Device for adjusting positions of moving and static contacts of isolation switch

Abstract

The invention relates to the technical field of disconnecting link gear adjustment, in particular to an isolation disconnecting link moving and static contact position adjusting device, which comprises a disconnecting link unit, and is characterized in that the disconnecting link unit comprises a shell and a plurality of static contacts arranged in the shell; and the switch unit comprises a driving rod which is rotatably arranged in the shell and an electrifying assembly which is arranged at the end part of the driving rod and is matched with the static contact. According to the position adjusting device for the moving and static contacts of the isolation switch, when the electrifying assembly is controlled to be in contact with the static contact through the driving rod, the baffle in the electrifying assembly can be in contact with the static contact after the moving contact and the static contact are in contact, continuous rotation of the driving rod is blocked, and the problem of excessive gear selection is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of knife switch gear position adjustment, in particular to a device for adjusting the position of moving and static contacts of an isolating knife switch. Background Art

[0002] The knife switch is a high-voltage electrical device that disconnects or connects the circuit in the switch operation of the high-voltage transmission line. Its main function is to ensure the reliability and safety of power transmission. In the use of the knife switch, the correctness of the gear selection is particularly important. The wrong gear selection may cause serious safety problems.

[0003] At present, there are multiple gears in the knife switch, such as the disconnect gear, the closing gear and the ground gear, and the gear selection is usually achieved by the operator through manual operation. However, due to the operator's mistakes or working environment factors, it is often the case that the gear selection is in place but the operation continues, resulting in the problem of over-positioning of the gear, which in turn causes a series of unsafe factors and may cause serious harm and loss to personnel and equipment. For this reason, the present invention provides a device for adjusting the position of the moving and static contacts of the isolation knife switch. Summary of the invention

[0004] In view of the problem of over-selection of gear position in the above-mentioned existing knife switch gear selection, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a device for adjusting the position of the moving and static contacts of an isolating knife switch, the object of which is to ensure that the knife switch gear will not be over-selected when the gear is selected.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A device for adjusting the position of moving and static contacts of an isolating knife switch, comprising a knife switch unit, wherein the knife switch unit comprises a housing, and a plurality of static contacts arranged inside the housing;

[0007] A switch unit comprises a driving rod rotatably arranged in the housing, and a power-on component arranged at the end of the driving rod and matched with the static contact.

[0008] As a preferred solution of the device for adjusting the position of movable and static contacts of the isolating knife switch described in the present invention, the power-on component includes a movable contact arranged at the end of the driving rod, a push rod arranged at the end of the driving rod, a limiting portion arranged on the push rod, and a driving portion arranged on the limiting portion.

[0009] As a preferred solution of the device for adjusting the position of the movable and static contacts of the isolating knife switch of the present invention, the limiting part comprises a moving sleeve elastically arranged on the push rod, and baffles arranged on both sides of the moving sleeve;

[0010] The driving part is connected with the moving sleeve.

[0011] As a preferred solution of the device for adjusting the position of movable and static contacts of the isolating knife switch described in the present invention, the driving part includes a first sliding groove arranged in the driving rod and the push rod, a first connecting rope arranged in the first sliding groove and connected to the movable sleeve, and a pull ring arranged at the end of the driving rod and connected to the first connecting rope.

[0012] As a preferred solution of the device for adjusting the position of the movable and static contacts of the isolating knife switch of the present invention, wherein: the movable contact is rotatably arranged at the end of the driving rod, and a mounting groove is arranged in the movable contact;

[0013] The push rod is rotatably inserted into the mounting groove, and the push rod is connected to the moving contact through a first spring;

[0014] The movable sleeve is provided with a second sliding groove, and the first spring passes through the second sliding groove and is connected with the push rod.

[0015] As a preferred solution of the isolating knife switch movable and static contact position adjustment device of the present invention, the driving part includes an extrusion block elastically arranged in the mounting groove and sliding through the movable contact, a driving member arranged in the mounting groove and connected to the extrusion block, and a push block arranged on the movable sleeve and cooperating with the driving member;

[0016] The extrusion block is butted against the static contact, and the contact surface is an inclined surface.

[0017] As a preferred solution of the device for adjusting the position of the moving and static contacts of the isolating knife switch of the present invention, the driving member comprises a slider slidably arranged in the inner wall of the installation groove, a plurality of guide rings arranged on the inner wall of the installation groove, and a second connecting rope arranged at the bottom of the extrusion block and passing through the plurality of guide rings and connected to the slider;

[0018] A third sliding groove for the sliding block to slide is arranged on the inner wall of the installation groove, and the sliding block is connected to the third sliding groove via a third spring.

[0019] As a preferred solution of the isolating knife switch moving and static contact position adjustment device of the present invention, the driving rod includes a rod body connected to the push rod, and a rotating disk arranged at the end of the rod body and located outside the shell.

[0020] As a preferred solution of the device for adjusting the position of movable and static contacts of the isolating knife switch of the present invention, the shell is further provided with an arc extinguishing chamber shielding cover and a support column arranged between the arc extinguishing chamber shielding cover and the shell.

[0021] As a preferred solution of the device for adjusting the position of the moving and static contacts of the isolating knife switch of the present invention, an observation window is further provided on the housing.

[0022] The beneficial effect of the present invention is that when the power-on component is controlled to contact with the static contact by the driving rod, the baffle in the power-on component can contact with the static contact after the moving contact and the static contact are completely in contact, thereby blocking the continued rotation of the driving rod and avoiding the problem of over-selection of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the device for adjusting the position of the moving and static contacts of the isolating knife switch of the present invention.

[0025] Figure 2 The figure is a schematic diagram of the structure of the energized components of the device for adjusting the position of the moving and static contacts of the isolating knife switch according to the first embodiment of the present invention.

[0026] Figure 3 The figure is a schematic diagram of the structure of the energized components of the device for adjusting the position of the moving and static contacts of the isolating knife switch according to the second embodiment of the present invention.

[0027] Figure 4 The figure is a schematic diagram of the structure of the driving component of the device for adjusting the position of the moving and static contacts of the isolating knife switch according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Example 1, reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a device for adjusting the position of moving and static contacts of an isolating knife switch, the device includes a knife switch unit 100 and a switch unit 200, and the gear position of the knife switch is selected by rotating the switch unit 200.

[0033] The knife switch unit 100 includes a housing 101 and a plurality of stationary contacts 102 disposed inside the housing 101 ; each stationary contact 102 represents a gear position.

[0034] The switch unit 200 includes a driving rod 201 rotatably disposed in the housing 101, and a power-on component 202 disposed at the end of the driving rod 201 and cooperating with the static contact 102. The gear selection is achieved by connecting the power-on component 202 with the static contact 102 corresponding to the gear.

[0035] Among them, the power-on component 202 includes a moving contact 202a arranged at the end of the driving rod 201, a push rod 202b arranged at the end of the driving rod 201, a limiting portion 202c arranged on the push rod 202b, and a driving portion 202d arranged on the limiting portion 202c; when the moving contact 202a contacts the static contact 102, power can be turned on to complete the gear selection.

[0036] Furthermore, the limiting portion 202c includes a movable sleeve 202c-1 elastically arranged on the push rod 202b, and baffles 202c-2 arranged on both sides of the movable sleeve 202c-1; the driving portion 202d is connected to the movable sleeve 202c-1; wherein an angle exists between the push rod 202b and the moving contact 202a, and when the moving contact 202a is moved and inserted into the static contact 102, the push rod 202b drives the baffle 202c-2 to move to the side of the static contact 102 and contact the static contact 102.

[0037] Furthermore, the driving part 202d includes a first slide groove 202d-1 arranged in the driving rod 201 and the push rod 202b, a first connecting rope 202d-2 arranged in the first slide groove 202d-1 and connected to the movable sleeve 202c-1, and a pull ring 202d-3 arranged at the end of the driving rod 201 and connected to the first connecting rope 202d-2, wherein the top of the push rod 202b is connected to the movable sleeve 202c-1 by a metal spring or a spring, and when the pull ring 202d-3 is pulled, the first connecting rope 202d-2 will be pulled, thereby pulling the movable sleeve 202c-1, so that the movable sleeve 202c-1 drives the baffle 202c-2 to slide.

[0038] In the initial state, the movable sleeve 202c-1 pops out, and the baffle 202c-2 will abut against the static contact 102 as the driving rod 201 rotates, thereby blocking the rotation of the driving rod 201; and when the pull ring 202d-3 is pulled, the movable sleeve 202c-1 is driven to move downward. At this time, when the driving rod 201 rotates, the baffle 202c-2 does not contact the static contact 102, so that the driving rod 201 can pass smoothly when passing through the static contact 102.

[0039] During use, when selecting a gear, it is necessary to first pull the pull ring 202d-3 to move the baffle 202c-2 down, and then rotate the drive rod 201 to drive the baffle 202c-2 and the moving contact 202a to leave the static contact 102, and release the pull ring 202d-3 before reaching the required gear static contact 102. When the moving contact 202a contacts the required gear static contact 102, the baffle 202c-2 blocks its continued rotation to ensure that the moving contact 202a contacts the static contact 102, and will not be misaligned due to excessive force, thereby affecting the electrical conductivity.

[0040] Example 2, reference Figure 3 and Figure 4 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: the moving contact 202a is rotatably arranged at the end of the driving rod 201, and a mounting groove 202a-1 is provided in the moving contact 202a; the push rod 202b is rotatably inserted in the mounting groove 202a-1, and the push rod 202b is connected to the moving contact 202a through a first spring 202a-2; the friction force between the moving contact 202a and the stationary contact 102 is greater than the elastic force of the first spring 202a-2;

[0041] When the driving rod 201 is rotated to drive the push rod 202b and the moving contact 202a to rotate, when the moving contact 202a contacts the stationary contact 102, the push rod 202b will compress the first spring 202a-2. When the first spring 202a-2 is compressed to the end of the stroke, the moving contact 202a will be inserted into the stationary contact 102 to achieve gear selection;

[0042] The movable sleeve 202c-1 is provided with a second slide groove 202c-3, and the first spring 202a-2 passes through the second slide groove 202c-3 and is connected to the push rod 202b. When the movable sleeve 202c-1 slides up and down, it will not interfere with the first spring 202a-2.

[0043] Further, the driving part 202d includes an extrusion block 202d-4 elastically arranged in the mounting groove 202a-1 and sliding through the moving contact 202a, a driving member 202d-5 arranged in the mounting groove 202a-1 and connected to the extrusion block 202d-4, and a push block 202d-6 arranged on the moving sleeve 202c-1 and matched with the driving member 202d-5; wherein the extrusion block 202d-4 is connected to the inner wall of the mounting groove 202a-1 by a spring or a metal spring sheet;

[0044] The extrusion block 202d-4 is abutted against the static contact 102, and the contact surface is an inclined surface. When the moving contact 202a contacts the static contact 102, the extrusion block 202d-4 is synchronously abutted against the static contact 102. As the moving contact 202a is inserted into the static contact 102, the extrusion block 202d-4 is compressed by the static contact 102 and inserted into the installation groove 202a-1. When the extrusion block 202d-4 moves, it will drive the driving member 202d-5 to move.

[0045] The driving member 202d-5 includes a slider 202d-51 slidably disposed in the inner wall of the mounting groove 202a-1, a plurality of guide rings 202d-52 disposed on the inner wall of the mounting groove 202a-1, and a second connecting rope 202d-53 disposed at the bottom of the extrusion block 202d-4 and passing through the plurality of guide rings 202d-52 and connected to the slider 202d-51;

[0046] A third sliding groove 202d-54 for the sliding block 202d-51 to slide is provided on the inner wall of the installation groove 202a-1, and the sliding block 202d-51 is connected to the third sliding groove 202d-54 via a third spring 202d-55;

[0047] In the initial state, the slider 202d-51 moves away from the extrusion block 202d-4 under the elastic force of the third spring 202d-55; when the extrusion block 202d-4 moves toward the inside of the installation groove 202a-1, it will pull the second connecting rope 202d-53 and pull the slider 202d-51 toward the extrusion block 202d-4.

[0048] In the initial state, the baffle 202c-2 is located on the inner side of the plurality of stationary contacts 102. When the moving contact 202a contacts the stationary contact 102, the push rod 202b compresses the first spring 202a-2 until the push rod 202b abuts against the slider 202d-51, thereby preventing the first spring 202a-2 from being squeezed to the end of the stroke, and protecting the first spring 202a-2 from being squeezed and damaged.

[0049] During operation, when the driving rod 201 rotates, the moving contact 202a is driven to contact the static contact 102. At this time, the push rod 202b compresses the first spring 202a-2 and the slider 202d-51, and the pressure block moves to the top of the slider 202d-51. As the driving rod 201 continues to rotate, the extrusion block 202d-4 contacts the static contact 102 and moves toward the inside of the installation groove 202a-1. At the same time, the second connecting rope 202d-53 is pulled to pull the slider 202d-51 toward the extrusion block 202d-4, and the slider 202 d-51 will contact the pressure block, driving the pressure block and the movable sleeve 202c-1 to move, so that the baffle 202c-2 moves to the side of the static contact 102. Then, when the extrusion block 202d-4 retracts into the installation groove 202a-1 and the moving contact 202a is completely fitted with the static contact 102, the baffle 202c-2 abuts against the side of the static contact 102 to prevent it from rotating, completing the gear selection. Then, the drive rod 201 is released, and the first spring 202a-2 rebounds to make the drive rod 201 rotate in the opposite direction, and the baffle 202c-2 is separated from the static contact 102.

[0050] When selecting the gear again, it is only necessary to rotate the driving rod 201 so that the push rod 202b compresses the first spring 202a-2. Since the extrusion block 202d-4 is retracted in the mounting groove 202a-1, the slider 202d-51 is in a pulled state. At this time, the pushed block 202d-6 will resist the slider 202d-51, and the baffle 202c-2 is located on the inner side of the static contact 102, which can squeeze the moving contact 202a to separate it from the static contact 102. After the moving contact 202a is separated from the static contact 102, the first spring 202a-2 returns to its initial state until it reaches the next static contact 102, completing the connection between the moving contact 202a and the static contact 102.

[0051] Each time after the moving contact 202a completes a connection with the stationary contact 102, the driving rod 201 cannot rotate, which can avoid excessive rotation resulting in unsuccessful connection. At the same time, the contact status of the moving contact 202a and the stationary contact 102 can be known by observing the working status of the driving rod 201.

[0052] The remaining structures are the same as those of Example 1.

[0053] Example 3, reference Figure 1 and Figure 3 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the driving rod 201 includes a rod body 201a connected to the push rod 202b, and a turntable 201b arranged at the end of the rod body 201a and located outside the shell 101; the turntable 201b can increase the torque of the rod body 201a to achieve a labor-saving effect.

[0054] Furthermore, the shell 101 is also provided with an arc extinguishing chamber shielding cover 103 and a support column 104 arranged between the arc extinguishing chamber shielding cover 103 and the shell 101 to eliminate the arc between the moving contact 202a and the static contact 102, thereby increasing safety.

[0055] Furthermore, the housing 101 is provided with an observation window 105 for conveniently observing the inside of the housing 101 and the states of the moving contact 202 a and the stationary contact 102 .

[0056] The remaining structure is the same as that of Example 2.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for adjusting the position of moving and static contacts of an isolating knife switch, characterized in that: include, A knife switch unit (100), the knife switch unit (100) comprising a housing (101) and a plurality of stationary contacts (102) arranged inside the housing (101); A switch unit (200) comprises a driving rod (201) rotatably disposed in the housing (101), and a power supply component (202) disposed at the end of the driving rod (201) and cooperating with the stationary contact (102).

2. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 1 is characterized in that: The power supply component (202) comprises a moving contact (202a) arranged at the end of the driving rod (201), a push rod (202b) arranged at the end of the driving rod (201), a limiting portion (202c) arranged on the push rod (202b), and a driving portion (202d) arranged on the limiting portion (202c).

3. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 2 is characterized in that: The limiting portion (202c) comprises a movable sleeve (202c-1) elastically arranged on the push rod (202b), and baffles (202c-2) arranged on both sides of the movable sleeve (202c-1); The driving part (202d) is connected to the moving sleeve (202c-1).

4. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 3 is characterized in that: The driving part (202d) comprises a first sliding groove (202d-1) arranged in the driving rod (201) and the pushing rod (202b), a first connecting rope (202d-2) arranged in the first sliding groove (202d-1) and connected to the moving sleeve (202c-1), and a pull ring (202d-3) arranged at the end of the driving rod (201) and connected to the first connecting rope (202d-2).

5. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 3 is characterized in that: The moving contact (202a) is rotatably arranged at the end of the driving rod (201), and a mounting groove (202a-1) is provided in the moving contact (202a); The push rod (202b) is rotatably inserted into the installation groove (202a-1), and the push rod (202b) is connected to the moving contact (202a) via a first spring (202a-2); The movable sleeve (202c-1) is provided with a second sliding groove (202c-3), and the first spring (202a-2) passes through the second sliding groove (202c-3) and is connected to the push rod (202b).

6. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 5 is characterized in that: The driving part (202d) comprises an extrusion block (202d-4) elastically arranged in the installation groove (202a-1) and sliding through the moving contact (202a), a driving member (202d-5) arranged in the installation groove (202a-1) and connected to the extrusion block (202d-4), and a push block (202d-6) arranged on the moving sleeve (202c-1) and cooperating with the driving member (202d-5); The extrusion block (202d-4) is in abutment with the static contact (102), and the contact surface is an inclined surface.

7. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 6 is characterized in that: The driving member (202d-5) comprises a sliding block (202d-51) slidably arranged in the inner wall of the installation groove (202a-1), a plurality of guide rings (202d-52) arranged on the inner wall of the installation groove (202a-1), and a second connecting rope (202d-53) arranged at the bottom of the extrusion block (202d-4) and passing through the plurality of guide rings (202d-52) and connected to the sliding block (202d-51); A third sliding groove (202d-54) for the sliding block (202d-51) to slide is provided on the inner wall of the installation groove (202a-1), and the sliding block (202d-51) and the third sliding groove (202d-54) are connected via a third spring (202d-55).

8. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to any one of claims 5 to 7, characterized in that: The driving rod (201) comprises a rod body (201a) connected to the push rod (202b), and a rotating disk (201b) arranged at the end of the rod body (201a) and located outside the housing (101).

9. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to any one of claims 1 to 7, characterized in that: The housing (101) is also provided with an arc extinguishing chamber shielding cover (103) and a support column (104) arranged between the arc extinguishing chamber shielding cover (103) and the housing (101).

10. The device for adjusting the position of the moving and static contacts of the isolating knife switch according to claim 9 is characterized in that: The housing (101) is also provided with an observation window (105).

Images