Emergency tripping device

Abstract

The present invention provides an emergency tripping device, which belongs to the technical field of electric power equipment. It solves the problem that it is difficult to ensure the accuracy of the propulsion distance when installing the existing tripping device. The emergency tripping device includes a shell, an adsorption magnet and a drive motor fixed to the shell, the drive motor has a propulsion shaft that can move axially and extend out of one side of the shell, and a tripping head is provided at the outer end of the propulsion shaft. An elastic member is provided between the tripping head and the propulsion shaft. The tripping head can move in a direction away from the propulsion shaft under the elastic force of the elastic member, and when the tripping head is subjected to an axial force, it can compress the elastic member and move toward the propulsion shaft. The emergency tripping device has the advantage of easy installation.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment, and relates to an emergency tripping device, and in particular to an emergency tripping device for a switch circuit breaker. Background Art

[0002] The circuit breakers of high-voltage switch cabinets are usually operated remotely, that is, remotely operated by a microcomputer in the main control room. However, when the circuit breaker fails and cannot be disconnected by remote operation, the operation and maintenance personnel have to disconnect the circuit breaker at close range. During this operation, if the circuit breaker is mechanically stuck, it may endanger the personal safety of the operator nearby.

[0003] To this end, people have designed a portable mechanical electric opening device for high-voltage switchgear and applied for a Chinese patent with the application number: 201921739965.7; its announcement number: CN210429582U; the opening device includes a crossbar motor assembly, a knob magnet base set, a remote control receiver, a battery, and a remote control. These unit combinations are used to perform emergency opening of the switchgear circuit breaker. Among them, the knob magnet base set has two sets and adopts a longitudinal fixing rod, and the crossbar motor assembly adopts a transverse fixing rod. The longitudinal fixing rod and the transverse fixing rod are connected through the steering connector in the crossbar motor assembly, so that the motor in the crossbar motor assembly can move forward, backward, left and right.

[0004] When in use, the two knob magnets are adsorbed on the panel of the switch cabinet, and the position of the motor is adjusted along the horizontal fixing rod and the longitudinal fixing rod so that the end of the motor propulsion shaft is directly opposite to the circuit breaker opening button and maintains a suitable distance. After that, the propulsion motor propulsion rod is controlled to move forward or backward outdoors through the remote control to enable on-site staff to perform on-site circuit breaker opening operations outdoors, which is highly safe.

[0005] However, when adjusting the position of the propulsion motor's propulsion rod so that it is aligned with the circuit breaker trip button and a suitable distance is maintained between the two, since the position adjustment relies entirely on visual inspection and part of the line of sight is blocked by the propulsion motor, it is difficult to ensure that it can be quickly adjusted to the appropriate position and distance in an emergency. It is easy for the propulsion rod to be pushed forward insufficiently, resulting in an inability to effectively trip the circuit breaker, or for the propulsion rod to be pushed forward too far, resulting in the entire trip device falling off the switch cabinet panel and breaking.

[0006] Faced with this situation, for those skilled in the art, the conventional technical means that can be easily thought of is to add a distance measuring structure to the opening device to replace manual visual inspection. When the opening device is adsorbed on the cabinet surface of the switch cabinet, the distance measuring structure can be used to detect and give a specific value of the advancement distance, thereby improving the accuracy of position adjustment. However, in the actual operation process, it is difficult to manually adjust the distance between the outer end of the motor propulsion shaft and the opening button to a sufficient accuracy due to various factors such as the flatness of the switch cabinet surface, manual installation adjustment errors, and distance measuring structure errors. Summary of the invention

[0007] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose an emergency tripping device, which solves the problem that it is difficult to ensure the accuracy of the advancement distance when installing the existing tripping device.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] An emergency tripping tripping device comprises a shell, an adsorption magnet fixed on the shell, and a driving motor, wherein the driving motor has a propulsion shaft which can move axially and extend out of one side of the shell, and is characterized in that a tripping head is provided at the outer end of the propulsion shaft, and an elastic member is provided between the tripping head and the propulsion shaft, and the tripping head can move in a direction away from the propulsion shaft under the elastic force of the elastic member, and when the tripping head is subjected to an axial force, the elastic member can be compressed and move toward the propulsion shaft.

[0010] When the emergency tripping device is in use, the operator adsorbs the entire shell onto the door of the switch cabinet through the adsorption magnet, and aligns the position of the tripping head with the position of the tripping button, then starts the drive motor to drive the propulsion shaft to extend axially, and under the elastic force of the elastic member, the tripping head is pushed outward along with the propulsion shaft, and when the outer end of the tripping head moves to the tripping button, the tripping button is pressed under the elastic force of the elastic member to achieve tripping; when the propulsion shaft continues to be pushed outward after the tripping button is pressed, the tripping head abuts against the tripping button, and the elastic member is compressed by the obstruction at the tripping button.

[0011] During this working process, a jumping head is provided at the outer end of the propulsion shaft to lengthen the axial length of the entire propulsion shaft for pressing the opening button, thereby avoiding the situation where the propulsion shaft is not pushed out far enough and the opening button cannot be pressed; at the same time, when the axial push-out distance of the propulsion shaft is too large, the jumping head can compress the spring to contract, and the entire shell will not be pushed out of the switch cabinet, which greatly reduces the installation accuracy requirements of the shell and makes installation more convenient.

[0012] In the above-mentioned emergency tripping device, the side of the shell from which the outer end of the propulsion shaft extends is the adsorption side, and the shell is also connected to a controller and a distance detector. The distance detector deviates from the extended position of the propulsion shaft and can detect the distance between the shell and an obstacle on the adsorption side of the shell. The controller can control the drive motor to retract the propulsion shaft when the distance between the obstacle and the shell increases to a set value. In this case, the obstruction is the switch cabinet door. When the shell is adsorbed at a suitable position on the switch cabinet door, the adsorption side is opposite to the switch cabinet door, and there is no obstruction on the switch cabinet at the outer end of the propulsion shaft, which allows the outer end of the propulsion shaft to extend to trigger the trip button. The other positions of the adsorption side that deviate from the outer end of the propulsion shaft are opposite to the switch cabinet door and the distance between the two is basically kept constant. The distance detector is used to detect the distance between the adsorption side and the switch cabinet door. When the distance changes from small to large until it reaches the set value, it is determined that the propulsion shaft is over-propelled and the shell is leaving the switch cabinet door. At this time, the controller receives the signal sent by the distance detector, controls the drive motor to stop pushing out the propulsion shaft and drives the propulsion shaft to retract in the opposite direction to prevent the shell from falling off the switch cabinet door, effectively protects the propulsion shaft from excessive advancement, and further reduces the distance accuracy requirements between the propulsion shaft and the trip button when the shell is installed. Here, the set value can be set according to the interval between the spacing when the shell is installed on the switch cabinet door and the spacing when the shell falls during actual testing.

[0013] In the above-mentioned emergency tripping device, a sound detector capable of detecting the size of ambient sound is also connected to the shell, and the controller can control the drive motor to retract the propulsion shaft when the ambient sound is greater than a set value. When the tripping button of the switch cabinet is pressed, a tripping sound will be emitted when the tripping is realized. The tripping state is detected by the sound detector, and the controller controls the propulsion shaft to retract in time after the tripping is completed, so as to avoid excessive advancement of the propulsion shaft. In conjunction with the use of the above-mentioned distance detector, double protection is provided against excessive advancement of the propulsion shaft, effectively preventing the entire shell from falling off due to too tight installation distance.

[0014] In the above-mentioned emergency tripping device, the distance detector includes a long rod-shaped push rod, a switch connected to the controller, and a spring sheet connected to the switch. The inner end of the push rod can abut against the spring sheet. The spring sheet can make the outer end of the push rod extend from the adsorption side of the shell under the action of its own elastic force. The switch can send a retraction signal to the controller when the spring sheet pushes the push rod outward to a set distance. When the shell is adsorbed on the switch cabinet door, the switch cabinet door blocks the push rod from extending outward. The inner end of the push rod acts on the spring sheet to bend it inward. When the propulsion shaft pushes the distance too large, the shell gradually moves away from the switch cabinet door. The spring sheet recovers and pops outward under the action of its own elastic force. The push rod is pushed outward under the elastic force of the spring sheet. The spring sheet moves away from the switch. The switch sends a retraction signal to the controller, and the drive motor drives the propulsion shaft to retract. The mechanical distance detector is less affected by external environmental factors and the detection result is more reliable.

[0015] In the above-mentioned emergency tripping device, the mandrel includes a rod body and an adjustment sleeve threadedly connected to the outside of the outer end of the rod body, and the adjustment sleeve is made of insulating material. The adjustment sleeve made of insulating material can not only ensure the safety of use, but also adjust the axial length of the mandrel as a whole by rotating the adjustment sleeve, so that the distance detection of the mandrel in the same tripping device can be applied to more different switch cabinet usage requirements, and has a wide range of applications.

[0016] As another case, in the above-mentioned emergency tripping device, the distance detector includes an infrared distance measuring sensor.

[0017] In the above-mentioned emergency tripping device, the tripping head is barrel-shaped and one open end is sleeved on the outside of the outer end of the propulsion shaft, the outer side of the outer end of the propulsion shaft is threadedly connected with a ring-shaped connecting ring, the inner wall of the open end of the tripping head has a protruding limiting portion, and the two ends of the elastic member act on the inner side of the closed end of the tripping head and the connecting ring respectively, and the limiting portion can abut against the connecting ring. The tripping head is barrel-shaped and sleeved on the outside of the propulsion shaft, which increases the radial size of the tripping head, reduces the installation accuracy requirements for the radial position of the propulsion shaft, and further facilitates installation. In addition, according to the actual use environment, the overall axial length of the propulsion shaft and the tripping head can also be adjusted by rotating the connecting ring to adapt to the use requirements of different use environments.

[0018] In the above-mentioned emergency tripping device, a detection magnet is fixed on the tripping head, a magnetic switch is fixed on the side of the shell where the propulsion shaft extends, the magnetic switch is connected to the controller, and the positions of the magnetic switch and the detection magnet correspond. After the trip button is pressed, the propulsion shaft retracts in the opposite direction until the detection magnet approaches the magnetic switch, the magnetic switch closes, and the controller sends a signal to the drive motor to control the drive motor to stop working. The return control is achieved by the cooperation of the detection magnet and the magnetic switch to prevent the propulsion shaft from retracting too much and affecting the next extension stroke.

[0019] In the above-mentioned emergency tripping device, the side of the housing where the propulsion shaft extends has a protruding annular positioning ring, the outer end of the propulsion shaft can pass through the positioning ring, and the magnetic switch is fixed at the positioning ring. The positioning ring protrudes from the side of the housing, which not only facilitates the installation of the magnetic switch, but also provides a position indication of the propulsion shaft when the housing is installed on the switch cabinet door, which is more conducive to installation.

[0020] In the above-mentioned emergency tripping device, a through hole is provided on the housing, and a side wall of the through hole has a straight strip-shaped guide groove along the axial direction, and a protruding guide portion is provided on the outer side of the tripping head, and the guide portion extends into the guide groove. The movement of the tripping head is more stable through the cooperation of the guide groove and the guide portion.

[0021] Compared with the prior art, the emergency tripping device has the following advantages:

[0022] 1. By sleeve-arranging a jumping head on the outside of the propulsion shaft and arranging an elastic member between the jumping head and the propulsion shaft, the axial length and radial width of the propulsion shaft are increased, and the installation accuracy requirement when the shell of the jumping device is adsorbed on the switch cabinet door is reduced, which facilitates installation and prevents the shell from falling off the switch cabinet.

[0023] 2. Double protection against excessive propulsion of the propulsion shaft is achieved by using a sound detector to detect the tripping sound of the switch and a distance detector to detect whether the shell is detached from the switch cabinet door, which effectively ensures that the shell will not fall off, thereby reducing the axial distance accuracy requirements during shell installation and facilitating installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the emergency tripping device.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the emergency tripping device from another perspective.

[0026] Figure 3 It is a structural schematic diagram of the adsorption side of the emergency tripping device.

[0027] Figure 4 It is a schematic diagram of the cross-sectional structure of the emergency tripping device when the tripping head compresses the elastic member.

[0028] Figure 5 This is the principle block diagram of the emergency tripping device.

[0029] In the figure, 1. shell; 11. adsorption side; 12. positioning ring; 13. through hole; 2. adsorption magnet; 3. driving motor; 31. propulsion shaft; 4. jumping head; 41. limit part; 5. elastic part; 6. controller; 7. distance detector; 71. push rod; 72. switch; 73. spring; 8. sound detector; 9. connecting ring; 10. detection magnet; 101. magnetic switch. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] Embodiment 1

[0032] like Figure 1 As shown, the emergency tripping device includes a housing 1, an adsorption magnet 2 and a drive motor 3 fixed on the housing 1. One side of the housing 1 is an adsorption side 11 for being arranged opposite to the switch cabinet, and a through hole 13 is provided on the housing 1 of the adsorption side 11. The drive motor 3 has a propulsion shaft 31 that can axially pass through the through hole 13 and extend from the housing 1 from the adsorption side 11. In this embodiment, the adsorption magnet 2 is a knob magnet and at least two are fixed on the housing 1; the drive motor 3 is a propulsion motor that can drive the propulsion shaft 31 to move axially, and one side of the adsorption side 11 of the housing 1 is a plane.

[0033] The outer end of the propulsion shaft 31 is provided with a jumping head 4, which is in a cylindrical shape and has an open end sleeved on the outer side of the outer end of the propulsion shaft 31. The outer side of the outer end of the propulsion shaft 31 is threadedly connected with a connecting ring 9 in a circular shape. The inner wall of the open end of the jumping head 4 has a protruding limiting portion 41 in a circular shape. An elastic member 5 is provided between the jumping head 4 and the propulsion shaft 31. The two ends of the elastic member 5 act on the inner side of the closed end of the jumping head 4 and the connecting ring 9 respectively. The limiting portion 41 can abut against the connecting ring 9 under the elastic force of the elastic member 5. In this embodiment, the jumping head 4 is a split structure, including a cylindrical body and an end cap threadedly connected to the front end of the cylinder body; the elastic member 5 is a spring; a locking hole is opened through the side of the connecting ring 9, and a locking pin is connected in the locking hole. After the connecting ring 9 is threadedly connected to the propulsion shaft 31, the relative position between the connecting ring 9 and the propulsion shaft 31 can be locked by the locking pin.

[0034] The side wall of the through hole 13 has a concave straight strip-shaped guide groove along the axial direction, and the number of the guide grooves is several and evenly distributed around the axis of the through hole 13. The outer side of the jumping head 4 has a protruding straight strip-shaped guide portion, which extends into the guide groove and can move back and forth along the guide groove. In this embodiment, the matching structure of the guide groove and the guide portion can be an axial movement guide for the jumping head 4, and a spline structure can be selected for matching as needed.

[0035] The part where the propulsion shaft 31 extends out of the adsorption side 11 of the shell 1 has a protruding annular positioning ring 12, the outer end of the propulsion shaft 31 and the jumping head 4 can pass through the positioning ring 12, and a detection magnet 10 is also fixed in the end cover of the jumping head 4.

[0036] like Figure 3 As shown, a magnetic switch 101 is fixed to the positioning ring 12 of the housing 1. The magnetic switch 101 corresponds to the position of the detection magnet 10 and can detect whether the detection magnet 10 has moved to the corresponding position. A distance detector 7 is provided on the adsorption side 11 of the housing 1 at a position away from the extension of the propulsion shaft 31. The distance detector 7 can detect whether the distance between the barrier provided on the side of the adsorption side 11 of the housing 1 and the housing 1 reaches a set value. Here, the set value can be 1mm-10mm; preferably 4mm.

[0037] like Figure 2 As shown, the distance detector 7 includes a long rod-shaped push rod 71, a switch 72, and a spring 73 connected to the switch 72. One end of the spring 73 is connected to the switch 72, and the other end pops outward under its own elastic force. The inner end of the push rod 71 can abut against the other end of the spring 73, and the outer end of the push rod 71 can extend from the adsorption side 11 of the housing 1. The switch 72 can send a retraction signal when the other end of the spring 73 pops the push rod 71 outward to a set distance. In order to prevent the push rod 71 from being completely ejected, the outer side of the push rod 71 also has a protruding annular shoulder.

[0038] like Figure 5 As shown, the emergency tripping device also includes a controller 6 and a sound detector 8, and the sound detector 8, the distance detector 7, the drive motor 3, and the magnetic switch 101 are all connected to the controller 6. Among them, the sound detector 8 can detect the size of the ambient sound, and the controller 6 can control the drive motor 3 to retract the propulsion shaft 31 when the ambient sound is greater than the set value; in addition, the controller 6 can control the drive motor 3 to retract the propulsion shaft 31 when the distance between the switch cabinet door and the housing 1 as an obstacle increases to a set value, and can control the drive motor 3 to stop working when the magnetic switch 101 detects the detection magnet 10. Here, the ambient sound decibel setting value can be 30 to 80 decibels, preferably 50 decibels.

[0039] When the emergency tripping device is used, the operator attaches the entire housing 1 to the door of the switch cabinet through the adsorption magnet 2, and aligns the positioning ring 12 protruding from the adsorption side 11 of the housing 1 with the tripping button in the switch cabinet, without adjusting the relative distance between the two. Then, the driving motor 3 is started to drive the propulsion shaft 31 to extend axially outward, and the tripping head 4 is ejected outward along with the propulsion shaft 31 under the elastic force of the elastic member 5. Figure 4 As shown, when the outer end of the jumping head 4 moves to the opening button, the opening button is pressed under the elastic force of the elastic member 5 to achieve opening; when the opening button is pressed and the propulsion shaft 31 continues to be pushed outward, the jumping head 4 abuts against the opening button and is blocked by the opening button to compress the elastic member 5, thereby preventing the propulsion shaft 31 from being pushed too far and causing the entire housing 1 to be pushed open.

[0040] When the opening is completed, a beating sound is emitted, and the sound detector 8 detects the sound to determine the opening state and sends a signal to the controller 6 after the opening is completed. The controller 6 controls the propulsion shaft 31 to retract in time to avoid excessive advancement of the propulsion shaft 31.

[0041] After the controller 6 controls the propulsion shaft 31 to retract, the magnetic switch 101 at the positioning ring 12 detects that the detection magnet 10 retracts to the positioning ring 12, and sends a signal to the controller 6, and the controller 6 controls the driving motor 3 to stop working.

[0042] During the process of pushing the propulsion shaft 31 outward, the outer end of the push rod 71 of the distance detector 7 always rests on the switch cabinet door, and the spring piece 73 remains in a compressed state. When the propulsion shaft 31 is pushed out a distance too large and no tripping sound is heard or the sound detector 8 fails, the shell 1 will overcome the magnetic attraction of the adsorption magnet 2 and slip outward. The distance between the adsorption side 11 of the shell 1 and the switch cabinet door continues to increase until it reaches the set value, at which time the spring piece 73 is completely ejected and separated from the switch 72. It is determined that the propulsion shaft 31 is pushed out excessively, causing the shell 1 to be detached from the switch cabinet door and is about to fall off. At this time, the controller 6 receives the signal sent by the switch 72 in the distance detector 7, controls the drive motor 3 to stop pushing out the propulsion shaft 31 and drives the propulsion shaft 31 to retract in the opposite direction, thereby preventing the shell 1 from falling off the switch cabinet door, and effectively protecting the propulsion shaft 31 from excessive advancement.

[0043] The above setting values ​​are only for illustration. The specific numerical settings can be carried out in field tests according to the actual use environment. The indicated values ​​of each critical point are used as reference values, and the appropriate parameter range is selected as the setting value.

[0044] Embodiment 2

[0045] The scheme of this embodiment is roughly the same as that of the first embodiment, except that: the top rod 71 includes a rod body and an adjustment sleeve threadedly connected to the outside of the outer end of the rod body, and the adjustment sleeve is made of insulating material; when in use, the overall axial length of the top rod 71 can be adjusted by rotating the adjustment sleeve, so that the distance detection of the top rod 71 in the same jumping device can be suitable for more different switch cabinet usage requirements; the distance detector 7 can also use an infrared ranging sensor; the elastic member 5 can use elastic fillers such as silicone or rubber.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An emergency tripping device, comprising a housing, an adsorption magnet fixed to the housing, and a drive motor, wherein the drive motor has a propulsion shaft that can move axially and extend out of one side of the housing, and is characterized in that: The outer end of the propulsion shaft is provided with a jumping head, and an elastic member is provided between the jumping head and the propulsion shaft. The jumping head can move in a direction away from the propulsion shaft under the elastic force of the elastic member, and when the jumping head is subjected to an axial force, the elastic member can be compressed and move toward the propulsion shaft. The side of the shell where the outer end of the propulsion shaft extends is the adsorption side. The shell is also connected to a controller and a distance detector, which deviates from the extended position of the propulsion shaft and can detect the distance between the shell and an obstacle on the adsorption side of the shell. The controller can control the drive motor to retract the propulsion shaft when the distance between the obstacle and the shell increases to a set value. The distance detector includes a long rod-shaped push rod, a switch connected to the controller and a spring connected to the switch, the inner end of the push rod can abut against the spring, and the spring can make the outer end of the push rod extend from the adsorption side of the shell under the action of its own elastic force, and the switch can send a retraction signal to the controller when the spring pushes the push rod outward to a set distance, the jumping head is barrel-shaped and one open end is sleeved on the outside of the outer end of the propulsion shaft, the outer side of the outer end of the propulsion shaft is threadedly connected with a ring-shaped connecting ring, the inner wall of the open end of the jumping head has a protruding limiting portion, and the two ends of the elastic member respectively act on the inner side of the closed end of the jumping head and the connecting ring, and the limiting portion can abut against the connecting ring.

2. The emergency tripping device according to claim 1, characterized in that: The shell is also connected to a sound detector capable of detecting the size of ambient sound, and the controller can control the drive motor to retract the propulsion shaft when the ambient sound is greater than a set value.

3. The emergency tripping device according to claim 1, characterized in that: The push rod comprises a rod body and an adjusting sleeve threadedly connected to the outside of the outer end of the rod body, and the adjusting sleeve is made of insulating material.

4. The emergency tripping device according to claim 1 or 2, characterized in that: The distance detector includes an infrared ranging sensor.

5. The emergency tripping device according to claim 1 or 2, characterized in that: A detection magnet is fixed on the beating head, and a magnetic switch is fixed on one side of the shell from which the propulsion shaft extends. The magnetic switch is connected to the controller, and the positions of the magnetic switch and the detection magnet correspond.

6. The emergency tripping device according to claim 5, characterized in that: A protruding annular positioning ring is provided on the side of the shell body at a position where the propulsion shaft extends out, and the outer end of the propulsion shaft can pass through the positioning ring, and the magnetic switch is fixed on the positioning ring.

7. The emergency tripping device according to claim 1 or 2, characterized in that: The shell body is provided with a through hole, and the side wall of the through hole is provided with a straight strip-shaped guide groove along the axial direction. The outer side of the jumping head is provided with a protruding guide part, and the guide part extends into the guide groove.

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