CN111952876A - An integrated handcart device with electric inspection and grounding function - Google Patents

Abstract

The invention discloses an integrated handcart device with electric inspection and grounding functions in the technical field of circuit breaker handcarts. The handcart screw rod, the panel is provided with a grounding switch operation hole, the inner side of the grounding switch operation hole is provided with a grounding switch, the insulating support is provided with a conductive plate and an electrical inspection contact, the panel is provided with a live display, and the live display The inner detection end is electrically connected to the conductive plate through the contact sensor, and the electrical inspection contact is electrically connected to the conductive plate through the height adjustment mechanism; the inner side of the handcart entry and exit operation hole is provided with a ground knife electric inspection mechanism, and a ground knife switch operation hole The inner side is provided with a mechanism for preventing electrification and grounding, and the positions of the electricity detection device and the grounding device of the integrated handcart device of the present invention are reasonably allocated to ensure that the structure is simple, flexible in operation, economical and practical, and in compliance with regulations.

Description

An integrated handcart device with electric inspection and grounding function

technical field

The invention relates to the technical field of handcart equipment for circuit breakers, in particular to an integrated handcart device with electric inspection and grounding functions.

Background technique

With the continuous development of power technology, 6-35kV equipments are generally metal armored cabinets at present. How to directly inspect and ground the busbars and lines of the same voltage level is a major problem that has plagued the operation management unit for a long time. The switchgear busbar or line maintenance inspection and grounding of the switchgear are two independent handcarts, and there are major safety hazards such as lack of perfect electrical and mechanical anti-mislocking function, complicated operation and long time.

The busbar is switched from the cold standby to the overhaul operation. "Use the electric inspection car to inspect the static contact on the side of the PT switch cabinet. After there is no voltage, the grounding car will be pushed to the "connected" position. Enter the "electricity inspection trolley" and open the baffle with an electric inspection pen. The electric inspection process is mainly to use the electric inspection car (valve drive car) to open the static contact baffle of the switch cabinet, and then use an electric inspection pen to conduct electricity inspection on the static contact. . At this time, since the static contacts that may be charged are exposed in front of the operator, it is difficult to ensure the personal safety of the operator during the power inspection process. The "grounded handcart" leads to many on-site operation steps, which is time-consuming and labor-intensive.

Based on this, the present invention designs an integrated handcart device with electric inspection and grounding functions to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the invention is to provide an integrated handcart device with electric inspection and grounding functions to solve the above technical problems.

In order to achieve the above purpose, the invention provides the following technical scheme: an integrated handcart device with an electric inspection and grounding function, comprising a base, a panel and an insulating bracket are respectively provided on the front and rear sides of the base, and a handcart is provided in the middle of the base. Operation hole, the inside of the handcart in and out operation hole is correspondingly provided with a handcart screw rod for controlling the in and out movement of the handcart, the panel is provided with a grounding knife switch operation hole, and the inner side of the grounding knife switch operation hole is driven by a bevel gear set A grounding switch is provided, and the soft copper wire of the grounding switch is connected to the base in a fixed and conductive manner, and the base is reliably grounded through the grounding copper bar of the switchgear cabinet. When the grounding knife switch is closed, it contacts the conductive static contact that is turned on. The conductive plate is electrically connected with three electrical inspection contacts arranged side by side. The panel is provided with a live display. The inner side of the live display detects The terminal is electrically connected with the conductive plate through a touch sensor;

The electric inspection contact is electrically connected with the conductive plate through a height adjustment mechanism; the inner side of the handcart in and out operation hole is provided with an electric inspection mechanism for preventing the knife from being grounded, and the inner side of the operation hole of the grounding knife switch is provided with a knife to prevent the electric ground closing. mechanism.

Preferably, the height adjustment mechanism includes two sliding guide rails which are respectively arranged on the left and right sides of the inner wall of the insulating support, the sliding guide rails on both sides are movably installed with lifting slides through the sliding blocks, and the three electrical inspection contacts are fixedly installed On the lifting slide, the conductive plate is provided with three chutes corresponding to the electrical inspection contacts. connect.

Preferably, a plurality of positioning locking holes are provided at different height positions on the sliding guide rail, and a locking screw capable of cooperating and locking with one of the positioning locking holes is screwed on the sliding block.

Preferably, the electric detection mechanism for the knife against the ground includes a chassis lock plate, the chassis lock plate has a limit handle structure, the bottom of the limit handle structure has a limit tip, and the chassis lock plate It is rotatably installed on the pin shaft of the base. The outer wall of the pin shaft is sleeved with a torsion spring for making the limit handle reset and bounce. The iron core of the electromagnet for preventing the knife-with-ground knife from being stretched out and being blocked above the limit handle also includes an auxiliary switch that is electrically connected to the grounding knife switch in the control circuit of the electromagnet for preventing the knife-with-ground knife for power inspection, The auxiliary switch of the grounding switch is arranged at the grounding switch, and after the grounding switch is closed, the auxiliary switch of the grounding switch drives the auxiliary switch of the grounding switch to disconnect the control loop of the electromagnet for preventing the grounding switch.

Preferably, the electrified ground closing knife mechanism includes a lifting baffle plate disposed inside the grounding knife switch operation hole, and the top of the lifting baffle is hung and connected to the inner side of the panel through a pull-up spring, and the lifting baffle The front of the baffle is provided with a grounding knife operating hole shrapnel, and the top of the grounding knife operating hole shrapnel has a hole structure. Corresponding to the operation hole of the grounding knife switch, the inside of the panel is provided with an electromagnet for preventing the electrification of the ground closing knife. The display contact is connected to the control circuit of the electromagnet for preventing the electrification of the ground closing knife to control the expansion and contraction of the electromagnet for the electrification of the ground closing knife.

Preferably, a closing indicator light and a buzzer are provided on the panel, and the closing indicator light and the buzzer are electrically connected to the live display circuit.

Preferably, an observation window is provided on the panel, and the observation window corresponds to the position of the grounding switch.

Compared with the prior art, the beneficial effects of the invention are:

The electric inspection and grounding function integrated handcart device of the present invention realizes the integration of electric inspection and grounding: the positions of the electric inspection device and the grounding device are reasonably allocated in the same device to ensure simple structure, flexible operation, economical and practical, and compliance with regulations.

Integrity inspection of the electric inspection and grounding function integrated handcart device of the present invention: the sound and light inspection, voice alarm and integrity inspection of the electric inspection device are realized through the contact sensor, the electrified display device and the buzzer.

The electric inspection and grounding function integrated handcart device of the present invention has a height adjustment mechanism: the electric inspection contact can be adjusted to be connected with the conductive plate at different heights through the height adjustment mechanism, so that the device can be in static contact with different heights of different types of cabinets. The contact and cooperation of the head can meet the electric inspection and grounding function of the bus side and the line side, and improve the compatibility of the device.

The handcart device with integrated electric inspection and grounding function of the present invention has an electric inspection mechanism for preventing ground knife: install an electromagnet for preventing ground knife inspection on the handcart, which controls the rotation of the handcart screw, and the auxiliary switch connected in series with the grounding knife switch is installed on the handcart. The contact is connected to the control circuit of the electromagnet for preventing ground knife, and the electromagnet for preventing ground knife is used to lock the screw rod of the handcart, restricting the entry and exit of the handcart, and preventing the trolley from being pushed into the electric inspection when the grounding knife is closed. .

The handcart device with integrated electric inspection and grounding function of the present invention has a mechanism for preventing the electric ground closing knife: install an electromagnet for preventing the electric ground closing knife to control the opening of the ground knife gate on the handcart, and connect the live display contact in series to prevent the electric ground closing. The circuit of the knife electromagnet is used to prevent the ground knife from closing the ground knife electromagnet to block the cover plate of the ground knife operation hole, which can prevent the ground knife from closing under the condition of electrification.

An observation window is arranged on the panel of the handcart device with integrated electric inspection and grounding function. The observation window is opposite to the grounding switch, and the state of the grounding switch can be directly observed through the observation window.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the invention, which are not suitable for ordinary people in the art. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the front structure schematic diagram of the present invention;

Fig. 2 is the internal side structure schematic diagram of the present invention;

3 is a schematic structural diagram of the height adjustment mechanism of the present invention;

Fig. 4 is the structural schematic diagram of the electric inspection mechanism for preventing ground knife according to the present invention;

FIG. 5 is a schematic structural diagram of the mechanism for preventing the electric ground closing knife according to the present invention;

FIG. 6 is a schematic structural diagram of the lock plate of the chassis of the present invention.

In the accompanying drawings, the list of components represented by each number is as follows:

1-base, 2-panel, 3-insulation bracket, 4-handcart screw, 41-handcart screw, 5-grounding switch operation hole, 6-bevel gear set, 7-grounding switch, 8-conductive Board, 81-chute, 82-conductive static contact, 9-electrical inspection contact, 10-live display, 11-contact sensor, 12-height adjustment mechanism, 13-protection against ground knife electric inspection mechanism, 14- The mechanism to prevent the electric ground closing knife, 15-closing indicator light, 16-buzzer, 17-observation window;

121-Sliding guide rail, 122-Slider, 123-Lifting slide plate, 124-Location locking hole, 125-Locking screw;

131- Chassis lock plate, 132- Limit tip, 133- Torsion spring, 134- Anti-knife detection electromagnet, 135- Limit handle;

141-lifting baffle, 142-pulling spring, 143-grounding knife operating hole shrapnel, 144-preventing electrified grounding knife electromagnet.

Detailed ways

The technical solutions in the embodiments of the invention will be clearly and completely described below with reference to the drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the invention.

Please refer to Fig. 1-2, the invention provides a technical solution: an integrated handcart device with electric inspection and grounding function, including a base 1, and a panel 2 and an insulating support 3 are respectively provided on the front and rear sides of the base 1, and the insulating support 3 is used for To install and support the electrical inspection contacts used to connect with the static contacts of the switchgear cabinet during maintenance of the busbar or line, the insulating bracket 3 can be made of epoxy resin material. The epoxy resin material has good dielectric properties and a dielectric loss factor of 20. ℃ is less than 0.5%, 180 ℃ is less than 3%; the paint film has low water absorption, the water absorption rate is about 0.25%, and has the characteristics of good electrical insulation performance, high compressive strength and excellent mechanical properties; the middle of the base 1 is provided with a handcart In and out operation hole 41, the inside of the handcart in and out operation hole 41 is correspondingly provided with a handcart screw 4 for controlling the in and out movement of the handcart, the panel 2 is provided with a grounding knife switch operating hole 5, and the inner side of the grounding knife switch operating hole 5 passes through the bevel gear group 6. The transmission is provided with a grounding switch 7, and the external grounding switch operating handle (not shown in the figure) is inserted into the grounding switch operating hole 5 to rotate, and the grounding switch 7 can be driven by the bevel gear set 6 to close; the grounding switch The soft copper wire of the gate 7 is connected with the base 1 in a fixed conduction, and the base 1 is reliably grounded through the grounding copper bar of the switchgear cabinet. The insulating support 3 is provided with a conductive plate 8, and the conductive plate 8 is capable of closing with the grounding switch 7. When the grounding switch 7 is turned over and closed, it contacts the conductive plate 8 through the static contact, and when the grounding switch is closed, the grounding switch and the static contact on the conductive plate Firm and reliable contact, the line or busbar passes through the static contact on the side of the switch cabinet—electrical inspection contact 9—static contact on the conductive plate 8—grounding switch 7—soft copper wire—chassis (base 1)—switch cabinet The body grounding copper bar is grounded after the grounding, and the conductive plate 8 is electrically connected with three electrical inspection contacts 9 arranged side by side, which are used to contact the static contacts on the side of the switch cabinet for electrical inspection. The panel 2 is provided with a live display 10. The inner detection end of 10 is electrically connected to the conductive plate 8 through the touch sensor 11. The touch sensor 11 converts the three-phase voltage of the busbar or line into a low voltage to provide low voltage for the live display, and the live display 10 displays the maintenance bus or line three. Whether the phase has voltage or not, and connect its contacts in series to prevent the control circuit of the electromagnet from being blocked by the ground closing knife mechanism 14; in addition, the panel 2 is also provided with a secondary plug. After the trolley enters the cabinet, the secondary plug is connected to the cabinet. connected to the socket of the switch, take power from the small bus bar on the top of the cabinet, provide power for the live display, buzzer, locking electromagnet, etc., and connect the secondary circuit, collect the position of the handcart and the position of the grounding switch, and upload them to the status indicator and scheduling system.

The electric inspection contact 9 is electrically connected with the conductive plate 8 through the height adjustment mechanism 12; the inside of the handcart in and out operation hole 41 is provided with the electric inspection mechanism 13 for preventing the knife from being grounded, and the inside of the grounding knife switch operation hole 5 is provided with a knife to prevent the electric ground closing. Agency 14.

Please refer to FIG. 3 , the height adjustment mechanism 12 includes two sliding guide rails 121 respectively disposed on the left and right sides of the inner wall of the insulating support 3 , and the sliding guide rails 121 on both sides are movably installed with lifting slides 123 through the sliders 122 , and three electrical inspection contacts 9 is fixedly installed on the lifting slide 123, and three chutes 81 corresponding to the electrical inspection contacts 9 are opened on the conductive plate 8. The electrical inspection contacts 9 are lifted and adjusted to any adjustable height and are fixed and electrically connected to the chutes 81 through screws. The lift slide 123 is equipped with an electric inspection contact 9, and the bottom of the electric inspection contact 9 is provided with an inner threaded hole, and the width of the chute 81 opened in the middle of the conductive plate 8 is matched with the diameter of the inner threaded hole, and the bolt passes through the conductive plate 8. After the chute 81 is screwed into the inner threaded hole to fix the electrical contact and the conductive plate, due to the different height positions of the static contacts in the switchgear of different types and specifications, the electrical contact 9 can be adjusted to the conductive plate through the height adjustment mechanism 12 8. Connect and conduct at different heights, so that the device can contact and cooperate with static contacts of different heights of different types of cabinets, meet the function of grounding inspection on the bus side and the line side, and improve the compatibility of the device.

Further, a plurality of positioning locking holes 124 are provided at different height positions on the sliding guide rail 121, the sliding block 122 is screwed with a locking screw 125 that can be locked with one of the positioning locking holes 124, and the lifting slide plate 123 is equipped with a tester. The electrical contact 9 and the lifting slide 123 can be moved on the sliding guide rail 121 to adjust the height, and the locking screw 125 can be used.

Please refer to FIGS. 4 and 6 , the ground knife detection mechanism 13 includes a chassis lock plate 131, one end of the chassis lock plate 131 has a limit handle 135, and the bottom of the limit handle 135 has a limit tip 132, the chassis lock The plate 131 is rotatably installed on the pin shaft of the base 1, the outer wall of the pin shaft is sleeved with a torsion spring 133, and the base 1 is provided with an electromagnet 134 for preventing knife detection with ground to prevent the iron core of the electromagnet 134 from extending. After exiting, it is blocked above the limit handle 135, and also includes an auxiliary switch that is electrically connected to the grounding switch in the control loop of the electromagnet 134 for preventing the grounded knife, and the auxiliary switch of the grounding switch is arranged at the grounding switch 7. After the grounding switch 7 is closed, the auxiliary switch that drives the grounding switch disconnects the control loop of the electromagnet 134 to prevent the grounding switch;

To prevent the electric inspection with ground knife, the locking control circuit passes through the small busbar on the top of the cabinet—the secondary plug—the auxiliary switch contact of the grounding knife switch—the electromagnet 134 for preventing the ground knife for electric inspection, controls the extension and contraction of the core of the electromagnet, and the grounding knife switch 7 is closed In this case, the limit handle 135 of the chassis car is blocked by the iron core and cannot be bounced, the limit tip 132 is stuck in the threaded groove of the handcart screw 4, the handcart screw 4 cannot be rotated, and the handcart cannot be pushed into the switch cabinet Electricity inspection is carried out in the cabinet to achieve the purpose of preventing electric inspection with ground knives.

Referring to FIG. 5 , the mechanism 14 for preventing electrification of the ground closing knife includes a lifting baffle 141 arranged inside the grounding knife switch operation hole 5 . The front side of 141 is provided with a grounding knife operating hole shrapnel 143. When the lifting baffle 141 overcomes the elastic force of the pull-up spring 142, the grounding knife operating hole shrapnel 143 opens corresponding to the grounding knife switch operating hole 5, and the inner side of the panel 2 is provided with an anti-energized ground connection. The knife electromagnet 144 prevents the iron core of the electrified ground closing knife electromagnet 144 from being blocked at the bottom of the lifting baffle 141 when it is extended. The control loop of the electrified ground closing knife electromagnet 144 is controlled to prevent electrified closing by connecting the contacts of the electrified display 10 in series to prevent the electrified ground closing knife electromagnet 144. The ground knife electromagnet 144 is retractable;

The control circuit for preventing the electrified ground closing knife from locking is controlled by the small busbar on the top of the cabinet—the secondary plug—the contact point of the electrified display 10—the electrified ground closing knife electromagnet 144, and the iron core of the electrified ground closing knife electromagnet 144 is controlled to expand. When it is confirmed that the static contact of the switch cabinet is powered, the lifting baffle 141 is blocked by the iron core of the electromagnet 144 to prevent the electrification of the grounding knife, the shrapnel 143 of the grounding knife operating hole cannot be pressed down, and the operating handle of the grounding knife cannot be inserted into the grounding knife. Operation hole 5, the grounding knife switch 7 cannot be closed, to achieve the purpose of preventing the electrified grounding knife.

Please refer to Fig. 1, the panel 2 is provided with a closing indicator light 15 and a buzzer 16, the closing indicator light 15 and the buzzer 16 are electrically connected to the circuit of the live display 10, and the electrical inspection circuit is a line or a bus through the switch cabinet. Side static contact—electrical inspection contact 9—conductive plate 8—contact sensor 11—charged display 10. When the electrification is electrified, through the electrification display device 10 and the buzzer 16, the sound and light inspection of the electrification device, Voice alarm and integrity check, the closing indicator light 15 is used to display the opening and closing of the grounding switch 7; the panel 2 is provided with an observation window 17, the observation window 17 corresponds to the position of the grounding switch 7, and the observation window 17 can directly Observing the status of the grounding switch 7, it is convenient, intuitive and accurate to check the position of the grounding switch.

In the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top" The orientation or positional relationship indicated by , "inside", "front", "center", "both ends", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the invention.

In the invention, unless otherwise expressly specified and limited, terms such as "installation", "arrangement", "connection", "fixation" and "screw connection" should be understood in a broad sense, for example, it may be a fixed connection or a It can be a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, Unless otherwise clearly defined, those of ordinary skill in the art can understand the specific meanings of the above terms in the invention according to specific situations.

Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principle and spirit of the invention , the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. An integrated handcart device with an electric inspection and grounding function is characterized in that: comprising a base (1), the front and rear sides of the base (1) are respectively provided with a panel (2) and an insulating support (3), the described base (1) A handcart in and out operation hole (41) is arranged in the middle of the base (1), and a handcart screw (4) for controlling the inward and outward movement of the handcart is correspondingly arranged on the inner side of the handcart in and out operation hole (41). The panel (2) A grounding switch operating hole (5) is provided on the grounding switch, and the inner side of the grounding switch operating hole (5) is provided with a grounding switch (7) driven by a bevel gear group (6), and the soft copper wire of the grounding switch (7) The base (1) is securely connected to the base (1), the base (1) is reliably grounded through the grounding copper bar of the switchgear cabinet, the insulating support (3) is provided with a conductive plate (8), and the conductive plate (8) has a A conductive static contact (82) that can be in contact with the grounding switch (7) when it is closed, and three electrical inspection contacts (9) arranged side by side are electrically connected to the conductive plate (8). A charged display (10) is provided on the panel (2), and an inner detection end of the charged display (10) is electrically connected to the conductive plate (8) through a touch sensor (11); The electric inspection contact (9) is electrically connected with the conductive plate (8) through the height adjustment mechanism (12); the inner side of the handcart in and out operation hole (41) is provided with a ground knife electric inspection mechanism (13), The inside of the grounding knife switch operating hole (5) is provided with a mechanism (14) for preventing electrified grounding. 2. A kind of handcart device with integrated electric testing and grounding function according to claim 1, characterized in that: the height adjustment mechanism (12) comprises two sliding slides that are respectively arranged on the left and right sides of the inner wall of the insulating support (3) Guide rails (121), on the sliding guide rails (121) on both sides, a lifting slide plate (123) is movably installed by means of sliders (122), and the three said electrical inspection contacts (9) are fixedly installed on the lifting slide plate (123) ), the conductive plate (8) is provided with three chutes (81) corresponding to the electrical inspection contacts (9), and the electrical inspection contacts (9) are lifted and adjusted to any adjustable height and passed through The screw is fixed and electrically connected to the sliding slot (81). 3. A kind of handcart device with integrated electric inspection and grounding function according to claim 2, characterized in that: several positioning locking holes (124) are provided at different height positions on the sliding guide rail (121), and the The sliding block (122) is screwed with a locking screw (125) that can cooperate and lock with one of the positioning locking holes (124). 4. A handcart device with integrated electric inspection and grounding function according to claim 1, characterized in that: the electric inspection mechanism (13) for preventing the knife from taking the ground comprises a chassis car lock plate (131), and the chassis car The lock plate (131) is provided with a limit handle (135) structure, the bottom of the limit handle (135) structure has a limit tip (132), and the chassis lock plate (131) is rotatably mounted on the base ( 1) on the pin shaft, the outer wall of the pin shaft is sleeved with a torsion spring (133), and the base (1) is provided with an electromagnet (134) for preventing the electric inspection of the knife with the ground. The iron core of the electromagnet (134) protrudes and blocks above the limit tip (132), and further comprises a grounding knife switch electrically connected to the grounding knife switch in the control loop of the grounding knife prevention electromagnet (134). Auxiliary switch, the auxiliary switch of the grounding switch is arranged at the grounding switch (7), and after the grounding switch (7) is closed, the auxiliary switch of the grounding switch is turned off to prevent the grounded switch from being checked. Control loop for the electromagnet (134). 5. An integrated handcart device for electric inspection and grounding function according to claim 1, characterized in that: the mechanism (14) for preventing the electric ground closing knife comprises being arranged on the inside of the operating hole (5) of the grounding knife switch The lift baffle (141) is connected to the inner side of the panel (2) through a pull-up spring (142) at the top, and the front of the lift baffle (141) is provided with grounding The knife operating hole spring piece (143) has a hole structure above the grounding knife operating hole spring piece. The operating hole (5) of the grounding knife switch is opened, and the inner side of the panel (2) is provided with an electromagnet (144) for preventing the electrification of the ground closing knife, and the iron core of the electromagnet (144) for preventing the electrification of the ground closing knife is blocked when it extends out. At the bottom of the lift baffle (141), the contact of the electrification indicator (10) is connected in series to the control loop of the electrified ground closing knife electromagnet (144) to control the expansion and contraction of the electrified ground closing knife electromagnet (144). . 6. A handcart device with an integrated electric inspection and grounding function according to claim 1, characterized in that: said panel (2) is provided with a closing indicator light (15) and a buzzer (16), so that The closing indicator light (15) and the buzzer (16) are electrically connected to the circuit of the live display (10). 7. A handcart device with integrated electric inspection and grounding function according to claim 1, characterized in that: an observation window (17) is provided on the panel (2), and the observation window (17) is connected to the The position of the grounding switch (7) corresponds.

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