Pipeline on-off control device

Abstract

The invention discloses a pipeline on-off control device which is used for controlling on-off of a pipeline, when the pipeline needs to be opened or closed, a hydraulic system controls a hydraulic telescopic mechanism to contract so as to drive a valve element to contract and remove sealing of a valve body, then a hydraulic motor controls the valve element to move forwards or backwards, and when the valve element moves in place, the valve element is closed. And the hydraulic telescopic mechanism is controlled by the hydraulic system to extend so as to drive the core to expand and seal the valve body, so that a medium in the pipeline is prevented from leaking through a gap between the valve core and the valve body, and the switching of the pipeline on-off control device between an opening state and a closing state is realized. According to the pipeline on-off control device, movement of the valve element and sealing of the valve body are controlled through the hydraulic system, the situation that when sealing of the valve body is relieved or the valve body is sealed through manual operation, substances in the pipeline overflow, and the human health is affected is avoided, operation is easy and fast, potential safety hazards do not exist, and safe and efficient pipeline on-off control is achieved.

Description

Technical Field

[0001] The present invention relates to valve The technical field relates particularly to a pipeline on-off control device. Background Art

[0002] Spectacle valves, also known as fan-shaped blind plate valves and flap valves, are widely used in gas medium pipeline systems in mining, metallurgy, municipal administration, environmental protection and other industries, especially for absolute cutting off of toxic, harmful and flammable gases.

[0003] Since the cut-off characteristic of the glasses valve is that the valve plate enters and exits the valve body to open or close the glasses valve, the existing technology uses manual operation to seal and loosen the valve plate and the valve body, which is inconvenient to operate and has great safety hazards. Summary of the invention

[0004] In view of the above problems, the present application is proposed to provide a pipeline on-off control device that overcomes the above problems or at least partially solves the above problems.

[0005] The present application provides a pipeline on-off control device, comprising:

[0006] Including: valve body, valve core, hydraulic telescopic mechanism, hydraulic motor, hydraulic system;

[0007] The valve body has a channel and a slide groove perpendicular to the channel;

[0008] The valve core is inserted into the slide groove;

[0009] The hydraulic expansion and contraction mechanism is connected to the valve core and is used to drive the valve core to expand when extending so as to seal the valve body, or to drive the valve core to contract when contracting so as to release the seal of the valve body;

[0010] The output shaft of the hydraulic motor is in driving connection with the valve core, and is used to drive the valve core to move forward in the slide groove in forward rotation to open the hole of the valve body, or to drive the valve core to move backward in the slide groove in reverse rotation to block the hole of the valve body;

[0011] The hydraulic system is connected to the hydraulic motor and the hydraulic telescopic mechanism, and is used to control the forward or reverse rotation of the hydraulic motor, and control the extension or contraction of the hydraulic telescopic mechanism.

[0012] Optionally, the hydraulic system includes: an oil source, an oil supply pipe, an oil return pipe, a first reversing valve, a second reversing valve, and a controller;

[0013] The outlet of the oil source is connected to the inlet of the oil supply pipe, and the inlet of the oil source is connected to the outlet of the oil return pipe;

[0014] The first reversing valve comprises a first oil inlet, a first oil return port, a first working oil port, and a second working oil port, wherein the first oil inlet is connected to the outlet of the oil supply pipe, the first oil return port is connected to the inlet of the oil return pipe, the first working oil port is connected to the forward interface pipeline of the hydraulic motor, and the second working oil port is connected to the reverse interface pipeline of the hydraulic motor;

[0015] The second reversing valve comprises a second oil inlet, a second oil return port, a third working oil port, and a fourth working oil port, wherein the second oil inlet is connected to the outlet of the oil supply pipe, the second oil return port is connected to the inlet of the oil return pipe, the third working oil port is sealed, and the fourth working oil port is connected to the hydraulic telescopic mechanism through an oil port pipeline;

[0016] The controller is electrically connected to the first reversing valve and the second reversing valve.

[0017] Optionally, controlling the hydraulic motor to rotate forward or reverse specifically includes:

[0018] The controller controls the left side of the first reversing valve to be connected, connects the first oil inlet and the first working oil port, and connects the first oil return port and the second working oil port, so that the hydraulic motor rotates forward;

[0019] The controller controls the right side of the first reversing valve to be connected, connects the first oil inlet and the second working oil port, and connects the first oil return port and the first working oil port, so as to reverse the hydraulic motor.

[0020] Optionally, controlling the hydraulic telescopic mechanism to extend or contract specifically includes:

[0021] Control the second reversing valve to lose power, connect the second oil return port and the fourth working oil port, so that the hydraulic telescopic mechanism extends;

[0022] The second reversing valve is controlled to be energized to connect the second oil inlet and the fourth working oil port, so as to shrink the hydraulic telescopic mechanism.

[0023] Optionally, it further comprises a first proximity switch, which is arranged on the valve body and is used to detect whether the valve core moves forward into position in the valve body, or to detect whether the valve core moves backward into position in the valve body;

[0024] The controller is electrically connected to the first proximity switch, and is used to control the hydraulic motor to stop running and control the hydraulic telescopic mechanism to extend when receiving a signal sent by the first proximity switch indicating that the valve core moves forward or reversely into position in the valve body.

[0025] Optionally, it further comprises a second proximity switch, which is arranged on the valve core and is used to detect whether the hydraulic telescopic mechanism is fully retracted;

[0026] The controller is electrically connected to the second proximity switch, and is used to control the hydraulic motor to rotate forward or reverse when receiving a signal from the second proximity switch indicating that the hydraulic telescopic mechanism has been retracted to a certain position.

[0027] Optionally, it also includes a pressure regulating pipe, a pressure regulating valve, a circulation pipe, and an on-off valve; the two ends of the pressure regulating pipe are respectively connected to the middle parts of the oil supply pipe and the oil return pipe, and the pressure regulating valve is arranged on the pressure regulating pipe to adjust the pressure of the pressure regulating pipe; the two ends of the circulation pipe are respectively connected to the middle parts of the oil supply pipe and the oil return pipe, and the on-off valve is arranged on the circulation pipe; the controller is electrically connected to the on-off valve and the pressure regulating valve, respectively.

[0028] Optionally, the valve core includes a frame, an orifice plate group, and a cover plate group; the frame is inserted into the slide groove of the valve body and can move in the slide groove of the valve body, and the output shaft of the hydraulic motor is drivingly connected to the frame;

[0029] The orifice plate group includes a first orifice plate, a first telescopic sleeve, and a second orifice plate connected in sequence, the inner holes of the first orifice plate, the first telescopic sleeve, and the second orifice plate are connected in sequence, and the hydraulic telescopic mechanism includes a first hydraulic cylinder group, which is connected to the first orifice plate and the second orifice plate respectively, and is used to drive the first orifice plate and the second orifice plate to move in a direction away from each other when extending, so as to drive the orifice plate group to expand, or to drive the first orifice plate and the second orifice plate to move in a direction close to each other when contracting, so as to drive the orifice plate group to contract;

[0030] The cover plate group includes a first cover plate, a second telescopic sleeve, and a second cover plate connected in sequence, and the hydraulic telescopic mechanism includes a second hydraulic cylinder group, which is respectively connected to the first cover plate and the second cover plate, and is used to drive the first cover plate and the second cover plate to move away from each other when extending, so as to drive the cover plate group to expand, or to drive the first cover plate and the second cover plate to move towards each other when contracting, so as to drive the cover plate group to contract; wherein, the first hydraulic cylinder group and the second hydraulic cylinder group are arranged in parallel.

[0031] Optionally, the first hydraulic cylinder group includes: N first hydraulic cylinders, N is a positive integer greater than or equal to 1, each of the N first hydraulic cylinders includes a first cylinder body, a first piston, a first piston rod, and a first spring, the side of the first cylinder body is connected to the frame, the outer bottom of the first cylinder body is connected to the first orifice plate, the first spring and the first piston are arranged in the inner cavity of the first cylinder body, and one end of the first spring is connected to the bottom of the inner cavity of the first cylinder body, and the other end is connected to the first piston, one end of the first piston rod is connected to the first piston, and the other end is connected to the second orifice plate;

[0032] The second hydraulic cylinder group includes: N second hydraulic cylinders, each of the N second hydraulic cylinders includes a second cylinder body, a second piston, a second piston rod, and a second spring, the side of the second cylinder body is connected to the frame, the outer bottom of the second cylinder body is connected to the first cover plate, the second spring and the second piston are arranged in the inner cavity of the second cylinder body, and one end of the second spring is connected to the bottom of the inner cavity of the second cylinder body, and the other end is connected to the second piston, one end of the second piston rod is connected to the second piston, and the other end is connected to the second cover plate.

[0033] Optionally, the N first hydraulic cylinders are connected in series in sequence, and the N second hydraulic cylinders are connected in series in sequence, and the oil port pipeline includes a first branch pipe, a second branch pipe, and a third branch pipe that are connected to each other, the first branch pipe is connected to the second working oil port of the second reversing valve, the second branch pipe is connected to the cylinder body of the first first hydraulic cylinder among the N first hydraulic cylinders, and the cylinder body of the first second hydraulic cylinder among the N second hydraulic cylinders, respectively, and the third branch pipe is connected to the cylinder body of the Nth first hydraulic cylinder among the N first hydraulic cylinders, and the cylinder body of the Nth second hydraulic cylinder among the N second hydraulic cylinders, respectively.

[0034] The technical solution provided by this application has at least the following technical effects or advantages:

[0035] The pipeline on-off control device provided by the present application is installed on the pipeline and is used to control the on-off of the pipeline. When the pipeline needs to be opened or closed, the hydraulic system is first used to control the hydraulic telescopic mechanism to contract, so as to drive the valve core to contract and release the seal of the valve body. Then, the hydraulic motor is used to control the valve core to move forward or backward. When the valve core moves into place, the hydraulic system is used to control the hydraulic telescopic mechanism to extend, so as to drive the core to expand and seal the valve body to prevent the medium in the pipeline from leaking through the gap between the valve core and the valve body, so as to realize the switching of the pipeline on-off control device between the open and closed states. The pipeline on-off control device provided by the present application controls the movement of the valve core and the seal of the valve body through the hydraulic system, so as to avoid the overflow of materials in the pipeline when the valve body seal is released or sealed by manual operation, which affects human health. The operation is simple and fast, and there is no safety hazard, so as to realize safe and efficient pipeline on-off control.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 This is a wireframe diagram of a pipeline on-off control device in an embodiment of the present application;

[0039] Figure 2 This is a front view of the valve body in the embodiment of the present application;

[0040] Figure 3 This is a side view of the valve body in the embodiment of the present application;

[0041] Figure 4 This is a front view of the valve core in the embodiment of the present application;

[0042] Figure 5 It is a side cross-sectional view of the orifice plate assembly in the embodiment of the present application;

[0043] Figure 6 This is a side cross-sectional view of the cover plate assembly in the embodiment of the present application;

[0044] Figure 7 This is a structural diagram of a pipeline on-off control device in an embodiment of the present application;

[0045] Figure 8The pipeline opening control logic in the embodiment of the present application;

[0046] Fig. 9 This is the pipeline cutting control logic in the embodiment of the present application. DETAILED DESCRIPTION

[0047] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0048] Various structural schematic diagrams according to embodiments of the present application are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0049] In order to better understand the above-mentioned technical scheme, the above-mentioned technical scheme will be described in detail below in combination with specific implementation methods. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical scheme of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0050] Glasses valve is also called fan-shaped blind plate valve, flap valve, etc. It is widely used in gas medium pipeline systems in mining, metallurgy, municipal administration, environmental protection and other industries, especially for absolute cutting off of toxic, harmful and flammable gases. The driving modes of glasses valve include manual, electric, gas or hydraulic.

[0051] Since the cut-off feature of the glasses valve requires the valve plate to enter and exit the valve body installed on the pipeline, the sealing device of the valve body needs to be clamped and loosened. At present, the driving method of the valve body seal usually adopts manual operation intervention. When the pipeline diameter is greater than 2 meters, the operation is inconvenient, and in the incompletely sealed state, the material in the pipeline overflows from the gap between the valve body and the valve plate, which poses a great safety hazard.

[0052] In view of this, the present application provides a pipeline on-off control device, please refer to Figure 1 , Figure 1 This is a wireframe diagram of a pipeline on-off control device in an embodiment of the present application. The pipeline on-off control device 100 includes: a valve body 101, a valve core 102, a hydraulic telescopic mechanism 103, a hydraulic motor 104, and a hydraulic system 105;

[0053] like Figure 2 , 3As shown, the valve body 101 has a channel 201 and a slide groove 301 perpendicular to the channel 201. The valve core 102 is inserted into the slide groove 301.

[0054] The hydraulic expansion and contraction mechanism 103 is connected to the valve core 102 and is used to drive the valve core 102 to expand when extending to seal the valve body 101, or to drive the valve core 102 to contract when contracting to release the seal of the valve body 101.

[0055] The output shaft of the hydraulic motor 104 is in transmission connection with the valve core 102, and is used to drive the valve core 102 to move forward in the slide groove 301 during forward rotation to open the channel 201 of the valve body 101, or to drive the valve core 102 to move reversely in the slide groove 301 during reverse rotation to block the channel 201 of the valve body 101.

[0056] The hydraulic system 105 is connected to the hydraulic motor 104 and the hydraulic telescopic mechanism 103 and is used to control the hydraulic motor 104 to rotate forward or reverse, and to control the hydraulic telescopic mechanism 103 to extend or retract.

[0057] The pipeline on-off control device 100 is installed on the pipeline. In the open state, the medium in the pipeline flows. When the pipeline needs to be cut off, the sealing state of the valve body 101 is first released, and the valve core 102 is controlled to move to block the hole 201 of the valve body 101, and then the valve body 101 is sealed, and the pipeline on-off control device 100 can be closed to cut off the pipeline. When the pipeline on-off control device 100 needs to be opened, the sealing state of the valve body 101 is also released first, and the valve core 102 is controlled to move to open the hole 201 of the valve body 101, and then the valve body 101 is sealed, and the pipeline on-off control device 100 can be opened, and the medium in the pipeline resumes flowing.

[0058] It is understandable that the above-mentioned pipeline on-off control device 100 method can be applied to various pipelines, such as gas medium pipelines in mining, metallurgy, municipal administration, environmental protection and other industries, and is particularly suitable for pipelines with a diameter greater than 2 meters. The embodiments of the present application do not limit the pipelines to which the pipeline on-off control device 100 is applied.

[0059] In some optional embodiments, such as Figure 4 As shown, the valve core 102 includes a frame 401 , an orifice plate group 402 , and a cover plate group 403 ; the frame 401 is inserted into the slide groove 301 of the valve body 101 and can move in the slide groove 301 of the valve body 101 , and the output shaft of the hydraulic motor 104 is transmission-connected to the frame 401 .

[0060] Exemplarily, the output shaft of the hydraulic motor 104 can be connected to the frame 401 through a sprocket and chain transmission. The sprocket is installed on the output shaft of the motor, the inner ring of the annular chain is linked to the sprocket, and the outer ring is connected to the frame 401. While the hydraulic motor 104 drives the sprocket to rotate, it drives the valve core 102 to move horizontally through the chain.

[0061] Exemplarily, the output shaft of the hydraulic motor 104 and the frame 401 can also be connected through a worm gear and a worm transmission. The worm gear is installed on the output shaft of the motor, and the two ends of the worm are rotatably connected to the frame 401 through bearings. The worm and the worm gear are adapted. While the hydraulic motor 104 drives the worm gear to rotate, it drives the valve core 102 to move horizontally through the worm gear.

[0062] It is understandable that the hydraulic motor 104 and the valve core 102 may also be connected via other transmission structures, which will not be described in detail here.

[0063] In this way, the pipeline on-off control device 100 is a glasses valve. When the hydraulic motor 104 rotates forward to drive the frame 401 to move forward to a position, the inner hole of the orifice plate group 402 is adapted to the hole 201 of the valve body 101. When the valve body 101 is in a sealed state, the medium in the pipeline passes through the hole 201 of the valve body 101 and the inner hole of the orifice plate group 402. When the hydraulic motor 104 rotates backward to drive the frame 401 to move backward to a position, the cover plate of the cover plate group 403 is adapted to the hole 201 of the valve body 101 to block the hole 201 of the valve body 101. When the valve body 101 is in a sealed state, the medium in the pipeline is cut off.

[0064] It should be noted that guide rails and guide wheels can be installed between the frame 401 and the slide groove 301 to ensure that the valve core 102 moves in the slide groove 301 without deviation. For example, guide rails and guide wheels are respectively installed between the upper end and the lower end of the frame 401 and the slide groove 301 to ensure that the valve core 102 moves in the slide groove 301 without deviation.

[0065] It is understandable that other guiding structures may be installed between the slide grooves 301 of the valve core 102 to ensure that the valve core 102 does not move in an oblique manner, which will not be described in detail here.

[0066] like Figure 5 As shown, the orifice plate group 402 includes a first orifice plate 501, a first telescopic sleeve 502, and a second orifice plate 503 connected in sequence, and the inner holes of the first orifice plate 501, the first telescopic sleeve 502, and the second orifice plate 503 are connected in sequence. The hydraulic telescopic mechanism 103 includes a first hydraulic cylinder group 504, and the first hydraulic cylinder group 504 is connected to the first orifice plate 501 and the second orifice plate 503 respectively, and is used to drive the first orifice plate 501 and the second orifice plate 503 to move away from each other when extended, so as to drive the orifice plate group 402 to expand, or to drive the first orifice plate 501 and the second orifice plate 503 to move towards each other when contracted, so as to drive the orifice plate group 402 to contract.

[0067] like Figure 6 As shown, the cover plate group 403 includes a first cover plate 601, a second telescopic sleeve 602, and a second cover plate 603 connected in sequence, and the hydraulic telescopic mechanism 103 includes a second hydraulic cylinder group 604, and the second hydraulic cylinder group 604 is respectively connected to the first cover plate 601 and the second cover plate 603, and is used to drive the first cover plate 601 and the second cover plate 603 to move away from each other when extended, so as to drive the cover plate group 403 to expand, or to drive the first cover plate 601 and the second cover plate 603 to move towards each other when contracted, so as to drive the cover plate group 403 to contract; wherein, the first hydraulic cylinder group 504 and the second hydraulic cylinder group 604 are arranged in parallel.

[0068] In some optional embodiments, such as Figure 7 As shown, the hydraulic system 105 includes: an oil source 701, an oil supply pipe 702, an oil return pipe 703, a first reversing valve 704, a second reversing valve 705, and a controller (not shown in the figure).

[0069] The outlet of the oil source 701 is connected to the inlet of the oil supply pipe 702 , and the inlet of the oil source 701 is connected to the outlet of the oil return pipe 703 .

[0070] The first reversing valve 704 includes a first oil inlet (P), a first oil return port (T), a first working oil port (A), and a second working oil port (B). The first oil inlet is connected to the outlet of the oil supply pipe 702, the first oil return port is connected to the inlet of the oil return pipe 703, the first working oil port is connected to the forward interface pipeline of the hydraulic motor 104, and the second working oil port is connected to the reverse interface pipeline of the hydraulic motor 104.

[0071] The first reversing valve 704 may be a normally closed electromagnetic reversing valve. When it is forwardly conducted, the oil supply pipe 702 and the forward interface pipeline of the hydraulic motor 104 are conducted, and the return oil pipe 703 and the reverse interface pipeline of the hydraulic motor 104 are conducted, so that the hydraulic motor 104 rotates forward; when the first reversing valve 704 is reversely conducted, the oil supply pipe 702 and the reverse interface pipeline of the hydraulic motor 104 are conducted, and the return oil pipe 703 and the forward interface pipeline of the hydraulic motor 104 are conducted, so that the hydraulic motor 104 reverses; when the first reversing valve 704 loses power, the forward interface pipeline and the reverse interface pipeline of the hydraulic motor 104 are cut off.

[0072] The second reversing valve 705 includes a second oil inlet (P), a second oil return port (T), a third working oil port (A), and a fourth working oil port (B). The second oil inlet is connected to the outlet of the oil supply pipe 702, the second oil return port is connected to the inlet of the oil return pipe 703, the third working oil port is sealed, and the fourth working oil port is connected to the hydraulic telescopic mechanism 103 through the oil port pipeline 706.

[0073] The second reversing valve 705 has a forward conducting state and a reverse conducting state. In the forward conducting state, the oil supply pipe 702 and the oil port pipeline 706 of the hydraulic telescopic mechanism 103 are connected to make the hydraulic telescopic mechanism 103 contract. In the reverse conducting state, the oil return pipe 703 and the oil port pipeline 706 of the hydraulic telescopic mechanism 103 are connected to make the hydraulic telescopic mechanism 103 extend.

[0074] The controller is electrically connected to the first reversing valve 704 and the second reversing valve 705 .

[0075] The hydraulic system 105 controls the switching of the first reversing valve 704 through the controller to control the forward or reverse rotation of the hydraulic motor 104, specifically including:

[0076] The controller controls the left side of the first reversing valve 704 to be connected, connects the first oil inlet and the first working oil port, and connects the first oil return port and the second working oil port, so that the hydraulic motor 104 rotates forward. The controller controls the right side of the first reversing valve 704 to be connected, connects the first oil inlet and the second working oil port, and connects the first oil return port and the first working oil port, so that the hydraulic motor 104 rotates reversely.

[0077] The hydraulic system 105 controls the switching of the second reversing valve 705 through the controller to control the extension or contraction of the hydraulic telescopic mechanism 103, specifically including:

[0078] The second reversing valve 705 is controlled to lose power, and the second oil return port and the fourth working oil port are connected to extend the hydraulic telescopic mechanism 103. The second reversing valve 705 is controlled to be energized, and the second oil inlet port and the fourth working oil port are connected to contract the hydraulic telescopic mechanism 103.

[0079] The hydraulic system 105 controls the switching of the first reversing valve 704 and the second reversing valve 705 through the controller to control the opening and closing of the pipeline on-off control device 100. The following is a detailed description of how the controller controls the switching of the first reversing valve 704 and the second reversing valve 705 to control the opening and closing of the pipeline on-off control device 100 in combination with an example.

[0080] When the pipeline on-off control device 100 is installed on the pipeline, when the pipeline on-off control device 100 is in the closed state, the pipeline is cut off and the medium in the pipeline cannot pass through the pipeline. When the pipeline needs to be opened for medium transmission, the control logic of the controller is as follows:

[0081] The second reversing valve 705 is controlled to be energized, and the second oil inlet and the fourth working oil port are connected (i.e., P is connected to B), so that the hydraulic telescopic mechanism 103 is contracted to release the sealing state; when the telescopic sealing mechanism is contracted to the right position, the left side of the first reversing valve 704 is controlled to be connected, and the first oil inlet and the first working oil port are connected, and the first oil return port and the second working oil port are connected (i.e., P is connected to B, T is connected to A), so that the hydraulic motor 104 rotates forward, the valve core 102 moves forward, the cover plate group 403 leaves the valve body 101, and the orifice plate group 402 enters the valve body 101; when the valve core 1 When 02 moves forward to its position, that is, the valve body 101 is opened to its position, the inner hole of the orifice group 402 is matched with the channel 201 of the valve body 101, and the first reversing valve 704 is controlled to lose power to stop the hydraulic motor 104 from running and the valve core 102 from moving. At the same time, the second reversing valve 705 is controlled to lose power (that is, P is connected to A, T is connected to B), and the second oil return port and the fourth working oil port are connected to extend the telescopic sealing mechanism, and the orifice group 402 is expanded to be tightly against the valve body 101, thereby sealing the valve body 101. At this time, the pipeline on-off control device 100 is opened, and the pipeline is opened.

[0082] When it is necessary to close the pipeline to cut off the medium transmission, the control logic of the controller is as follows:

[0083] The second reversing valve 705 is controlled to be energized, and the second oil inlet and the fourth working oil port are connected (i.e., P is connected to B, T is connected to A), so that the hydraulic telescopic mechanism 103 is contracted to release the sealing state; when the telescopic sealing mechanism is contracted to the right, the right side of the first reversing valve 704 is controlled to be connected, and the first oil inlet and the second working oil port are connected, and the first oil return port and the first working oil port are connected (i.e., P is connected to A, T is connected to B), so that the hydraulic motor 104 is reversed, and the valve core 102 is moved in the opposite direction, so that the orifice plate group 402 leaves the valve body 101, and the cover plate group 403 enters the valve body 101; when the valve When the core 102 moves in the reverse direction and reaches its position, that is, the valve body 101 is closed in place, the cover plate of the cover plate group 403 is matched with the channel 201 of the valve body 101, and the first reversing valve 704 is controlled to lose power to stop the hydraulic motor 104 from running and the valve core 102 from moving. At the same time, the second reversing valve 705 is controlled to lose power (that is, P is connected to A, T is connected to B), and the second oil return port and the fourth working oil port are connected to extend the telescopic sealing mechanism, and the cover plate group 403 is expanded to be tightly against the valve body 101, thereby sealing the valve body 101. At this time, the pipeline on-off control device 100 is closed and the pipeline is cut off.

[0084] It is understandable that when the pipeline on-off control device 100 is in the open or closed state, continuous sealing is required to prevent leakage of the medium in the pipeline, and the first hydraulic cylinder and the second hydraulic cylinder of the hydraulic telescopic mechanism 103 adopt a specific structure of contraction with oil and extension without oil. In order to ensure the continuous extension of the hydraulic telescopic mechanism 103, the second reversing valve 705 remains in a de-energized state, and is only powered when the valve core 102 is switched, that is, when the pipeline is opened or closed, to supply oil to the hydraulic telescopic mechanism 103 for contraction.

[0085] In order to prevent the sealing valve core 102 from being damaged during movement, the sealing of the valve body 101 must be released before the valve core 102 can be moved.

[0086] In some optional embodiments, Figure 1 As shown, the pipeline on-off control device 100 also includes an upper proximity switch 106, which is arranged on the valve body 101 and is used to detect whether the valve core 102 moves forward to its position in the valve body 101, or to detect whether the valve core 102 moves backward to its position in the valve body 101.

[0087] The controller is electrically connected to the upper proximity switch 106, and is used to control the hydraulic motor 104 to stop running and control the hydraulic telescopic mechanism 103 to extend when receiving a signal sent by the upper proximity switch 106 that the valve core 102 moves forward or reversely into position in the valve body 101.

[0088] When the second reversing valve 705 is energized and the valve body 101 is in an unsealed state, there is a gap between the valve core 102 and the valve body 101 and there is no friction, so the valve core 102 can move very conveniently. When the controller receives the signal sent by the upper proximity switch 106 that the valve core 102 moves forward or reversely into position in the valve body 101, the controller controls the first reversing valve 704 and the second reversing valve 705 to lose power to stop the valve core 102 from moving and the hydraulic telescopic mechanism 103 extends to seal the valve body 101.

[0089] In some optional embodiments, Figure 7 As shown, the first hydraulic cylinder group 504 includes: N first hydraulic cylinders, where N is a positive integer greater than or equal to 1. For example, there may be 3 first hydraulic cylinders. Figure 7 As shown, each of the three first hydraulic cylinders includes a first cylinder body, a first piston, a first piston rod, and a first spring. The side of the first cylinder body is connected to the frame 401, the outer bottom of the first cylinder body is connected to the first orifice plate 501, the first spring and the first piston are arranged in the inner cavity of the first cylinder body, and one end of the first spring is connected to the bottom of the inner cavity of the first cylinder body, and the other end is connected to the first piston, and one end of the first piston rod is connected to the first piston, and the other end is connected to the second orifice plate 503.

[0090] When the N first cylinder bodies are extended, the first orifice plate 501 and the second orifice plate 503 are pushed away from each other until the first orifice plate 501 and the second orifice plate 503 are respectively pressed against the valve body 101 to seal the valve body 101. When the N first cylinder bodies are contracted, the first orifice plate 501 and the second orifice plate 503 are pulled back toward each other to release the seal of the valve body 101.

[0091] Still Figure 7 As shown, the second hydraulic cylinder group 604 includes: N second hydraulic cylinders, each of the N second hydraulic cylinders includes a second cylinder body, a second piston, a second piston rod, a second spring, a second spring, a side of the second cylinder body is connected to the frame 401, the outer bottom of the second cylinder body is connected to the first cover plate 601, the second spring and the second piston are arranged in the inner cavity of the second cylinder body, and one end of the second spring is connected to the bottom of the inner cavity of the valve body 101, and the other end is connected to the second piston, one end of the second piston rod is connected to the second piston, and the other end is connected to the second cover plate 603.

[0092] When the N second cylinders are extended, the first cover plate 601 and the second cover plate 603 are pushed away from each other until the first cover plate 601 and the second cover plate 603 are respectively pressed against the valve body 101 to seal the valve body 101. When the N second cylinders are contracted, the first cover plate 601 and the second cover plate 603 are pulled back to the direction of approaching each other to release the sealing of the valve body 101.

[0093] In some optional embodiments, Figure 1 As shown, the pipeline on-off control device 100 also includes a second proximity switch 107, which is arranged on the valve core 102 and is used to detect whether the hydraulic telescopic mechanism 103 is retracted to the right position.

[0094] The controller is electrically connected to the second proximity switch 107, and is used to control the hydraulic motor 104 to rotate forward or reverse when receiving the signal from the second proximity switch 107 that the hydraulic telescopic mechanism 103 is retracted to the position. The specific operation is that when the second reversing valve 705 loses power, the valve body 101 is in a sealed state, there is no gap between the valve core 102 and the valve body 101, the resistance is large, and the valve core 102 is difficult to move. Therefore, when the valve core 102 is retracted to the position and there is no resistance between the valve body 101, the hydraulic motor 104 is controlled to rotate forward or reverse to facilitate the movement of the valve core 102.

[0095] It is understandable that when the controller receives the signal sent by the second proximity switch 107 that the hydraulic telescopic mechanism 103 is retracted into place, the second reversing valve 705 needs to remain energized while controlling the forward or reverse rotation of the hydraulic motor 104, that is, the valve core 102 needs to remain in a retracted state until the valve core 102 moves into place. If the second reversing valve 705 loses power while the valve core 102 has not moved into place, the valve core 102 will expand to clamp the valve body 101 when the orifice plate group 402 or the cover plate group 403 is not aligned with the channel 201 of the valve body 101, and the pipeline cannot be fully opened or cut off.

[0096] When the valve core 102 moves to the right position and expands to the right position, there will be feedback signals from the proximity switch, and the signals are fed back to the controller. The controller controls the opening, closing, and sealing actions and sequences of the pipeline on-off control device 100 according to the signals.

[0097] In some optional embodiments, Figure 7 As shown, the N first hydraulic cylinders in the first hydraulic cylinder group 504 are connected in series in sequence, and the N second hydraulic cylinders in the second hydraulic cylinder group 604 are connected in series in sequence. The oil port pipeline 706 for supplying oil to the first hydraulic cylinder group 504 and the second hydraulic cylinder group 604 includes a first branch pipe, a second branch pipe, and a third branch pipe that are connected. The first branch pipe is connected to the second working oil port (B) of the second reversing valve 705, the second branch pipe is connected to the cylinder body of the first first hydraulic cylinder among the N first hydraulic cylinders, and the cylinder body of the first second hydraulic cylinder among the N second hydraulic cylinders, respectively, and the third branch pipe is connected to the cylinder body of the Nth first hydraulic cylinder among the N first hydraulic cylinders, and the cylinder body of the Nth second hydraulic cylinder among the N second hydraulic cylinders, respectively.

[0098] The first hydraulic cylinder and the second hydraulic cylinder can be single-acting hydraulic cylinders. Multiple single-acting hydraulic cylinders can achieve the sealing of the joint between the pipeline on-off control device 100 and the pipeline by controlling the sealing between the valve core 102 and the valve body 101. The hydraulic cylinder seals when it is extended and releases the seal when it is retracted.

[0099] The second reversing valve 705 controls the first hydraulic cylinder group 504 and the second hydraulic cylinder group 604 to contract and extend synchronously, so as to facilitate the movement of the valve core 102 and the sealing of the valve body 101 .

[0100] In some optional embodiments, a solenoid valve is provided on the oil port pipeline 706 for supplying oil to the first hydraulic cylinder group 504 and the second hydraulic cylinder group 604 and is controlled by a controller. When the valve body 101 is in a sealed state, the oil port pipeline 706 is cut off by the solenoid valve to prevent abnormal oil supply to the oil port pipeline 706 and the release of the valve body 101 seal, thereby causing medium leakage.

[0101] For example, Figure 7As shown, a first solenoid valve 707 is provided on the second branch pipe, and a second solenoid valve 708 is provided on the third branch pipe. The controller is electrically connected to the first solenoid valve 707 and the second solenoid valve 708 to control the on and off of the first solenoid valve 707 and the second solenoid valve 708. The first solenoid valve 707 and the second solenoid valve 708 can be pilot operated solenoid valves, which are closed in a power-off state. When the valve body 101 needs to release the seal, the first solenoid valve 707 and the second solenoid valve 708 are controlled to be powered on to open, so as to conduct the second branch pipe and the third branch pipe, so that the oil in the oil supply pipe 702 can supply oil to the first hydraulic cylinder group 504 and the second hydraulic cylinder group 604 through the second branch pipe and the third branch pipe. When it is necessary to seal the valve body 101, the second reversing valve 705 is controlled to lose power. Under the action of the first spring and the second spring, the oil in the first hydraulic cylinder group 504 and the second hydraulic cylinder group 604 returns to the oil return pipe 703 through the second branch pipe and the third branch pipe, and then the first solenoid valve 707 and the second solenoid valve 708 are controlled to be closed to avoid abnormal oil supply causing the valve body 101 to be poorly sealed.

[0102] In some optional embodiments, Figure 1 As shown, the pipeline on-off control device 100 also includes a pressure regulating pipe 709 and a pressure regulating valve 710. The two ends of the pressure regulating pipe 709 are respectively connected to the middle of the oil supply pipe 702 and the oil return pipe 703. The pressure regulating valve 710 is arranged on the pressure regulating pipe 709 to adjust the pressure of the pressure regulating pipe 709. The controller is electrically connected to the pressure regulating valve 710 to control the second reversing valve 705 to be energized when receiving a signal sent by the pressure regulating valve 710 that the pressure of the pressure regulating pipe 709 reaches a set oil pressure threshold.

[0103] It is understandable that an oil pump 711 and a motor drive oil transmission need to be arranged on the pipeline of the hydraulic system 105. Usually, the oil pump 711 can be arranged on the oil supply pipe 702. The output end of the motor is connected to the oil pump 711 in a transmission manner to drive the oil pump 711 to operate. The controller is electrically connected to the motor to control the motor to start or stop. During the period when the pipeline on-off control device 100 is in an open or closed state, the first reversing valve 704 and the second reversing valve 705 are both in a power-off state, and the oil pressure in the oil pipeline of the entire hydraulic system 105 drops to a very low level. When the state of the pipeline on-off control device 100 needs to be switched, the hydraulic system 105 is started to supply oil, that is, after the motor is started to drive the oil pump 711 to operate, before the first reversing valve 704 and the second reversing valve 705 are controlled to be powered, the oil pressure in the oil supply pipe 702 and the return pipe 703 of the entire hydraulic system 105 needs to be adjusted to be stable, otherwise the unstable oil pressure will cause abnormal operation of the hydraulic motor 104 and the hydraulic telescopic mechanism 103.

[0104] In some optional embodiments, Figure 7As shown, the pipeline on-off control device 100 also includes a circulation pipe 712 and an on-off valve 713. The two ends of the circulation pipe 712 are respectively connected to the middle of the oil supply pipe 702 and the oil return pipe 703. The on-off valve 713 is arranged on the circulation pipe 712; the controller is electrically connected to the on-off valve 713 for controlling the on-off of the on-off valve 713.

[0105] When the state of the pipeline on-off control device 100 needs to be switched, the controller controls the hydraulic system 105 to start, that is, when the motor is started, the oil pump 711 is unloaded and started. Therefore, the on-off valve 713 is also controlled to be energized to open the circulation pipe 712 to increase the pressure of the oil pump 711.

[0106] It is understandable that if Figure 2 As shown, a one-way valve 714 is also provided on the oil supply pipe 702 to prevent the oil from flowing back into the oil pump 711 when the motor stops, thereby damaging the parts of the oil pump 711.

[0107] It is understandable that a control box can be set up on-site or remotely, and when the pipeline on-off control device 100 needs to be activated, all actions can be completed by pressing the open or close button. This provides a safer and more efficient solution for the opening, closing and sealing operation of the blind plate valve of a large-diameter pipeline.

[0108] The following takes setting the oil pressure threshold to 140 bar as an example to introduce how to execute the state switching of the pipeline on-off control device 100 through the hydraulic system 105 .

[0109] In the first case, the disconnected pipeline needs to be opened to conduct the medium. At this time, the pipeline on-off control device 100 in the closed state needs to be switched to the open state. The specific operation is as follows: Figure 8 shown.

[0110] The operator presses the open button on the operating table, and the controller receives the open signal, controls the motor to start, and the one-way valve 714 is energized and turned on. The oil pump 711 drives the oil in the oil supply pipe 702 to return to the return oil pipe 703 through the circulation pipe 712 and the pressure regulating pipe 709, and the oil pressure of the pressure regulating pipe 709 is adjusted by the pressure regulating valve 710. When the pressure regulating valve 710 detects that the pressure in the pressure regulating pipe 709 reaches the set 140 bar, it sends a signal to the controller. After the controller receives the signal that the oil pressure reaches 140 bar, it controls the second reversing valve 705 to be energized, and the controller receives the signal that the seal of the valve body 101 is released. When the controller receives a signal that the valve body 101 is opened (i.e., a signal that the valve core 102 is contracted to its position), the left side of the first reversing valve 704 is controlled to be electrically connected to open the channel 201 of the valve body 101. When the controller receives a signal that the valve body 101 is opened (i.e., a signal that the valve core 102 is moved forward to its position), the second reversing valve 705 is controlled to lose power to restore the seal. When the controller receives a signal that the seal is restored (i.e., a signal that the valve core 102 is extended to its position), it is determined that the pipeline on-off control device 100 is switched from the closed state to the open state. The first reversing valve 704 and the second reversing valve 705 are controlled to lose power, the hydraulic system 105 is closed, and the state switching harness is switched.

[0111] In the second case, the open pipeline needs to be disconnected to cut off the medium. At this time, the pipeline on-off control device 100 in the open state needs to be switched to the closed state. The specific operation is as follows: Fig. 9 shown.

[0112] The operator presses the closing button on the operating table, and the controller receives the closing signal, controls the motor to start, and the one-way valve 714 is opened. The oil pump 711 drives the oil in the oil supply pipe 702 to return to the oil return pipe 703 through the circulation pipe 712 and the pressure regulating pipe 709, and the oil pressure of the pressure regulating pipe 709 is adjusted by the pressure regulating valve 710. When the pressure regulating valve 710 detects that the oil pressure reaches the set 140 bar, it sends a signal to the controller. After the controller receives the signal that the oil pressure reaches 140 bar, it controls the second reversing valve 705 to be energized, and the controller receives the signal that the seal of the valve body 101 is released (that is, the valve core 1 02 is contracted to the full position), the right side of the first reversing valve 704 is controlled to be electrically connected to close the channel 201 of the valve body 101. When the controller receives the signal that the valve body 101 is opened to the full position (i.e. the signal that the valve core 102 moves in the opposite direction to the full position), the second reversing valve 705 is controlled to be de-energized to restore the seal; when the controller receives the signal that the seal is restored (i.e. the signal that the valve core 102 is extended to the full position), it is determined that the pipeline on-off control device 100 is switched from the open state to the closed state, and the first reversing valve 704 and the second reversing valve 705 are controlled to be de-energized, the hydraulic system 105 is closed, and the state switching harness is switched.

[0113] The pipeline on-off control device provided in the embodiment of the present application can reduce the operation time of closing and connecting the pipeline medium during the maintenance of the pipeline and its ancillary equipment, thereby improving safety.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0115] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

Claims

1. A pipeline on-off control device, characterized in that: include: Valve body, valve core, hydraulic telescopic mechanism, hydraulic motor, hydraulic system; The valve body has a channel and a slide groove perpendicular to the channel; The valve core is inserted into the slide groove; The hydraulic expansion and contraction mechanism is connected to the valve core and is used to drive the valve core to expand when extending so as to seal the valve body, or to drive the valve core to contract when contracting so as to release the seal of the valve body; The output shaft of the hydraulic motor is in driving connection with the valve core, and is used to drive the valve core to move forward in the slide groove in forward rotation to open the hole of the valve body, or to drive the valve core to move backward in the slide groove in reverse rotation to block the hole of the valve body; The hydraulic system is connected to the hydraulic motor and the hydraulic telescopic mechanism, and is used to control the forward or reverse rotation of the hydraulic motor, and control the extension or contraction of the hydraulic telescopic mechanism.

2. The pipeline on-off control device according to claim 1, characterized in that: The hydraulic system comprises: an oil source, an oil supply pipe, an oil return pipe, a first reversing valve, a second reversing valve, and a controller; The outlet of the oil source is connected to the inlet of the oil supply pipe, and the inlet of the oil source is connected to the outlet of the oil return pipe; The first reversing valve comprises a first oil inlet, a first oil return port, a first working oil port, and a second working oil port, wherein the first oil inlet is connected to the outlet of the oil supply pipe, the first oil return port is connected to the inlet of the oil return pipe, the first working oil port is connected to the forward interface pipeline of the hydraulic motor, and the second working oil port is connected to the reverse interface pipeline of the hydraulic motor; The second reversing valve comprises a second oil inlet, a second oil return port, a third working oil port, and a fourth working oil port, wherein the second oil inlet is connected to the outlet of the oil supply pipe, the second oil return port is connected to the inlet of the oil return pipe, the third working oil port is sealed, and the fourth working oil port is connected to the hydraulic telescopic mechanism through an oil port pipeline; The controller is electrically connected to the first reversing valve and the second reversing valve.

3. The pipeline on-off control device according to claim 2, characterized in that: The controlling the hydraulic motor to rotate forward or reverse specifically includes: The controller controls the left side of the first reversing valve to be connected, connects the first oil inlet and the first working oil port, and connects the first oil return port and the second working oil port, so that the hydraulic motor rotates forward; The controller controls the right side of the first reversing valve to be connected, connects the first oil inlet and the second working oil port, and connects the first oil return port and the first working oil port, so as to reverse the hydraulic motor.

4. The pipeline on-off control device according to claim 2, characterized in that: The controlling the extension or contraction of the hydraulic telescopic mechanism specifically includes: Control the second reversing valve to lose power, connect the second oil return port and the fourth working oil port, so that the hydraulic telescopic mechanism extends; The second reversing valve is controlled to be energized to connect the second oil inlet and the fourth working oil port, so as to shrink the hydraulic telescopic mechanism.

5. The pipeline on-off control device according to claim 2, characterized in that: It also includes a first proximity switch, which is arranged on the valve body and is used to detect whether the valve core moves forward into position in the valve body, or to detect whether the valve core moves backward into position in the valve body; The controller is electrically connected to the first proximity switch, and is used to control the hydraulic motor to stop running and control the hydraulic telescopic mechanism to extend when receiving a signal sent by the first proximity switch indicating that the valve core moves forward or reversely into position in the valve body.

6. The pipeline on-off control device according to claim 2, characterized in that: It also includes a second proximity switch, which is arranged on the valve core and is used to detect whether the hydraulic telescopic mechanism is fully retracted; The controller is electrically connected to the second proximity switch, and is used to control the hydraulic motor to rotate forward or reverse when receiving a signal from the second proximity switch indicating that the hydraulic telescopic mechanism has been retracted to a certain position.

7. The pipeline on-off control device according to claim 2, characterized in that: It also includes a pressure regulating pipe, a pressure regulating valve, a circulation pipe, and an on-off valve; the two ends of the pressure regulating pipe are respectively connected to the middle parts of the oil supply pipe and the oil return pipe, and the pressure regulating valve is arranged on the pressure regulating pipe to adjust the pressure of the pressure regulating pipe; the two ends of the circulation pipe are respectively connected to the middle parts of the oil supply pipe and the oil return pipe, and the on-off valve is arranged on the circulation pipe; the controller is electrically connected to the on-off valve and the pressure regulating valve.

8. The pipeline on-off control device according to claim 2, characterized in that: The valve core comprises a frame, an orifice plate group, and a cover plate group; the frame is inserted into the slide groove of the valve body and can move in the slide groove of the valve body, and the output shaft of the hydraulic motor is drivingly connected to the frame; The orifice plate group includes a first orifice plate, a first telescopic sleeve, and a second orifice plate connected in sequence, the inner holes of the first orifice plate, the first telescopic sleeve, and the second orifice plate are connected in sequence, and the hydraulic telescopic mechanism includes a first hydraulic cylinder group, which is connected to the first orifice plate and the second orifice plate respectively, and is used to drive the first orifice plate and the second orifice plate to move in a direction away from each other when extending, so as to drive the orifice plate group to expand, or to drive the first orifice plate and the second orifice plate to move in a direction close to each other when contracting, so as to drive the orifice plate group to contract; The cover plate group includes a first cover plate, a second telescopic sleeve, and a second cover plate connected in sequence, and the hydraulic telescopic mechanism includes a second hydraulic cylinder group, which is respectively connected to the first cover plate and the second cover plate, and is used to drive the first cover plate and the second cover plate to move away from each other when extending, so as to drive the cover plate group to expand, or to drive the first cover plate and the second cover plate to move towards each other when contracting, so as to drive the cover plate group to contract; wherein, the first hydraulic cylinder group and the second hydraulic cylinder group are arranged in parallel.

9. The pipeline on-off control device according to claim 8, characterized in that: The first hydraulic cylinder group includes: N first hydraulic cylinders, N is a positive integer greater than or equal to 1, each of the N first hydraulic cylinders includes a first cylinder body, a first piston, a first piston rod, and a first spring, the side of the first cylinder body is connected to the frame, the outer bottom of the first cylinder body is connected to the first orifice plate, the first spring and the first piston are arranged in the inner cavity of the first cylinder body, and one end of the first spring is connected to the bottom of the inner cavity of the first cylinder body, and the other end is connected to the first piston, one end of the first piston rod is connected to the first piston, and the other end is connected to the second orifice plate; The second hydraulic cylinder group includes: N second hydraulic cylinders, each of the N second hydraulic cylinders includes a second cylinder body, a second piston, a second piston rod, and a second spring, the side of the second cylinder body is connected to the frame, the outer bottom of the second cylinder body is connected to the first cover plate, the second spring and the second piston are arranged in the inner cavity of the second cylinder body, and one end of the second spring is connected to the bottom of the inner cavity of the second cylinder body, and the other end is connected to the second piston, one end of the second piston rod is connected to the second piston, and the other end is connected to the second cover plate.

10. The pipeline on-off control device according to claim 9, characterized in that: The N first hydraulic cylinders are connected in series in sequence, and the N second hydraulic cylinders are connected in series in sequence. The oil port pipeline includes a first branch pipe, a second branch pipe, and a third branch pipe that are connected to each other. The first branch pipe is connected to the second working oil port of the second reversing valve, the second branch pipe is connected to the cylinder body of the first first hydraulic cylinder among the N first hydraulic cylinders, and the cylinder body of the first second hydraulic cylinder among the N second hydraulic cylinders, respectively, and the third branch pipe is connected to the cylinder body of the Nth first hydraulic cylinder among the N first hydraulic cylinders, and the cylinder body of the Nth second hydraulic cylinder among the N second hydraulic cylinders, respectively.

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