Transmission line tension clamp drainage plate pressing device and tension clamp

Abstract

The invention discloses a transmission line tension clamp drain plate clamping device and a tension clamp. The transmission line tension clamp drain plate clamping device expands and deforms through an inner conical expansion sleeve, thereby enabling the inner conical expansion sleeve and the contact surface micro-convexities between the drain plate and the wire clamp connecting plate to undergo plastic deformation, and transforms the point contact of the micro-convexities into surface contact, thereby increasing the actual contact area. An upper clamping plate and a lower clamping plate have a tendency to approach each other, and more pressure is applied to the drain plate and the wire clamp connecting plate, thereby enabling the contact surface micro-convexities between the drain plate and the wire clamp connecting plate to undergo plastic deformation, and transforms the point contact of the micro-convexities into surface contact, thereby increasing the actual contact area. The problem of excessive contact resistance caused by too small an actual contact area can be solved, and the problem of heating of the wire clamp caused by the small actual contact area at the drain plate of the tension clamp can be solved, thereby achieving energy saving and cooling effects.

Description

Technical Field

[0001] The invention relates to the technical field of overhead transmission lines, and in particular to a transmission line tension clamp drain plate pressing device and a tension clamp. Background Art

[0002] Transmission line tension clamps are important connection hardware for connecting conductors and transmission towers. They not only bear the full tension of the conductors, but also conduct current. On the one hand, tension clamps are subjected to the dual effects of tensile stress and voltage. On the other hand, they are easily susceptible to failure when exposed to the natural environment, which seriously endangers the safety of the line.

[0003] In recent years, transmission line tension clamps have frequently failed during service, and heating of the drain plate is an important form of failure. The main factor causing the failure of the drain plate due to heating is the increase in contact resistance at the drain plate. Since the tension clamp drain plate and the jumper clamp are connected by bolts, the decrease in the actual contact area of ​​the clamp caused by loose bolts and the corrosive substances generated by oxidation corrosion at the bolt connection will increase the contact resistance at the drain plate, causing serious wear at the drain plate connection. Therefore, a connection device is needed to increase the actual contact area between the drain plate and the jumper clamp and reduce the contact resistance to achieve energy saving and cooling. Summary of the invention

[0004] In view of the above shortcomings, the present invention provides a transmission line tension clamp drain plate clamping device and a tension clamp, which can effectively solve the problem of heating of the tension clamp caused by the small actual contact area at the drain plate of the tension clamp proposed in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A transmission line tension clamp drain plate pressing device, comprising:

[0007] An inner conical expansion sleeve, wherein a convex edge is arranged on the outer wall of one end thereof, and an external thread is arranged on the outer wall of the other end thereof, and an expansion sleeve through hole is coaxially arranged on the inner conical expansion sleeve, and a portion of the expansion sleeve through hole close to the convex edge is an inner conical through hole;

[0008] An expansion sleeve end cap, which is provided with an internal thread and is threadedly connected to the other end of the inner conical expansion sleeve;

[0009] An upper clamping device, comprising an upper clamping plate and a conical block fixedly arranged on a side surface of the upper clamping plate, wherein the conical block is provided with an internal threaded hole;

[0010] A lower clamping device, comprising a lower clamping plate, wherein the lower clamping plate is provided with a lower clamping plate through hole;

[0011] A gradient bolt, the end of which is provided with an external thread matching the internal thread hole;

[0012] The conical block of the upper clamping device is located in the inner conical through hole, and the gradient bolt passes through the through hole of the lower clamping plate and is screwed into the inner threaded hole, so that the upper clamping plate and the lower clamping plate tend to approach each other, and the conical block is embedded in the conical through hole and causes the inner conical expansion sleeve to expand and deform.

[0013] Furthermore, an O-ring groove is provided on the inner wall of the expansion sleeve through hole, and an O-ring is provided in the O-ring groove.

[0014] Furthermore, an upper pressing column is provided on the side of the upper pressing plate facing the lower pressing plate.

[0015] Furthermore, there are multiple upper clamping columns, and the multiple upper clamping columns are distributed around the conical block.

[0016] Furthermore, a circular pancake-shaped upper column foot is provided at the end of the upper pressing column.

[0017] Furthermore, a lower pressing column is provided on the side of the lower pressing plate facing the upper pressing plate.

[0018] Furthermore, there are multiple lower clamping columns, and the multiple lower clamping columns are distributed around the through hole of the lower clamping plate.

[0019] Furthermore, a circular pancake-shaped lower column foot is provided at the end of the lower clamping column.

[0020] Furthermore, the transmission line tension clamp drain plate clamping device also includes a drain plate and a clamp connecting plate, and the drain plate and the clamp connecting plate are respectively provided with through holes for the inner conical expansion sleeve to pass through, and the inner walls of the through holes of the drain plate and / or the clamp connecting plate are provided with deformation grooves so that when the inner conical expansion sleeve expands and deforms, the outer wall of the inner conical expansion sleeve can be embedded in the deformation groove.

[0021] The present invention also provides a tension clamp, comprising the transmission line tension clamp drain plate pressing device as described in any one of the above items.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention expands and deforms the inner conical expansion sleeve, so that the micro-convex bodies on the contact surface between the inner conical expansion sleeve and the drainage plate and the wire clamp connecting plate can be plastically deformed, and the contact state of the micro-convex bodies between the inner conical expansion sleeve and the drainage plate and the wire clamp connecting plate can be changed, and the point contact of the micro-convex bodies can be converted into surface contact to increase the actual contact area, which can solve the problem of excessive contact resistance caused by too small actual contact area, and solve the problem of heating of the wire clamp caused by the small actual contact area at the drainage plate of the tension wire clamp, so as to achieve energy saving and cooling effects;

[0024] 2. The upper clamping plate and the lower clamping plate have a tendency to approach each other, which applies more pressure to the drainage plate and the wire clamp connecting plate, causing the micro-convex bodies on the contact surface between the drainage plate and the wire clamp connecting plate to undergo plastic deformation, changing the contact state of the micro-convex bodies between the connecting plates, and transforming the point contact of the micro-convex bodies into surface contact, thereby increasing the actual contact area. At the same time, due to the large clamping area, the bolt opening amount of the traditional drainage plate connection can be reduced, reducing the overheating problem caused by loose bolt holes, and reducing losses, thereby achieving energy-saving effects;

[0025] 3. The material of the inner conical expansion sleeve of the present invention is aluminum alloy, which can play a role of flow passage, and at the same time increases the flow area and reduces heat generation and loss;

[0026] 4. The present invention applies radial force by extruding the conical block, and utilizes the deformation of the O-ring and the inner conical expansion sleeve to achieve a sealing effect, thereby preventing corrosion caused by the entry of corrosive media such as environmental water vapor into the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0029] Figure 2 This is an explosion diagram of Example 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the inner conical expansion sleeve in Example 1 of the present invention;

[0031] Figure 4 It is an isometric cross-sectional view of the inner conical expansion sleeve in Example 1 of the present invention;

[0032] Figure 5 It is a schematic structural diagram of the upper clamping device in Example 1 of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the lower clamping device in Example 1 of the present invention;

[0034] Figure 7 This is a schematic diagram of the implementation of Example 1 of the present invention;

[0035] Figure 8 Schematic diagram of the implementation of Example 1 of the present invention (cross-sectional view);

[0036] Fig. 9 It is a schematic diagram of the change of the actual contact area between the inner conical expansion sleeve and the guide plate in the present invention;

[0037] Fig.10It is a schematic diagram of the change of the actual contact area between the guide plate and the wire clamp connecting plate in the present invention;

[0038] Fig.11 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0039] Fig.12 It is a schematic diagram of the structure of Embodiment 2 of the present invention (cross-sectional view);

[0040] Fig.13 It is a schematic diagram of the inner conical expansion sleeve in the present invention when it expands, deforms and embeds into the deformation groove.

[0041] Among them, the markings shown in the figure are: 10-expansion sleeve end cover; 20-inner conical expansion sleeve; 21-expansion sleeve through hole; 22-convex edge; 23-inner conical through hole; 24-O-ring groove; 25-O-ring; 26-accommodating chamber; 30-upper clamping device; 31-upper clamping plate; 32-conical block; 33-inner threaded hole; 34-upper clamping column; 35-upper column foot; 40-lower clamping device; 41-lower clamping plate; 42-lower clamping plate through hole; 44-lower clamping column; 45-lower column foot; 50-gradient bolt; 60-drainage plate; 70-clamp connecting plate; 80-deformation groove. DETAILED DESCRIPTION

[0042] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment 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.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] Please refer to Figures 1 to 6 A preferred embodiment of the present invention provides a transmission line tension clamp drain plate clamping device, which mainly includes an expansion sleeve end cover 10, an inner conical expansion sleeve 20, an upper clamping device 30, a lower clamping device 40 and a gradient bolt 50.

[0047] The inner conical expansion sleeve 20 is cylindrical in shape as a whole. A convex edge 22 is provided on the outer wall of one end of the cylindrical inner conical expansion sleeve 20. The convex edge 22 is annular and surrounds the outer periphery of the end of the inner conical expansion sleeve 20. In a preferred embodiment, the convex edge 22 is integrally formed with the inner conical expansion sleeve 20, and an external thread is provided on the outer wall of the other end of the inner conical expansion sleeve 20. The inner conical expansion sleeve 20 is coaxially provided with an expansion sleeve through hole 21, and the part of the expansion sleeve through hole 21 close to the convex edge 22 is an inner conical through hole 23, and the inner conical through hole 23 is a larger opening facing outward; the expansion sleeve through hole 21 is a through hole of equal diameter near the end with the external thread, and the expansion sleeve through hole 21 also has an equiaxially arranged accommodating cavity 26 near the inner conical through hole 23, and the accommodating cavity 26 is a circular through hole, and its inner diameter is equal to the inner diameter at the smaller end of the inner conical through hole 23, and is slightly larger than the inner diameter of the expansion sleeve through hole 21. The inner conical expansion sleeve 20 is preferably made of aluminum alloy. In an exemplary embodiment, the inner conical expansion sleeve 20 is made of soft aluminum, which has good electrical conductivity and plasticity and is easy to realize the compressive expansion deformation of the inner conical expansion sleeve 20. At the same time, the inner conical expansion sleeve 20 made of soft aluminum can play a flow-through role, increase the flow-through area and reduce heat and loss.

[0048] In a preferred embodiment, an O-ring groove 24 is provided on the inner wall of the expansion sleeve through hole 21, and an O-ring 25 is provided in the O-ring groove 24. During implementation, the gradient bolt 50 passes through the O-ring 25 and presses the O-ring 25 into the O-ring groove 24 to perform a sealing function to prevent rust caused by corrosive media such as environmental water vapor entering the device.

[0049] The expansion sleeve end cap 10 is an annular structure as a whole, and is coaxially provided with an internal thread and is threadedly connected with the other end of the inner conical expansion sleeve 20. During implementation, the convex edge 22 and the external thread end of the inner conical expansion sleeve 20 are respectively located on both sides of the stacked and connected guide plate and the wire clamp connecting plate. At this time, by screwing the expansion sleeve end cap 10 into the external thread end of the inner conical expansion sleeve 20, the inner conical expansion sleeve 20 can be initially fixed on the guide plate and the wire clamp connecting plate. At this time, the expansion sleeve end cap 10 has a positioning function. The expansion sleeve end cap 10 is preferably made of aluminum alloy.

[0050] The upper clamping device 30 includes an upper clamping plate 31 and a conical block 32 fixedly arranged at one side of the upper clamping plate 31. The upper clamping plate 31 is a plate-like structure. The conical block 32 is a flat-topped conical structure as a whole, and its smaller end is far away from the upper clamping plate 31. The conical block 32 is provided with an internal threaded hole 33, and the internal threaded hole 33 extends inward from the end of the conical block 32. The taper of the conical block 32 is consistent with the taper of the inner conical through hole 23, but the height of the conical block 32 is greater than the depth of the conical through hole 23. When implemented, the conical block 32 is located in the inner conical through hole 23, so that when the conical block 32 is continuously pressed and moves toward the inner direction of the inner conical through hole 23, it can exert a radial force on the inner conical through hole 23 to force the inner conical expansion sleeve 20 to expand and deform.

[0051] An upper clamping column 34 is also provided on the side of the upper clamping plate 31 facing the lower clamping plate 41. At this time, the upper clamping column 34 faces the drain plate and the wire clamp connecting plate and can contact the drain plate or the wire clamp connecting plate to tighten the drain plate and the wire clamp connecting plate. In order to achieve a good and uniform tightening effect, there are multiple upper clamping columns 34, and the multiple upper clamping columns 34 are distributed around the conical block 32. In a specific embodiment, the upper clamping plate 31 is square, and there are four upper clamping columns 34, which are distributed on the four corners of the square upper clamping plate 31, to achieve multi-point and uniform clamping and ensure the clamping effect. Furthermore, a circular pancake-shaped upper column foot 35 is provided at the end of the upper clamping column 34, and the end face area of ​​the circular pancake-shaped upper column foot 35 is larger than the cross-sectional area of ​​the upper clamping column 34, thereby increasing the contact area with the guide plate or the wire clamp connecting plate, increasing the clamping action surface, ensuring the clamping effect, and avoiding damage to the guide plate or the wire clamp connecting plate.

[0052] The upper clamping plate 31, the conical block 32, the upper clamping column 34 and the upper column foot 35 are preferably made of cast iron to ensure a certain degree of hardness. The conical block 32 is fixed to the upper clamping plate 31 by welding, the upper clamping column 34 and the upper column foot 35 are integrally formed, and the upper clamping column 34 is fixed to the upper clamping plate 31 by welding.

[0053] The lower clamping device 40 includes a lower clamping plate 41 . The upper clamping plate 31 is a plate-shaped structure. The lower clamping plate 41 is provided with a lower clamping plate through hole 42 . The lower clamping plate through hole 42 can allow the gradient bolt 50 to pass through.

[0054] A lower clamping column 44 is also provided on the side of the lower clamping plate 41 facing the upper clamping plate 31. At this time, the lower clamping column 44 faces the drain plate and the wire clamp connecting plate and can contact the drain plate or the wire clamp connecting plate to tighten the drain plate and the wire clamp connecting plate. In order to achieve a good and uniform tightening effect, there are multiple lower clamping columns 44, and the multiple lower clamping columns 44 are distributed around the lower clamping plate through hole 42. In a specific embodiment, the lower clamping plate 41 is square, and there are four lower clamping columns 44, which are distributed on the four corners of the square lower clamping plate 41, to achieve multi-point and uniform clamping and ensure the clamping effect. Furthermore, a circular pancake-shaped lower column foot 45 is provided at the end of the lower clamping column 44, and the end face area of ​​the circular pancake-shaped lower column foot 45 is larger than the cross-sectional area of ​​the lower clamping column 44, thereby increasing the contact area with the guide plate or the wire clamp connecting plate, increasing the clamping action surface, ensuring the clamping effect, and avoiding damage to the guide plate or the wire clamp connecting plate.

[0055] The lower clamping plate 31, the lower clamping column 44 and the lower column foot 45 are preferably made of cast iron to ensure a certain degree of hardness. The lower clamping column 44 and the lower column foot 45 are integrally formed, and the lower clamping column 44 is fixed to the lower clamping plate 41 by welding.

[0056] The lower clamping column 44 and the upper clamping column 34 are arranged opposite to each other to ensure that the two sides of the guide plate and the wire clamp connecting plate stacked together are subjected to force as evenly as possible and in the same direction when connected.

[0057] The end of the gradient bolt 50 is provided with an external thread matching the internal thread hole 33. The gradient bolt 50 is a two-stage type, with a larger diameter at the head end and a smaller diameter at the end end. The smaller diameter end is provided with an external thread matching the internal thread hole 33 so as to be screwed into the internal thread hole 33 during implementation. The larger diameter head end passes through the expansion sleeve through hole 21 and can squeeze the O-ring 25 and press the O-ring 25 into the O-ring groove 24 to play a sealing role. The gradient bolt 50 is preferably made of cast iron to ensure a certain hardness.

[0058] The conical block 32 of the upper clamping device 30 is located in the inner conical through hole 23, and the gradient bolt 50 passes through the lower clamping plate through hole 42 and is screwed into the internal threaded hole 33. In the process of the gradient bolt 50 continuously being screwed into the lower clamping plate through hole 42, the upper clamping plate 31 and the lower clamping plate 41 tend to approach each other. At this time, the conical block 32 is embedded in the conical through hole 23 and causes the inner conical expansion sleeve 20 to expand and deform.

[0059] The following is a more specific exemplary implementation of this preferred embodiment: Please refer to Figure 7 and Figure 8, the guide plate 60 and the wire clamp connecting plate 70 to be connected are stacked together, and the guide plate 60 and the wire clamp connecting plate 70 are respectively provided with through holes for the inner conical expansion sleeve 20 to pass through, and the inner diameter of the through hole is consistent with the outer diameter of the inner conical expansion sleeve 20, and the inner conical expansion sleeve 20 passes through the through holes of the guide plate 60 and the wire clamp connecting plate 70, and the inner conical expansion sleeve 20 first passes through the guide plate 60 and then passes through the wire clamp connecting plate 70, and the convex edge 22 of the inner conical expansion sleeve 20 is attached to the side of the guide plate 60 to achieve the limit through the guide plate 60, and the inner conical expansion sleeve 20 is provided with The other end of the thread passes through the guide plate 60 and the wire clamp connecting plate 70, and the expansion sleeve end cover 10 is screwed into the threaded end of the inner conical expansion sleeve 20 and fits the side of the wire clamp connecting plate 70; the conical block 32 is inserted into the inner conical through hole 23 and fits the inner wall of the inner conical through hole 23. At this time, the upper column foot 35 of the upper clamping column 34 of the upper clamping device 30 has a slight gap with the side of the guide plate 60 or just fits the guide plate 60, and the lower column foot 45 of the lower clamping column 44 of the lower clamping device 40 fits the side of the wire clamp connecting plate 70, and the lower clamping The column 44 and the upper clamping column 34 are arranged opposite to each other. At this time, the lower clamping plate through hole 42 of the lower clamping column 44 is opposite to the expansion sleeve through hole 21 of the inner conical expansion sleeve 20 and the internal threaded hole 33 of the conical block 32, and the lower clamping column 44 of the lower clamping device 40 does not contact the expansion sleeve end cover 10; the gradient bolt 50 is sequentially inserted into the lower clamping plate through hole 42, the expansion sleeve through hole 21 and screwed into the internal threaded hole 33. When the gradient bolt 50 passes through the expansion sleeve through hole 21, the O-ring 25 is pressed into the O-ring groove 24 to play a sealing role. When the gradient bolt 50 is tightened Under the action, the upper clamping plate 31 and the lower clamping plate 41 have a tendency to approach each other, the conical block 32 is embedded in the conical through hole 23 and exerts a large radial force on the inner conical expansion sleeve 20, so that the inner conical expansion sleeve 20 expands and deforms, thereby enabling the micro-convex bodies on the contact surface between the inner conical expansion sleeve 20 and the guide plate 60 and the wire clamp connecting plate 70 to undergo plastic deformation, changing the contact state of the micro-convex bodies between the inner conical expansion sleeve 20 and the guide plate 60 and the wire clamp connecting plate 70, and transforming the point contact of the micro-convex bodies into surface contact, thereby increasing the actual contact area. The effect is as follows: Fig. 9 As shown; at the same time, the gradient bolt 50 is continuously tightened, so that the upper clamping plate 31 and the lower clamping plate 41 have a tendency to approach each other, and the upper clamping column 34 of the upper clamping plate 31 and the lower clamping column 44 of the lower clamping plate 41 apply more pressure to the guide plate 60 and the wire clamp connecting plate 70, so that the micro-convex bodies on the contact surface between the guide plate 60 and the wire clamp connecting plate 70 undergo plastic deformation, changing the contact state of the micro-convex bodies between the connecting plates, and transforming the point contact of the micro-convex bodies into surface contact, thereby increasing the actual contact area. The effect is as shown in FIG. Fig.10 As shown, at the same time, due to the large clamping area, the bolt hole amount of the traditional guide plate connection can be reduced.

[0060] The conical block 32 allows the inner conical expansion sleeve 20 to expand and deform, thereby increasing the actual contact area between the inner conical expansion sleeve 20 and the guide plate 60 and the wire clamp connecting plate 70. The upper clamping plate 31 and the lower clamping plate 41 have a tendency to approach each other, which can also give more pressure to the guide plate 60 and the wire clamp connecting plate 70, thereby increasing the actual contact area between the guide plate 60 and the wire clamp connecting plate 70. Please refer to the following formula:

[0061]

[0062] It can be seen that by increasing the actual contact area with the drain plate, the problem of excessive contact resistance caused by the small actual contact area can be solved, and the problem of heating of the tension clamp caused by the small actual contact area at the drain plate of the tension clamp can be solved, thereby achieving energy saving and cooling effects.

[0063] The present preferred embodiment also provides a strain clamp, which includes the transmission line strain clamp drain plate pressing device of the present preferred embodiment. Through the transmission line strain clamp drain plate pressing device of the present preferred embodiment, the actual contact area with the drain plate can be increased, the problem of excessive contact resistance caused by the small actual contact area can be solved, and the problem of heating of the strain clamp caused by the small actual contact area at the drain plate of the strain clamp can be solved, so as to achieve energy saving and cooling effects.

[0064] Example 2

[0065] The difference from Example 1 is that, please refer to Fig.11 and Fig.12 , this preferred embodiment provides a transmission line tension clamp drain plate clamping device, the clamping device also includes a drain plate 60 and a clamp connecting plate 70, that is, the clamping device comes with a drain plate and a clamp connecting plate to replace the drain plate and the clamp connecting plate of the tension clamp, and the drain plate 60 and the clamp connecting plate 70 of the clamping device are consistent in structure with the drain plate and the clamp connecting plate of the tension clamp. The drain plate 60 and the clamp connecting plate 70 are respectively provided with through holes for the inner conical expansion sleeve 20 to pass through, and the inner wall of the through hole of the drain plate 60 is provided with a deformation groove 80, which is an annular groove, so that when the inner conical expansion sleeve 20 expands and deforms, the outer wall of the inner conical expansion sleeve 20 can be embedded in the deformation groove 80 to play a sealing role, such as Fig.13 As shown, avoid rust caused by corrosive media such as environmental water vapor entering the device.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A tension clamp and drain plate pressing device for a power transmission line, characterized in that: Included are: An inner conical expansion sleeve (20), wherein a convex edge (22) is provided on the outer wall of one end thereof, and an external thread is provided on the outer wall of the other end thereof; the inner conical expansion sleeve (20) is coaxially provided with an expansion sleeve through hole (21), and a portion of the expansion sleeve through hole (21) close to the convex edge (22) is an inner conical through hole (23); An expansion sleeve end cap (10) provided with an internal thread and threadedly connected to the other end of the internal conical expansion sleeve (20); An upper clamping device (30) comprises an upper clamping plate (31) and a conical block (32) fixedly arranged on a side surface of the upper clamping plate (31), wherein the conical block (32) is provided with an internal threaded hole (33); A lower pressing device (40) comprising a lower pressing plate (41), wherein the lower pressing plate (41) is provided with a lower pressing plate through hole (42); A gradient bolt (50), the end of which is provided with an external thread matching the internal thread hole (33); The conical block (32) of the upper clamping device (30) is located in the inner conical through hole (23), and the gradient bolt (50) passes through the lower clamping plate through hole (42) and is screwed into the inner threaded hole (33), so that the upper clamping plate (31) and the lower clamping plate (41) have a tendency to approach each other, and the conical block (32) is embedded in the conical through hole (23) and causes the inner conical expansion sleeve (20) to expand and deform; An upper pressing column (34) is also provided on the side of the upper pressing plate (31) facing the lower pressing plate (41), and the upper pressing column (34) faces the guide plate and the wire clamp connecting plate and is used to contact the guide plate or the wire clamp connecting plate to tighten the guide plate and the wire clamp connecting plate; A lower clamping column (44) is also provided on the side of the lower clamping plate (41) facing the upper clamping plate (31). The lower clamping plate (41) faces the drain plate and the wire clamp connecting plate and is used to contact the drain plate or the wire clamp connecting plate to tighten the drain plate and the wire clamp connecting plate.

2. The transmission line tension clamp drain plate pressing device according to claim 1 is characterized in that: An O-ring groove (24) is provided on the inner wall of the expansion sleeve through hole (21), and an O-ring (25) is provided in the O-ring groove (24).

3. The transmission line tension clamp drain plate pressing device according to claim 1, characterized in that: There are a plurality of upper pressing columns (34), and the plurality of upper pressing columns (34) are distributed around the conical block (32).

4. The transmission line tension clamp drain plate pressing device according to claim 1 or 3, characterized in that: A circular pancake-shaped upper column foot (35) is provided at the end of the upper pressing column (34).

5. The transmission line tension clamp drain plate pressing device according to claim 1, characterized in that: There are a plurality of lower clamping columns (44), and the plurality of lower clamping columns (44) are distributed around the through hole (42) of the lower clamping plate.

6. The transmission line tension clamp drain plate pressing device according to claim 1 or 5, characterized in that: A circular pancake-shaped lower column foot (45) is provided at the end of the lower pressing column (44).

7. The transmission line tension clamp drain plate pressing device according to claim 1, characterized in that: It also includes a guide plate (60) and a wire clamp connecting plate (70), wherein the guide plate (60) and the wire clamp connecting plate (70) are respectively provided with through holes for the inner conical expansion sleeve (20) to pass through, and a deformation groove (80) is provided on the inner wall of the through hole of the guide plate (60) and / or the wire clamp connecting plate (70), so that when the inner conical expansion sleeve (20) expands and deforms, the outer wall of the inner conical expansion sleeve (20) can be embedded in the deformation groove (80).

8. A tension clamp, characterized in that: The invention comprises a transmission line tension clamp drain plate pressing device as claimed in any one of claims 1 to 7.

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