Adjustable fastening device and isolating switch with adjustable fastening device

Abstract

The present invention proposes an adjustable fastening device, including a rod body for connecting contacts on both sides of a switch device, the bottom end of the rod body is fixed to one side of the switch device, and also includes an eccentric body, a pressure plate and an operating handle. The pressure plate includes a first pressure plate and a second pressure plate, the upper end of the first pressure plate is hinged to the first eccentric point of the eccentric body, the upper end of the second pressure plate is hinged to the second eccentric point of the eccentric body, the lower end of the first pressure plate and the lower end of the second pressure plate are both fixedly connected to the top of the rod body, the eccentric body is installed in the gap between the first pressure plate and the second pressure plate, and the operating handle is fixedly connected to the circumference of the eccentric body. The present invention also proposes an isolating switch with an adjustable fastening device, which avoids the phenomenon that contacts are loose and cannot be adjusted in time, improves the situation where equipment heat is caused by loose contacts, which further causes distribution network failure, and improves the reliability of distribution network operation.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission and distribution switch equipment, and more specifically, to an adjustable fastening device and a disconnector with the adjustable fastening device. Background Art

[0002] As the construction of distribution networks gradually increases, a failure in any link of the distribution network may have a significant impact on personal safety, power grid safety, and economic operation.

[0003] As an important component connecting lines and equipment in overhead power distribution lines, isolating switches must not only withstand normal operating voltage and current during operation, but also withstand the effects of fault current in case of failure. Since isolating switches installed outdoors have a harsh operating environment, the clamping force of the fastening screws of the moving and static contacts of the isolating switches becomes smaller after long-term operation, and the spring loses its elasticity and becomes loose, causing the contacts of the isolating switches to become loose. Statistics show that 90% of the heating of electrical equipment is due to poor contact. It is inevitable that the loose contacts of the isolating switches will cause heating, and the increase in failures caused by heating will further affect the reliability of power supply. In the actual operation of the isolating switches, if the staff finds heating during temperature measurement, they will temporarily take measures to tighten the moving and static contacts, or use a heating quick repair clamp to tighten the isolating switches, but it is an external disassembly repair clamp, which cannot be adjusted according to the actual looseness of the contacts, and cannot fundamentally solve the problem of loose contacts.

[0004] In summary, it is necessary to propose an adjustable fastening device and a disconnector with the adjustable fastening device. Summary of the invention

[0005] In order to overcome the phenomenon that switching equipment generates heat due to loose contacts, and the defect that the existing heating repair clamp cannot be adjusted according to the actual looseness of the contacts, the present invention proposes an adjustable fastening device and an isolating switch with an adjustable fastening device, which improves the situation where switching equipment fails due to heating and improves the reliability of distribution network operation.

[0006] The present invention aims to solve the above technical problems at least to a certain extent.

[0007] In order to achieve the above technical effects, the technical solution of the present invention is as follows:

[0008] An adjustable fastening device includes a rod body for connecting contacts on both sides of a switch device, the bottom end of the rod body is fixed to one side of the switch device, and also includes an eccentric body, a pressure plate and an operating handle. The pressure plate includes a first pressure plate and a second pressure plate. The upper end of the first pressure plate is hinged to the first eccentric point of the eccentric body, and the upper end of the second pressure plate is hinged to the second eccentric point of the eccentric body. The lower end of the first pressure plate and the lower end of the second pressure plate are both fixedly connected to the top of the rod body. The eccentric body is installed in the gap between the first pressure plate and the second pressure plate. The operating handle is fixedly connected to the circumference of the eccentric body. When the staff rotates the operating handle, the eccentric body is driven to rotate in the gap, and the edge of the eccentric body squeezes the contacts of the switch device.

[0009] Preferably, the operating handle is an operating rod or an operating ring, one end of the operating rod is fixedly connected to the circumference of the eccentric body, and the operating rod is provided with anti-slip grooves.

[0010] Preferably, the edge end of the operating ring is fixedly connected to the circumference of the eccentric body, and the inner diameter of the operating ring matches the diameter of the external insulating operating rod.

[0011] Here, the operating rod is provided with anti-slip grooves, which increases the contact friction force when the staff operates, ensures the safety of the staff's operation, and is conducive to the staff's adjustment of the tightness of the switchgear contacts when using the adjustable fastening device. As a preferred solution, the inner diameter of the operating ring matches the diameter of the external insulating operating rod. When the staff finds that the temperature rise is too high and needs to urgently adjust the tightness of the switchgear contacts, the external insulating operating rod is matched with the operating ring, and the operating ring is rotated by the insulating operating rod to drive the eccentric body to rotate. The circumference of the eccentric body squeezes the switchgear contacts to achieve live operation, avoiding the trouble of power outage when the traditional repair clamp is used to adjust the tightness of the contacts.

[0012] Preferably, the rod body is provided with threads, and the bottom end of the rod body is fixed to one side of the switch device by a first nut.

[0013] Here, the rod body is provided with threads, and the threads cooperate with nuts, indicating that the adjustable fastening device proposed in the present application can be used instead of conventional bolts for connecting contacts on the switch device.

[0014] Preferably, the adjustable fastening device further comprises a fastening body, and the fastening body is arranged between the top end of the rod body and the eccentric body.

[0015] Here, a fastening body is arranged between the top of the rod body and the eccentric body, which can increase the contact area between the eccentric body and the switch device when squeezing the switch device contact, so that when the eccentric body rotates to squeeze the switch device, the pressure is applied more evenly, thereby improving the adjustment effect of the tightness of the contact.

[0016] Preferably, the fastening body is in the shape of a hollow cylinder with a bottom surface, and a first strip hole and a second strip hole are provided on the bottom surface, and the first strip hole and the second strip hole are symmetrically distributed along the diameter of the bottom surface, and the lower end of the first pressure plate is movably penetrated into the inner cavity of the fastening body through the first strip hole, and the lower end of the second pressure plate is movably penetrated into the inner cavity of the fastening body through the second strip hole. When the adjustable fastening device is used to fasten the contacts of the switching device, the staff rotates the operating handle to drive the eccentric body to rotate, and the edge of the eccentric body squeezes the bottom surface of the fastening body, and the bottom end of the fastening body squeezes the contacts of the switching device.

[0017] Here, the fastening body and the first pressure plate and the second pressure plate can move relative to each other, and the distance margin of the up and down movement of the fastening body matches the length difference between the maximum eccentric radius and the minimum eccentric radius of the eccentric body. When the staff turns the operating handle to drive the eccentric body to rotate, the edge of the eccentric body squeezes the bottom surface of the fastening body, and the bottom end of the fastening body squeezes the contacts of the switching device. Due to the interaction between the extrusion force applied by the eccentric body to the bottom surface of the fastening body and the reaction force of the switching device exerted by the bottom end of the fastening body on the switching device, once the tightness of the contacts of the switching device is adjusted, the eccentric body will not move, thereby ensuring the stability of the adjustable fastening device proposed in the present application when used for contact tightness adjustment.

[0018] Preferably, a second nut is fixed to the top end of the rod body, the second nut supports the bottom surface of the fastening body, and the eccentric body is in a round cake shape.

[0019] Here, when the staff rotates the operating handle, the eccentric body is driven to rotate around the eccentric point. As the rotation radius of the eccentric body is different, the degree of compression of the edge of the eccentric body on the bottom surface of the fastener is different.

[0020] The present invention also proposes an isolating switch with an adjustable fastening device, comprising an isolating switch body, a first adjustable fastening device and a second adjustable fastening device, wherein a moving contact is provided on one side of the isolating switch body and a stationary contact is provided on the other side, the first adjustable fastening device is connected to the moving contact, and the second adjustable fastening device is connected to the stationary contact, and the first adjustable fastening device and the second adjustable fastening device have the same structure.

[0021] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0022] The present invention provides an adjustable fastening device and an isolating switch with the adjustable fastening device. When a staff member finds that a switch device generates heat due to loose contacts, the staff member can rotate the operating handle to drive the eccentric body to rotate, and the edge of the eccentric body squeezes the contacts of the switch device, thereby achieving contact compression. Moreover, since an eccentric body is adopted, as the eccentric body rotates, the eccentric radius is different, and the degree of contact compression of the switch device is different. Therefore, the staff member can adjust the degree of contact compression of the eccentric body according to the actual looseness of the contacts. In addition, the isolating switch with the adjustable fastening device replaces the conventional bolts connecting the moving and static contacts with the adjustable fastening device, thereby avoiding the phenomenon that the contacts cannot be adjusted in time due to loose contacts, improving the situation that the equipment generates heat due to loose contacts, which further leads to distribution network failure, and improving the reliability of distribution network operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the adjustable fastening device proposed by the present invention.

[0024] Figure 2 It is a schematic structural diagram of an adjustable fastening device in which the operating handle is an operating ring according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the isolating switch with an adjustable fastening device proposed by the present invention.

[0025] Wherein: 1. rod body; 11. thread; 2. first nut; 3. switch device; 4. eccentric body; 41. first eccentric point; 42. second eccentric point; 5. pressure plate; 51. first pressure plate; 52. second pressure plate; 6. operating handle; 61. operating rod; 62. operating ring; 611. anti-slip pattern; 7. insulating operating rod; 8. fastener; 81. bottom surface; 811. first strip hole; 812. second strip hole; 9. second nut; 10. isolating switch body; 101. moving contact; 102. stationary contact; 12. first adjustable fastening device; 13. second adjustable fastening device. DETAILED DESCRIPTION

[0026] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0027] In order to better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0028] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] like Figure 1The structural schematic diagram of the adjustable fastening device shown in the figure includes a rod body 1 for connecting contacts on both sides of the switch device 3, the bottom end of the rod body 1 is fixed to one side of the switch device 3, and also includes an eccentric body 4, a pressure plate 5 and an operating handle 6. The pressure plate 5 includes a first pressure plate 51 and a second pressure plate 52. The upper end of the first pressure plate 51 is hinged to the first eccentric point 41 of the eccentric body 4, and the upper end of the second pressure plate 52 is hinged to the second eccentric point 42 of the eccentric body 4. The lower end of the first pressure plate 51 and the lower end of the second pressure plate 52 are both fixedly connected to the top of the rod body 1. The eccentric body 4 is installed in the gap 53 between the first pressure plate 51 and the second pressure plate 52. The operating handle 6 is fixedly connected to the circumference of the eccentric body 4. In specific applications, when the staff rotates the operating handle 6, the eccentric body 4 is driven to rotate in the gap 53. The eccentric body 4 is in a round cake shape, and the edge of the eccentric body 4 squeezes the contacts of the switch device, thereby tightening the loose contacts.

[0031] The operating handle 6 is an operating rod 61 or an operating ring 62, see Figure 1 In a specific implementation, when the operating handle 6 adopts an operating rod 61, one end of the operating rod 61 is fixedly connected to the circumference of the eccentric body 4, and an anti-slip pattern 611 is provided on the operating rod 61, which increases the contact friction force during operation of the staff and ensures the operating safety of the staff.

[0032] like Figure 2 As shown, when the operating handle 6 adopts an operating ring 62, the edge end of the operating ring 62 is fixedly connected to the circumference of the eccentric body 4, and the inner diameter of the operating ring 62 matches the diameter of the external insulating operating rod 7. When the staff finds that the temperature rise is too high and needs to urgently adjust the contact tightness of the switch device 3, the external insulating operating rod 7 is used to match the operating ring 62, and the operating ring 62 is rotated by the insulating operating rod 7 to drive the eccentric body 4 to rotate. The circumference of the eccentric body 4 squeezes the contact of the switch device 3 to achieve live operation, avoiding the trouble of power outage when the traditional repair clamp is used to adjust the contact tightness. In addition, the rod body 1 is provided with a thread 11, and the bottom end of the rod body 1 is fixed to one side of the switch device 3 by the first nut 2, indicating that the adjustable fastening device can replace the conventional bolts for connecting the contacts on the switch device.

[0033] See also Figure 2 The adjustable fastening device also includes a fastening body 8, which is arranged between the top of the rod body 1 and the eccentric body 4. The fastening body 8 is arranged between the top of the rod body 1 and the eccentric body 4 to increase the contact area between the eccentric body 4 and the switch device 3 when squeezing the switch device contact, so that when the eccentric body 4 rotates to squeeze the switch device 3, the pressure is applied more evenly, thereby improving the adjustment effect of the tightness of the contact. Figure 2As shown, the fastening body 8 is in the shape of a hollow cylinder with a bottom surface 81, and a first strip hole 811 and a second strip hole 812 are provided on the bottom surface 81, and the first strip hole 811 and the second strip hole 812 are symmetrically distributed along the diameter of the bottom surface 81, and the lower end of the first pressing plate 51 is movably penetrated into the inner cavity of the fastening body 81 through the first strip hole 811, and the lower end of the second pressing plate 52 is movably penetrated into the inner cavity of the fastening body 81 through the second strip hole 812. When the adjustable fastening device is used to fasten the contacts of the switch device 3, the staff rotates the operating handle 6 to drive the eccentric body 4 to rotate, and the edge of the eccentric body 4 squeezes the bottom surface 81 of the fastening body 8, and the bottom end of the fastening body 8 squeezes the contacts of the switch device, and as the rotation radius of the eccentric body 4 is different, the degree of squeezing of the bottom surface 81 of the fastening body 8 by the edge of the eccentric body 4 is different; a second nut 9 is fixed to the top of the rod body 1, and the second nut 9 supports the bottom surface 81 of the fastening body 8.

[0034] like Figure 3 As shown, the present invention also proposes an isolating switch with an adjustable fastening device, including an isolating switch body 10, a first adjustable fastening device 12 and a second adjustable fastening device 13. The first adjustable fastening device 12 has the same structure as the second adjustable fastening device 13. A moving contact 101 is provided on one side of the isolating switch body 10, and a static contact 102 is provided on the other side. In a specific implementation, the first adjustable fastening device 12 is connected to the moving contact 101, and the second adjustable fastening device 13 is connected to the static contact 102, which replaces the conventional bolt connection between the moving and static contacts.

[0035] The same or similar reference numerals correspond to the same or similar components;

[0036] The positional relationships described in the drawings are only for illustrative purposes and should not be construed as limiting the present patent.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An adjustable fastening device, comprising a rod body (1) for connecting contacts on both sides of a switch device (3), wherein the bottom end of the rod body (1) is fixed to one side of the switch device (3), characterized in that: It also includes an eccentric body (4), a pressure plate (5) and an operating handle (6), wherein the pressure plate (5) includes a first pressure plate (51) and a second pressure plate (52), the upper end of the first pressure plate (51) is hinged to the first eccentric point (41) of the eccentric body (4), the upper end of the second pressure plate (52) is hinged to the second eccentric point (42) of the eccentric body (4), the lower end of the first pressure plate (51) and the lower end of the second pressure plate (52) are both fixedly connected to the top of the rod body (1), the eccentric body (4) is installed in the gap (53) between the first pressure plate (51) and the second pressure plate (52), and the operating handle (6) is fixedly connected to the circumference of the eccentric body (4), when the staff rotates the operating handle (6), the eccentric body (4) is driven to rotate in the gap (53), and the edge of the eccentric body (4) squeezes the contact of the switch device (3); The adjustable fastening device further comprises a fastening body (8), wherein the fastening body (8) is arranged between the top end of the rod body (1) and the eccentric body (4); The fastening body (8) is in the shape of a hollow cylinder with a bottom surface (81), and a first strip hole (811) and a second strip hole (812) are provided on the bottom surface (81), and the first strip hole (811) and the second strip hole (812) are symmetrically distributed along the diameter of the bottom surface (81), and the lower end of the first pressing plate (51) is movably inserted into the inner cavity of the fastening body (8) through the first strip hole (811), and the lower end of the second pressing plate (52) is movably inserted into the inner cavity of the fastening body (8) through the second strip hole (812). The inner cavity of the body (8) is provided, when the adjustable fastening device is used to fasten the contacts of the switch device (3), the staff rotates the operating handle (6) to drive the eccentric body (4) to rotate, the edge of the eccentric body (4) squeezes the bottom surface (81) of the fastening body (8), and the bottom end of the fastening body (8) squeezes the contacts of the switch device (3); a second nut (9) is fixed to the top end of the rod body (1), and the second nut (9) supports the bottom surface (81) of the fastening body (8); the eccentric body (4) is in the shape of a round cake.

2. The adjustable fastening device according to claim 1, characterized in that: The operating handle (6) is an operating rod (61) or an operating ring (62), one end of the operating rod (61) is fixedly connected to the circumference of the eccentric body (4), and the operating rod (61) is provided with anti-slip grooves (611).

3. The adjustable fastening device according to claim 2, characterized in that: The edge end of the operating ring (62) is fixedly connected to the circumference of the eccentric body (4), and the inner diameter of the operating ring (62) matches the diameter of the external insulating operating rod (7).

4. The adjustable fastening device according to claim 3, characterized in that: The rod body (1) is provided with a thread (11), and the bottom end of the rod body (1) is fixed to one side of the switch device (3) by a first nut (2).

5. A disconnector with an adjustable fastening device, characterized in that: The invention comprises an isolating switch body (10), a first adjustable fastening device (12) and a second adjustable fastening device (13); a moving contact (101) is provided on one side of the isolating switch body (10), and a stationary contact (102) is provided on the other side; the first adjustable fastening device (12) is connected to the moving contact (101), and the second adjustable fastening device (13) is connected to the stationary contact (102); the first adjustable fastening device (12) comprises a rod body (1) for connecting contacts on both sides of a switch device (3); the bottom end of the rod body (1) is fixed to one side of the switch device (3); and the invention also comprises an eccentric body (4), a pressure plate (5) and an operating handle (6); the pressure plate (5) comprises a first pressure plate (51) and a second pressure plate (52). A second pressing plate (52), the upper end of the first pressing plate (51) is hinged to the first eccentric point (41) of the eccentric body (4), the upper end of the second pressing plate (52) is hinged to the second eccentric point (42) of the eccentric body (4), the lower end of the first pressing plate (51) and the lower end of the second pressing plate (52) are both fixedly connected to the top of the rod body (1), the eccentric body (4) is installed in the gap (53) between the first pressing plate (51) and the second pressing plate (52), the operating handle (6) is fixedly connected to the circumference of the eccentric body (4), when the staff rotates the operating handle (6), the eccentric body (4) is driven to rotate in the gap (53), and the edge of the eccentric body (4) squeezes the contact of the switch device (3); The first adjustable fastening device (12) and the second adjustable fastening device (13) have the same structure.

Images