CN217406034U - Valve opening and closing mechanism and high-voltage switch cabinet comprising same - Google Patents

Abstract

The utility model discloses a valve operating mechanism reaches high tension switchgear including it. The valve opening and closing mechanism comprises a left optical axis, a right optical axis, an upper valve, a lower valve and a linkage mechanism for driving the upper valve and the lower valve to open simultaneously, the weight of the upper valve is larger than that of the lower valve, the linkage mechanism comprises a lower valve power unit, a traction wheel and a traction chain, the traction wheel is fixed above the upper valve, the two ends of the traction chain are respectively connected with the upper valve and the lower valve, the traction wheel is wound in the middle, when the lower valve power unit drives the lower valve to move downwards, the upper valve is driven by the traction chain to move upwards, the opening action of the upper valve and the lower valve is realized, and after the power of the lower valve power unit is relieved, the upper valve depends on the self weight to realize the closing action of the upper valve and the lower valve. The utility model discloses it is single armed one-way mechanism to be revised as the two-way structure of opening and close of current both arms to utilize valve self gravity to reset, simple structure opens and close smoothly reliably, ensures the safe operation of electric wire netting equipment greatly.

Description

Shutter opening and closing mechanism and high-voltage switch cabinet comprising same

Technical Field

The utility model relates to a high tension switchgear technical field especially relates to a valve starting and stopping mechanism reaches high tension switchgear including it.

Background

The high-voltage switch cabinet is opened, closed, controlled and protected by electric equipment in the process of generating, transmitting, distributing and converting electric energy of an electric power system. At present, due to mature technology, simple operation and excellent electrical insulation of the KYN28 and other centrally-mounted switch cabinets, the centrally-mounted switch cabinets are widely applied to various different occasions such as various power plants, transformer substations, industrial and mining enterprises and the like.

The valve opening and closing mechanism is used as a core mechanism for isolating high voltage during switch cabinet maintenance and power failure, so that electric shock of operators can be effectively avoided, and personal and property safety is effectively guaranteed. The existing valve opening and closing mechanism is shown in figure 1, and an 'Contraband' -shaped flange extrusion piece fixed on a handcart of a middle breaker extrudes an upper valve shaft and a lower valve shaft, so that the lower valve shaft 21 rotates clockwise, the upper valve shaft 11 rotates anticlockwise, the lower valve 2 moves downwards, the upper valve 1 moves upwards, a contact is exposed, and the breaker is accessed. When power is off and maintenance is carried out, the breaker handcart is withdrawn, and the upper valve and the lower valve are closed. The existing valve opening and closing mechanism opens the upper and lower valves by means of the clamping grooves on two sides of the circuit breaker handcart, and then closes the upper and lower valves by means of the return spring. The existing valve opening and closing mechanism has the following problems: 1. the structure is complicated, the number of parts is large, the phenomenon of mechanism clamping stagnation or mechanism adjustment not in place is easy to occur, the balance adjustment is difficult, the condition that the opening distance of the valve is not enough or the valve cannot be completely opened is easy to occur, and insulation accidents are caused. In recent years, there have been many accidents of equipment and personal safety caused by the valve problem. 2. Adopt spring reset to set up, because there is the risk of spring plastic deformation spring reset, the valve will unable self-closing after warping, has the personal safety risk.

Therefore, the above-mentioned conventional shutter opening/closing mechanism still has inconvenience and defects in structure and use, and needs to be further improved. How can establish a new valve opening and closing mechanism and include its high tension switchgear, make it utilize single armed unidirectional touching to realize opening of upper and lower valve to utilize valve self gravity to reset and close, simple structure opens and close smoothly not the jam, promotes safe and reliable performance greatly.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a valve starting and stopping mechanism, make it utilize the one-way touching of single armed to realize opening of lower valve to utilize valve self gravity to reset and close, simple structure opens and close smoothly not bite, promote the safe and reliable performance greatly, thereby overcome current valve starting and stopping mechanism's not enough.

In order to solve the technical problem, the utility model provides a valve opening and closing mechanism, which comprises a left optical axis, a right optical axis, an upper valve and a lower valve which are arranged on the left optical axis and the right optical axis in a sliding way, and a linkage mechanism for driving the upper valve and the lower valve to be opened simultaneously, wherein the weight of the upper valve is larger than that of the lower valve, the linkage mechanism comprises a lower valve power unit, a traction wheel and a traction chain, the traction wheel is fixed above the upper valve, one end of the traction chain is connected with the upper valve, the other end is connected with the lower valve, the middle of the traction chain winds around the traction wheel, when the lower valve power unit drives the lower valve to move downwards, the traction chain drives the upper valve to move upwards to realize the opening action of the upper valve and the lower valve, and after the power of the lower valve power unit is relieved, the upper valve moves downwards by means of the weight of the upper valve, and the lower valve is driven to move upwards by the traction chain, so that the closing action of the upper valve and the lower valve is realized.

The improved structure of the lower valve power unit is characterized in that the lower valve power unit comprises a lower valve connecting arm, a lower valve rotating arm, a rotating shaft and a fixing plate, the lower valve rotating arm adopts a 7-shaped arm, the short arm end of the 7-shaped arm is connected with the rotating shaft in a rotating mode, the long arm end of the 7-shaped arm is hinged to the lower end of the lower valve connecting arm, the upper end of the lower valve connecting arm is hinged to the lower valve, the other end of the rotating shaft is fixedly connected with the fixing plate, a power bulge is further arranged on the side portion of the 7-shaped arm and drives the 7-shaped arm to rotate clockwise around the rotating shaft under the action of a circuit breaker trolley extrusion piece, and then the lower valve connecting arm drives the lower valve to move downwards.

The power protrusion is of a trapezoid block structure with a slope, and the upper slope surface and the upper surface of the trapezoid block structure are in contact with a circuit breaker trolley extrusion piece.

In a further improvement, the upper slope surface and the upper surface of the trapezoid block structure are provided with needle type idler wheels.

The valve opening and closing mechanism comprises two linkage mechanisms, the two linkage mechanisms are respectively arranged at two end parts of the upper valve and the lower valve, traction wheels of the two linkage mechanisms are respectively fixed at the upper parts of the left optical axis and the right optical axis, two traction chains are respectively connected with two end parts of the upper valve and the lower valve, and two power units of the lower valve are respectively connected with two end parts of the lower valve and act synchronously.

In a further improvement, the left optical axis and the right optical axis both adopt hard optical axes.

In a further improvement, the upper part and the lower part of the left optical axis and the right optical axis are respectively provided with an upper stop block and a lower stop block.

As another improvement of the utility model, the utility model also provides a high tension switchgear, this high tension switchgear includes foretell valve opening and closing mechanism.

After adopting such design, the utility model discloses following advantage has at least:

1. the utility model discloses valve starting and stopping mechanism improves on original valve starting and stopping mechanism's basis, and two-way starting and stopping structure of both arms will have now is revised as single armed one-way mechanism, only when link gear and circuit breaker dolly interact, opens upper and lower valve, when shaking out the circuit breaker dolly, goes up the valve and utilizes self gravity to reset, because its weight is greater than lower valve weight simultaneously, and then drives down the valve and shifts up, and the valve is closed about realizing. The valve opening and closing mechanism is simple and reliable in structure, the number of parts is half that of the original mechanism system, and meanwhile, the original reset spring is eliminated, so that the defects of the original valve mechanism are completely eradicated, and the safe operation of the power grid equipment is guaranteed.

2. Still through the setting of the trapezoidal piece protruding structure of taking the slope in the link gear to and the setting of pin type gyro wheel, further promoted the smooth and easy effect of link gear and circuit breaker dolly, very big reduction the possibility of valve starting and stopping mechanism jam, the security improves greatly.

Drawings

The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

Fig. 1 is a schematic structural view of a conventional shutter opening and closing mechanism.

Fig. 2 is a schematic structural diagram of the shutter opening and closing mechanism of the present invention.

Detailed Description

Referring to fig. 2, the valve opening and closing mechanism of the present embodiment includes a left optical axis 3, a right optical axis 4, an upper valve 1 and a lower valve 2 slidably disposed on the left optical axis 3 and the right optical axis 4, and a linkage mechanism for driving the upper valve 1 and the lower valve 2 to open simultaneously. And the left optical axis 3 and the right optical axis 4 both adopt M8 hard optical axes, and an upper valve and a lower valve slide up and down through a linear slide block. The weight of the upper shutter 1 is greater than that of the lower shutter 2.

In this embodiment, the valve opening and closing mechanism includes two linkage mechanisms respectively disposed at two ends of the upper valve 1 and the lower valve 2, and the two linkage mechanisms act synchronously.

Specifically, the linkage mechanism comprises a lower valve power unit 5, a traction wheel 6 and a traction chain 7, wherein the traction wheel 6 is fixed above the upper valve and can be directly fixed on the upper part of the optical axis. One end of the traction chain 7 is connected with the upper valve 1, the other end of the traction chain is connected with the lower valve 2, and the middle of the traction chain 7 winds around the traction wheel 6, so that when the lower valve power unit 5 drives the lower valve 2 to move downwards, the traction chain 7 can drive the upper valve 1 to move upwards, and the opening action of the upper valve 1 and the lower valve 2 is realized. After the power of the lower valve power unit 5 is released, the upper valve 1 moves downwards by means of the self weight, and meanwhile, the lower valve 2 is driven to move upwards through the traction chain 7, so that the closing action of the upper valve 1 and the lower valve 2 is realized. As shown in fig. 2, the left side shows the connection relationship between the traction wheel 6 and the traction chain 7 and the upper shutter 1 and the lower shutter 2, and the right side does not show the traction chain 7.

More specifically, lower valve power unit 5 includes lower valve linking arm 51, lower valve swinging arm 52, axis of rotation 53 and fixed plate 54, lower valve swinging arm 52 adopts 7 style of calligraphy arms, the short arm end of 7 style of calligraphy arms with axis of rotation 53 rotates and connects, the long arm end of 7 style of calligraphy arms with lower valve linking arm 51's lower extreme hinge, lower valve linking arm 51's upper end with lower valve 2 hinge, the axis of rotation 53 other end with fixed plate 54 fixed connection, fixed plate 54 and other part fixed connection of cubical switchboard. The lateral part of the 7-shaped arm is also provided with a power protrusion 55, the power protrusion 55 drives the 7-shaped arm to rotate clockwise around the rotating shaft 53 under the action of an extrusion piece of the breaker trolley, and then the lower valve 2 is driven to move downwards through the lower valve connecting arm 51.

In a preferred embodiment, the power protrusion 55 is a trapezoid block structure with a slope, and the upper slope surface and the upper surface of the trapezoid block structure are in contact with the circuit breaker trolley extrusion piece. And the upper slope surface and the upper surface of the trapezoid block structure are respectively provided with a needle type roller 56, so that the smooth contact between the power bulge 55 and a breaker trolley extrusion part is facilitated, and the blockage caused by opening the valve is avoided. Of course, the lower valve power unit 5 may also adopt other existing power units, and the lower valve is driven to slide downwards.

In this embodiment, the upper portions of the left optical axis 3 and the right optical axis 4 are both provided with an upper stop 8, and the lower portions of the left optical axis 3 and the right optical axis 4 are both provided with a lower stop 9, which are respectively used for limiting the upward moving distance of the upper valve 1 and the downward moving distance of the lower valve 2.

The valve opening and closing mechanism is applied to the high-voltage switch cabinet, and the smooth opening and closing of the upper valve and the lower valve can be ensured by utilizing the action of the valve opening and closing mechanism and the breaker trolley, so that the safety of the high-voltage switch cabinet is improved, and the safe operation of power grid equipment is ensured.

The utility model discloses valve starting and stopping mechanism is not changing under the prerequisite of putting the cabinet design in, improves starting and stopping mechanism for single armed check valve mechanism, when the circuit breaker dolly waved from experimental position and entered into operating position, put the power arch on the valve swinging boom under the extrusion of fixed "Contraband" shape flange extrusion spare on the circuit breaker handcart for valve swinging boom clockwise rotation drives down valve under the valve connecting arm pull down, thereby makes down the valve move down. And the upper valve is driven to move upwards by the traction chain and the traction wheel, so that the valve mechanism is opened. When the breaker trolley is shaken out from the working position and retreats to the testing position, the upper valve resets by self gravity because the weight of the upper valve is heavier than that of the lower valve, and the upper valve and the lower valve are closed.

The utility model discloses valve opening and closing mechanism has simplified the quantity of original middle-placed cabinet valve mechanism spare part, has cancelled the spring, changes former both arms two-way into single armed unidirectional type, reasonable in design, still greatly reduced the possibility of mechanism's jam to even circuit breaker dolly skew, also can open the valve smoothly and close safely.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.

Claims (8)

1. A valve opening and closing mechanism is characterized by comprising a left optical axis, a right optical axis, an upper valve and a lower valve which are arranged on the left optical axis and the right optical axis in a sliding manner, and a linkage mechanism for driving the upper valve and the lower valve to be opened simultaneously, wherein the weight of the upper valve is larger than that of the lower valve, the linkage mechanism comprises a lower valve power unit, a traction wheel and a traction chain, the traction wheel is fixed above the upper valve, one end of the traction chain is connected with the upper valve, the other end of the traction chain is connected with the lower valve, the traction wheel is wound in the middle of the traction chain, when the lower valve power unit drives the lower valve to move downwards, the upper valve is driven to move upwards through the traction chain, the opening action of the upper valve and the lower valve is realized, and after the power of the lower valve power unit is relieved, the upper valve moves downwards by means of the weight of the upper valve, meanwhile, the lower valve is driven to move upwards through the traction chain, so that the closing action of the upper valve and the lower valve is realized.

2. The shutter opening and closing mechanism according to claim 1, wherein the lower shutter power unit comprises a lower shutter connecting arm, a lower shutter rotating arm, a rotating shaft and a fixing plate, the lower shutter rotating arm adopts a 7-shaped arm, the short arm end of the 7-shaped arm is rotatably connected with the rotating shaft, the long arm end of the 7-shaped arm is hinged with the lower end of the lower shutter connecting arm, the upper end of the lower shutter connecting arm is hinged with the lower shutter, the other end of the rotating shaft is fixedly connected with the fixing plate, a power bulge is further arranged on the side portion of the 7-shaped arm, and the power bulge drives the 7-shaped arm to rotate clockwise around the rotating shaft under the action of a breaker trolley extrusion piece, so that the lower shutter moves downwards through the lower shutter connecting arm.

3. The shutter opening and closing mechanism according to claim 2, wherein the power protrusion is of a trapezoidal block structure with a slope, and an upper slope surface and an upper surface of the trapezoidal block structure are in contact with a circuit breaker trolley extrusion piece.

4. The shutter opening and closing mechanism according to claim 3, wherein the upper slope and the upper surface of the trapezoid block structure are provided with needle rollers.

5. A valve opening and closing mechanism according to any one of claims 1 to 4, wherein the valve opening and closing mechanism comprises two linkage mechanisms, the two linkage mechanisms are respectively arranged at two end parts of the upper valve and the lower valve, traction wheels of the two linkage mechanisms are respectively fixed at the upper parts of the left optical axis and the right optical axis, two traction chains are respectively connected with two end parts of the upper valve and the lower valve, two lower valve power units are respectively connected with two end parts of the lower valve, and the two linkage mechanisms act synchronously.

6. A shutter opening and closing mechanism according to claim 5, wherein the left and right optical axes are hard optical axes.

7. A shutter opening and closing mechanism according to claim 5, wherein upper and lower stoppers are provided on upper and lower portions of the left and right optical axes, respectively.

8. A high-voltage switch cabinet, characterized by comprising a shutter opening and closing mechanism according to any one of claims 1 to 7.

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