Vacuum arc-extinguishing chamber contact rapid pull-open device

Abstract

The utility model discloses a vacuum arc-extinguishing chamber contact rapid pull-open device, which comprises a body, the body is provided with a movable screw, the movable screw is fixedly provided with a pressing plate, one side of the body is provided with a rotatable handle, the handle is provided with at least one tension spring, and the tension spring is provided with a movable screw. The other end of the tension spring is fixedly connected with the body, at least one eccentric block is arranged on one side of the handle, and the pressing plate is located on the moving track of the eccentric block. The handle is rotated to enable the tension spring to store energy gradually, and after the handle and the shaft pin are located on the same straight line, the handle is continuously pushed to release elastic force, so that the strength required for pulling the handle is saved, the speed of pushing the pressing plate to move by the eccentric block is increased, and the moving contact on the moving screw is enabled to be far away from the static contact quickly. And the product has the advantages of quick pulling, convenient operation, labor-saving operation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a device for quickly opening contacts of a vacuum interrupter. Background Art

[0002] The vacuum interrupter, also known as the vacuum switch tube, is the core component of medium and high voltage power switches. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off from the power supply through the excellent insulation of the vacuum inside the tube, thereby avoiding accidents and incidents.

[0003] Under normal conditions, the vacuum interrupter is in a closed state, that is, the moving and static contacts are in contact with each other. In order to separate the moving contact from the static contact, a nut is usually threaded onto the moving screw of the moving contact, and the nut abuts against the outer end face of the vacuum interrupter. The moving screw is moved by rotating the nut, thereby moving the moving contact away from the static contact. The above operation method has a slow disconnection speed. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology designs and to provide a product that can be opened quickly, is easy to operate and saves labor.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] A device for quickly pulling apart contacts of a vacuum interrupter comprises a main body, the main body being provided with a movable screw, the movable screw being fixed with a pressure plate, a rotatable handle being provided on one side of the main body, the handle being provided with at least one tension spring, the other end of the tension spring being connected and fixed to the main body, at least one eccentric block being provided on one side of the handle, and the pressure plate being located on the movable track of the eccentric block.

[0007] Preferably, the body is provided with a pole mounting seat, and one end surface of the pole mounting seat is provided with a plurality of support blocks evenly distributed with a circle as the axis, and the support blocks are provided with bent plates, and the bent plates are connected and fixed to each other.

[0008] Preferably, the bent plate is provided with a guide screw passing through the pressure plate, and the end of the guide screw is provided with a nut and abuts against the bent plate.

[0009] Preferably, the movable screw is threadedly connected to a nut and abuts against the end surface of the pressure plate.

[0010] Preferably, two of the support blocks are provided with axle pins, the handle is pivotally arranged on the axle pins, and the handle is provided with a connecting portion.

[0011] Preferably, one end of the tension spring is connected and fixed to the support block, and the other end of the tension spring is connected and fixed to the connecting portion.

[0012] Preferably, the pole mounting seat, support block and bent plate are made by integral casting.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model applies a pushing force to the handle, and as the handle gradually rotates and stretches the tension spring until the handle and the shaft pin are in the same straight line, the tension spring stores the most energy at this time, and the eccentric block is located above the pressure plate, and the handle is continued to be pushed to rotate, the tension spring releases the elastic force, and the handle is pulled to rotate rapidly, and the eccentric block quickly pushes the pressure plate down, so that the moving contact on the moving screw is away from the static contact. The above design greatly improves the separation speed of the moving and static contacts, saves the required pushing force, and the operation is simple and reduces the training cost, so that the product has the advantages of fast opening, convenient operation, and labor-saving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic side cross-sectional structural diagram of a vacuum interrupter contact quick opening device in a closed state according to the present invention;

[0017] Figure 2 For this utility model Figure 1 A partial enlarged diagram of a vacuum interrupter contact quick opening device;

[0018] Figure 3 This is a schematic side cross-sectional structural diagram of a vacuum interrupter contact quick opening device in a contact opening state according to the present invention;

[0019] Figure 4 For this utility model Figure 3 A partial enlarged diagram of a vacuum interrupter contact quick opening device B;

[0020] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0021] Figure numerals: 1. body; 2. pressure plate; 3. handle; 4. tension spring; 5. pole mounting seat; 6. guide screw; 7. nut; 8. shaft pin; 11. moving screw; 31. eccentric block; 32. connecting part; 51. support block; 52. bent plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0025] Reference example Figures 1 to 4 A vacuum interrupter contact rapid opening device includes a body 1, the body 1 is provided with a movable screw 11, the movable screw 11 is fixed with a pressure plate 2, a rotatable handle 3 is provided on one side of the body 1, the handle 3 is provided with at least one tension spring 4, the other end of the tension spring 4 is fixedly connected to the body 1, and at least one eccentric block 31 is provided on one side of the handle 3, and the pressure plate 2 is located on the movable track of the eccentric block 31;

[0026] It is worth mentioning that the body 1 is provided with a pole mounting seat 5. One end surface of the pole mounting seat 5 is evenly distributed with a number of support blocks 51 with the circular point as the axis. The support blocks 51 are provided with bent plates 52. The bent plates 52 are connected and fixed to each other. The pole mounting seat 5 facilitates the installation and fixation of the vacuum interrupter in the vacuum circuit breaker. The bent plates 52 provide support for the guide screws 6.

[0027] It is worth mentioning that the bent plate 52 is provided with a guide screw 6 and passes through the pressure plate 2. The end of the guide screw 6 is provided with a nut 7 and abuts the bent plate 52. The guide screw 6 is used to provide a guide for the pressure plate 2. By rotating the nut 7, the length of the guide screw 6 is adjusted, thereby changing the distance that the pressure plate 2 descends, which corresponds to the distance between the moving contact and the static contact.

[0028] It is worth mentioning that the movable screw 11 is threadedly connected to a nut 7 and abuts against the end surface of the pressure plate 2, and the nut 7 prevents the pressure plate 2 from separating from the movable screw 11;

[0029] It is worth mentioning that the two support blocks 51 are provided with an axis pin 8, the handle 3 is pivotally arranged on the axis pin 8, the handle 3 is provided with a connecting portion 32, and the axis enables the handle 3 to rotate around this axis, and the tension of the tension spring 4 is transmitted to the handle 3 through the connecting portion 32;

[0030] It is worth mentioning that one end of the tension spring 4 is connected and fixed to the support block 51, and the other side of the tension spring 4 is connected and fixed to the connecting portion 32. The tension direction of the tension spring 4 changes with the rotation direction of the handle 3.

[0031] It is worth mentioning that the pole mounting seat 5, the support block 51 and the bent plate 52 are configured to be made by integral casting, which reduces manufacturing time and cost.

[0032] The operating principle of the present invention is now described as follows:

[0033] The initial state is as follows Figure 2 As shown, a thrust is applied to the handle 3, causing the handle 3 to move toward the left side of the body 1. As the handle 3 rotates, the connecting portion 32 and the other end of the tension spring 4 gradually move away from each other, and the tension spring 4 is stretched to store energy until the handle 3 and the shaft pin 8 are in the same straight line. At this time, the tension spring 4 stores the most energy, and the eccentric weight 31 is located above the pressure plate 2.

[0034] Continue to push the handle 3 to rotate, the tension spring 4 releases the elastic force and quickly pulls the handle 3 to rotate, the eccentric block 31 pushes the pressure plate 2 down quickly, until the end face of the eccentric block 31 and the end face of the pressure plate 2 abut against each other, the elastic force of the tension spring 4 and the self-closing force of the body 1 offset each other, so that the pressure plate 2 is kept in the position after the activity. At this time, the opening distance of the moving and static contacts in the body 1 is as shown in the attached figure. Figure 4 shown.

[0035] The above design scheme can enable the product to achieve the advantages of quick opening, convenient operation and labor-saving operation.

[0036] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A vacuum interrupter contact quick opening device, comprising a body (1), wherein the body (1) is provided with a movable screw (11), and is characterized in that: The movable screw (11) is fixed with a pressure plate (2), a rotatable handle (3) is provided on one side of the body (1), the handle (3) is provided with at least one tension spring (4), the other end of the tension spring (4) is connected and fixed to the body (1), and at least one eccentric block (31) is provided on one side of the handle (3), and the pressure plate (2) is located on the movable track of the eccentric block (31).

2. The vacuum interrupter contact quick opening device according to claim 1, characterized in that: The body (1) is provided with a pole mounting seat (5), and one end surface of the pole mounting seat (5) is provided with a plurality of support blocks (51) evenly distributed with a circle as the axis. The support blocks (51) are provided with bent plates (52), and the bent plates (52) are connected and fixed to each other.

3. The vacuum interrupter contact quick opening device according to claim 2, characterized in that: The bent plate (52) is provided with a guide screw (6) and passes through the pressure plate (2); the end of the guide screw (6) is provided with a nut (7) and abuts against the bent plate (52).

4. The vacuum interrupter contact quick opening device according to claim 3, characterized in that: The movable screw (11) is threadedly connected to a nut (7) and abuts against the end surface of the pressing plate (2).

5. The vacuum interrupter contact quick opening device according to claim 3, characterized in that: Two of the support blocks (51) are provided with axle pins (8), the handle (3) is pivotally arranged on the axle pins (8), and the handle (3) is provided with a connecting portion (32).

6. The vacuum interrupter contact quick opening device according to claim 5, characterized in that: One end of the tension spring (4) is connected and fixed to the support block (51), and the other side of the tension spring (4) is connected and fixed to the connecting portion (32).

7. The vacuum interrupter contact quick opening device according to claim 4 or 6, characterized in that: The pole mounting seat (5), the support block (51), and the bent plate (52) are configured to be integrally cast.

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