Device and method for measuring contact distance between moving and static contacts

Abstract

The invention discloses a movable and static contact contact distance measuring device and a measuring method thereof, and relates to the technical field of electrical equipment, and the device comprises a positioning housing, the front surface of the positioning housing is provided with a measuring slide scale capable of sliding along the positioning housing, the rear surface of the positioning housing is fixedly provided with a positioning semicircular ring, and the left end of the positioning housing is fixedly provided with a metal circular ring. A metal disc is fixed at the left end of the measuring slide ruler, vernier scale marks matched with the measuring slide ruler are arranged on the front surface of the positioning shell, the structure is simple, the contact distance between a moving contact and a static contact can be measured by shaking in and out the circuit breaker handcart once, the whole measuring process only needs 96 seconds, the vernier scale marks are matched with the measuring slide ruler, the measuring error can reach + / -0.1 mm, the measuring precision is high, and the measuring precision is high. Efficiency is high and cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to a device for measuring the contact distance between moving and static contacts and a method for measuring the contact distance between moving and static contacts. Background Art

[0002] Armored removable AC metal-enclosed switchgear (KYN switchgear) is a device that integrates circuit breakers, disconnectors, current transformers, grounding switches, etc. in a metal cabinet. Compared with open equipment, it has the advantages of easy installation and small footprint. However, due to its high integration and closed internal structure, operation and maintenance personnel cannot visually observe the status of internal components during operation, which can easily lead to misoperation.

[0003] In the commissioning acceptance and maintenance work of the KYN switch cabinet circuit breaker trolley, during the alignment process of the moving and static contacts, the operator cannot directly measure whether the connection between the contacts meets the technical requirements. Generally, the moving contact is smeared with vaseline, and the static contact is observed to make a judgment. When the mark is not obvious, the circuit breaker must be repeatedly shaken in and out for operation. This operation is extremely dependent on the operator's maintenance experience, and the measurement results are highly subjective and arbitrary. The newly commissioned switchgear can test the contact distance through the loop resistance to judge whether the moving and static contacts are in good contact. However, the loop resistance cannot be measured when the substation equipment is partially replaced during operation. This method has obvious limitations. The electronic contact contact distance measurement device is expensive and immature. There is currently no commercial product. It cannot be used when the substation equipment is partially replaced during operation, and it cannot judge whether the switch contacts are in good contact. Summary of the invention

[0004] In order to overcome the defects of low measurement efficiency, large error and high cost in the prior art, the present invention provides a device for measuring the contact distance between moving and static contacts and a method for measuring the same.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a device for measuring the contact distance between moving and static contacts, including a positioning shell, a front surface of the positioning shell is provided with a measuring slide that can slide along the positioning shell, a positioning semicircular ring is fixed to the rear surface of the positioning shell, a metal ring is fixed to the left end of the positioning shell, a metal disk is fixed to the left end of the measuring slide, and a vernier scale line matching the measuring slide is provided on the front surface of the positioning shell.

[0006] As a further improvement of the present invention, a damping groove of a limit measuring slide is provided on the front surface of the positioning housing.

[0007] As a further improvement of the present invention, the outer diameter of the metal ring matches the inner diameter of the plum blossom contact, and the inner diameter of the metal ring is larger than the width of the measuring slide.

[0008] As a further improvement of the present invention, millimeter-level scale lines are provided on the measuring slide.

[0009] As a further improvement of the present invention, two positioning semicircular rings are provided and symmetrically arranged on the rear surface of the positioning housing.

[0010] As a further improvement of the present invention, the positioning housing, the measuring slide and the positioning semicircular ring are all made of metal.

[0011] A measuring method for a moving and static contact contact distance measuring device comprises the following steps: step 1, first measuring the distance from the first end of a plum blossom contact to the first end of a moving contact, and pulling out the measuring slide ruler for the same distance, and recording the indication of the vernier scale line as position one; step 2, placing the measuring device into the inner tube of the moving contact, placing the positioning semicircular ring on the rear surface of the positioning shell on the inner lower wall of the moving contact, placing the metal ring on the inner lower wall of the plum blossom contact and close to the first end of the moving contact, and the metal disk on the measuring slide ruler being flush with the first end of the plum blossom contact, and the entire measuring device being kept in a horizontal state; step 3, pushing a trolley into a switch cabinet and swinging it in, when the plum blossom contact begins to contact the static contact, the static contact pushes the metal disk on the measuring slide ruler to move horizontally, and continuously approaches the fixed ring under the action of force until the trolley is swing into the working position; step 4, swinging the trolley out, at this time, recording the indication of the vernier scale line as position two, and the effective contact distance between the static contact and the moving contact can be obtained by taking the difference between position one and position two.

[0012] As a further improvement of the present invention, the left and right side surfaces of the metal ring and the metal disk are both plane.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the device has a simple structure, and the contact distance between the moving and static contacts can be measured by swinging the circuit breaker trolley in and out once. The entire measurement process only takes 96 seconds. The vernier scale line cooperates with the measuring slide, and the measurement error can reach ±0.1mm. The measurement accuracy is high, the efficiency is high, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 The present invention is a stereoscopic diagram of a device for measuring the contact distance between moving and static contacts.

[0016] Figure 2 It is a measurement schematic diagram of the present invention.

[0017] In the figure: 1. Positioning housing; 2. Measuring slide; 3. Metal ring; 4. Metal disk; 5. Positioning semicircular ring; 6. Vernier scale line; 7. Static contact; 8. Plum blossom contact; 9. Moving contact; 10. Damping groove. DETAILED DESCRIPTION

[0018] In order to make the technical solution and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] Reference Figure 1 The embodiment of the present invention discloses a device for measuring the contact distance between moving and static contacts, including a positioning shell 1, a measuring slide 2 capable of sliding along the positioning shell 1 is provided on the front surface of the positioning shell 1, a positioning semicircular ring 5 is fixed to the rear surface of the positioning shell 1, a metal ring 3 is fixed to the left end of the positioning shell 1, a metal disc 4 is fixed to the left end of the measuring slide 2, a vernier scale line 6 cooperating with the measuring slide 2 is provided on the front surface of the positioning shell 1, and the positioning shell 1, the measuring slide 2 and the positioning semicircular ring 5 are all made of metal.

[0020] The front surface of the positioning housing 1 is provided with a damping groove 10 for limiting the measuring slide 2 , so that the measuring slide 2 can slide smoothly along the positioning housing 1 .

[0021] A metal disc 4 is provided at the front end of the measuring slide 2, which is mainly responsible for bearing the reaction force of the static contact 7 when the trolley is swinging in, so that the measuring slide 2 can move smoothly through the damping groove 10. The surface of the measuring slide 2 is provided with millimeter-level scale lines showing the moving distance, and the positioning housing 1 is provided with vernier scale lines 6 indicating the relative moving distance. Accurate measurement values ​​can be obtained by reading the indications of the vernier scale lines 6.

[0022] The outer diameter of the metal ring 3 matches the inner diameter of the plum blossom contact 8, and the inner diameter of the metal ring 3 is larger than the width of the measuring slide 2. Two positioning semicircular rings 5 ​​are provided and symmetrically arranged on the rear surface of the positioning housing 1. During installation, the metal ring 3 is placed on the lower wall of the plum blossom contact 8 and close to the head end of the moving contact 9. The two positioning semicircular rings 5 ​​are placed on the inner wall of the moving contact 9. The positioning semicircular rings 5 ​​are arc-shaped and reliably fit with the inner wall of the moving contact of the trolley. The installation is convenient, thereby effectively ensuring that the measuring device can remain horizontal without deviation during the vibration of the trolley being shaken in and out.

[0023] Reference Figure 1 and Figure 2A measuring method for a moving and static contact contact distance measuring device comprises the following steps: step 1, firstly measuring the distance from the head end of the plum blossom contact 8 to the head end of the moving contact 9, and pulling the measuring slide ruler 2 out to the same distance, and recording the indication of the vernier scale line as position 1; step 2, placing the measuring device into the inner tube of the moving contact 9, placing the positioning semicircular ring 5 on the rear surface of the positioning housing 1 on the inner lower wall of the moving contact 9, placing the metal ring 3 on the inner lower wall of the plum blossom contact 8 and close to the head end of the moving contact 9, measuring the metal disc 4 on the slide ruler 2 and the plum blossom contact 8, and measuring the distance between the metal disc 4 and the plum blossom contact 8; The head end of the flower contact 8 is flush, and the entire measuring device remains horizontal; step three, push the trolley into the switch cabinet and swing it in. When the plum blossom contact 8 begins to contact the static contact 7, the static contact 7 pushes the metal disc 4 on the measuring slide 2 to move horizontally, and under the action of force, it continues to approach the fixed ring 3 until the trolley is swung into the working position; step four, swing the trolley out. At this time, the cursor scale line 6 indicates and is recorded as position two. By taking the difference between position one and position two, the effective contact distance between the static contact 7 and the moving contact 9 can be obtained.

[0024] The whole device is made of metal material without electronic devices. The contact distance between the moving and static contacts can still be measured when the busbar is running, without worrying about insulation problems. The positioning semicircular ring 5 adopts an arc design, which fits reliably with the inner wall of the moving contact of the trolley. It is easy to install and can be reliably fixed by directly placing it. The operation is convenient. The contact distance between the moving and static contacts can be measured by shaking the circuit breaker trolley in and out once. The whole measurement process only takes 96 seconds. It has its own size scale, the measurement error can reach ±0.1mm, and the measurement accuracy is high.

[0025] The left and right sides of the metal ring 3 and the metal disk 4 are both flat, thereby ensuring that the measured value is more accurate.

[0026] It should be understood that the specific embodiments described herein are only used to understand the present invention and are not used to limit the present invention. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A device for measuring the contact distance between moving and static contacts, characterized in that: The invention comprises a positioning housing (1), wherein the front surface of the positioning housing (1) is provided with a measuring slide (2) capable of sliding along the positioning housing (1), a positioning semicircular ring (5) is fixed to the rear surface of the positioning housing (1), a metal ring (3) is fixed to the left end of the positioning housing (1), a metal disc (4) is fixed to the left end of the measuring slide (2), and a vernier scale line (6) cooperating with the measuring slide (2) is provided on the front surface of the positioning housing (1).

2. A moving contact and static contact distance measuring device according to claim 1, characterized in that: The front surface of the positioning housing (1) is provided with a damping groove (10) for a limit measuring slide ruler (2).

3. A moving contact and stationary contact distance measuring device according to claim 2, characterized in that: The outer diameter of the metal ring (3) matches the inner diameter of the plum blossom contact (8), and the inner diameter of the metal ring (3) is larger than the width of the measuring slide (2).

4. A moving and static contact distance measuring device according to claim 3, characterized in that: The measuring slide ruler (2) is provided with millimeter-level scale lines.

5. A moving and static contact distance measuring device according to claim 4, characterized in that: Two positioning semicircular rings (5) are provided and are symmetrically arranged on the rear surface of the positioning housing (1).

6. A moving contact and stationary contact distance measuring device according to claim 5, characterized in that: The positioning housing (1), the measuring slide (2) and the positioning semicircular ring (5) are all made of metal.

7. A method for measuring the contact distance between moving and static contacts according to any one of claims 1 to 6, characterized in that: The following steps are included: Step 1: first measure the distance from the first end of the plum blossom contact (8) to the first end of the moving contact (9), and pull the measuring slide (2) out to the same distance, and record the indication of the vernier scale line as position 1; Step 2: Place the measuring device into the inner tube of the moving contact (9), place the positioning semicircular ring (5) on the rear surface of the positioning housing (1) on the inner lower wall of the moving contact (9), place the metal ring (3) on the inner lower wall of the plum blossom contact (8) and close to the head end of the moving contact (9), and place the metal disk (4) on the measuring slide (2) flush with the head end of the plum blossom contact (8), and keep the entire measuring device in a horizontal state; Step 3: Push the trolley into the switch cabinet and swing it in. When the plum blossom contact (8) comes into contact with the stationary contact (7), the stationary contact (7) pushes the metal disc (4) on the measuring slide (2) to move horizontally, and under the action of force, it continuously approaches the fixed ring (3) until the trolley swings into the working position. Step 4, swing the trolley out. At this time, the cursor scale line (6) indicates position 2. By taking the difference between position 1 and position 2, the effective contact distance between the static contact (7) and the moving contact (9) can be obtained.

8. A method for measuring the contact distance between moving and static contacts according to claim 7, characterized in that: The left and right side surfaces of the metal ring (3) and the metal disk (4) are both planes.

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