In-well multi-point gas detection device and in-well multi-point gas detection method

Abstract

The embodiment of the invention relates to the technical field of engineering detection, and discloses an in-well multi-point gas detection device and an in-well multi-point gas detection method. The in-well multi-point gas detection device comprises a gas detector, a deflation brake and a plurality of ventilation hoses, the plurality of ventilation hoses are connected with the deflation brake, and the deflation brake is used for controlling opening or closing of a gas passage between the plurality of ventilation hoses and the gas detector; the deflation brake is connected with the gas detector; the ventilation hoses are different in length. According to the in-well multi-point gas detection device and the in-well multi-point gas detection method provided by the invention, whether toxic and harmful gas exists at a plurality of detection points in a manhole can be measured by adjusting the device once, and the detection efficiency and the position precision are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of engineering detection technology, and in particular to a multi-point gas detection device and a multi-point gas detection method in a well. Background Art

[0002] In engineering construction projects, especially those involving the relocation of communication pipelines, in order to facilitate power maintenance and threading, a vertical passage for people to go down will be dug at certain intervals to facilitate the construction personnel to go down to the well for construction work, that is, the manhole. Because the manhole is in a closed state for a long time, the air composition in the well is inconsistent with the composition in the atmosphere and may contain toxic and harmful gases. Therefore, before the construction personnel go down to the well, they must first open the manhole cover for ventilation and use toxic and harmful gas detection devices to detect that the air in the well meets the standards for going down to the well before they can go down to the well. Before going down to the well, the gas at different positions in the well should be inspected at multiple points.

[0003] However, the inventors found that the toxic and harmful gas detection device in the related art can only detect the gas at one detection point at a time. When detecting different detection points, engineers need to manually adjust the length of the ventilation hose of the device to the position of the next detection point for further detection. However, each time the length of the ventilation hose is adjusted, the detection process becomes cumbersome and the detection efficiency is reduced; and when adjusting the length, length errors are easily generated, resulting in the position of the measured detection point not being consistent with the position to be detected. Therefore, there is a need for a multi-point gas detection device and a multi-point gas detection method in a well that can improve the detection efficiency and detection position accuracy. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a multi-point gas detection device and a multi-point gas detection method in a well, so that the device can be adjusted once to measure whether there are toxic and harmful gases at multiple detection points in the well, thereby improving detection efficiency and position accuracy.

[0005] In order to solve the above-mentioned technical problems, an embodiment of the present application provides a multi-point gas detection device in a well, comprising: a gas detector, a vent valve and a plurality of ventilation hoses; the plurality of ventilation hoses are connected to the vent valve, and the vent valve is used to control the opening or closing of the gas passage between the plurality of ventilation hoses and the gas detector; the vent valve is connected to the gas detector; the plurality of ventilation hoses have different lengths.

[0006] An embodiment of the present application further provides a method for multi-point gas detection in a well, comprising: performing gas detection on a communication pipeline entering the well by using the multi-point gas detection device in the well as described above.

[0007] Compared with the prior art, the implementation manner of the present application realizes the opening and closing of the gas passage through an air release gate connected to the gas detector, and connects multiple ventilation hoses to the air release gate, and controls the air release of the multiple ventilation hoses through the air release gate, so as to directly test whether the gases at multiple detection points at different heights in the manhole are toxic and harmful in one test, without adjusting the length of the ventilation hose. By realizing multi-point detection through one adjustment, the efficiency of gas detection in the manhole is improved; at the same time, due to the different lengths of the ventilation hoses, that is, different ventilation hoses have different heights of detection positions for detecting the manhole, the lengths of different ventilation hoses can be set according to needs, and there is no need to adjust the length of the ventilation hose after testing the gas at one detection point, which improves the accuracy of the detection point during detection, thereby improving the efficiency of detecting toxic and harmful gases in the manhole while improving the accuracy of the detection position.

[0008] In addition, the deflation gate includes a control motor, a baffle, a deflation gate air inlet and a deflation gate air outlet; the number of branches of the deflation gate air inlet is the same as the number of the multiple ventilation hoses, and each branch is connected to a ventilation hose; the baffle is located between the branch of the deflation gate air inlet and the deflation gate air outlet; the deflation gate air outlet is connected to the gas detector; the control motor is connected to the baffle to control the movement of the baffle. The implementation method of the present application sets the number of deflation gate branches to be consistent with the number of ventilation hoses, thereby achieving a one-to-one correspondence between the ventilation hoses and the deflation gate branches, and realizes the opening or closing of multiple branches through the baffle that can be controlled by the motor to move, thereby realizing the detection of gas in multiple ventilation hoses at one time, thereby improving the efficiency of gas detection.

[0009] In addition, the widths of the branches are all equal; the baffles include a left baffle and a right baffle, and the control motor is connected to the left baffle and the right baffle respectively; the distance between the left baffle and the right baffle is equal to the width of the branch. In the embodiment of the present application, the distance between the left and right baffles is set to the width of a branch, so that one branch is controlled at a time to connect the ventilation hose and the gas detector to form a gas passage, thereby avoiding gas mixing caused by connecting multiple ventilation hoses to the air release valve, thereby improving the accuracy of the detection results of multi-point detection.

[0010] In addition, when the control motor controls the baffle to move, it also controls the left baffle and the right baffle to move in the same direction; the maximum distance that the baffle moves in the same direction is twice the width of the branch; when the baffle moves to the maximum distance in the same direction, the control motor switches the motor direction to the reverse direction. The embodiment of the present application controls the left and right baffles to move in the same direction at the same time, thereby ensuring that the spacing distance between the left baffle and the right baffle is always consistent and equal to the width of the branch, so as to maintain a gas passage that can form a branch at a time; and limiting the maximum distance that the baffle moves in the same direction to be twice the width of the branch can limit the moving distance of the baffle, thereby preventing the baffle from moving out of the interior of the deflation valve, causing the deflation valve to leak, and reducing the impact of external gas on the accuracy of gas detection.

[0011] In addition, the baffle is a metal baffle; the branch wall of the air inlet branch of the air release lock is wound with a metal coil, and the metal coil is connected to a power supply; after the control motor controls the baffle to move, the metal coil is energized by the power supply, and the baffle is adsorbed by the magnetic force generated by the energization to close the gas path that does not need to be detected. The implementation method of the present application is to wind a metal coil connected to the power supply around the branch, so that the magnetic force generated by the energization can adsorb the metal baffle, thereby closing the branch that does not need to be detected, and only opening the branch that needs to be detected, thereby forming a gas path for detection, and the metal baffle is adsorbed and closed by electromagnetic force to close the gas path that does not need to be detected, which is conducive to reducing the gas mixing caused by other paths being connected to the air release lock, so that the accuracy of the gas detection result is more accurate.

[0012] In addition, the outermost layer of the baffle is an insulating layer. Since the present application uses the magnetic force generated by power-on to adsorb the metal baffle so that the branch is closed, in order to prevent the metal baffle from being difficult to move after being adsorbed and the metal baffle from damaging the control motor when power is turned on, the present embodiment of the application adds an insulating layer to the outermost layer of the metal baffle, so that the metal baffle can still move normally after being adsorbed by the electromagnetic force, and avoids electrical damage to the control motor caused by power-on of the metal baffle.

[0013] In addition, the width of the branch is equal to the width of the air outlet of the air release lock. In the embodiment of the present application, by setting the width of the branch to be equal to the width of the air outlet of the air release lock, the width of the air outlet of the air release lock leading to the gas detector is the same as the width of the branch of the air release lock, so that the pressure of the inlet and outlet gases is equal, avoiding the pressure difference from causing damage to the detection instrument.

[0014] In addition, the device also includes a detection result recording module; the detection result recording module includes a data group recording submodule and a result recording submodule; wherein the data group recording submodule is connected to the control motor and calculates the branch currently measured according to the number of forward and reverse rotations of the control motor; the result recording submodule is connected to the gas detector and records the gas detection result. The implementation method of the present application calculates the branch currently measured according to the number of forward and reverse rotations of the control motor through the detection result recording module and records the corresponding gas detection result, thereby realizing accurate recording of multiple groups of data for multi-point detection. In the case of performing multi-point detection at one time, there is no need to manually record the detected branches and corresponding detection results, which saves the cost of human labor and improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the multi-point gas detection device provided in an embodiment of the present application;

[0017] Figure 2 It is a schematic diagram of the position of the baffle when the air release valve of the device provided in the embodiment of the present application detects the rightmost branch;

[0018] Figure 3 It is a schematic diagram of the position of the baffle when the air release valve of the device provided in the embodiment of the present application detects the intermediate branch;

[0019] Figure 4 It is a schematic diagram of the position of the baffle when the air release valve of the device provided in the embodiment of the present application detects the rightmost branch;

[0020] Figure 5 It is a flow chart of the multi-point gas detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0022] The first embodiment of the present invention relates to a multi-point gas detection device in a well, which can be applied to engineering projects for the relocation of communication pipelines. The core of this embodiment is that the multi-point gas detection device in the well includes a gas detector, a venting gate and a plurality of ventilation hoses; the plurality of ventilation hoses are connected to the venting gate, and the venting gate is used to control the opening or closing of the gas passage between the plurality of ventilation hoses and the gas detector; the venting gate is connected to the gas detector; the plurality of ventilation hoses have different lengths, and the opening and closing of the gas passage are achieved by the venting gate connected to the gas detector, and the plurality of ventilation hoses are connected to the venting gate, and the venting of the plurality of ventilation hoses is controlled by the venting gate, so as to directly test the human in one test. Whether the gas at multiple detection points at different heights in the well is toxic or harmful, there is no need to adjust the length of the ventilation hose again. By realizing multi-point detection through one adjustment, the efficiency of gas detection in the well is improved; at the same time, due to the different lengths of the ventilation hoses, that is, different ventilation hoses have different heights of detection positions for detection of the well, the lengths of different ventilation hoses can be set according to needs, and there is no need to adjust the length of the ventilation hose after testing the gas at one detection point, which improves the accuracy of the detection point during detection, thereby improving the efficiency of detecting toxic and harmful gases in the well while improving the accuracy of the detection position. The following is a specific description of the implementation details of a multi-point gas detection device in a well of this embodiment. The following content is only the implementation details provided for the convenience of understanding and is not necessary for the implementation of this solution.

[0023] This embodiment relates to a multi-point gas detection device in a well, such as Figure 1 As shown, it specifically includes the following structures: a gas detector, a deflation valve and multiple ventilation hoses; the multiple ventilation hoses are connected to the deflation valve, and the deflation valve is used to control the opening or closing of the gas passage between the multiple ventilation hoses and the gas detector; the deflation valve is connected to the gas detector; the multiple ventilation hoses have different lengths.

[0024] In some example implementations, the width of the branch is equal to the width of the air release lock outlet. In the implementation of the present application, by setting the width of the branch to be equal to the width of the air release lock outlet, the width of the air release lock outlet leading to the gas detector is the same as the width of the branch of the air release lock, so that the pressure of the inlet and outlet gases is equal, avoiding the pressure difference from causing damage to the detection instrument.

[0025] In some example implementations, the device further includes a detection result recording module; the detection result recording module includes a data group recording submodule and a result recording submodule; wherein the data group recording submodule is connected to the control motor and calculates the branch currently measured according to the number of forward and reverse rotations of the control click; the result recording submodule is connected to the gas detector and records the gas detection result. The implementation method of the present application uses the detection result recording module to calculate the branch currently measured according to the number of forward and reverse rotations of the control motor and record the corresponding gas detection result, thereby achieving accurate recording of multiple groups of data for multi-point detection. In the case of performing multi-point detection at one time, there is no need to manually record the detected branches and corresponding detection results, which saves the cost of human labor and improves detection efficiency.

[0026] In some example implementations, the deflation gate includes a control motor, a baffle, a deflation gate air inlet, and a deflation gate air outlet; the number of branches of the deflation gate air inlet is the same as the number of the multiple ventilation hoses, and each branch is connected to a ventilation hose; the baffle is located between the branch of the deflation gate air inlet and the deflation gate air outlet; the deflation gate air outlet is connected to the gas detector; the control motor is connected to the baffle to control the movement of the baffle. The implementation method of the present application sets the number of deflation gate branches to be consistent with the number of ventilation hoses, thereby achieving a one-to-one correspondence between the ventilation hoses and the deflation gate branches, and realizes the opening or closing of multiple branches through the baffle that can be controlled by the motor to move, thereby realizing the detection of gas in multiple ventilation hoses at one time, thereby improving the efficiency of gas detection.

[0027] In some example implementations, the number of the ventilation hoses is 3, and the number of the branches is also 3. It should be noted that the number of ventilation hoses and branches can be flexibly adjusted according to actual engineering or operation requirements, and is not limited here.

[0028] In some example implementations, the air outlet of the purge lock is connected to the air inlet of the gas detector.

[0029] In some example implementations, the control motor is any one of a DC motor, a servo motor or a stepper motor. It should be noted that the type of control motor can be set accordingly according to actual engineering or operation requirements, and only needs to realize the bidirectional movement of the baffle, and this application does not limit it here.

[0030] In some example implementations, the widths of the branches are all equal; the baffles include a left baffle and a right baffle, the control motor is connected to the left baffle and the right baffle respectively; the distance between the left baffle and the right baffle is equal to the width of the branch. In the implementation of the present application, by setting the distance between the left and right baffles to the width of a branch, one branch is controlled at a time to connect the ventilation hose and the gas detector to form a gas passage, thereby avoiding gas mixing caused by connecting multiple ventilation hoses to the air release valve, thereby improving the accuracy of the detection results of multi-point detection.

[0031] In some example implementations, the width of the branch is equal to the diameter of the ventilation hose. In actual engineering or operations, the diameter of the ventilation hose or the branch width can be set to a range of 5mm to 10mm. Specifically, the diameter of the ventilation hose or the branch width can be set to 6mm. It should be noted that the range of the diameter of the ventilation hose or the branch width can be set accordingly according to the actual engineering or operation requirements. It is only necessary to keep the width of the branch equal to the diameter of the ventilation hose, and this application is not limited here.

[0032] In some example implementations, the width of the branch is equal to the width of the air outlet of the air release lock, and the width of the air outlet of the air release lock is equal to the width of the air inlet of the gas detector. The embodiment of the present application sets the width of the branch to be equal to the width of the air outlet of the air release lock, and sets the width of the air outlet of the air release lock to be equal to the width of the air inlet of the gas detector, and the width of the air inlet of the gas detector is the same as the width of the branch of the air release lock, so that the pressure of the inlet and outlet gases is equal, thereby avoiding damage to the detection instrument caused by the pressure difference.

[0033] In some example implementations, when the control motor controls the baffle to move, the left baffle and the right baffle are simultaneously controlled to move in the same direction; the maximum distance that the baffle moves in the same direction is twice the width of the branch; when the baffle moves to the maximum distance in the same direction, the control motor switches the motor direction to the reverse direction. The implementation method of the present application controls the left and right baffles to move in the same direction at the same time, thereby ensuring that the spacing distance between the left baffle and the right baffle is always consistent and equal to the width of the branch, so as to maintain a gas passage that can form a branch at a time; and limiting the maximum distance that the baffle moves in the same direction to be twice the width of the branch can limit the moving distance of the baffle, prevent the baffle from moving out of the interior of the deflation valve, causing the deflation valve to leak, and reduce the impact of external gas on the accuracy of gas detection.

[0034] In some example implementations, the movement of the left baffle and the right baffle is achieved through one or two control motors. When the number of control motors is one, the left and right baffles are moved in the same direction at the same time by the same control motor; when the number of control motors is two, the left baffle can be connected to the first control motor, and the right baffle can be connected to the second control motor; the first control motor and the second control motor simultaneously control the left baffle and the right baffle to move in the same direction at the same time. The type of the first control motor and the second control motor is any one of a DC motor, a servo motor or a stepper motor, and the type of the first control motor and the second control motor is the same. It should be noted that the type of control motor can be set accordingly according to the actual engineering or operation requirements, and it is only necessary to realize that the left and right baffles can synchronously maintain the movement in the same direction, and this application does not limit it here.

[0035] In some example implementations, the baffle is a metal baffle; the branch wall of the air inlet branch of the air release lock is wound with a metal coil, and the metal coil is connected to a power supply; after the control motor controls the baffle to move, the metal coil is energized by the power supply, and the baffle is adsorbed by the magnetic force generated by the energization, closing the gas path that does not need to be detected. The implementation method of the present application is to wind a metal coil connected to the power supply around the branch, so that the magnetic force generated by the energization can adsorb the metal baffle, so that the branch that does not need to be detected is closed, and only the branch that needs to be detected is opened, thereby forming a gas path for detection, and the metal baffle is adsorbed and closed by electromagnetic force. The gas path that does not need to be detected is helpful to reduce the gas mixing caused by other paths being connected to the air release lock, so that the accuracy of the gas detection result is more accurate. It should be noted that the power supply can be the power supply of the entire gas detection equipment, or an independent power supply can be set for the branch wall coil separately. The power supply method can be set accordingly according to the actual engineering or operation requirements, and the present application does not limit it here.

[0036] In some example implementations, the thickness of the branch wall and the outer wall of the air release lock is in the range of 10 mm to 15 mm. Specifically, the thickness of the branch wall and the outer wall of the air release lock is 15 mm. It should be noted that the thickness of the branch wall and the outer wall of the air release lock can be set accordingly according to actual engineering or operation requirements, and it is only necessary to maintain the branch wall and the outer wall of the air release lock with the bearing strength to form a gas passage, and this application does not make any restrictions here.

[0037] Specifically, taking a deflation gate with three branches, a branch width of 6mm and a branch wall of 15mm as an example, the lengths of the left baffle and the right baffle are both 57mm to 65mm. It should be noted that, since there will be errors in the control accuracy of the control motor, in order to avoid the movement of the baffle to generate gas from multiple branches or mix with the gas outside the deflation gate to affect the gas detection accuracy, under the premise of not affecting the detection and movement, the length of the baffle can be longer than the sum of the branch and the branch wall to be closed, and the length margin can be set according to the actual engineering or operation requirements, and there is no restriction here.

[0038] In some example implementations, the metal baffle may be made of ferromagnetic materials such as iron, cobalt, and nickel. It should be noted that the material of the metal baffle may be adjusted accordingly according to actual engineering or operational requirements. It is only necessary to ensure that the metal baffle can be adsorbed to the branch under the action of the electromagnetic field to achieve the closure of the air path. This application does not impose any restrictions here.

[0039] In some example implementations, the outermost layer of the baffle is an insulating layer. Since the present application uses the magnetic force generated by power-on to adsorb the metal baffle so that the branch is closed, in order to prevent the metal baffle from being difficult to move after being adsorbed and the metal baffle from damaging the control motor when powered on, the present embodiment of the application adds an insulating layer to the outermost layer of the metal baffle, so that the metal baffle can still move normally after being adsorbed by the electromagnetic force, and avoids electrical damage to the control motor caused by the power-on of the metal baffle.

[0040] In some example implementations, the insulating layer of the baffle is on the side close to the air inlet of the deflation lock. If it is necessary to save the material cost of the deflation lock baffle in actual production needs, the baffle can be made into a baffle with an insulating layer on only one side. When assembling the deflation lock, the side with the insulating layer needs to face the side with the branch, that is, the side of the air inlet of the deflation lock, as the insulating side with the branch. It should be noted that the insulating layer of the baffle can be bonded to the metal sheet using an insulating material of the same length, or the metal sheet can be coated with an insulating material film to achieve or other ways of forming an insulating layer to make a baffle with an insulating layer. In addition, the material of the insulating layer can be plastic or rubber, etc., and the material of the insulating layer can be adjusted accordingly according to the actual engineering or operation requirements. It is only necessary to keep the outermost layer of the baffle insulated, and this application is not limited here.

[0041] Specifically, take the process of the baffles of the three branch air release valves moving from right to left as an example. Figure 2 As shown, initially the rightmost branch is used as the passage, and the left baffle and the right baffle are both at the rightmost maximum position.

[0042] When detecting the gas in the rightmost branch, the metal coils wrapped around the branch walls of all branches are energized, and the left and right baffles are adsorbed and vertically attached to the branch walls, so that the leftmost branch and the middle branch are closed, and the rightmost branch and the gas detector form a gas passage for gas detection.

[0043] After the detection point corresponding to the ventilation hose connected to the rightmost branch is detected and recorded, the metal coil wrapped on the branch wall stops being energized, the left baffle and the right baffle are no longer adsorbed and attached to the branch wall, and the control motor controls the left baffle and the right baffle to move synchronously to the left. The moving distance is the sum of the width of a branch and the thickness of a branch wall, and moves to the middle branch for gas detection. Figure 3 Baffle position shown.

[0044] When detecting the gas in the middle branch, the metal coils wrapped on the branch walls of all branches are energized, and the left and right baffles are adsorbed and vertically attached to the branch walls, so that the leftmost branch and the rightmost branch are closed, and the middle branch and the gas detector form a gas passage for gas detection.

[0045] After the detection points corresponding to the ventilation hose connected to the middle branch are detected and recorded, the metal coil wrapped on the branch wall stops being energized, the left baffle and the right baffle are no longer adsorbed and attached to the branch wall, and the control motor controls the left baffle and the right baffle to move to the left synchronously. The moving distance is the sum of the width of a branch and the thickness of a branch wall. Move to the position of the maximum movement limit on the left side of the left baffle and the right baffle, that is, the leftmost branch, to perform gas detection, such as Figure 4 Baffle position shown.

[0046] When detecting the gas in the leftmost branch, the metal coils wrapped around the branch walls of all branches are energized, and the left and right baffles are adsorbed and vertically attached to the branch walls, so that the middle branch and the rightmost branch are closed, and the leftmost branch and the gas detector form a gas passage for gas detection.

[0047] After detecting and recording the detection point corresponding to the ventilation hose connected to the leftmost branch, since the left and right baffles have been moved to the leftmost maximum position, when the baffles are moved again, the motor is controlled to reverse and the left and right baffles start to move to the right. Figure 3 Similarly, the method and process of moving rightward and moving leftward are similar, only the direction is different, which will not be described here.

[0048] It should be noted that in the example implementation of this application, the limiters "left" and "right" are limiters of relative position, which are only used for understanding and explanation with the drawings here. Those skilled in the art should know that in actual production applications, the direction of the baffle can be adjusted accordingly according to the actual engineering or operation requirements, and no limitation is made here. In addition, the movement direction and sequence of the left baffle and the right baffle can also be manually controlled by connecting the control program, and the detection is performed in the order required according to the actual engineering or operation requirements, and no limitation is made here.

[0049] In some example implementations, the length differences of the multiple ventilation hoses are equal. The ratio of the length difference between the ventilation hoses to the total length of the manhole is in the range of 1:3 to 1:5. It should be noted that the length of the ventilation hose can be flexibly adjusted according to actual engineering or operation requirements, and the ratio range of the length difference between the ventilation hoses to the total length of the manhole can also be adjusted according to actual engineering or operation requirements, and this application does not limit it here.

[0050] In some example implementations, the depth of the manhole is 2m, and the length difference between the ventilation hoses is 0.5m. It should be noted that due to different requirements of various projects or operations, the depth of the manhole can be adjusted accordingly according to the actual project or operation requirements, and the length difference between the ventilation hoses can also be adjusted according to the actual project or operation requirements, and this application does not limit this.

[0051] In some example implementations, the lengths of multiple ventilation hoses may be gradually increased or gradually shortened according to the measurement order, or the required lengths may be set according to actual engineering or operation requirements. Taking three ventilation hoses as an example, among the three ventilation hoses, the length of the first ventilation hose may be 0.5m, the length of the second ventilation hose may be 1.0m, and the length of the third ventilation hose may be 1.5m; the length of the first ventilation hose may be 1.5m, the length of the second ventilation hose may be 1.0m, and the length of the third ventilation hose may be 0.5m; the length of the first ventilation hose may be 1.5m, the length of the second ventilation hose may be 0.5m, and the length of the third ventilation hose may be 1.0m; the length of the first ventilation hose may be 1.8m, the length of the second ventilation hose may be 1.6m, and the length of the third ventilation hose may be 0.3m. Those skilled in the art will appreciate that the lengths of the ventilation hoses here are only used as examples for understanding and explanation, and this application does not limit the specific lengths of the ventilation hoses.

[0052] In the embodiment of the present application, the opening and closing of the gas passage is achieved by an air vent gate connected to the gas detector, and multiple ventilation hoses are connected to the air vent gate. The air vent gate is used to control the deflation of the multiple ventilation hoses, so that it is possible to directly test whether the gases at multiple detection points at different heights in the manhole are toxic and harmful in one test, without adjusting the length of the ventilation hose. By achieving multi-point detection with one adjustment, the efficiency of gas detection in the manhole is improved. At the same time, due to the different lengths of the ventilation hoses, that is, different ventilation hoses have different heights of detection positions for detecting the manhole, the lengths of different ventilation hoses can be set according to needs, and there is no need to adjust the length of the ventilation hose after testing the gas at one detection point, which improves the accuracy of the detection point during detection, thereby improving the efficiency of detecting toxic and harmful gases in the manhole while improving the accuracy of the detection position.

[0053] The embodiments of the present application relate to a method for multi-point gas detection in a well, such as Figure 5 As shown, it includes: performing gas detection on the communication pipeline entering the well through the above-mentioned multi-point gas detection device in the well.

[0054] In some example implementations, the method includes: placing the plurality of ventilation hoses into the manhole; activating the air release valve to control the gas in the ventilation hoses to be input into the gas detector for detection.

[0055] The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0056] It is not difficult to find that this embodiment is a method embodiment corresponding to the above method embodiment and the device, and this embodiment can be implemented in conjunction with the above device embodiment. The relevant technical details and technical effects mentioned in the above embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the above embodiment.

[0057] In the embodiment of the present application, the opening and closing of the gas passage is achieved by an air vent gate connected to the gas detector, and multiple ventilation hoses are connected to the air vent gate. The air vent gate is used to control the deflation of the multiple ventilation hoses, so that it is possible to directly test whether the gases at multiple detection points at different heights in the manhole are toxic and harmful in one test, without adjusting the length of the ventilation hose. By achieving multi-point detection with one adjustment, the efficiency of gas detection in the manhole is improved. At the same time, due to the different lengths of the ventilation hoses, that is, different ventilation hoses have different heights of detection positions for detecting the manhole, the lengths of different ventilation hoses can be set according to needs, and there is no need to adjust the length of the ventilation hose after testing the gas at one detection point, which improves the accuracy of the detection point during detection, thereby improving the efficiency of detecting toxic and harmful gases in the manhole while improving the accuracy of the detection position.

[0058] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A multi-point gas detection device in a well, characterized in that: include: Gas detectors, vent valves and multiple ventilation hoses; The plurality of ventilation hoses are connected to the air release valve, and the air release valve is used to control the opening or closing of the gas passage between the plurality of ventilation hoses and the gas detector; The air release valve is connected to the gas detector; The plurality of ventilation hoses have different lengths.

2. The multi-point gas detection device in a well according to claim 1, characterized in that: The air release valve comprises a control motor, a baffle, an air release valve air inlet and an air release valve air outlet; The number of branches of the air inlet of the air release brake is the same as the number of the plurality of ventilation hoses, and each branch is connected to a ventilation hose; The baffle is located between the branch of the air inlet of the air release lock and the air outlet of the air release lock; The air outlet of the air release valve is connected to the gas detector; The control motor is connected to the baffle and is used to control the movement of the baffle.

3. The multi-point gas detection device in a well according to claim 2, characterized in that: The widths of the branches are all equal; The baffle includes a left baffle and a right baffle, and the control motor is connected to the left baffle and the right baffle respectively; The spacing distance between the left blocking piece and the right blocking piece is equal to the width of the branch.

4. The multi-point gas detection device in a well according to claim 3, characterized in that: When the control motor controls the baffle to move, the left baffle and the right baffle are simultaneously controlled to move in the same direction; The maximum distance that the baffle moves in the same direction is twice the width of the branch; When the baffle moves to a maximum moving distance in the same direction, the control motor switches the motor direction to a reverse direction.

5. The multi-point gas detection device in a well according to claim 4, characterized in that: The baffle is a metal baffle; A metal coil is wound around the branch wall of the air inlet branch of the air release lock, and the metal coil is connected to a power supply; After the control motor controls the baffle to move, the metal coil is energized by the power supply, and the baffle is adsorbed by the magnetic force generated by the energization, thereby closing the air path that does not need to be detected.

6. The multi-point gas detection device in a well according to claim 5, characterized in that: The outermost layer of the baffle is an insulating layer.

7. The multi-point gas detection device in a well according to any one of claims 2 to 6, characterized in that: The width of the branch is equal to the width of the air outlet of the air release lock.

8. The multi-point gas detection device in a well according to any one of claims 2 to 6, characterized in that: The device also includes a detection result recording module; The test result recording module includes a data group recording submodule and a result recording submodule; Wherein, the data group recording submodule is connected to the control motor and calculates the currently measured branch according to the number of forward and reverse rotations of the control click; The result recording submodule is connected to the gas detector and records the gas detection results.

9. A multi-point gas detection method in a well, characterized in that: include: Gas detection is performed on the communication pipeline entering the well by using the multi-point gas detection device in the well described in any one of claims 1 to 8.

10. The method for multi-point gas detection in a well according to claim 9, characterized in that: The method comprises: placing the plurality of ventilation hoses into the manhole; starting the air release valve to control the gas in the ventilation hoses to be input into the gas detector for detection.

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