Remote control type main transformer emergency oil drain electric valve

Abstract

The disclosure provides a remote control type main transformer accident oil discharge electric valve, comprising a rack, a manual stop valve, a striker, a drive motor and a control module; wherein the firing end of the striker faces a glass plug plate, the drive end of the striker and the operating rod of the manual stop valve are in transmission connection; the output shaft of the drive motor and the operating rod of the manual stop valve are in transmission connection; the control module is used for remotely controlling the forward rotation of the output shaft of the drive motor, so as to drive the oil inlet end and the oil discharge end of the manual stop valve to be conductive through the operating rod of the manual stop valve and drive the firing end of the striker to be released, so that the firing end of the striker breaks the glass plug plate. In the remote control type main transformer accident oil discharge electric valve, the operator can open the manual stop valve in a relatively safe position, and the reform workload is effectively reduced and the main transformer safe operation risk is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of transformer protection technology, and in particular to a remote-controlled electric drain valve for main transformer accidents. Background Technology

[0002] Emergency drain valves are installed at the bottom of large oil-immersed transformers to drain large amounts of insulating oil from the main transformer in extreme situations such as fires or explosions, preventing the accident from developing and escalating. Early oil-immersed transformers used mechanical metal shut-off valves with glass plugs installed at the outlet.

[0003] The design has a potential drawback: when the main transformer experiences an extreme fault such as a fire or explosion and the emergency drain valve needs to be opened, personnel cannot directly approach the burning (exploded) main transformer to open the emergency drain valve and break the glass stopper to drain the oil. Therefore, the emergency drain valve cannot effectively drain the oil, prevent the accident from escalating, and reduce losses. Thus, the manually operated main transformer emergency drain valve needs to be modified to ensure that personnel can open it from a relatively safe position, truly meeting the need for main transformer oil drainage in emergency situations.

[0004] The most direct modification solution is to replace the existing manual shut-off valve with an electric drain valve, or to add an electric drain valve after the manual shut-off valve and set the manual drain valve to the normally open position. However, both of these solutions share a common difficulty: the replacement or addition of an electric drain valve will inevitably contaminate the insulating oil, and air will inevitably be introduced into the insulating oil during installation. After replacing or adding the electric drain valve, the main transformer needs to undergo hot oil circulation and purification to ensure its safe operation. Therefore, replacing or adding an electric drain valve will generate a large amount of work and increase the risk to the safe operation of the main transformer. Summary of the Invention

[0005] This disclosure aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, the purpose of this disclosure is to provide a remote-controlled electric valve for emergency oil draining of main transformers.

[0007] To achieve the above objectives, this disclosure provides a remote-controlled main transformer emergency drain valve, comprising: a frame, a manual shut-off valve, a breaker, a drive motor, and a control module; wherein, the manual shut-off valve is mounted on the frame, and its inlet end is connected to the drain end of the main transformer's oil tank, and its drain end is connected to the inlet end of a drain pipe, wherein a glass plug is provided at the drain end of the drain pipe to seal the drain end; the breaker is mounted at the drain end of the drain pipe, and its firing end faces the glass plug, and its drive end is kinetically connected to the operating lever of the manual shut-off valve; The drive motor is mounted on the frame, and its output shaft is connected to the operating lever of the manual shut-off valve. The signal output terminal of the control module is connected to the signal input terminal of the drive motor, and the control module is used to remotely control the output shaft of the drive motor to rotate forward, thereby driving the oil inlet and outlet of the manual shut-off valve to open via the operating lever of the manual shut-off valve and to release the firing end of the puncturator, so that the firing end of the puncturator breaks the glass block; and to remotely control the output shaft of the drive motor to rotate in reverse, thereby driving the oil inlet and outlet of the manual shut-off valve to close via the operating lever of the manual shut-off valve.

[0008] Optionally, the puncture device includes: a support frame, a fixed sleeve, a firing spike, a pin, and a compression spring; wherein, the support frame is disposed at the oil drain end of the oil drain pipe, and the fixed sleeve is disposed on the support frame and close to the glass stop plate; the firing spike is slidably disposed within the fixed sleeve along the vertical direction of the glass stop plate; the pin is inserted into the fixed sleeve and passes through the firing spike; the compression spring is disposed between the firing spike and the support frame, and the compression spring applies a spring force toward the glass stop plate to the firing spike; the pin is kinetically connected to the operating lever of the manual shut-off valve, and the control module is used to remotely control the output shaft of the drive motor to rotate forward, so as to drive the pin to move out of the firing spike and release the firing spike through the operating lever of the manual shut-off valve.

[0009] Optionally, the puncture device further includes: a winch, a pulley block, and a steel wire rope; wherein the winch is sleeved on the operating lever of the manual shut-off valve, and the pulley block is rotatably mounted on the frame; the first end of the steel wire rope is wound around the winch, and the second end of the steel wire rope passes over the pulley block and is connected to the pin; the control module is used to remotely control the output shaft of the drive motor to rotate forward, so as to drive the winch to wind the steel wire rope through the operating lever of the manual shut-off valve, so that the pin is removed from the firing spike and the firing spike is released.

[0010] Optionally, the control module includes: a controller, a valve opening contactor, and a valve closing contactor; wherein, the first terminal of the valve opening remote control switch in the controller is connected to the live wire of the power output terminal, the second terminal of the valve opening remote control switch in the controller is connected to the first terminal of the coil in the valve opening contactor, the second terminal of the coil in the valve opening contactor is connected to the neutral wire of the power output terminal, and the first normally open contact of the valve opening contactor is connected in series between the power output terminal and the forward rotation input terminal of the drive motor; wherein, when the valve opening remote control switch is turned on, the first normally open contact of the valve opening contactor is turned on, and The output shaft of the drive motor rotates in the forward direction. The first terminal of the valve-closing remote control switch in the controller is connected to the live wire of the power output terminal. The second terminal of the valve-closing remote control switch in the controller is connected to the first terminal of the coil in the valve-closing contactor. The second terminal of the coil in the valve-closing contactor is connected to the neutral wire of the power output terminal. The first normally open contact of the valve-closing contactor is connected in series between the power output terminal and the reverse input terminal of the drive motor. When the valve-closing remote control switch is turned on, the first normally open contact of the valve-closing contactor is turned on, and the output shaft of the drive motor rotates in the reverse direction.

[0011] Optionally, the control module further includes: a valve opening limit switch and a valve closing limit switch; wherein, the valve opening limit switch is set at the first limit position of the manual shut-off valve, and the normally closed contact of the valve opening limit switch is connected in series between the second end of the coil of the valve opening contactor and the neutral wire of the power output terminal, wherein when the oil inlet and outlet of the manual shut-off valve are connected and the valve is opened to the first limit position, the valve opening limit switch is energized and the normally closed contact of the valve opening limit switch is opened; the valve closing limit switch is set at the second limit position of the manual shut-off valve, and the normally closed contact of the valve closing limit switch is connected in series between the second end of the coil of the valve closing contactor and the neutral wire of the power output terminal, wherein when the oil inlet and outlet of the manual shut-off valve are closed and the valve is closed to the second limit position, the valve closing limit switch is energized and the normally closed contact of the valve closing limit switch is opened.

[0012] Optionally, the control module further includes: an opening electromagnetic relay and a closing electromagnetic relay; wherein, the first end of the coil of the opening electromagnetic relay is connected to the live wire of the power output terminal, and the second normally open contact of the opening electromagnetic relay is connected in series in the opening signal input terminal of the controller; the first end of the normally open contact of the opening limit switch is connected to the second end of the coil of the opening electromagnetic relay, and the second end of the normally open contact of the opening limit switch is connected to the neutral wire of the power output terminal; wherein, when the oil inlet and outlet of the manual shut-off valve are connected and the valve is opened to the first limit position, the normally open contact of the opening limit switch is activated, and the valve... The second normally open contact of the valve opening electromagnetic relay is turned on; the first end of the coil of the valve closing electromagnetic relay is connected to the live wire of the power output terminal, and the second normally open contact of the valve closing electromagnetic relay is connected in series with the valve closing signal input terminal of the controller; the first end of the normally open contact of the valve closing limit switch is connected to the second end of the coil of the valve closing electromagnetic relay, and the second end of the normally open contact of the valve closing limit switch is connected to the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve are closed and the valve is closed to the second limit position, the normally open contact of the valve closing limit switch is turned on, and the second normally open contact of the valve closing electromagnetic relay is turned on.

[0013] Optionally, the control module further includes: a valve opening indicator light, a valve closing indicator light, and a power indicator light; wherein, the first end of the first normally open contact of the valve opening electromagnetic relay is connected to the live wire of the power output terminal, and the first end of the valve opening indicator light is connected to the second end of the first normally open contact of the valve opening electromagnetic relay, and the second end of the valve opening indicator light is connected to the neutral wire of the power output terminal; wherein, when the oil inlet and outlet of the manual shut-off valve are connected and the valve is opened to the first limit position, the first normally open contact of the valve opening electromagnetic relay is closed, and the valve opening indicator light is energized and illuminated; the valve closing electromagnetic relay... The first terminal of the first normally open contact in the relay is connected to the live wire of the power output terminal, and the first terminal of the valve closing indicator light is connected to the second terminal of the first normally open contact in the valve closing electromagnetic relay. The second terminal of the valve closing indicator light is connected to the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve are closed and the valve is closed to the second limit position, the first normally open contact of the valve closing electromagnetic relay is turned on, and the valve closing indicator light is powered on and illuminated. The first terminal of the power indicator light is connected to the live wire of the power output terminal, and the second terminal of the power indicator light is connected to the neutral wire of the power output terminal.

[0014] Optionally, the control module further includes: a normally closed contact for valve opening overload, a normally closed contact for tripping the high-voltage side of the main transformer, and a normally closed contact for valve closing overload; wherein, the normally closed contact for valve opening overload is connected in series between the second end of the coil of the valve opening contactor and the neutral wire of the power output terminal, and the normally closed contact for valve opening overload is used to disconnect when the output shaft of the drive motor rotates in the forward direction and an overload abnormality occurs; the normally closed contact for tripping the high-voltage side of the main transformer is connected in series between the second end of the coil of the valve opening contactor and the neutral wire of the power output terminal, and the normally closed contact for tripping the high-voltage side of the main transformer is used to disconnect when the main transformer is energized; the normally closed contact for valve closing is connected in series between the second end of the coil of the valve closing contactor and the neutral wire of the power output terminal, and the normally closed contact for valve closing overload is used to disconnect when the output shaft of the drive motor rotates in the reverse direction and an overload abnormality occurs.

[0015] Optionally, the control module further includes: a switching switch, a local valve opening button, and a local valve closing button; wherein, the switching switch is disposed between the first terminal of the remote valve opening control switch and the live wire of the power output terminal, and between the first terminal of the remote valve closing control switch and the live wire of the power output terminal, and the first terminal of the switching switch is connected to the live wire of the power output terminal; the second terminal of the switching switch is connected to the first terminal of the remote valve opening control switch and the first terminal of the remote valve closing control switch, respectively; the first terminals of the local valve opening button and the local valve closing button are respectively connected to the third terminal of the switching switch; the second terminal of the local valve opening button is connected to the first terminal of the coil in the valve opening contactor; and the second terminal of the local valve closing button is connected to the first terminal of the coil in the valve closing contactor. The first terminal is connected; when the first and second terminals of the switch are connected and the valve opening remote control switch is connected, or when the first and third terminals of the switch are connected and the local valve opening button is connected, the first normally open contact in the valve opening contactor is connected, and the output shaft of the drive motor rotates in the forward direction; when the first and second terminals of the switch are connected and the valve closing remote control switch is connected, or when the first and third terminals of the switch are connected and the local valve closing button is connected, the first normally open contact in the valve closing contactor is connected, and the output shaft of the drive motor rotates in the reverse direction; the normally open contact of the switch is connected in series with the remote signal input terminal of the controller, and when the first and second terminals of the switch are connected, the normally open contact of the switch is connected.

[0016] Optionally, the first end of the second normally open contact of the valve opening contactor is connected to the second end of the valve opening remote control switch in the controller and the second end of the local valve opening button, respectively; and the first end of the second normally open contact of the valve closing contactor is connected to the second end of the valve closing remote control switch in the controller and the second end of the local valve closing button, respectively; the second end of the second normally open contact of the valve opening contactor and the second end of the second normally open contact of the valve closing contactor are respectively connected to the first end of the switching switch; and / or, the normally closed contact of the valve opening contactor is connected in series between the second end of the valve closing remote control switch in the controller and the first end of the coil in the valve closing contactor, and between the second end of the local valve closing button and the first end of the coil in the valve closing contactor, and the... The first end of the normally closed contact in the valve opening contactor is connected to the second end of the remote valve closing switch in the controller and the second end of the local valve closing button, respectively. The second end of the normally closed contact in the valve opening contactor is connected to the first end of the coil in the valve closing contactor. The normally closed contact in the valve closing contactor is connected in series between the second end of the remote valve opening switch in the controller and the first end of the coil in the valve opening contactor, and between the second end of the local valve opening button and the first end of the coil in the valve opening contactor. The first end of the normally closed contact in the valve closing contactor is connected to the second end of the remote valve opening switch in the controller and the second end of the local valve opening button, respectively. The second end of the normally closed contact in the valve closing contactor is connected to the first end of the coil in the valve opening contactor.

[0017] The technical solution provided in this disclosure may include the following beneficial effects: The control module remotely controls the output shaft of the drive motor to rotate forward, thereby driving the oil inlet and outlet of the manual shut-off valve to open via the operating lever of the manual shut-off valve, and releasing the firing end of the breaker. This causes the firing end of the breaker to break the glass blockage plate, ensuring that the operator can open the manual shut-off valve from a relatively safe position, meeting the main transformer's oil drainage needs in case of an accident. Moreover, it avoids the problems of contaminating insulating oil, allowing insulating oil to enter the air, and increasing hot oil circulation operations that exist with replacing or adding electric oil drainers, effectively reducing the amount of modification work and lowering the risk to the safe operation of the main transformer.

[0018] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the structure of a remote-controlled main transformer emergency oil drain electric valve according to an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a remote-controlled main transformer emergency oil drain electric valve according to an embodiment of this disclosure; Figure 3 This is a partial structural schematic diagram of the breakdown device in a remote-controlled main transformer emergency oil drain electric valve according to an embodiment of this disclosure; Figure 4 This is a partial structural schematic diagram of the breakdown device in a remote-controlled main transformer emergency oil drain electric valve according to an embodiment of this disclosure; Figure 5 This is a circuit diagram of a remote-controlled main transformer emergency oil drain electric valve according to an embodiment of this disclosure; Figure 6 This is a circuit diagram of a remote-controlled main transformer emergency oil drain electric valve according to an embodiment of this disclosure; As shown in the figure: 1. Frame, 2. Manual shut-off valve; 3. Puncture device; 31. Support frame; 32. Fixing sleeve; 33. Firing spike; 34. Pin; 35. Compression spring; 36. Winch; 37. Pulley block; 38. Wire rope. 4. Drive motor; 5. Control module; 100. Oil drain pipe; 200. Glass stopper. KO, valve opening contactor; KC, valve closing contactor; PLCO, valve opening remote control switch; PLCC, valve closing remote control switch; LSO1, valve open limit switch; LSC1, valve close limit switch; KA1, valve opening electromagnetic relay; KA2, valve closing electromagnetic relay; HO, Valve Open Indicator; HC, Valve Close Indicator; HD, Power Indicator; SA, changeover switch; SBO, local valve open button; SBC, local valve close button. TSO, normally closed contact for valve opening overload; TSC, normally closed contact for valve closing overload; DS, normally closed contact for tripping the high-voltage side of the main transformer. Detailed Implementation

[0020] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0021] like Figure 1 , Figure 2 and Figure 5As shown in the figure, this disclosure proposes a remote-controlled main transformer emergency drain valve, including: a frame 1, a manual shut-off valve 2, a puncturer 3, a drive motor 4, and a control module 5. The manual shut-off valve 2 is mounted on the frame 1, and its inlet is connected to the drain end of the main transformer's oil tank. The drain end of the manual shut-off valve 2 is also connected to the inlet of the drain pipe 100. A glass plug 200 is provided at the drain end of the drain pipe 100 to seal it. The puncturer 3 is mounted at the drain end of the drain pipe 100, with its firing end facing the glass plug 200. The drive end of the puncturer 3 is connected to the operating lever of the manual shut-off valve 2. The drive motor 4 is mounted on the frame 1. The output shaft of the control module 5 is connected to the operating lever of the manual shut-off valve 2. The signal output terminal of the control module 5 is connected to the signal input terminal of the drive motor 4. The control module 5 is used to remotely control the output shaft of the drive motor 4 to rotate in the forward direction, so as to drive the oil inlet and oil outlet of the manual shut-off valve 2 to be connected through the operating lever of the manual shut-off valve 2 and to drive the firing end of the puncturator 3 to be released, so that the firing end of the puncturator 3 breaks the glass block 200. The control module 5 is also used to remotely control the output shaft of the drive motor 4 to rotate in the reverse direction, so as to drive the oil inlet and oil outlet of the manual shut-off valve 2 to be shut off through the operating lever of the manual shut-off valve 2.

[0022] Understandably, since the inlet of the manual shut-off valve 2 is connected to the drain of the main transformer's tank, and the drain of the manual shut-off valve 2 is connected to the inlet of the drain pipe 100, the manual shut-off valve 2 can open the passage between the main transformer's tank and the drain pipe 100 when the operating lever is rotated by external force, thereby realizing the drain of the main transformer. Furthermore, since the firing end of the breaker 3 faces the glass block 200, and the driving end of the breaker 3 is connected to the operating lever of the manual shut-off valve 2, when the operating lever of the manual shut-off valve 2 is rotated by external force and the manual shut-off valve 2 is opened, the firing end of the breaker 3 can be driven to move simultaneously, thereby breaking the glass block 200. At the same time, since the signal output end of the control module 5 is connected to the signal input end of the drive motor 4, and the output shaft of the drive motor 4 is connected to the operating lever of the manual shut-off valve 2, the control module 5 can control the drive motor 4 and use the drive motor 4 to drive the operating lever of the manual shut-off valve 2 to rotate.

[0023] Specifically, the control module 5 remotely controls the output shaft of the drive motor 4 to rotate in the forward direction, thereby driving the oil inlet and outlet ends of the manual shut-off valve 2 to be connected through the operating lever of the manual shut-off valve 2 and releasing the firing end of the breaker 3, so that the firing end of the breaker 3 breaks the glass block 200. This ensures that the operator can open the manual shut-off valve 2 from a relatively safe position, meeting the main transformer's oil drainage needs in case of an accident. Moreover, it avoids the problems of contaminating insulating oil, insulating oil entering the air, and increasing hot oil circulation operations that exist with replacing or adding electric oil drainage methods, effectively reducing the amount of modification work and lowering the risk of main transformer safe operation.

[0024] It should be noted that the oil drain electric valve in this embodiment first solves the hidden danger that operators cannot approach and open the manual shut-off valve 2 in the event of a fire in an oil-immersed main transformer. After the operators remotely open the manual shut-off valve 2, the main transformer accident can be prevented from escalating and the accident loss can be reduced.

[0025] Secondly, it solves new problems in traditional retrofitting schemes, such as potential contamination of insulating oil and the introduction of air into the insulating oil, as well as the drawback of requiring hot oil circulation after implementation of traditional retrofitting schemes to ensure the safe and stable operation of the main transformer. The oil drain electric valve in this embodiment significantly reduces labor and material costs, improves the retrofitting efficiency of the main transformer emergency oil drain valve, and enhances the reliability of the main transformer's safe operation.

[0026] The frame 1 is used to support the manual shut-off valve 2, drive motor 4, etc. The specific type of the frame 1 can be set according to actual needs and there is no restriction. For example, the frame 1 can be a frame structure. The manual shut-off valve 2 is located at the bottom of the frame 1 and passes through the frame 1. The operating rod of the manual shut-off valve 2 extends vertically to the top of the frame 1.

[0027] The manual shut-off valve 2 is used to manually control the opening and closing of the passage between the main transformer oil tank and the drain pipe 100. The specific type of the manual shut-off valve 2 can be set according to actual needs and there is no restriction. For example, the manual shut-off valve 2 is set at the bottom of the frame 1 in a horizontal direction, and the oil inlet end of the manual shut-off valve 2 is connected to the flange bolt of the main transformer oil tank through an oil pipeline. The oil outlet end of the manual shut-off valve 2 is connected to the drain pipe 100 (bend) through a flange bolt. The operating lever of the manual shut-off valve 2 is connected to the handwheel at the top of the frame 1 through a coupling, and the manual drive of the operating lever rotation is realized through the handwheel.

[0028] In addition, the oil outlet end of the oil drain pipe 100 is bent and extends downward. A plug flange is provided at the oil outlet end of the oil drain pipe 100, and the glass plug 200 is sealed at the oil outlet end of the oil drain pipe 100 through the plug flange.

[0029] The puncturer 3 is used to break the glass block 200 by using the firing end, so as to realize the conduction and drainage of oil in the drain pipe 100. The specific type of the puncturer 3 can be set according to actual needs, and there is no restriction on it.

[0030] The drive motor 4 is used to drive the operating lever of the manual shut-off valve 2 to rotate, so as to drive the breaker 3 to break the glass block 200 while controlling the manual shut-off valve 2 to be open. The specific type of drive motor 4 can be set according to actual needs and there is no restriction. For example, the drive motor 4 is an AC forward and reverse motor, which is installed directly above the operating lever of the manual shut-off valve 2 and fixed to the top of the frame 1 with a metal support. The output shaft of the drive motor 4 is connected to the coupling at the top of the operating lever through a reduction gearbox (reduction gear set, bevel gear set, etc.).

[0031] like Figure 3 As shown, in some embodiments, the puncturer 3 includes: a support frame 31, a fixing sleeve 32, a firing spike 33, a pin 34, and a compression spring 35. The support frame 31 is disposed at the oil drain end of the oil drain pipe 100, and the fixing sleeve 32 is disposed on the support frame 31 and close to the glass stop plate 200. The firing spike 33 is slidably disposed within the fixing sleeve 32 along the vertical direction of the glass stop plate 200. The pin 34 is inserted into the fixing sleeve 32 and passes through the firing spike 33. The compression spring 35 is disposed between the firing spike 33 and the support frame 31, and applies a spring force towards the glass stop plate 200 to the firing spike 33. The pin 34 is connected to the operating lever of the manual shut-off valve 2, and the control module 5 is used to remotely control the output shaft of the drive motor 4 to rotate forward, so that the operating lever of the manual shut-off valve 2 drives the pin 34 to move out of the firing spike 33 and release the firing spike 33.

[0032] It is understandable that, since the firing spike 33 is slidably disposed vertically within the fixed sleeve 32 along the glass stop plate 200, and the pin 34 is inserted into the fixed sleeve 32 and passes through the firing spike 33, and the compression spring 35 is disposed between the firing spike 33 and the support frame 31, the firing spike 33 can be positioned in the fixed sleeve 32 by means of the pin 34, and at the same time, the compression spring 35 can be used to store force. Furthermore, since the pin 34 is connected to the operating rod of the manual shut-off valve 2, when the output shaft of the drive motor 4 is rotated in the forward direction by the remote control module 5, the pin 34 can be moved out of the firing spike 33 by means of the operating rod of the manual shut-off valve 2, thereby releasing the firing spike 33 and breaking the glass stop plate 200 under the force of the compression spring 35, thereby achieving effective oil drainage of the main transformer.

[0033] Among them, the support frame 31 is used to support the fixing sleeve 32, the compression spring 35, etc. The specific type of the support frame 31 can be set according to actual needs and there is no restriction. For example, the support frame 31 can be a U-shaped frame structure and is fixed to the plug flange at the oil outlet end of the oil drain pipe 100 by bolts, etc.

[0034] The fixing sleeve 32 is used to arrange the firing spikes 33, pins 34, etc. The specific type of fixing sleeve 32 can be set according to actual needs and there is no restriction. For example, the fixing sleeve 32 is a sleeve structure and is set along the vertical direction of the glass stop plate 200.

[0035] The firing spike 33 is used to break the glass stopper 200. The specific type of the firing spike 33 can be set according to actual needs and there is no restriction. For example, the firing spike 33 is a columnar structure, and the end of the firing spike 33 near the glass stopper 200 is a toothed spike structure.

[0036] The pin 34 passes through the fixed sleeve 32 and the firing spike 33 to lock the firing spike 33. The specific type of the pin 34 can be set according to actual needs and there is no restriction. For example, the pin 34 is a pin structure that passes through the fixed sleeve 32 and the firing spike 33 in the horizontal direction.

[0037] The compression spring 35 is used to apply a spring force toward the glass stop plate 200 on the firing spike 33. The specific type of the compression spring 35 can be set according to actual needs and is not limited thereto. For example, the compression spring 35 is a helical spring, which can be radially limited by a sleeve. At the same time, in order to facilitate the compression installation of the compression spring 35, a detachable threaded structure can be set at the bottom of the support frame 31. The compression and storage of the compression spring 35 can be achieved by screwing in the threaded structure.

[0038] like Figure 4 As shown, in some embodiments, the puncturer 3 further includes a winch 36, a pulley block 37, and a wire rope 38. The winch 36 is mounted on the operating lever of the manual shut-off valve 2, and the pulley block 37 is rotatably mounted on the frame 1. The first end of the wire rope 38 is wound around the winch 36, and the second end of the wire rope 38 passes over the pulley block 37 and is connected to a pin 34. The control module 5 is used to remotely control the output shaft of the drive motor 4 to rotate forward, so that the operating lever of the manual shut-off valve 2 drives the winch 36 to wind the wire rope 38, causing the pin 34 to move out of the firing spike 33 and release the firing spike 33.

[0039] Understandably, since the winch 36 is mounted on the operating lever of the manual shut-off valve 2, and the pulley block 37 is rotatably mounted on the frame 1, the first end of the wire rope 38 is wound around the winch 36, and the second end of the wire rope 38 passes around the pulley block 37 and is connected to the pin 34. This allows the control module 5 to control the output shaft of the drive motor 4 to rotate in the forward direction, thereby driving the winch 36 to rotate through the operating lever of the manual shut-off valve 2, thus winding the first end of the wire rope 38. In turn, the winding of the wire rope 38 pulls the pin 34 out of the firing spike 33 and releases the firing spike 33, thereby breaking the glass block 200.

[0040] The winch 36 is used to rotate with the operating lever of the manual shut-off valve 2 to wind the wire rope 38 so as to pull the pin 34. The specific type of the winch 36 can be set according to actual needs and there is no restriction. For example, the winch 36 is a disc-shaped structure with a spiral rope groove for winding the wire rope 38. The winch 36 is sleeved on the coupling at the top of the operating lever.

[0041] It should be noted that when the output shaft of the drive motor 4 rotates in the forward direction, the winch 36 continuously tightens the wire rope 38, while when the output shaft of the drive motor 4 rotates in the reverse direction, the winch 36 releases the wire rope 38. In other words, when the manual shut-off valve 2 closes again, the wire rope 38 is in a slack state, and the pin 34 can be manually reset.

[0042] The pulley block 37 is used to guide the wire rope 38 and reduce the frictional loss of the wire rope 38. The specific type of pulley block 37 can be set according to actual needs and there is no limitation. For example, the pulley block 37 includes two pulleys. One pulley is rotatably set at the top of the frame 1 and the other pulley is rotatably set at the bottom of the frame 1. The second end of the wire rope 38 passes through the two pulleys in sequence and is connected to the pin ring at the tail of the pin 34.

[0043] The wire rope 38 is used to follow the movement of the operating lever of the manual shut-off valve 2 via the pin 34. The specific type of the wire rope 38 can be set according to actual needs and there are no restrictions on it.

[0044] like Figure 5 As shown, in some embodiments, the control module 5 includes: a controller (not shown), a valve opening contactor KO, and a valve closing contactor KC. The first terminal of the valve opening remote control switch PLCO in the controller is connected to the live wire of the power output terminal. The second terminal of the valve opening remote control switch PLCO in the controller is connected to the first terminal of the coil in the valve opening contactor KO. The second terminal of the coil in the valve opening contactor KO is connected to the neutral wire of the power output terminal. The first normally open contact of the valve opening contactor KO is connected in series between the power output terminal and the forward rotation input terminal of the drive motor 4. When the valve opening remote control switch PLCO is turned on, the first normally open contact of the valve opening contactor KO is turned on, causing the output shaft of the drive motor 4 to rotate in the forward direction. Turn; The first terminal of the valve-closing remote control switch PLCC in the controller is connected to the live wire of the power output terminal, the second terminal of the valve-closing remote control switch PLCC in the controller is connected to the first terminal of the coil in the valve-closing contactor KC, the second terminal of the coil in the valve-closing contactor KC is connected to the neutral wire of the power output terminal, and the first normally open contact in the valve-closing contactor KC is connected in series between the power output terminal and the reverse input terminal of the drive motor 4. When the valve-closing remote control switch PLCC is turned on, the first normally open contact in the valve-closing contactor KC is turned on, and the output shaft of the drive motor 4 is rotated in reverse.

[0045] Understandably, since the first terminal of the valve opening remote control switch PLCO in the controller is connected to the live wire of the power output terminal, and the second terminal of the valve opening remote control switch PLCO in the controller is connected to the first terminal of the coil in the valve opening contactor KO, and the second terminal of the coil in the valve opening contactor KO is connected to the neutral wire of the power output terminal, when the controller controls the valve opening remote control switch PLCO to conduct, the coil of the valve opening contactor KO is energized, causing the first normally open contact in the valve opening contactor KO to conduct. Furthermore, since the first normally open contact in the valve opening contactor KO is connected in series between the power output terminal and the forward rotation input terminal of the drive motor 4, when the first normally open contact in the valve opening contactor KO is conducting, the power supply can be made to the forward rotation input terminal of the drive motor 4, thereby realizing the forward rotation of the output shaft of the drive motor 4, and thus realizing the remote opening of the manual shut-off valve 2.

[0046] Because the first terminal of the valve-closing remote control switch PLCC in the controller is connected to the live wire of the power output terminal, and the second terminal of the valve-closing remote control switch PLCC in the controller is connected to the first terminal of the coil in the valve-closing contactor KC, and the second terminal of the coil in the valve-closing contactor KC is connected to the neutral wire of the power output terminal, when the controller controls the valve-closing remote control switch PLCC to conduct, the coil of the valve-closing contactor KC is energized, causing the first normally open contact in the valve-closing contactor KC to conduct. Furthermore, because the first normally open contact in the valve-closing contactor KC is connected in series between the power output terminal and the reverse input terminal of the drive motor 4, when the first normally open contact in the valve-closing contactor KC conducts, the power supply can be made to the reverse input terminal of the drive motor 4, thereby realizing the reverse rotation of the output shaft of the drive motor 4, and thus realizing the remote closing of the manual shut-off valve 2.

[0047] The controller is used for signal transmission and reception control, and includes remote control switches for valve opening (PLCO) and valve closing (PLCC). The specific type of controller can be set according to actual needs and there are no restrictions. For example, the controller can be a PLC (Programmable Logic Controller).

[0048] The valve opening contactor KO is used to open valves, and the valve closing contactor KC is used to close valves. Both have a linkage coil, a first normally open contact, a second normally open contact, and a normally closed contact.

[0049] It should be noted that the input terminal of the drive motor 4 has three terminals, namely the U terminal, the W terminal and the N1 terminal. The U terminal and the N1 terminal constitute the forward rotation input terminal of the drive motor 4, and the W terminal and the N1 terminal constitute the reverse rotation input terminal of the drive motor 4.

[0050] Specifically, the first normally open contact of the valve opening contactor KO has two switches: one switch connects the live wire L1 of the power output terminal to the U terminal of the drive motor 4, and the other switch connects the neutral wire N of the power output terminal to the N1 terminal of the drive motor 4; the first normally open contact of the valve closing contactor KC has two switches: one switch connects the live wire L1 of the power output terminal to the W terminal of the drive motor 4, and the other switch connects the neutral wire N of the power output terminal to the N1 terminal of the drive motor 4.

[0051] The live wire L1 and the neutral wire N at the power output terminal are controlled by switch QF.

[0052] like Figure 5 As shown, in some embodiments, the control module 5 further includes: a valve opening limit switch LSO1 and a valve closing limit switch LSC1. The valve opening limit switch LSO1 is set at the first extreme position of the manually operated shut-off valve 2, and its normally closed contact is connected in series between the second end of the coil of the valve opening contactor KC and the neutral wire of the power output terminal. When the oil inlet and outlet of the manually operated shut-off valve 2 are connected and the valve is opened to the first extreme position, the valve opening limit switch LSO1 is energized, causing its normally closed contact to open. The valve closing limit switch LSC1 is set at the second extreme position of the manually operated shut-off valve 2, and its normally closed contact is connected in series between the second end of the coil of the valve closing contactor KC and the neutral wire of the power output terminal. When the oil inlet and outlet of the manually operated shut-off valve 2 are closed and the valve is closed to the second extreme position, the valve closing limit switch LSC1 is energized, causing its normally closed contact to open.

[0053] Understandably, since the valve opening limit switch LSO1 is set at the first limit position of the manual shut-off valve 2, and the normally closed contact of the valve opening limit switch LSO1 is connected in series between the second end of the coil of the valve opening contactor KO and the neutral line of the power output terminal, when the oil inlet and outlet ends of the manual shut-off valve 2 are connected and the valve is opened to the first limit position, the valve opening limit switch LSO1 is energized, and the normally closed contact of the valve opening limit switch LSO1 is opened, thereby de-energizing the drive motor 4 and thus achieving precise automatic valve opening.

[0054] Since the valve-closing limit switch LSC1 is set at the second limit position of the manual shut-off valve 2, and the normally closed contact of the valve-closing limit switch LSC1 is connected in series between the second end of the coil of the valve-closing contactor KC and the neutral line of the power output terminal, when the oil inlet and outlet ends of the manual shut-off valve 2 are closed and the valve is closed to the second limit position, the valve-closing limit switch LSC1 is energized, and the normally closed contact of the valve-closing limit switch LSC1 is opened, thereby de-energizing the drive motor 4 and thus achieving precise automatic valve closing.

[0055] The valve opening limit switch LSO1 is used to detect the first extreme position of the manually operated shut-off valve 2. The specific type of valve opening limit switch LSO1 can be set according to actual needs and is not limited thereto. The valve opening limit switch LSO1 can be used in conjunction with a sensing pin to achieve position detection.

[0056] The valve-closing limit switch LSC1 is used to detect the second extreme position of the manually closed valve 2. The specific type of valve-closing limit switch LSC1 can be set according to actual needs and is not limited thereto. The valve-closing limit switch LSC1 can be used in conjunction with a sensing pin to achieve position detection.

[0057] like Figure 5 and Figure 6 As shown, in some embodiments, the control module 5 further includes: a valve-opening electromagnetic relay KA1 and a valve-closing electromagnetic relay KA2. The first end of the coil in the valve-opening electromagnetic relay KA1 is connected to the live wire of the power output terminal, and the second normally open contact of the valve-opening electromagnetic relay KA1 is connected in series to the valve-opening signal input terminal of the controller. The first end of the normally open contact of the valve-opening limit switch LSO1 is connected to the second end of the coil in the valve-opening electromagnetic relay KA1, and the second end of the normally open contact of the valve-opening limit switch LSO1 is connected to the neutral wire of the power output terminal. When the inlet and outlet ends of the manual shut-off valve 2 are connected and the valve is opened to the first limit position, the normally open contact of the valve-opening limit switch LSO1 is activated, causing the second normally open contact of the valve-opening electromagnetic relay KA1 to activate. The first end of the coil in the valve-closing solenoid relay KA2 is connected to the live wire of the power output terminal, and the second normally open contact in the valve-closing solenoid relay KA2 is connected in series to the valve-closing signal input terminal of the controller. The first end of the normally open contact in the valve-closing limit switch LSC1 is connected to the second end of the coil in the valve-closing solenoid relay KA2, and the second end of the normally open contact in the valve-closing limit switch LSC1 is connected to the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve 2 are closed and the valve is closed to the second limit position, the normally open contact in the valve-closing limit switch LSC1 is turned on, and the second normally open contact in the valve-closing solenoid relay KA2 is turned on.

[0058] Understandably, since the first end of the coil in the valve-opening solenoid relay KA1 is connected to the live wire of the power output terminal, and the second normally open contact in the valve-opening solenoid relay KA1 is connected in series with the valve-opening signal input terminal of the controller, the first end of the normally open contact in the valve-opening limit switch LSO1 is connected to the second end of the coil in the valve-opening solenoid relay KA1, and the second end of the normally open contact in the valve-opening limit switch LSO1 is connected to the neutral wire of the power output terminal, when the oil inlet and outlet of the manual shut-off valve 2 are connected and the valve is opened to the first limit position, the valve-opening limit switch LSO1 is energized, and the normally open contact in the valve-opening limit switch LSO1 is turned on, thereby energizing the coil of the valve-opening solenoid relay KA1, and then turning on the second normally open contact in the valve-opening solenoid relay KA1. Thus, the controller can obtain the valve-opening signal of the manual shut-off valve 2, thereby facilitating the accurate monitoring of the main transformer's oil discharge.

[0059] Because the first end of the coil in the valve-closing solenoid relay KA2 is connected to the live wire of the power output terminal, and the second normally open contact in the valve-closing solenoid relay KA2 is connected in series with the valve-closing signal input terminal of the controller, the first end of the normally open contact in the valve-closing limit switch LSC1 is connected to the second end of the coil in the valve-closing solenoid relay KA2, and the second end of the normally open contact in the valve-closing limit switch LSC1 is connected to the neutral wire of the power output terminal, when the oil inlet and outlet of the manual shut-off valve 2 are closed and the valve is closed to the second limit position, the valve-closing limit switch LSC1 is energized, and the normally closed contact in the valve-closing limit switch LSC1 is opened, thereby turning on the normally open contact in the valve-closing limit switch LSC1, which in turn turns on the second normally open contact in the valve-closing solenoid relay KA2. Thus, the controller can obtain the valve-closing signal of the manual shut-off valve 2, which facilitates the accurate monitoring of the main transformer's oil discharge.

[0060] The valve opening electromagnetic relay KA1 is used to open the valve, and the valve closing electromagnetic relay KA2 is used to close the valve. Both have a linkage coil, a first normally open contact, and a second normally open contact.

[0061] like Figure 5As shown, in some embodiments, the control module 5 further includes: a valve opening indicator light HO, a valve closing indicator light HC, and a power indicator light HD. Specifically, the first terminal of the first normally open contact of the valve opening electromagnetic relay KA1 is connected to the live wire of the power output terminal, and the first terminal of the valve opening indicator light HO is connected to the second terminal of the first normally open contact of the valve opening electromagnetic relay KA1. The second terminal of the valve opening indicator light HO is connected to the neutral wire of the power output terminal. When the oil inlet and outlet terminals of the manual shut-off valve 2 are connected and the valve is opened to the first limit position, the first normally open contact of the valve opening electromagnetic relay KA1 is activated, energizing the valve opening indicator light HO; the first terminal of the first normally open contact of the valve closing electromagnetic relay KA2 is connected to the live wire of the power output terminal. The live wire of the power output terminal is connected, and the first terminal of the valve closing indicator HC is connected to the second terminal of the first normally open contact of the valve closing solenoid relay KA2. The second terminal of the valve closing indicator HC is connected to the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve 2 are closed and the valve is closed to the second limit position, the first normally open contact of the valve closing solenoid relay KA2 is turned on, and the valve closing indicator HC is energized and illuminated. The first terminal of the power indicator HD is connected to the live wire of the power output terminal, and the second terminal of the power indicator HD is connected to the neutral wire of the power output terminal.

[0062] Understandably, since the first terminal of the first normally open contact in the valve opening solenoid relay KA1 is connected to the live wire of the power output terminal, and the first terminal of the valve opening indicator light HO is connected to the second terminal of the first normally open contact in the valve opening solenoid relay KA1, and the second terminal of the valve opening indicator light HO is connected to the neutral wire of the power output terminal, when the oil inlet and outlet terminals of the manual shut-off valve 2 are connected and the valve is opened to the first limit position, the coil of the valve opening solenoid relay KA1 is energized, thereby turning on the first normally open contact in the valve opening solenoid relay KA1, which in turn energizes the valve opening indicator light HO and illuminates it, thus realizing the valve opening position indication.

[0063] Because the first terminal of the first normally open contact in the valve-closing electromagnetic relay KA2 is connected to the live wire of the power output terminal, and the first terminal of the valve-closing indicator light HC is connected to the second terminal of the first normally open contact in the valve-closing electromagnetic relay KA2, and the second terminal of the valve-closing indicator light HC is connected to the neutral wire of the power output terminal, when the oil inlet and outlet of the manual shut-off valve 2 are closed and the valve is closed to the second limit position, the coil of the valve-closing electromagnetic relay KA2 is energized, thereby turning on the first normally open contact in the valve-closing electromagnetic relay KA2, which in turn energizes the valve-closing indicator light HC and illuminates it, thus realizing the valve-closing position indication.

[0064] Since the first terminal of the power indicator HD is connected to the live wire of the power output terminal, and the second terminal of the power indicator HD is connected to the neutral wire of the power output terminal, the power indicator HD can be energized and light up when the live wire and neutral wire of the power output terminal are energized, thus realizing power indication.

[0065] The valve open indicator (HO) indicates that the valve is fully open, the valve close indicator (HC) indicates that the valve is fully closed, and the power indicator (HD) indicates that the power is on. The specific types of the valve open indicator (HO), valve close indicator (HC), and power indicator (HD) can be set according to actual needs and are not restricted.

[0066] like Figure 5 As shown, in some embodiments, the control module 5 further includes: a normally closed contact TSO for valve opening overload, a normally closed contact DS for tripping the high-voltage side of the main transformer, and a normally closed contact TSC for valve closing overload. Specifically, the normally closed contact TSO for valve opening overload is connected in series between the second end of the coil in the valve opening contactor KO and the neutral wire of the power output terminal, and is used to disconnect when the output shaft of the drive motor 4 rotates in the forward direction and an overload abnormality occurs; the normally closed contact DS for tripping the high-voltage side of the main transformer is connected in series between the second end of the coil in the valve opening contactor KO and the neutral wire of the power output terminal, and is used to disconnect when the main transformer is energized; the normally closed contact TSC for valve closing overload is connected in series between the second end of the coil in the valve closing contactor KC and the neutral wire of the power output terminal, and is used to disconnect when the output shaft of the drive motor 4 rotates in the reverse direction and an overload abnormality occurs.

[0067] Understandably, since the normally closed contact TSO for valve opening overload is connected in series between the second end of the coil in the valve opening contactor KO and the neutral wire of the power output terminal, when the output shaft of the drive motor 4 rotates in the forward direction and an overload abnormality occurs, the normally closed contact TSO for valve opening overload will open and de-energize the coil of the valve opening contactor KO, thereby achieving overload protection for the drive motor 4 during the valve opening process.

[0068] Because the normally closed contact TSC for valve overload is connected in series between the second end of the coil in the valve closing contactor KC and the neutral wire of the power output terminal, when the output shaft of the drive motor 4 rotates in reverse and an overload abnormality occurs, the normally closed contact TSC for valve overload will open and de-energize the coil of the valve closing contactor KC, thereby achieving overload protection for the drive motor 4 during the valve closing process.

[0069] Because the normally closed contact DS of the high-voltage side tripping circuit breaker of the main transformer is connected in series between the second end of the coil of the valve opening contactor KO and the neutral line of the power output terminal, when the main transformer is energized, the normally closed contact DS of the high-voltage side tripping circuit breaker of the main transformer opens and the coil of the valve opening contactor KO is not energized, thus ensuring that valve opening control can only be performed after the transformer is de-energized.

[0070] Among them, the normally closed contact TSO for valve opening overload is a normally closed contact used for overload protection when the drive motor 4 performs valve opening action, and the normally closed contact TSC for valve closing overload is a normally closed contact used for overload protection when the drive motor 4 performs valve closing action. They can be linked with the overload protection circuit of the drive motor 4 respectively.

[0071] The normally closed contact DS of the high-voltage side tripping circuit breaker is located on the high-voltage side of the main transformer. When the high-voltage side of the main transformer is de-energized, the normally closed contact DS of the high-voltage side tripping circuit breaker closes and conducts.

[0072] like Figure 5 and Figure 6 As shown, in some embodiments, the control module 5 further includes: a switching switch SA, a local valve opening button SBO, and a local valve closing button SBC. The switching switch SA is located between the first terminal of the valve opening remote control switch PLCO and the live wire of the power output terminal, and between the first terminal of the valve closing remote control switch PLCC and the live wire of the power output terminal. The first terminal of the switching switch SA is connected to the live wire of the power output terminal. The second terminal of the switching switch SA is connected to the first terminal of both the valve opening remote control switch PLCO and the valve closing remote control switch PLCC. The first terminals of the local valve opening button SBO and the local valve closing button SBC are connected to the third terminal of the switching switch SA. The second terminal of the local valve opening button SBO is connected to the first terminal of the coil in the valve opening contactor KO, and the second terminal of the local valve closing button SBC is connected to the first terminal of the coil in the valve closing contactor KC.

[0073] When the first and second terminals of the switch SA are connected and the valve opening remote control switch PLCO is connected, or when the first and third terminals of the switch SA are connected and the local valve opening button SBO is connected, the first normally open contact of the valve opening contactor KO is connected, and the output shaft of the drive motor 4 rotates in the forward direction; when the first and second terminals of the switch SA are connected and the valve closing remote control switch PLCC is connected, or when the first and third terminals of the switch SA are connected and the local valve closing button SBC is connected, the first normally open contact of the valve closing contactor KC is connected, and the output shaft of the drive motor 4 rotates in the reverse direction.

[0074] The normally open contact of the switch SA is connected in series with the remote signal input terminal of the controller, and the normally open contact of the switch SA is turned on when the first and second terminals of the switch SA are connected.

[0075] It is understandable that, since the first terminal of the switch SA is connected to the live wire of the power output terminal, and the second terminal of the switch SA is connected to the first terminal of the valve opening remote control switch PLCO and the first terminal of the valve closing remote control switch PLCC respectively, when the first and second terminals of the switch SA are connected, the live wire of the power output terminal can be connected to the first terminal of the valve opening remote control switch PLCO and the first terminal of the valve closing remote control switch PLCC respectively. Furthermore, since the first terminal of the local valve opening button SBO and the first terminal of the local valve closing button SBC are connected to the third terminal of the switch SA respectively, when the first and third terminals of the switch SA are connected, the live wire of the power output terminal can be connected to the first terminal of the local valve opening button SBO and the first terminal of the local valve closing button SBC respectively.

[0076] Furthermore, since the second end of the local valve opening button SBO is connected to the first end of the coil in the valve opening contactor KO, the local valve opening button SBO can control the energization of the coil in the valve opening contactor KO. And since the second end of the local valve closing button SBC is connected to the first end of the coil in the valve closing contactor KC, the local valve closing button SBC can control the energization of the coil in the valve closing contactor KC.

[0077] Specifically, when the first and second terminals of the switching switch SA are connected and the valve opening remote control switch PLCO is connected, or when the first and third terminals of the switching switch SA are connected and the local valve opening button SBO is connected, the first normally open contact in the valve opening contactor KO is made to open, and the output shaft of the drive motor 4 is made to rotate in the positive direction, thereby realizing remote or local valve opening control.

[0078] When the first and second terminals of the switch SA are turned on and the valve-closing remote control switch PLCC is turned on, or when the first and third terminals of the switch SA are turned on and the local valve-closing button SBC is turned on, the first normally open contact in the valve-closing contactor KC is turned on, and the output shaft of the drive motor 4 is rotated in the opposite direction, thereby realizing remote or local valve-closing control.

[0079] In addition, since the normally open contact of the switch SA is connected in series with the remote signal input terminal of the controller, and the normally open contact of the switch SA is turned on when the first and second terminals of the switch SA are connected, the controller can obtain the switching state of the switch SA, thereby facilitating precise control.

[0080] The switch SA is used for switching between remote and local control. The specific type of switch SA can be set according to actual needs and is not limited thereto. The switch SA is used to switch between different channels via the knob SS.

[0081] The local valve opening button SBO is a local button used to control the opening of the valve, and the local valve closing button SBC is a local button used to control the closing of the valve. The local valve opening button SBO and the local valve closing button SBC can both be self-resetting buttons, that is, they are turned on when pressed and turned off when released.

[0082] like Figure 5 As shown, in some embodiments, the first end of the second normally open contact of the valve opening contactor KO is connected to the second end of the valve opening remote control switch PLCO in the controller and the second end of the local valve opening button SBO, respectively. The first end of the second normally open contact of the valve closing contactor KC is connected to the second end of the valve closing remote control switch PLCC in the controller and the second end of the local valve closing button SBC, respectively. The second end of the second normally open contact of the valve opening contactor KO and the second end of the second normally open contact of the valve closing contactor KC are connected to the first end of the switching switch SA, respectively.

[0083] Understandably, since the first end of the second normally open contact in the valve opening contactor KO is connected to the second end of the valve opening remote control switch PLCO and the second end of the local valve opening button SBO in the controller, and the second end of the second normally open contact in the valve opening contactor KO is connected to the first end of the switching switch SA, after the valve opening remote control switch PLCO or the local valve opening button SBO is turned on, the second normally open contact in the valve opening contactor KO is turned on and the valve opening contactor KO is self-locked, so that the drive motor 4 continues to rotate.

[0084] Since the first end of the second normally open contact in the valve closing contactor KC is connected to the second end of the valve closing remote control switch PLCC and the second end of the local valve closing button SBC in the controller, and the second end of the second normally open contact in the valve closing contactor KC is connected to the first end of the switching switch SA, after the valve closing remote control switch PLCC or the local valve closing button SBC is turned on, the second normally open contact in the valve closing contactor KC is turned on and the valve closing contactor KC is self-locked, so that the drive motor 4 continues to rotate.

[0085] Among them, the second normally open contact of the valve opening contactor KO is used for the self-holding function of the valve opening contactor KO, and the second normally open contact of the valve closing contactor KC is used for the self-holding function of the valve closing contactor KC.

[0086] like Figure 5As shown, in some embodiments, the normally closed contact of the valve opening contactor KO is connected in series between the second terminal of the valve closing remote control switch PLCC in the controller and the first terminal of the coil in the valve closing contactor KC, as well as between the second terminal of the local valve closing button SBC and the first terminal of the coil in the valve closing contactor KC. The first terminal of the normally closed contact of the valve opening contactor KO is connected to the second terminal of the valve closing remote control switch PLCC in the controller and the second terminal of the local valve closing button SBC, respectively. The second terminal of the normally closed contact of the valve opening contactor KO is connected to the first terminal of the coil in the valve closing contactor KC.

[0087] The normally closed contact of the valve closing contactor KC is connected in series between the second terminal of the valve opening remote control switch PLCO in the controller and the first terminal of the coil in the valve opening contactor KO, as well as between the second terminal of the local valve opening button SBO and the first terminal of the coil in the valve opening contactor KO. The first terminal of the normally closed contact of the valve closing contactor KC is connected to the second terminal of the valve opening remote control switch PLCO in the controller and the second terminal of the local valve opening button SBO, respectively. The second terminal of the normally closed contact of the valve closing contactor KC is connected to the first terminal of the coil in the valve opening contactor KO.

[0088] It is understandable that, since the first end of the normally closed contact in the valve opening contactor KO is connected to the second end of the valve closing remote control switch PLCC in the controller and the second end of the local valve closing button SBC respectively, and the second end of the normally closed contact in the valve opening contactor KO is connected to the first end of the coil in the valve closing contactor KC, and the first end of the normally closed contact in the valve closing contactor KC is connected to the second end of the valve opening remote control switch PLCO in the controller and the second end of the local valve opening button SBO respectively, and the second end of the normally closed contact in the valve closing contactor KC is connected to the first end of the coil in the valve opening contactor KO, an interlock is formed between the valve opening contactor KO and the valve closing contactor KC, ensuring the stable operation of the drive motor 4.

[0089] The normally closed contacts in the valve opening contactor KO and the valve closing contactor KC are used for the interlocking function between the valve opening contactor KO and the valve closing contactor KC.

[0090] It should be noted that in the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0091] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A remote-controlled electric drain valve for emergency oil discharge in a main transformer, characterized in that, include: Frame, manual shut-off valve, puncturer, drive motor and control module; The manual shut-off valve is mounted on the frame, and its inlet is connected to the drain end of the main transformer's oil tank. The drain end of the manual shut-off valve is connected to the inlet of the drain pipe. The drain end of the drain pipe is equipped with a glass plug, which is used to seal the drain end of the drain pipe. The puncturer is located at the oil discharge end of the oil drain pipe, and the firing end of the puncturer faces the glass stop plate. The driving end of the puncturer is connected to the operating rod of the manual shut-off valve. The drive motor is mounted on the frame, and the output shaft of the drive motor is connected to the operating lever of the manual shut-off valve. The signal output terminal of the control module is connected to the signal input terminal of the drive motor, and the control module is used to remotely control the output shaft of the drive motor to rotate in the forward direction, so as to drive the oil inlet and oil outlet of the manual shut-off valve to be connected through the operating rod of the manual shut-off valve and drive the firing end of the puncturer to be released, so that the firing end of the puncturer breaks the glass block. In addition, the output shaft of the drive motor is remotely controlled to rotate in the opposite direction so as to drive the oil inlet and outlet of the manual shut-off valve to shut off through the operating lever of the manual shut-off valve.

2. The remote-controlled main transformer emergency oil drain electric valve according to claim 1, characterized in that, The breakdown device includes: Support frame, retaining sleeve, firing spike, pin, and compression spring; The support frame is disposed at the oil drain end of the oil drain pipe, and the fixing sleeve is disposed on the support frame and close to the glass stop plate. The firing spike is slidably disposed in the fixing sleeve along the vertical direction of the glass stop plate. The pin is inserted into the fixing sleeve and passes through the firing spike. The compression spring is disposed between the firing spike and the support frame, and the compression spring applies a spring force toward the glass stop plate on the firing spike. The pin and the operating lever of the manual shut-off valve are connected by a transmission, and the control module is used to remotely control the output shaft of the drive motor to rotate in the forward direction, so as to drive the pin to move out of the firing spike and release the firing spike through the operating lever of the manual shut-off valve.

3. The remote-controlled main transformer emergency oil drain electric valve according to claim 2, characterized in that, The breakdown device also includes: Winches, pulley blocks, and wire ropes; The winch is sleeved on the operating rod of the manual shut-off valve, and the pulley block is rotatably mounted on the frame. The first end of the wire rope is wound around the winch, and the second end of the wire rope passes over the pulley block and is connected to the pin. The control module is used to remotely control the output shaft of the drive motor to rotate in the forward direction, so as to drive the winch to wind the wire rope through the operating lever of the manual shut-off valve, so that the pin is removed from the firing spike and the firing spike is released.

4. The remote-controlled main transformer emergency drain valve according to claim 1, characterized in that, The control module includes: Controller, valve opening contactor, and valve closing contactor; In this controller, the first terminal of the valve opening remote control switch is connected to the live wire of the power output terminal, the second terminal of the valve opening remote control switch is connected to the first terminal of the coil in the valve opening contactor, the second terminal of the coil in the valve opening contactor is connected to the neutral wire of the power output terminal, and the first normally open contact in the valve opening contactor is connected in series between the power output terminal and the forward rotation input terminal of the drive motor. When the valve opening remote control switch is turned on, the first normally open contact in the valve opening contactor is turned on, and the output shaft of the drive motor rotates in the forward direction. The first terminal of the remote control switch for closing the valve in the controller is connected to the live wire of the power output terminal. The second terminal of the remote control switch for closing the valve in the controller is connected to the first terminal of the coil in the valve closing contactor. The second terminal of the coil in the valve closing contactor is connected to the neutral wire of the power output terminal. The first normally open contact in the valve closing contactor is connected in series between the power output terminal and the reverse input terminal of the drive motor. When the remote control switch for closing the valve is turned on, the first normally open contact in the valve closing contactor is turned on, and the output shaft of the drive motor rotates in the reverse direction.

5. The remote-controlled main transformer emergency oil drain electric valve according to claim 4, characterized in that, The control module also includes: Limit switches for valve opening and valve closing; The valve opening limit switch is set at the first limit position of the manual shut-off valve. The normally closed contact of the valve opening limit switch is connected in series between the second end of the coil of the valve opening contactor and the neutral line of the power output terminal. When the oil inlet and oil outlet of the manual shut-off valve are connected and the valve is opened to the first limit position, the valve opening limit switch is energized and the normally closed contact of the valve opening limit switch is opened. The valve-closing limit switch is set at the second limit position of the manual shut-off valve. The normally closed contact of the valve-closing limit switch is connected in series between the second end of the coil of the valve-closing contactor and the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve are closed and the valve is closed to the second limit position, the valve-closing limit switch is energized and the normally closed contact of the valve-closing limit switch is opened.

6. The remote-controlled main transformer emergency oil drain electric valve according to claim 5, characterized in that, The control module also includes: Opening electromagnetic relay and closing electromagnetic relay; In this configuration, the first end of the coil in the valve opening electromagnetic relay is connected to the live wire of the power output terminal, and the second normally open contact in the valve opening electromagnetic relay is connected in series with the valve opening signal input terminal of the controller. The first end of the normally open contact in the valve opening limit switch is connected to the second end of the coil in the valve opening electromagnetic relay, and the second end of the normally open contact in the valve opening limit switch is connected to the neutral wire of the power output terminal. When the oil inlet and oil outlet of the manual shut-off valve are connected and the valve is opened to the first limit position, the normally open contact in the valve opening limit switch is activated, and the second normally open contact in the valve opening electromagnetic relay is activated. The first end of the coil in the valve-closing electromagnetic relay is connected to the live wire of the power output terminal, and the second normally open contact in the valve-closing electromagnetic relay is connected in series with the valve-closing signal input terminal of the controller. The first end of the normally open contact in the valve-closing limit switch is connected to the second end of the coil in the valve-closing electromagnetic relay, and the second end of the normally open contact in the valve-closing limit switch is connected to the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve are closed and the valve is closed to the second limit position, the normally open contact in the valve-closing limit switch is turned on, and the second normally open contact in the valve-closing electromagnetic relay is turned on.

7. The remote-controlled main transformer emergency oil drain electric valve according to claim 6, characterized in that, The control module also includes: Valve open indicator light, valve close indicator light, and power indicator light; Wherein, the first end of the first normally open contact of the valve opening electromagnetic relay is connected to the live wire of the power output terminal, and the first end of the valve opening indicator light is connected to the second end of the first normally open contact of the valve opening electromagnetic relay, and the second end of the valve opening indicator light is connected to the neutral wire of the power output terminal. Wherein, when the oil inlet and oil outlet of the manual shut-off valve are connected and the valve is opened to the first limit position, the first normally open contact of the valve opening electromagnetic relay is connected, and the valve opening indicator light is powered on and illuminated. The first end of the first normally open contact of the valve-closing electromagnetic relay is connected to the live wire of the power output terminal, and the first end of the valve-closing indicator light is connected to the second end of the first normally open contact of the valve-closing electromagnetic relay. The second end of the valve-closing indicator light is connected to the neutral wire of the power output terminal. When the oil inlet and outlet of the manual shut-off valve are closed and the valve is closed to the second limit position, the first normally open contact of the valve-closing electromagnetic relay is turned on, and the valve-closing indicator light is powered on and illuminated. The first end of the power indicator light is connected to the live wire of the power output terminal, and the second end of the power indicator light is connected to the neutral wire of the power output terminal.

8. The remote-controlled main transformer emergency oil drain electric valve according to claim 4, characterized in that, The control module also includes: Normally closed contact for valve opening overload, normally closed contact for tripping on the high-voltage side of the main transformer, and normally closed contact for valve closing overload; The normally closed valve overload contact is connected in series between the second end of the coil in the valve opening contactor and the neutral wire of the power output terminal, and the normally closed valve overload contact is used to disconnect when the output shaft of the drive motor rotates in the positive direction and an overload abnormality occurs. The normally closed contact of the high-voltage side tripping circuit breaker of the main transformer is connected in series between the second end of the coil in the valve opening contactor and the neutral line of the power output terminal, and the normally closed contact of the high-voltage side tripping circuit breaker of the main transformer is used to disconnect when the main transformer is energized. The normally closed valve overload contact is connected in series between the second end of the coil in the valve contactor and the neutral wire of the power output terminal, and the normally closed valve overload contact is used to disconnect when the output shaft of the drive motor rotates in the reverse direction and an overload abnormality occurs.

9. The remote-controlled main transformer emergency oil drain electric valve according to claim 4, characterized in that, The control module also includes: Switch, local valve opening button, and local valve closing button; The switching switch is located between the first terminal of the valve opening remote control switch and the live wire of the power output terminal, and between the first terminal of the valve closing remote control switch and the live wire of the power output terminal. The first terminal of the switching switch is connected to the live wire of the power output terminal. The second terminal of the switching switch is connected to the first terminal of the valve opening remote control switch and the first terminal of the valve closing remote control switch. The first terminal of the local valve opening button and the first terminal of the local valve closing button are connected to the third terminal of the switching switch. The second terminal of the local valve opening button is connected to the first terminal of the coil in the valve opening contactor. The second terminal of the local valve closing button is connected to the first terminal of the coil in the valve closing contactor. When the first and second terminals of the switching switch are connected and the valve opening remote control switch is connected, or when the first and third terminals of the switching switch are connected and the local valve opening button is connected, the first normally open contact in the valve opening contactor is connected, and the output shaft of the drive motor rotates in the positive direction. When the first and second terminals of the switching switch are connected and the valve-closing remote control switch is connected, or when the first and third terminals of the switching switch are connected and the local valve-closing button is connected, the first normally open contact in the valve-closing contactor is connected, and the output shaft of the drive motor is rotated in the reverse direction. The normally open contact of the switching switch is connected in series with the remote signal input terminal of the controller, and the normally open contact of the switching switch is turned on when the first terminal and the second terminal of the switching switch are connected.

10. The remote-controlled main transformer emergency oil drain electric valve according to claim 9, characterized in that, The first end of the second normally open contact in the valve opening contactor is connected to the second end of the valve opening remote control switch in the controller and the second end of the local valve opening button, respectively. The first end of the second normally open contact in the valve closing contactor is connected to the second end of the valve closing remote control switch in the controller and the second end of the local valve closing button, respectively. The second end of the second normally open contact in the valve opening contactor and the second end of the second normally open contact in the valve closing contactor are connected to the first end of the switching switch, respectively. And / or, The normally closed contact of the valve opening contactor is connected in series between the second terminal of the remote valve closing switch in the controller and the first terminal of the coil in the valve closing contactor, and between the second terminal of the local valve closing button and the first terminal of the coil in the valve closing contactor. The first terminal of the normally closed contact of the valve opening contactor is connected to the second terminal of the remote valve closing switch in the controller and the second terminal of the local valve closing button, respectively. The second terminal of the normally closed contact of the valve opening contactor is connected to the first terminal of the coil in the valve closing contactor. Similarly, the normally closed contact of the valve closing contactor is connected in series between the second terminal of the remote valve opening switch in the controller and the first terminal of the coil in the valve opening contactor, and between the second terminal of the local valve opening button and the first terminal of the coil in the valve opening contactor. The first terminal of the normally closed contact of the valve closing contactor is connected to the second terminal of the remote valve opening switch in the controller and the second terminal of the local valve opening button, respectively. The second terminal of the normally closed contact of the valve closing contactor is connected to the first terminal of the coil in the valve opening contactor.

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