A segmented flow measurement device for tunnel drainage holes

Abstract

The present invention provides a tunnel drainage hole segmented flow measurement device, belonging to the field of liquid flow measurement technology, comprising a cylindrical housing, a first water inlet channel arranged on the housing, a first conveying channel connected to the first water inlet channel, a first flow meter connected to the first conveying channel, a blocking device arranged on both sides of the first water inlet channel, and a blocking controller for controlling the blocking device. By using such a tunnel drainage hole segmented flow measurement device, water flow can be measured in different regions through the drilled drainage holes, and groundwater flow at different locations can be measured in segments and regions for tunnel drainage holes with a long length and complex geological conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid flow measurement, and more specifically relates to a segmented flow measurement device for a tunnel drainage hole. Background Art

[0002] Groundwater can have many adverse effects on tunnel construction, which mainly include: 1) Impact on tunnel stability: Groundwater will affect the stability of the tunnel. If the groundwater level is too high, the stability of the tunnel may be reduced, and even the collapse of the tunnel may occur. 2) Increased construction difficulty: Groundwater will increase the difficulty of tunnel construction. During the construction process, continuous drainage is required to ensure the normal progress of the construction. This will not only increase the cost of construction, but also prolong the construction time. 3) Drainage during tunnel construction may have an impact on the surrounding environment, such as changing the groundwater level and affecting the humidity of the surrounding soil. 4) The presence of groundwater may increase the safety risks of tunnel construction, such as collapse caused by groundwater scouring and leakage of harmful substances in groundwater.

[0003] In the prior art, some tunnel construction uses advanced geological exploration technology to detect geological information in front of the construction surface. For some different types of groundwater, such as loose layer pore water and bedrock fissure water, it is usually necessary to treat the groundwater before continuing tunnel construction. The process of treating groundwater is usually to drill holes to drain the groundwater and then inject grouting to seal these seepage gaps. The drilled holes are tunnel drainage holes.

[0004] However, some existing grouting processes require differentiated regional grouting based on information such as groundwater volume and water flow rate. The existing method of measuring water flow rate is not targeted and has low efficiency. Summary of the invention

[0005] Based on this, the object of the present invention is to provide a segmented flow measurement device for a tunnel drainage hole, which is used to monitor the water flow of the drainage hole during the grouting and water plugging construction of water-rich fissures in the tunnel; the flow measurement device includes a cylindrical shell, a first water inlet channel arranged on the shell, a first conveying channel connected to the first water inlet channel, a first flow meter connected to the first conveying channel, a plugging device arranged on both sides of the first water inlet channel, and a plugging controller for controlling the plugging device;

[0006] The shell is used to pass through the tunnel drainage hole and place the first water inlet channel in a position to measure water flow, and the first water inlet channel is arranged on the surface of the shell; the blocking controller can control the blocking device to block the drainage hole, and after the blocking device blocks the drainage hole, only the water flow between the two blocking devices inside the tunnel drainage hole can flow into the first conveying channel through the first water inlet channel; the first flowmeter is used to measure the water flow in the area where the first water inlet channel is located.

[0007] Preferably, the flow measurement device further comprises a second water inlet channel provided on the housing, a second delivery channel connected to the second water inlet channel, and a second flow meter connected to the second delivery channel;

[0008] The first water inlet channel and the second water inlet channel are arranged at different positions in the axial direction of the housing; blocking devices are also arranged on both sides of the second water inlet channel; the area between the blocking devices on both sides of the first water inlet channel is the first metering area, and the area between the blocking devices on both sides of the second water inlet channel is the second metering area;

[0009] The water in the first metering area is transported to the first flow meter through the first transport channel; the water in the second metering area is transported to the second flow meter through the second transport channel.

[0010] Preferably, the blocking device is a flexible airbag, and the blocking controller is an air valve; the flow measurement device further comprises a gas channel connected to the airbag, and the air valve is arranged on the gas channel for controlling the inflation or exhaust of the airbag;

[0011] After being inflated, the flexible airbag can cling to the inner wall of the tunnel drainage hole, blocking the passage for water on both sides of the airbag to flow to each other.

[0012] Preferably, the first water inlet channel is arranged at a position close to the end of the outer shell, the first water inlet channel is circular and hollow inside, a water inlet hole is arranged on the outside of the first water inlet channel, water can flow into the first water inlet channel through the water inlet hole; the first conveying channel is an annular pipe with a hollow inside, the internal space of the first conveying channel is connected to the internal space of the first water inlet channel, and the water inside the first water inlet channel can flow to the first flowmeter through the first conveying channel.

[0013] Preferably, the second water inlet channel is annular with a hollow interior and is sleeved on the outside of the first conveying channel; a water inlet hole is provided on the outside of the second water inlet channel, and water can flow into the second water inlet channel through the water inlet hole;

[0014] The second delivery channel is an internally hollow annular pipe, which is sleeved on the outside of the first delivery channel. The internal space of the second delivery channel is connected to the internal space of the second water inlet channel, and the water inside the second water inlet channel can flow to the second flowmeter through the second delivery channel.

[0015] Preferably, the shell is an annular pipe with a hollow interior and openings at both ends, and the annular channel inside the shell is used to balance the water pressure to prevent the water pressure inside the tunnel drainage hole from increasing after the blocking device blocks the tunnel drainage hole;

[0016] The first water inlet channel and the first conveying channel are sleeved on the outside of the shell; support frames are respectively arranged between the first water inlet channel and the shell, between the first conveying channel and the shell, and between the second conveying channel and the first conveying channel; the support frame is provided with a gap that penetrates the support frame, and water can pass through the gap.

[0017] Preferably, a plurality of filter baffles are arranged on the outside of the first water inlet channel and / or the second water inlet channel; the plurality of filter baffles are evenly arranged in a direction surrounding the first water inlet channel and / or the second water inlet channel; there is a gap between the filter baffles and adjacent filter baffles, and water can flow through the gap; the plurality of filter baffles are used to prevent large-volume impurities in the water flow from entering the first water inlet channel and / or the second water inlet channel.

[0018] Preferably, the flow measurement device includes three airbags, namely a first airbag, a second airbag and a third airbag; the first airbag, the second airbag and the third airbag are arranged along the direction of the shell axis;

[0019] The first water inlet channel is arranged between the first airbag and the second airbag, and the second water inlet channel is arranged between the second airbag and the third airbag;

[0020] An airbag guide plate is arranged on one side of the airbag close to the shell, and the airbag guide plate is used to limit the position of the airbag and control the airbag to expand towards the inner wall of the tunnel drainage hole after being inflated.

[0021] Preferably, the housing is provided with a first annular connector and a second annular connector, and the first annular connector and the second annular connector are provided with an input pipe and an output pipe respectively;

[0022] The input pipe of the first annular connector is connected to the first delivery channel, and the output pipe of the first annular connector is connected to the first flow meter; the input pipe of the second annular connector is connected to the second delivery channel, and the output pipe of the second annular connector is connected to the second flow meter; the first annular connector and the second annular connector are used to gather water flows of the first delivery channel and the second delivery channel respectively, and deliver them to the first flow meter and the second flow meter;

[0023] A filter screen is provided at the connection portion between the first delivery channel and the first annular connector input pipe, and the filter screen is used to filter small-volume impurities.

[0024] Preferably, channel plugs are provided at the ends of the first conveying channel and the second conveying channel, and a driver for controlling the opening and closing of the channel plugs is provided on the housing;

[0025] When the channel plug is closed, the channel plug seals the ends of the first delivery channel and the second delivery channel, and the water flows of the first delivery channel and the second delivery channel all pass through the first flow meter and the second flow meter;

[0026] When the channel plug is open, the ends of the first conveying channel and the second conveying channel are open, and the water flow of the first conveying channel and the second conveying channel can flow out from the ends of the first conveying channel and the second conveying channel; the resistance of the flow measuring device moving in the tunnel drainage hole can be reduced.

[0027] Preferably, the driver is a double-acting hydraulic cylinder, the piston of the double-acting hydraulic cylinder is connected to the channel plug through a connecting rod, and liquid inlets are respectively provided on both sides of the double-acting hydraulic cylinder piston, which are respectively used to control the opening and closing of the channel plug;

[0028] The end of the shell is provided with an external thread, which can be connected to an extension rod provided with a matching internal thread to increase the length of the flow measuring device so that the first water inlet channel can be moved to a position in the tunnel drainage hole where water flow needs to be measured.

[0029] According to an embodiment of the present invention, a segmented flow measurement device for a tunnel drainage hole can measure water flow in different regions through drilled drainage holes. For tunnel drainage holes with a long length and complex geological conditions, groundwater flow at different locations can be measured in segments and regions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present disclosure includes drawings, which should be considered to be included in and constitute a part of the specification, and together with the specification, illustrate various exemplary embodiments, features and aspects of the present disclosure, and are used to explain the principles of the present disclosure. The present invention will be more fully understood through the following detailed description in conjunction with the drawings. Among them:

[0031] Figure 1 is a schematic diagram of a segmented flow measurement device for a tunnel drainage hole according to an embodiment of the present invention;

[0032] Figure 2 is a top view of a segmented flow measurement device for a tunnel drainage hole according to an embodiment of the present invention;

[0033] Figure 3 yes Figure 2 Sectional view along line AA;

[0034] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0035] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle;

[0036] Figure 6 yes Figure 3 A partial enlarged view of point C in the middle;

[0037] Figure 7 yes Figure 3 A partial enlarged view of point D in the middle;

[0038] Figure 8 yes Figure 3 A partial enlarged view of point E in the middle;

[0039] Fig. 9 yes Figure 2 Sectional view along line BB;

[0040] Fig.10 It is a schematic diagram of the internal structure of a segmented flow measurement device for a tunnel drainage hole according to an embodiment of the present invention;

[0041] Fig.11 yes Fig.10 A partial enlarged view of the middle A;

[0042] Fig.12 yes Fig.10 A partial enlarged view of point B in the middle;

[0043] Fig.13 yes Fig.10 A partial enlarged view of point C in the middle;

[0044] Fig.14 yes Fig.10 A partial enlarged view of point D in the middle;

[0045] Fig.15 yes Fig.10 A partial enlarged view of point E in the middle;

[0046] Among them: the outer shell 10, the first water inlet channel 11, the first delivery channel 12, the first flow meter 13, the second water inlet channel 21, the second delivery channel 22, the second flow meter 23, the gas channel 31, the support frame 32, the filter baffle 33, the first air bag 41, the second air bag 42, the third air bag 43, the air bag guide plate 44, the first annular connector 51, the second annular connector 52, the input pipe 53, the output pipe 54, the filter screen 55, the first plug body 61, the second plug body 62, the driver 63, the plug body connecting frame 64, and the extension rod 70. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0048] Groundwater can have many adverse effects on tunnel construction, which mainly include: 1) Impact on tunnel stability: Groundwater will affect the stability of the tunnel. If the groundwater level is too high, the stability of the tunnel may be reduced, and even the collapse of the tunnel may occur. 2) Increased construction difficulty: Groundwater will increase the difficulty of tunnel construction. During the construction process, continuous drainage is required to ensure the normal progress of the construction. This will not only increase the cost of construction, but also prolong the construction time. 3) Drainage during tunnel construction may have an impact on the surrounding environment, such as changing the groundwater level and affecting the humidity of the surrounding soil. 4) The presence of groundwater may increase the safety risks of tunnel construction, such as collapse caused by groundwater scouring and leakage of harmful substances in groundwater.

[0049] In the prior art, some tunnel construction uses advanced geological exploration technology to detect geological information in front of the construction surface. For some different types of groundwater, such as loose layer pore water and bedrock fissure water, it is usually necessary to treat the groundwater before continuing tunnel construction. The process of treating groundwater is usually to drill holes to drain the groundwater and then inject grouting to seal these seepage gaps. The drilled holes are tunnel drainage holes.

[0050] However, some existing grouting processes require differentiated regional grouting based on information such as groundwater volume and water flow rate. The existing method of measuring water flow rate is not targeted and has low efficiency.

[0051] In order to solve the above problems, the object of the present invention is to provide a tunnel drainage hole segmented flow measurement device, which is used to monitor the water flow of the drainage hole during the tunnel water-rich fissure grouting and water plugging construction; the flow measurement device includes a cylindrical housing 10, a first water inlet channel 11 arranged on the housing 10, a first conveying channel 12 connected to the first water inlet channel 11, a first flowmeter 13 connected to the first conveying channel 12, a plugging device arranged on both sides of the first water inlet channel 11, and a plugging controller for controlling the plugging device;

[0052] The shell 10 is used to pass through the tunnel drainage hole and place the first water inlet channel 11 at the position for measuring water flow. The first water inlet channel 11 is arranged on the surface of the shell 10; the blocking controller can control the blocking device to block the drainage hole. After the blocking device blocks the drainage hole, only the water flow between the two blocking devices inside the tunnel drainage hole can flow into the first conveying channel 12 through the first water inlet channel 11; the first flowmeter 13 is used to measure the water flow in the area where the first water inlet channel 11 is located.

[0053] In this embodiment, Figure 1 , Figure 2As shown, the flow measurement device of this embodiment has a long cylindrical shape. When in use, the front end is inserted into the tunnel drainage hole. The tunnel drainage hole refers to a hole drilled during tunnel construction to drain groundwater. There may be accumulated water in the geological environment in front of the tunnel excavation face. The distribution of accumulated water is detected by advanced geological detection technology, and then drainage holes are drilled on the excavation face. The accumulated water can be discharged from the tunnel drainage hole.

[0054] The flow measurement device of this embodiment is used to measure the water flow in different areas of the tunnel drainage hole. Specifically, the tunnel drainage hole may pass through multiple different geological environments, and the flow rate and flow rate of groundwater flowing into the tunnel drainage hole in each area are inconsistent. The flow measurement device can measure these water flows in different areas.

[0055] In the specific implementation process, the shell 10 can be a slender rod-shaped component that can serve as a fixed support for other components. The first water inlet channel 11 and the first conveying channel 12 can be pipes and water inlets arranged on the pipes. Water in the tunnel drainage hole can flow into the first conveying channel 12 through the first water inlet channel 11.

[0056] The blocking device is a component arranged on both sides of the first water inlet channel 11 for blocking water flow. The blocking device can be a device capable of blocking water flow, such as an air bag, a rubber plug, etc. The blocking controller is used to control the state of the blocking device. For example, if the blocking device is an air bag, the blocking controller can be an air compressor capable of generating air pressure or an air valve capable of controlling the flow of gas. The air bag can fit tightly against the inner wall of the tunnel drainage hole to block the water flow.

[0057] In the specific implementation process, the housing 10 is moved in the tunnel drainage hole to the position where the water flow needs to be measured, and then the blocking device is controlled by the blocking controller to block the water flow. When the blocking state is good, only the water flow in the area where the first water inlet channel 11 is located can enter the first conveying device, and the measurement result of the first flowmeter 13 is the water flow in the area where the first water inlet channel 11 is located, that is, the area between the two blocking devices. After the water flow measurement is completed, the blocking controller controls the blocking device to release the blockage, and then the housing 10 can be moved to the next measurement area.

[0058] A tunnel drainage hole segmented flow measurement device can measure water flow in different areas through drilled drainage holes. For tunnel drainage holes with long length and complex geological conditions, groundwater flow in different locations can be measured segmentally and regionally.

[0059] Further, the flow measurement device further includes a second water inlet channel 21 disposed on the housing 10, a second delivery channel 22 connected to the second water inlet channel 21, and a second flow meter 23 connected to the second delivery channel 22;

[0060] The first water inlet channel 11 and the second water inlet channel 21 are arranged at different axial positions of the housing 10; blocking devices are also arranged on both sides of the second water inlet channel 21; the area between the blocking devices on both sides of the first water inlet channel 11 is the first metering area, and the area between the blocking devices on both sides of the second water inlet channel 21 is the second metering area;

[0061] The water in the first metering area is transported to the first flow meter 13 through the first transport channel 12 ; the water in the second metering area is transported to the second flow meter 23 through the second transport channel 22 .

[0062] In this embodiment, Figure 3 , Fig.10 , Fig.14 As shown, the second water inlet channel 21 is arranged near the first water inlet channel 11, and the second delivery channel 22 is independent of the first delivery channel 12. The first water inlet channel 11 and the second water inlet channel 21 can simultaneously measure the flow of two adjacent or close areas. In this embodiment, three blocking devices are arranged, the first one is arranged on the side of the first water inlet channel 11 away from the second water inlet channel 21, the second one is arranged between the first water inlet channel 11 and the second water inlet channel 21, and the third one is arranged on the side of the second water inlet channel 21 away from the first water inlet channel 11.

[0063] In the specific implementation process, the blocking controller can control the three blocking devices independently or jointly.

[0064] Furthermore, the blocking device is a flexible airbag, and the blocking controller is an air valve; the flow measurement device also includes a gas channel 31 connected to the airbag, and the air valve is arranged on the gas channel 31 to control the inflation or exhaust of the airbag;

[0065] After being inflated, the flexible airbag can cling to the inner wall of the tunnel drainage hole, blocking the passage for water on both sides of the airbag to flow to each other.

[0066] This embodiment proposes a specific implementation method of the blocking device, such as Figure 3 , Figure 7 , Fig.13 as well as Fig.14 As shown, the airbag can be a device made of a hollow film, rubber or other material, and its volume can change according to air pressure.

[0067] In the specific implementation process, the air valve can be a two-position three-way solenoid valve, which is respectively connected to the air compressor, the airbag and the exhaust port. The solenoid valve includes two working states, in which the air compressor is connected to the airbag and the airbag is inflated; in the other working state, the airbag is connected to the exhaust port and the airbag is exhausted and contracted.

[0068] Furthermore, the first water inlet channel 11 is arranged at a position close to the end of the outer shell 10, the first water inlet channel 11 is annular and hollow inside, and a water inlet hole is arranged on the outside of the first water inlet channel 11, and water can flow into the first water inlet channel 11 through the water inlet hole; the first conveying channel 12 is an annular pipe with a hollow inside, and the internal space of the first conveying channel 12 is connected to the internal space of the first water inlet channel 11, and the water inside the first water inlet channel 11 can flow to the first flowmeter 13 through the first conveying channel 12.

[0069] This embodiment proposes a specific implementation method of the first water inlet channel 11 and the first delivery channel 12, such as Figure 6 , Figure 7 , Figure 8 , Fig.13 , Fig.14 as well as Fig.15 As shown, the housing 10 of this embodiment is a hollow cylinder with openings at both ends. After the blocking device blocks the water flow, the blocked water flow can be discharged through the channel inside the housing 10, preventing the blocking device from blocking the water flow and causing an increase in water pressure.

[0070] The first conveying channel 12 can be an annular pipe sleeved on the outer side of the front end of the shell 10, and the first water inlet channel 11 is a plurality of water inlet holes on the first conveying channel 12. The plurality of first water inlet holes are evenly distributed on the outer circumferential surface of the first conveying channel 12. Water in the area where the first water inlet holes are located can flow into the first water inlet channel 11 through the water inlet holes; water inside the first water inlet channel 11 can flow to the first flowmeter 13 through the first conveying channel 12.

[0071] Furthermore, the second water inlet channel 21 is a hollow ring and is sleeved on the outside of the first delivery channel 12; a water inlet hole is provided on the outside of the second water inlet channel 21, and water can flow into the second water inlet channel 21 through the water inlet hole;

[0072] The second delivery channel 22 is an internally hollow annular pipe, which is sleeved on the outside of the first delivery channel 12 . The internal space of the second delivery channel 22 is connected to the internal space of the second water inlet channel 21 . Water in the second water inlet channel 21 can flow to the second flowmeter 23 through the second delivery channel 22 .

[0073] In this embodiment, a specific implementation of the second water inlet channel 21 and the second delivery channel 22 is proposed, a step is provided on the first delivery channel 12, the outer diameters on both sides of the step are inconsistent, and the diameter of the part close to the front end of the housing 10 is larger than the diameter of the other side of the step. The first water inlet channel 11 is provided on the part close to the front end of the housing 10.

[0074] The second delivery channel 22 is sleeved on the portion of the step away from the front end of the housing 10, and the second delivery channel 22 is flush with the portion of the step close to the front end of the housing 10. The second water inlet channel 21 is a plurality of water inlet holes arranged on the circumferential surface of the second delivery channel 22, and the plurality of water inlet holes are evenly distributed on the outer circumferential surface of the second delivery channel 22. Water in the area where the second water inlet holes are located can flow into the second water inlet channel 21 through the water inlet holes; water inside the second water inlet channel 21 can flow to the second flowmeter 23 through the second delivery channel 22.

[0075] Furthermore, the housing 10 is an annular pipe with a hollow interior and openings at both ends. The annular channel inside the housing 10 is used to balance the water pressure to prevent the water pressure inside the tunnel drainage hole from increasing after the blocking device blocks the tunnel drainage hole.

[0076] The first water inlet channel 11 and the first conveying channel 12 are sleeved on the outside of the outer shell 10; support frames 32 are respectively arranged between the first water inlet channel 11 and the outer shell 10, between the first conveying channel 12 and the outer shell 10, and between the second conveying channel 22 and the first conveying channel 12; the support frame 32 is provided with a gap that penetrates the support frame 32, and water can pass through the gap.

[0077] This embodiment proposes a specific implementation method of the shell 10, which is an annular pipe with a hollow interior and openings at both ends. The annular channel inside the shell 10 is used to balance the water pressure to prevent the water pressure inside the tunnel drainage hole from increasing after the blocking device blocks the tunnel drainage hole; the first conveying channel 12 can be a pipe with an inner diameter greater than the outer diameter of the shell 10, and the first conveying channel 12 is sleeved on the outside of the shell 10. A support frame 32 is provided between the outer wall of the shell 10 and the inner wall of the first conveying channel 12, and the support frame 32 is used to fix the relative position between the shell 10 and the first conveying channel 12.

[0078] Similarly, the second conveying channel 22 can be a pipe with an inner diameter greater than the outer diameter of the first conveying channel 12. The second conveying channel 22 is sleeved on the outside of the first conveying channel 12. A support frame 32 is provided between the outer wall of the first conveying channel 12 and the inner wall of the second conveying channel 22. The support frame 32 is used to fix the relative position between the first conveying channel 12 and the second conveying channel 22. As mentioned above, a step is provided on the first conveying channel 12, and the outer diameters on both sides of the step are inconsistent. The second conveying channel 22 is provided on the side of the step away from the front end of the shell 10. The front end of the shell 10 is the end of the shell 10 that first extends into the tunnel drainage hole.

[0079] Furthermore, a plurality of filter baffles 33 are provided on the outer side of the first water inlet channel 11 and / or the second water inlet channel 21; the plurality of filter baffles 33 are evenly arranged in a direction surrounding the first water inlet channel 11 and / or the second water inlet channel 21; there is a gap between the filter baffles 33 and adjacent filter baffles 33, and water can flow through the gap; the plurality of filter baffles 33 are used to prevent large-volume impurities in the water flow from entering the first water inlet channel 11 and / or the second water inlet channel 21.

[0080] In some embodiments, Figure 6 , Figure 7 , Figure 8 , Fig. 9 as well as Fig.10 As shown, a filter baffle 33 for filtering impurities is provided on the outside of the first water inlet channel 11 and / or the second water inlet channel 21, the length direction of the filter baffle 33 is parallel to the axis of the outer shell 10, and the width direction of the filter baffle 33 is colinear with a diameter direction of the outer shell 10, and multiple filter baffles 33 are radially arranged around the radial direction of the first water inlet channel 11 and / or the second water inlet channel 21.

[0081] In the specific implementation process, there is a gap between the filter baffle 33 and the adjacent filter baffle 33, and the water flow can pass through the gap, while the impurities in the tunnel drainage hole cannot pass through the gap. These impurities may be stones, soil blocks, etc.

[0082] Further, the flow measurement device includes three airbags, namely a first airbag 41, a second airbag 42 and a third airbag 43; the first airbag 41, the second airbag 42 and the third airbag 43 are arranged along the axis direction of the housing 10;

[0083] The first water inlet channel 11 is disposed between the first airbag 41 and the second airbag 42, and the second water inlet channel 21 is disposed between the second airbag 42 and the third airbag 43;

[0084] An airbag guide plate 44 is provided on one side of the airbag close to the shell 10 , and the airbag guide plate 44 is used to limit the position of the airbag and control the airbag to expand toward the inner wall of the tunnel drainage hole after being inflated.

[0085] In some embodiments, the flow measuring device includes three airbags, the first airbag 41 is arranged on the side of the first water inlet channel 11 away from the second water inlet channel 21, the second airbag 42 is arranged between the first water inlet channel 11 and the second water inlet channel 21, and the third airbag 43 is arranged on the side of the second water inlet channel 21 away from the first water inlet channel 11.

[0086] The air valve can be a two-position three-way solenoid valve, which is respectively connected to the air compressor, the airbag and the exhaust port. The solenoid valve includes two working states, in one working state, the air compressor is connected to the airbag and the airbag is inflated; in the other working state, the airbag is connected to the exhaust port and the airbag is exhausted and contracted.

[0087] The air valve is connected to the airbag through the air channel 31, which can pass through the airbag. The air channel 31 is provided with air holes, and the gas inside the air channel 31 can be output from the air holes to pressurize the airbag. Conversely, when exhausting, the gas in the airbag can be output from the air holes. The airbag guide plate 44 includes an annular plate arranged in a trumpet shape on both sides of the airbag. The airbag guide plate 44 is used to limit the position of the airbag and control the airbag to expand in a direction close to the inner wall of the tunnel drainage hole after inflation.

[0088] Furthermore, the housing 10 is provided with a first annular connector 51 and a second annular connector 52, and the first annular connector 51 and the second annular connector 52 are provided with an input pipe 53 and an output pipe 54 respectively;

[0089] The input pipe 53 of the first annular connector 51 is connected to the first delivery channel 12, and the output pipe 54 of the first annular connector 51 is connected to the first flow meter 13; the input pipe 53 of the second annular connector 52 is connected to the second delivery channel 22, and the output pipe 54 of the second annular connector 52 is connected to the second flow meter 23; the first annular connector 51 and the second annular connector 52 are used to gather the water flow of the first delivery channel 12 and the second delivery channel 22, respectively, and deliver them to the first flow meter 13 and the second flow meter 23;

[0090] A filter screen 55 is provided at the connection portion between the first delivery channel 12 and the input pipe 53 of the first annular connector 51 . The filter screen 55 is used to filter small-volume impurities.

[0091] In some embodiments, Figure 4 , Figure 5 , Fig.10 , Fig.11 as well as Fig.12 As shown, the first annular connector 51 and the second annular connector 52 are used to gather the water flow of the first delivery channel 12 and the second delivery channel 22 respectively, and deliver them to the first flow meter 13 and the second flow meter 23; the filter 55 is provided with fine meshes, the water flow can pass through these meshes, and the impurities in the water flow cannot pass through these meshes. After the channel plug is opened, the water flow can wash away the impurities on the filter 55, playing the role of cleaning the filter 55.

[0092] Further, the ends of the first conveying channel 12 and the second conveying channel 22 are provided with channel plugs, and the housing 10 is provided with a driver 63 for controlling the opening and closing of the channel plugs;

[0093] When the channel plug is closed, the channel plug seals the ends of the first delivery channel 12 and the second delivery channel 22, and the water flows of the first delivery channel 12 and the second delivery channel 22 all pass through the first flow meter 13 and the second flow meter 23;

[0094] When the channel plug is open, the ends of the first conveying channel 12 and the second conveying channel 22 are open, and the water flow of the first conveying channel 12 and the second conveying channel 22 can flow out from the ends of the first conveying channel 12 and the second conveying channel 22; the resistance of the flow measuring device moving in the tunnel drainage hole can be reduced.

[0095] In this embodiment, the channel plug is used to control the water flow path to reduce the resistance when moving the flow measurement device, such as Figure 4 , Figure 5 , Fig.11 as well as Fig.12 As shown, the channel plug includes a first plug body 61 disposed at the tail of the first delivery channel 12 and a second plug body 62 disposed at the tail of the second delivery channel 22, and also includes a plug body connecting frame 64 connecting the first plug body 61, the second plug body 62 and the driver 63. The driver 63 can push the plug body connecting frame 64 to move back and forth, thereby opening or closing the channel plug.

[0096] Further, the driver 63 is a double-acting hydraulic cylinder, the piston of which is connected to the channel plug via a connecting rod, and liquid inlets are provided on both sides of the piston of the double-acting hydraulic cylinder, respectively, for controlling the opening and closing of the channel plug;

[0097] The end of the housing 10 is provided with an external thread, which can be connected to an extension rod 70 provided with a matching internal thread to increase the length of the flow measurement device so that the first water inlet channel 11 can be moved to a position in the tunnel drainage hole where water flow needs to be measured.

[0098] This embodiment proposes a specific implementation method of the driver 63. The driver 63 is a double-acting hydraulic cylinder. The double-acting hydraulic cylinder has two liquid inlets. When liquid is taken in by one inlet, liquid is discharged from the other inlet, which can control the piston to move forward or backward.

[0099] The rear end of the shell 10 is provided with an external thread, which can be connected to an extension rod 70. The front end of the extension rod 70 can be connected to the end of the shell 10 through a thread. The rear section of the extension rod 70 can also be connected to another extension rod 70. The extension rod 70 can increase the distance that the flow measuring device moves in the tunnel drainage hole.

[0100] In some embodiments, in order to make the thrust uniform, two drivers 63 are provided on both sides of the housing 10 .

[0101] The various embodiments disclosed in the present invention have been described above. The above description is exemplary and not exhaustive, and the scope of the present invention is not limited to the above embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the spirit and scope of the present invention. In other words, those of ordinary skill in the art can make various changes and improvements to the present invention in form and detail, and these are considered to fall within the scope of protection of the present invention. The choice of terms used herein is intended to best explain the principles of the various embodiments, practical applications, or improvements to the technology in the market, or to enable those of ordinary skill in the art to understand the various embodiments disclosed herein.

Claims

1. A segmented flow measurement device for tunnel drainage holes, used to monitor the water flow of drainage holes during grouting and water plugging construction of water-rich fissures in tunnels; it is characterized by: The flow measurement device comprises a cylindrical housing (10), a first water inlet channel (11) arranged on the housing (10), a first delivery channel (12) connected to the first water inlet channel (11), a first flow meter connected to the first delivery channel (12), blocking devices arranged on both sides of the first water inlet channel (11), and a blocking controller for controlling the blocking devices; The housing (10) is used to pass through the tunnel drainage hole and place the first water inlet channel (11) at a position for measuring water flow, and the first water inlet channel (11) is arranged on the surface of the housing (10); the blocking controller can control the blocking device to block the drainage hole, and after the blocking device blocks the drainage hole, only the water flow between the two blocking devices inside the tunnel drainage hole can flow into the first conveying channel (12) through the first water inlet channel (11); the first flow meter is used to measure the water flow in the area where the first water inlet channel (11) is located; The flow measurement device further comprises a second water inlet channel (21) arranged on the housing (10), a second delivery channel (22) connected to the second water inlet channel (21), and a second flow meter (23) connected to the second delivery channel (22); The first water inlet channel (11) and the second water inlet channel (21) are arranged at different axial positions of the housing (10); blocking devices are also arranged on both sides of the second water inlet channel (21); the area between the blocking devices on both sides of the first water inlet channel (11) is the first metering area, and the area between the blocking devices on both sides of the second water inlet channel (21) is the second metering area; Water in the first metering area is transported to the first flow meter through the first transport channel (12); water in the second metering area is transported to the second flow meter (23) through the second transport channel (22); Channel plugs are provided at the ends of the first conveying channel (12) and the second conveying channel (22), and a driver (63) for controlling the opening and closing of the channel plugs is provided on the housing (10); When the channel plug is in a closed state, the channel plug seals the ends of the first delivery channel (12) and the second delivery channel (22), and the water flows in the first delivery channel (12) and the second delivery channel (22) all pass through the first flow meter and the second flow meter (23); When the channel plug is in the open state, the ends of the first conveying channel (12) and the second conveying channel (22) are open, and water in the first conveying channel (12) and the second conveying channel (22) can flow out from the ends of the first conveying channel (12) and the second conveying channel (22); thus reducing the resistance of the flow measuring device moving in the tunnel drainage hole.

2. A tunnel drainage hole segmented flow measurement device according to claim 1, characterized in that: The blocking device is a flexible airbag, and the blocking controller is an air valve; the flow measurement device also includes a gas channel connected to the airbag, and the air valve is arranged on the gas channel to control the inflation or exhaust of the airbag; After being inflated, the flexible airbag can cling to the inner wall of the tunnel drainage hole, blocking the passage for water on both sides of the airbag to flow to each other.

3. A tunnel drainage hole segmented flow measurement device according to claim 1, characterized in that: The first water inlet channel (11) is arranged at a position close to the end of the housing (10); the first water inlet channel (11) is annular and hollow inside; a water inlet hole is arranged outside the first water inlet channel (11); water can flow into the first water inlet channel (11) through the water inlet hole; the first delivery channel (12) is an annular pipe with a hollow inside; the internal space of the first delivery channel (12) is connected to the internal space of the first water inlet channel (11); water inside the first water inlet channel (11) can flow to the first flow meter through the first delivery channel (12).

4. A tunnel drainage hole segmented flow measurement device according to claim 3, characterized in that: The second water inlet channel (21) is in the shape of a hollow ring and is sleeved on the outside of the first conveying channel (12); a water inlet hole is provided on the outside of the second water inlet channel (21), and water can flow into the second water inlet channel (21) through the water inlet hole; The second delivery channel (22) is an annular pipe with a hollow interior. The second delivery channel (22) is sleeved on the outside of the first delivery channel (12). The interior space of the second delivery channel (22) is connected to the interior space of the second water inlet channel (21). Water in the second water inlet channel (21) can flow to the second flow meter (23) through the second delivery channel (22).

5. A tunnel drainage hole segmented flow measurement device according to claim 4, characterized in that: The outer shell (10) is an annular pipe which is hollow inside and open at both ends. The annular channel inside the outer shell (10) is used to balance the water pressure, thereby preventing the water pressure inside the tunnel drainage hole from increasing after the blocking device blocks the tunnel drainage hole. The first water inlet channel (11) and the first conveying channel (12) are sleeved on the outside of the outer shell (10); support frames (32) are respectively arranged between the first water inlet channel (11) and the outer shell (10), between the first conveying channel (12) and the outer shell (10), and between the second conveying channel (22) and the first conveying channel (12); and a gap is arranged on the support frame (32) and penetrates the support frame (32), and water can flow through the gap.

6. The tunnel drainage hole segmented flow measurement device according to claim 1, characterized in that: A plurality of filter baffles (33) are arranged outside the first water inlet channel (11) and / or the second water inlet channel (21); the plurality of filter baffles (33) are evenly arranged in a direction surrounding the first water inlet channel (11) and / or the second water inlet channel (21); there is a gap between the filter baffles (33) and adjacent filter baffles (33), and water can flow through the gap; the plurality of filter baffles (33) are used to prevent large-volume impurities in the water flow from entering the first water inlet channel (11) and / or the second water inlet channel (21).

7. A tunnel drainage hole segmented flow measurement device according to claim 6, characterized in that: The flow measurement device comprises three airbags, namely a first airbag (41), a second airbag (42) and a third airbag (43); the first airbag (41), the second airbag (42) and the third airbag (43) are arranged along the axis of the housing (10); The first water inlet channel (11) is arranged between the first airbag (41) and the second airbag (42), and the second water inlet channel (21) is arranged between the second airbag (42) and the third airbag (43); An airbag guide plate (44) is provided on one side of the airbag close to the outer shell (10), and the airbag guide plate (44) is used to limit the position of the airbag and control the airbag to expand in a direction close to the inner wall of the tunnel drainage hole after being inflated.

8. The tunnel drainage hole segmented flow measurement device according to claim 1, characterized in that: The housing (10) is provided with a first annular connector (51) and a second annular connector (52), and the first annular connector (51) and the second annular connector (52) are respectively provided with an input pipe (53) and an output pipe (54); The input pipe (53) of the first annular connector (51) is connected to the first delivery channel (12), and the output pipe (54) of the first annular connector (51) is connected to the first flow meter; the input pipe (53) of the second annular connector (52) is connected to the second delivery channel (22), and the output pipe (54) of the second annular connector (52) is connected to the second flow meter (23); the first annular connector (51) and the second annular connector (52) are used to gather water flows of the first delivery channel (12) and the second delivery channel (22), respectively, and deliver the water flows to the first flow meter and the second flow meter (23); A filter screen (55) is provided at the connection portion between the first delivery channel (12) and the input pipe (53) of the first annular connector (51), and the filter screen (55) is used to filter small-volume impurities.

9. The tunnel drainage hole segmented flow measurement device according to claim 1, characterized in that: The driver (63) is a double-acting hydraulic cylinder, the piston of the double-acting hydraulic cylinder is connected to the channel plug via a connecting rod, and liquid inlets are respectively provided on both sides of the double-acting hydraulic cylinder piston, which are respectively used to control the opening and closing of the channel plug; The end of the housing (10) is provided with an external thread, which can be connected to an extension rod provided with a matching internal thread, and is used to increase the length of the flow measurement device, so that the first water inlet channel (11) can be moved to a position in the tunnel drainage hole where water flow needs to be measured.

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