Safety protection system of pipeline detector

Abstract

The invention provides a safety protection system of a pipeline detector, and belongs to the technical field of pipeline safety. The safety protection system is applied to the pipeline detector, the safety protection system comprises a pressure switch and a control device, the pressure switch is used for detecting the pressure value outside a cabin body, when the pressure value is larger than a first pressure threshold value, the pressure switch is closed, and when the pressure value is smaller than a second pressure threshold value, the pressure switch is disconnected; the control device is used for controlling the battery pack to supply power to the detection body and the detection probe when detecting that the pressure switch is closed, and controlling the battery pack to stop supplying power to the detection body and the detection probe when detecting that the pressure switch is disconnected. By adopting the pipeline detector, the use safety of the pipeline detector is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pipeline safety, and in particular to a safety protection system for a pipeline detector. Background Art

[0002] Oil and gas pipelines are the main means of oil and gas transportation. Since oil and gas are flammable and explosive substances, it is necessary to use pipeline detectors to regularly detect the performance of oil and gas pipelines in order to carry out timely maintenance and repair of oil and gas pipelines.

[0003] Usually, when using a pipeline detector for detection, the staff needs to first control the battery pack through the control device of the pipeline detector to power on the detection device, so that the detection device is in a detection state, and then put the pipeline detector into a sending and receiving ball barrel, and use the sending and receiving ball barrel to put the pipeline detector into the oil and gas pipeline. After the detection is completed, the sending and receiving ball barrel also needs to be used to recover the pipeline detector.

[0004] However, during the process of deploying or recovering the pipeline detector, the electrical sparks that may be generated by the pipeline detector are potential ignition sources. When encountering the flammable gas (oxygen) in the transmitting and receiving tube, it is easy to explode, resulting in low safety of the pipeline detector during use. Summary of the invention

[0005] The embodiment of the present disclosure provides a safety protection system for a pipeline detector, which can improve the safety of the pipeline detector during use. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a safety protection system for a pipeline detector, the safety protection system is applied to the pipeline detector, the pipeline detector comprises a cabin, a detection device and a battery pack, the detection device comprises a detection body and a detection probe, the detection body is located in the cabin and connected to the cabin, one end of the detection probe is located in the cabin and electrically connected to the detection body, the other end of the detection probe is located outside the cabin, the battery pack is located in the cabin and connected to the cabin;

[0007] The safety protection system includes a pressure switch and a control device;

[0008] The pressure switch is located outside the cabin and connected to the cabin. The pressure switch is used to: periodically detect the pressure value outside the cabin, close when the pressure value is greater than a first pressure threshold, and open when the pressure value is less than a second pressure threshold;

[0009] The control device is located in the cabin and connected to the cabin. The control device is electrically connected to the detection body, the battery pack, and the pressure switch, respectively. The control device is used to: when it is detected that the pressure switch is closed, control the battery pack to supply power to the detection body and the detection probe; when it is detected that the pressure switch is disconnected, control the battery pack to stop supplying power to the detection body and the detection probe.

[0010] In a possible implementation, the safety protection system further includes an electric control switch;

[0011] The electric control switch is located in the cabin and is electrically connected to the detection body, the battery pack, and the control device respectively;

[0012] The control device is used to: when detecting that the pressure switch is closed, control the electric control switch to be in a conducting state, so that the battery pack can supply power to the detection body and the detection probe;

[0013] When it is detected that the pressure switch is disconnected, the electric control switch is controlled to be in an off state, so that the battery pack stops supplying power to the detection body and the detection probe.

[0014] In a possible implementation, the electrically controlled switch is an optocoupler switch.

[0015] In a possible implementation, the first pressure threshold is 2 MPa (M Pascal, megapascal), and the second pressure threshold is 1.6 MPa.

[0016] In a possible implementation, the safety protection system further includes an absolute pressure sensor, which is located in the cabin and is used to detect an absolute pressure value in the cabin and send the absolute pressure value to the control device;

[0017] The control device is used to control the battery pack to stop supplying power to the detection body when the received absolute pressure value is outside the absolute pressure interval.

[0018] In a possible implementation, the absolute pressure interval is [105 kPa (K Pascal, kilopascal), 150 kPa].

[0019] In one possible implementation, the control device is also used to: when the received absolute pressure value is outside the absolute pressure range, control the output voltage of the battery pack to drop to less than a preset voltage threshold, and control the output current of the battery pack to drop to less than a preset current threshold.

[0020] In a possible implementation, the preset voltage threshold is 5.88V, and the preset current threshold is 160mA.

[0021] In a possible implementation, the control device is further used for:

[0022] When the pressure switch is detected to be closed, waiting for a first preset time, and if the pressure switch is not detected to be disconnected within the first preset time, controlling the battery pack to supply power to the detection body and the detection probe;

[0023] When it is detected that the pressure switch is disconnected, wait for a second preset time period. If the pressure switch is not detected to be closed within the second preset time period, control the battery pack to stop supplying power to the detection body and the detection probe.

[0024] In a possible implementation, the safety protection system further includes a packaging component, which is connected to the control device and is used to package the control device.

[0025] The beneficial effects of the technical solution provided by the embodiments of the present disclosure are as follows: in the solution mentioned in the embodiments of the present disclosure, when the pressure switch is closed, it means that the pipeline detector has entered the oil and gas pipeline from the sending and receiving ball barrel during the delivery process. At this time, the control device can control the battery pack to power the detection body and the detection probe; when the pressure switch is disconnected, it means that the pipeline detector has entered the sending and receiving ball barrel from the oil and gas pipeline during the recovery process. At this time, the control device can control the battery pack to stop powering the detection body and the detection probe. From the above, when the pipeline detector is located in a device such as a sending and receiving ball barrel where combustible gas exists, the battery pack stops powering the detection device, reducing the risk of explosion caused by electrical sparks encountering combustible gas, thereby improving the safety of the pipeline detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a structural schematic diagram of a safety protection system for a pipeline detector provided by an embodiment of the present disclosure;

[0028] Figure 2 is a circuit topology diagram of an electric control switch provided by an embodiment of the present disclosure;

[0029] Figure 3It is a circuit topology diagram of a control circuit for controlling an electric switch to be turned on or off provided by an embodiment of the present disclosure;

[0030] Figure 4 is a flow chart of a method for controlling power supply of a battery pack provided by an embodiment of the present disclosure;

[0031] Figure 5 is a circuit topology diagram of a control circuit for controlling the output current and output voltage of a battery pack provided by an embodiment of the present disclosure;

[0032] Figure 6 is a schematic structural diagram of a control device before packaging provided by an embodiment of the present disclosure;

[0033] Figure 7 It is a schematic diagram of the structure of a control device after packaging provided by an embodiment of the present disclosure.

[0034] Legend

[0035] 1. Cabin; 2. Detection device; 3. Battery pack;

[0036] 21. Detection body; 22. Detection probe;

[0037] 4. Pressure switch; 5. Control device; 6. Electric control switch; 7. Absolute pressure sensor. DETAILED DESCRIPTION

[0038] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0040] The present disclosure provides a safety protection system for a pipeline detector. The safety protection system is applied to the pipeline detector. Figure 1 The pipeline detector includes a cabin 1, a detection device 2 and a battery pack 3.

[0041] The detection device 2 is used to detect the performance status inside the oil and gas pipeline when the pipeline detector is located inside the oil and gas pipeline.

[0042] The detection device 2 includes a detection body 21 and a detection probe 22, wherein the detection body 21 is located in the cabin 1 and connected to the cabin 1, one end of the detection probe 22 is located in the cabin 1 and electrically connected to the detection body 21, and the other end of the detection probe 22 is located outside the cabin 1, and is used to detect the performance status in the oil and gas pipeline and transmit the detected information to the detection body 21 for data processing.

[0043] The battery pack 3 is located in the cabin 1 and connected to the cabin 1. The battery pack 3 is used to supply power to various devices in the pipeline detector.

[0044] The safety protection system includes a pressure switch 4 and a control device 5 .

[0045] The pressure switch 4 is located outside the cabin 1 and is connected to the cabin 1 .

[0046] The pressure switch 4 is used to periodically detect the pressure value outside the cabin 1. When the pressure value is greater than a first pressure threshold, the pressure switch 4 is closed and sends a closing signal. When the pressure value is less than a second pressure threshold, the pressure switch 4 is opened.

[0047] The control device 5 is located in the cabin 1 and is connected to the cabin 1 . The control device 5 is electrically connected to the detection body 21 , the battery pack 3 , and the pressure switch 4 , respectively.

[0048] The control device 5 is used to: when it is detected that the pressure switch 4 is closed, control the battery pack 3 to supply power to the detection body 21 and the detection probe 22; when it is detected that the pressure switch 4 is disconnected, control the battery pack 3 to stop supplying power to the detection body 21 and the detection probe 22.

[0049] From the above, in practice, the control method of the safety protection system of the pipeline detector is: the staff first controls the battery pack 3 to power the control device 5, but the battery pack 3 does not power the detection device 2, and then puts the pipeline detector into the sending and receiving tube.

[0050] In the process of using the sending and receiving ball barrel to launch the pipeline detector, that is, in the process of the pipeline detector entering the oil and gas pipeline from the sending and receiving ball barrel, the pressure value detected by the pressure switch 4 gradually increases. When it increases to the first pressure threshold, the pressure switch 4 is closed. After the pressure switch 4 is closed, the pressure switch 4 will send a closing signal to the control device 5. When the control device 5 receives the closing signal, it determines that the pipeline detector has entered the oil and gas pipeline. At this time, the control device 5 controls the battery pack 3 to start powering the detection body 21 and the detection probe 22, and the detection body 21 and the detection probe 22 start working.

[0051] After the detection device 2 completes the detection of the oil and gas pipeline, the pipeline detector will be recovered through the sending and receiving tube.

[0052] During the recovery process, that is, the process of the pipeline detector entering the sending and receiving ball cylinder from the oil and gas pipeline, the pressure value detected by the pressure switch 4 will gradually decrease. When it decreases to the second pressure threshold, the pressure switch 4 will be disconnected. After the pressure switch 4 is disconnected, the pressure switch 4 will send a disconnection signal to the control device 5. When the control device 5 receives the disconnection signal, it determines that the pipeline detector has entered the sending and receiving ball cylinder. At this time, the control device 5 can control the battery pack 3 to stop supplying power to the detection body 21 and the detection probe 22, and the detection body 21 and the detection probe 22 stop working.

[0053] Then, the staff can take out the pipeline detector from the transmitting and receiving tube, and obtain the performance status information of the detected oil and gas pipeline from the detection body 21 or the control device 5 of the pipeline detector.

[0054] During the above-mentioned delivery and recovery process, when the pipeline detector is located inside the sending and receiving ball barrel, a device where combustible gas exists, the detection device 2 of the pipeline detector is not powered on. The detection device 2 is not powered on until the pipeline detector enters the oil and gas pipeline, thereby avoiding the possibility of the pipeline detector exploding due to electrical sparks in the sending and receiving ball barrel, thereby improving the safety of the pipeline detector.

[0055] It can be understood that the first pressure threshold can be the pressure value detected in the oil and gas pipeline, or it can be a value that is larger than the pressure value in the transmitting and receiving cylinder and slightly smaller than the pressure value in the oil and gas pipeline. Similarly, the second pressure value can be the pressure value detected in the transmitting and receiving cylinder, or it can be a value that is slightly larger than the pressure value in the transmitting and receiving cylinder and smaller than the pressure value in the oil and gas pipeline.

[0056] For example, in the embodiment of the present disclosure, the first pressure threshold may be 2 MPa, and the second pressure threshold may be 1.6 MPa. Thus, when the pressure switch 4 is closed, it indicates that the vehicle has entered the oil and gas pipeline, and when the pressure switch 4 is disconnected, it indicates that the vehicle has entered the transmitting and receiving ball cylinder.

[0057] The above-mentioned first pressure threshold and second pressure threshold are only examples. The first pressure threshold and the second pressure threshold may be equal or unequal, and their specific values ​​may be set according to actual conditions. The embodiments of the present disclosure do not specifically limit this.

[0058] In one possible implementation, the safety protection system of the pipeline detector may include a plurality of pressure switches 4, which are connected in parallel and then electrically connected to a control device 5. Thus, if one of the pressure switches 4 fails, the other pressure switches 4 can still work normally, thereby improving the accuracy of detection.

[0059] The specific number of the plurality of pressure switches 4 may be any reasonable number, for example, 2, 3, etc., and the embodiment of the present disclosure does not limit this.

[0060] In a possible implementation, the structure of the control device 5 controlling whether the battery pack 3 supplies power to the detection body 21 and the detection probe 22 may be: Figure 1 As shown, the safety protection system of the pipeline detector also includes an electric control switch 6, which is located in the cabin 1 and is electrically connected to the detection body 21, the battery pack 3, and the control device 5 respectively.

[0061] The control device 5 is used to: when it is detected that the pressure switch 4 is closed, control the electronic switch 6 to be in the on state so that the battery pack 3 can supply power to the detection body 21 and the detection probe 22; when it is detected that the pressure switch 4 is disconnected, control the electronic switch 6 to be in the off state so that the battery pack 3 stops supplying power to the detection body 21 and the detection probe 22.

[0062] From the above, in implementation, during the delivery process, the pressure value detected by the pressure switch 4 gradually increases, and when it increases to the first pressure threshold, the pressure switch 4 is closed. After the pressure switch 4 is closed, the pressure switch 4 will send a closing signal to the control device 5. When the control device 5 receives the closing signal, it will control the electric control switch 6 to change from the disconnected state to the on state. When the electric control switch 6 is in the on state, the battery pack 3 supplies power to the detection body 21 and the detection probe 22, and the detection body 21 and the detection probe 22 start working.

[0063] During the recycling process, the pressure value detected by the pressure switch 4 will gradually decrease. When it decreases to the second pressure threshold, the pressure switch 4 will be disconnected. After the pressure switch 4 is disconnected, the pressure switch 4 will send a disconnection signal to the control device 5. When the control device 5 receives the disconnection signal, it will control the electric control switch 6 to change from the on state to the off state. When the electric control switch 6 is in the off state, the battery pack 3 stops supplying power to the detection body 21 and the detection probe 22, and the detection body 21 and the detection probe 22 stop working.

[0064] In the disclosed embodiment, the electric control switch 6 can be any type of electric control switch, for example, it can be a relay, etc. Of course, it can also be other reasonable electric control switches. When the electric control switch 6 is a relay, it can be a coupling switch. When the coupling switch is disconnected, no electric spark is generated, which can further improve the safety of the pipeline detector during use.

[0065] For example, Figure 2 As shown, the electric control switch 6 is in the form of four coupling switches (U6, U7, U8, U9) connected in parallel, and the input voltage of the electric control switch 6 is limited by the control device 5. Figure 2 The 3.2V voltage is obtained by the control device 5 converting the output voltage 32V of the battery pack 3. The maximum input current of the electronically controlled switch 6 is limited by the four resistors R13, R37, R38 and R39. The output side BAT+ of the four coupling switches U6, U7, U8 and U9 is electrically connected to the positive electrode of the battery pack 3, and the voltage is 32V. The maximum output current is limited by the four 2A fuses F3, F4, F5 and F6, and UTO is electrically connected to the detection body 21.

[0066] for Figure 2 For the control of the electric switch 6, please refer to Figure 3 , Figure 3 P2.0 and P2.1 in are both electrically connected to the control device 5, Figure 3 HSW and Figure 2 The HSW in is the same line as Figure 2 The FG terminals of the four coupling switches in the control device 5 are electrically connected, and the control device 5 can control Figure 3 The two MOSFETs (Metal-Oxide-SemiconductorField-Effect Transistor) Q2 and MOSFET Q5 in the circuit are used to control Figure 2 To turn on or off the electronically controlled switch 6, the control device 5 can control the electronically controlled switch 6 to be turned off by controlling the MOSFET Q2 and the MOSFET Q5 to be turned on at the same time, and control the electronically controlled switch 6 to be turned on by controlling the MOSFET Q2 and the MOSFET Q5 to be turned on at the same time.

[0067] The structure of the electric control switch 6 can realize the power supply or power off (i.e. stop power supply) of the battery pack 3 to the detection body 21 and the detection probe 22. The specific values ​​of the above-mentioned components can be set according to the actual situation with the goal of being able to achieve conduction or disconnection through the electric control switch 6, and the embodiment of the present disclosure does not make specific limitations on this.

[0068] In a possible implementation, in order to further improve the safety of the pipeline detector, the following settings may be performed:

[0069] like Figure 1 As shown, the safety protection system of the pipeline detector may further include an absolute pressure sensor 7 , which is located in the cabin 1 and is used to detect the absolute pressure value in the cabin 1 and send the detected absolute pressure value to the control device 5 .

[0070] The control device 5 is used to control the battery pack 3 to stop supplying power to the detection body 21 and the detection probe 22 when the received absolute pressure value is outside the absolute pressure interval.

[0071] Among them, for the absolute pressure range: since the pipeline detector needs to inject nitrogen or other protective gases into the cabin 1 before use, and make the cabin 1 of the pipeline detector in a positive pressure state, the absolute pressure range can be the pressure range when the inside of the cabin 1 of the pipeline detector is always in a normal positive pressure state.

[0072] In implementation, the absolute pressure sensor 7 is used to detect the absolute pressure value inside the pipeline detector at all times during the entire process before the pipeline detector enters the sending and receiving ball cylinder, after entering the sending and receiving ball cylinder, in the oil and gas pipeline, after being recovered to the sending and receiving ball cylinder, and after being taken out of the sending and receiving ball cylinder, and send the detected absolute pressure value to the control device 5.

[0073] like Figure 4 As shown, after the control device 5 receives the absolute pressure value sent by the absolute pressure sensor 7, it compares the absolute pressure value with the pre-stored absolute pressure range.

[0074] If the absolute pressure value is within the absolute pressure range, it means that the inside of the pipeline detector is always in a positive pressure state and everything is normal. The pipeline detector can be used normally to detect the oil and gas pipelines, and the above-mentioned operation of controlling the battery pack 3 to power the detection body 21 and the detection probe 22 when the pressure switch 4 is detected to be closed can be performed normally.

[0075] If the absolute pressure value is outside the absolute pressure range, it means that a leak has occurred in the pipeline detector. At this time, if the battery pack 3 supplies power to the detection body 21 and the detection probe 22, the risk of explosion increases. Therefore, if the absolute pressure value is detected to be outside the absolute pressure range, regardless of whether the pressure switch 4 is detected to be closed, the battery pack 3 will not be controlled to supply power to the detection body 21 and the detection probe 22. Moreover, if the absolute pressure value is detected to be outside the absolute pressure range during the process of the battery pack 3 supplying power to the detection body 21 and the detection probe 22, the battery pack 3 will be controlled to stop supplying power to the detection body 21 and the detection probe 22, so as to reduce the risk and improve safety.

[0076] In the embodiment of the present disclosure, the absolute pressure interval can be any reasonable setting, for example, the absolute pressure interval can be [105kPa, 150kPa], where 105kPa is to ensure that the absolute pressure value is in a positive pressure state, and 150kPa is a detection upper limit of an absolute pressure sensor. Of course, the absolute pressure interval can also be other settings, which are not specifically limited in the embodiment of the present disclosure.

[0077] In one possible implementation, Figure 4 As shown, the control device 5 is also used for: when the pressure switch 4 is detected to be closed, waiting for a first preset time period, if the pressure switch 4 is not detected to be disconnected within the first preset time period, then controlling the battery pack 3 to supply power to the detection body 21 and the detection probe 22; when the pressure switch 4 is detected to be disconnected, waiting for a second preset time period, if the pressure switch 4 is not detected to be closed within the second preset time period, then controlling the battery pack 3 to stop supplying power to the detection body 21 and the detection probe 22.

[0078] During implementation, since the pressure inside the sending and receiving ball cylinder and the oil and gas pipeline is relatively unstable, the pressure switch 4 may be temporarily closed in the sending and receiving ball cylinder or temporarily disconnected in the oil and gas pipeline. In order to avoid this situation and reduce safety, a first preset time length and a second preset time length are set.

[0079] After the pressure switch 4 is closed, wait for the first preset time. If the pressure switch 4 is always in the closed state during the first preset time, it means that the pressure is not unstable at this time, but the pipeline detector has entered the oil and gas pipeline from the sending and receiving tube. At this time, the battery pack 3 can be controlled to supply power to the detection body 21 and the detection probe 22. If the pressure switch 4 is disconnected during the first preset time, it means that the pressure is unstable at this time, not that the pipeline detector has entered the oil and gas pipeline. At this time, wait for the pressure switch 4 to close next time.

[0080] Similarly, when the pressure switch 4 changes from a closed state to an open state, the second preset time length is waited. If the pressure switch 4 is always in an open state during the second preset time length, it means that the pressure is not unstable at this time, but the pipeline detector has entered the transmitting and receiving tube from the oil and gas pipeline. At this time, the battery pack 3 can be controlled to stop supplying power to the detection body 21 and the detection probe 22. If the pressure switch 4 is closed during the second preset time length, it means that the pressure is unstable at this time, not that the pipeline detector has entered the transmitting and receiving tube. At this time, the pressure switch 4 can be waited for to be disconnected next time.

[0081] This setting can reduce errors and improve safety and stability.

[0082] It can be understood that, in the above process, the control device 5 is always determining whether the received absolute pressure value is within the absolute pressure range to improve safety.

[0083] In a possible implementation, the control device 5 is also used to: when the received absolute pressure value is outside the absolute pressure range, control the output voltage of the battery pack 3 to drop to less than a preset voltage threshold, and control the output current of the battery pack 3 to drop to less than a preset current threshold.

[0084] This arrangement can reduce the output power of the battery pack 3 when a leak may occur in the pipeline detector, further reducing the risk of explosion and improving safety in use.

[0085] Among them, the preset voltage threshold and the preset current threshold can be any reasonable thresholds, which only need to be sufficient to provide power for the safety detection part of the control device 5. For example, the preset voltage threshold can be 5.88V, and the preset current threshold can be 160mA. Of course, it can also be other values, and the embodiments of the present disclosure do not make specific limitations on this.

[0086] In a possible implementation, the method for controlling the output voltage and output current of the battery pack 3 may be: Figure 5 The BAT+ of the circuit shown is electrically connected to the positive electrode of the battery pack 3, and P3.1 is electrically connected to the control device 5. When the control device 5 detects that the absolute pressure value is outside the absolute pressure range, the control device can control Figure 5 The MOSFET Q6 in the battery pack 3 is closed, thereby limiting the output voltage and output current of the battery pack 3.

[0087] The specific values ​​of the above-mentioned components can be set according to actual conditions with the goal of reducing the output voltage and output current of the battery pack 3, and the embodiments of the present disclosure do not specifically limit this.

[0088] In a possible implementation, the safety protection system of the pipeline detector further includes a packaging component, which is connected to the control device 5 and is used to package the control device 5. Figure 6 and Figure 7 In the embodiment of the present disclosure, Figure 6 The control device 5 shown is encapsulated in accordance with Part 18: Equipment protection by enclosure "m" type for explosive atmospheres (IEC 60079-18-2014 / A1-2017) to obtain the following Figure 7 The packaged control device 5 shown is used to reduce the risk of explosion and further improve the safety of use.

[0089] The present disclosure also provides a pipeline detector, such as Figure 1As shown, the pipeline detector includes a cabin 1, a detection device 2, a battery pack 3 and any one of the safety protection systems of the pipeline detector described above.

[0090] The beneficial effects of the technical solution provided by the embodiment of the present disclosure are as follows: in the solution mentioned in the embodiment of the present disclosure, when the pressure switch 4 is closed, it means that the pipeline detector has entered the oil and gas pipeline from the sending and receiving ball barrel during the delivery process. At this time, the control device 5 can control the battery pack 3 to power the detection body 21 and the detection probe 22; when the pressure switch 4 is disconnected, it means that the pipeline detector has entered the sending and receiving ball barrel from the oil and gas pipeline during the recovery process. At this time, the control device 5 can control the battery pack 3 to stop powering the detection body 21 and the detection probe 22. As described above, when the pipeline detector is located in a device such as a sending and receiving ball barrel where combustible gas exists, the battery pack 3 stops powering the detection device 2, reducing the risk of explosion caused by electrical sparks encountering combustible gas, thereby improving the safety of the pipeline detector.

[0091] The above are only optional embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A safety protection system for a pipeline detector, characterized in that: The safety protection system is applied to a pipeline detector, the pipeline detector comprising a cabin (1), a detection device (2) and a battery pack (3), the detection device (2) comprising a detection body (21) and a detection probe (22), the detection body (21) being located in the cabin (1) and connected to the cabin (1), one end of the detection probe (22) being located in the cabin (1) and electrically connected to the detection body (21), the other end of the detection probe (22) being located outside the cabin (1), and the battery pack (3) being located in the cabin (1) and connected to the cabin (1); The safety protection system comprises a pressure switch (4) and a control device (5); The pressure switch (4) is located outside the cabin (1) and connected to the cabin (1). The pressure switch (4) is used to: periodically detect the pressure value outside the cabin (1), close when the pressure value is greater than a first pressure threshold, and open when the pressure value is less than a second pressure threshold; The control device (5) is located in the cabin (1) and is connected to the cabin (1). The control device (5) is electrically connected to the detection body (21), the battery pack (3), and the pressure switch (4) respectively. The control device (5) is used to: when it is detected that the pressure switch (4) is closed, control the battery pack (3) to supply power to the detection body (21) and the detection probe (22); when it is detected that the pressure switch (4) is disconnected, control the battery pack (3) to stop supplying power to the detection body (21) and the detection probe (22).

2. The safety protection system for pipeline detector according to claim 1, characterized in that: The safety protection system also includes an electric control switch (6); The electric control switch (6) is located in the cabin (1) and is electrically connected to the detection body (21), the battery pack (3), and the control device (5) respectively; The control device (5) is used to: when detecting that the pressure switch (4) is closed, control the electric control switch (6) to be in a conducting state, so that the battery pack (3) can supply power to the detection body (21) and the detection probe (22); When it is detected that the pressure switch (4) is disconnected, the electric control switch (6) is controlled to be in a disconnected state, so that the battery pack (3) stops supplying power to the detection body (21) and the detection probe (22).

3. The safety protection system for pipeline detector according to claim 2, characterized in that: The electric control switch (6) is an optical coupler switch.

4. The safety protection system for pipeline detector according to claim 1, characterized in that: The first pressure threshold is 2 MPa, and the second pressure threshold is 1.6 MPa.

5. The safety protection system for pipeline detector according to claim 1, characterized in that: The safety protection system further comprises an absolute pressure sensor (7), wherein the absolute pressure sensor (7) is located in the cabin (1) and is used to detect an absolute pressure value in the cabin (1) and send the absolute pressure value to the control device (5); The control device (5) is used to control the battery pack (3) to stop supplying power to the detection body (21) and the detection probe (22) when the received absolute pressure value is outside the absolute pressure range.

6. The safety protection system for pipeline detector according to claim 5, characterized in that: The absolute pressure interval is [105 kPa, 150 kPa].

7. The safety protection system for pipeline detector according to claim 5, characterized in that: The control device (5) is also used to: when the received absolute pressure value is outside the absolute pressure range, control the output voltage of the battery pack (3) to drop to less than a preset voltage threshold, and control the output current of the battery pack (3) to drop to less than a preset current threshold.

8. The safety protection system for pipeline detector according to claim 7, characterized in that: The preset voltage threshold is 5.88V, and the preset current threshold is 160mA.

9. The safety protection system for pipeline detector according to claim 1, characterized in that: The control device (5) is also used for: When the pressure switch (4) is detected to be closed, a first preset time period is waited, and if the pressure switch (4) is not detected to be disconnected within the first preset time period, the battery pack (3) is controlled to supply power to the detection body (21) and the detection probe (22); When it is detected that the pressure switch (4) is disconnected, a second preset time period is waited, and if the pressure switch (4) is not detected to be closed within the second preset time period, the battery pack (3) is controlled to stop supplying power to the detection body (21) and the detection probe (22).

10. The safety protection system for pipeline detector according to claim 1, characterized in that: The safety protection system further comprises a packaging component, which is connected to the control device (5) and is used to package the control device (5).

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