Auxiliary mechanism for measuring ground resistance

Abstract

The present invention belongs to the technical field of power transmission line equipment, and discloses an auxiliary mechanism for measuring ground resistance. Bolts pass through pole towers, drain plates and nuts in sequence. The auxiliary mechanism for measuring ground resistance includes an insulating sleeve and a limiter. The middle part of the insulating sleeve is movably connected so that the insulating sleeve can be sleeved on the bolt to separate the drain plate from the bolt. Two limiters are provided, and the two limiters are respectively arranged at the two ends of the insulating sleeve along the axial direction of the bolt. The middle part of the limiter is movably connected and can be sleeved on the bolt. The limiter is provided with a bending part so that the limiter can be bent in the direction away from the bolt along the radial direction of the bolt to separate the drain plate from the pole tower and the nut. The limiter is made of insulating material. The auxiliary mechanism for measuring ground resistance provided by the present invention can stably keep the drain plate and the pole tower insulated, so as to realize the ground resistance measurement on the basis of not completely disassembling the grounding down conductor.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission line equipment, and in particular to an auxiliary mechanism for measuring ground resistance. Background Art

[0002] The pole towers in the transmission line are used to erect the transmission lines. Since the pole towers are usually high, grounding devices are installed on the pole towers to ensure safety, so as to avoid faults caused by lightning strikes and the like. The grounding device includes a grounding electrode installed underground and a grounding down conductor used to connect the pole tower and the grounding electrode. The resistance encountered when the current enters the earth through the grounding electrode and spreads to the surrounding is the grounding resistance. The grounding effect can be reflected by the resistance value of the grounding resistance. Therefore, it is necessary to measure the grounding resistance to ensure the grounding effect and ensure the stable operation of the transmission line.

[0003] During the measurement of grounding resistance, the drainage plate connected to the grounding down conductor needs to be removed from the tower to maintain insulation between the tower and the grounding device. However, during the installation and removal of the grounding down conductor bolts, some towers do not have sufficient length for the grounding down conductor, which makes it difficult or impossible to reinstall the bolts after the grounding down conductor bolts are removed. In addition, the tension of the grounding down conductor of some towers is too large, which makes it easy for the grounding down conductor to pop out and injure people after the grounding down conductor bolts are removed.

[0004] In the prior art, an insulating column connected with bolts is provided to move the drain plate onto the insulating column to achieve insulation between the drain plate and the tower. However, due to the mobility of the drain plate on the insulating column, the stability of the drain plate is poor, and it is easy to move, causing the drain plate to be connected to the tower, which is not easy to ensure safety; and due to the length limit of the grounding down conductor, the drain plate may not be easy to move onto the insulating column, thereby affecting the measurement of the grounding resistance. Summary of the invention

[0005] The object of the present invention is to provide an auxiliary mechanism for measuring grounding resistance, which can stably keep the insulation between the guide plate and the pole tower, so as to realize the grounding resistance measurement on the basis of not completely disassembling the grounding down conductor.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An auxiliary mechanism for measuring ground resistance, wherein a bolt passes through a pole tower, a guide plate and a nut in sequence, comprising:

[0008] An insulating sleeve, wherein the middle portion of the insulating sleeve is movably connected so that the insulating sleeve can be sleeved on the bolt to separate the guide plate and the bolt;

[0009] A limit piece, two of which are respectively arranged at the two ends of the insulating sleeve along the axial direction of the bolt, the middle part of the limit piece is movably connected and can be sleeved on the bolt, the limit piece is provided with a bending portion so that the limit piece can be bent along the radial direction of the bolt in a direction away from the bolt to space the guide plate from the pole tower and the nut, and the limit piece is made of insulating material.

[0010] Optionally, a fixing member is further included, the bending portion is arranged at the middle part of the limiting member, the fixing member includes a first fixing member and a second fixing member, the first fixing member is arranged on the insulating sleeve or the limiting member at one end close to the insulating sleeve, and the second fixing member is arranged at the end of the limiting member away from the insulating sleeve, after the bending portion is bent, the first fixing member can cooperate with the second fixing member to fix the limiting member.

[0011] Optionally, the bending portion is arranged at 1 / 2 of the length of the limiting member along the axis direction of the bolt.

[0012] Optionally, the fixing member is a magnet.

[0013] Optionally, the fixing member is arranged on a side of the insulating sleeve and the limiting member close to the bolt.

[0014] Optionally, a plurality of the fixing members are provided, and the plurality of the fixing members are evenly distributed along the circumference of the bolt.

[0015] Optionally, a fixing ring is provided at one end of the limiting member away from the insulating sleeve, the second fixing member is provided on the fixing ring, and the fixing ring can abut against the end of the insulating sleeve.

[0016] Optionally, the insulating sleeve, the limiting member and the fixing ring are all made of ABS resin.

[0017] Optionally, the limiting member includes a plurality of limiting grids, and the plurality of limiting grids are arranged at intervals.

[0018] Optionally, the limiting member is telescopically connected to both ends of the insulating sleeve.

[0019] Beneficial effects:

[0020] The auxiliary mechanism for measuring ground resistance provided by the present invention, when it is necessary to measure the ground resistance, loosen the nut so that the drain plate can move on the bolt, and by providing an insulating sleeve that can be sleeved on the bolt, the connection hole opened on the drain plate is spaced from the bolt, so that the drain plate and the bolt are insulated; limiters made of insulating material are provided at both ends of the insulating sleeve, and after the insulating sleeve is sleeved on the bolt, the limiters are bent in the radial direction of the bolt in the direction away from the bolt, so that the limiter can keep the surface of the drain plate insulated from the pole tower and the nut, and avoid contact and electrification with the pole tower or the nut due to the movement of the drain plate on the bolt. The auxiliary mechanism for measuring ground resistance provided by the present invention can stably keep the drain plate and the pole tower insulated, so as to realize the ground resistance measurement on the basis of not completely disassembling the grounding down conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the auxiliary mechanism for measuring ground resistance provided by the first embodiment of the present invention when in use;

[0022] Figure 2 is a schematic diagram of the auxiliary mechanism for measuring ground resistance provided by the first embodiment of the present invention when it is opened;

[0023] Figure 3 is a schematic diagram of the auxiliary mechanism for measuring ground resistance provided by the first embodiment of the present invention when it is closed;

[0024] Figure 4 is a schematic diagram of the auxiliary mechanism for measuring ground resistance provided by the first embodiment of the present invention when it starts to bend;

[0025] Figure 5 It is a schematic diagram of the auxiliary mechanism for ground resistance measurement provided in the first embodiment of the present invention after bending.

[0026] In the figure:

[0027] 1. Insulating sleeve; 11. Curved surface;

[0028] 2. Limiting member; 21. Bending portion; 22. Fixing ring; 23. Limiting grid plate;

[0029] 3. Fixing member; 31. First fixing member; 32. Second fixing member;

[0030] 4. Bolts; 5. Nuts; 6. Drainage plate; 7. Grounding down conductor; 8. Pole tower. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Embodiment 1

[0036] The present invention provides an auxiliary mechanism for measuring ground resistance (hereinafter referred to as "auxiliary mechanism"), such as Figure 1 As shown, the bolt 4 passes through the pole tower 8, the drain plate 6 and the nut 5 in sequence to fix the drain plate 6 on the pole tower 8. At this time, the pole tower 8, the bolt 4, the drain plate 6 and the nut 5 are all in a conductive state. The grounding protection of the pole tower 8 is achieved through the grounding down conductor 7 connected to the drain plate 6. When it is necessary to measure the grounding resistance, the auxiliary mechanism is sleeved on the bolt 4 so that the auxiliary mechanism is located between the connection hole wall of the drain plate 6 and the bolt 4, thereby separating the drain plate 6 from the bolt 4, so that the drain plate 6 and the pole tower 8, the bolt 4 and the nut 5 are all insulated.

[0037] like Figure 1-Figure 5 As shown, the auxiliary mechanism includes an insulating sleeve 1 and a limiting member 2. The middle part of the insulating sleeve 1 is movably connected so that the insulating sleeve 1 can be sleeved on the bolt 4 to separate the guide plate 6 from the bolt 4. Two limiting members 2 are provided, and the two limiting members 2 are respectively provided at the two ends of the insulating sleeve 1 along the axial direction of the bolt 4. The middle part of the limiting member 2 is movably connected and can be sleeved on the bolt 4. The limiting member 2 is provided with a bending portion 21, so that the limiting member 2 can be bent along the radial direction of the bolt 4 in a direction away from the bolt 4 to separate the guide plate 6 from the tower 8 and the nut 5. The limiting member 2 is made of insulating material.

[0038] The insulating sleeve 1 includes two arcuate surfaces 11, which can cooperate to form a hollow annular sleeve to be sleeved on the bolt 4. A connecting structure is provided in the middle of the insulating sleeve 1 along the axial direction of the bolt 4, so that the two arcuate surfaces 11 can achieve two states of closing and opening. Preferably, the connecting structure can be a connecting shaft or a connecting surface made of a soft material, which can make the two arcuate surfaces 11 rotate relative to each other and have insulating properties. It can be understood that the thickness of the auxiliary mechanism is small so that it can enter the gap between the connecting hole of the guide plate 6 and the bolt 4.

[0039] The setting of the limiter 2 is used to protect the surface of the drain plate 6 to prevent the drain plate 6 from accidentally touching the tower 8 or the nut 5 when it moves on the bolt 4 after loosening the nut 5, causing the drain plate 6 to be conductive and affecting the ground resistance measurement. After the limiter 2 is bent, a structure along the radial direction of the bolt 4 can be formed at both ends of the insulating sleeve 1. After the ground resistance measurement is completed, the limiter 2 can be reset to remove the auxiliary mechanism. Preferably, the setting position of the bent portion 21 can be at any position of the limiter 2 along the axial direction of the bolt 4, which can separate the surface of the drain plate 6 from the tower 8 and the nut 5. The middle part of the limiter 2 can be connected by the same connection method as the insulating member 1, or it can be different, as long as it can realize the function of being sleeved on the bolt 4.

[0040] When it is necessary to measure the grounding resistance, first loosen the nut 5, and screw the nut 5 to the end of the bolt 4 so that the drain plate 6 can move on the bolt 4; the connecting hole opened on the drain plate 6 is separated from the bolt 4 by the insulating sleeve 1, so that the drain plate 6 and the bolt 4 are insulated; after the insulating sleeve 1 is put on the bolt 4, the end of the limiter 2 is pressed to bend the bending part 21 along the radial direction of the bolt 4 in the direction away from the bolt 4, so that the surface of the drain plate 6 and the tower 8 and the nut 5 are insulated, so that the grounding resistance can be measured. The auxiliary mechanism can stably keep the drain plate 6 and the tower 8 insulated, so as to realize the grounding resistance measurement on the basis of not completely disassembling the grounding down conductor 7 and the drain plate 6 at its end, which improves the safety when measuring the grounding resistance, and also facilitates the reinstallation of the drain plate 6, improves the work efficiency, and reduces the difficulty of operation for the operator.

[0041] Optionally, the limiting member 2 includes a plurality of limiting grid plates 23 , and the plurality of limiting grid plates 23 are arranged at intervals.

[0042] The limiting grid plate 23 is arranged along the axial direction of the bolt 4. The limiting grid plates 23 arranged at intervals can effectively avoid the problem of the diameter of the circle formed by the end of the limiting member 2 away from the insulating member 1 becoming larger due to the bending of the limiting member 2. It can be understood that the limiting member 2 can also be made of a softer material, or partially made of a softer material, so as to be able to bend.

[0043] Optionally, the insulating sleeve 1, the limiting member 2 and the fixing ring 22 are all made of ABS resin to play an insulating role. The middle part of the insulating sleeve 1 and the middle part of the limiting member 2 can be connected with ABS resin to achieve relative rotation and cooperate with the bolt 4. After the insulating sleeve 1 and the limiting member 2 are sleeved on the bolt 4 and closed, the auxiliary mechanism is moved to the gap between the drain plate 6 and the bolt 4. Due to the limiting effect of the connecting hole of the drain plate 6, the insulating sleeve 1 will not open automatically, and the limiting member 2 will not open automatically, thereby ensuring the stability of the insulating isolation drain plate 6. When the auxiliary mechanism needs to be removed, the limiting member 2 can be reset by pressing the bending portion 21 and moved along the axial direction of the bolt 4 so that the auxiliary mechanism can be removed.

[0044] Optionally, continue to refer to Figure 1-Figure 5 The auxiliary mechanism also includes a fixing member 3, a bending portion 21 is arranged in the middle of the limiting member 2, the fixing member 3 includes a first fixing member 31 and a second fixing member 32, the first fixing member 31 is arranged on the insulating sleeve 1 or the limiting member 2 at one end close to the insulating sleeve 1, and the second fixing member 32 is arranged at the end of the limiting member 2 away from the insulating sleeve 1. After the bending portion 21 is bent, the first fixing member 31 and the second fixing member 32 cooperate to fix the limiting member 2.

[0045] When in use, the bending portion 21 is bent by pressing the end of the limiter 2 away from the insulating member 1, so that the two ends of the limiter 2 can contact each other. Through the cooperation of the first fixing member 31 and the second fixing member 32, the limiter 2 can maintain the state of being bent after being pressed. The first fixing member 31 and the second fixing member 32 can be fixed by means of snap connection or the like. Preferably, the first fixing member 31 is arranged at one end of the limiter 2 close to the insulating sleeve 1, and can be at the end or at a position between the end and the bending portion 21, so as to achieve the insulation isolation effect on the surface of the guide plate 6. The bending portion 21 can be a bending line pre-arranged on the limiter 2, so that the limiter 2 bends at the bending portion 21 when subjected to pressure.

[0046] Optionally, the bending portion 21 is arranged at 1 / 2 of the length of the limiting member 2 along the axial direction of the bolt 4 , so that when the end of the limiting member 2 is pressed, both ends of the limiting member 2 can contact and be fixed by the fixing member 3 .

[0047] Optionally, the fixing member 3 is a magnet, and the fixing member 3 fixes the bent limiting member 2 by magnetic adsorption.

[0048] Optionally, the fixing member 3 is arranged on a side of the insulating sleeve 1 and the limiting member 2 close to the bolt 4 .

[0049] In order to avoid accidental conduction due to the fixture 3 being made of a conductive material such as a magnet, the fixture 3 is arranged on a side of the auxiliary mechanism close to the bolt 4 and does not penetrate the auxiliary mechanism to prevent the fixture 3 from playing a conductive role.

[0050] Optionally, a plurality of fixing members 3 are provided, and the plurality of fixing members 3 are evenly distributed along the circumference of the bolt 4 to achieve a better fixing effect of the fixing members 3 .

[0051] Optionally, a fixing ring 22 is provided at one end of the limiting member 2 away from the insulating sleeve 1 , and the second fixing member 32 is provided on the fixing ring 22 , and the fixing ring 22 can abut against the end of the insulating sleeve 1 .

[0052] The fixing ring 22 is in a semicircular shape, and can make it more convenient to press the limiter 2 . The fixing ring 22 abuts against the end of the insulating sleeve 1 , and it is easier to fix the limiter 2 after bending through the fixing member 3 .

[0053] Embodiment 2

[0054] This embodiment provides an auxiliary mechanism for measuring ground resistance, which is basically the same as the auxiliary mechanism for measuring ground resistance in the first embodiment, except that the connection method between the limiter 2 and the insulating sleeve 1 is different.

[0055] In this embodiment, the stopper 2 is telescopically connected to both ends of the insulating sleeve 1, and the stopper 2 can be selectively extended or retracted into the insulating sleeve 1. When in use, the stopper 2 can be retracted into the insulating sleeve 1 first, so that the insulating sleeve 1 can be sleeved between the connection hole of the guide plate 6 and the bolt 4. After the insulating sleeve 1 is located at the preset position, the stopper 2 is pulled out, and the guide plate 6 is insulated and isolated by bending the bending portion 21. The telescopic stopper 2 is easy to be sleeved on the bolt 4, and at the same time, it can also be easily stored when not in use.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An auxiliary mechanism for measuring ground resistance, wherein a bolt (4) passes through a pole tower (8), a guide plate (6) and a nut (5) in sequence, and is characterized in that: include: An insulating sleeve (1), the middle portion of the insulating sleeve (1) being movably connected so that the insulating sleeve (1) can be sleeved on the bolt (4) to separate the guide plate (6) and the bolt (4); a limiting member (2), wherein two limiting members (2) are provided, and the two limiting members (2) are respectively provided at two ends of the insulating sleeve (1) along the axial direction of the bolt (4); the middle part of the limiting member (2) is movably connected and can be sleeved on the bolt (4); the limiting member (2) is provided with a bending portion (21) so that the limiting member (2) can be bent along the radial direction of the bolt (4) in a direction away from the bolt (4) to space the guide plate (6) from the pole tower (8) and the nut (5); the limiting member (2) is made of insulating material; The invention also comprises a fixing member (3), wherein the bent portion (21) is arranged at the middle part of the limiting member (2), and the fixing member (3) comprises a first fixing member (31) and a second fixing member (32), wherein the first fixing member (31) is arranged at an end of the insulating sleeve (1) or the limiting member (2) close to the insulating sleeve (1), and the second fixing member (32) is arranged at an end of the limiting member (2) away from the insulating sleeve (1), and after the bent portion (21) is bent, the first fixing member (31) can cooperate with the second fixing member (32) to fix the limiting member (2); The bent portion (21) is arranged at 1 / 2 of the length of the limiting member (2) along the axial direction of the bolt (4); A fixing ring (22) is provided at one end of the limiting member (2) away from the insulating sleeve (1), the second fixing member (32) is provided on the fixing ring (22), and the fixing ring (22) can abut against an end of the insulating sleeve (1).

2. The auxiliary mechanism for measuring ground resistance according to claim 1, characterized in that: The fixing member (3) is a magnet.

3. The auxiliary mechanism for measuring ground resistance according to claim 2, characterized in that: The fixing member (3) is arranged on a side of the insulating sleeve (1) and the limiting member (2) close to the bolt (4).

4. The auxiliary mechanism for measuring ground resistance according to claim 1, characterized in that: A plurality of the fixing members (3) are provided, and the plurality of the fixing members (3) are evenly distributed along the circumference of the bolt (4).

5. The auxiliary mechanism for measuring ground resistance according to claim 1, characterized in that: The insulating sleeve (1), the limiting member (2) and the fixing ring (22) are all made of ABS resin.

6. The auxiliary mechanism for measuring ground resistance according to claim 1, characterized in that: The limiting member (2) comprises a plurality of limiting grid plates (23), and the plurality of limiting grid plates (23) are arranged at intervals.

7. The auxiliary mechanism for measuring ground resistance according to claim 1, characterized in that: The limiting member (2) is telescopically connected to two ends of the insulating sleeve (1).

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