Device for automatically controlling running speed of detector in pipeline

Abstract

The utility model relates to the technical field of natural gas pipeline internal detection, and particularly discloses a pipeline internal detector running speed automatic control device which comprises a ball serving assembly and a ball receiving assembly, the ball receiving assembly can be connected with the ball serving assembly through a detected pipeline, and an internal detector used for pipeline internal detection is arranged in the detected pipeline. The inner detector can move from one end of the detected pipeline to the other end of the detected pipeline. According to the utility model, the running speed of the inner detector is adjusted in real time according to the flow and the pressure difference in the ball serving assembly and the ball receiving assembly, so that the problem that the controllability cannot be realized while the timeliness of the running speed control cannot be ensured in the running speed control mode of the existing pipeline inner detector is solved; the conditions of hysteresis quality and poor control precision of manually controlling the opening degree of the regulating valve to control the gas transmission amount are avoided, and meanwhile, the possibility of control failure of controlling the operation speed by controlling the opening degree of the drainage hole detected in the inner detection can be avoided, so that the detection data is more accurate, and the operation safety risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas pipeline internal detection, in particular to an automatic control device for the running speed of a pipeline internal detector. Background Art

[0002] In recent years, with the increase in the proportion of clean energy consumption in cities, the demand for natural gas has also grown rapidly, and accordingly, natural gas pipelines are facing a heavy load of transportation tasks. In order to ensure the safe operation of natural gas pipelines and extend their service life, natural gas pipelines need to be internally inspected after a period of operation. Generally, internal inspection mainly refers to the use of pipeline media to drive the detector to operate in the pipeline, real-time monitoring and recording of pipeline deformation, corrosion and other damage, and accurate positioning of the parts that need maintenance. In this way, defects in the pipeline body can be discovered in time, potential safety hazards in the pipeline can be eliminated, and the stable and reliable operation of the pipeline can be ensured, while extending the service life of the pipeline.

[0003] At present, the internal detectors used in the natural gas pipeline inspection process have certain requirements for the running speed. If the running speed in the pipeline is not within the specified speed, it will affect the inspection results. Usually, the running speed of the internal detector is controlled at 2-5m / s, and the existing internal inspection running speed control methods mainly include manually controlling the downstream regulating valve to control the gas transmission volume, or the internal detector itself obtains the current detector running speed through the mileage wheel, controls the opening of the internal detector's leakage hole to adjust the pressure difference before and after the detector, and then allows the internal detector to reach the preset running speed range.

[0004] However, the above-mentioned existing technical solutions have the following defects: for the control method of manually controlling the downstream regulating valve to control the gas delivery volume, since the valve opening is adjusted manually, it lacks timeliness and has large errors; and the internal detector itself obtains the current detector operating speed through the mileage wheel, controls the leakage hole opening of the internal detector to adjust the pressure difference before and after the detector, and then allows the detector to reach the preset operating speed range. The operating speed is controlled by controlling the leakage hole opening of the internal detection, which has the possibility of control failure. Once the control failure occurs, the internal detection will be in an uncontrollable state, and the accuracy and safety risks of the data are relatively large. Therefore, the existing pipeline internal detector operating speed control method has the problem of being unable to achieve controllability while ensuring the timeliness of the operating speed control. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide an automatic control device for the running speed of a detector in a pipeline, so as to solve the problem that the existing running speed control method of the detector in the pipeline proposed in the above background technology cannot achieve controllability while ensuring the timeliness of the running speed control.

[0006] The embodiment of the utility model is implemented as follows: an automatic speed control device for a detector in a pipeline, comprising a ball-serving assembly, arranged at one end of the pipeline to be inspected, and the automatic speed control device for the detector in the pipeline also includes:

[0007] A ball receiving assembly is arranged on one end of the inspected pipeline away from the ball issuing assembly, and the ball receiving assembly can be connected to the ball issuing assembly through the inspected pipeline; an internal detector for conducting in-pipeline detection is arranged in the inspected pipeline, and the internal detector can move from one end of the inspected pipeline to the other end to adjust the operating speed of the internal detector in real time according to the flow rate and pressure difference in the ball issuing assembly and the ball receiving assembly.

[0008] In order to reduce the unfavorable factors raised in the above-mentioned background technology, the automatic control device for the operating speed of the detector in the pipeline is used as a device for automatically controlling the gas flow rate in the pipeline. It controls the air intake and air outlet according to the detection of the upstream and downstream pressure difference, flow rate and pressure, and then finds the balance point of the relatively controllable operating speed of the internal detection, so that the operating speed of the internal detector is automatically controlled, avoiding the lack of timeliness of the control method of manually controlling the downstream regulating valve to control the gas delivery volume, thereby improving the controllability while ensuring the timeliness of the operating speed control.

[0009] Preferably, the ball-serving assembly includes at least a first ball valve, a first flow meter, a first pressure sensor, and a first electric regulating valve, and the first electric regulating valve, the first flow meter, and the first pressure sensor are provided with an interlocking control; the ball-receiving assembly includes at least a second electric regulating valve, a second flow meter, a second ball valve, and a second pressure sensor, and the second electric regulating valve, the second flow meter, and the second pressure sensor are provided with an interlocking control.

[0010] Preferably, the first ball valve of the ball serving assembly is connected to the first flow meter, the first pressure sensor, and the first electric regulating valve in sequence, and the first ball valve of the ball serving assembly is connected to the upstream air source as an inlet ball valve, and the first electric regulating valve is connected to the air inlet pipe of the ball serving barrel as an outlet regulating valve of the ball serving assembly.

[0011] Preferably, the second electric regulating valve of the ball receiving assembly is connected to the second flow meter, the second ball valve, and the second pressure sensor in sequence, and the second ball valve of the ball receiving assembly is connected to the outlet pipe of the ball receiving cylinder as an inlet ball valve, and the second electric regulating valve is connected to the downstream pipe as an outlet regulating valve of the ball receiving assembly.

[0012] Preferably, the flow rates in the serving assembly and the receiving assembly are obtained according to the following formula:

[0013] Q = π × (D / 2) 2 ×V×3600×P×10;

[0014] Wherein: Q represents the instantaneous flow rate of pipeline gas, in cubic meters per hour, which can be obtained according to the corresponding first flow meter and second flow meter; D represents the inner diameter of the inspected pipeline, in meters, which can be obtained according to measurement; V represents the required operating speed of the internal detector, in meters per second; P represents the current pressure of the pipeline, in MPa, which can be obtained according to the corresponding first pressure sensor and second pressure sensor; π represents pi.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the prior art, the automatic control device for the running speed of the pipeline detector provided by the embodiment of the utility model includes a ball-serving assembly and a ball-receiving assembly. The ball-receiving assembly can be connected to the ball-serving assembly through the pipeline to be inspected. The pipeline to be inspected is provided with an internal detector for pipeline detection, and the internal detector can move from one end of the pipeline to the other end. The device adjusts the running speed of the internal detector in real time according to the flow and pressure difference in the ball-serving assembly and the ball-receiving assembly, which not only avoids the hysteresis and poor control accuracy of the gas delivery volume controlled by the manual control of the opening of the regulating valve, and ensures the timeliness of the running speed control, but also avoids the possibility of control failure in controlling the running speed by controlling the opening of the leakage hole for internal detection, ensures that the internal detector is in a controllable state, makes the detection data more accurate, reduces the operational safety risk, and solves the problem that the existing pipeline internal detector running speed control method cannot achieve controllability while ensuring the timeliness of the running speed control. Moreover, the utility model has a simple structure, low operation difficulty, and is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0018] Figure 1 A schematic diagram of the structure of an automatic control device for the operating speed of a detector in a pipeline provided in one embodiment of the utility model.

[0019] In the figure: 101-first ball valve; 102-first flow meter; 103-first pressure sensor; 104-first electric regulating valve; 105-ball serving cylinder; 201-second electric regulating valve; 202-second flow meter; 203-second ball valve; 204-second pressure sensor; 205-ball receiving cylinder. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the technical solutions in the utility model will be described clearly and completely in conjunction with the drawings in the utility model. It should be understood that in the description of the utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features directly contacting, and can also include the first and second features not directly contacting but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature directly above and obliquely above the second feature, or simply indicate that the first feature is higher than the second feature in level. The first feature "below", "below" and "below" the second feature include the first feature directly below and obliquely below the second feature, or simply indicate that the first feature is less than the second feature in level. The above-indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0021] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1 As shown, it is a structural diagram of an automatic speed control device for a detector in a pipeline provided by an embodiment of the utility model. The automatic speed control device for the detector in a pipeline includes a ball-serving assembly, which is arranged at one end of the pipeline to be inspected. The automatic speed control device for the detector in a pipeline also includes:

[0023] A ball receiving assembly is arranged on one end of the inspected pipeline away from the ball issuing assembly, and the ball receiving assembly can be connected to the ball issuing assembly through the inspected pipeline; an internal detector for conducting in-pipeline detection is arranged in the inspected pipeline, and the internal detector can move from one end of the inspected pipeline to the other end to adjust the operating speed of the internal detector in real time according to the flow rate and pressure difference in the ball issuing assembly and the ball receiving assembly.

[0024] In the embodiment of the utility model, specifically, by performing a back pressure value detection on the inspected pipeline, the internal detector is placed at one end of the inspected pipeline, the process is checked, and the ball-serving mode is entered. The target flow and pressure of the ball-serving assembly and the ball-receiving assembly are set according to the inner diameter of the inspected pipeline and the specified running speed of the internal detector, and the flow regulating assembly inside the ball-serving assembly and the ball-receiving assembly is controlled by the main controller to slowly adjust the opening of the flow regulating assembly, thereby automatically controlling the running speed of the detector in the pipeline within a reasonable range.

[0025] In one example of the utility model, the in-pipeline detection is an operation that utilizes the pipeline medium to drive the internal detector to run in the pipeline, detects and records the deformation, corrosion and other damage conditions of the pipeline in real time, and accurately locates the pipeline.

[0026] In another example of the present invention, the flow regulating component can specifically adopt a flow regulating product in the prior art, for example, it can be a valve product in the prior art, such as a manual valve, an electric valve, a hydraulic valve, a pneumatic valve, a turbine valve, a solenoid valve, an electromagnetic hydraulic valve, an electro-hydraulic valve, a gas-liquid valve, a gear valve, etc. The specific model is selected according to demand and is not limited here. The electric regulating valve product in the prior art is preferred here. The valve relies on a drive or automatic mechanism to make the opening and closing parts move up and down, slide, swing or rotate, so as to slowly adjust the opening of the flow regulating component, thereby controlling the flow rate and achieving the effect of controlling the operating speed of the detector in the pipeline within a reasonable range.

[0027] Furthermore, as a preferred embodiment of the utility model, the ball-serving assembly at least includes a first ball valve 101, a first flow meter 102, a first pressure sensor 103, and a first electric regulating valve 104, and the first electric regulating valve 104 and the first flow meter 102 and the first pressure sensor 103 are provided with interlocking control; the ball-receiving assembly at least includes a second electric regulating valve 201, a second flow meter 202, a second ball valve 203, and a second pressure sensor 204, and the second electric regulating valve 201 and the second flow meter 202 and the second pressure sensor 204 are provided with interlocking control.

[0028] It should be noted that the interlocking control as a linkage control method can be specifically referred to the prior art to ensure the safe and reliable operation of the system. For example, electrical interlocking can be used, which is a method of using contactor auxiliary contacts, relay contacts, composite buttons, etc. to mutually lock each other's circuits between various control link lines; mechanical interlocking can also be used, which is a method of using mechanical devices between contactors to mutually lock each other's contactors, such as using locking devices, limit switches, sensors, etc. to ensure the correct operation of equipment or systems under specific conditions. There are also hydraulic interlocking (interlocking control is achieved through hydraulic systems, such as using hydraulic valves, hydraulic sensors, etc. to monitor and control the operating status of hydraulic systems), pneumatic interlocking (interlocking control is achieved through pneumatic systems, such as using pneumatic valves, pneumatic sensors, etc. to monitor and control the operating status of pneumatic systems), logical interlocking (interlocking control is achieved through logical control, such as using a programmable controller (such as PLC) for logical judgment and control to ensure the correct operation of the system under specific conditions) and other methods. These interlocking control methods can be selected and combined according to specific application scenarios and requirements to achieve safe and reliable operation of the system, which is not limited here. Therefore, in this way, the forward rotation can be directly switched to the reverse rotation by pressing a button, and at the same time, they are mutually restricted to play a protective role. Here, electrical interlocking is preferably adopted. The implementation principle of electrical interlocking is to control the operation of the device or system through the state of the interlocking contact. When the interlocking contact is in a closed state, the corresponding device or system can be started or stopped; when the interlocking contact is in an open state, the start or stop of the corresponding device or system can be prevented. By reasonably setting the connection mode of the interlocking contact, the linkage control between devices or systems can be realized.

[0029] Furthermore, as a preferred embodiment of the utility model, the first ball valve 101 of the ball serving assembly is connected to the first flow meter 102, the first pressure sensor 103, and the first electric regulating valve 104 (that is, the electric regulating valve product in the prior art is used as the flow regulating assembly) in sequence, and the first ball valve 101 of the ball serving assembly is connected to the upstream air source as an inlet ball valve, and the first electric regulating valve 104 is connected to the air inlet pipe of the ball serving barrel 105 as an outlet regulating valve of the ball serving assembly.

[0030] Furthermore, as a preferred embodiment of the utility model, the second electric regulating valve 201 of the ball receiving assembly (that is, the electric regulating valve product in the prior art is used as the flow regulating assembly) is connected to the second flow meter 202, the second ball valve 203, and the second pressure sensor 204 in sequence, and the second ball valve 203 of the ball receiving assembly is connected to the outlet pipe of the ball receiving cylinder 205 as an inlet ball valve, and the second electric regulating valve 201 is connected to the downstream pipe as an outlet regulating valve of the ball receiving assembly.

[0031] Furthermore, as a preferred embodiment of the present invention, the air inlet pipe of the ball serving tube 105 and the air outlet pipe of the ball receiving tube 205 constitute an inspected pipe.

[0032] In the embodiment of the utility model, specifically, the first ball valve 101 of the ball-serving assembly is connected to the upstream gas source as an inlet ball valve, and the first electric regulating valve 104 is connected to the air inlet pipe of the ball-serving cylinder 105 as an outlet regulating valve of the ball-serving assembly. The second ball valve 203 of the ball-receiving assembly is connected to the air outlet pipe of the ball-receiving cylinder 205 as an inlet ball valve, and the second electric regulating valve 201 is connected to the downstream pipe as an outlet regulating valve of the ball-receiving assembly. The pipeline to be inspected is arranged between the air inlet pipe of the ball-serving cylinder 105 and the air outlet pipe of the ball-receiving cylinder 205, and then the pipeline to be inspected is subjected to a back pressure value detection (back pressure refers to the pressure at the rear end. It can be the pressure applied to the opposite direction of the moving fluid when it flows along its path (such as a pipeline or wind passage) in a closed container due to the obstruction of obstacles or sharp turns. It is usually used to describe the pressure of the fluid discharged from the system at the outlet or the secondary side (greater than the local atmospheric pressure)), and the internal detector is placed in the ball-serving cylinder 105 to check the process, so that the ball-serving mode can be entered.

[0033] Furthermore, as a preferred embodiment of the utility model, the automatic control device for the running speed of the pipeline internal detector also includes a pressure-applying part for performing back pressure value detection on the inspected pipeline before the internal detector moves along one end of the inspected pipeline to the other end.

[0034] In one example of the utility model, the pressure-applying part may be an obstacle or a sharp turn when the moving fluid flows along its path in the inspected pipeline. The specific shape may be selected according to the needs and is not limited here. Therefore, the pressure opposite to the direction of movement is applied by being blocked by the obstacle or the sharp turn.

[0035] Specifically, by performing a numerical back pressure detection on the inspected pipeline (back pressure refers to the pressure at the rear end. It can be the pressure in the opposite direction of the moving direction applied when the moving fluid flows along its path (such as a pipeline or air passage) in a closed container due to the obstruction of obstacles or sharp turns. It is usually used to describe the pressure of the fluid discharged from the system at the outlet or secondary side (greater than the local atmospheric pressure)), the internal detector is placed in the serving tube 105, the process is checked, and the serving mode is entered. The target flow and target pressure of the serving sled and the receiving sled are set according to the inner diameter of the inspected pipeline and the specified operating speed of the detector. The main controller controls the electric regulating valve to slowly adjust the valve opening, and automatically adjusts the opening of the electric regulating valve according to the flow and pressure difference in real time, so as to control the operating speed of the detector in the pipeline within a reasonable range. The automatic control device for the operating speed of the detector in the pipeline not only ensures the relative controllability and stability of the operating speed of the detector in the pipeline, making the detection data more accurate, but also prevents the operating speed of the internal detector from getting out of control, thereby extending the service life of the detector in the pipeline.

[0036] In practical applications, first, the ball-serving assembly and the ball-receiving assembly are designed and manufactured as two simple prys, wherein the ball-serving assembly is used as a ball-serving pry and the ball-receiving assembly is used as a ball-receiving pry, and both the ball-serving pry and the ball-receiving pry contain at least a flow meter, a pressure sensor, an electric regulating valve, and a ball valve. Specifically, the ball-serving assembly at least contains a first ball valve 101, a first flow meter 102, a first pressure sensor 103, and a first electric regulating valve 104, and the first electric regulating valve 104 is provided with an interlocking control with the first flow meter 102 and the first pressure sensor 103; the ball-receiving assembly at least contains a second electric regulating valve 201, a second flow meter 202, a second ball valve 203, and a second pressure sensor 204, and the second electric regulating valve 201 is provided with an interlocking control with the second flow meter 202 and the second pressure sensor 204. Secondly, the inlet of the ball-serving assembly is connected to the upstream gas source, and the outlet is connected to the air inlet pipe of the ball-serving cylinder 105; the inlet of the ball-receiving assembly is connected to the air outlet pipe of the ball-receiving cylinder 205, and the outlet is connected to the downstream pipe. Then, the back pressure value of the inspected pipeline is detected, and the internal detector is placed in the ball-serving barrel 105, the process is checked, and the ball-serving mode is entered. Finally, the target flow and target pressure of the ball-serving sled and the ball-receiving sled are set according to the inner diameter of the inspected pipeline and the specified operating speed of the internal detector. The main controller controls the first electric regulating valve 104 and the second electric regulating valve 201 to slowly adjust the valve opening, and automatically adjusts the opening of the first electric regulating valve 104 and the second electric regulating valve 201 according to the flow and pressure difference in real time, so as to achieve the effect of controlling the operating speed of the detector in the pipeline within a reasonable range. The above is also used as an automatic control method for the operating speed of the detector in the pipeline, and the operating speed of the internal detector in the pipeline is controlled by automatically controlling the opening of the regulating valve. This method controls the air intake of the ball-serving sled and the air outlet of the ball-receiving sled according to the upstream and downstream pressure differences, flow rates, and pressures, and then finds the balance point of the relatively controllable operating speed of the internal detection, so that the operating speed of the internal detector is automatically controlled.

[0037] The flow rate of the ball launching and receiving skids is obtained by the following formula:

[0038] Q = π × (D / 2) 2 ×V×3600×P×10;

[0039] Among them: Q represents the instantaneous flow rate of pipeline gas, in cubic meters per hour; D represents the inner diameter of the pipeline under inspection, in meters; V represents the required operating speed of the internal detector, in meters per second; P represents the current pipeline pressure, in MPa. π refers to pi in geometry. The ratio of the circumference of any circle to its diameter is a constant value of π. π is an infinite non-repeating decimal, and is usually taken as 3.14.

[0040] The implementation principle of this embodiment is: by performing a back pressure value detection on the inspected pipeline, the internal detector is placed in the serving barrel 105, the process is checked, and the serving mode is entered. The target flow and target pressure of the serving pry and the receiving pry are set according to the inner diameter of the inspected pipeline and the specified running speed of the detector, and the main controller controls the electric regulating valve to slowly adjust the valve opening, and automatically adjusts the opening of the electric regulating valve according to the flow and pressure difference in real time, so as to control the running speed of the detector in the pipeline within a reasonable range. The automatic control device for the running speed of the detector in the pipeline not only ensures the relative controllability and stability of the running speed of the detector in the pipeline, making the detection data more accurate, but also prevents the running speed of the internal detector from getting out of control, thereby extending the service life of the detector in the pipeline.

[0041] The devices mentioned in this article can be connected to the external main controller and 220V mains, and the main controller can be a conventional known device for controlling computers, etc. For example, it can be a main controller based on P2C technology, which is used to control and manage power equipment, such as lamps, small appliances, super switches and sockets, etc. It can realize remote control and cloud data transmission through home LAN and broadband network. It can also be a control system main control board, which is the core part of the control system hardware, composed of processing chips and peripherals. The processing chip can be a microprocessor, a microcontroller or a digital signal processor, which is responsible for processing information and data. The peripherals include storage units, external interfaces, external crystal oscillators, switch elements, etc., which are used to interact and control with external devices. It can also be a main controller in a computer system, which is responsible for managing various software and hardware resources of the computer so that various parts of the computer can work in coordination and effectively. It can be selected according to specific needs, and it is not limited here, as long as it can be realized that the electric control valve can be controlled by the main controller to slowly adjust the valve opening, and the opening of the electric control valve can be automatically adjusted according to the flow and pressure difference in real time, so as to control the running speed of the detector in the pipeline within a reasonable range.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] It should be further explained that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The statement "including a defined element does not exclude the existence of other identical elements in the process, method, article or device including the element". The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection method of each part can adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art, which will not be described in detail here.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An automatic control device for the running speed of a detector in a pipeline, comprising a ball-launching assembly, arranged at one end of the pipeline to be inspected, characterized in that: The automatic control device for the running speed of the in-pipe detector also includes: A ball receiving assembly is arranged on one end of the inspected pipeline away from the ball issuing assembly, and the ball receiving assembly can be connected to the ball issuing assembly through the inspected pipeline; an internal detector for conducting pipeline inspection is arranged in the inspected pipeline, and the internal detector can move from one end of the inspected pipeline to the other end, so as to adjust the running speed of the internal detector in real time according to the flow rate and pressure difference in the ball issuing assembly and the ball receiving assembly; The ball-delivering assembly at least comprises a first ball valve (101), a first flow meter (102), a first pressure sensor (103), and a first electric regulating valve (104), and the first electric regulating valve (104) is provided with an interlocking control with the first flow meter (102) and the first pressure sensor (103); the ball-receiving assembly at least comprises a second electric regulating valve (201), a second flow meter (202), a second ball valve (203), and a second pressure sensor (204), and the second electric regulating valve (201) is provided with an interlocking control with the second flow meter (202) and the second pressure sensor (204); The first ball valve (101) is connected to the first flow meter (102), the first pressure sensor (103), and the first electric regulating valve (104) in sequence, and one end of the first ball valve (101) is connected to an upstream air source, and the first electric regulating valve (104) is connected to an air inlet pipe of a serving tube (105); The second electric regulating valve (201) is connected to the second flow meter (202), the second ball valve (203), and the second pressure sensor (204) in sequence, and the second ball valve (203) is also connected to the air outlet pipeline of the ball collecting cylinder (205), and the second electric regulating valve (201) is connected to the downstream pipeline.

2. The automatic control device for the running speed of a detector in a pipeline according to claim 1 is characterized in that: The inspected pipeline is formed between the air inlet pipeline of the ball-issuing cylinder (105) and the air outlet pipeline of the ball-collecting cylinder (205).

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