grouting hole is discharged, the submerged water in the cracks connected to the grouting hole flows into the grouting hole, and the wall water further gathers in the grouting hole. Based on the above, the design purpose of this scheme is to provide a technical solution that can effectively improve the degree of automation of chemical grouting, and at the same time, through reliable grouting hole drainage, the quality of grouting can be guaranteed.

[0008] During specific application, the grouting pipe is inserted to the bottom of the grouting hole, and when the compressed air pressure provided by the air supply system is injected into the return-grouting pipe through the return-grouting pipe, if there is water in the grouting hole, before the water is blown out, it can be detected through the return-grouting pipe that there is a large air supply resistance, and the air therein has a large humidity through the grouting pipe. Based on this, the control module determines through the collection results whether the water in the grouting hole is discharged by the compressed air at this time; as the compressed air is continuously injected, when the control module determines that the water in the grouting hole is blown out according to the set first set threshold value or the second set threshold value and the collected detection results, it triggers the air supply system to stop working and triggers the timing module to start timing. The air supply system stops working and stops injecting compressed air into the grouting hole. The timing module starts timing to determine the time when the air supply system starts to supply air next time, and during the period when the air supply is stopped, the potential in the cracks is Water and wall water gather at the bottom of the grouting hole. According to the timing result of the timing module, when the count value reaches the set value, the air supply system starts to work, and after the air supply system starts to work, the control module collects the current detection result of the detection device in real time, and continues to compare the detection result with the first set threshold or the second set threshold. When the air supply system is not started for the first time, and since the air supply system starts to work, the duration of the detection result greater than the first set threshold or the second set threshold is less than the third set threshold, it is considered that the water in the current grouting hole is discharged in a faster time. During the period when the air supply system stops working, the amount of water gathered in the grouting hole is small. At this time, there is a small amount of wall water that will gather in the grouting hole and / or a small amount of submergence in the cracks. At this time, the state of the grouting area is suitable for high-quality slurry injection to reliably deal with geological defects.

[0009] In summary, when the command to stop air supply is issued, it means that the current purge has been completed. The next purge will be carried out after waiting for a period of time according to the set value, and during the purge process, it is determined whether the current state meets the grouting requirements according to the duration. If the duration is longer than the third set threshold, when the purge is judged to be less than the first set threshold or the humidity is less than the second set threshold, the air supply of this stage is stopped, and the next stage of air supply purge is triggered according to the set value until the grouting hole drainage is completed by the duration. According to the above settings, this scheme can realize the automation of the grouting hole drainage process and improve the degree of automation of the geological defect processing process. At the same time, the relevant settings can effectively ensure the drainage quality of the grouting holes, which is beneficial to ensuring the grouting quality in the later stage.

[0010] It is easy to understand that in this scheme, it is set to start the air supply system more than once, with the purpose of requiring at least one compressed air purge to solve the water introduced during the flushing of the grouting hole. After completing at least one compressed air purge, in the later purge stage, the duration is judged to determine the amount of water gathered in the grouting hole during the purge stop stage, thereby obtaining the water situation in the grouting hole wall and the cracks connected to the grouting hole. The first set threshold and the second set threshold can be set according to the current geological characteristics and the requirements of the slurry on the environment, and the set value and the third set threshold can be determined based on the geological characteristics of the exploration and combined with experience.

[0011] In a specific embodiment, the air supply system includes an air compressor and an air storage tank. A drain valve is provided at the bottom of the air storage tank, and the slurry return pipe is connected to the air storage tank through an air duct.

[0012] In the above scheme, the design of the air supply system is used to solve the problem of the source of compressed air, and enables the air compressor to work intermittently to improve the utilization rate of the air compressor. Specifically, when the compressed air consumption in the air tank is equal to or lower than the set lower pressure limit, the air compressor works to replenish the pressure of the air tank, and the steam trap is used to discharge the water retained at the bottom of the air tank, so that the air supply system can provide stable and relatively dry compressed air for the return slurry pipe.

[0013] In a specific embodiment, a throttling pipe and a post-valve pressure control valve are provided on the induced air pipe, and the post-valve pressure control valve is located on the induced air pipe between the throttling pipe and the air storage tank; The detection device comprises a pressure sensor for measuring the internal pressure of the induced draft pipe, wherein the pressure sampling point of the pressure sensor is located on the induced draft pipe between the throttling pipe and the return slurry pipe; The control module is used to collect and count the detection results of the pressure sensor, and when the pressure sensor has a stable detection result that is less than a set pressure value, it is determined that the air supply resistance is less than a first set threshold.

[0014] In the above scheme, in view of the fact that the internal pressure of the air storage tank fluctuates during use, the pressure control valve behind the valve is used to control the pressure of the compressed air in the rear end air duct, so that the front end air duct of the throttling pipe has a relatively stable pressure. Under such application, as the water in the grouting hole is continuously discharged, the air flow resistance of the air path between the compressed air inlet of the return pipe and the compressed air outlet of the grouting pipe becomes smaller, and the flow rate at the pressure sampling point of the pressure sensor increases. Therefore, the accurate change of the air supply resistance can be obtained through the detection results of the pressure sensor, thereby improving the accuracy of the detection results of the detection device.

[0015] In a specific embodiment, a throttling pipe and a post-valve pressure control valve are provided on the induced air pipe, and the post-valve pressure control valve is located on the induced air pipe between the throttling pipe and the air storage tank; The detection device comprises a flow meter connected in series to the induced air pipe, and the flow meter is located on the induced air pipe between the throttling pipe and the return slurry pipe; The control module is used to collect and count the detection results of the flow meter, and when the flow meter has a detection result that is stable and greater than a set flow value, it is determined that the air supply resistance is less than a first set threshold.

[0016] As a technical solution based on a flow meter and parallel to the above-mentioned pressure sensor detection method, specifically, in view of the fact that the internal pressure of the air storage tank fluctuates during use, a post-valve pressure control valve is used to control the pressure of the compressed air in the rear end air duct, so that the front end air duct of the throttling pipe has a relatively stable pressure. Under such application, as the water in the grouting hole is continuously discharged, the air flow resistance of the air path between the compressed air inlet of the return pipe and the compressed air outlet of the grouting pipe becomes smaller, and the changing trend of the flow increase can be obtained through the flow meter. Therefore, the accurate change of the air supply resistance can be obtained through the detection results of the flow meter, thereby improving the accuracy of the detection results of the detection device.

[0017] In a specific embodiment, the detection device includes a humidity sensor for measuring the air humidity in the slurry return pipe; The control module is used to collect and count the detection results of the humidity sensor, and when the humidity sensor has a stable detection result that is less than a set humidity value, it is determined that the humidity of the air in the return slurry pipe is less than a second set threshold.

[0018] The above scheme is a technical scheme that uses a humidity sensor to detect the air humidity in the grouting pipe to determine whether there is any unauthorized water in the grouting hole. In specific applications, as the water is continuously discharged under the action of compressed air, the humidity sensor has a process in which the detection result gradually decreases. When the detection result is stable, it means that the compressed air cannot further discharge the water. The technicians in this field can set the humidity value according to the current geological characteristics and the requirements of the geology and grouting materials for the grouting conditions.

[0019] In a specific embodiment, it also includes a grouting pump for providing slurry to the grouting pipe. The grouting pump is a pneumatic grouting pump, and the pneumatic grouting pump is connected to a slurry pump. The outlet of the slurry pump is connected to the slurry inlet of the pneumatic grouting pump, and the inlet of the slurry pump is connected to a slurry tank for providing slurry to the slurry pump.

[0020] The above scheme provides a specific implementation method of a grouting pump, the purpose of which is that the compressed air provided to the pneumatic grouting pump determines the maximum grouting pressure of the slurry. In this application, it can avoid damage to the grouting system due to excessive grouting pressure, safety accidents, and damage to geological structures due to grouting. At the same time, the above scheme provides a technical solution based on a slurry pump and a slurry tank, which can realize the automatic supply of slurry to the pneumatic grouting pump.

[0021] In a specific embodiment, it further includes a three-way valve, the air supply system is connected to the slurry return pipe and the pneumatic grouting pump through the three-way valve, and the three-way valve is equipped with an electric drive mechanism or a pneumatic drive mechanism for controlling the opening state of the three-way valve; The three-way valve is used to switch the conduction state between the grouting pipe and the air supply system and the pneumatic grouting pump, and the electric drive mechanism or the pneumatic drive mechanism is used to drive the three-way valve to operate.

[0022] In the above scheme, the air supply system serves as a common gas source for the drainage of the return grout pipe and the pneumatic grouting pump. After the drainage of the grouting hole is completed, the electric drive mechanism or the pneumatic drive mechanism can be switched to the air supply system and connected to the pneumatic grouting pump. When used in an automated grouting system, under relevant control instructions, the grouting system can automatically switch from the grouting hole drainage stage to the slurry drainage stage (in this stage, slurry is injected through the grouting pipe, and the valve on the return grout pipe is in an open state to achieve further drainage of the grouting hole through the slurry flowing through the grouting pipe and the return grout pipe. After the drainage in this stage is completed, the valve on the return grout pipe is closed to proceed to the next stage of pressure grouting process).

[0023] In a specific embodiment, the pneumatic grouting pump is provided with a flow meter for measuring the slurry flow rate by detecting the piston movement stroke of the pneumatic grouting pump; The air pressure chamber of the pneumatic grouting pump is connected to an air supply system, and the air supply system is used to provide compressed air to the air pressure chamber.

[0024] In the above scheme, in view of the fact that the slurry flow rate is not convenient to measure directly and accurately, a technical scheme is provided that uses a pneumatic grouting pump as a volumetric pump to measure the piston movement stroke of the pneumatic grouting pump to accurately obtain the slurry flow rate. At the same time, it is a technical scheme that uses an air supply system as the gas source of the pneumatic grouting pump.

[0025] In a specific embodiment, the flow meter includes a permanent magnet mounted on the piston rod of the pneumatic grouting pump and a flux meter mounted in the piston cavity of the pneumatic grouting pump; A pressure reducing valve with adjustable post-valve pressure is arranged on the connecting pipeline between the air pressure chamber and the air supply system, or an overflow pipe is connected to the air pressure chamber, and a regulating valve with adjustable opening is connected to the overflow pipe.

[0026] The above scheme provides a specific implementation method of the flowmeter, that is, a technical solution for determining the position of the permanent magnet by the magnetic flux detected by the fluxmeter, thereby obtaining the piston movement stroke of the pneumatic grouting pump, and at the same time provides a technical solution for adjusting the maximum grouting pressure of the pneumatic grouting pump by adjusting the post-valve pressure of the pressure reducing valve and adjusting the flow of the overflow pipe by adjusting the regulating valve.

[0027] The present solution also relates to a method for treating geological defects of a hydropower station, wherein the method uses the hydropower station geological defect treatment device as described in any one of the above items to treat the geological defects of the hydropower station foundation. In the method, when performing wind drainage treatment on the grouting holes, a detection device is used to detect the air supply resistance of the grouting pipe or the humidity of the air in the grouting pipe; A control module is used to collect the detection results of the detection device, and determine whether the air supply resistance is less than a first set threshold or whether the humidity is less than a second set threshold. When it is determined that the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, the control module sends a stop air supply instruction to the air supply system and the timing module, and the stop air supply instruction triggers the air supply system to stop working and triggers the timing module to start timing; When the count value of the timing module reaches the set value, the trigger control module sends an air supply start instruction to the air supply system, and the air supply start instruction triggers the air supply system to start working; After the air supply system starts working, the control module collects the current detection results of the detection device in real time, and compares the detection results with the first set threshold or the second set threshold. When the air supply system is started more than once, and the duration of the detection result greater than the first set threshold or the second set threshold since the air supply system started working is less than the third set threshold, the control module issues a reminder instruction to complete the grouting hole drainage and an instruction to stop the air supply.

[0028] As described above, the above method is a relevant method in the process of processing geological defects of a hydropower station based on the processing device.

[0029] The present invention has the following beneficial effects: Compared with the prior art, in this scheme, when the command to stop air supply is issued, it means that the current purge has been completed. The next purge is carried out after waiting for a period of time according to the set value, and during the purge process, it is determined whether the current state meets the grouting requirements according to the duration. If the duration is longer than the third set threshold, when the purge is judged to be less than the first set threshold or the humidity is less than the second set threshold, the air supply of this stage is stopped, and the next stage of air supply purge is triggered according to the set value until the grouting hole drainage is completed by the duration. According to the above settings, this scheme can realize the automation of the grouting hole drainage process and improve the degree of automation of the geological defect processing process. At the same time, the relevant settings can effectively ensure the drainage quality of the grouting holes, which is beneficial to ensuring the grouting quality in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the system structure of a specific embodiment of a hydropower station geological defect treatment device described in this scheme; Figure 2 This is a method flow chart of a specific embodiment of a method for treating geological defects in a hydropower station described in this scheme. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments: Example

[0032] like Figure 1 and Figure 2 Provided is a hydropower station geological defect treatment device, comprising a grouting pipe and a return grouting pipe for chemical grouting, an air supply system for injecting compressed air into the grouting hole through the return grouting pipe, and a detection device for detecting the air supply resistance of the return grouting pipe or the humidity of the air in the grouting pipe; It also includes a control module and a timing module, wherein the control module is used to: collect the detection results of the detection device, and determine whether the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, and when it is determined that the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, send a stop air supply instruction to the air supply system and the timing module, and the stop air supply instruction is used to trigger the air supply system to stop working and trigger the timing module to start timing; The timing module is also used to: when the count value of the timing module reaches a set value, trigger the control module to send an air supply start instruction to the air supply system, and the air supply start instruction is used to trigger the air supply system to start working; The control module is also used to: after the air supply system starts working, collect the current detection results of the detection device in real time, and compare the detection results with the first set threshold or the second set threshold; when the air supply system is started more than once, and the duration of the detection result greater than the first set threshold or the second set threshold since the air supply system started working is less than the third set threshold, issue a reminder instruction to complete the drainage of the grouting holes, and issue an instruction to stop the air supply.

[0033] In the process of using chemical grouting to treat the geological defects of the hydropower station foundation, the process involved includes grouting hole flushing and grouting hole drainage based on compressed air. Among them, grouting hole flushing is used to remove the residue in the hole and clean the cracks to ensure the grouting quality and improve the grouting effect. Grouting hole drainage is used to avoid the influence of water on the bonding and curing characteristics of the slurry, thereby ensuring the curing strength of the slurry and the overall stability of the grouting area after grouting. Regarding whether the grouting hole drainage is completed, the existing means generally use manual observation and detection methods to identify and judge. The grouting area generally has a large number of grouting holes and a long compressed air drainage time for a single grouting hole. At the same time, there is a possibility that after the water in the grouting hole is discharged, the submerged water in the cracks connected to the grouting hole flows into the grouting hole, and the wall water further gathers in the grouting hole. Based on the above, the design purpose of this scheme is to provide a technical solution that can effectively improve the degree of automation of chemical grouting, and at the same time, through reliable grouting hole drainage, the quality of grouting can be guaranteed.

[0034] During specific application, the grouting pipe is inserted to the bottom of the grouting hole, and when the compressed air pressure provided by the air supply system is injected into the return-grouting pipe through the return-grouting pipe, if there is water in the grouting hole, before the water is blown out, it can be detected through the return-grouting pipe that there is a large air supply resistance, and the air therein has a large humidity through the grouting pipe. Based on this, the control module determines through the collection results whether the water in the grouting hole is discharged by the compressed air at this time; as the compressed air is continuously injected, when the control module determines that the water in the grouting hole is blown out according to the set first set threshold value or the second set threshold value and the collected detection results, it triggers the air supply system to stop working and triggers the timing module to start timing. The air supply system stops working and stops injecting compressed air into the grouting hole. The timing module starts timing to determine the time when the air supply system starts to supply air next time, and during the period when the air supply is stopped, the potential in the cracks is Water and wall water gather at the bottom of the grouting hole. According to the timing result of the timing module, when the count value reaches the set value, the air supply system starts to work, and after the air supply system starts to work, the control module collects the current detection result of the detection device in real time, and continues to compare the detection result with the first set threshold or the second set threshold. When the air supply system is not started for the first time, and since the air supply system starts to work, the duration of the detection result greater than the first set threshold or the second set threshold is less than the third set threshold, it is considered that the water in the current grouting hole is discharged in a faster time. During the period when the air supply system stops working, the amount of water gathered in the grouting hole is small. At this time, there is a small amount of wall water that will gather in the grouting hole and / or a small amount of submergence in the cracks. At this time, the state of the grouting area is suitable for high-quality slurry injection to reliably deal with geological defects.

[0035] In summary, when the command to stop air supply is issued, it means that the current purge has been completed. The next purge will be carried out after waiting for a period of time according to the set value, and during the purge process, it is determined whether the current state meets the grouting requirements according to the duration. If the duration is longer than the third set threshold, when the purge is judged to be less than the first set threshold or the humidity is less than the second set threshold, the air supply of this stage is stopped, and the next stage of air supply purge is triggered according to the set value until the grouting hole drainage is completed by the duration. According to the above settings, this scheme can realize the automation of the grouting hole drainage process and improve the degree of automation of the geological defect processing process. At the same time, the relevant settings can effectively ensure the drainage quality of the grouting holes, which is beneficial to ensuring the grouting quality in the later stage.

[0036] It is easy to understand that in this scheme, it is set to start the air supply system more than once, with the purpose of requiring at least one compressed air purge to solve the water introduced during the flushing of the grouting hole. After completing at least one compressed air purge, in the later purge stage, the duration is judged to determine the amount of water gathered in the grouting hole during the purge stop stage, thereby obtaining the water situation in the grouting hole wall and the cracks connected to the grouting hole. The first set threshold and the second set threshold can be set according to the current geological characteristics and the requirements of the slurry on the environment, and the set value and the third set threshold can be determined based on the geological characteristics of the exploration and combined with experience.

[0037] Based on the above concept, a more detailed technical solution is as follows: the air supply system includes an air compressor and an air storage tank, a drain valve is provided at the bottom of the air storage tank, and the return slurry pipe is connected to the air storage tank through an air duct.

[0038] In the above scheme, the design of the air supply system is used to solve the problem of the source of compressed air, and enables the air compressor to work intermittently to improve the utilization rate of the air compressor. Specifically, when the compressed air consumption in the air tank is equal to or lower than the set lower pressure limit, the air compressor works to replenish the pressure of the air tank, and the steam trap is used to discharge the water retained at the bottom of the air tank, so that the air supply system can provide stable and relatively dry compressed air for the return slurry pipe.

[0039] Based on the above concept, a more detailed technical solution is as follows: a throttling pipe and a post-valve pressure control valve are provided on the induced air pipe, and the post-valve pressure control valve is located on the induced air pipe between the throttling pipe and the gas storage tank; The detection device comprises a pressure sensor for measuring the internal pressure of the induced draft pipe, wherein the pressure sampling point of the pressure sensor is located on the induced draft pipe between the throttling pipe and the return slurry pipe; The control module is used to collect and count the detection results of the pressure sensor, and when the pressure sensor has a stable detection result that is less than a set pressure value, it is determined that the air supply resistance is less than a first set threshold.

[0040] In the above scheme, in view of the fact that the internal pressure of the air storage tank fluctuates during use, the pressure control valve behind the valve is used to control the pressure of the compressed air in the rear end air duct, so that the front end air duct of the throttling pipe has a relatively stable pressure. Under such application, as the water in the grouting hole is continuously discharged, the air flow resistance of the air path between the compressed air inlet of the return pipe and the compressed air outlet of the grouting pipe becomes smaller, and the flow rate at the pressure sampling point of the pressure sensor increases. Therefore, the accurate change of the air supply resistance can be obtained through the detection results of the pressure sensor, thereby improving the accuracy of the detection results of the detection device.

[0041] Based on the above concept, a more detailed technical solution is as follows: a throttling pipe and a post-valve pressure control valve are provided on the induced air pipe, and the post-valve pressure control valve is located on the induced air pipe between the throttling pipe and the gas storage tank; The detection device comprises a flow meter connected in series to the induced air pipe, and the flow meter is located on the induced air pipe between the throttling pipe and the return slurry pipe; The control module is used to collect and count the detection results of the flow meter, and when the flow meter has a detection result that is stable and greater than a set flow value, it is determined that the air supply resistance is less than a first set threshold.

[0042] As a technical solution based on a flow meter and parallel to the above-mentioned pressure sensor detection method, specifically, in view of the fact that the internal pressure of the air storage tank fluctuates during use, a post-valve pressure control valve is used to control the pressure of the compressed air in the rear end air duct, so that the front end air duct of the throttling pipe has a relatively stable pressure. Under such application, as the water in the grouting hole is continuously discharged, the air flow resistance of the air path between the compressed air inlet of the return pipe and the compressed air outlet of the grouting pipe becomes smaller, and the changing trend of the flow increase can be obtained through the flow meter. Therefore, the accurate change of the air supply resistance can be obtained through the detection results of the flow meter, thereby improving the accuracy of the detection results of the detection device.

[0043] Based on the above concept, a more detailed technical solution is as follows: the detection device includes a humidity sensor for measuring the air humidity in the slurry return pipe; The control module is used to collect and count the detection results of the humidity sensor, and when the humidity sensor has a stable detection result that is less than a set humidity value, it is determined that the humidity of the air in the return slurry pipe is less than a second set threshold.

[0044] The above scheme is a technical scheme that uses a humidity sensor to detect the air humidity in the grouting pipe to determine whether there is any unauthorized water in the grouting hole. In specific applications, as the water is continuously discharged under the action of compressed air, the humidity sensor has a process in which the detection result gradually decreases. When the detection result is stable, it means that the compressed air cannot further discharge the water. The technicians in this field can set the humidity value according to the current geological characteristics and the requirements of the geology and grouting materials for the grouting conditions.

[0045] Based on the above concept, a more detailed technical solution is: it also includes a grouting pump for providing slurry to the grouting pipe, the grouting pump is a pneumatic grouting pump, the pneumatic grouting pump is connected to a slurry pump, the outlet of the slurry pump is connected to the slurry inlet of the pneumatic grouting pump, and the inlet of the slurry pump is connected to a slurry tank for providing slurry to the slurry pump.

[0046] The above scheme provides a specific implementation method of a grouting pump, the purpose of which is that the compressed air provided to the pneumatic grouting pump determines the maximum grouting pressure of the slurry. In this application, it can avoid damage to the grouting system due to excessive grouting pressure, safety accidents, and damage to geological structures due to grouting. At the same time, the above scheme provides a technical solution based on a slurry pump and a slurry tank, which can realize the automatic supply of slurry to the pneumatic grouting pump.

[0047] On the basis of the above concept, a more detailed technical solution is: it also includes a three-way valve, the air supply system is connected to the slurry return pipe and the pneumatic grouting pump through the three-way valve, and the three-way valve is equipped with an electric drive mechanism or a pneumatic drive mechanism for controlling the opening state of the three-way valve; The three-way valve is used to switch the conduction state between the grouting pipe and the air supply system and the pneumatic grouting pump, and the electric drive mechanism or the pneumatic drive mechanism is used to drive the three-way valve to operate.

[0048] In the above scheme, the air supply system serves as a common gas source for the drainage of the return grout pipe and the pneumatic grouting pump. After the drainage of the grouting hole is completed, the electric drive mechanism or the pneumatic drive mechanism can be switched to the air supply system and connected to the pneumatic grouting pump. When used in an automated grouting system, under relevant control instructions, the grouting system can automatically switch from the grouting hole drainage stage to the slurry drainage stage (in this stage, slurry is injected through the grouting pipe, and the valve on the return grout pipe is in an open state to achieve further drainage of the grouting hole through the slurry flowing through the grouting pipe and the return grout pipe. After the drainage in this stage is completed, the valve on the return grout pipe is closed to proceed to the next stage of pressure grouting process).

[0049] Based on the above concept, a more detailed technical solution is as follows: the pneumatic grouting pump is provided with a flow meter for measuring the slurry flow rate by detecting the piston movement stroke of the pneumatic grouting pump; The air pressure chamber of the pneumatic grouting pump is connected to an air supply system, and the air supply system is used to provide compressed air to the air pressure chamber.

[0050] In the above scheme, in view of the fact that the slurry flow rate is not convenient to measure directly and accurately, a technical scheme is provided that uses a pneumatic grouting pump as a volumetric pump to measure the piston movement stroke of the pneumatic grouting pump to accurately obtain the slurry flow rate. At the same time, it is a technical scheme that uses an air supply system as the gas source of the pneumatic grouting pump.

[0051] Based on the above concept, a more detailed technical solution is as follows: the flow meter includes a permanent magnet installed on the piston rod of the pneumatic grouting pump and a flux meter installed in the piston cavity of the pneumatic grouting pump; A pressure reducing valve with adjustable post-valve pressure is arranged on the connecting pipeline between the air pressure chamber and the air supply system, or an overflow pipe is connected to the air pressure chamber, and a regulating valve with adjustable opening is connected to the overflow pipe.

[0052] The above scheme provides a specific implementation method of the flowmeter, that is, a technical solution for determining the position of the permanent magnet by the magnetic flux detected by the fluxmeter, thereby obtaining the piston movement stroke of the pneumatic grouting pump, and at the same time provides a technical solution for adjusting the maximum grouting pressure of the pneumatic grouting pump by adjusting the post-valve pressure of the pressure reducing valve and adjusting the flow of the overflow pipe by adjusting the regulating valve.

[0053] The present solution also relates to a method for treating geological defects of a hydropower station, wherein the method uses the hydropower station geological defect treatment device as described in any one of the above items to treat the geological defects of the hydropower station foundation. In the method, when performing wind drainage treatment on the grouting holes, a detection device is used to detect the air supply resistance of the grouting pipe or the humidity of the air in the grouting pipe; A control module is used to collect the detection results of the detection device, and determine whether the air supply resistance is less than a first set threshold or whether the humidity is less than a second set threshold. When it is determined that the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, the control module sends a stop air supply instruction to the air supply system and the timing module, and the stop air supply instruction triggers the air supply system to stop working and triggers the timing module to start timing; When the count value of the timing module reaches the set value, the trigger control module sends an air supply start instruction to the air supply system, and the air supply start instruction triggers the air supply system to start working; After the air supply system starts working, the control module collects the current detection results of the detection device in real time, and compares the detection results with the first set threshold or the second set threshold. When the air supply system is started more than once, and the duration of the detection result greater than the first set threshold or the second set threshold since the air supply system started working is less than the third set threshold, the control module issues a reminder instruction to complete the grouting hole drainage and an instruction to stop the air supply.

[0054] As described above, the above method is a relevant method in the process of processing geological defects of a hydropower station based on the processing device.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for treating geological defects in a hydropower station, comprising a grouting pipe and a return grouting pipe for chemical grouting, and also comprising an air supply system for injecting compressed air into the grouting hole through the return grouting pipe, characterized in that: It also includes a detection device, which is used to detect the air supply resistance of the grout return pipe or the humidity of the air in the grouting pipe; It also includes a control module and a timing module, wherein the control module is used to: collect the detection results of the detection device, and determine whether the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, and when it is determined that the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, send a stop air supply instruction to the air supply system and the timing module, and the stop air supply instruction is used to trigger the air supply system to stop working and trigger the timing module to start timing; The timing module is also used to: when the count value of the timing module reaches a set value, trigger the control module to send an air supply start instruction to the air supply system, and the air supply start instruction is used to trigger the air supply system to start working; The control module is also used to: after the air supply system starts working, collect the current detection results of the detection device in real time, and compare the detection results with the first set threshold or the second set threshold; when the air supply system is started more than once, and the duration of the detection result greater than the first set threshold or the second set threshold since the air supply system started working is less than the third set threshold, issue a reminder instruction to complete the drainage of the grouting holes, and issue an instruction to stop the air supply.

2. A hydropower station geological defect treatment device according to claim 1, characterized in that: The air supply system comprises an air compressor and an air storage tank. A drain valve is arranged at the bottom of the air storage tank. The return slurry pipe is connected to the air storage tank through an air duct.

3. A hydropower station geological defect treatment device according to claim 2, characterized in that: The air duct is provided with a throttling pipe fitting and a post-valve pressure control valve, and the post-valve pressure control valve is located on the air duct between the throttling pipe fitting and the air storage tank; The detection device comprises a pressure sensor for measuring the internal pressure of the induced draft pipe, wherein the pressure sampling point of the pressure sensor is located on the induced draft pipe between the throttling pipe and the return slurry pipe; The control module is used to collect and count the detection results of the pressure sensor, and when the pressure sensor has a stable detection result that is less than a set pressure value, it is determined that the air supply resistance is less than a first set threshold.

4. A hydropower station geological defect treatment device according to claim 2, characterized in that: The air duct is provided with a throttling pipe fitting and a post-valve pressure control valve, and the post-valve pressure control valve is located on the air duct between the throttling pipe fitting and the air storage tank; The detection device comprises a flow meter connected in series to the induced air pipe, and the flow meter is located on the induced air pipe between the throttling pipe and the return slurry pipe; The control module is used to collect and count the detection results of the flow meter, and when the flow meter has a detection result that is stable and greater than a set flow value, it is determined that the air supply resistance is less than a first set threshold.

5. A hydropower station geological defect treatment device according to claim 2, characterized in that: The detection device includes a humidity sensor for measuring the air humidity in the slurry return pipe; The control module is used to collect and count the detection results of the humidity sensor, and when the humidity sensor has a stable detection result that is less than a set humidity value, it is determined that the humidity of the air in the return slurry pipe is less than a second set threshold.

6. A hydropower station geological defect treatment device according to claim 1, characterized in that: It also includes a grouting pump for providing slurry to the grouting pipe. The grouting pump is a pneumatic grouting pump, which is connected to a slurry pump. The outlet of the slurry pump is connected to the slurry inlet of the pneumatic grouting pump, and the inlet of the slurry pump is connected to a slurry tank for providing slurry to the slurry pump.

7. A hydropower station geological defect treatment device according to claim 6, characterized in that: It also includes a three-way valve, the air supply system is connected to the slurry return pipe and the pneumatic grouting pump through the three-way valve, and the three-way valve is equipped with an electric drive mechanism or a pneumatic drive mechanism for controlling the opening state of the three-way valve; The three-way valve is used to switch the conduction state between the grouting pipe and the air supply system and the pneumatic grouting pump, and the electric drive mechanism or the pneumatic drive mechanism is used to drive the three-way valve to operate.

8. A hydropower station geological defect treatment device according to claim 6, characterized in that: The pneumatic grouting pump is provided with a flow meter for measuring the slurry flow rate by detecting the piston movement stroke of the pneumatic grouting pump; The air pressure chamber of the pneumatic grouting pump is connected to an air supply system, and the air supply system is used to provide compressed air to the air pressure chamber.

9. A hydropower station geological defect treatment device according to claim 8, characterized in that: The flow meter includes a permanent magnet mounted on the piston rod of the pneumatic grouting pump and a flux meter mounted in the piston cavity of the pneumatic grouting pump; A pressure reducing valve with adjustable post-valve pressure is arranged on the connecting pipeline between the air pressure chamber and the air supply system, or an overflow pipe is connected to the air pressure chamber, and a regulating valve with adjustable opening is connected to the overflow pipe.

10. A method for treating geological defects in a hydropower station, characterized in that: The method uses the hydropower station geological defect treatment device described in any one of claims 1 to 9 to treat the geological defects of the hydropower station foundation. In the method, when performing wind drainage treatment on the grouting holes, a detection device is used to detect the air supply resistance of the grouting pipe or the humidity of the air in the grouting pipe; A control module is used to collect the detection results of the detection device, and determine whether the air supply resistance is less than a first set threshold or whether the humidity is less than a second set threshold. When it is determined that the air supply resistance is less than the first set threshold or the humidity is less than the second set threshold, the control module sends a stop air supply instruction to the air supply system and the timing module, and the stop air supply instruction triggers the air supply system to stop working and triggers the timing module to start timing; When the count value of the timing module reaches the set value, the trigger control module sends an air supply start instruction to the air supply system, and the air supply start instruction triggers the air supply system to start working; After the air supply system starts working, the control module collects the current detection results of the detection device in real time, and compares the detection results with the first set threshold or the second set threshold. When the air supply system is started more than once, and the duration of the detection result greater than the first set threshold or the second set threshold since the air supply system started working is less than the third set threshold, the control module issues a reminder instruction to complete the grouting hole drainage and an instruction to stop the air supply.

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