CN207675079U - A kind of 35kV switch cabinet contacts silver coating thickness measure special fixture - Google Patents

Abstract

The utility model discloses a special fixture for measuring the thickness of the silver-plated layer of a 35kV switch cabinet contact, which comprises a fixing seat, a first guiding column, a second guiding column, a pressing block, a spring seat, a first elastic element and a second elastic element, Wherein, the fixed seat is provided with a U-shaped groove, the first side groove wall of the U-shaped groove is the positioning reference plane of the contact finger to be tested, and the first guide column and the second guide column can be freely slidably arranged on the On the second side groove wall of the U-shaped groove, the pressing block is fixedly connected with the first guide column and the second guide column, and has a movement tendency to compress the contact finger relative to the positioning reference plane, wherein, The depth of the U-shaped groove satisfies that: the conductive contact portion of the contact finger to be tested protrudes from the top surface of the fixing seat. When the contact finger is inserted into the gap between the pressing block and the positioning reference surface, the pressing block can elastically float and automatically press the contact finger to the positioning reference surface, so that it can adapt to the contact fingers of various size parameters, and the contact finger insertion Fast installation and operation.

Description

A special fixture for measuring the thickness of the silver-plated layer of 35kV switch cabinet contacts

technical field

The utility model relates to the field of electric equipment maintenance, in particular to a special fixture for measuring the thickness of the silver plating layer of a 35kV switch cabinet contact.

Background technique

In the 35kV switchgear, when the power isolating switch is in the off position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; A switching device for current flow under conditions such as a short circuit. In order to prevent oxidation of plum blossom contacts and improve wear resistance and corrosion resistance, silver plating process is generally adopted on the basic part of contact fingers of isolating switch.

During frequent opening and closing operations, and under the influence of the atmospheric environment, the silver plating of the contacts is worn, corroded, and the thickness becomes smaller. Therefore, it is necessary to regularly measure the silver plating of the contact finger of the disconnector.

At present, the methods for measuring the thickness of the silver-plated layer of the contact finger of the isolating switch include on-site testing with a hand-held X-ray fluorescent alloy analyzer and testing with a desktop coating thickness gauge. On-site use of a hand-held X-ray fluorescence alloy analyzer has large measurement errors, and X-ray exposure is harmful to the human body. Therefore, more desktop coating thickness gauges are used for testing.

When measuring the thickness of the desktop silver plating layer, the contact finger of the isolating switch needs to be fixed to ensure that the surface to be tested is kept level. At present, plasticine, sponge, etc. are commonly used, which are easy to contaminate the test and the instrument, resulting in measurement errors. Accurate measurement of silver layer thickness has serious implications.

For this reason, it is very necessary to provide a special fixture for measuring the thickness of the silver-plated layer of the contact finger of the isolating switch.

Utility model content

The purpose of the utility model is to provide a special fixture for measuring the thickness of the silver-plated layer of the contact of a 35kV switchgear to solve the problem of inaccurate measurement of the silver-plated layer of the switchgear.

To this end, the utility model provides a special fixture for measuring the thickness of the silver-plated layer of a 35kV switch cabinet contact, including a fixed seat, a first guide column, a second guide column, a pressure block, a spring seat, a first elastic element and a second The elastic element, wherein the fixing base is provided with a U-shaped groove, the first side groove wall of the U-shaped groove is the positioning reference plane of the contact finger to be tested, and the first guide post and the second guide post can slide freely is arranged on the second side groove wall of the U-shaped groove, and the pressing block is fixedly connected with the first guide column and the second guide column, and has a movement tendency of pressing the contact finger relative to the positioning reference plane , wherein the depth of the U-shaped groove satisfies that: the conductive contact portion of the contact finger to be tested protrudes from the top surface of the fixing base.

Further, the U-shaped groove is 10 cm long, 6 cm wide, and 3 cm high.

Further, finger grooves are provided on the first side groove wall of the U-shaped groove.

Further, the above-mentioned first elastic element is sheathed on the first guide post, one end of the first elastic element abuts against the spring seat, and the other end abuts and fits with the positioning shoulder on the first guide post.

Further, the above-mentioned second elastic element is sheathed on the second guide column, one end of the second elastic element abuts against the spring seat, and the other end abuts and fits with the positioning shoulder on the second guide column.

Further, the above-mentioned special fixture for measuring the thickness of the silver-plated layer of the 35kV switch cabinet contacts also includes a handle, wherein the handle is fixedly connected to the first guide post and the second guide post.

According to the special fixture of the utility model, the contact finger positioning reference plane for positioning the contact is provided on the fixing seat, and is pressed by an elastic floating pressure block, and the conductive contact part of the contact finger to be tested protrudes from the top of the fixing seat. On the surface, it is so convenient for the desktop silver coating thickness gauge to measure the thickness of the silver coating layer, which overcomes the problems of commonly used plasticine, sponge and other pollution tests and instruments, and causes measurement errors, and solves the problem of switch cabinet contact during the maintenance of power equipment. The problem of inaccurate measurement of the silver plating layer of the head.

In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. Below with reference to figure, the utility model is described in further detail.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic structural view of a special fixture for measuring the thickness of the silver-plated layer of a 35kV switch cabinet contact according to the first embodiment of the present invention;

Fig. 2 is a schematic side view of a special fixture for measuring the thickness of the silver-plated layer of a 35kV switch cabinet contact according to the second embodiment of the present invention; and

Fig. 3 is a schematic structural view of the special fixture for measuring the thickness of the silver-plated layer shown in Fig. 2; and

Fig. 4 is a schematic structural diagram of a special fixture for measuring the thickness of the silver-plated layer of a 35kV switch cabinet contact according to the third embodiment of the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIG. 1 , the special jig for silver plating layer measurement of the first embodiment includes a fixing seat 101 , a first fastening bolt 103 , and a second fastening bolt 104 .

Among them, the fixed seat 101 is made of Q235 steel, and the fixed seat 101 is provided with a U-shaped groove 102. The U-shaped groove is 10 cm long, 6 cm wide, and 3 cm high. This structure can meet the finger size of most plum blossom contacts. parameters, and convenient assembly and disassembly operations.

Wherein, the groove wall of the fixed seat 101 facing the fastening bolt is used as a positioning reference plane 105, one side of the contact finger of the plum blossom contact is in contact with the contact positioning reference plane, and the other side is formed by the first fastening bolt 103 and the second fastening bolt 103. Two fastening bolts 104 are top-tightened.

Preferably, the first fastening bolts 103 and the second fastening bolts 104 are located at the midline of the groove wall on the same side of the U-shaped groove 102 and arranged side by side.

The contact portion with the silver-plated layer of the stylus exposes the top surface of the fixing seat 101 , and then the thickness of the silver-plated layer is measured by a desktop silver-plated layer thickness gauge. In this way, it avoids the commonly used plasticine, sponge and other pollution tests and instruments, causing measurement errors and other problems, and solves the problem of inaccurate measurement of the silver-plated layer of switch cabinet contacts in the maintenance of electrical equipment.

As shown in Fig. 2 and Fig. 3, the silver-plated layer measurement special fixture of the second embodiment includes a fixed seat 201, a first guide column 202, a second guide column 203, a pressing block 204, a spring seat 205, and a first elastic element 206 and the second elastic element 207 .

The fixing seat 201 is provided with a U-shaped groove 210, and the groove wall of the U-shaped groove 210 facing the pressing block 204 is a positioning reference plane 209, and the gap between the positioning reference plane 209 and the pressing block 204 is used for inserting contact fingers. 211. At the same time, the conductive contact portion 212 of the contact finger 211 protrudes from the top surface of the fixing seat 201 .

Wherein, the first guide column 202 is provided with a positioning shoulder 208 , and the positioning shoulder 208 is used to limit the stroke of the first guide column 202 . The structure of the second guide post 203 is the same as that of the first guide post 202, the two are arranged side by side, and the pressure block 204 is fixedly connected with the first guide post 202 and the second guide post 203, parallel to the positioning reference plane 209, relative to the positioning reference plane Can be translated to accommodate fingers of different thicknesses.

The spring seat 205 is fixedly connected with the fixed seat 201 , one end of the first elastic element 206 abuts on the spring seat 205 , and the other end abuts against the positioning shoulder 208 . The second elastic element 207 is sheathed on the second guide column, and its installation method is the same as that of the first elastic element.

In this embodiment, the pressure block, the first guide column, the second guide column, the first elastic element and the second elastic element constitute an elastic floating mechanism, when the contact finger is inserted into the gap between the pressure block and the positioning reference surface , Automatically compress the contact fingers to the positioning reference surface, can adapt to contact fingers of different thicknesses, and the operation of inserting and inserting the contacts is quick.

Preferably, a finger groove 213 is formed on the groove wall on the side where the positioning reference plane of the positioning seat is located, so as to facilitate the withdrawing operation of the contact finger.

As shown in Figure 4, compared with the second embodiment, the silver plating layer measurement special fixture of the third embodiment also includes a handle 214, which is connected with the first guide post 202 and the second guide post 203, and is used for installing When touching the finger, pull the pressing block away from the positioning reference plane, so as to facilitate the installation or withdrawal operation of the thick contact finger in the positioning groove.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. A special fixture for measuring the thickness of the silver-plated layer of a 35kV switch cabinet, characterized in that it includes a fixing seat, a first guide column, a second guide column, a pressure block, a spring seat, a first elastic element, and a second elastic element , wherein, the fixed base is provided with a U-shaped groove, the first side groove wall of the U-shaped groove is the positioning reference plane of the contact finger to be tested, and the first guide column and the second guide column can be freely slidably set On the second side groove wall of the U-shaped groove, the pressing block is fixedly connected with the first guide column and the second guide column, and has a movement tendency to compress the contact finger relative to the positioning reference plane, wherein , the depth of the U-shaped groove satisfies that: the conductive contact portion of the contact finger to be tested protrudes from the top surface of the fixing base. 2. The special fixture for measuring the thickness of the silver-plated layer of the 35kV switch cabinet contact according to claim 1, wherein the U-shaped groove is 10cm long, 6cm wide, and 3cm high. 3. The special fixture for measuring the thickness of the silver-plated layer of the 35kV switch cabinet contact according to claim 1, wherein a finger groove is provided on the first side wall of the U-shaped groove. 4. The special fixture for measuring the thickness of the silver-plated layer of the 35kV switch cabinet contact according to claim 1, wherein the first elastic element is sleeved on the first guide column, and one end of the first elastic element is connected to the The spring seat abuts, and the other end abuts and cooperates with the positioning shoulder on the first guide post. 5. The special fixture for measuring the thickness of the silver-plated layer of the 35kV switch cabinet contact according to claim 1 or 4, wherein the second elastic element is sleeved on the second guide column, and the second elastic element One end is in contact with the spring seat, and the other end is in contact with the positioning shoulder on the second guide column. 6. The special fixture for measuring the thickness of the silver-plated layer of the 35kV switch cabinet contact according to claim 1, further comprising a handle, wherein the handle is fixedly connected to the first guide post and the second guide post.