Electric porcelain insulator capable of preventing cable from loosening

Abstract

The invention relates to the technical field of insulators, in particular to an electric porcelain insulator capable of preventing a cable from loosening, which comprises an electric porcelain insulator body, a connecting handle is fixed at the top end of the electric porcelain insulator body, a hoop plate is lapped above the connecting handle, an insertion plate is fixed on the bottom surface of the hoop plate, a screw rod is fixed on the bottom surface of the insertion plate, and a screw rod is fixed on the bottom surface of the screw rod. The inserting plate is inserted into the top face of the connecting handle, the screw penetrates through the bottom face of the connecting handle, and the bottom end of the screw is sleeved with a nut in a screwed mode. The beneficial effects are that the electrical porcelain insulator capable of preventing the cable from loosening forms a multi-channel connection structure through the cooperative use of the hoop plates, the insertion plates, the positioning insertion blocks, the elastic rubber bands and other components, and effectively prevents the cable from loosening. And the cable can be stably fixed even in a severe environment or in a long-term use process.

Description

Technical Field

[0001] The invention relates to the technical field of insulators, in particular to an electric porcelain insulator capable of preventing a cable from loosening. Background Art

[0002] In the power system, the fixing and insulation of cables are crucial. Traditional cable fixing methods often use simple binding or clamping methods, but these methods are prone to loosening of cables or degradation of insulation performance after long-term use or in harsh environments, which poses a hidden danger to the stable operation of the power system. Therefore, a more reliable and stable cable fixing and insulation device is needed.

[0003] As a common power equipment, porcelain insulators have good insulation performance and mechanical strength and are widely used in power system lines. However, traditional porcelain insulators have shortcomings in cable fixation and often cannot effectively prevent the cable from loosening. In order to solve this problem, people began to develop porcelain insulators that can prevent the cable from loosening.

[0004] At present, there are some porcelain insulators on the market that can prevent cables from loosening, but most of these products have complex structures, cumbersome installation, and high costs. At the same time, these products still have a certain risk of loosening during long-term use due to various factors. Therefore, there is a need for a porcelain insulator that has a simple structure, is easy to install, has a moderate cost, and can effectively prevent cables from loosening. Summary of the invention

[0005] The object of the present invention is to provide a porcelain insulator capable of preventing a cable from loosening, so as to solve the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric porcelain insulator capable of preventing a cable from loosening, comprising an electric porcelain insulator body, a connecting handle fixed to the top of the electric porcelain insulator body, a hoop plate overlapped above the connecting handle, a plug plate fixed to the bottom of the hoop plate, a screw rod fixed to the bottom of the plug plate, the plug plate plugged into the top of the connecting handle, the screw rod penetrates the bottom of the connecting handle, and a nut is threadedly sleeved on the bottom end of the screw rod;

[0007] Elastic hanging pieces are fixed on the bottom surfaces of both ends of the hoop plate, and a clamping strip is integrally formed at the bottom end of the elastic hanging piece, and the clamping strip is plugged into the side wall of the connecting handle;

[0008] Positioning plugs are inserted on both sides of the connecting handle, and one end of the positioning plug is inserted on the surface of the plug board;

[0009] A limiting handle is fixed on the top surface of the connecting handle, the limiting handle passes through the bottom plate of the hoop plate, a stopper is rotatably connected to the top surface of the limiting handle, and the bottom plate of the hoop plate is clamped between the stopper and the connecting handle.

[0010] Preferably, the connecting handle is in the shape of a square block, a wire slot is formed on the top surface of the connecting handle, the wire slot is in the shape of an arc-shaped groove, and the hoop plate is in the shape of an "Ω"-shaped plate structure.

[0011] Preferably, a slot is formed on the top surface of the connecting handle. There are two slots, and the two slots are symmetrically distributed with respect to the wire slot. The depth of the slot is less than the height of the connecting handle. The insertion plates and the slots correspond one by one, and the insertion plates are inserted into the slots. The height of the insertion plates is equal to the height of the slots.

[0012] Preferably, side grooves are formed on both sides of the connecting handle, and sockets are formed on the surfaces of the side grooves. The positioning insertion blocks are inserted into the sockets. The height of the sockets is less than the height of the side grooves. One end of the positioning insertion block is inserted into the positioning slot, and the positioning slot is formed on the surface of the insertion plate.

[0013] Preferably, a traction piece is fixed to the other end of the positioning insertion block. The plate width of the traction piece is equal to the width of the side groove. A reserved groove is formed on the surface of the traction piece. The reserved groove is in the shape of a "匚"-shaped groove. An elastic rubber band II is fixed to the surface of the reserved groove. The two ends of the elastic rubber band II are respectively fixed to the two parallel side walls of the side groove. When the elastic rubber band II is in the initial state, the positioning insertion block passes through the socket and is inserted into the positioning slot, and a slope is provided at one end of the positioning insertion block inserted into the positioning slot, with the slope facing upwards. A pull ring is fixed to the other end of the positioning insertion block.

[0014] Preferably, the strip is in the shape of a right trapezoid strip, with the slope of the strip facing downwards. After the hoop plate is lapped on the top surface of the connecting handle, the strip is inserted into the side groove, and the top surface of the strip abuts against the lower part of the top surface of the side groove. A picking groove is formed on the bottom surface of the elastic hanging piece.

[0015] Preferably, a perforation is formed on the bottom surface of the slot. A screw rod is inserted into the perforation. A notch is formed at the bottom end of the screw rod. The height of the notch is less than the length of the screw rod extending out of the perforation. An elastic rubber band I is inserted into the notch. The two ends of the elastic rubber band I are both fixed to the bottom surface of the connecting handle, and the two ends of the elastic rubber band I are respectively distributed on both sides of the perforation. That is, after the insertion plate is inserted into the slot, the screw rod passes through the perforation and then the elastic rubber band I is tensioned and deformed. After a nut is sleeved and screwed on the rod body of the screw rod, the elastic rubber band I is clamped between the nut and the screw rod.

[0016] Preferably, through holes are formed on both bottom plates of the hoop plate. A limiting handle passes through the through holes, and the height of the limiting handle is greater than the depth of the through holes. A limiting groove is formed on the top surface of the limiting handle. The limiting groove is in the shape of an arc-shaped groove. The bottom surface of the limiting groove and the top surface of the bottom plate of the hoop plate are coplanar. A limiting shaft is centrally fixed to the bottom surface of the limiting groove. The limiting shaft is in the shape of a "T"-shaped cylinder. The limiting shaft passes through the perforation, and the perforation is formed on the surface of the block.

[0017] Preferably, a rubber sleeve is fixedly mounted on the rod body of the limiting shaft, and the rubber sleeve is clamped between the through hole and the limiting shaft to generate elastic deformation, and the stopper retracts into the limiting groove after rotating around the limiting shaft as the central axis.

[0018] Preferably, a rubber clamp is fixed to the inner annular surface of the hoop plate, and a rubber gasket is fixed to the surface of the cable duct.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The electric porcelain insulator for preventing the loosening of the cable proposed by the present invention forms a multi-channel connection structure through the coordinated use of components such as a hoop plate, a plug plate, a positioning plug block, and an elastic rubber band, thereby effectively preventing the loosening of the cable. Even in a harsh environment or during long-term use, the cable can be stably fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a front view of the structure of the present invention;

[0023] Figure 3 for Figure 2 Structural cross-section view at AA in the middle;

[0024] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0025] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 6 for Figure 4 A magnified schematic diagram of the structure at C in the middle;

[0027] Figure 7 for Figure 4 A magnified schematic diagram of the structure at D in the middle;

[0028] Figure 8 This is a schematic diagram of the connecting handle structure of the present invention;

[0029] Fig. 9 for Figure 8 The enlarged schematic diagram of the structure at E in the middle;

[0030] Fig.10 This is a schematic diagram of the connection structure between the positioning plug and the traction piece of the present invention;

[0031] Fig.11 It is a schematic diagram of the connection structure of the hoop plate and the plug plate of the present invention;

[0032] Fig.12It is a schematic diagram of the structure of the limiting handle of the present invention.

[0033] In the figure: an insulator body 1, a connecting handle 2, a wire groove 3, a hoop plate 4, a plug plate 5, a slot 6, a screw 7, a perforation 8, a missing slot 9, an elastic rubber band 1 10, a nut 11, a side groove 12, a socket 13, a positioning plug 14, a positioning slot 15, a traction piece 16, a reserved slot 17, an elastic rubber band 2 18, a pull ring 19, an elastic hanging piece 20, a card strip 21, a pick-up slot 22, a perforation 23, a limiting handle 24, a limiting slot 25, a limiting shaft 26, a rubber sleeve 27, a perforation 28, a stopper 29, a rubber gasket 30, and a rubber splint 31. DETAILED DESCRIPTION

[0034] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 12, the present invention provides a technical solution: an electric porcelain insulator capable of preventing cable loosening, including an electric porcelain insulator body 1, a connecting handle 2 is fixed at the top of the electric porcelain insulator body 1, a hoop plate 4 is lapped above the connecting handle 2, a rubber clamping plate 31 is fixed on the inner ring surface of the hoop plate 4, a rubber gasket 30 is fixed on the surface of the wire groove 3, a plug board 5 is fixed at the bottom of the hoop plate 4, a screw rod 7 is fixed at the bottom of the plug board 5, the plug board 5 is inserted into the top surface of the connecting handle 2, the screw rod 7 penetrates through the bottom surface of the connecting handle 2, the connecting handle 2 is in the shape of a square block, a wire groove 3 is opened on the top surface of the connecting handle 2, the wire groove 3 is in the shape of an arc groove, the hoop plate 4 is in the shape of an "Ω" - shaped plate structure, two slots 6 are opened on the top surface of the connecting handle 2, the two slots 6 are symmetrically distributed with respect to the wire groove 3, the depth of the slot 6 is less than the height of the connecting handle 2, the plug board 5 and the slot 6 correspond one by one, the plug board 5 is inserted into the slot 6, the height of the plug board 5 is equal to the height of the slot 6, positioning plug blocks 14 are inserted into both sides of the connecting handle 2, one end of the positioning plug block 14 is inserted into the surface of the plug board 5; side grooves 12 are opened on both sides of the connecting handle 2, sockets 13 are opened on the surface of the side grooves 12, the positioning plug blocks 14 are inserted into the sockets 13, the height of the socket 13 is less than the height of the side groove 12, one end of the positioning plug block 14 is inserted into a positioning slot 15, the positioning slot 15 is opened on the surface of the plug board 5; the other end of the positioning plug block 14 is fixed with a traction piece 16, the plate width of the traction piece 16 is equal to the width of the side groove 12, a reserved groove 17 is opened on the surface of the traction piece 16, the reserved groove 17 is in the shape of a "匚" - shaped groove, an elastic rubber band two 18 is fixed on the surface of the reserved groove 17, both ends of the elastic rubber band two 18 are respectively fixed on two parallel side walls of the side groove 12, when the elastic rubber band two 18 is in the initial state, the positioning plug block 14 passes through the socket 13 and is inserted into the positioning slot 15, and one end of the positioning plug block 14 inserted into the positioning slot 15 is provided with an inclined surface facing upwards, and a pull - ring 19 is fixed at the other end of the positioning plug block 14.

[0036] When in use, lean the wire body against the wire groove 3, then press the hoop plate 4 on the wire body, and push the hoop plate 4 to move towards the connecting handle 2. During this process, the plug board 5 squeezes and pushes the positioning plug block 14 along the inclined surface to retract into the socket 13. At this time, the elastic rubber band two 18 is tensioned by the positioning plug block 14 to generate elastic deformation. Until the plug board 5 is completely inserted into the slot 6, at this time, the positioning plug block 14 and the positioning slot 15 correspond, and the elastic rubber band two 18 rebounds to drive the positioning plug block 14 to be inserted into the positioning slot 15, thus completing the first connection structure between the hoop plate 4 and the connecting handle 2. When it is necessary to disassemble the plug board 5, pinch the pull - ring 19 to tension the positioning plug block 14 to push it out of the positioning slot 15, and then lift the hoop plate 4 to pull the plug board 5 out of the slot 6.

[0037] Elastic hanging pieces 20 are fixed on the bottom surfaces of both ends of the hoop plate 4, and a clamping strip 21 is integrally formed at the bottom end of the elastic hanging piece 20, and the clamping strip 21 is plugged into the side wall of the connecting handle 2; the clamping strip 21 is a right-angle trapezoidal strip, and the inclined surface of the clamping strip 21 faces downward. After the hoop plate 4 is overlapped on the top surface of the connecting handle 2, the clamping strip 21 is plugged into the side groove 12, and the top surface of the clamping strip 21 is against the bottom of the top surface of the side groove 12, and the bottom surface of the elastic hanging piece 20 is provided with a picking groove 22. When in use, when the plug plate 5 is fully inserted into the slot 6 and is limited by the positioning plug block 14, the clamping strip 21 extends into the side groove 12, and the hoop plate 4 is firmly limited on the connecting handle 2 by the traction of the elastic hanging piece 20; forming a second connection structure of the connecting handle 2 and the hoop plate 4, and the second connection structure and the first connection structure are completed at the same time.

[0038] A through hole 8 is provided on the bottom surface of the slot 6, and the screw rod 7 is inserted in the through hole 8, and a nut 11 is threadedly sleeved on the bottom end of the screw rod 7; a notch 9 is provided on the bottom end of the screw rod 7, and the height of the notch 9 is less than the length of the screw rod 7 extending out of the through hole 8, and an elastic rubber band 10 is inserted inside the notch 9, and both ends of the elastic rubber band 10 are fixed on the bottom surface of the connecting handle 2, and the two ends of the elastic rubber band 10 are respectively distributed on both sides of the through hole 8, that is, after the plug plate 5 is inserted into the slot 6, the screw rod 7 passes through the through hole 8 and the elastic rubber band 10 is stretched and deformed, and after the nut 11 is sleeved and threaded on the rod body of the screw rod 7, the elastic rubber band 10 is clamped between the nut 11 and the screw rod 7.

[0039] When in use, when the screw rod 7 has not penetrated the perforation 8, the elastic rubber band 10 is in the initial state. The elastic rubber band 10 in the initial state is placed flat on the bottom surface of the connecting handle 2. When the plug plate 5 is inserted into the slot 6 and descends, the screw rod 7 gradually extends out of the perforation 8, and the perforation 8 stretches the elastic rubber band 10 to deform until the positioning plug block 14 is inserted into the positioning slot 15 to limit the plug plate 5. At this time, the resilience of the elastic rubber band 10 makes the bottom surface of the positioning slot 15 only rest under the positioning plug block 14 to prevent the positioning plug block 14 from detaching from the positioning slot 15. Then the nut 11 is sleeved and threaded on the screw rod 7. The elastic rubber band 10 is squeezed between the nut 11 and the screw rod 7 to act as an elastic plug strip to prevent the screw 7 and the nut 11 from loosening or slipping. In this way, the elastic rubber band 10 not only realizes the connection between the fixing plug block 14 and the positioning slot 15, but also strengthens the threaded connection between the nut 11 and the screw 7; and constitutes a third connection structure connecting the connecting handle 2 and the hoop plate 4.

[0040] The top surface of the connecting handle 2 is fixed with a limiting handle 24, which passes through the bottom plate of the hoop plate 4. The top surface of the limiting handle 24 is rotatably connected with a stopper 29. The bottom plate of the hoop plate 4 is clamped between the stopper 29 and the connecting handle 2. Both bottom plates of the hoop plate 4 are provided with through-holes 23. The limiting handle 24 passes through the through-holes 23, and the height of the limiting handle 24 is greater than the depth of the through-holes 23. The top surface of the limiting handle 24 is provided with a limiting groove 25, which is an arc-shaped groove. The bottom surface of the limiting groove 25 is coplanar with the top surface of the bottom plate of the hoop plate 4. A limiting shaft 26 is fixed in the center of the bottom surface of the limiting groove 25. The limiting shaft 26 is a "T"-shaped cylinder. The limiting shaft 26 passes through the through hole 28, and the through hole 28 is provided on the surface of the stopper 29. A rubber sleeve 27 is fixed on the rod body of the limiting shaft 26. The rubber sleeve 27 is clamped between the through hole 28 and the limiting shaft 26 to generate elastic deformation. The stopper 29 retracts into the limiting groove 25 after rotating with the limiting shaft 26 as the center axis.

[0041] During use, when the hoop plate 4 needs to be installed on the connecting handle 2, first, move the block 29 to rotate around the limiting shaft 26 as the center axis until the block 29 is retracted into the limiting groove 25. Since the rubber sleeve 27 is clamped between the through hole 28 and the limiting shaft 26 to increase friction, the block 29 will not rotate around the limiting shaft 26 at will. When the hoop plate 4 is overlapped on the connecting handle 2, the limiting handle 24 passes through the through hole 23, and then the block 29 is pushed back to extend out of the limiting groove 25. At this time, the block 29 is pressed on the hoop plate 4, forming the fourth connection structure connecting the connecting handle 2 and the hoop plate 4.

[0042] The use process of porcelain insulators that can prevent cables from loosening:

[0043] Confirm the integrity of the components: ensure that the components of the porcelain insulator body 1, connecting handle 2, hoop plate 4, rubber splint 31, rubber gasket 30, plug plate 5, screw 7, positioning plug 14, traction piece 16, elastic rubber band 2 18, pull ring 19, elastic hanging piece 20, clamping strip 21, nut 11, elastic rubber band 10, limit handle 24, stop block 29, etc. are complete and intact.

[0044] Install the hoop plate 4: Place the cable in the cable groove 3 of the connecting handle 2. Press the rubber clamp 31 of the hoop plate 4 onto the cable and push the hoop plate 4 toward the connecting handle 2. The plug plate 5 docks with the slot 6: During this process, the plug plate 5 will squeeze in along the inclined surface of the positioning plug block 14, so that the positioning plug block 14 is retracted into the socket 13, and at the same time, the elastic rubber band 18 is stretched to produce elastic deformation. When the plug plate 5 is fully inserted into the slot 6, the positioning plug block 14 corresponds to the positioning slot 15, and the elastic rubber band 18 rebounds to drive the positioning plug block 14 to insert into the positioning slot 15, completing the first connection structure.

[0045] The elastic hanging piece 20 is docked with the side groove 12: At the same time, the elastic hanging piece 20 and the clamping strip 21 on the bottom surface of the hoop plate 4 will extend into the side groove 12. Through the traction of the elastic hanging piece 20, the hoop plate 4 is firmly limited on the connecting handle 2, completing the second connection structure.

[0046] Fix the screw rod 7 and the nut 11: The screw rod 7 passes through the through hole 8. After the plug plate 5 is inserted into the slot 6, the screw rod 7 will pass through the through hole 8 and stretch the elastic rubber band 10 to deform. The nut 11 is sleeved and threaded on the screw rod 7. At this time, the elastic rubber band 10 is squeezed between the nut 11 and the screw rod 7, acting as an elastic plug to prevent the screw rod 7 and the nut 11 from loosening or slipping. This constitutes the third connection structure.

[0047] Before or after installing the hoop plate 4, the stopper 29 is rotated around the limiting shaft 26 until the stopper 29 is retracted into the limiting groove 25. After the hoop plate 4 is overlapped on the connecting handle 2, the limiting handle 24 passes through the through opening 23, and then the stopper 29 is pushed back to extend out of the limiting groove 25 and press on the hoop plate 4, forming a fourth connection structure.

[0048] Confirm that all connection structures have been correctly installed and are firm and reliable. Confirm that the cable has been firmly fixed by the rubber clamp 31 and the hoop plate 4 without looseness. Carry out necessary safety tests to ensure that the insulator can work normally and meet safety requirements.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A porcelain insulator capable of preventing a cable from loosening, comprising a porcelain insulator body (1), a connecting handle (2) being fixed to the top of the porcelain insulator body (1), characterized in that: Above the connecting handle (2), a hoop plate (4) is lapped. A plug board (5) is fixed to the bottom surface of the hoop plate (4). A screw rod (7) is fixed to the bottom surface of the plug board (5). The plug board (5) is inserted into the top surface of the connecting handle (2). The screw rod (7) penetrates through the bottom surface of the connecting handle (2), and a nut (11) is sleeved and screwed on the bottom end of the screw rod (7). Elastic hanging pieces (20) are fixed to the bottom surfaces of both ends of the hoop plate (4). A clamping strip (21) is integrally formed at the bottom end of the elastic hanging piece (20). The clamping strip (21) is inserted into the side wall of the connecting handle (2). Positioning plug blocks (14) are inserted into both sides of the connecting handle (2). One end of the positioning plug block (14) is inserted into the surface of the plug board (5). A limiting handle (24) is fixed to the top surface of the connecting handle (2). The limiting handle (24) penetrates through the bottom plate of the hoop plate (4). A blocking block (29) is rotatably connected to the top surface of the limiting handle (24). The bottom plate of the hoop plate (4) is clamped between the blocking block (29) and the connecting handle (2).

2. The electric porcelain insulator capable of preventing a cable from loosening according to claim 1 is characterized in that: The connecting handle (2) is in the shape of a square block. A wire groove (3) is formed on the top surface of the connecting handle (2). The wire groove (3) is in the shape of an arc groove. The hoop plate (4) is in the shape of an "Ω" - shaped plate structure.

3. The electric porcelain insulator capable of preventing a cable from loosening according to claim 2 is characterized in that: Slots (6) are formed on the top surface of the connecting handle (2). There are two slots (6), and the two slots (6) are symmetrically distributed with respect to the wire groove (3). The depth of the slot (6) is less than the height of the connecting handle (2). The plug board (5) corresponds to the slot (6) one by one, and the plug board (5) is inserted into the slot (6). The height of the plug board (5) is equal to the height of the slot (6).

4. The electric porcelain insulator capable of preventing a cable from loosening according to claim 3 is characterized in that: Edge grooves (12) are formed on both sides of the connecting handle (2). A socket (13) is formed on the surface of the edge groove (12). The positioning plug block (14) is inserted into the socket (13). The height of the socket (13) is less than the height of the edge groove (12). One end of the positioning plug block (14) is inserted into a positioning slot (15) formed on the surface of the plug board (5).

5. The electric porcelain insulator capable of preventing a cable from loosening according to claim 4 is characterized in that: The other end of the positioning plug block (14) is fixed with a traction piece (16). The width of the traction piece (16) is equal to the width of the edge groove (12). A reserved groove (17) is formed on the surface of the traction piece (16). The reserved groove (17) is in the shape of a "匚" - shaped groove. An elastic rubber belt II (18) is fixed to the surface of the reserved groove (17). The two ends of the elastic rubber belt II (18) are respectively fixed to two parallel side walls of the edge groove (12). When the elastic rubber belt II (18) is in the initial state, the positioning plug block (14) passes through the socket (13) and is inserted into the positioning slot (15). One end of the positioning plug block (14) inserted into the positioning slot (15) has an inclined surface facing upward. A pull - ring (19) is fixed to the other end of the positioning plug block (14).

6. The electric porcelain insulator capable of preventing a cable from loosening according to claim 4 is characterized in that: The clamping strip (21) is in the shape of a right - angled trapezoidal strip. The inclined surface of the clamping strip (21) faces downward. After the hoop plate (4) is lapped on the top surface of the connecting handle (2), the clamping strip (21) is inserted into the edge groove (12), and the top surface of the clamping strip (21) abuts against the lower part of the top surface of the edge groove (12). A picking groove (22) is formed on the bottom surface of the elastic hanging piece (20).

7. The electric porcelain insulator capable of preventing a cable from loosening according to claim 3 is characterized in that: The bottom surface of the slot (6) is provided with a through hole (8), the screw rod (7) is inserted into the through hole (8), the bottom end of the screw rod (7) is provided with a notch (9), the height of the notch (9) is less than the length of the screw rod (7) extending out of the through hole (8), an elastic rubber band (10) is inserted into the inside of the notch (9), both ends of the elastic rubber band (10) are fixed to the bottom surface of the connecting handle (2), and the two ends of the elastic rubber band (10) are respectively distributed on both sides of the through hole (8), that is, after the plug plate (5) is inserted into the slot (6), the screw rod (7) passes through the through hole (8) and then the elastic rubber band (10) is stretched to deform, and after the nut (11) is sleeved and threadedly connected to the rod body of the screw rod (7), the elastic rubber band (10) is clamped between the nut (11) and the screw rod (7).

8. The electric porcelain insulator capable of preventing a cable from loosening according to claim 1 is characterized in that: The two bottom plates of the hoop plate (4) are both provided with through-holes (23), the limiting handle (24) passes through the through-holes (23), and the height of the limiting handle (24) is greater than the depth of the through-holes (23), the top surface of the limiting handle (24) is provided with a limiting groove (25), the limiting groove (25) is in the form of an arc-shaped groove, the bottom surface of the limiting groove (25) and the top surface of the bottom plate of the hoop plate (4) are coplanar, a limiting axis (26) is fixed in the center of the bottom surface of the limiting groove (25), the limiting axis (26) is in the form of a "T"-shaped cylinder, the limiting axis (26) passes through a through hole (28), and the through hole (28) is provided on the surface of the stopper (29).

9. The electric porcelain insulator capable of preventing a cable from loosening according to claim 8, characterized in that: A rubber sleeve (27) is fixedly sleeved on the rod body of the limiting shaft (26), and the rubber sleeve (27) is clamped between the through hole (28) and the limiting shaft (26) to generate elastic deformation, and the stopper (29) retracts into the limiting groove (25) after rotating with the limiting shaft (26) as the central axis.

10. The electric porcelain insulator capable of preventing a cable from loosening according to claim 1, characterized in that: A rubber clamp (31) is fixed to the inner annular surface of the hoop plate (4), and a rubber gasket (30) is fixed to the surface of the cable harness groove (3).

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