Speed ​​regulating device and speed control system

Abstract

The present invention discloses a speed regulating device and a speed control system for regulating the moving speed of an internal detector or a pipe cleaner of a pipeline. The speed regulating device comprises: an execution chamber, the execution chamber comprises a drain port; a bypass valve, the bypass valve is arranged in the execution chamber and is used to open or close the drain port; a bypass valve actuator, the bypass valve actuator is connected to the bypass valve and controls the opening of the bypass valve relative to the drain port; a speed control unit, the speed control unit controls the bypass valve actuator to adjust the opening of the bypass valve according to the real-time speed obtained by detection; wherein, when the real-time speed obtained by detection is less than the first threshold speed, the bypass valve actuator is controlled to drive the bypass valve to reduce the opening relative to the drain port; when the real-time speed obtained by detection is greater than the second threshold speed, the bypass valve actuator is controlled to drive the bypass valve to increase the opening relative to the drain port, and the second threshold speed is greater than the first threshold speed.

Description

Technical Field

[0001] The invention relates to a speed regulating device and a speed control system having the speed regulating device. Background Art

[0002] At present, the most suitable detection speed of magnetic flux leakage internal detectors used in pipelines is 0-5m / s, and the best detection speed is about 2m / s. However, the medium speed of many oil and gas pipelines is much higher than this speed, so it is necessary to control the speed of magnetic flux leakage internal detectors to a certain extent.

[0003] The speed regulating devices currently in use on the market are divided into mechanical and electronic types, and these speed regulating devices have three main problems: 1) Mechanical speed regulating devices do not know how to calculate and select springs for equipment operators, nor do they know the target speed of the speed regulating equipment, which is not conducive to promotion; 2) Mechanical speed regulating devices do not have adaptive capabilities and are difficult to adapt to various parameter changes during pipeline operation; 3) Electronic speed regulating devices use sensors to measure magnetic field strength to calculate the opening size of the speed regulating valve, but are interfered by the strong magnetic field in the leakage magnetic detector, making it impossible to use reliably in the leakage magnetic detector; 4) The speed regulating valve (bypass valve) in the current mechanical or electronic speed regulating devices has a complex structure and a small discharge area, which limits its scope of use. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide a speed regulating device for regulating the moving speed of an internal detector or a pig in a pipeline and a speed control system having the speed regulating device. In the speed regulating device and the speed control system, a speed control unit is provided to effectively control a bypass valve actuator according to the real-time speed.

[0005] According to one aspect of the present disclosure, a speed regulating device is provided, which is used to regulate the moving speed of an internal detector or a pipe cleaner of a pipeline, and the speed regulating device comprises: an execution chamber, which comprises a drain port; a bypass valve, which is arranged in the execution chamber and is used to open or close the drain port; a bypass valve actuator, which is connected to the bypass valve and controls the opening of the bypass valve relative to the drain port; and a speed control unit, which controls the bypass valve actuator to regulate the opening of the bypass valve according to a real-time speed obtained by detection; wherein, when the real-time speed obtained by detection is less than a first threshold speed, the bypass valve actuator is controlled to drive the bypass valve to reduce the opening relative to the drain port; when the real-time speed obtained by detection is greater than a second threshold speed, the bypass valve actuator is controlled to drive the bypass valve to increase the opening relative to the drain port, and the second threshold speed is greater than the first threshold speed.

[0006] In the speed regulating device according to one aspect of the present disclosure, the speed regulating device further includes a limit detection unit, which is disposed in the execution chamber to detect the opening of the bypass valve.

[0007] In a speed control device according to one aspect of the present disclosure, the speed control unit receives the opening information of the bypass valve detected by the limit detection unit; when the opening information received by the speed control unit is that the opening of the bypass valve is 100%, and the real-time speed detected is greater than a second threshold value, the speed control unit issues an instruction to the bypass valve actuator to stop driving the bypass valve; when the opening information received by the speed control unit is that the opening of the bypass valve is 0, and the real-time speed detected is less than a first threshold value, the speed control unit issues an instruction to the bypass valve actuator to stop driving the bypass valve.

[0008] In a speed control device according to one aspect of the present disclosure, the drain port is arranged on the side wall of the execution chamber, and the bypass valve can move along the axial direction of the execution chamber to open or close the drain port; when the real-time speed detected is less than the first threshold speed, the speed control unit controls the bypass valve actuator to drive the bypass valve to move in the direction of closing the drain port to reduce the opening of the bypass valve; when the real-time speed detected is greater than the second threshold speed, the speed control unit controls the bypass valve actuator to drive the bypass valve to move in the direction of opening the drain port.

[0009] In a speed control device according to one aspect of the present disclosure, the limit detection unit includes: a position sensor rod, which is arranged in the execution chamber along the axial direction of the execution chamber; a first limit measuring device, which is arranged on the position sensor rod and corresponds to the maximum opening position of the bypass valve, and outputs a corresponding level according to its distance relative to the bypass valve; and a second limit measuring device, which is arranged on the position sensor rod and corresponds to the minimum opening position of the bypass valve, and outputs a corresponding level according to its distance relative to the bypass valve; wherein the speed control unit determines the switching state of the bypass valve by detecting the levels output by the first limit measuring device and the second limit measuring device.

[0010] In a speed control device according to one aspect of the present disclosure, the bypass valve actuator includes: a micro hydraulic station connected to the speed control unit and the oil flow direction of which is controlled by the speed control unit; a double hydraulic oil pipe connected to the micro hydraulic station; a bidirectional hydraulic cylinder connected to the micro hydraulic station through the double hydraulic oil pipe, the bidirectional hydraulic cylinder including a retractable end, the retractable end is connected to the bypass valve, and can be retracted and extended along the axial direction of the execution chamber under the control of the micro hydraulic station to drive the bypass valve to move along the axial direction of the execution chamber.

[0011] In a speed control device according to one aspect of the present disclosure, the speed control device also includes a power unit and a power chamber, the power chamber is fixed to one of the two ends of the execution chamber along its axial direction, wherein the speed control unit, the power unit and the micro hydraulic station are all arranged in the power chamber; the bidirectional hydraulic cylinder is arranged in the execution chamber and fixed to one end of the execution chamber close to the power chamber; the dual hydraulic oil pipe is arranged between the execution chamber and the power chamber, one end of which extends into the execution chamber to connect to the bidirectional hydraulic cylinder, and the other end extends into the power chamber to connect to the micro hydraulic station.

[0012] In a speed control device according to one aspect of the present disclosure, the bypass valve includes: an annular baffle, which is close to the inner wall of the execution chamber, and when the bypass valve moves to close the drain port, the annular baffle covers the drain port; and a support plate connected to the annular baffle, wherein the retractable end of the bidirectional hydraulic cylinder is connected to the support plate to drive the bypass valve to move along the axial direction of the execution chamber.

[0013] In the speed regulating device according to one aspect of the present disclosure, the speed regulating device further includes an inlet, and the inlet is arranged on the side wall of the execution chamber.

[0014] According to another aspect of the present disclosure, a speed control system is provided, and the speed control system includes the above-mentioned speed regulating device.

[0015] In a speed control system according to another aspect of the present disclosure, the speed control system also includes a speed measuring device, which is connected to the speed regulating device and is used to detect the real-time speed of the internal detector or the pipe cleaner of the pipeline and feed back the detected real-time speed to the speed control unit of the speed regulating device.

[0016] In a speed control system according to another aspect of the present disclosure, the speed control system further includes a status display unit, which is connected to the speed regulating device and is used to display a status of speed regulation.

[0017] Compared with the prior art, in the speed control device and the speed control system having the speed control device provided by the embodiment of the present invention, the speed control unit controls the bypass valve actuator according to the real-time speed by setting the speed control unit. In addition, the speed control device is also provided with a limit detection unit, which simplifies the calculated analog quantity into a switch quantity to detect the opening of the bypass valve, and controls the bypass valve actuator according to the two aspects of the real-time speed and the opening information of the bypass valve (double limit detection), which can not only make the bypass valve actuator in most cases in a "resting" state and save electric energy, but also more reliable than the prior art in which the bypass valve opening is calculated based on the magnetic field and then set, therefore, the requirements for users are low, the adaptability of the speed control device is improved, and the adjustable speed range is large. In addition, a drain port is arranged on the side wall of the execution chamber of the speed control device, and the bypass valve can move along the axial direction of the execution chamber (that is, a "straight-line travel" design is adopted) to open or close the drain port. Compared with the bypass valve in the existing speed control device with a rotary switch, its structure is simpler and has smaller operating resistance. The drain port is larger in size, has a larger discharge area, and has a wider range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 is a schematic cross-sectional structural diagram of a speed regulating device according to an embodiment of the present invention; and

[0020] Figure 2 Schematic diagram showing the structure of a speed control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0022] Described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of embodiments of the present invention.However, it will be appreciated by those skilled in the art that without one or more of the specific details, or adopting other methods, components, materials, etc., technical solutions of the present invention can also be put into practice.In some cases, known structures, materials or operations are not shown or described in detail to avoid blurring the present invention.

[0023] According to the main idea of ​​the present invention, the speed regulating device of the present invention includes: an execution chamber, the execution chamber includes a drain port; a bypass valve, the bypass valve is arranged in the execution chamber and is used to open or close the drain port; a bypass valve actuator, the bypass valve actuator is connected to the bypass valve and controls the opening of the bypass valve relative to the drain port; a speed control unit, the speed control unit controls the bypass valve actuator to adjust the opening of the bypass valve according to the real-time speed obtained by detection; wherein, when the real-time speed obtained by detection is less than a first threshold speed, the bypass valve actuator is controlled to drive the bypass valve to reduce the opening relative to the drain port; when the real-time speed obtained by detection is greater than a second threshold speed, the bypass valve actuator is controlled to drive the bypass valve to increase the opening relative to the drain port, and the second threshold speed is greater than the first threshold speed.

[0024] The technical content of the present invention is further described below in conjunction with the drawings and embodiments.

[0025] See also Figure 1 , which shows a schematic cross-sectional structure diagram of a speed regulating device of an embodiment of the present invention. It should be noted that the speed regulating device in the present invention is mainly used to adjust the moving speed of the internal detector or the pig of the pipeline. In a preferred embodiment of the present invention, the speed regulating device mainly includes an execution chamber, a bypass valve and a bypass valve actuator.

[0026] Specifically, in Figure 1 In the embodiment shown, the execution chamber 1 is along Figure 1 The axial direction of the execution chamber 1 is Figure 1 The execution chamber 1 includes a drain port 11. In an optional embodiment of the present invention, the drain port 11 is disposed on the side wall 10 of the execution chamber 1, and the drain port 11 may be an annular opening, that is, Figure 1 The side wall of the execution chamber 1 is shown as a circle, but it is not limited thereto. In other embodiments of the present invention, the drain port can be any setting mode in the existing speed regulating device. Further, in the embodiment of the present invention, since the drain port 11 is set on the side wall of the execution chamber 1, the size of the drain port is preferably 3.14×d×L, where d represents the inner diameter of the execution chamber 1 of the speed regulating device, which is determined according to the specifications of the internal detector or pig of the pipeline; L represents the stroke of the hydraulic cylinder.

[0027] In an optional embodiment of the present invention, the speed regulating device further comprises an inlet 12. The inlet 12 is also arranged on the side wall 10 of the execution chamber 1. Figure 1In the embodiment shown, the inlet 12 is located on the right side of the discharge port 11. Figure 1 During the movement (in the left and right directions) of the fluid, the fluid enters the execution chamber 1 from the inlet 12 and flows out from the outlet 11.

[0028] The bypass valve 2 is disposed in the execution chamber 1 and is used to open or close the drain port 11. Figure 1 In the embodiment shown, since the drain port 11 is provided on the side wall of the execution chamber 1, the bypass valve 2 moves along the axial direction of the execution chamber 1 to open or close the drain port 11. Specifically, in this embodiment, the bypass valve 2 includes an annular baffle 21 and a support plate 22. The annular baffle 21 is close to the inner wall of the execution chamber 1 (the inner surface of the side wall 10), and when the bypass valve 2 moves to close the drain port 11, the annular baffle 21 covers the drain port 11. More specifically, in combination with Figure 1 As shown, when the annular baffle 21 is along Figure 1 When the annular baffle 21 moves from left to right, the opening area of ​​the drain port 11 gradually decreases, that is, the opening degree of the bypass valve 2 decreases; then, when the annular baffle 21 completely covers the drain port 11 from left to right, the bypass valve 2 closes the drain port 11. Figure 1 When the bypass valve 2 moves from right to left, the opening area of ​​the drain port 11 gradually increases, that is, the opening of the bypass valve 2 increases. The support plate 22 is connected to the annular baffle 21.

[0029] The bypass valve actuator is connected to the bypass valve 2 and controls the opening of the bypass valve 2 relative to the drain port 11. Figure 1 In the illustrated embodiment, the bypass valve actuator controls the bypass valve 2 to move along the axial direction of the execution chamber 1 to open or close the drain port 11. Specifically, the bypass valve actuator includes: a bidirectional hydraulic cylinder 61, a dual hydraulic oil pipe 62, and a micro hydraulic station 63. The micro hydraulic station 63 can select any existing micro hydraulic station, which is usually composed of components such as a motor (reversible), an oil pump, and a safety valve. The micro hydraulic station 63 is connected to the speed control unit 3 (see below), and the speed control unit controls the direction of its oil flow. The dual hydraulic oil pipe 62 is connected to the micro hydraulic station 63, and the micro hydraulic station 63 transmits power to the bidirectional hydraulic cylinder 61 through the dual hydraulic oil pipe 62. The bidirectional hydraulic cylinder 61 is connected to the micro hydraulic station 63 through the dual hydraulic oil pipe 62. Among them, the bidirectional hydraulic cylinder 61 includes a retractable end ( Figure 1 The retractable end is connected to the bypass valve 2 and can be retracted along the axial direction of the execution chamber 1 under the control of the micro hydraulic station 63 to drive the bypass valve 2 to move along the axial direction of the execution chamber 1. More specifically, Figure 1As shown, the retractable end of the two-way hydraulic cylinder 61 is fixedly connected to the support plate 22 of the bypass valve 2. The speed control unit 3 controls the forward or reverse rotation of the motor in the micro hydraulic station 63. The forward or reverse rotation of the motor in the micro hydraulic station 63 can change the oil flow direction inside the micro hydraulic station 63, thereby driving the retractable end of the two-way hydraulic cylinder 61 to retract along the axial direction of the execution chamber 1 (for example, extend when the motor rotates forward, and retract when it rotates reversely). Then, the retractable end drives the movement of the entire bypass valve 2 (including the annular baffle 21) through the support plate 22, thereby realizing the opening control of the bypass valve 2.

[0030] The speed control unit 3 controls the bypass valve actuator to adjust the opening of the bypass valve 2 according to the detected real-time speed. Optionally, the speed control unit 3 can be composed of a single-chip microcomputer (MCU chip). The speed control unit 3 controls the opening of the bypass valve 2 relative to the drain port 11 according to the detected real-time speed (which can be detected by a speed detection device, see below). Specifically, as described above, Figure 1 In the embodiment shown, the speed control unit 3 controls the bypass valve actuator to drive the bypass valve 2 to move along the axial direction of the execution chamber 1. The speed control unit 3 makes a judgment based on the real-time speed detected, specifically:

[0031] When the detected real-time speed is less than the first threshold speed, the bypass valve actuator is controlled to drive the bypass valve 2 to reduce the opening relative to the drain port 11. That is, the bypass valve 2 is driven to close the drain port 11 (i.e. Figure 1 The bypass valve 2 is moved from left to right in the pipeline to reduce the opening of the bypass valve 2 and increase the moving speed of the internal detector or pig in the pipeline.

[0032] When the detected real-time speed is greater than the second threshold speed, the bypass valve actuator is controlled to drive the bypass valve 2 to increase the opening relative to the drain port 11. That is, the bypass valve 2 is driven to open the drain port 11 (i.e. Figure 1 The second threshold speed is moved from right to left in the pipeline to increase the opening of the bypass valve 2 and reduce the moving speed of the internal detector or the pig in the pipeline. The second threshold speed is greater than the first threshold speed.

[0033] In an optional embodiment of the present invention, the first threshold speed and the second threshold speed can be set according to a reference speed. The reference speed can be the optimal moving speed of the internal detector or the pig of the pipeline. When the speed control unit 3 controls the bypass valve actuator to drive the bypass valve 2 to move until the moving speed of the internal detector or the pig of the pipeline reaches the reference speed. For example, the first threshold speed can be 10% lower than the reference speed, and the second threshold speed can be 10% higher than the reference speed. The reference speed can be, for example, the optimal moving speed of 2m / s described in the background technology. When the reference speed is 2m / s, the first threshold speed can be, for example, 1.8m / s, and the second threshold speed can be 2.2m / s, which will not be repeated here.

[0034] Further, in Figure 1 In the illustrated embodiment, the speed regulating device further comprises a limit detection unit. The limit detection unit is arranged in the execution chamber 1 and detects the opening of the bypass valve 2. The speed control unit 3 also receives the opening information of the bypass valve 2 detected by the limit detection unit.

[0035] Then, the judgment is made based on the real-time speed and the opening information of the bypass valve 2, specifically:

[0036] When the speed control unit 3 receives the opening information that the opening of the bypass valve 2 is 100%, and the detected real-time speed is greater than the second threshold value, the speed control unit 3 sends a command to the bypass valve actuator to stop driving the bypass valve 2. In this state, since the opening of the bypass valve 2 is 100%, that is, the opening area of ​​the drain port 11 is the largest, even if the bypass valve actuator continues to be controlled, the speed of the internal detector or the pig in the pipeline cannot be further reduced. In this case, the bypass valve actuator stops driving the bypass valve 2. In other words, the bypass valve actuator is put in a "resting" state, saving electric energy.

[0037] Similarly, when the speed control unit 3 receives the opening information that the opening of the bypass valve 2 is 0, and the detected real-time speed is less than the first threshold, the speed control unit 3 sends a command to the bypass valve actuator to stop driving the bypass valve 2. In this state, since the opening of the bypass valve 2 is 0, that is, the opening area of ​​the drain port 11 is the smallest, even if the bypass valve actuator continues to be controlled, the speed of the internal detector or the pig in the pipeline cannot be further increased. In this case, the bypass valve actuator stops driving the bypass valve 2. In other words, the bypass valve actuator is put in a "resting" state, saving electric energy.

[0038] In the embodiments of the present invention, since the speed control device is often in a strong magnetic environment for magnetic leakage detection in the pipeline, in order to avoid the problem of being easily disturbed by strong magnetic fields in the method of measuring the magnetic field strength to calculate the opening size of the bypass valve, a limit detection unit is adopted. The speed control unit makes a judgment based on the above-mentioned real-time speed and the opening information of the bypass valve, and simplifies the calculated analog quantity into a switching quantity. Compared with the prior art in which the bypass valve opening is only calculated based on the magnetic field and then set, it is more reliable and better realizes the control of the bypass valve.

[0039] Specifically, in Figure 1In the illustrated embodiment, the limit detection unit includes a position sensor rod 41, a first limit measurement device 42, and a second limit measurement device 43. The position sensor rod 41 is arranged in the execution chamber 1 along the axial direction of the execution chamber 1. The first limit measurement device 42 is arranged on the position sensor rod 41, corresponding to the maximum opening position of the bypass valve 2, and outputs a corresponding level according to its distance relative to the bypass valve 2. The second limit measurement device 43 is arranged on the position sensor rod 41, corresponding to the minimum opening position of the bypass valve 2, and outputs a corresponding level according to its distance relative to the bypass valve 2. The speed control unit 3 determines the switch state of the bypass valve 2 by detecting the levels output by the first limit measurement device 42 and the second limit measurement device 43. More specifically, in one embodiment of the present invention, a permanent magnet can be arranged on the support plate 22 of the bypass valve 2, and the first limit measurement device 42 and the second limit measurement device 43 can both be sensors. When the permanent magnet is located at the position closest to the sensor during its movement, the sensor outputs a first level through its comparator; when the permanent magnet is far away from the sensor, the sensor outputs a second level (the second level can be less than the first level) through the comparator, and the speed control unit 3 determines the current switch state of the bypass valve 2 through the levels output by the first limit measuring device 42 and the second limit measuring device 43. For further example, when the permanent magnet of the bypass valve 2 is located at the position closest to the sensor as the first limit measuring device 42, the first limit measuring device 42 outputs a high level, at this time, the speed control unit 3 can judge that the bypass valve 2 is in the state of maximum opening according to the high level output by the first limit measuring device 42; when the permanent magnet of the bypass valve 2 is far away from the sensor as the first limit measuring device 42, the first limit measuring device 42 outputs a low level, at this time, the speed control unit 3 can judge that the bypass valve 2 is in the state of reduced opening according to the low level output by the first limit measuring device 42; when the permanent magnet of the bypass valve 2 is located at the position closest to the sensor as the second limit measuring device 43, the first limit measuring device 42 outputs a low level, at this time, the speed control unit 3 can judge that the bypass valve 2 is in the state of reduced opening according to the low level output by the first limit measuring device 42; when the permanent magnet of the bypass valve 2 is located at the position closest to the sensor as the second limit measuring device When the sensor of the measuring device 43 is at its closest position, the second limit measuring device 43 outputs a high level (which may be different from the low level output by the first limit measuring device 42). At this time, the speed control unit 3 can judge that the bypass valve 2 is in a state of minimum opening according to the high level output by the second limit measuring device 43; when the permanent magnet of the bypass valve 2 is away from the sensor serving as the second limit measuring device 43, the second limit measuring device 43 outputs a low level (which may be different from the low level output by the second limit measuring device 43). At this time, the speed control unit 3 can judge that the bypass valve 2 is in a state of increasing opening according to the low level output by the second limit measuring device 43.

[0040] Further, in Figure 1 In the embodiment shown, the speed regulating device further comprises a power chamber 5 and a power unit 7. The power chamber 5 is fixed to one of the two ends of the execution chamber 1 along its axial direction ( Figure 1The right end of the execution chamber 1 is shown in the figure). Optionally, the power unit 7 is a battery or a battery pack. The speed control unit 3, the power unit 7 and the micro hydraulic station 63 are all arranged in the power chamber 5. The bidirectional hydraulic cylinder 61 is arranged in the execution chamber 1 and is fixed to one end of the execution chamber 1 close to the power chamber 5 (i.e. Figure 1 The double hydraulic oil pipe 62 is arranged between the execution chamber 1 and the power chamber 5, one end of which extends into the execution chamber 1 to connect with the bidirectional hydraulic cylinder 61, and the other end extends into the power chamber 5 to connect with the micro hydraulic station 63. In the embodiment of the present invention, since the speed control unit 3, the power unit 7 and the micro hydraulic station 63 are all arranged in the power chamber 5, the related electrical components (such as the motor and battery of the micro hydraulic station 63) are prevented from directly contacting the medium in the pipeline, thereby improving reliability.

[0041] For further information, see Figure 2 , which shows a schematic diagram of the structure of a speed control system of an embodiment of the present invention. Specifically, the present invention also provides a speed control system. The speed control system includes the above Figure 1 The speed regulating device in.

[0042] Further, in Figure 2 In the embodiment shown, the speed control system further includes a speed measuring device. The speed measuring device is connected to the above Figure 1 The speed regulating device in the pipeline is used to detect the real-time speed of the internal detector or pig in the pipeline. Figure 1 As shown, in one embodiment of the present invention, the end of the power chamber 5 away from the execution chamber 1 ( Figure 1 The right end of the speed regulating device is also provided with an interface unit, which is used for debugging, charging, switching, and connecting with components such as a speed measuring device and a status display unit (see below). The speed measuring device can be connected with the speed regulating device through an analog-to-digital conversion circuit, and it can be any speed measuring device in an existing internal detector or pig used in a pipeline, which will not be described in detail here.

[0043] Further, in Figure 2 In the embodiment shown, the speed control system further comprises a status display unit. The status display unit is connected to the speed regulating device and is used to display the status of the speed regulation. For example, the status display unit can display the following states:

[0044] 1. When the speed is lower than the reference speed, it indicates that the bypass valve is in the closing process;

[0045] 2. When the speed is lower than the reference speed and the bypass valve opening is 0, the actuator is displayed as "resting";

[0046] 3. When the speed is higher than the reference speed, it shows that the bypass valve is in the process of opening;

[0047] 4. When the speed is higher than the reference speed and the bypass valve opening is 100%, the actuator is displayed as “resting”.

[0048] In summary, in the speed control device and the speed control system having the speed control device provided by the embodiment of the present invention, the speed control unit controls the bypass valve actuator according to the real-time speed by setting the speed control unit. In addition, the speed control device is also provided with a limit detection unit, which simplifies the calculated analog quantity into a switch quantity to detect the opening of the bypass valve, and controls the bypass valve actuator according to the judgment (double limit detection) of the real-time speed and the opening information of the bypass valve, which can not only make the bypass valve actuator in most cases in a "resting" state and save electric energy, but also more reliable than the prior art that only calculates the bypass valve opening according to the magnetic field and then sets it, therefore, the requirements for users are low, the adaptability of the speed control device is improved, and the adjustable speed range is large. In addition, a drain port is arranged on the side wall of the execution chamber of the speed control device, and the bypass valve can move along the axial direction of the execution chamber (that is, a "straight-line travel" design is adopted) to open or close the drain port. Compared with the bypass valve in the existing speed control device with a rotary switch, its structure is simpler and has smaller operating resistance. The drain port is larger in size, has a larger discharge area, and has a wider range of adaptability.

[0049] Although the present invention has been disclosed as above with optional embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A speed regulating device for regulating the moving speed of an internal detector or a pipe cleaner in a pipeline, characterized in that: The speed regulating device comprises: an execution chamber, the execution chamber comprising a drain port; A bypass valve, the bypass valve is arranged in the execution chamber and is used to open or close the drain port; a bypass valve actuator, the bypass valve actuator being connected to the bypass valve and controlling the opening of the bypass valve relative to the drain port; A speed control unit, wherein the speed control unit controls the bypass valve actuator to adjust the opening of the bypass valve according to the detected real-time speed; When the detected real-time speed is less than a first threshold speed, the bypass valve actuator is controlled to drive the bypass valve to reduce the opening relative to the drain port; When the detected real-time speed is greater than a second threshold speed, the bypass valve actuator is controlled to drive the bypass valve to increase the opening relative to the drain port, and the second threshold speed is greater than the first threshold speed; the speed regulating device further includes a limit detection unit, which is arranged in the execution chamber to detect the opening of the bypass valve; The limit detection unit comprises: A position sensor rod is arranged in the execution chamber along the axial direction of the execution chamber; a first limit measuring device, which is disposed on the position sensor rod and corresponds to the maximum opening position of the bypass valve, and outputs a corresponding level according to its distance relative to the bypass valve; and a second limit measuring device, which is arranged on the position sensor rod, is located at the minimum opening position of the bypass valve, and outputs a corresponding level according to its distance relative to the bypass valve; The speed control unit determines the switch state of the bypass valve by detecting the levels output by the first limit measuring device and the second limit measuring device.

2. The speed regulating device according to claim 1, characterized in that: The speed control unit receives the opening information of the bypass valve detected by the limit detection unit; When the opening information received by the speed control unit indicates that the opening of the bypass valve is 100%, and the detected real-time speed is greater than a second threshold, the speed control unit sends an instruction to the bypass valve actuator to stop driving the bypass valve; When the opening information received by the speed control unit indicates that the opening of the bypass valve is 0 and the detected real-time speed is less than a first threshold, the speed control unit sends a command to the bypass valve actuator to stop driving the bypass valve.

3. The speed regulating device according to claim 2, characterized in that: The drain port is arranged on the side wall of the execution chamber, and the bypass valve can move along the axial direction of the execution chamber to open or close the drain port; When the detected real-time speed is less than the first threshold speed, the speed control unit controls the bypass valve actuator to drive the bypass valve to move in a direction of closing the drain port to reduce the opening of the bypass valve; When the detected real-time speed is greater than the second threshold speed, the speed control unit controls the bypass valve actuator to drive the bypass valve to move in a direction of opening the drain port.

4. The speed regulating device according to claim 3, characterized in that: The bypass valve actuator comprises: A micro hydraulic station connected to the speed control unit and having its oil flow direction controlled by the speed control unit; Dual hydraulic oil pipes, connected to the micro hydraulic station; A bidirectional hydraulic cylinder is connected to the micro hydraulic station through the dual hydraulic oil pipes. The bidirectional hydraulic cylinder includes a retractable end, which is connected to the bypass valve and can be retracted and extended along the axial direction of the execution chamber under the control of the micro hydraulic station to drive the bypass valve to move along the axial direction of the execution chamber.

5. The speed regulating device according to claim 4, characterized in that: The speed control device also includes a power unit and a power chamber, wherein the power chamber is fixed to one of the two ends of the execution chamber along its axial direction, wherein the speed control unit, the power unit and the micro hydraulic station are all arranged in the power chamber; the bidirectional hydraulic cylinder is arranged in the execution chamber and fixed to one end of the execution chamber close to the power chamber; the dual hydraulic oil pipe is arranged between the execution chamber and the power chamber, one end of which extends into the execution chamber to connect with the bidirectional hydraulic cylinder, and the other end extends into the power chamber to connect with the micro hydraulic station.

6. The speed regulating device according to claim 4, characterized in that: The bypass valve comprises: an annular baffle, the annular baffle being close to the inner wall of the execution chamber and covering the leakage port when the bypass valve moves to close the leakage port; and A support plate is connected inside the annular baffle, wherein the telescopic end of the bidirectional hydraulic cylinder is connected to the support plate to drive the bypass valve to move along the axial direction of the execution chamber.

7. The speed regulating device according to claim 1, characterized in that: The speed regulating device further comprises an inlet, and the inlet is arranged on the side wall of the execution chamber.

8. A speed control system, characterized in that: The speed control system comprises a speed regulating device according to any one of claims 1 to 7.

9. The speed control system according to claim 8, characterized in that: The speed control system also includes a speed measuring device, which is connected to the speed regulating device and is used to detect the real-time speed of the internal detector or the pig in the pipeline and feed the detected real-time speed back to the speed control unit of the speed regulating device.

10. The speed control system according to claim 9, characterized in that: The speed control system further comprises a status display unit, which is connected to the speed regulating device and is used to display the status of speed regulation.

Images