CN210037980U

CN210037980U - Ground resistance tester

Info

Publication number: CN210037980U
Application number: CN201920705834.0U
Authority: CN
Inventors: 黄永兴
Original assignee: Shanghai Zhenyou Equipment Engineering Technology Co Ltd
Current assignee: Shanghai Zhenyou Equipment Engineering Technology Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-02-07
Anticipated expiration: 2029-05-16

Abstract

The utility model belongs to the technical field of the power equipment technique and specifically relates to a ground resistance tester is related to, including the instrument casing, the instrument casing is including dismantling the last lid and the lower box body of connection, is equipped with the instrument body and receives the line roller in the lower box body, connecting wire on the instrument body, and the wire twines on receiving the line roller, be equipped with reciprocal lead screw in the lower box body, reciprocal lead screw is parallel with receiving the line roller, and the both ends of reciprocal lead screw, the both ends of receiving the line roller all are equipped with the bearing frame, and the bearing frame is fixed in the lower box body. The utility model utilizes the synchronous belt pulley to lead the take-up roller and the multifilament bar to synchronously rotate, the nut seat reciprocates along the length direction of the reciprocating lead screw, and the lead is driven by the threading ring on the nut seat to reciprocate along the length direction of the take-up roller, thereby achieving the effect of uniformly winding the lead in the length direction of the take-up roller; through setting up the breakwater, avoid the rainwater to cause the influence to the instrument body, make this kind of ground resistance tester work steadily at sleet weather homoenergetic.

Description

Ground resistance tester

Technical Field

The utility model belongs to the technical field of the power equipment technique and specifically relates to a ground resistance tester is related to.

Background

According to the stipulations of transformer operation regulations: the grounding resistance of the grounding device is not more than 4 ohms; the total capacity of the transformer is 100 kilovolt-ampere or below, and the grounding resistance of the grounding device is not more than 10 ohms; the measurement of the grounding resistance enables the transformer to be installed as a completion and before commissioning as an important project for inspection and acceptance work.

The existing grounding resistance tester has two conducting wires for testing, namely a 20-meter voltage wire and a 40-meter current wire. In the process of actual test, two wires can be used only after being connected at the same time, the conventional test wires are pulled open or folded, generally, the test wires are pulled open by a tester in a splitting mode and then are connected to the rear side for use, and the test wires are also folded one by one when being taken up after being used. Because the length of the test wire is long, the pulling and the folding of the test wire consume much time, great inconvenience is brought to the test, and the working efficiency is reduced.

The utility model discloses a utility model patent that the bulletin number is CN206783024U discloses a ground resistance tester winder, when receiving the line, passes the spacing groove at roller middle part with the wire, winds to the pivot between the adjacent spacing dish in, drives the pivot through turning handle and rotates, twines to certain thickness in the pivot as the wire, forms the pencil dish, when conflicting the depression bar between the spacing dish, and the elasticity of spring makes the depression bar compress tightly the wire. The pressure of the pressure lever on the lead leads to lead the lead to be uniformly and tightly wound on the rotating shaft between the adjacent limiting disks, thus saving space and avoiding disorder; however, when the handle is rotated quickly, it is difficult for the operator to control the uniform winding of the wires in the length direction of the rotating shaft, which often leads to the wires being gathered and wound at a certain position on the rotating shaft, and finally the wires are wound into a huge wire harness coil and are not convenient to store.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ground resistance tester, it has the automatic wire of messenger and evenly twines advantage on receiving line roller length direction.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a ground resistance tester comprises an instrument shell, wherein the instrument shell comprises an upper cover body and a lower box body which are detachably connected, an instrument body and a wire collecting roller are arranged in the lower box body, a lead is connected to the instrument body and wound on the wire collecting roller, a reciprocating lead screw is arranged in the lower box body and is parallel to the wire collecting roller, bearing seats are arranged at two ends of the reciprocating lead screw and two ends of the wire collecting roller, the bearing seats are fixed in the lower box body, a first synchronizing wheel is coaxially fixed on the reciprocating lead screw, a second synchronizing wheel is coaxially fixed on the wire collecting roller, the first synchronizing wheel is connected with the second synchronizing wheel through a synchronous belt, a rotating handle is detachably connected at the end part of the wire collecting roller, an optical axis is fixed between the two bearing seats at two ends of the reciprocating lead screw and is parallel to the reciprocating lead screw, a nut seat is arranged on the reciprocating lead screw in a matched manner, the optical axis penetrates through the nut seat, a, the inner wall of the lower box body is provided with a threading hole for the lead to pass through.

By adopting the technical scheme, the upper cover body is opened, the rotating handle is installed at the end part of the wire take-up roller, the wire is wound by the rotating wire take-up roller, the reciprocating screw rod synchronously rotates with the wire take-up roller under the driving of the synchronous belt, the nut seat reciprocates along the length direction of the reciprocating screw rod under the limiting action of the optical axis, and the wire reciprocates along the length direction of the wire take-up roller under the driving of the threading ring, so that the wire is uniformly wound in the length direction of the wire take-up roller.

Preferably, a first chamber body, a second chamber body and a third chamber body are sequentially arranged in the lower box body along the length direction of the lower box body, the instrument body is arranged in the second chamber body, and wire take-up rollers are arranged on diagonal lines in the first chamber body and the third chamber body.

By adopting the technical scheme, the positive wire is wound by using the take-up roller in the first chamber body, and the negative wire is wound by using the take-up roller in the second chamber body; when the wire take-up roller is arranged along the diagonal line of the first chamber body and the third chamber body, the wire take-up roller is longest, and the length of a wire which can be wound is also longest.

Preferably, the side surface of the lower box body is provided with a notch, and the ends of the instrument body and the two wire take-up rollers are exposed at the notch.

By adopting the technical scheme, the lead can be conveniently connected to the instrument body at the notch, or the instrument body can be taken out from the lower box body; the rotating handle can be conveniently connected to the end part of the wire take-up roller.

Preferably, a door plate is arranged in the notch, the door plate is matched with the notch in shape, and the bottom of the door plate is hinged with the side face of the lower box body; the periphery of the upper cover body is provided with a covered edge, the covered edge is covered on the outer side of the periphery of the top of the lower box body, and the covered edge covers the threading hole and the top of the door plate.

By adopting the technical scheme, the gap is sealed by the door plate, and the door plate is locked and the threading hole is sealed by the covered edge around the upper cover body, so that the instrument body can be isolated from the outside, and the service life of the instrument body is prolonged.

Preferably, a partition plate is arranged between the first chamber body and the second chamber body and between the second chamber body and the third chamber body, a groove is formed in the top of the partition plate, and a grounding electrode is erected in the groove.

Through adopting above-mentioned technical scheme, can accomodate the earthing pole in box down with stablizing.

Preferably, a water baffle is fixed in the second chamber body, and the instrument body is positioned below the water baffle.

Through adopting above-mentioned technical scheme, the breakwater can avoid the rainwater to cause the influence to the instrument body, makes this kind of ground resistance tester can work steadily in sleet weather homoenergetic.

Preferably, a drawer sliding plate is arranged at the bottom in the second chamber, the instrument body is arranged on the drawer sliding plate, and a handle is arranged at one outward end of the drawer sliding plate.

Through adopting above-mentioned technical scheme, can pull out the second room body with the instrument body fast and laborsavingly, made things convenient for the maintenance to the instrument body to maintain.

Preferably, the second chamber is internally provided with a containing chamber, the rotating handle is arranged in the containing chamber, and the containing chamber is positioned above the water baffle.

Through adopting above-mentioned technical scheme, utilize space above the breakwater as the receiving room, make full use of the interior space of lower box.

To sum up, the utility model discloses a beneficial technological effect does:

1. the synchronous belt pulley is utilized to enable the take-up roller and the multi-filament bar to synchronously rotate, the nut seat reciprocates along the length direction of the reciprocating lead screw, and the lead wire reciprocates along the length direction of the take-up roller under the driving of the threading ring on the nut seat, so that the effect of uniformly winding the lead wire in the length direction of the take-up roller is achieved;

2. through setting up the breakwater, avoid the rainwater to cause the influence to the instrument body, make this kind of ground resistance tester work steadily at sleet weather homoenergetic.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a ground resistance tester;

FIG. 2 is a schematic view of the ground resistance tester after the door panel is opened;

FIG. 3 is a schematic structural view of FIG. 2 with the upper cover hidden;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a front view of the hidden door panel of FIG. 3.

In the figure, 1, an upper cover body; 1a, a first chamber body; 1b, a second chamber body; 1c, a third chamber body; 2. a lower box body; 3. an instrument body; 4. a reciprocating screw; 5. a wire take-up roller; 6. a bearing seat; 7. an optical axis; 8. a nut seat; 9. a threading ring; 10. threading holes; 11. a first synchronizing wheel; 12. a second synchronizing wheel; 13. a synchronous belt; 14. a notch; 15. a door panel; 16. edge covering; 17. a partition plate; 18. a groove; 19. a ground electrode; 20. a water baffle; 21. a drawer slide; 22. a handle; 23. a storage chamber; 24. the handle is rotated.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): fig. 1 is the utility model discloses a ground resistance tester, as shown in fig. 2, fig. 3, including the instrument casing, be equipped with instrument body 3 in the instrument casing, connecting wire on the instrument body 3 is equipped with through wires hole 10 on the instrument casing, and the instrument casing is worn out from through wires hole 10 to the wire, and during the test the wire be located one outside the instrument casing serve connect earthing pole 19 (see fig. 3) can.

As shown in fig. 2 and 3, the instrument case is composed of an upper cover 1 and a lower case 2, the lower case 2 is a rectangular parallelepiped case, an opening is formed in the top of the lower case 2, and the upper cover 1 covers the opening. The lower box body 2 is internally provided with a first chamber body 1a, a second chamber body 1b and a third chamber body 1c along the length direction in sequence, partition plates 17 are respectively arranged between the first chamber body 1a and the second chamber body 1b and between the second chamber body 1b and the third chamber body 1c, the tops of the two partition plates 17 are respectively provided with a groove 18, and the grooves 18 are used for accommodating a grounding electrode 19.

As shown in fig. 3, the apparatus body 3 is disposed in the second chamber 1b, a take-up roller 5 is disposed on each diagonal of the first chamber 1a and the third chamber 1c, the take-up roller 5 is located at a half height of the lower case 2, and the two take-up rollers 5 are symmetrical with respect to the second chamber 1 b. Winding the positive electrode lead by using a wire winding roller 5 in the first chamber body 1a, and winding the negative electrode lead by using a wire winding roller 5 in the second chamber body 1 b; when the take-up roller 5 is disposed along a diagonal line of the first chamber 1a and the third chamber 1c, the take-up roller 5 is longest and the length of the wire that can be wound is also longest.

As shown in fig. 3, a reciprocating lead screw 4 parallel to the take-up roller 5 is arranged at the top in the first chamber 1a, a nut seat 8 is screwed on the reciprocating lead screw 4, a threading ring 9 is fixed on the nut seat 8, bearing seats 6 are arranged at both ends of the reciprocating lead screw 4 and both ends of the take-up roller 5, and the bearing seats 6 are fixed on the inner wall of the lower box body 2. Two optical axes 7 are fixed between two bearing seats 6 of the reciprocating screw rod 4, the two optical axes 7 are symmetrical about the reciprocating screw rod 4, the optical axes 7 are parallel to the reciprocating screw rod 4, and the optical axes 7 penetrate through a nut seat 8.

As shown in fig. 4, a first synchronizing wheel 11 is coaxially fixed on the reciprocating screw rod 4 near the end, a second synchronizing wheel 12 is coaxially fixed on the wire take-up roller 5, the second synchronizing wheel 12 is located right below the first synchronizing wheel 11, and the first synchronizing wheel 11 is connected with the second synchronizing wheel 12 through a synchronizing belt 13.

As shown in fig. 3, a rectangular notch 14 is provided on the long side surface of the lower case 2, and the notch 14 exposes the side surface of the second chamber 1b and the end portions of the two take-up rolls 5. The end part of the wire take-up roller 5 is detachably connected with a rotating handle 24, and the rotating handle 24 can be inserted into the end part of the wire take-up roller 5 outside the lower box body 2. The end part of the wire take-up roller 5 is processed into a regular hexagonal prism shape, and the end part of the rotating handle 24 is provided with a slot which is in splicing fit with the end of the wire take-up roller 5. The lower box body 2 is provided with a threading hole 10 on the inner wall of the first chamber body 1a and the inner wall of the third chamber body 1c, and the structures in the first chamber body 1a and the third chamber body 1c are the same.

Referring to fig. 1 and 2, a door panel 15 is arranged in the gap 14, the door panel 15 is matched with the gap 14 in shape, and the bottom of the door panel 15 is hinged to the side face of the lower box body 2 through a hinge. An edge covering 16 is formed around the upper cover body 1, when the upper cover body 1 is connected with the lower box body 2, the edge covering 16 covers the outer side of the periphery of the top of the lower box body 2, and the edge covering 16 covers the threading hole 10 and the top of the door panel 15. The door plate 15 is used for sealing the gap 14, the door plate 15 is locked by the edge covering 16 around the upper cover body 1, and the threading hole 10 is sealed, so that the instrument body 3 can be isolated from the outside, and the service life of the instrument body 3 is prolonged.

Combine fig. 3 and fig. 5, follow supreme drawer slide 21, breakwater 20 of being equipped with in proper order down in the second room body 1b, on drawer slide 21 was arranged in to instrument body 3, draw drawer slide 21 can be fast and laborsaving pull out second room body 1b with instrument body 3, made things convenient for the maintenance to instrument body 3 to maintain, breakwater 20 can avoid the rainwater to cause the influence to instrument body 3, makes this kind of ground resistance tester can work steadily in sleet weather homoenergetic. The drawer sliding plate 21 is positioned at the bottom in the second chamber body 1b, two sides of the drawer sliding plate 21 are in sliding fit with two side walls of the second chamber body 1b, and a handle 22 is fixed at one outward end of the drawer sliding plate 21; the water baffle 20 is fixedly connected with the three side inner walls of the second chamber 1b, the instrument body 3 is positioned between the water baffle 20 and the drawer slide plate 21, and the distance between the water baffle 20 and the drawer slide plate 21 is equal to the height of the instrument body 3. The water guard plate 20 is spaced from the top of the second chamber 1b, and a space above the water guard plate 20 in the second chamber 1b is used as a storage chamber 23 for storing a rotating handle 24 and other sundries.

The implementation principle of the embodiment is as follows: the upper cover body 1 is opened, the rotating handle 24 is installed at the end portion of the wire take-up roller 5, the wire is wound by the rotating wire take-up roller 5, the reciprocating lead screw 4 rotates synchronously with the wire take-up roller 5 under the driving of the synchronous belt 13, the nut seat 8 reciprocates along the length direction of the reciprocating lead screw 4 under the limiting action of the optical axis 7, and the wire reciprocates along the length direction of the wire take-up roller 5 under the driving of the threading ring 9, so that the wire is uniformly wound in the length direction of the wire take-up roller 5.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a ground resistance tester, includes the instrument casing, the instrument casing is equipped with instrument body (3) and receipts line roller (5) including last lid (1) and lower box body (2) that can dismantle the connection in lower box body (2), and connecting wire is gone up in instrument body (3), and the wire twines on receipts line roller (5), its characterized in that: a reciprocating lead screw (4) is arranged in the lower box body (2), the reciprocating lead screw (4) is parallel to the wire collecting roller (5), bearing seats (6) are arranged at two ends of the reciprocating lead screw (4) and two ends of the wire collecting roller (5), the bearing seats (6) are fixed in the lower box body (2), a first synchronous wheel (11) is coaxially fixed on the reciprocating lead screw (4), a second synchronous wheel (12) is coaxially fixed on the wire collecting roller (5), the first synchronous wheel (11) is connected with the second synchronous wheel (12) through a synchronous belt (13), a rotating handle (24) is detachably connected at the end part of the wire collecting roller (5), an optical axis (7) is fixed between the two bearing seats (6) at two ends of the reciprocating lead screw (4), the optical axis (7) is parallel to the reciprocating lead screw (4), a nut seat (8) is matched with the reciprocating lead screw (4), the optical axis (7) passes through the nut seat (8), and a threading ring (9) for a lead wire to pass through is fixed on, the inner wall of the lower box body (2) is provided with a threading hole (10) for the lead to pass through.

2. The earth resistance tester of claim 1, wherein: the instrument box is characterized in that a first chamber body (1 a), a second chamber body (1 b) and a third chamber body (1 c) are sequentially arranged in the lower box body (2) along the length direction of the lower box body, the instrument body (3) is arranged in the second chamber body (1 b), and wire take-up rollers (5) are arranged on diagonal lines in the first chamber body (1 a) and the third chamber body (1 c).

3. A ground resistance tester as claimed in claim 2 wherein: a notch (14) is formed in the side face of the lower box body (2), and the ends of the instrument body (3) and the two wire take-up rollers (5) are exposed out of the notch (14).

4. A ground resistance tester as claimed in claim 3 wherein: a door plate (15) is arranged in the notch (14), the door plate (15) is matched with the notch (14) in shape, and the bottom of the door plate (15) is hinged with the side face of the lower box body (2); an edge covering (16) is arranged around the upper cover body (1), the edge covering (16) is covered on the outer side of the periphery of the top of the lower box body (2), and the edge covering (16) covers the threading hole (10) and the top of the door panel (15).

5. A ground resistance tester as claimed in claim 2 wherein: partition plates (17) are respectively arranged between the first chamber body (1 a) and the second chamber body (1 b) and between the second chamber body (1 b) and the third chamber body (1 c), a groove (18) is formed in the top of each partition plate (17), and a grounding electrode (19) is erected in each groove (18).

6. A ground resistance tester as claimed in claim 2 wherein: a water baffle (20) is fixed in the second chamber body (1 b), and the instrument body (3) is positioned below the water baffle (20).

7. A ground resistance tester as claimed in claim 2 wherein: the bottom in the second chamber body (1 b) is provided with a drawer sliding plate (21), the instrument body (3) is arranged on the drawer sliding plate (21), and one outward end of the drawer sliding plate (21) is provided with a handle (22).

8. A ground resistance tester as claimed in claim 2 wherein: a containing chamber (23) is arranged in the second chamber body (1 b), a rotating handle (24) is arranged in the containing chamber (23), and the containing chamber (23) is positioned above the water baffle (20).