Grease injection hole strain clamp

Abstract

The utility model relates to the technical field of hardware fittings of high-voltage transmission lines, in particular to a grease injection hole strain clamp which comprises a wire hydraulic pipe, a steel anchor fixed in the wire hydraulic pipe and a drainage hydraulic pipe fixed outside the wire hydraulic pipe. A grease injection unit is arranged on the wire hydraulic pipe and comprises an insert fixed to the wire hydraulic pipe, the insert comprises a cylindrical section and a circular truncated cone section which are integrally formed from top to bottom, the cylindrical section is close to the outer wall face of the wire hydraulic pipe, and a middle hole is axially formed in the middle of the cylindrical section. A plurality of inclined holes are evenly distributed in the circular truncated cone section in the generatrix direction and communicate with the middle hole. By optimizing and improving the structure of the grease injection hole, the resistance during conductive grease injection can be reduced, and the injection speed, smoothness and uniformity during conductive grease injection can be improved, so that the distribution uniformity of the conductive grease in the wire hydraulic pipe can be improved, the rainwater-proof effect can be enhanced, and the bulge phenomenon of the wire hydraulic pipe can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of high -voltage transmission line's hardware, concretely is the grease hole strain clamp. BACKGROUND

[0002] The strain clamp is a hardware used for fixing the conductor to bear the tension of the conductor and hanging the conductor to the strain string group or the tower.

[0003] The strain clamp is in the outdoor environment for a long time, and the conductor hydraulic pipe of the strain clamp may gradually appear the "bulge" phenomenon due to environmental factors. The bulge is the expansion and cracking of the conductor hydraulic pipe, which can cause the steel core in the conductor hydraulic pipe to be exposed and thus cause corrosion. The reason for the "bulge" of the conductor hydraulic pipe is that the rainwater flows into the interior of the conductor hydraulic pipe of the strain clamp through the gap between the strands of the conductor, and then freezes. After the water freezes, the volume expands, which generates pressure on the inner wall of the conductor hydraulic pipe of the strain clamp, causing the "bulge" of the conductor hydraulic pipe. After the ice melts, a larger water storage space is left behind. Year after year, the "bulge" phenomenon becomes more and more serious, eventually leading to an accident. To solve the problem of the "bulge" of the conductor hydraulic pipe, the prior art "a new type of crimping strain clamp with a grease injection hole and an air vent hole" (publication number: CN218829008U) discloses a strain clamp. An injection hole and an air vent hole are formed on the conductor hydraulic pipe to facilitate the injection of conductive grease into the interior of the conductor hydraulic pipe and the filling of the cavity, thereby preventing rainwater from entering the interior of the conductor hydraulic pipe. However, the prior art still has the following technical problems:

[0004] The injection hole formed on the conductor hydraulic pipe of the prior art is formed in the radial direction of the conductor hydraulic pipe. When injecting the conductive grease, the conductive grease is injected from a direction perpendicular to the axis of the conductor hydraulic pipe, which is easily hindered by the internal conductor, making the injection not smooth. In particular, in the case of a long conductor hydraulic pipe, the injection speed is slow. The conductive grease may also accumulate at the mouth of the injection hole due to this hindering effect, causing the operator to mistakenly believe that the interior of the conductor hydraulic pipe has been filled, while the conductive grease cannot uniformly cover and fill the entire cavity in the interior of the conductor hydraulic pipe. Rainwater can easily flow into the conductor hydraulic pipe, making the rainwater prevention effect poor and unable to completely eliminate the problem of the "bulge" of the conductor hydraulic pipe. CONTENT OF THE UTILITY MODEL

[0005] The grease injection hole strain clamp provided by the utility model can solve the problem of slow injection of conductive grease and easy hindrance in the prior art, which causes the conductive grease to be unable to uniformly cover and fill the entire cavity in the interior of the conductor hydraulic pipe, resulting in low conductive grease injection efficiency and poor rainwater prevention effect.

[0006] The present application provides the following technical solutions: a grease injection hole strain clamp, comprising a conductor hydraulic pipe, a steel anchor fixed in the conductor hydraulic pipe, and a drainage hydraulic pipe fixed outside the conductor hydraulic pipe.

[0007] The grease injection unit is arranged on the wire hydraulic pipe, and the grease injection unit comprises an insert fixed on the wire hydraulic pipe.

[0008] Beneficial effects:

[0009] The smoothness and uniformity of the conductive grease injection are improved, and the injection efficiency and rainwater prevention effect are improved.

[0010] Further, the four inclined holes in the circular frustum section are arranged in a cross direction, and the arrangement direction of one pair of inclined holes is parallel to the central axis of the wire hydraulic pipe, and the arrangement direction of the other pair of inclined holes is perpendicular to the central axis of the wire hydraulic pipe.

[0011] Beneficial effects: The arrangement direction of the inclined hole is parallel to the central axis of the wire hydraulic pipe, so that when the conductive grease is injected into the cavity in the wire hydraulic pipe, the resistance of the conductive grease is reduced, and the conductive grease can be injected in two axial directions of the wire hydraulic pipe at the same time; and the arrangement direction of the other pair of inclined holes is perpendicular to the central axis of the wire hydraulic pipe, so that a part of the conductive grease can be injected along the circumference of the cavity in the wire hydraulic pipe, so as to achieve the effect that the conductive grease is injected in multiple directions along the axial and circumferential directions of the wire hydraulic pipe at the same time, improve the injection speed, and also make the conductive grease more uniformly distributed, and improve the rainproof effect.

[0012] Further, the end of the wire hydraulic pipe away from the grease injection unit is also provided with an exhaust unit, the exhaust unit comprises a blind hole arranged on the wall of the wire hydraulic pipe, a sleeve ring fixed in the blind hole, a plugging piece penetrating the middle of the sleeve ring, and a spring sleeved on the rod part of the plugging piece, the bottom of the blind hole is provided with a threaded hole, and one end of the plugging piece is a threaded end, which is connected in the threaded hole.

[0013] Beneficial effect: by unscrewing the plugging piece, the inside of the wire hydraulic pipe is communicated with the outside through the threaded through hole, so that the air in the wire hydraulic pipe is discharged when the conductive grease is added, and the conductive grease is more easily injected, and the overflow of the conductive grease through the threaded through hole can determine whether the wire hydraulic pipe is filled with the conductive grease.

[0014] Further, one end of the plugging piece away from the threaded end is provided with a large end, and the two ends of the spring are fixed between the large end and the collar, respectively.

[0015] Beneficial effect: by unscrewing the plugging piece, the threaded end of the plugging piece is away from the threaded through hole, and the spring can pull the plugging piece to hang on the wire hydraulic pipe, so that the plugging piece is prevented from falling after being unscrewed, and the plugging piece can be screwed into the threaded through hole after the conductive grease is added, so that the convenience of the conductive grease injection operation is improved.

[0016] Further, the middle hole on the cylindrical section is also screwed with a locking screw.

[0017] Beneficial effect: the screw can block the middle hole after the conductive grease is injected, prevent dust and rain from entering the inside of the wire hydraulic pipe, and avoid rusting of the steel core in the wire hydraulic pipe.

[0018] Further, the outer periphery of the wire hydraulic pipe is also fixed with a mounting sleeve, and the drainage hydraulic pipe is fixed below the mounting sleeve by mounting screws.

[0019] Beneficial effect: the drainage hydraulic pipe is used for fixing the drainage wire, so that the drainage wire can be connected to the wires on both sides of the tension pole tower, and the drainage wire can maintain a distance from the tower. The screw fixing mode facilitates maintenance and replacement of the drainage hydraulic pipe. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure front view of the utility model.

[0021] Figure 2 It is Figure 1 the enlarged view of the grease injection unit A in

[0022] Figure 3 It is Figure 2 the top view of the insert in

[0023] Figure 4 It is Figure 1 the enlarged view of the exhaust unit B in DETAILED DESCRIPTION

[0024] The following will be further described in detail through specific embodiments:

[0025] The markings in the accompanying drawings include: 1. Hydraulic conduit for guide wires; 2. Mounting sleeve; 3. Steel anchor; 4. Mounting screw; 5. Drainage hydraulic conduit; 6. Locking screw; 7. Cylindrical section; 701. Center hole; 702. Inclined hole; 8. Frustum section; 9. Collar; 10. Threaded end; 11. Blind hole; 12. Spring; 13. Large end; 14. Threaded through hole.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, the grease injection hole tension clamp includes a conductor hydraulic pipe 1, a steel anchor 3 fixed inside the conductor hydraulic pipe 1, an installation sleeve 2 fixed on the outer periphery of the conductor hydraulic pipe 1, and a drainage hydraulic pipe 5 fixed below the installation sleeve 2.

[0028] like Figures 1 to 3 As shown, a grease injection unit A is provided on the pipe wall above the hydraulic cable 1, such as... Figure 2 As shown, the grease injection unit includes an insert fixed to the hydraulic cable 1. The insert includes a cylindrical section 7 and a frustum section 8 integrally formed from top to bottom. The cylindrical section 7 is close to the outer wall of the hydraulic cable 1. A central hole 701 is axially formed in the middle of the cylindrical section 7, and a locking screw 6 is threaded onto the central hole 701. Multiple oblique holes 702 are evenly distributed along the generatrix direction inside the frustum section 8, and all oblique holes 702 communicate with the central hole 701. Figure 3 As shown, in this embodiment, four oblique holes 702 are provided in the frustum section 8, arranged in a cross shape. One pair of oblique holes 702 are arranged parallel to the central axis of the hydraulic guide tube 1, while the other pair is arranged perpendicular to the central axis of the hydraulic guide tube 1. The parallel arrangement of the oblique holes 702 to the central axis of the hydraulic guide tube 1 reduces the resistance of the conductive grease when it is injected into the cavity of the hydraulic guide tube 1, allowing the grease to be injected simultaneously along two axial directions of the hydraulic guide tube 1. The perpendicular arrangement of the other pair of oblique holes 702 to the central axis of the hydraulic guide tube 1 allows a portion of the conductive grease to be injected circumferentially along the internal cavity of the hydraulic guide tube 1, achieving the effect of simultaneous injection of conductive grease in multiple axial and circumferential directions of the hydraulic guide tube 1. This increases the injection speed and makes the conductive grease distribution more uniform.

[0029] like Figure 1 As shown, an venting unit B is provided at the end of the hydraulic cable 1 away from the grease injection unit A. In this embodiment, the venting unit B is located on the lower wall surface of the hydraulic cable 1. Figure 4As shown, the venting unit includes a blind hole 11 formed in the wall of the hydraulic cable 1, a collar 9 fixed in the blind hole 11, a sealing member passing through the middle of the collar 9, and a spring 12 sleeved on the rod of the sealing member. A threaded through hole 14 is provided at the bottom of the blind hole 11. The threaded through hole 14 connects the inner cavity of the hydraulic cable 1 to the outside of the hydraulic cable 1. One end of the sealing member is a threaded end 10, and the other end is a large end 13. The threaded end 10 is connected to the threaded through hole 14. The two ends of the spring 12 are respectively fixed between the large end 13 and the collar 9. By loosening the sealing member, the inside of the hydraulic cable 1 is connected to the outside of the hydraulic cable 1 through the threaded through hole 14. This facilitates the removal of air from the inside of the hydraulic cable 1 when adding conductive grease, making the injection of conductive grease easier. It also allows for easy determination of whether the hydraulic cable 1 is full of conductive grease by observing the amount of conductive grease overflowing from the threaded through hole 14. After the threaded end 10 of the plug leaves the threaded through hole 14, the spring 12 can pull the plug and hang it on the hydraulic tube 1 of the wire, which can prevent the plug from falling off after being loosened. After the conductive grease is added, the plug can be screwed back into the threaded through hole 14 to improve the convenience of the conductive grease injection operation.

[0030] The usage method of this structure is as follows:

[0031] During installation, the wires... Figure 1 The conductor passes through the hydraulic tube 1 from left to right. The steel core in the middle of the conductor passes through the right side of the hydraulic tube 1 and extends into the center hole of the straight section of the steel anchor 3. Then, a special crimping machine is used to crimp the straight section of the steel anchor 3 tightly to the steel core and extend the straight section of the steel anchor 3 into the hydraulic tube 1. The right side opening of the hydraulic tube 1 is then crimped with the crimping machine to fix the steel anchor 3 to the hydraulic tube 1. The left side of the hydraulic tube 1 is also crimped to fix the conductor extending into the hydraulic tube 1. The hydraulic tube 1 between the grease injection unit A and the venting unit B is not crimped, but the internal cavity of the hydraulic tube at this point is filled with conductive grease.

[0032] The conductive grease is filled by using an oil injection gun, the locking screw 6 is opened, the blocking piece is loosened, the threaded end 10 of the blocking piece is separated from the threaded hole 14, the internal cavity of the wire hydraulic pipe 1 is communicated with the outside, then the mouth of the oil injection gun is butted with the mouth of the middle hole 701, and the conductive grease is injected, the conductive grease is injected into the inclined hole 702 from the middle hole 701, and the inclined hole 702 is inclined, so that the conductive grease is injected in an inclined direction when entering the internal cavity of the wire hydraulic pipe 1, the resistance during injection of the conductive grease is reduced, the conductive grease is guided by the plurality of inclined holes 702, the conductive grease is injected in multiple directions along the axial direction and the circumferential direction of the wire hydraulic pipe 1 at the same time, the injection speed is improved, the conductive grease is more uniformly distributed, rainwater can be effectively prevented from entering the wire hydraulic pipe 1 from the gap between the wire strands at both ends of the wire hydraulic pipe 1, and rust of the steel core in the wire hydraulic pipe 1 is prevented. When it is found that a large amount of conductive grease is overflowed from the threaded hole 14, the injection is stopped, the threaded end 10 of the blocking piece is screwed into the threaded hole 14 again, finally the locking screw 6 is screwed in the middle hole 701, and the injection of the conductive grease is completed.

[0033] The above is only an embodiment of the utility model, the utility model is not limited to this embodiment case related field, and the specific structure and characteristics of the scheme known in the art and the like are not described too much herein. It should be pointed out that, for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, which should also be considered as the protection scope of the utility model, which will not affect the effect and practicality of the utility model. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A tension clamp with a grease inlet, comprising a conductor hydraulic tube, a steel anchor fixed inside the conductor hydraulic tube, and a drain hydraulic tube fixed outside the conductor hydraulic tube; characterized in that: The hydraulic tube for the wire is equipped with a grease injection unit. The grease injection unit includes an insert fixed on the hydraulic tube for the wire. The insert includes a cylindrical section and a frustum section integrally formed from top to bottom. The cylindrical section is close to the outer wall of the hydraulic tube for the wire. A central hole is axially opened in the middle of the cylindrical section. Multiple oblique holes are evenly distributed in the interior of the frustum section along the generatrix direction. All oblique holes are connected to the central hole.

2. The grease-filled tension clamp according to claim 1, characterized in that: The truncated cone section has four oblique holes arranged in a cross shape, with one pair of oblique holes arranged parallel to the central axis of the hydraulic guide tube and the other pair arranged perpendicular to the central axis of the hydraulic guide tube.

3. The grease-filled tension clamp according to claim 2, characterized in that: The end of the hydraulic tube away from the grease injection unit is also provided with an air venting unit. The air venting unit includes a blind hole opened in the wall of the hydraulic tube, a collar fixed in the blind hole, a plugging member passing through the middle of the collar, and a spring sleeved on the rod of the plugging member. The bottom of the blind hole is provided with a threaded through hole, and one end of the plugging member is a threaded end connected in the threaded through hole.

4. The grease-filled tension clamp according to claim 3, characterized in that: The sealing component has a large end at one end away from the threaded end, and the two ends of the spring are respectively fixed between the large end and the collar.

5. The grease-filled tension clamp according to claim 4, characterized in that: A locking screw is also threaded into the central hole on the cylindrical section.

6. The grease-filled tension clamp according to claim 5, characterized in that: The outer periphery of the hydraulic conduit is also fixed with an installation sleeve, and the drainage hydraulic conduit is fixed below the installation sleeve by installation screws.

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