Automatic pressing device for movable contact of annealing furnace

Abstract

The utility model relates to the technical field of control, and particularly discloses an annealing furnace moving contact automatic pressing device which comprises a mounting plate, a plurality of static contacts are fixed in the middle of the surface of the front side of the mounting plate, a movable linkage plate is arranged on the upper portion of the surface of the front side of the mounting plate, and a plurality of matched moving contacts corresponding to the static contacts are arranged on the lower side of the linkage plate. According to the utility model, under the action of the top spring, when the guide rod is pushed downwards, the guide rod drives the movable contact to move synchronously through the linkage plate, that is, the movable contact is gradually close to the static contact until the movable contact and the static contact are combined; according to the utility model, the guide rod synchronously applies an acting force for pushing the movable contact to approach the static contact, so that the movable contact always automatically presses the static contact, that is, vibration generated in the operation process of external equipment cannot easily separate the static contact from the movable contact, and the firmness of combination between the contacts is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of control technology, and in particular to an automatic pressing device for the moving contacts of an annealing furnace. Background Technology

[0002] Chinese Patent Application No. 201921955845.0 discloses a knife switch for a annealing furnace, comprising an annealing furnace, a furnace base, and a furnace cover. An upper support and a lower support are respectively located on the outer wall of the furnace cover and the furnace base on the same side. The upper and lower supports have corresponding upper and lower contacts, respectively. Both upper and lower contacts are connected to a power supply and the power terminals of the annealing furnace via wires. Its key feature is that there are bearing seats on both sides of the lower contact, with a rotating shaft between the two bearing seats. A disc is fixed at both ends of the rotating shaft, and a cover plate with an arc cross-section connects the outer edges of the two discs. One of the discs has a pin and a counterweight on its outer side, respectively. In the non-closed state, the pin and counterweight are located on the upper and lower sides of their respective discs. A wedge block is fixed on the upper support corresponding to the disc with the pin. The wedge block is arranged vertically with a wedge edge at the bottom, which corresponds to the pin on the disc. When the switch is closed, the wedge edge and the pin cause the disc to rotate counterclockwise until the line connecting the pin and the counterweight changes from vertical to horizontal, so that the cover plate rotates above the upper and lower contacts.

[0003] While the aforementioned technology can prevent external debris from entering the contact point to a certain extent, the lack of an automatic clamping component leads to poor contact due to frequent opening and closing of the contacts and vibration during equipment operation, resulting in the equipment failing to operate normally. Therefore, in order to solve the above technical problems, we propose an automatic clamping device for the moving contacts of an annealing furnace. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic pressing device for the moving contacts of an annealing furnace.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic pressing device for moving contacts of an annealing furnace includes a mounting plate. Several stationary contacts are fixed in the middle of the front surface of the mounting plate. A movable linkage plate is provided on the upper part of the front surface of the mounting plate. Several cooperating moving contacts are provided on the lower side of the linkage plate corresponding to the stationary contacts. A protective cover is provided on the front side of the mounting plate corresponding to the stationary contacts. Guide rods are fixed near the ends of both ends of the linkage plate. Mounting seats are slidably sleeved on the rods of the guide rods. The mounting seats are fixed on the surface of the mounting plate. A top spring is provided between the end of the guide rod away from the mounting seat and the mounting seat. A push frame is installed at the end of the guide rod away from the linkage plate. A locking component is provided between the push frame and the mounting plate.

[0007] Preferably, the locking assembly includes a blocking bar and a socket. The socket is disposed on the plate body of the mounting plate and close to the mounting base. The blocking bar is attached to the side of the push frame, and the diameter of the blocking bar is one-tenth of the diameter of the socket.

[0008] Preferably, an electric actuator is provided on one side of the mounting plate. The electric actuator is connected to a power source via a wire, and the output end of the electric actuator is connected to the end of one end of the linkage plate.

[0009] Preferably, the protective cover has a partition plate inside, which is located between the two stationary contacts.

[0010] Preferably, the protective cover has several heat dissipation holes, and both the protective cover and the partition plate have an insulating coating.

[0011] Preferably, the outer side of the linkage plate is provided with a movable cover, and the lower end of the movable cover is placed on the outside of the protective cover.

[0012] Preferably, a sealing cylinder is installed at the end of the guide rod away from the mounting base, and the upper end of the sealing cylinder is sleeved on the outside of the top spring and extends into the interior of the mounting base.

[0013] The present invention provides an automatic clamping device for the moving contact of an annealing furnace, which has the following advantages:

[0014] 1. In this utility model, when the guide rod is pushed downward under the action of the top spring, the guide rod drives the moving contact to move synchronously through the linkage plate. That is, the moving contact gradually approaches the stationary contact until the two are engaged, at which point the circuit is closed. During this process, the top spring applies a downward force through the guide rod, causing the guide rod to apply a force that pushes the moving contact closer to the stationary contact. Under the action of this force, the moving contact always automatically presses against the stationary contact. This means that vibrations generated during the operation of external equipment cannot easily separate the stationary contact from the moving contact, thus effectively ensuring the firmness of the contact engagement. At the same time, the movable cover further improves the sealing performance of the protective cover, thereby effectively preventing external debris from entering the protective cover and causing circuit problems.

[0015] 2. The locking component in this invention allows for the fixation of the push frame and guide rod when the power is off, even when the switch is open, thus preventing the guide rod from resetting and preventing the moving contact from moving to the stationary contact. The electric push rod allows for opening and closing the switch without manual operation, as the switch can be opened and closed directly through its output, thus protecting personnel safety. The partition plate separates the stationary contacts, reducing the risk of arcing between them. The heat dissipation holes reduce heat buildup at the contact points, ensuring normal operation of the device. The sealing cylinder protects the top spring, preventing foreign objects from entering and interfering with its movement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram from one perspective of an automatic pressing device for the moving contact of an annealing furnace proposed in this utility model.

[0017] Figure 2 This is another perspective schematic diagram of an automatic pressing device for the moving contact of an annealing furnace proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of an automatic pressing device for the moving contact of an annealing furnace proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the linkage plate and push frame of an automatic pressing device for moving contacts of an annealing furnace proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of a protective cover for an automatic pressing device for moving contacts of an annealing furnace proposed in this utility model;

[0021] Figure 6 This is a schematic diagram showing the coordination between the moving and stationary contacts of an automatic pressing device for moving contacts in an annealing furnace, as proposed in this utility model.

[0022] In the diagram: 1. Mounting plate; 2. Stationary contact; 3. Linkage plate; 4. Moving contact; 5. Protective cover; 6. Guide rod; 7. Mounting base; 8. Top spring; 9. Push frame; 10. Barrier rod; 11. Socket; 12. Electric push rod; 13. Power supply; 14. Divider plate; 15. Movable cover; 16. Sealing cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1

[0025] Reference Figure 1-6 An automatic pressing device for moving contacts of an annealing furnace includes a mounting plate 1. The mounting plate 1 has several stationary contacts 2 fixed in the middle of its front surface. A movable linkage plate 3 is provided on the upper part of the front surface of the mounting plate 1. Several cooperating moving contacts 4 are provided on the lower side of the linkage plate 3 corresponding to the stationary contacts 2. A protective cover 5 is provided on the front side of the mounting plate 1 corresponding to the stationary contacts 2. Guide rods 6 are fixed near the ends of both ends of the linkage plate 3. A mounting seat 7 is slidably sleeved on the rod body of the guide rod 6. The mounting seat 7 is fixed to the surface of the mounting plate 1. A top spring 8 is provided between the end of the guide rod 6 away from the mounting seat 7 and the mounting seat 7. A push frame 9 is installed at the end of the guide rod 6 away from the linkage plate 3. A locking assembly is provided between the push frame 9 and the mounting plate 1. Both the stationary contacts 2 and the moving contacts 4 are connected to external wiring.

[0026] Example 2

[0027] Reference Figure 1-6 While all other parts are the same as in Example 1, the difference between this example and Example 1 is that:

[0028] The locking assembly includes a blocking rod 10 and a socket 11. The socket 11 is located on the mounting plate 1 and close to the mounting base 7. The blocking rod 10 is attached to the side of the push frame 9, and its diameter is one-tenth the diameter of the socket 11. The locking assembly is designed to secure the push frame 9 and the guide rod 6 even when the circuit breaker is open, preventing the guide rod 6 from resetting and thus preventing the moving contact 4 from moving towards the stationary contact 2. An electric push rod 12 is provided on one side of the mounting plate 1, and the electric push rod 12 is connected to a wire. The output end of the power supply 13 and the electric actuator 12 is connected to one end of the linkage plate 3. The electric actuator 12 allows the gate to be opened and closed without manual operation, and the gate can be opened and closed through the output end of the electric actuator 12, thereby protecting the personal safety of personnel. The protective cover 5 is equipped with a partition plate 14, which is located between the two stationary contacts 2. The partition plate 14 provides a barrier between the stationary contacts 2, thereby reducing the phenomenon of arc contact and short circuit between the stationary contacts 2.

[0029] The protective cover 5 has several heat dissipation holes. Both the protective cover 5 and the partition plate 14 are coated with an insulating coating. The heat dissipation holes can reduce the heat accumulation at the contact point to a certain extent, thereby ensuring the normal operation of the device. The linkage plate 3 has a movable cover 15 on its outer side. The lower end of the movable cover 15 covers the outer side of the protective cover 5. The movable cover 15 further improves the sealing performance of the protective cover 5, thereby effectively preventing external debris from entering the protective cover 5 and causing circuit problems, such as preventing short circuits caused by cockroaches or rats. A sealing cylinder 16 is installed at the end of the guide rod 6 away from the mounting base 7. The upper end of the sealing cylinder 16 is sleeved on the outside of the top spring 8 and extends into the mounting base 7. The sealing cylinder 16 protects the top spring 8, thereby preventing debris from entering the top spring 8 and interfering with its movement.

[0030] Operating principle and advantages: In use, the stationary contact 2 and the moving contact 4 are connected to external conductors. When the moving contact 4 is engaged with the stationary contact 2, it is in the closed state, i.e., the circuit is open. When the moving contact 4 is disengaged from the stationary contact 2, it is in the open state, i.e., the circuit is broken. Furthermore, since the moving contact 4 is mounted on the linkage plate 3, and the linkage plate 3 is connected to the guide rod 6, when the guide rod 6 is pushed downwards under the action of the top spring 8, the guide rod 6 drives the moving contact 4 through the linkage plate 3. The moving contact 4 gradually moves closer to the stationary contact 2 until they are engaged, at which point the circuit is closed. During this process, the top spring 8 and the guide rod 6 apply a downward force, which in turn applies a force that pushes the moving contact 4 closer to the stationary contact 2. Under this force, the moving contact 4 automatically presses against the stationary contact 2, so that vibrations generated during the operation of external equipment cannot easily separate the stationary contact 2 from the moving contact 4, thus effectively ensuring the firmness of the contact engagement.

[0031] Furthermore, the locking component allows for the fixation of the push frame 9 and guide rod 6 when the power is off, even when the switch is open, thus preventing the guide rod 6 from resetting and preventing the moving contact 4 from moving towards the stationary contact 2. The electric push rod 12 allows for opening and closing the switch without manual operation, as it can be done directly through the output of the electric push rod 12, thereby protecting personnel safety. The partition plate 14 provides a barrier between the stationary contacts 2, reducing the possibility of arcing between them. The heat dissipation holes reduce heat accumulation at the contact points, ensuring normal operation of the device. The movable cover 15 further enhances the sealing of the protective cover 5, effectively preventing external debris from entering the protective cover 5 and causing circuit problems. The sealing cylinder 16 protects the top spring 8, preventing debris from entering and interfering with its movement.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic clamping device for the moving contact of an annealing furnace, comprising a mounting plate (1), characterized in that, The mounting plate (1) has several stationary contacts (2) fixed in the middle of its front surface. The upper part of the front surface of the mounting plate (1) is provided with a movable linkage plate (3). The lower side of the linkage plate (3) is provided with several cooperating moving contacts (4) corresponding to the stationary contacts (2). The front side of the mounting plate (1) is provided with a protective cover (5) corresponding to the stationary contacts (2). The near ends of both ends of the linkage plate (3) are fixed with guide rods (6). The rod body of the guide rod (6) is slidably fitted with a mounting seat (7). The mounting seat (7) is fixed on the surface of the mounting plate (1). The end of the guide rod (6) away from the mounting seat (7) and the mounting seat (7) are provided with a top spring (8). The end of the guide rod (6) away from the linkage plate (3) is provided with a push frame (9). The push frame (9) and the mounting plate (1) are provided with a locking assembly.

2. The automatic clamping device for the moving contact of an annealing furnace according to claim 1, characterized in that, The locking assembly includes a blocking bar (10) and a socket (11). The socket (11) is located on the plate of the mounting plate (1) and close to the mounting base (7). The blocking bar (10) is attached to the side of the push frame (9). The diameter of the blocking bar (10) is one-tenth of the diameter of the socket (11).

3. The automatic clamping device for the moving contact of an annealing furnace according to claim 1, characterized in that, An electric actuator (12) is provided on one side of the mounting plate (1). The electric actuator (12) is connected to a power source (13) via a wire. The output end of the electric actuator (12) is connected to the end of one end of the linkage plate (3).

4. The automatic clamping device for the moving contact of an annealing furnace according to claim 1, characterized in that, The protective cover (5) has a partition plate (14) inside, which is located between the two stationary contacts (2).

5. The automatic clamping device for the moving contact of an annealing furnace according to claim 4, characterized in that, The protective cover (5) has several heat dissipation holes, and both the protective cover (5) and the partition plate (14) are provided with an insulating coating.

6. The automatic clamping device for the moving contact of an annealing furnace according to claim 1, characterized in that, The outer side of the linkage plate (3) is provided with a movable cover (15), and the lower end of the movable cover (15) is covered on the outside of the protective cover (5).

7. The automatic clamping device for the moving contact of an annealing furnace according to claim 1, characterized in that, The guide rod (6) is equipped with a sealing cylinder (16) at the end away from the mounting base (7). The upper end of the sealing cylinder (16) is sleeved on the outside of the top spring (8) and extends into the interior of the mounting base (7).

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