CN110702005A - Handcart switch cabinet - Google Patents

Abstract

The invention relates to a handcart switch cabinet, comprising a body and a detection component. The detection component includes a spherical reflector and a green laser. The green laser emits a laser beam parallel to the horizontal axis of the green laser to the spherical reflector, and the laser beam passes through the spherical reflector. The reflector reflects the reflected beam that enters the moving contact, and calculates the centering situation of the moving contact and the static contact through the angle α between the reflected beam and the laser beam; the advantages of the present invention: the present invention detects the green The optical laser emits a laser beam, and the laser beam is formed by a spherical reflector installed on the static contact to enter the reflected beam of the moving contact. The angle α between the reflected beam and the laser beam is used to calculate the difference between the moving contact and the static contact. The centering situation, and the centering situation of the moving contact and the static contact during operation is visually displayed on the display through the electronic endoscope camera, so that the centering situation of the moving and static contacts can be clearly observed, and the centering situation of the moving and static contacts can be clearly observed. Observe the error in alignment, and the direction of the error.

Description

Handcart switch cabinet

technical field

The invention relates to a handcart switch cabinet.

Background technique

The handcart switchgear is widely used in the power industry, and is the first choice for almost all new power transmission and distribution equipment below 35kV. The handcart switchgear is rich in functions, flexible in configuration, and convenient for on-site installation. Installation brings great convenience. However, the handcart switch cabinet has a relatively obvious defect, that is, the internal abnormality is not easy to find, especially the problem caused by the overheating of the internal contacts, which has always been one of the important causes of switch cabinet equipment failure.

The handcart switch cabinet uses spring-type plum-blossom contacts or in-line contacts to realize the electrical connection between some components of the handcart and the fixed components in the cabinet. The spring-type plum-blossom contacts or in-line contacts can realize the Good electrical contact and a certain degree of tolerance for combined accuracy. Generally, the insertion depth or centering error within 2-3 mm will not affect the normal flow. However, due to the on-site installation and construction process, the ground foundation Due to the flatness and the machining accuracy of the switchgear itself, it is sometimes difficult to ensure that the combination error between the dynamic and static contacts of the switchgear is within the standard. It even causes the insulation breakdown of the contact box to cause a tripping accident. In recent years, with the increasing number of switchgear manufacturers and the construction period requirements of on-site construction, many switchgears have problems with the combination of dynamic and static contacts during construction and installation, resulting in switchgear accidents in recent years. brought great challenges.

Although the existing technology provides optical fiber temperature measurement, surface acoustic wave wireless temperature measurement and other technologies, which can prevent or monitor the contact failure of the handcart switch cabinet in the later stage, the installation cost is high and the power outage construction is required. Even if an abnormality is found, the power outage is processed. It will lead to greater economic losses and user disgust. Therefore, in the civil construction stage, a solution to this problem should be developed and implemented, in order to fundamentally eliminate the accident caused by the poor contact of the switch cabinet.

However, due to the special structure of the handcart switch cabinet, the sight of the switch baffle and the valve baffle is blocked. Even if the construction unit wants to detect and adjust the centering or insertion depth of the contacts during installation, it is difficult to do it on site. Generally, The indirect method is used for rough measurement, and the contact is opened and closed by applying Vaseline, the insertion depth is estimated by observing the oil trace of Vaseline, and the degree of alignment is estimated by observing the skewness of the plum-blossom contact. However, practice has proved that this indirect method test The error of the combined state of the contacts is very large, especially for the plum-blossom contacts with tight springs. Even if the moving and static contacts are seriously eccentric, the plum-blossom contacts will appear to be slightly skewed due to the dragging effect of one side of the moving contacts when they are pulled out. It can be seen that the existing solutions are obviously insufficient; on the other hand, in recent years, the opening and closing of the shutters of the switch cabinets has caused the shutters to not be tightly closed, and the accident of electric shocks by the maintenance personnel has also occurred many times. How to install and debug in a timely manner It is also one of the important factors to ensure the safe operation of switchgear equipment to find out whether the opening and closing of the valve baffle is smooth and free from jamming. For the above problems, we developed a method that can directly observe the combination of internal contacts through the opening and closing of the handcart baffle. The technology of the speed and the opening and closing status of the valve baffle will greatly help the construction quality of the switch cabinet of the opponent's car and the containment of the hidden danger of accidents after it is put into operation in the future.

SUMMARY OF THE INVENTION

The purpose to be achieved by the present invention is to provide a handcart switch cabinet, which can intuitively grasp the centering situation of the moving contact and the static contact, and realize the centering detection of the moving contact and the static contact.

In order to solve the above technical problems, the present invention is achieved by the following technical solutions: a handcart switch cabinet includes a body, the body includes a moving contact and a static contact, the moving contact includes a conductive rod, and also includes a detection component and Electronic endoscope camera, the detection component includes a spherical reflector and a green laser, the green laser is arranged on a conductive rod, and the horizontal axis of the green laser coincides with the horizontal axis of the conductive rod, and the spherical reflector The mirror is arranged on the static contact, and the horizontal axis of the spherical reflector coincides with the horizontal axis of the static contact. The green laser emits a laser beam parallel to the horizontal axis of the green laser to the spherical reflector, and the laser beam passes through the spherical reflector. The mirror reflects the reflected beam that enters the moving contact, and the centering situation of the moving contact and the static contact is calculated by the angle α between the reflected beam and the laser beam. The electronic endoscope camera is suspended in the body, so The electronic endoscope camera is connected with a display or a mobile phone.

Preferably, the centering of the movable contact and the static contact is calculated according to the following formula, H=sin2α/R, where H is the distance between the laser beam and the central axis of the spherical mirror, and R is the spherical radius of the spherical mirror.

Preferably, the conductive rod is provided with a fixing hole for fixing the green laser, and the green laser is detachably installed in the fixing hole.

Preferably, the green laser is further provided with a fixing sleeve, and the fixing sleeve is installed in the fixing hole with clearance fit.

Preferably, the spherical reflector is provided with self-adhesive, and the spherical reflector is fixedly connected to the static contact through the self-adhesive.

Preferably, the spherical mirror is a convex mirror.

Preferably, the display and the electronic endoscope camera are transmitted through a wireless network or a wired network.

Preferably, a suspension rope is also connected to the electronic endoscope camera, the electronic endoscope camera is suspended in the body through the suspension rope, and the suspension rope is further provided with a battery box for supplying power to the electronic endoscope camera .

Preferably, the main body further includes an operating lever, the operating lever is provided with a rocking handle, and the rocking handle is provided with a torsion meter.

Preferably, the rocking handle includes a connecting rod connected to the operating rod, and a handle that is easy for the operator to grasp, the torsion gauge is arranged in the middle of the connecting rod, and the handle is arranged on the connecting rod.

To sum up, the advantages of the present invention are as follows: the present invention emits a laser beam through the green laser in the detection component, and the laser beam is formed by the spherical reflector installed on the static contact to form a reflected beam that enters the moving contact, and is reflected by The angle α between the beam and the laser beam is used to calculate the centering of the moving contact and the static contact, and the centering of the moving contact and the static contact during operation is visually displayed on the monitor or mobile phone through the electronic endoscope camera. Then, the alignment of the moving and static contacts can be clearly observed, and the alignment error and the direction of the error can be clearly observed. Secondly, during the test operation, the display or mobile phone can receive the electronic endoscope camera. The video shot can observe the operation of the valve baffle, the baffle connecting rod and other components. Finally, the centering detection of the moving contact and the static contact is realized by the laser beam. Because the green laser emits the laser beam, it has good insulation. The existing alignment technology can only be used for the occasions where the motor shaft or no high voltage is used, because the switchgear in operation rarely has the condition that the busbar and the outlet line will be shut down at the same time. The invention enables the centering detection of the switch cabinet contacts to be performed without the need for a power failure on the busbar, which greatly improves the convenience of fault elimination of the switch cabinet equipment, and can avoid a large number of contact burnout accidents caused by the low debugging accuracy of the switch cabinet equipment. The technical solution has effectively improved the operation reliability of the medium and low voltage distribution network.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

1 is a schematic structural diagram of an electronic endoscope camera head and a crank handle in the handcart switch cabinet of the present invention;

2 is a schematic diagram of the reflection principle of the laser centering optical path of the detection component in the present invention;

3 is a schematic structural diagram of a detection assembly in the present invention;

4 is a schematic structural diagram of the connection of an electronic endoscope camera head in the present invention;

FIG. 5 is a schematic structural diagram of the crank handle in the present invention.

Reference number:

1 main body, 11 display, 12 operating rod, 2 moving contacts, 21 conductive rods, 22 fixed holes, 3 static contacts, 4 detection components, 41 spherical mirrors, 42 green lasers, 43 fixed sleeves, 44 stickers , 45 laser beams, 46 reflected beams, 5 electronic endoscopic cameras, 51 suspension ropes, 52 battery boxes, 6 rocking handles, 61 connecting rods, 62 handles, 63 sleeves, 7 torque gauges.

Detailed ways

As shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, the handcart switch cabinet includes a main body 1, the main body 1 includes a moving contact 2 and a static contact 3, and the moving contact 2 includes conductive The rod 21 also includes the detection component 4 and the electronic endoscope camera 5. Considering that the interior space of the handcart switch is large, the position of the endoscope lens is not easy to be fixed, so the electronic endoscope camera 5 is a 360-degree panoramic camera, which can be rotated by external The rod control is convenient to expand the internal observation range. The detection component 4 includes a spherical reflector 41 and a green laser 42. The spherical reflector 41 and the green laser 42 are six, which are respectively installed in the body 1. Three-phase Inside the six moving contacts 2 and the static contacts 3, the green laser 42 is arranged on the conductive rod 21, and the horizontal axis of the green laser 42 coincides with the horizontal axis of the conductive rod 21, and the spherical mirror 41 is arranged on the static contact 3, and the horizontal axis of the spherical mirror 41 coincides with the horizontal axis of the static contact 3, the green laser 42 emits a laser beam 45 parallel to the horizontal axis of the green laser 42 to the spherical mirror 41, The laser beam 45 is reflected by the spherical mirror 41 to form a reflected beam 46 that enters the moving contact 2, and the centering of the moving contact 2 and the stationary contact 3 is calculated by the angle α between the reflected beam 46 and the laser beam 45 , the electronic endoscope camera 5 is suspended in the main body 1, and the electronic endoscope camera 5 is connected with a display 11, and the display 11 can be placed on the operator's hand according to actual operation requirements.

In the present invention, the green laser 42 in the detection component 4 emits a laser beam 45, and the laser beam 45 is formed by the spherical mirror 41 installed on the static contact 3 to form a reflected beam 46 that enters the moving contact 2, and passes through the reflected beam 46. The centering situation of the moving contact 2 and the static contact 3 is calculated by the angle α between the laser beam 45, and the centering situation of the moving contact 2 and the static contact 3 during operation is intuitively visualized through the electronic endoscope camera 5. Displayed on the display 11, the centering situation of the moving and static contacts 3 can be clearly observed, and the centering error and the direction of the error can be clearly observed. If the moving contact and the static contact are in a straight line, Then the reflected beam of the laser beam to the spherical mirror must be parallel to the laser beam. If it is not in a straight line, the reflected beam will be deflected significantly. Second, during the test operation, the display 11 can receive the video shot by the electronic endoscope camera 5, and can observe the operation of the valve baffle, the baffle link and other components, and finally, the laser beam 45 can realize the dynamic touch For the alignment detection of the head 2 and the static contact 3, since the green laser 42 emits the laser beam 45 with good insulation ability, the detection under the condition of partial electrification of the switch cabinet is realized, and the existing alignment technology can only be used for the motor shaft. In the case of or without high-voltage electricity, because the switchgear in operation rarely has the condition that the busbar and the outgoing line are out of service at the same time, the present invention enables the switchgear contact centering detection to be performed without the need for a power outage of the busbar, which greatly improves the performance of the switchgear. The convenience of fault elimination of switchgear equipment is a technical solution that can avoid a large number of contact burnout accidents caused by low debugging accuracy of switchgear equipment, and effectively improves the operation reliability of the medium and low voltage distribution network.

The centering of the movable contact 2 and the static contact 3 is calculated according to the following formula, H=sin2α/R, where H is the distance between the laser beam 45 and the central axis of the spherical mirror, and R is the spherical radius of the spherical mirror 41, so , by observing the angle between the reflected beam 46 and the incident laser beam 45, the vertical distance between the neutral line of the moving contact 2 and the neutral line of the stationary contact 3 can be calculated, so as to play the role of centering detection.

The conductive rod 21 is provided with a fixing hole 22 for fixing the green laser 42. The green laser 42 is detachably installed in the fixing hole 22, so that the green laser 42 can be quickly installed and fixed, and the green laser 42 can be fastened. 42 and the fixing hole 22 are arranged in a detachable installation mode, and different types of green lasers 42 can be selected according to different types of conductive rods 21. The green laser 42 is also provided with a fixing sleeve 43, and the fixing sleeve 43 passes through. It is installed in the fixing hole 22 with a good fit, which can improve the fixing quality of the green laser 42 on the conductive rod 21. The spherical reflector 41 is provided with a sticker 44, and the spherical reflector 41 passes through the sticker 44. The fixed connection on the static contact 3 can improve the fixing quality of the spherical reflector 41 . The spherical reflector 41 is a convex mirror and can improve the reflection effect of the laser beam 45 .

The display 11 and the electronic endoscope camera 5 are transmitted through a wireless network or a wired network, which can realize fast transmission of video data and can adapt to different application occasions. The electronic endoscope camera 5 is also connected with a suspension rope 51. The electronic endoscope camera 5 is suspended in the main body 1 by a suspension rope 51. The suspension rope 51 is also provided with a battery box 52 for supplying power to the electronic endoscope camera 5. The fixed quality of the electronic endoscopic camera 5 is convenient for installation and disassembly, and the battery box 52 can stably supply power to the electronic endoscopic camera 5 to ensure the normal operation of the electronic endoscopic camera 5 .

For the blockage and jamming during the operation, it is generally caused by the deformation of the mechanical structure of the guide rails, wheels, valve connecting rods and other components, improper installation or lack of lubrication, etc. These problems are also common problems in handcart switch cabinets, especially below 10KV Due to the large production and sales volume and the low technical threshold of manufacturers, many products with low machining accuracy are also put into the market, which brings hidden dangers to the operation of the equipment. For this problem, the torque of the crank handle is adjusted. Detection is a very effective method. The project can effectively detect the possible problems between the handcart or the moving parts of the main body 1 by setting the torque display 11 on the main body and observing the torque reading during the operation process. The main body 1 further includes an operating rod 12, the operating rod 12 is provided with a rocker handle 6, and the rocker handle 6 is provided with a torsion gauge 7, which is convenient for the operator to operate, and the torque table 7 can be used to obtain the information of the rocker handle 6 during operation. The torque reading can be used to know whether the resistance received by the handcart during operation is uniform, whether the mechanism is jammed, etc., which further improves the installation and construction quality of the handcart switch cabinet. 61, and a section of handle 62 that is convenient for the operator to grasp, the torsion meter 7 is arranged in the middle of the connecting rod 61, the handle 62 is arranged on the connecting rod 61, and the setting of the connecting rod 61 can realize the rocking handle 6 and the operation The quick connection of the rod 12, and different connecting rods 61 can be rotated according to different types of handcart switch cabinets. In order to improve the connection strength of the connecting rod 61 and the operating rod 12, a sleeve 63 is provided on the connecting rod 61 in this embodiment. The setting of the handle 62 is convenient for the operator to hold, and the torque meter 7 is arranged in the middle of the connecting rod 61, which is convenient for the operator to observe the value of the torque meter 7, and the operation effect is good.

In addition to the above-mentioned preferred embodiments, the present invention also has other embodiments, and those skilled in the art can make various changes and modifications according to the present invention, as long as they do not depart from the spirit of the present invention, they shall all belong to the definitions of the appended claims of the present invention scope.

Claims (10)

1. A handcart switch cabinet, including a body, the body includes a moving contact and a static contact, the moving contact includes a conductive rod, and it is characterized in that: it also includes a detection component and an electronic endoscope camera, the detection component It includes a spherical reflector and a green laser, the green laser is arranged on the conductive rod, and the horizontal axis of the green laser coincides with the horizontal axis of the conductive rod, the spherical reflector is set on the static contact, and the spherical The horizontal axis of the reflector coincides with the horizontal axis of the static contact, the green laser emits a laser beam parallel to the horizontal axis of the green laser to the spherical reflector, and the laser beam is reflected by the spherical reflector to form a beam that enters the moving contact. The reflected beam is used to calculate the alignment of the moving contact and the static contact by the angle α between the reflected beam and the laser beam. The electronic endoscope camera is suspended in the body, and a display is connected to the electronic endoscope camera. or mobile phone. 2 . The handcart switch cabinet according to claim 1 , wherein the centering condition of the moving contact and the stationary contact is calculated according to the following formula, H=sin2α/R, wherein H is the difference between the laser beam and the spherical mirror. 3 . The distance of the axis, R is the spherical radius of the spherical mirror. 3 . The handcart switch cabinet according to claim 1 , wherein the conductive rod is provided with a fixing hole for fixing the green laser, and the green laser is detachably installed in the fixing hole. 4 . 4 . The handcart switch cabinet according to claim 3 , wherein the green laser is further provided with a fixing sleeve, and the fixing sleeve is installed in the fixing hole with an interference fit. 5 . 5 . The handcart switch cabinet according to claim 1 , wherein a sticker is provided on the spherical reflector, and the spherical reflector is fixedly connected to the static contact through the sticker. 6 . 6 . The handcart switch cabinet according to claim 5 , wherein the spherical reflector is a convex mirror. 7 . 7 . The handcart switch cabinet according to claim 1 , wherein the display and the electronic endoscope camera are transmitted through a wireless network or a wired network. 8 . 8 . The handcart switch cabinet according to claim 7 , wherein a suspension rope is also connected to the electronic endoscope camera, and the electronic endoscope camera is suspended in the body through the suspension rope, and the suspension There is also a battery box on the rope that supplies power to the electronic endoscope camera. 9 . The handcart switch cabinet according to claim 1 , wherein the main body further comprises an operating lever, the operating lever is provided with a rocker handle, and the rocker handle is provided with a torsion meter. 10 . 10 . The handcart switch cabinet according to claim 9 , wherein the rocking handle comprises a connecting rod connected with the operating rod and a handle which is convenient for the operator to grasp, and the torsion meter is arranged on the connecting rod. 11 . The middle part of the handle is arranged on the connecting rod.

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