Patrol collection device and collection method

Abstract

The invention discloses an inspection collection device and method, and belongs to the technical field of coal mine underground gas collection and detection.The inspection collection device comprises a gas path connector, a device body and a detection gas outlet pipe group, the gas path connector is arranged at the top of the device body, and the device body comprises an adapter plate, a gas production pipe, a first conduction pipe, a driving shaft and a driving device; the adapter plate is arranged at the top of the device main body; the gas production pipe, the first conduction pipe, the driving shaft and the driving device are arranged in the device main body; the power output end of the driving device is fixedly connected with one end of the driving shaft, the first conduction pipe is coaxially fixed to the driving shaft, and the gas production pipe is connected with the first conduction pipe in a conduction mode; one end of the detection gas outlet pipe group is hermetically communicated with the first communication pipe, and the other end of the detection gas outlet pipe group is exposed out of the device main body; one end of the gas path interface is communicated with a to-be-detected drill hole pumping pipe, and the other end of the gas path interface is communicated with the adapter plate; according to the invention, circulating conduction between each drilling gas and the gas multi-parameter detection instrument is realized, the sealing performance is good, and the operation resistance is small.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas collection and detection in coal mines, and specifically relates to an inspection and collection device and a collection method. Background Art

[0002] Coal seam gas borehole drainage is the main means of mine gas drainage. Since there are thousands of drainage boreholes, dozens of inspection workers are often required to inspect the gas drainage parameters of the boreholes. There are problems such as low collection frequency and high labor intensity with the manual inspection method. If mine explosion-proof multi-parameter sensors or electric control valves are installed in each drainage borehole, there are problems such as a huge number of sensors or electric control valves, difficult installation, commissioning and maintenance, complicated supporting power supply and communication systems, high cost, high risk of explosion, and inability to be widely promoted and used in coal mines.

[0003] In addition, for the detection of environmental gas at thousands of fixed points in coal mines, at present, it is also carried out by manual fixed-point inspection. Each point often needs to be inspected several times a day, and generally dozens of inspection workers are required, and the above similar problems also exist.

[0004] To solve the above problems, there is an urgent need for an inspection and collection device and a collection method that can realize the inspection and measurement of multi-channel gas parameters through a set of gas multi-parameter detection instruments, and has a simple structure, good sealing performance, simple control system, and is suitable for wide promotion and use. Summary of the Invention

[0005] The present invention aims at the above problems, makes up for the deficiencies of the prior art, and provides an inspection and collection device and a collection method.

[0006] To achieve the above object, the present invention adopts the following technical solutions.

[0007] An inspection and collection device provided by the present invention includes: a gas path interface, a device main body, and a detection outlet gas pipe group. The gas path interface is arranged on the upper surface of the top of the device main body. The device main body includes: a transfer board, a gas collection pipe, a first conduction pipe, a drive shaft, and a drive device. The transfer board is arranged on the top of the device main body, and the gas collection pipe, the first conduction pipe, the drive shaft, and the drive device are arranged in the device main body; the power output end of the drive device is fixedly connected to one end of the drive shaft, the first conduction pipe is coaxially fixed on the drive shaft, and the gas collection pipe is conductively connected to the first conduction pipe; one end of the detection outlet gas pipe group is fixed on the device main body and is hermetically conductively connected to the first conduction pipe, and the other end of the detection outlet gas pipe group is exposed outside the device main body; one end of the gas path interface is communicated with the extraction pipe of the borehole to be inspected or is conductively connected to the area to be inspected, and the other end of the gas path interface is conductively connected to the transfer board; the drive device drives the drive shaft and the first conduction pipe to rotate, and further drives the gas collection pipe to rotate.

[0008] As a preferred embodiment of the present invention, the gas collecting pipe includes: a transfer pipe section and a docking pipe. The transfer pipe section is conductively connected to the docking pipe. The other port of the docking pipe is hermetically connected to the surface of the transfer plate and can slide along the surface of the transfer plate, and is hermetically conductively connected to each gas path interface through the transfer plate in a time-sharing manner.

[0009] As another preferred embodiment of the present invention, the docking pipe further includes: a telescopic pipe section. The telescopic pipe section can slide hermetically along the outer wall of the docking pipe, and a sealing ring is provided on the telescopic pipe section.

[0010] As another preferred embodiment of the present invention, a sealing surface is provided on the sealing ring, and magnets and opposite-pole magnets are distributed on the sealing surface; corresponding to the magnets and opposite-pole magnets on the sealing surface on the transfer plate, embedded magnets and opposite-pole embedded magnets are distributed; wherein, the magnet and the embedded magnet are magnets with opposite magnetic polarities, and the opposite-pole magnet and the opposite-pole embedded magnet are magnets with opposite magnetic polarities.

[0011] As another preferred embodiment of the present invention, the inspection and collection device further includes a pushing mechanism. The pushing mechanism includes: a second push rod and a gas supply pipe. The driving shaft is a hollow shaft body with sealed ends at both ports. The fixed end of the second push rod is fixed to the docking pipe, the other end of the second push rod is fixed to the telescopic pipe section, the air inlet of the second push rod is connected to the gas supply pipe, the gas supply pipe is connected to the driving shaft, and a gas supply interface is provided on the top side of the driving shaft; the air inlet of the second push rod is communicated with the gas source through the gas supply pipe, the driving shaft, and the gas supply interface in sequence.

[0012] As another preferred embodiment of the present invention, a partition is further provided on the device main body. The partition divides the device main body into two sealed cavities, upper and lower. The gas collecting pipe and the first conduction pipe are arranged in the cavity above the partition, and the driving device and the detection air outlet pipe group are arranged in the cavity below the partition. The driving shaft penetrates through the partition.

[0013] As another preferred embodiment of the present invention, the detection air outlet pipe group includes: a detection connection pipe, a second conduction pipe, and a bearing. The second conduction pipe is coaxially conductively connected to the first conduction pipe. The lower port of the second conduction pipe is hermetically fixed to the driving shaft and does not rotate with the driving shaft. The first conduction pipe can rotate relative to the second conduction pipe; the detection connection pipe is conductively connected to the second conduction pipe and is exposed outside the device main body; the first conduction pipe is connected to the partition and can rotate relative to it, the second conduction pipe is fixed to the partition, and the bearing is arranged below the second conduction pipe and is connected to the driving shaft above the driving device.

[0014] As another preferred embodiment of the present invention, the driving device includes: a ratchet positioning mechanism, a first push rod, and a push rod fixing frame. The push rod fixing frame is fixedly erected in the device main body. One end of the first push rod is hinged to the push rod fixing frame. The ratchet positioning mechanism includes: a ratchet and a ratchet driving and positioning component that are cooperatively connected. The other end of the first push rod is hinged to the ratchet driving and positioning component.

[0015] As another preferred embodiment of the present invention, the inspection and collection device also includes a collecting exhaust pipe, which is sealed and connected to the cavity above the partition. The gas collected by each gas path interface flows to the collecting exhaust pipe through the cavity above the partition, and is discharged to a designated position through the collecting exhaust pipe.

[0016] In addition, the present invention also provides a patrol inspection and collection method, which is implemented using the patrol inspection and collection device, including: driving the gas collection pipe to rotate and position through a remote control driving device, enabling the port of the docking pipe to slide along the surface of the adapter plate, and stop at the position of each gas path interface in turn or at a certain gas path interface according to instructions; achieving sealing and connection between the docking pipe and the gas path interface through the adapter plate, and the gas is collected and detected along the gas path interface, the gas collection pipe, the first conducting pipe, the detection gas pipe group to the gas multi-parameter detection instrument, to achieve the collection and detection of the gas in the gas path connected to each gas path interface.

[0017] As another preferred embodiment of the present invention, the axial compression and sealing between the telescopic pipe section and the adapter plate at the position of the gas path interface is achieved through the attraction and repulsion characteristics of the magnet, the opposite-sex magnet and the embedded magnet, and the opposite-sex embedded magnet; during the rotation process, the telescopic pipe section and the adapter plate are in a non-attractive compression or repulsion state;

[0018] As another preferred embodiment of the present invention, the second push rod is remotely controlled to extend at the position of the gas path interface to be tested, thereby driving the telescopic pipe section and the adapter plate to be axially compressed and sealed; after the test is completed, the second push rod is controlled to be retracted, thereby driving the telescopic pipe section to separate from the adapter plate.

[0019] Beneficial effects of the present invention:

[0020] The present invention provides a patrol collection device and collection method, which realizes the circulation connection between each borehole gas and the gas multi-parameter detection instrument through the structural design of the device body mainly composed of the adapter plate, the gas collection pipe, the first conduction pipe, the drive shaft, and the drive device, and the gas path interface and the detection gas outlet pipe group, and well solves the problems existing in the prior art. The present invention has a simple structure, good sealing, small running resistance, and simple control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a patrol inspection and collection device.

[0023] Figure 2 Schematic diagram of the internal structure of an inspection and acquisition device according to the present invention.

[0024] Figure 3 Schematic diagram of the structure of the gas sampling pipe of an inspection and acquisition device according to the present invention.

[0025] Figure 4 Schematic diagram of the structure of the adapter board of an inspection and acquisition device according to the present invention.

[0026] Figure 5 Schematic diagram of the structure of the layout of magnets and opposite-sex magnets on the sealing ring of an inspection and acquisition device according to the present invention.

[0027] Figure 6 Schematic diagram of the structure of the layout of embedded magnets and opposite-sex embedded magnets on the adapter board of an inspection and acquisition device according to the present invention.

[0028] Figure 7 Schematic diagram of the structure of the pushing mechanism of an inspection and acquisition device according to the present invention.

[0029] Figure 8 Schematic diagram of the structure of the driving device of an inspection and acquisition device according to the present invention.

[0030] Figure 9 Schematic diagram of the structure of the ratchet positioning mechanism of an inspection and acquisition device according to the present invention.

[0031] Markings in the figure: 1 gas path interface, 2 device main body, 3 detected gas outlet pipe group, 4 collecting exhaust pipe;

[0032] 201 adapter board, 2011 cavity, 2012 partition, 2013 embedded magnet, 2014 opposite-sex embedded magnet;

[0033] 202 gas sampling pipe, 2021 transition pipe section, 2022 docking pipe, 2023 telescopic pipe section, 2024 sealing ring;

[0034] 20241 sealing surface, 20242 magnet, 20243 opposite-sex magnet;

[0035] 203 first conduction pipe, 204 drive shaft, 205 drive device;

[0036] 2025 second push rod, 20251 gas supply pipe, 20252 gas supply interface;

[0037] 2051 ratchet positioning mechanism, 2052 first push rod, 2053 push rod fixing bracket;

[0038] 20511 ratchet, 20512 ratchet drive positioning component;

[0039] 301 detection connection pipe, 302 second conduction pipe, 303 bearing. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] like Figures 1 to 9 As shown, an inspection and collection device provided by an embodiment of the present invention comprises: a gas circuit interface 1, a device body 2, and a detection gas pipe group 3, wherein the gas circuit interface 1 is arranged on the top upper surface of the device body 2; the device body 2 comprises: an adapter plate 201, a gas sampling pipe 202, a first conducting pipe 203, a driving shaft 204, and a driving device 205, wherein the adapter plate 201 is arranged on the top of the device body 2, and the gas sampling pipe 202, the first conducting pipe 203, the driving shaft 204, and the driving device 205 are arranged in the device body 2; the upper end of the driving shaft 204 is connected to the adapter plate 201 and can rotate relatively, and the driving device 205 The power output end is fixedly connected to the lower end of the driving shaft 204, the first conducting tube 203 is coaxially fixed on the driving shaft 204, and the gas collection pipe 202 is connected to the first conducting tube 203; one end of the detection gas pipe group 3 is fixed on the device body 2 and is sealed and connected with the first conducting tube 203, and the other end of the detection gas pipe group 3 is exposed outside the device body 2; one end of the gas circuit interface 1 is connected to the extraction pipe of the borehole to be inspected or the area to be inspected, and the other end of the gas circuit interface 1 is connected to the adapter plate 201; the driving shaft 204 and the first conducting tube 203 are driven to rotate through the driving device 205, thereby driving the gas collection pipe 202 to rotate.

[0042] The gas production pipe 202 includes: an adapter tube section 2021 and a butt tube 2022. The adapter tube section 2021 is connected to the butt tube 2022. The other end of the butt tube 2022 is sealed and connected to the surface of the adapter plate 201 and can slide along the surface of the adapter plate 201. It is sealed and connected with each gas path interface 1 through the adapter plate 201 in a time-sharing manner.

[0043] The butt joint pipe 2022 further includes: a telescopic pipe section 2023 , which can slide sealingly along the outer wall of the butt joint pipe 2022 , and a sealing ring 2024 is provided on the telescopic pipe section 2023 .

[0044] A sealing surface 20241 is provided on the sealing ring 2024, and magnets 20242 and opposite-pole magnets 20243 are distributively arranged on the sealing surface 20241; corresponding to the magnets 20242 and opposite-pole magnets 20243 on the sealing surface 20241, embedded magnets 2013 and opposite-pole embedded magnets 2014 which are used in cooperation are distributively arranged on the adapter plate 201; among them, the magnet 20242 and the embedded magnet 2013 are magnets with opposite magnetic polarities, and the opposite-pole magnet 20243 and the opposite-pole embedded magnet 2014 are magnets with opposite magnetic polarities.

[0045] The inspection and acquisition device of the present invention further includes a pushing mechanism, and the pushing mechanism includes: a second push rod 2025, a gas supply pipe 20251. The driving shaft 204 is a hollow shaft body with sealed ports at both ends. The fixed end of the second push rod 2025 is fixed to the docking pipe 2022, the other end of the second push rod 2025 is fixed to the telescopic pipe section 2023. The air inlet of the second push rod 2025 is connected to the gas supply pipe 20251, the gas supply pipe 20251 is connected to the driving shaft 204, and an air supply interface 20252 is arranged on the top side of the driving shaft 204; the air inlet of the second push rod 2025 is communicated with the gas source through the gas supply pipe 20251, the driving shaft 204, and the air supply interface 20252 in sequence.

[0046] A partition plate 2012 is further arranged on the device main body 2. The partition plate 2012 divides the device main body 2 into two upper and lower sealed cavities 2011. A gas collecting pipe 202 and a first conduction pipe 203 are arranged in the cavity 2011 above the partition plate 2012, and a driving device 205 and a detection outlet pipe group 3 are arranged in the cavity 2011 below the partition plate 2012. The driving shaft 204 penetrates through the partition plate 2012.

[0047] The detection outlet pipe group 3 includes: a detection connection pipe 301, a second conduction pipe 302, and a bearing 303. The second conduction pipe 302 is coaxially conducted with the first conduction pipe 203. The lower port of the second conduction pipe 302 is hermetically fixed to the driving shaft 204, and the second conduction pipe 302 does not rotate with the driving shaft 204. The first conduction pipe 203 can rotate relative to the second conduction pipe 302; the detection connection pipe 301 is used to connect a gas multi-parameter detector. The detection connection pipe 301 is conductively connected to the second conduction pipe 302, and the detection connection pipe 301 is exposed outside the device main body 2; the first conduction pipe 203 is connected to the partition plate 2012 and can rotate relative to it, the second conduction pipe 302 is fixed to the partition plate 2012, and the bearing 303 is arranged below the second conduction pipe 302 and is connected to the driving shaft 204 above the driving device 205.

[0048] The driving device 205 includes: a ratchet positioning mechanism 2051, a first push rod 2052, and a push rod fixing frame 2053. The push rod fixing frame 2053 is fixed and upright in the device body 2. One end of the first push rod 2052 is hinged to the push rod fixing frame 2053. The ratchet positioning mechanism 2051 includes: a ratchet 20511 and a ratchet drive positioning assembly 20512 that are connected to each other. The other end of the first push rod 2052 is hinged to the ratchet drive positioning assembly 20512.

[0049] The inspection and collection device of the present invention also includes a collecting exhaust pipe 4, which is sealed and connected to the cavity 2011 above the partition 2012. The gas collected by each gas path interface 1 flows to the collecting exhaust pipe 4 through the cavity 2011 above the partition 2012, and is discharged to a designated position through the collecting exhaust pipe 4.

[0050] In addition, the present invention also provides a patrol inspection and collection method, which is implemented using the patrol inspection and collection device, including: driving the gas collection pipe 202 to rotate and position through the remote control driving device 205, so that the port of the docking pipe 2022 slides along the surface of the adapter plate 201, and stops at the position of each gas circuit interface 1 in turn or at a certain gas circuit interface 1 according to instructions; the adapter plate 201 is used to achieve sealing and connection between the docking pipe 2022 and the gas circuit interface 1, and the gas is collected and detected along the gas circuit interface 1, the gas collection pipe 202, the first conducting pipe 203, and the gas pipe group 3 to the gas multi-parameter detection instrument, so as to realize the collection and detection of the gas in the gas circuit connected to each gas circuit interface 1.

[0051] Specifically, through the attraction and repulsion characteristics of the magnet 20242, the opposite-sex magnet 20243 and the embedded magnet 2013, and the opposite-sex embedded magnet 2014, the axial compression and sealing between the telescopic tube section 2023 and the adapter plate 201 is achieved at the position of the air path interface 1; during the rotation process, the telescopic tube section 2023 and the adapter plate 201 are in a non-attractive compression or repulsive state to reduce the rotational resistance and reduce the wear on the sealing surface 20241.

[0052] Specifically, the second push rod 2025 is remotely controlled to be extended at the position of the gas circuit interface 1 to be tested, driving the telescopic tube section 2023 and the adapter plate 201 to be axially compressed and sealed; after the detection is completed, the second push rod 2025 is controlled to be retracted, driving the telescopic tube section 2023 to separate from the adapter plate 201, so as to reduce the rotational resistance and reduce the wear on the sealing surface 20241.

[0053] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A patrol inspection and collection device, characterized in that: include: An air circuit interface, a device body, and a detection air pipe group. The air circuit interface is arranged on the top upper surface of the device body. The device body includes: an adapter plate, a gas collection pipe, a first conductive pipe, a drive shaft, and a drive device. The adapter plate is arranged on the top of the device body. The gas collection pipe, the first conductive pipe, the drive shaft, and the drive device are arranged in the device body. The power output end of the drive device is fixedly connected to one end of the drive shaft, the first conductive pipe is coaxially fixed on the drive shaft, and the gas collection pipe is conductively connected to the first conductive pipe. One end of the detection air pipe group is fixed to the device body and sealed and conductively connected to the first conductive pipe, and the other end of the detection air pipe group is exposed outside the device body. One end of the air circuit interface is connected to the extraction pipe of the borehole to be inspected or the area to be inspected, and the other end of the air circuit interface is conductively connected to the adapter plate. The drive shaft and the first conductive pipe are driven to rotate by the driving device, thereby driving the gas collection pipe to rotate.

2. A patrol inspection and collection device according to claim 1, characterized in that: The gas collection pipe includes: a transfer pipe section and a butt pipe. The transfer pipe section is connected to the butt pipe in a conductive manner. The other end of the butt pipe is sealed and connected to the surface of the transfer plate and can slide along the surface of the transfer plate. It is sealed and connected with each gas path interface in a time-sharing manner through the transfer plate.

3. A patrol inspection and collection device according to claim 2, characterized in that: The butt joint pipe further comprises: a telescopic pipe section, which can slide sealingly along the outer wall of the butt joint pipe, and a sealing ring is arranged on the telescopic pipe section.

4. The inspection and collection device according to claim 3, characterized in that: The sealing ring is provided with a sealing surface, on which magnets and opposite-pole magnets are distributed; the adapter plate is correspondingly provided with embedded magnets and opposite-pole embedded magnets used in conjunction with the magnets and opposite-pole magnets on the sealing surface; wherein the magnet and the embedded magnet are magnets with opposite magnetic properties, and the opposite-pole magnet and the opposite-pole embedded magnet are magnets with opposite magnetic properties.

5. The inspection and collection device according to claim 3, characterized in that: The inspection and collection device also includes a pushing mechanism, which includes: a second push rod, an air supply pipe, the driving shaft is a hollow shaft body with two sealed ends, the fixed end of the second push rod is fixed to the docking tube, the other end of the second push rod is fixed to the telescopic pipe section, the air inlet of the second push rod is connected to the air supply pipe, the air supply pipe is connected to the driving shaft, and an air supply interface is provided on the top side of the driving shaft; the air inlet of the second push rod is connected to the air source through the air supply pipe, the driving shaft, and the air supply interface in sequence.

6. The inspection and collection device according to claim 1, characterized in that: A partition is also provided on the device body, which divides the device body into two sealed cavities, a gas collection pipe and a first conducting pipe are provided in the cavity above the partition, a driving device and a detection gas pipe group are provided in the cavity below the partition, and a driving shaft passes through the partition.

7. The inspection and collection device according to claim 6, characterized in that: The detection air outlet pipe group includes: a detection connecting pipe, a second conducting pipe, and a bearing. The second conducting pipe is coaxially connected to the first conducting pipe, the lower end of the second conducting pipe is sealed and fixed to the driving shaft, and the second conducting pipe does not rotate with the driving shaft, and the first conducting pipe can rotate relative to the second conducting pipe; the detection connecting pipe is connected to the second conducting pipe, and the detection connecting pipe is exposed outside the device body; the first conducting pipe is connected to the partition and can rotate relatively, the second conducting pipe is fixed to the partition, and the bearing is arranged below the second conducting pipe and connected to the driving shaft above the driving device.

8. A patrol inspection and collection device according to claim 1 or 6, characterized in that: The driving device includes: a ratchet positioning mechanism, a first push rod, and a push rod fixing frame. The push rod fixing frame is fixed and upright in the device body. One end of the first push rod is hinged to the push rod fixing frame. The ratchet positioning mechanism includes: a ratchet and a ratchet drive positioning assembly that are connected to each other. The other end of the first push rod is hinged to the ratchet drive positioning assembly.

9. The inspection and collection device according to claim 6, characterized in that: The inspection and collection device also includes a collecting exhaust pipe, which is sealed and connected to the cavity above the partition. The gas collected by each gas path interface flows to the collecting exhaust pipe through the cavity above the partition and is discharged to a designated position through the collecting exhaust pipe.

10. A patrol inspection and collection method, characterized in that: The inspection and collection device described in claim 4 is used to implement the method, including: driving the gas collection pipe to rotate and position through a remote-controlled driving device, sliding the docking pipe port along the surface of the adapter plate, and stopping at the position of each gas path interface in turn or at a certain gas path interface according to instructions; sealing and connecting the docking pipe and the gas path interface through the adapter plate, and the gas is collected and detected along the gas path interface, the gas collection pipe, the first conducting pipe, and the gas outlet pipe group to the gas multi-parameter detection instrument to realize the collection and detection of the gas connected to each gas path interface; axial compression and sealing between the telescopic pipe section and the adapter plate at the position of the gas path interface is realized through the attraction and repulsion characteristics of magnets, opposite-sex magnets and embedded magnets, and opposite-sex embedded magnets; during the rotation process, the telescopic pipe section and the adapter plate are in a non-attractive compression or repulsive state.

11. A patrol inspection and data collection method, characterized in that: The inspection and collection device described in claim 5 is used to implement the method, including: driving the gas collection pipe to rotate and position through a remote-controlled driving device, sliding the docking pipe port along the surface of the adapter plate, and stopping at the position of each gas path interface in turn or at a certain gas path interface according to instructions; sealing and communicating the docking pipe and the gas path interface through the adapter plate, and the gas flows along the gas path interface, the gas collection pipe, the first conducting pipe, the detection gas pipe group to the gas multi-parameter detection instrument, to realize the collection and detection of the gas connected to each gas path interface; remotely controlling the second push rod to extend at the position of the gas path interface to be tested, driving the telescopic pipe section and the adapter plate to be axially pressed and sealed; after the detection is completed, controlling the second push rod to be retracted, driving the telescopic pipe section to separate from the adapter plate.

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