Suspension insulator tensile connecting piece

Abstract

An inner ring column is inserted between a fixing ring and an inner ring empty groove, a connecting transverse column and the other ends of a plurality of connecting rods are respectively inserted into corresponding clamping grooves, and a connecting vertical column and the connecting transverse column are in threaded connection. The connecting piece can improve the connection stability and tensile resistance between two adjacent multi-layer composite insulators. The connecting structure is characterized in that the connecting structure is composed of a lower connecting assembly and an upper connecting assembly, the lower connecting assembly is composed of an umbrella skirt, a transverse column through hole, an inner ring column and a clamping groove, one end of the inner ring column is embedded in the umbrella skirt and is close to the inner top face of the umbrella skirt, the inner ring column is of a hollow structure with an opening in the other end, the center line of the inner ring column coincides with the center line of the umbrella skirt, and the transverse column through hole is formed in the clamping groove. A plurality of clamping grooves are formed in the inner side face of the inner ring column at equal intervals in the axial direction of the inner ring column, a transverse column through hole is formed in the side face of the inner ring column, and the transverse column through hole corresponds to the clamping groove in the middle.

Description

Technical Field

[0001] The utility model discloses a suspension insulator tensile connector, which relates to a connector for connecting two adjacent multi-layer composite suspension insulators. The utility model belongs to the technical field of insulators, and particularly relates to a connector which can improve the connection stability and tensile strength between two adjacent multi-layer composite insulators by inserting an inner ring column between a fixed ring and an inner ring empty groove, inserting a connecting cross column and the other ends of a plurality of connecting rods into corresponding clamping grooves, and screwing the connecting vertical column and the connecting cross column. Background Art

[0002] Suspension insulators are generally made of insulating parts (such as porcelain parts, glass parts) and metal accessories (such as steel legs, steel caps) bonded with cement adhesive. They are widely used in the flexible busbar systems of high-voltage overhead transmission lines, power plants and substations. They mainly undertake the dual functions of electrical insulation and mechanical fixation. Existing suspension insulators are generally single-layer disc structures. The current travels a short path on its surface and the creepage distance is small. Therefore, in practical applications, multiple suspension insulators need to be connected in series. By increasing their number, the creepage distance is increased and the accumulation of rainwater is reduced, thereby preventing flashover caused by surface discharge breakdown. The higher the voltage, the more suspension insulators are required in series, resulting in larger space occupied and higher subsequent maintenance costs. In addition, there is a large gap between two adjacent suspension insulators. The larger the number of suspension insulators, the more times the current will cause local discharge due to the structural breakpoints, and the voltage resistance performance is poor.

[0003] Publication number CN108735400A discloses a disc-type suspension insulator, which includes an iron cap, an shed and a steel foot that are coaxial and arranged in sequence along the vertical direction. The iron cap is fitted on the head of the shed and the steel foot is embedded in the shed. The insulator also includes a first anti-pollution layer, which covers the outer side of the lower edge of the iron cap. The height of the first anti-pollution layer gradually decreases from the middle to the edge, and the upper surface of the first anti-pollution layer is smooth. There is a gap between the lower surface of the first anti-pollution layer and the outer side of the lower edge of the iron cap, and the lower surface of the first anti-pollution layer is spaced apart with a first protrusion and a first groove. The sheds in the above-mentioned insulator are provided with more than one sub-shed along their axial direction, which can increase the creepage distance of the insulator to a certain extent. However, the structure of each layer of sub-sheds is similar, and the outer diameter gradually decreases from top to bottom, resulting in a smaller tortuosity of the current path and a smaller creepage distance. In addition, an anti-pollution layer is only provided between two adjacent sub-sheds to increase the natural cleaning ability of rainwater, and no anti-pollution layer is provided on the surface of each sub-shed. The inclination angles of the multiple sub-sheds located in the upper layer are relatively small, so dirt and rainwater are not easy to slide naturally on the surface of the sub-sheds, which easily leads to the accumulation of dirt and rainwater. At the same time, there is a large gap between the edges of two adjacent sub-sheds, and the current will cause local discharge due to the breakpoints of the structure, resulting in poor voltage resistance.

[0004] In order to improve the above-mentioned problems, the applicant filed another Chinese utility model patent application entitled "A Multi-layer Composite Suspension Insulator". The method for connecting multiple multi-layer composite suspension insulators in series is as follows: first, the connecting pin hole of the upper multi-layer composite suspension insulator is placed between the two connecting holes of the lower multi-layer composite suspension insulator, and then the two adjacent multi-layer composite suspension insulators are connected and fixed by a locking pin. However, the above-mentioned connection method only provides a single fixation in the horizontal direction. When subjected to a large tensile force, it is easy to loosen or break, and the tensile strength is low, resulting in poor connection stability between the two adjacent multi-layer composite suspension insulators and poor mechanical fixation performance for the conductor. Summary of the Invention

[0005] In order to improve the above situation, the utility model provides a suspension insulator tensile connector that can improve the connection stability and tensile resistance between two adjacent multi-layer composite insulators by inserting the inner ring column between the fixed ring and the inner ring empty groove, and inserting the connecting horizontal column and the other ends of multiple connecting rods into the corresponding clamping grooves, and screwing the connecting vertical column and the connecting horizontal column.

[0006] The utility model is a suspension insulator tensile connector. ...

[0007] One end of the inner ring column is embedded in the umbrella skirt and close to the inner top surface of the umbrella skirt. The inner ring column is a hollow structure with an open end.

[0008] The center lines of the inner ring column and the umbrella skirt coincide with each other.

[0009] Preferably, a sealing gasket is placed on the side of the inner ring column, and the sealing gasket is made of rubber.

[0010] The inner side surface of the inner ring column is provided with a plurality of engaging grooves equidistantly along the axial direction of the inner ring column.

[0011] Preferably, the clamping groove is a trapezoidal structure with a wide bottom and a narrow groove mouth.

[0012] A transverse column through hole is provided on the side of the inner ring column, and the transverse column through hole corresponds to the middlemost clamping groove.

[0013] The lower connecting assembly is composed of a first fixing column, a second fixing column, an outer ring column, an inner ring slot, a fixing ring, a connecting rod, a first gasket, a spring, a second gasket, a connecting vertical column, a threaded hole and a connecting horizontal column.

[0014] The bottom surface of the outer ring column is placed on the top surface of the umbrella skirt.

[0015] The top surface of the outer ring column is provided with an inner ring slot, the inner ring slot is a circular structure, and the inner ring slot and the outer ring column are concentric.

[0016] The fixing ring is placed at the center of the inner ring slot, and the two ends of the fixing ring are flush with the two ends of the inner ring slot.

[0017] The wall thickness of the inner ring column is equal to the distance between the fixed ring and the inner ring slot, and the depth of the inner ring slot is equal to the length of the inner ring column. When two adjacent multi-layer composite suspension insulators are connected, the inner ring column can be inserted between the fixed ring and the inner ring slot.

[0018] The first gasket is slidably placed in the fixing ring, and the first gasket is close to an inner side surface of the fixing ring.

[0019] The second gasket is placed on the other inner side of the fixing ring.

[0020] Preferably, the first gasket and the second gasket are arc-shaped structures.

[0021] A plurality of springs are placed between the first gasket and the second gasket, one end of the spring is placed on the second gasket, and the other end of the spring is placed on one end of the connecting rod.

[0022] The other ends of the plurality of connecting rods correspond one to one with the other said snap-fitting slots except the middle one.

[0023] The other end of the connecting rod can pass through the through holes on the first gasket and the fixing ring and then be inserted into the corresponding clamping groove, and the connecting rod and the first gasket are fixedly connected.

[0024] A first fixing column is provided at one end of the connecting horizontal column, and the first fixing column is located outside the outer ring column.

[0025] The other end of the connecting horizontal column corresponds to the middlemost snap-in slot.

[0026] The other end of the connecting cross column can pass through the through hole on the outer ring column, the through hole of the cross column, the side surface of the fixing ring, the through holes of the first gasket and the second gasket and be inserted into the corresponding middle one of the said clamping grooves.

[0027] A threaded hole is provided on the side of the connecting horizontal column, and the threaded hole is close to one end of the connecting horizontal column.

[0028] A second fixing post is placed at one end of the connecting vertical post, the other end of which is threaded. The other end of the connecting vertical post passes through a through hole formed on the top surface of the outer ring post and can be screwed into the threaded hole. The connecting vertical post is placed between the inner ring slot and the outer ring post, and the length of the connecting vertical post is greater than the distance from the connecting horizontal post to the top surface of the outer ring post.

[0029] Furthermore, a non-slip sleeve is placed on the side surface of the first fixing column, and two ends of the non-slip sleeve are flush with two ends of the first fixing column;

[0030] Furthermore, the side surface of the second fixing column is sleeved with an anti-slip ring;

[0031] Preferably, there are multiple anti-slip rings, and the multiple anti-slip rings are arranged at equal distances along the side surface of the second fixing column.

[0032] The utility model also relates to a multi-layer composite suspension insulator, which is composed of an end connector, a connection hole, a steel cap, an shed, a steel foot, a tail connection pin and a connection pin hole. The shed includes three parts: a first shed, a second shed and a third shed, which are coaxially arranged from top to bottom.

[0033] The two end connectors are symmetrically placed at one end of the steel cap.

[0034] A connecting hole is provided in the middle of the end connecting piece.

[0035] The other end of the steel cap is placed at the center of the top surface of the first shed.

[0036] Preferably, the other end of the steel cap and the top surface of the first shed are connected in an arc shape, and the angle between them is 120° to 130°, and the bottom surface of the first shed is placed at the center of the top surface of the second shed.

[0037] The outer diameter of the first shed gradually increases in an arc shape from the top surface to the half point, and gradually decreases in an arc shape from the half point to the bottom surface, and the outer diameter of the bottom surface of the first shed is greater than the outer diameter of the top surface of the first shed.

[0038] The outer diameter of the second shed gradually increases in an arc shape from the top surface to the one-fifth position, remains unchanged from the one-fifth position to the two-fifth position, and gradually decreases in an arc shape from the two-fifth position to the bottom surface, and the outer diameter of the top surface of the second shed is equal to the outer diameter of the bottom surface of the second shed.

[0039] Preferably, the first shed and the second shed are connected in an arc shape, and the angle between them is 20° to 35°.

[0040] The bottom surface of the second shed is placed at the center of the top surface of the third shed, and the outer diameter of the third shed gradually decreases from the top surface to the bottom surface.

[0041] The outer diameter of the bottom surface of the second shed is smaller than the outer diameter of the top surface of the third shed, and larger than the outer diameter of the bottom surface of the third shed. Preferably, the second shed and the third shed are connected in an arc shape, and the angle between them is 35° to 40°.

[0042] The maximum outer diameter of the first shed is smaller than the maximum outer diameter of the second shed and larger than the maximum outer diameter of the third shed.

[0043] Preferably, the maximum outer diameter of the second shed is 160-180 mm, the maximum outer diameter of the first shed is 130-150 mm, and the maximum outer diameter of the third shed is 110-120 mm.

[0044] Preferably, the thickness of the shed decreases from top to bottom, the thickness of the first shed is 40-50 mm, the thickness of the second shed is 30-40 mm, and the thickness of the third shed is 20-30 mm.

[0045] Preferably, the first umbrella skirt and the second umbrella skirt, and the second umbrella skirt and the third umbrella skirt are seamlessly connected in one piece.

[0046] Preferably, the umbrella skirt is made of silicone rubber, and the surface of the umbrella skirt is coated with polydimethylsiloxane.

[0047] Preferably, a plurality of arc-shaped ridges are evenly spaced on the inner wall of the umbrella skirt.

[0048] Preferably, a plurality of waterproof eaves are equidistantly provided at one-half of the first umbrella skirt, one-fifth to two-fifths of the second umbrella skirt, and the top edge of the third umbrella skirt, and the waterproof eaves are made of PVC.

[0049] One end of the steel foot is embedded in the shed and close to the inner top surface of the first shed.

[0050] The center lines of the steel foot and the shed coincide with each other.

[0051] The height of the other end of the steel foot is less than the bottom height of the third shed.

[0052] Preferably, the connection between the steel foot and the third shed is an arc connection, and the angle between them is 130° to 140°.

[0053] One end of the tail connecting pin is placed on the other end of the steel foot.

[0054] A connecting pin hole is provided in the center of the tail connecting pin.

[0055] The steel cap, the steel foot and the shed are bonded and fixed by cement adhesive;

[0056] Furthermore, a plurality of shed convex surfaces and a plurality of shed concave surfaces without spacing are provided from the top surface to the half of the first shed, wherein the plurality of shed convex surfaces and the plurality of shed concave surfaces are respectively and correspondingly arranged on both sides of the first shed, and the two shed convex surfaces at the outermost edges are connected to the two shed concave surfaces at the outermost edges;

[0057] Furthermore, the umbrella skirt composed of the first umbrella skirt, the second umbrella skirt and the third umbrella skirt is replaced by an inclined umbrella skirt composed of a coaxial first inclined umbrella skirt, a second inclined umbrella skirt and a third inclined umbrella skirt, one end of the steel foot is embedded in the inclined umbrella skirt, and the angle between the center line of the inclined umbrella skirt and the steel foot is an acute angle.

[0058] Beneficial effects

[0059] First, by inserting the inner ring column between the fixed ring and the inner ring empty slot, and inserting the other ends of the connecting horizontal column and multiple connecting rods into the corresponding clamping slots, and screwing the connecting vertical column and the connecting horizontal column together, the connection stability and tensile strength between two adjacent multi-layer composite insulators can be improved;

[0060] Second, the spring cooperates with the connecting rod, so that the first gasket can drive the other end of the connecting rod to pass through the through hole on the fixing ring and then insert it into the corresponding clamping groove; when the connecting rod loosens and disengages from the clamping groove due to tension or external force, the elastic force of the spring will pull it back to its original position, thereby maintaining the connection stability between the connecting rod and the clamping groove and improving the tensile strength of the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a three-dimensional structural diagram of a multi-layer composite suspension insulator of the utility model;

[0062] Figure 2 This is a three-dimensional structural diagram of Example 2 of a multi-layer composite suspension insulator of the utility model;

[0063] Figure 3 This is a three-dimensional structural diagram of Example 3 of a multi-layer composite suspension insulator of the utility model;

[0064] Figure 4 This is a structural diagram of a suspension insulator tensile connector according to the present invention;

[0065] Figure 5 This is a three-dimensional structural diagram of a suspension insulator tensile connector of the utility model;

[0066] Figure 6 This is a three-dimensional structural diagram of a second embodiment of a suspension insulator tensile connector according to the present invention;

[0067] Figure 7 This is a three-dimensional structural diagram of Example 3 of a suspension insulator tensile connector of the utility model.

[0068] In the attached figure

[0069] Among them are: end connector 1, connecting hole 2, steel cap 3, first umbrella skirt 4, second umbrella skirt 5, third umbrella skirt 6, steel foot 7, tail connecting pin 8, connecting pin hole 9, umbrella skirt convex surface 10, umbrella skirt concave surface 11, first inclined umbrella skirt 12, second inclined umbrella skirt 13, third inclined umbrella skirt 14, first fixing column 15, second fixing column 16, outer ring column 17, inner ring slot 18, second gasket 19, spring 20, first gasket 21, connecting vertical column 22, threaded hole 23, connecting horizontal column 24, horizontal column through hole 25, inner ring column 26, clamping groove 27, connecting rod 28, fixing ring 29, anti-slip sleeve 30, anti-slip ring 31. DETAILED DESCRIPTION

[0070] Example 1

[0071] The utility model is a suspension insulator tensile connector. The utility model is a suspension insulator tensile connector composed of a lower connecting component and an upper connecting component.

[0072] The lower connecting assembly is composed of an umbrella skirt, a horizontal column through hole 25, an inner ring column 26 and a clamping groove 27.

[0073] One end of the inner ring column 26 is embedded in the shed and close to the inner top surface of the shed.

[0074] The inner ring column 26 is a hollow structure with an open end.

[0075] The center lines of the inner ring column 26 and the shed coincide with each other.

[0076] Preferably, a sealing gasket is placed on the side of the inner ring column 26, and the sealing gasket is made of rubber.

[0077] The inner side surface of the inner ring column 26 is provided with a plurality of engaging grooves 27 equidistantly along the axial direction of the inner ring column 26.

[0078] Preferably, the engaging groove 27 is a trapezoidal structure with a wide bottom and a narrow groove opening.

[0079] A transverse column through hole 25 is formed on the side of the inner ring column 26. The transverse column through hole 25 corresponds to the middlemost clamping groove 27.

[0080] The lower connecting assembly is composed of a first fixing column 15, a second fixing column 16, an outer ring column 17, an inner ring slot 18, a fixing ring 29, a connecting rod 28, a first gasket 21, a spring 20, a second gasket 19, a connecting vertical column 22, a threaded hole 23 and a connecting horizontal column 24.

[0081] The bottom surface of the outer ring column 17 is placed on the top surface of the umbrella skirt.

[0082] The top surface of the outer ring column 17 is provided with an inner ring slot 18. The inner ring slot 18 is a circular structure. The inner ring slot 18 and the outer ring column 17 are concentric. The fixing ring 29 is placed at the center of the inner ring slot 18. The two ends of the fixing ring 29 are flush with the two ends of the inner ring slot 18.

[0083] The wall thickness of the inner ring column 26 is equal to the distance between the fixing ring 29 and the inner ring slot 18, and the depth of the inner ring slot 18 is equal to the length of the inner ring column 26. When two adjacent multi-layer composite suspension insulators are connected, the inner ring column 26 can be inserted between the fixing ring 29 and the inner ring slot 18.

[0084] The first gasket 21 is slidably placed in the fixing ring 29 , and the first gasket 21 is close to an inner side surface of the fixing ring 29 .

[0085] The second gasket 19 is placed on the other inner side of the fixing ring 29.

[0086] Preferably, the first gasket 21 and the second gasket 19 are arc-shaped structures.

[0087] A plurality of springs 20 are placed between the first gasket 21 and the second gasket 19. One end of the spring 20 is placed on the second gasket 19, and the other end of the spring 20 is placed on one end of the connecting rod 28.

[0088] The other ends of the plurality of connecting rods 28 correspond one to one with the other engaging grooves 27 except the middle engaging groove 27.

[0089] The other end of the connecting rod 28 can pass through the through holes on the first gasket 21 and the fixing ring 29 and then be inserted into the corresponding clamping groove 27, and the connecting rod 28 and the first gasket 21 are fixedly connected.

[0090] A first fixing column 15 is provided at one end of the connecting cross column 24. The first fixing column 15 is located outside the outer ring column 17.

[0091] The other end of the connecting crossbar 24 corresponds to the middlemost snap-in slot 27.

[0092] The other end of the connecting crossbar 24 can pass through the through hole on the outer ring column 17, the crossbar through hole 25, the side surface of the fixing ring 29, the through holes on the first gasket 21 and the second gasket 19 and be inserted into the corresponding middlemost clamping groove 27.

[0093] A threaded hole 23 is formed on the side of the connecting crossbar 24. The threaded hole 23 is close to one end of the connecting crossbar 24.

[0094] The second fixing post 16 is placed at one end of a connecting vertical post 22. The other end of the connecting vertical post 22 is threaded. The other end of the connecting vertical post 22 passes through a through hole formed on the top surface of the outer ring post 17 and can be screwed into the threaded hole 23. The connecting vertical post 22 is placed between the inner ring slot 18 and the outer ring post 17. The length of the connecting vertical post 22 is greater than the distance from the connecting horizontal post 24 to the top surface of the outer ring post 17.

[0095] When in use, the number of multi-layer composite suspension insulators to be connected in series is determined based on the voltage required to be transmitted by the high-voltage overhead transmission line, the total length of the line, the height of the tower, and the maximum operating voltage of the windproof suspension insulator. When connecting two adjacent multi-layer composite suspension insulators, first insert the inner ring column 26 of the upper insulator between the fixing ring 29 and the inner ring slot 18 of the lower insulator, then hold the first fixing column 15 to pass the connecting cross column 24 through the through hole on the outer ring column 17, the cross column through hole 25 on the inner ring column 26, the side of the fixing ring 29, the through hole on the first gasket 21 and the second gasket 19, and then insert it into the corresponding inner ring column. 26, the connecting horizontal column 24 is inserted into the corresponding clamping groove 27, and during the process of being inserted into the corresponding clamping groove 27, it can drive the first gasket 21 to move in the direction of the clamping groove 27 and fit into the fixing ring 29. The first gasket 21 drives the other ends of the multiple connecting rods 28 to pass through the through holes opened in the fixing ring 29 and then insert into the corresponding clamping groove 27. Then, the second fixing column 16 is held to insert the other end of the connecting vertical column 22 into the threaded hole 23, so that the connecting vertical column 22 and the connecting horizontal column 24 are screwed together, thereby making it possible to fix two adjacent multi-layer composite suspension insulators in a fixed connection, which can effectively improve the tensile strength of the multi-layer composite suspension insulator in the high-voltage overhead transmission line.

[0096] Example 2

[0097] The difference between this embodiment and the first embodiment is that an anti-slip sleeve 30 is provided on the side of the first fixing post 15, and the two ends of the anti-slip sleeve 30 are flush with the two ends of the first fixing post 15. When in use, the friction force on the surface of the first fixing post 15 is increased, so that the operator's hand is less likely to slip when holding the first fixing post 15 to insert or remove the connecting cross post 24, so that the connecting cross post 24 can be inserted into the corresponding clamping groove 27 more stably and quickly.

[0098] Example 3

[0099] The difference between this embodiment and the first embodiment is that an anti-slip ring 31 is sleeved on the side of the second fixing column 16; there are multiple anti-slip rings 31, and the multiple anti-slip rings 31 are arranged equidistantly along the side of the second fixing column 16; when in use, the friction force on the surface of the second fixing column 16 is increased, so that the operator can obtain a more stable grip when holding the second fixing column 16 to insert or remove the connecting vertical column 22, and the connecting vertical column 22 and the connecting horizontal column 24 are screwed together more quickly;

[0100] A sealing gasket is provided on the side of the inner ring column 26. The sealing gasket is made of rubber and can fit tightly on the contact surface between the inner ring column 26, the fixing ring 29, and the inner ring slot 18. This allows the inner ring column 26 to be more firmly fixed between the fixing ring 29 and the inner ring slot 18, reducing loosening or displacement of the insulator under tension and improving the tensile strength of the insulator. It can also effectively increase the sealing between the fixing column, the fixing ring 29, and the inner ring slot 18, reducing the ingress of dirt and moisture, thereby improving the insulation resistance and the flashover voltage.

[0101] The first gasket 21 is slidably disposed within the fixing ring 29 , so that after the other end of the connecting crossbar 24 is inserted into the corresponding middlemost snap-fitting groove 27 , the first gasket 21 can drive the other ends of the multiple connecting rods 28 to move through the through holes of the fixing ring 29 and then be inserted into the corresponding other multiple snap-fitting grooves 27 . This improves the synchronization of the insertion of the multiple connecting rods 28 , improves the insertion efficiency and accuracy, makes the connection between the two adjacent insulators more stable, and can effectively resist vibration and tension.

[0102] The first gasket 21 and the second gasket 19 are designed with an arc-shaped structure. The arc-shaped structure can better fit the fixing ring 29, forming a closer contact surface, thereby improving the connection stability between the first gasket 21, the second gasket 19 and the fixing ring 29, and can more evenly disperse the force when subjected to force, thereby reducing the concentration of local stress and thus reducing the risk of damage caused by stress concentration.

[0103] A plurality of springs 20 are placed between the first gasket 21 and the second gasket 19, one end of the spring 20 is placed on the second gasket 19, and the other end of the spring 20 is placed on one end of the connecting rod 28. The first gasket 21 drives the other ends of the plurality of connecting rods 28 to pass through the through hole opened on the fixing ring 29 and then insert into the corresponding clamping groove 27. The spring 20 is in an extended state. When the connection of the insulator is subjected to tension or external force, the spring 20 can absorb part of the impact and vibration energy, play a role in buffering and shock absorption, and help reduce the damage to the connecting rod 28 by external force, and the connection stability of the insulator is better; and when the connecting rod 28 loosens and disengages from the clamping groove 27 due to tension or external force, the elastic force of the spring 20 will pull it back to its original position, thereby maintaining the connection stability of the connecting rod 28 and the clamping groove 27, and improving the tensile strength of the insulator.

[0104] The purpose of improving the connection stability and tensile strength between two adjacent multi-layer composite insulators is achieved by inserting the inner ring column 26 between the fixing ring 29 and the inner ring slot 18, and inserting the other ends of the connecting cross column 24 and the multiple connecting rods 28 into the corresponding clamping grooves 27, and screwing the connecting vertical column 22 and the connecting cross column 24.

[0105] The utility model is a suspension insulator tensile connector. The utility model is a suspension insulator tensile connector. The utility model is a suspension insulator tensile connector. The utility model is composed of an end connector 1, a connecting hole 2, a steel cap 3, an shed, a steel foot 7, a tail connecting pin 8 and a connecting pin hole 9. The shed includes three parts: a first shed 4, a second shed 5 and a third shed 6, which are coaxially arranged from top to bottom.

[0106] The two end connectors 1 are symmetrically placed at one end of the steel cap 3.

[0107] The middle of the end connector 1 is provided with a connection hole 2.

[0108] The other end of the steel cap 3 is placed at the center of the top surface of the first umbrella skirt 4.

[0109] Preferably, the other end of the steel cap 3 and the top surface of the first umbrella skirt 4 are connected in an arc shape, and the angle between them is 120° to 130°.

[0110] The bottom surface of the first shed 4 is placed at the center of the top surface of the second shed 5. The outer diameter of the first shed 4 increases gradually in an arc shape from the top surface to the half point, and decreases gradually in an arc shape from the half point to the bottom surface. The outer diameter of the bottom surface of the first shed 4 is greater than the outer diameter of the top surface of the first shed 4.

[0111] The outer diameter of the second shed 5 increases gradually in an arc shape from the top surface to the one-fifth position, remains unchanged from the one-fifth position to the two-fifth position, and decreases gradually in an arc shape from the two-fifth position to the bottom surface, and the outer diameter of the top surface of the second shed 5 is equal to the outer diameter of the bottom surface of the second shed 5. Preferably, the first shed 4 and the second shed 5 are connected in an arc shape, and the angle between them is 20° to 35°.

[0112] The bottom surface of the second shed 5 is placed at the center of the top surface of the third shed 6, and the outer diameter of the third shed 6 gradually decreases from the top surface to the bottom surface.

[0113] The outer diameter of the bottom surface of the second umbrella skirt 5 is smaller than the outer diameter of the top surface of the third umbrella skirt 6, and larger than the outer diameter of the bottom surface of the third umbrella skirt 6.

[0114] Preferably, the second umbrella skirt 5 and the third umbrella skirt 6 are connected in an arc shape, and the angle between them is 35° to 40°.

[0115] The maximum outer diameter of the first shed 4 is smaller than the maximum outer diameter of the second shed 5, and larger than the maximum outer diameter of the third shed 6. Preferably, the maximum outer diameter of the second shed 5 is 160-180 mm, the maximum outer diameter of the first shed 4 is 130-150 mm, and the maximum outer diameter of the third shed 6 is 110-120 mm.

[0116] Preferably, the thickness of the shed decreases from top to bottom. The thickness of the first shed 4 is 40-50 mm, the thickness of the second shed 5 is 30-40 mm, and the thickness of the third shed 6 is 20-30 mm.

[0117] Preferably, the first umbrella skirt 4 and the second umbrella skirt 5, and the second umbrella skirt 5 and the third umbrella skirt 6 are seamlessly connected in one piece.

[0118] Preferably, the umbrella skirt is made of silicone rubber, and the surface of the umbrella skirt is coated with polydimethylsiloxane.

[0119] Preferably, a plurality of arc-shaped ridges are equidistantly arranged on the inner wall of the umbrella skirt. Preferably, a plurality of waterproof eaves are equidistantly arranged at one-half of the first umbrella skirt 4, one-fifth to two-fifths of the second umbrella skirt 5, and the top edge of the third umbrella skirt 6, respectively. The waterproof eaves are made of PVC.

[0120] One end of the steel foot 7 is embedded in the shed and close to the inner top surface of the first shed 4.

[0121] The center lines of the steel foot 7 and the shed coincide with each other.

[0122] The height of the other end of the steel foot 7 is less than the bottom height of the third umbrella skirt 6.

[0123] Preferably, the connection between the steel foot 7 and the third shed 6 is an arc connection, and the angle between them is 130° to 140°.

[0124] One end of the tail connecting pin 8 is placed on the other end of the steel foot 7.

[0125] The center of the tail connecting pin 8 is provided with a connecting pin hole 9.

[0126] The steel cap 3, the steel foot 7 and the umbrella skirt are fixed by cement adhesive. When in use, the number of multi-layer composite suspension insulators that need to be connected in series is determined according to the voltage required to be transmitted by the high-voltage overhead transmission line, the total length of the line, the height of the tower and the maximum operating voltage of the multi-layer composite suspension insulator. The connection pin hole 9 of the upper multi-layer composite suspension insulator is placed between the two connection holes 2 of the lower multi-layer composite suspension insulator, and the two adjacent multi-layer composite suspension insulators are connected and fixed by a locking pin to electrically insulate and mechanically fix the high-voltage overhead transmission line. The composite suspension insulator with a three-layer umbrella skirt structure extends the path of current on its surface and can effectively increase the creepage distance. Therefore, under the same electrical insulation requirements, the number of composite suspension insulators required to be connected in series can be reduced, the space occupied by the transmission line can be reduced, the line layout can be optimized, the load on the tower can be reduced, and the cost of subsequent maintenance, inspection and cleaning can be lower. The fewer the number of composite suspension insulators that need to be connected in series, the fewer the number of local discharge phenomena caused by the structural breakpoints, and the stronger the voltage resistance performance.

[0127] Example 2

[0128] The difference between this embodiment and embodiment 1 is that: a plurality of unspaced shed convex surfaces 10 and a plurality of unspaced shed concave surfaces 11 are provided from the top surface to the halfway point of the first shed 4, the plurality of shed convex surfaces 10 and the plurality of shed concave surfaces 11 are respectively arranged on both sides of the first shed 4, and the two shed convex surfaces 10 at the outermost edges are connected to the two shed concave surfaces 11 at the outermost edges; when in use, the tortuosity of the surface of the first shed 4 can be increased, the travel path can be further extended, the creepage distance can be increased, and the electrical insulation performance can be improved; the roughness of the surface of the first shed 4 can be increased, so that dirty substances are not easily accumulated on the surface. When rainwater or clean liquid flows through, contaminants are more easily washed away, and the surface of the first shed 4 is cleaner, which can reduce the occurrence of flashover accidents. It can also reduce the accumulation of raindrops on the insulator surface, allowing raindrops to slide more easily along the contours of the shed convex surface 10 and the shed concave surface 11, thereby reducing the electric field distortion and discharge risk caused by water droplet accumulation. It can also optimize the electric field distribution, reduce local electric field distortion and concentration, and improve the withstand voltage performance of the first shed 4. It can also increase the rigidity of the first shed 4, making it more stable when subjected to external forces such as wind, ice and snow, helping to disperse stress and reduce damage caused by stress concentration.

[0129] Example 3

[0130] The difference between this embodiment and the first embodiment is that the shed composed of the first shed 4, the second shed 5, and the third shed 6 is replaced by a slanted shed composed of a coaxial first slanted shed 12, a second slanted shed 13, and a third slanted shed 14; one end of the steel foot 7 is embedded in the slanted shed, and the angle between the center line of the slanted shed and the steel foot 7 is an acute angle; when in use, in an environment with strong winds and heavy ice and snow, the slanted shed can help disperse stress, reduce the risk of damage or detachment of the composite suspension insulator caused by external forces such as wind pressure, ice and snow, improve the overall strength and durability of the composite suspension insulator, and make it more adaptable to different environments; when rainwater flows through, turbulence can be more easily formed on the surface of the slanted shed, forming a better water flow channel, more effectively guiding rainwater to slide along the shed surface, reducing the accumulation of pollutants on the slanted shed surface, and improving the pollution flashover resistance of the insulator;

[0131] The other end of the steel cap 3 and the top surface of the first shed 4 are connected in an arc shape with an included angle of 120° to 130°, and the connection between the steel leg 7 and the third shed 6 is connected in an arc shape with an included angle of 130° to 140°. This design can increase the contact area between the shed and the cement adhesive, enhance the connection stability between the shed and the steel cap 3 and the steel leg 7, and improve the overall mechanical strength of the insulator; help reduce electric field concentration, make the axial voltage distribution more uniform, and reduce the risk of partial discharge caused by uneven electric field; and help reduce damage to the insulator caused by stress concentration.

[0132] The first shed 4 and the second shed 5 are connected in an arc shape with an angle of 20° to 35°, and the second shed 5 and the third shed 6 are connected in an arc shape with an angle of 35° to 40°. This design can reduce the accumulation of dirt between the first shed 4 and the second shed 5, and between the second shed 5 and the third shed 6, thereby improving the self-cleaning ability of the insulator. The smaller angle between the first shed 4 and the second shed 5 can ensure that rainwater flows smoothly from the first shed 4 to the second shed 5 and reduce accumulation at the edge of the first shed 4. The larger angle between the second shed 5 and the third shed 6 can further increase the tortuosity of the creepage path, better adjust the voltage distribution of the insulator along the axial direction, make it more uniform, and thus reduce the risk of partial discharge caused by uneven electric field.

[0133] The outer diameter of the first shed 4 gradually increases in an arc shape from the top surface to the halfway point, and gradually decreases in an arc shape from the halfway point to the bottom surface. The design of the bottom outer diameter of the first shed 4 being larger than the top outer diameter of the first shed 4 can make the electric field transition smoother, reduce the risk of partial discharge caused by electric field distortion, enable the first shed 4 to withstand higher voltage levels, and improve the overall withstand voltage level of the insulator. The larger bottom outer diameter facilitates the drainage of rainwater, reduces the formation of a wet layer, and further reduces the risk of partial discharge caused by the wet layer.

[0134] The outer diameter of the second shed 5 gradually increases in an arc shape from the top surface to the one-fifth point, remains unchanged from the one-fifth point to the two-fifth point, and gradually decreases in an arc shape from the two-fifth point to the bottom surface. The design in which the outer diameter of the top surface of the second shed 5 is equal to the outer diameter of the bottom surface of the second shed 5 can better adapt to environments such as strong winds and frequent rain and snow, and maintain the stability and reliability of the insulator. During the increase in the arc shape from the top surface to the one-fifth point, the electric field gradually increases. The outer diameter from the one-fifth point to the two-fifth point remains unchanged, and the electric field remains relatively stable, making it more difficult for contaminants to stay and accumulate. During the decrease in the arc shape from the two-fifth point to the bottom surface, the electric field gradually weakens, making it easier for raindrops to be discharged, thereby improving the self-cleaning ability. The smooth transition helps reduce the risk of electric field distortion and partial discharge.

[0135] The maximum outer diameter of the first shed 4 is smaller than the maximum outer diameter of the second shed 5 and larger than the maximum outer diameter of the third shed 6. The difference in outer diameters of the different sheds enables different parts of the insulator to bear different voltage gradients, thereby more evenly distributing the voltage and improving the overall withstand voltage capability of the insulator. The second shed 5 with the largest outer diameter can form an effective creepage path on the surface of the insulator, effectively reducing the accumulation of dirt on the third shed 6, which is more difficult to clean, and improving the self-cleaning ability of the insulator.

[0136] The thickness of the shed decreases from top to bottom. The thickness of the first shed 4 is 40-50 mm, the thickness of the second shed 5 is 30-40 mm, and the thickness of the third shed 6 is 20-30 mm. The first shed 4 with the largest thickness is located at the top layer, which can withstand more wind, sun, rain and greater bending moment, thereby enhancing mechanical strength and durability. The second shed 5 with a moderate thickness can not only ensure the electrical insulation performance of the insulator, but also maintain the balance of the overall weight, and can provide an effective insulation barrier under high voltage to prevent current leakage and breakdown. The third shed 6 with the smallest thickness can assume the necessary insulation and rainproof functions.

[0137] The first shed 4 and the second shed 5, as well as the second shed 5 and the third shed 6, are integrally formed and seamlessly connected, eliminating any possible seams or interfaces, making the insulator a continuous, uninterrupted whole. This helps form a complete insulation barrier, thereby greatly improving the overall insulation performance, overall strength, and rigidity. Furthermore, the sealing performance of the insulator is increased, its water-proof capability is enhanced, the accumulation of contaminants is reduced, and the possibility of electric field distortion is reduced. Furthermore, the electric field on the surface of the insulator is uniformly distributed, reducing the risk of partial discharge.

[0138] The sheds are made of silicone rubber, and the surface of the sheds is coated with polydimethylsiloxane. The hydrophobicity of silicone rubber can reduce the accumulation of rainwater on the shed surface and the adhesion of dirt, thereby improving the insulator's anti-fouling and rainwater resistance. At the same time, its electrical insulation performance also helps to increase the creepage distance and improve the overall performance of the insulator. Polydimethylsiloxane can further improve the hydrophobicity of the sheds, causing rainwater to bead up on the insulator surface and roll off quickly, keeping the insulator surface dry and ensuring a more uniform surface voltage distribution, thereby maintaining a higher flashover voltage.

[0139] The design of multiple arc-shaped ridges equidistantly arranged on the inner wall of the shed can increase the surface area of ​​the inner surface of the shed, thereby providing more creepage paths at the same shed height, helping to increase the creepage distance and improve the electrical insulation performance of the insulator;

[0140] A plurality of waterproof eaves are equidistantly provided at one-half of the first shed 4, one-fifth to two-fifths of the second shed 5, and the top edge of the third shed 6. The waterproof eaves are made of PVC material and can guide rainwater to the outside of the insulator to prevent rainwater from directly eroding the insulator surface.

[0141] The first umbrella skirt 4, the second umbrella skirt 5 and the third umbrella skirt 6 are all designed to be tilted downward at a certain angle, so that dirt and rainwater can more easily roll off the surface of the umbrella skirt, which makes the insulator have anti-fouling and self-cleaning functions and can reduce the occurrence of flashover.

[0142] The purpose of increasing the creepage distance of the insulator, reducing the number of insulators required to be connected in series, reducing the number of local discharges caused by structural breakpoints, and improving the withstand voltage performance is achieved by coaxially arranging the first shed 4, the second shed 5, and the third shed 6 in sequence from top to bottom.

[0143] It should be noted that, unless otherwise expressly specified or limited, the terms "placed in," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections such as hemming, rivet connection, pin connection, adhesive connection, and welding connection; detachable connections such as threaded connection, snap connection, and hinge connection; or integral connection; electrical connection; direct connection; indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0144] It should be further pointed out that, when describing the above specific embodiment, for the sake of simplicity and clarity, only the differences between the above specific embodiment and other embodiments are described. However, those skilled in the art should know that the above specific embodiment itself is also an independent technical solution.

Claims

1. A suspension insulator tensile connector, characterized by: The cam is secured to the upper edge of the cam and secured to the lower edge of the cam. The cam is secured to the lower edge of the cam and secured to the lower edge of the cam. The first gasket is close to an inner side surface of the fixing ring, and the second gasket is placed on the other inner side surface of the fixing ring. Multiple springs are placed between the first gasket and the second gasket, one end of the spring is placed on the second gasket, and the other end of the spring is placed at one end of the connecting rod, and the other ends of the multiple connecting rods correspond one-to-one to the other connecting grooves except the middle one of the clamping grooves. A first fixing column is placed at one end of the connecting cross column, and the first fixing column is located on the outside of the outer ring column, and the other end of the connecting cross column corresponds to the middle one of the clamping grooves. A threaded hole is opened on the side of the connecting cross column, and the threaded hole is close to one end of the connecting cross column. The second fixing column is placed at one end of the connecting vertical column, and the other end of the connecting vertical column is threaded. The other end of the connecting vertical column passes through the through hole opened on the top surface of the outer ring column and can be screwed into the threaded hole.

2. A suspension insulator tensile connector according to claim 1, characterized in that An anti-slip sleeve is sleeved on the side surface of the first fixing column, and two ends of the anti-slip sleeve are flush with two ends of the first fixing column.

3. The suspension insulator tensile connector according to claim 1, characterized in that An anti-slip ring is sleeved on the side surface of the second fixing column; there are multiple anti-slip rings, and the multiple anti-slip rings are arranged at equal distances along the side surface of the second fixing column.

4. The suspension insulator tensile connector according to claim 1, characterized in that The inner ring column is a hollow structure with an opening at the other end. The center lines of the inner ring column and the umbrella skirt coincide with each other. A sealing gasket is arranged on the side of the inner ring column, and the sealing gasket is made of rubber.

5. The suspension insulator tensile connector according to claim 1, characterized in that The clamping groove is a trapezoidal structure with a wide bottom and a narrow groove opening, and the horizontal column through hole corresponds to the middle one of the clamping grooves.

6. The suspension insulator tensile connector according to claim 1, characterized in that The inner ring slot is a circular structure, the inner ring slot and the outer ring column are concentric, the two ends of the fixed ring are flush with the two ends of the inner ring slot respectively, the wall thickness of the inner ring column is equal to the distance between the fixed ring and the inner ring slot, and the depth of the inner ring slot is equal to the length of the inner ring column.

7. The suspension insulator tensile connector according to claim 1, characterized in that The first gasket and the second gasket are arc-shaped structures.

8. The suspension insulator tensile connector according to claim 1, characterized in that The other end of the connecting rod can pass through the through holes opened on the first gasket and the fixing ring and then be inserted into the corresponding clamping groove, and the connecting rod and the first gasket are fixedly connected.

9. The suspension insulator tensile connector according to claim 1, characterized in that The other end of the connecting horizontal column can pass through the through hole on the outer ring column, the through hole of the horizontal column, the side surface of the fixing ring, the through holes of the first gasket and the second gasket and insert into the corresponding middle one of the clamping grooves; the connecting vertical column is placed between the inner ring slot and the outer ring column; the length of the connecting vertical column is greater than the distance from the connecting horizontal column to the top surface of the outer ring column.

10. The suspension insulator tensile connector according to claim 1, characterized in that The multi-layer composite suspension insulator is composed of an end connector, a connection hole, a steel cap, an shed, a steel foot, a tail connection pin and a connection pin hole. The shed includes three parts: a first shed, a second shed and a third shed, which are coaxially arranged from top to bottom. Two end connectors are symmetrically placed at one end of the steel cap, a connection hole is opened in the middle of the end connector, and the other end of the steel cap is placed at the center of the top surface of the first shed. The other end of the steel cap and the top surface of the first shed are connected in an arc shape, and the angle between them is 120° to 130°. The bottom surface of the first shed is placed at the center of the top surface of the second shed. The outer diameter of the first shed increases gradually in an arc shape from the top surface to the half point, and decreases gradually in an arc shape from the half point to the bottom surface, and the first shed is symmetrically placed at the center of the top surface of the second shed. The outer diameter of the bottom surface of the skirt is greater than the outer diameter of the top surface of the first umbrella skirt. The outer diameter of the second umbrella skirt gradually increases in an arc shape from the top surface to one-fifth, remains unchanged from one-fifth to two-fifths, and gradually decreases in an arc shape from two-fifths to the bottom surface. The outer diameter of the top surface of the second umbrella skirt is equal to the outer diameter of the bottom surface of the second umbrella skirt. The first umbrella skirt and the second umbrella skirt are connected in an arc shape, and the angle between them is 20° to 35°. The bottom surface of the second umbrella skirt is placed at the center of the top surface of the third umbrella skirt. The outer diameter of the third umbrella skirt gradually decreases from the top surface to the bottom surface. The outer diameter of the bottom surface of the second umbrella skirt is smaller than the outer diameter of the top surface of the third umbrella skirt and larger than the outer diameter of the bottom surface of the third umbrella skirt. The second umbrella skirt and the third umbrella skirt are connected in an arc shape, and the angle between them is 20° to 35°. The angle is 35° to 40°, the maximum outer diameter of the first umbrella skirt is smaller than the maximum outer diameter of the second umbrella skirt, and larger than the maximum outer diameter of the third umbrella skirt, the maximum outer diameter of the second umbrella skirt is 160 to 180 mm, the maximum outer diameter of the first umbrella skirt is 130 to 150 mm, and the maximum outer diameter of the third umbrella skirt is 110 to 120 mm. The thickness of the umbrella skirt decreases from top to bottom, the thickness of the first umbrella skirt is 40 to 50 mm, the thickness of the second umbrella skirt is 30 to 40 mm, and the thickness of the third umbrella skirt is 20 to 30 mm. The first umbrella skirt and the second umbrella skirt, and the second umbrella skirt and the third umbrella skirt are seamlessly connected in one piece. The umbrella skirt is made of silicone rubber, and the surface of the umbrella skirt is coated with The invention relates to a protective layer 200 having a plurality of protective layers 200 mm long and a plurality of protective layers 200 mm long. The protective layer 200 mm long is provided with a plurality of protective layers 200 mm long and a plurality of protective layers 200 mm long. The protective layer 200 mm long is provided with a plurality of protective layers 200 mm long and a plurality of protective layers 200 mm long. The protective layer 200 mm long is provided with a plurality of protective layers 200 mm long and a plurality of protective layers 200 mm long. The protective layer 200 mm long is provided with a plurality of protective layers 200 mm long and a plurality of protective layers 200 mm long.The steel cap, the steel foot and the shed are bonded and fixed by cement adhesive.

Images