A slow-speed prevention device and hydraulic operating mechanism

Abstract

The present application relates to the field of high-voltage switch, especially to a slow-opening-preventing device and a hydraulic operating mechanism. The slow-opening-preventing device comprises a signal cylinder and a signal rod installed in the signal cylinder, high-pressure oil enters the signal cylinder and pushes the signal rod to move and deform the elastic member; the slow-opening-preventing device further comprises a bracket, when the high-pressure oil cavity loses pressure, the signal rod reversely moves under the reaction force of the elastic member and drives the bracket to rotate, so that the bracket is blocked with the stop structure on the piston rod, thereby preventing the piston rod from retracting and opening. The signal rod is simultaneously subjected to the pressure of the hydraulic oil circuit and the elastic force of the elastic member, when the hydraulic oil circuit loses pressure, the signal rod is subjected to reduced pressure of the hydraulic oil, the elastic member drives the signal rod to reversely move, and further drives the bracket to rotate and block with the piston rod, thereby preventing the piston rod from retracting and opening, and further solving the problems of the prior art that the slow-opening-preventing device needs to be based on the movement direction of the energy storage disc spring and the piston rod, and the transmission links are many and the structure is complex.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switches, and more particularly to an anti-slow-opening device and a hydraulic operating mechanism. Background Technology

[0002] In high-voltage switchgear, there is a switch body consisting of stationary contacts and moving contacts. The moving contacts are controlled by an operating mechanism to perform opening and closing movements. Hydraulic operating mechanisms are also used for controlling moving contacts due to their advantages such as fast response speed, high control accuracy and large torque transmission. That is, the piston rod drives the movement of the moving contacts under the push of the hydraulic oil circuit.

[0003] Under normal circumstances, when the circuit is closed, the piston rod will push the moving contact and the stationary contact to fit tightly together. However, if the hydraulic operating mechanism loses pressure due to a malfunction, the moving contact will slowly separate from the stationary contact because it loses the power provided by the hydraulic operating mechanism. This will cause the moving and stationary contacts to gradually separate and generate a continuous arc, which will burn the contacts or even cause an explosion. Therefore, high-voltage switches using hydraulic operating mechanisms must be equipped with anti-slow-opening devices.

[0004] For example, Chinese utility model patent CN203085443U discloses a mechanical anti-slow-opening device for a hydraulic spring operating mechanism of a high-voltage circuit breaker. It includes a vertically arranged first and second anti-slow-opening rods, connected together via a crank arm. The first anti-slow-opening rod abuts against an energy storage disc spring assembly. When the hydraulic structure loses pressure, the energy storage disc spring moves upward, causing the first anti-slow-opening rod to move upward. This rotation is then transmitted to the second anti-slow-opening rod via the crank arm. The second anti-slow-opening rod then drives the anti-slow-opening bracket to rotate around a pivot, causing the anti-slow-opening bracket to abut against a connector. The connector cannot move to the right, preventing the piston rod from retracting and opening the circuit breaker, thus achieving the purpose of preventing slow opening.

[0005] However, in the above-mentioned patent, the movement direction of the energy storage disc spring is opposite to and perpendicular to the movement direction of the piston rod. The transmission mechanism needs to take into account the movement directions of the energy storage disc spring and the piston rod, and then make changes in direction. There are many transmission links, the structure is complex, and a large installation space is required, which places high demands on the installation space. Summary of the Invention

[0006] The purpose of this invention is to provide an anti-slow-displacement device to solve the problems of existing anti-slow-displacement devices requiring multiple transmission links and complex structures based on the movement direction of the energy storage disc spring and piston rod. Another purpose of this invention is to provide a hydraulic operating mechanism to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the anti-slow-split device of the present invention adopts the following technical solution:

[0008] An anti-slow-opening device includes a signal cylinder and a signal rod installed inside the signal cylinder. The signal cylinder has a communication port for communicating with a high-pressure oil chamber of a hydraulic operating mechanism, so that high-pressure oil enters the signal cylinder and pushes the signal rod to move when the piston rod of the hydraulic operating mechanism extends and closes the circuit. The anti-slow-opening device also includes an elastic element that cooperates with the signal rod to deform under force when the signal rod is pushed by the high-pressure oil. The anti-slow-opening device also includes a bracket for hinged to the hydraulic operating mechanism. The bracket has a bracket arm, and the signal rod has an outlet end that extends out of the signal cylinder. The outlet end is used to move in the opposite direction under the reaction force of the elastic element when the high-pressure oil chamber is depressurized, and directly or indirectly drive the bracket to rotate through a transmission structure, so that the end of the bracket arm rotates to engage with the joint at the end of the piston rod or the stop structure on the piston rod, thereby preventing the piston rod from retracting and opening the circuit.

[0009] The beneficial effects of the above technical solution are as follows: This invention innovatively proposes a new anti-slow-separation device. By setting a signal cylinder, which houses a signal rod and an elastic element that cooperates with the signal rod, and providing a connection port on the signal cylinder for connecting to the high-pressure oil chamber, the signal rod is simultaneously subjected to the pressure of the hydraulic oil circuit and the elastic force of the elastic element within the signal cylinder. When the hydraulic operating mechanism is working normally, the pressure of the hydraulic oil circuit is normal, and hydraulic oil enters the signal cylinder and pushes the signal rod to move, causing the elastic element to deform under force. Simultaneously, a through-end and a support that cooperates with the through-end are provided on the signal rod. When the hydraulic oil circuit loses pressure, the pressure of the hydraulic oil on the signal rod decreases. When the elastic force provided by the elastic element is greater than the pressure provided by the hydraulic oil, the elastic element drives the signal rod to move in the opposite direction, thereby causing the protruding end of the signal rod to directly or indirectly drive the bracket to rotate, causing the bracket arm to rotate. When it rotates to the position where it engages with the joint at the end of the piston rod or the stop structure on the piston rod, it can prevent the piston rod from retracting and opening the circuit. By utilizing the oil in the hydraulic circuit, the rotation of the bracket is directly controlled under the transmission drive of the signal rod. The transmission links are fewer, thus solving the problem that the existing anti-slow opening device requires the movement direction of the energy storage disc spring and the piston rod, resulting in many transmission links and complex structure.

[0010] Furthermore, the first end of the signal rod extends out of the signal cylinder to form the protruding end, and the second end of the signal rod is located inside the signal cylinder, with the end face of the second end being driven by high-pressure oil.

[0011] The beneficial effect of the above technical solution is that the second end of the signal rod is set inside the signal cylinder and is pushed by high-pressure oil, and the entire end face of the second end is subjected to force, resulting in a large force-bearing area.

[0012] Furthermore, the signal rod is provided with a protruding structure, and the signal rod includes a first rod segment and a second rod segment located on both sides of the protruding structure; the protruding end is located on the first rod segment, and the elastic element is a spring disposed inside the signal cylinder and sleeved outside the first rod segment, with the two ends of the spring abutting against the protruding structure and the inner wall of the signal cylinder respectively; the second end is located on the second rod segment, and the second rod segment is sealed to the inner wall of the signal cylinder.

[0013] The beneficial effects of the above technical solution are as follows: setting the protruding structure facilitates the setting of the elastic element; setting the elastic element as a spring makes it easy to pass through the signal rod and saves space; both the elastic element and the protruding structure are set in the signal cylinder body, saving space.

[0014] Furthermore, the signal cylinder includes a cylinder body and a cylinder cover connected to the cylinder body. The cylinder cover is provided with a stepped hole. The large-diameter section of the stepped hole is used to accommodate the spring. The inner diameter of the small-diameter section of the stepped hole is adapted to the outer diameter of the first rod section so that the first rod section can pass through. The cylinder body is provided with a stepped hole. The stepped hole includes a large-diameter hole for accommodating the protruding structure and a small-diameter hole for sealing with the second rod section. The connecting port communicates with the small-diameter hole.

[0015] The beneficial effects of the above technical solution are as follows: the stepped hole on the cylinder head facilitates the accommodation of the spring and the abutting fit with the spring; the stepped hole on the cylinder body accommodates the protruding structure and facilitates the sealing between the signal rod and the signal cylinder, preventing oil leakage; in addition, the cylinder body and cylinder head are set separately, which facilitates the accommodation and installation of the protruding structure and the spring during installation.

[0016] Furthermore, a connecting sleeve for connecting to the piston cylinder of the hydraulic operating mechanism is installed at the connection port.

[0017] The beneficial effect of the above technical solution is that it facilitates the sealing connection of hydraulic oil circuits.

[0018] Furthermore, the bracket is located on the side of the signal rod away from the protruding end. The signal rod indirectly drives the bracket to rotate through a transmission structure. The transmission structure includes a push rod set outside the signal cylinder and parallel to the signal rod. The protruding end of the signal rod is fixedly connected to the push rod through a connector. The push rod is hinged to the bracket.

[0019] The advantages of the above technical solution are: the movement of the signal rod is transmitted to the support, the signal rod and the top rod are arranged in parallel, which saves space and transmits a large torque.

[0020] Furthermore, the push rod is located above the signal rod, and a fixing plate is fixed on the signal cylinder for the push rod to pass through. The fixing plate includes two parallel side plates and a top plate connected between the tops of the two side plates. One of the two side plates is a long side plate and the other is a short side plate. The long side plate is fixed on the vertical side of the signal cylinder, and an extension plate extending away from the long side plate is vertically connected to the short side plate. The extension plate is fixed on the horizontal top surface of the signal cylinder.

[0021] The beneficial effects of the above technical solution are as follows: the connection between the fixing plate and the signal cylinder is compact, the signal cylinder is installed using its vertical side and horizontal top surface, and the fixing plate is provided with long side plates and short side plates. The installation of the push rod is more stable through the installation and fixing of the two side plates.

[0022] Furthermore, the connector is a vertically arranged connecting plate, and the extension plate is provided with a U-shaped limiting groove for limiting the position of the connecting plate.

[0023] The beneficial effect of the above technical solution is that the U-shaped limiting groove can prevent interference when the connecting plate moves, and at the same time restrict the connecting plate so that it does not rotate during the movement.

[0024] Furthermore, the connector is a connecting plate, the lower end of which is in contact with the end face of the signal rod. The anti-slow separation device also includes a first screw that passes through the lower end of the connecting plate and is threadedly connected to the signal rod. There is a gap between the upper end of the connecting plate and the end face of the top rod. The anti-slow separation device also includes a second screw that passes through the upper end of the connecting plate and is threadedly connected to the top rod. A nut is also connected to the second screw. The screw heads of the nut and the second screw are located on both sides of the connecting plate, respectively.

[0025] The beneficial effects of the above technical solution are as follows: the connecting plate and the signal rod are fixedly connected by the first screw, and the connecting plate and the top rod are fixedly connected by the second screw and nut, thereby fixing the signal rod and the top rod so that they can move together. Furthermore, the second screw and nut are provided on the top rod, and the position of the connecting plate is limited by the exposed length of the screw, thereby reducing the machining accuracy.

[0026] To achieve the above objectives, the hydraulic operating mechanism of this invention adopts the following technical solution:

[0027] A hydraulic operating mechanism includes a piston cylinder and a piston rod inserted within the piston cylinder for controlling the movement of a switch body. The piston cylinder includes a high-pressure oil chamber. An anti-slow-opening device includes a signal cylinder and a signal rod installed within the signal cylinder. The signal cylinder has a communication port for communicating with the high-pressure oil chamber of the hydraulic operating mechanism, allowing high-pressure oil to enter the signal cylinder and push the signal rod when the piston rod of the hydraulic operating mechanism extends to close the circuit. The anti-slow-opening device also includes an elastic element that cooperates with the signal rod to deform under force when the signal rod is pushed by the high-pressure oil. The anti-slow-opening device also includes a bracket hinged to the hydraulic operating mechanism. The bracket has a bracket arm, and the signal rod has an outlet end extending out of the signal cylinder. The outlet end is used to move in the opposite direction under the reaction force of the elastic element when the high-pressure oil chamber is depressurized, and directly or indirectly drive the bracket to rotate through a transmission structure, so that the end of the bracket arm rotates to engage with a joint at the end of the piston rod or a stop structure on the piston rod, thereby preventing the piston rod from retracting and opening the circuit.

[0028] The beneficial effects of the above technical solution are as follows: This invention improves the existing hydraulic operating mechanism by setting an anti-slow-gap device to prevent the piston rod from retracting when the hydraulic oil in the piston cylinder loses pressure. A signal cylinder is set on the anti-slow-gap bracket, and the signal cylinder contains a signal rod and an elastic element that cooperates with the signal rod. A connecting port for connecting to the high-pressure oil chamber is set on the signal cylinder, so that the signal rod is simultaneously subjected to the pressure of the hydraulic oil circuit and the elastic force of the elastic element in the signal cylinder. When the hydraulic operating mechanism is working normally, the pressure of the hydraulic oil circuit is normal, the hydraulic oil enters the signal cylinder and pushes the signal rod to move, and the elastic element is deformed by force. At the same time, an outlet end and a bracket that is driven by the outlet end are set on the signal rod. When the hydraulic oil circuit loses pressure, When pressed, the pressure on the signal rod decreases due to the hydraulic oil pressure. When the elastic force provided by the elastic element is greater than the pressure provided by the hydraulic oil, the elastic element drives the signal rod to move in the opposite direction. This causes the protruding end of the signal rod to directly or indirectly drive the bracket to rotate, making the bracket arm rotate. When it rotates to the position where it engages with the joint at the end of the piston rod or the stop structure on the piston rod, it can prevent the piston rod from retracting and opening the circuit. By utilizing the oil in the hydraulic circuit, the rotation of the bracket is directly controlled under the transmission drive of the signal rod. This reduces the number of transmission links and solves the problem of existing anti-slow-opening devices requiring multiple transmission links and complex structures based on the movement direction of the energy storage disc spring and piston rod.

[0029] Furthermore, the first end of the signal rod extends out of the signal cylinder to form the protruding end, and the second end of the signal rod is located inside the signal cylinder, with the end face of the second end being driven by high-pressure oil.

[0030] The beneficial effect of the above technical solution is that the second end of the signal rod is set inside the signal cylinder and is pushed by high-pressure oil, and the entire end face of the second end is subjected to force, resulting in a large force-bearing area.

[0031] Furthermore, the signal rod is provided with a protruding structure, and the signal rod includes a first rod segment and a second rod segment located on both sides of the protruding structure; the protruding end is located on the first rod segment, and the elastic element is a spring disposed inside the signal cylinder and sleeved outside the first rod segment, with the two ends of the spring abutting against the protruding structure and the inner wall of the signal cylinder respectively; the second end is located on the second rod segment, and the second rod segment is sealed to the inner wall of the signal cylinder.

[0032] The beneficial effects of the above technical solution are as follows: setting the protruding structure facilitates the setting of the elastic element; setting the elastic element as a spring makes it easy to pass through the signal rod and saves space; both the elastic element and the protruding structure are set in the signal cylinder body, saving space.

[0033] Furthermore, the signal cylinder includes a cylinder body and a cylinder cover connected to the cylinder body. The cylinder cover is provided with a stepped hole. The large-diameter section of the stepped hole is used to accommodate the spring. The inner diameter of the small-diameter section of the stepped hole is adapted to the outer diameter of the first rod section so that the first rod section can pass through. The cylinder body is provided with a stepped hole. The stepped hole includes a large-diameter hole for accommodating the protruding structure and a small-diameter hole for sealing with the second rod section. The connecting port communicates with the small-diameter hole.

[0034] The beneficial effects of the above technical solution are as follows: the stepped hole on the cylinder head facilitates the accommodation of the spring and the abutting fit with the spring; the stepped hole on the cylinder body accommodates the protruding structure and facilitates the sealing between the signal rod and the signal cylinder, preventing oil leakage; in addition, the cylinder body and cylinder head are set separately, which facilitates the accommodation and installation of the protruding structure and the spring during installation.

[0035] Furthermore, a connecting sleeve for connecting to the piston cylinder of the hydraulic operating mechanism is installed at the connection port.

[0036] The beneficial effect of the above technical solution is that it facilitates the sealing connection of hydraulic oil circuits.

[0037] Furthermore, the bracket is located on the side of the signal rod away from the protruding end. The signal rod indirectly drives the bracket to rotate through a transmission structure. The transmission structure includes a push rod set outside the signal cylinder and parallel to the signal rod. The protruding end of the signal rod is fixedly connected to the push rod through a connector. The push rod is hinged to the bracket.

[0038] The advantages of the above technical solution are: the movement of the signal rod is transmitted to the support, the signal rod and the top rod are arranged in parallel, which saves space and transmits a large torque.

[0039] Furthermore, the push rod is located above the signal rod, and a fixing plate is fixed on the signal cylinder for the push rod to pass through. The fixing plate includes two parallel side plates and a top plate connected between the tops of the two side plates. One of the two side plates is a long side plate and the other is a short side plate. The long side plate is fixed on the vertical side of the signal cylinder, and an extension plate extending away from the long side plate is vertically connected to the short side plate. The extension plate is fixed on the horizontal top surface of the signal cylinder.

[0040] The beneficial effects of the above technical solution are as follows: the connection between the fixing plate and the signal cylinder is compact, the signal cylinder is installed using its vertical side and horizontal top surface, and the fixing plate is provided with long side plates and short side plates. The installation of the push rod is more stable through the installation and fixing of the two side plates.

[0041] Furthermore, the connector is a vertically arranged connecting plate, and the extension plate is provided with a U-shaped limiting groove for limiting the position of the connecting plate.

[0042] The beneficial effect of the above technical solution is that the U-shaped limiting groove can prevent interference when the connecting plate moves, and at the same time restrict the connecting plate so that it does not rotate during the movement.

[0043] Furthermore, the connector is a connecting plate, the lower end of which is in contact with the end face of the signal rod. The anti-slow separation device also includes a first screw that passes through the lower end of the connecting plate and is threadedly connected to the signal rod. There is a gap between the upper end of the connecting plate and the end face of the top rod. The anti-slow separation device also includes a second screw that passes through the upper end of the connecting plate and is threadedly connected to the top rod. A nut is also connected to the second screw. The screw heads of the nut and the second screw are located on both sides of the connecting plate, respectively.

[0044] The beneficial effects of the above technical solution are as follows: the connecting plate and the signal rod are fixedly connected by the first screw, and the connecting plate and the top rod are fixedly connected by the second screw and nut, thereby fixing the signal rod and the top rod so that they can move together. Furthermore, the second screw and nut are provided on the top rod, and the position of the connecting plate is limited by the exposed length of the screw, thereby reducing the machining accuracy. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the hydraulic operating mechanism in this invention;

[0046] Figure 2 for Figure 1 A cross-sectional schematic diagram of the embodiment shown (with normal pressure);

[0047] Figure 3 for Figure 1 A cross-sectional schematic diagram of the embodiment shown (in the depressurization state);

[0048] In the diagram: 11. Cylinder head; 12. Cylinder block; 13. Connecting sleeve; 2. Signal rod; 21. First rod segment; 22. Second rod segment; 23. Boss; 24. Spring; 3. Connecting plate; 4. Push rod; 41. Connecting pin; 42. Fixing plate; 421. Extension plate; 5. Bracket; 51. Hinge shaft; 52. Bracket arm; 6. Piston cylinder; 61. Piston rod; 71. First screw; 72. Second screw; 73. Nut. Detailed Implementation

[0049] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0050] Embodiment 1 of the hydraulic operating mechanism in this invention:

[0051] In this embodiment, a slow-split device is used to prevent the hydraulic rod from retracting when the hydraulic oil loses pressure. A signal rod is fixedly connected to the push rod in the slow-split device. The signal rod is located in a signal cylinder, which is connected to the hydraulic oil circuit. At this time, a spring is installed on the signal rod. The signal rod is simultaneously subjected to the pressure of the hydraulic oil and the elastic force of the spring. When the hydraulic oil circuit loses pressure, the elastic force of the spring on the signal rod is greater than the force provided by the hydraulic oil circuit. At this time, the signal rod moves under the reaction force of the spring. The corresponding signal rod will drive the push rod to move, and then drive the slow-split support to move.

[0052] Specifically, such as Figure 1 and Figure 2 As shown, the hydraulic operating mechanism includes a piston cylinder 6 and a piston rod 61 that extends and retracts within the piston cylinder 6. A high-pressure oil chamber is provided within the piston cylinder 6. The hydraulic operating mechanism also includes an anti-slow-separation device mounted on the piston cylinder 6. The anti-slow-separation device includes a signal cylinder and a signal rod 2 passing through the signal cylinder. A fixing plate 42 is provided on the signal cylinder for mounting a push rod 4, which is arranged parallel to the signal rod 2. One end of the push rod 4 is fixedly connected to the signal rod 2, and the other end is connected to the bracket 5 via a connecting pin 41.

[0053] The signal rod 2 includes a boss 23 extending radially from the middle position of the signal rod. The boss 23 serves as a protruding structure in this embodiment, and its two sides are divided into a first rod segment 21 and a second rod segment 22. A spring 24 is sleeved on the first rod segment 21, and the portion of the first rod segment 21 that extends out of the signal cylinder forms an exit end. The second rod segment 22 is disposed inside the signal cylinder.

[0054] The signal cylinder includes a cylinder body 12 and a cylinder head 11. The cylinder head 11 has a stepped hole. The smaller section of the stepped hole allows the first rod segment 21 to pass through, while the larger section accommodates the spring 24. At this time, the two end faces of the spring 24 abut against the boss 23 and the cylinder head 11, respectively. The cylinder body 12 has a stepped hole, which includes a large-diameter hole and a small-diameter hole. The large-diameter hole accommodates the boss 23 on the signal rod 2, while the small-diameter hole allows the second rod segment 22 of the signal rod to pass through. A connecting hole is opened on the contact surface of the cylinder body 12 with the piston cylinder 6 and extends upward to the small-diameter hole to communicate with it. A connecting sleeve 13 is provided in the connecting hole to communicate with the high-pressure oil chamber in the piston cylinder 6. The second rod segment 22 of the signal rod 2 is provided with multiple layers of sealing rings to seal with the small-diameter hole. The end face of the second rod segment 22 is in direct contact with the high-pressure oil.

[0055] A fixing plate 42 is installed above the signal cylinder and includes two parallel side plates and a top plate connecting the tops of the two side plates. One of the side plates is a long side plate and the other is a short side plate. The long side plate is fixed to the vertical side of the signal cylinder, and an extension plate 421 extending away from the long side plate is vertically connected to the short side plate. The extension plate 421 is fixed to the horizontal top surface of the signal cylinder and has a U-shaped limiting groove. Openings are provided on the long and short side plates for the top rod 4 to pass through.

[0056] A threaded hole is provided on the protruding end of the signal rod 2, and a threaded hole is also provided on the parallel top rod 4. The first screw 71 passes through the connecting plate 3 and connects with the threaded hole on the signal rod, thereby fixing the connecting plate 3 to the signal rod 2. The end face of the top rod 4 is spaced from the connecting plate 3. A second screw 72 is provided on the threaded hole of the top rod 4, passing through the connecting plate 3. After the second screw 72 is tightened, a part of the threaded section is still exposed. A nut 73 is also provided on the second screw 72, and the screw heads of the nut 73 and the second screw 72 are respectively located on both sides of the connecting plate 3. The connecting plate is limited by the compression of the screw heads and the nut 73, thereby fixing the signal rod 2, the top rod 4, and the connecting plate 3 together so that they can move together. During the movement, the U-shaped limiting groove on the extension plate 421 limits the stroke of the connecting plate 3 to prevent shaking and rotation.

[0057] The end of the push rod 4 furthest from the connecting plate 3 is used for hinged connection with the bracket. Correspondingly, a connecting pin 41 is provided on the push rod 4, and an elongated hole is provided on the bracket 5 to connect with the connecting pin 41. The bracket 5 is fixed to the hydraulic operating mechanism through the hinge shaft 51. Driven by the push rod 4, the bracket 5 can rotate around the hinge shaft 51.

[0058] like Figure 3As shown, when the hydraulic oil in piston cylinder 6 loses pressure due to a malfunction, signal rod 2 moves to the right under the action of spring 24. This moves push rod 4 to the right via connecting plate 3. Because bracket 5 is connected to connecting pin 41 on push rod 4 through a long slot, as connecting pin 41 moves to the right, bracket 5 rotates around hinge axis 51 to adapt to the new hole position. This causes bracket arm 52 on bracket 5 to rotate. With the rotation of bracket arm 52, the end of bracket arm 52 engages with the joint of piston rod 61, preventing piston rod 61 from retracting. When the hydraulic oil pressure returns to normal, as... Figure 2 As shown, when the pressure in the hydraulic circuit is greater than the spring force of spring 24, it will cause the signal rod 2 to return to its original position, which will in turn cause the bracket 5 to return to its original position. Of course, in other embodiments, a stop structure and a bracket arm can be set on the piston rod to stop the piston rod.

[0059] In Embodiment 2 of the hydraulic operating mechanism of this invention, a new arrangement is proposed for the connecting plate. Specifically, unlike Embodiment 1 where threaded holes are provided on the signal rod and the top rod for installation and connection using two screws, this embodiment still provides threaded holes on the signal rod and a threaded section on the top rod. The threaded section passes through the hole on the connecting plate, and two nuts are provided on the threaded section, located on both sides of the connecting plate. The position of the fixing plate on the top rod can be adjusted by adjusting the position of the two nuts. Of course, in other embodiments, the connecting plate may not be provided, and a bent plate integrally formed on the top rod may be used. The bent plate is bent at 90 degrees and extends towards the signal rod, and is connected to the signal rod through the hole on the bent plate.

[0060] In Embodiment 3 of the hydraulic operating mechanism of this invention, a new arrangement is proposed for the extension plate. Specifically, unlike Embodiment 1 where a U-shaped limiting groove is provided on the extension plate to limit the connecting plate, the extension plate in this embodiment is shorter and does not extend beyond the side of the signal cylinder. Of course, in other embodiments, the extension plate may not be provided, and the short side plate of the fixing plate may be directly welded and fixed to the signal cylinder.

[0061] In Embodiment 4 of the hydraulic operating mechanism of this invention: Regarding the mounting structure of the push rod, this embodiment proposes a new arrangement. Specifically, unlike Embodiment 1 where a fixing plate is fixedly mounted on the signal cylinder, this embodiment welds a vertical plate with perforations onto the signal cylinder body. The push rod passes through the vertical plate to define its position. Of course, in other embodiments, a fixing plate may not be provided, and the position of the push rod may be directly defined by the signal rod and the connecting plate.

[0062] In Embodiment 5 of the hydraulic operating mechanism of this invention: Regarding the arrangement of the push rod, this embodiment proposes a new arrangement. Specifically, unlike Embodiment 1, which has a connecting pin on the push rod for connection with the bracket, this embodiment does not have a push rod. The end face of the second end of the signal rod contacts the high-pressure hydraulic fluid, and a first end is provided on the end face of the second end, extending out of the signal cylinder to form an extended end. At this time, hydraulic oil acts on part of the end face of the second end, and the extended end is directly hinged to the bracket. The extended end of the signal rod directly drives the bracket to rotate and stops it at the joint at the end of the piston rod when pressure is lost.

[0063] In Embodiment 6 of the hydraulic operating mechanism of this invention, a new arrangement is proposed for the connecting sleeve. Specifically, unlike Embodiment 1 which has a connecting sleeve at the connection port, this embodiment has a quick-connect female connector at the connection port and a quick-connect male connector on the piston cylinder, enabling rapid connection of the hydraulic circuit through the quick-connect structure. Alternatively, the connecting sleeve can be omitted, and the user can configure it themselves.

[0064] In Embodiment 7 of the hydraulic operating mechanism of this invention: Regarding the arrangement of the cylinder body and cylinder head, this embodiment proposes a new arrangement. Specifically, unlike Embodiment 1 where the cylinder body and cylinder head are set separately, in this embodiment the signal cylinder is composed of two cylinder bodies joined together. The two cylinder bodies are fixedly connected by bolts, and a sealing ring is provided between the cylinder bodies. The connection of the bolts allows the two cylinder bodies to be joined together to form a space that can accommodate the spring and the boss.

[0065] In Embodiment 8 of the hydraulic operating mechanism of this invention: For the protruding structure on the signal rod, this embodiment proposes a new arrangement. Specifically, unlike Embodiment 1 where a spring is sleeved on the signal rod, this embodiment provides a disc spring at the extended end of the signal rod, which acts directly on the end face of the signal rod.

[0066] An embodiment of the anti-slow-separation device in this invention: The structure of the anti-slow-separation device in this invention is the same as that of the anti-slow-separation device in any embodiment of the hydraulic operating mechanism described above, and will not be repeated here.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A device for preventing slow separation, characterized in that: The device includes a signal cylinder and a signal rod installed inside the signal cylinder. The signal cylinder has a communication port for connecting to the high-pressure oil chamber of the hydraulic operating mechanism, allowing high-pressure oil to enter the signal cylinder and push the signal rod when the piston rod of the hydraulic operating mechanism extends and closes the circuit. The anti-slow-opening device also includes an elastic element that cooperates with the signal rod to deform under force when the signal rod is pushed by the high-pressure oil. The signal rod has a protruding structure and includes a first rod segment and a second rod segment located on both sides of the protruding structure. The elastic element is a spring installed inside the signal cylinder and sleeved on the outside of the first rod segment, with both ends of the spring abutting against the protruding structure and the inner wall of the signal cylinder, respectively. The slow-opening device also includes a bracket for hinged to the hydraulic operating mechanism. The bracket has a bracket arm and a protruding end on the first rod segment that extends out of the signal cylinder. The bracket is located on the side of the signal rod away from the protruding end. The protruding end is used to move in the opposite direction under the reaction force of the elastic element when the high-pressure oil chamber loses pressure, and indirectly drive the bracket to rotate through the transmission structure, so that the end of the bracket arm rotates to engage with the joint at the end of the piston rod or the stop structure on the piston rod, thereby preventing the piston rod from retracting and opening the circuit. The transmission structure includes a push rod disposed outside the signal cylinder and parallel to the signal rod. The protruding end is fixedly connected to the push rod through a connector, and the push rod is hinged to the bracket.

2. The anti-slow-split device according to claim 1, characterized in that: The second rod segment, located at the end face inside the signal cylinder, is driven by high-pressure hydraulic fluid.

3. The anti-slow-split device according to claim 1, characterized in that: The second rod section is sealed to the inner wall of the signal cylinder.

4. The anti-slow-separation device according to claim 3, characterized in that: The signal cylinder includes a cylinder body and a cylinder cover connected to the cylinder body. The cylinder cover has a stepped hole. The larger section of the stepped hole is used to accommodate the spring. The inner diameter of the smaller section of the stepped hole is adapted to the outer diameter of the first rod section so that the first rod section can pass through. The cylinder body has a stepped hole. The stepped hole includes a large-diameter hole for accommodating the protruding structure and a small-diameter hole for sealing with the second rod section. The connecting port communicates with the small-diameter hole.

5. The anti-slow-departure device according to any one of claims 1-4, characterized in that: A connecting sleeve for connecting to the piston cylinder of the hydraulic operating mechanism is installed at the connection port.

6. The anti-slow-split device according to any one of claims 1-4, characterized in that: The push rod is located above the signal rod. A fixing plate is fixed on the signal cylinder for the push rod to pass through. The fixing plate includes two parallel side plates and a top plate connected between the tops of the two side plates. One of the two side plates is a long side plate and the other is a short side plate. The long side plate is fixed on the vertical side of the signal cylinder. An extension plate extending away from the long side plate is vertically connected to the short side plate. The extension plate is fixed on the horizontal top surface of the signal cylinder.

7. The anti-slow-separation device according to claim 6, characterized in that: The connector is a vertically arranged connecting plate, and the extension plate is provided with a U-shaped limiting groove for limiting the position of the connecting plate.

8. The anti-slow-split device according to any one of claims 1-4, characterized in that: The connector is a connecting plate, with its lower end in contact with the end face of the signal rod. The anti-slow separation device also includes a first screw that passes through the lower end of the connecting plate and is threadedly connected to the signal rod. There is a gap between the upper end of the connecting plate and the end face of the top rod. The anti-slow separation device also includes a second screw that passes through the upper end of the connecting plate and is threadedly connected to the top rod. A nut is also connected to the second screw. The heads of the nut and the second screw are located on both sides of the connecting plate, respectively.

9. A device for preventing slow separation, characterized in that: The device includes a signal cylinder and a signal rod installed inside the signal cylinder. The signal cylinder has a communication port for communicating with the high-pressure oil chamber of the hydraulic operating mechanism, so that high-pressure oil enters the signal cylinder and pushes the signal rod to move when the piston rod of the hydraulic operating mechanism extends and closes the circuit. The anti-slow-opening device also includes an elastic element that cooperates with the signal rod to deform under force when the signal rod is pushed by the high-pressure oil. The anti-slow-opening device also includes a bracket for hinged to the hydraulic operating mechanism. The bracket has a bracket arm. The signal rod has a protruding structure. The signal rod includes a first rod segment and a second rod segment located on both sides of the protruding structure. The segment has a second end, and the elastic element is a spring installed inside the signal cylinder and sleeved outside the first rod segment. The two ends of the spring abut against the protruding structure and the inner wall of the signal cylinder, respectively. The end face of the second end is provided with an outlet end that passes through the signal cylinder. Hydraulic oil acts on the end face of the second end of the segment. The outlet end is directly hinged to the bracket. The outlet end is used to move in the opposite direction under the reaction force of the elastic element when the high-pressure oil chamber loses pressure and directly drive the bracket to rotate, so that the end of the bracket arm rotates to engage with the joint at the end of the piston rod or the stop structure on the piston rod, thereby preventing the piston rod from retracting and opening the circuit.

10. The anti-slow-separation device according to claim 9, characterized in that: The second rod section is sealed to the inner wall of the signal cylinder.

11. The anti-slow-split device according to claim 10, characterized in that: The signal cylinder includes a cylinder body and a cylinder cover connected to the cylinder body. The cylinder cover has a stepped hole. The larger section of the stepped hole is used to accommodate the spring. The inner diameter of the smaller section of the stepped hole is adapted to the outer diameter of the first rod section so that the first rod section can pass through. The cylinder body has a stepped hole. The stepped hole includes a large-diameter hole for accommodating the protruding structure and a small-diameter hole for sealing with the second rod section. The connecting port communicates with the small-diameter hole.

12. The anti-slow-split device according to any one of claims 9-11, characterized in that: A connecting sleeve for connecting to the piston cylinder of the hydraulic operating mechanism is installed at the connection port.

13. A hydraulic operating mechanism, comprising a piston cylinder and a piston rod disposed within the piston cylinder for controlling the movement of a switch body, the piston cylinder including a high-pressure oil chamber, characterized in that: The hydraulic operating mechanism also includes an anti-slow-break device, which comprises a signal cylinder and a signal rod installed inside the signal cylinder. The signal cylinder has a communication port for communicating with the high-pressure oil chamber of the hydraulic operating mechanism, so that high-pressure oil enters the signal cylinder and pushes the signal rod when the piston rod of the hydraulic operating mechanism extends and closes. The anti-slow-break device also includes an elastic element that cooperates with the signal rod to deform under force when the signal rod is pushed by the high-pressure oil. The signal rod has a protruding structure and includes a first rod segment and a second rod segment located on both sides of the protruding structure. The elastic element is a spring installed inside the signal cylinder and sleeved on the outside of the first rod segment, with both ends of the spring abutting against the inner walls of the protruding structure and the signal cylinder, respectively. The anti-slow-break device also... The device includes a bracket hinged to a hydraulic operating mechanism. The bracket has a bracket arm and a first rod segment with an outlet end extending through a signal cylinder. The bracket is located on the side of the signal rod away from the outlet end. The outlet end is used to move in the opposite direction under the reaction force of the elastic element when the high-pressure oil chamber loses pressure, and indirectly drives the bracket to rotate through a transmission structure. This causes the end of the bracket arm to rotate to engage with the joint at the end of the piston rod or the stop structure on the piston rod, thereby preventing the piston rod from retracting and opening the circuit. The transmission structure includes a push rod disposed outside the signal cylinder and parallel to the signal rod. The outlet end is fixedly connected to the push rod through a connector. The push rod is hinged to the bracket. The piston cylinder is provided with a connecting port that connects the high-pressure oil chamber and the anti-slow-opening device.

14. The hydraulic operating mechanism according to claim 13, characterized in that: The second rod segment, located at the end face inside the signal cylinder, is driven by high-pressure hydraulic fluid.

15. The hydraulic operating mechanism according to claim 13, characterized in that: The second rod section is sealed to the inner wall of the signal cylinder.

16. The hydraulic operating mechanism according to claim 15, characterized in that: The signal cylinder includes a cylinder body and a cylinder cover connected to the cylinder body. The cylinder cover has a stepped hole. The larger section of the stepped hole is used to accommodate the spring. The inner diameter of the smaller section of the stepped hole is adapted to the outer diameter of the first rod section so that the first rod section can pass through. The cylinder body has a stepped hole. The stepped hole includes a large-diameter hole for accommodating the protruding structure and a small-diameter hole for sealing with the second rod section. The connecting port communicates with the small-diameter hole.

17. The hydraulic operating mechanism according to any one of claims 13-16, characterized in that: A connecting sleeve for connecting to the piston cylinder of the hydraulic operating mechanism is installed at the connection port.

18. The hydraulic operating mechanism according to any one of claims 13-16, characterized in that: The push rod is located above the signal rod. A fixing plate is fixed on the signal cylinder for the push rod to pass through. The fixing plate includes two parallel side plates and a top plate connected between the tops of the two side plates. One of the two side plates is a long side plate and the other is a short side plate. The long side plate is fixed on the vertical side of the signal cylinder. An extension plate extending away from the long side plate is vertically connected to the short side plate. The extension plate is fixed on the horizontal top surface of the signal cylinder.

19. The hydraulic operating mechanism according to claim 18, characterized in that: The connector is a vertically arranged connecting plate, and the extension plate is provided with a U-shaped limiting groove for limiting the position of the connecting plate.

20. The hydraulic operating mechanism according to any one of claims 13-16, characterized in that: The connector is a connecting plate, with its lower end in contact with the end face of the signal rod. The anti-slow separation device also includes a first screw that passes through the lower end of the connecting plate and is threadedly connected to the signal rod. There is a gap between the upper end of the connecting plate and the end face of the top rod. The anti-slow separation device also includes a second screw that passes through the upper end of the connecting plate and is threadedly connected to the top rod. A nut is also connected to the second screw. The heads of the nut and the second screw are located on both sides of the connecting plate, respectively.

21. A hydraulic operating mechanism, comprising a piston cylinder and a piston rod disposed within the piston cylinder for controlling the movement of a switch body, the piston cylinder including a high-pressure oil chamber, characterized in that: The hydraulic operating mechanism also includes an anti-slow-opening device, which comprises a signal cylinder and a signal rod installed inside the signal cylinder. The signal cylinder has a communication port for communicating with the high-pressure oil chamber of the hydraulic operating mechanism, so that high-pressure oil enters the signal cylinder and pushes the signal rod to move when the piston rod of the hydraulic operating mechanism extends and closes. The anti-slow-opening device also includes an elastic element that cooperates with the signal rod to deform under force when the signal rod is pushed by the high-pressure oil. The anti-slow-opening device also includes a bracket for hinged to the hydraulic operating mechanism, the bracket having a bracket arm. The signal rod has a protruding structure, and the signal rod includes a first rod segment and a second rod segment located on both sides of the protruding structure. The second rod segment has a first rod segment... At both ends, the elastic element is a spring installed inside the signal cylinder and sleeved outside the first rod section. The two ends of the spring abut against the protruding structure and the inner wall of the signal cylinder, respectively. The end face of the second end is provided with an outlet end that passes through the signal cylinder. The hydraulic oil acts on the end face of the second end. The outlet end is directly hinged to the bracket. The outlet end is used to move in the opposite direction under the reaction force of the elastic element when the high-pressure oil chamber loses pressure and directly drive the bracket to rotate, so that the end of the bracket arm rotates to engage with the joint at the end of the piston rod or the stop structure on the piston rod, thereby preventing the piston rod from retracting and opening the circuit. The piston cylinder is provided with a connecting oil port that connects the high-pressure oil chamber and the anti-slow opening device.

22. The hydraulic operating mechanism according to claim 21, characterized in that: The second rod section is sealed to the inner wall of the signal cylinder.

23. The hydraulic operating mechanism according to claim 22, characterized in that: The signal cylinder includes a cylinder body and a cylinder cover connected to the cylinder body. The cylinder cover has a stepped hole. The larger section of the stepped hole is used to accommodate the spring. The inner diameter of the smaller section of the stepped hole is adapted to the outer diameter of the first rod section so that the first rod section can pass through. The cylinder body has a stepped hole. The stepped hole includes a large-diameter hole for accommodating the protruding structure and a small-diameter hole for sealing with the second rod section. The connecting port communicates with the small-diameter hole.

24. The hydraulic operating mechanism according to any one of claims 21-23, characterized in that: A connecting sleeve for connecting to the piston cylinder of the hydraulic operating mechanism is installed at the connection port.

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