PT isolating switch for gas insulated switchgear

Abstract

The utility model discloses a PT (potential transformer) isolating switch for a gas insulated switchgear, a copper bar is connected below a current transformer, and a contact is arranged on the bottom surface of the copper bar; an inner conical sleeve is installed in the control chamber, a bearing block is installed above the inner conical sleeve, contact arms are connected to the two sides of the bearing block in a hinged mode, a protruding head used for making contact with a contact is arranged at one end of each contact arm, and a linkage mechanism is arranged between the contact arms and used for pushing the contact arms to rotate, pulling the movable shaft and changing the position of the long rod. The long rod drives the connecting arm to rotate, that is, the positions of the swing arm and the contact arm are synchronously changed, and finally the contact arm realizes switching-on and switching-off operations. The adaptability and the flexibility of the mechanism are enhanced, labor-saving operation of personnel is facilitated, the arc-shaped connecting arm can more effectively utilize space, especially under the condition that other mechanisms or components need to be bypassed, the arc-shaped connecting arm can better bear force and torque from other components, and the strength and the durability of the arc-shaped connecting arm are further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of the gas-filled cabinet, and particularly relates to a PT disconnecting switch for a gas-filled cabinet. BACKGROUND

[0002] The gas-filled cabinet is an indoor alternating-current high-voltage gas-insulated metal-enclosed switchgear, which adopts the design of combining air insulation with SF6 gas compartment, and seals high-voltage components (such as busbars, circuit breakers, disconnecting switches, and transformers) in a shell with a relatively low air pressure, and is used for distributing high-voltage switch cabinets for various insulation devices. The cabinet structure is usually made of 3-5 mm thick stainless steel plates through numerical control machine tool processing and welding robot welding, so as to ensure less welding deformation and good air tightness.

[0003] In the field of power distribution and protection of the railway system, the traditional high-voltage switch equipment often faces complex operation, and cannot be operated labor-savingly when the staff closes and opens the switch, and the whole mechanism occupies a large space, so a larger gas-filled cabinet needs to be set, which greatly increases the occupied area of the whole control system. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a PT disconnecting switch for a gas-filled cabinet to solve the problems of labor-saving and mechanism space occupation in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A PT disconnecting switch for a gas-filled cabinet, comprising a control chamber inside the gas-filled cabinet, wherein a vacuum circuit breaker is installed inside the control chamber, an output end of the vacuum circuit breaker is provided with a pole, a current transformer is connected to the output end of the pole through a copper bar, a copper bar is connected below the current transformer, and a contact head is arranged on the bottom surface of the copper bar.

[0007] An inner tapered sleeve is installed inside the control chamber, a bearing block is installed above the inner tapered sleeve, contact arms are hingedly connected on both sides of the bearing block, a protruding head for contacting the contact head is arranged on one end of the contact arm, and a linkage mechanism is arranged between the contact arms, wherein the linkage mechanism is used for pushing the contact arm to rotate.

[0008] Further, the linkage mechanism comprises a push plate, the push plate is installed between the contact arms, a swing arm is hingedly connected below the push plate, a connecting arm is hingedly connected to one end of the swing arm, an installation plate is installed inside the control chamber, a track is formed on the surface of the installation plate, a positioning block is installed on the inner side of the installation plate, a movable shaft is movably connected inside the positioning block, a cutout is formed on one end of the movable shaft, one end of the connecting arm is installed on the cutout, an elliptical groove is formed on the cutout, and a long rod passes through the elliptical groove, the connecting arm, and the track.

[0009] Further, a threaded hole is formed in the movable shaft. A screw rod is connected to the inside of the movable shaft. By rotating the screw rod, the screw rod and the threaded hole formed in the inside of the movable shaft are engaged with each other, so that the position of the movable shaft on the positioning block can be accurately adjusted, and the closing and opening states of the contact arm are controlled.

[0010] Further, pulleys are installed at both ends of the long rod, and the track is in an arc structure, and the pulleys act on the track. The contact between the pulley and the track is rolling friction, which has smaller resistance than sliding friction, can significantly reduce the friction and wear of the long rod during movement, and prolong the service life of the mechanism.

[0011] Further, the connecting arm is in an arc structure. By adopting the arc design, it can be ensured that the connecting arm will not interfere with other components during movement, thereby improving the compactness and efficiency of the entire mechanism.

[0012] The technical scheme of the utility model has the following beneficial effects:

[0013] 1. Pull the movable shaft to change the position of the long rod, and the long rod drives the connecting arm to rotate, that is, the positions of the swing arm and the contact arm are changed synchronously, and finally the contact arm realizes the closing and opening operation. The adaptability and flexibility of the mechanism are enhanced, and personnel labor-saving operation is facilitated.

[0014] 2. The arc-shaped connecting arm can more effectively utilize space, especially in the case of needing to bypass other mechanisms or components, and make it better withstand forces and torques from other components, further improving its strength and durability. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0016] Figure 1 It is a schematic view of the overall structure of the utility model.

[0017] Figure 2 It is an enlarged view of A of the utility model.

[0018] Figure 3 It is a schematic view of the linkage mechanism of the utility model.

[0019] Figure 4 It is a sectional structure view of the linkage mechanism of the utility model.

[0020] Figure 5 It is a schematic view of the mounting plate mechanism of the utility model.

[0021] 10, control room; 11, vacuum circuit breaker; 12, pole column; 13, current transformer; 14, copper bar; 15, contact; 20, inner conical sleeve; 21, bearing block; 22, contact arm; 23, protruding head; 24, push plate; 25, swing arm; 26, connecting arm; 27, mounting plate; 28, positioning block; 29, track; 30, movable shaft; 31, cutout; 32, long rod; 33, pulley; 34, oval groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in further detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model. Based on the examples in the utility model, all other examples obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Example one:

[0024] Reference Figure 1 And Figure 2 A PT disconnecting switch for an air-filled cabinet, comprising a control room 10 inside the air-filled cabinet, a vacuum circuit breaker 11 is installed inside the control room 10, a pole column 12 is installed at the output end of the vacuum circuit breaker 11, a current transformer 13 is connected to the output end of the pole column 12 through a copper bar, and a copper bar 14 is connected below the current transformer 13.

[0025] In the above scheme, the pole column 12 undertakes the important task of conducting electricity and transmitting current. In the working process of the vacuum circuit breaker 11, the current will pass through the pole column 12, enter the inside of the shell of the vacuum circuit breaker 11, and work in a vacuum environment, thereby playing the function of isolating and disconnecting the circuit; the pole column 12 transmits the current to the current transformer 13 and the copper bar 14 below the current transformer 13 through the copper bar 14.

[0026] Reference Figure 2 And Figure 3 The bottom surface of the copper bar 14 is provided with a contact 15, an inner conical sleeve 20 is installed inside the control room 10, a bearing block 21 is installed above the inner conical sleeve 20, contact arms 22 are hingedly connected on both sides of the bearing block 21, and the contact arms 22 are provided with protruding heads 23 at one end for contacting the contact 15.

[0027] In the above scheme, when the contact arm 22 is in contact with the copper bar 14 below the current transformer 13, the contact arm 22 is pushed upwards, and the contact arm 22 is provided with two protruding heads 23, one end of which is provided with a rounded corner, and the two protruding heads 23 correspond to each other. The contact head 15 is between the two contact arms 22, and the protruding head 23 can be easily clamped on the contact head 15, which increases the stability of the contact and reduces the risk of poor contact or damage to the contact head 15 due to improper operation. The upwardly pushed contact arm 22 can make the protruding head 23 on the contact arm 22 clamp on the contact head 15 to complete the on-off operation of the circuit.

[0028] Reference Figure 2-Figure 5 A linkage mechanism is provided between the contact arms 22, which is used to push the contact arm 22 to rotate. The linkage mechanism includes a push plate 24 installed between the contact arms 22, a swing arm 25 hingedly connected below the push plate 24, a connecting arm 26 hingedly connected at one end of the swing arm 25, an installation plate 27 installed in the control chamber 10, a track 29 provided on the surface of the installation plate 27, a positioning block 28 installed on the inside of the installation plate 27, an active shaft 30 movably connected inside the positioning block 28, a notch 31 provided at one end of the active shaft 30, one end of the connecting arm 26 installed in the notch 31, an elliptical groove 34 provided through the notch 31, and a long rod 32 provided through the elliptical groove 34, the connecting arm 26 and the track 29.

[0029] In the above scheme, the active shaft 30 is movably connected in the positioning block 28, and the positioning block 28 is used to limit the installation position of the active shaft 30. The active shaft 30 can slide back and forth inside the positioning block 28. One end of the connecting arm 26 is inserted into the notch 31 at one end of the active shaft 30. The long rod 32 is passed through the track 29 on the installation plate 27 to limit the long rod 32 in the track 29, and the long rod 32 passes through the connecting arm 26. By pulling the active shaft 30, the position of the long rod 32 is changed, and the long rod 32 drives the connecting arm 26 to rotate, that is, the positions of the swing arm 25 and the contact arm 22 are changed synchronously, and finally the contact arm 22 realizes the closing and closing operation. The adaptability and flexibility of the mechanism are enhanced, and the personnel labor-saving operation is facilitated.

[0030] Further reference Figure 4 A threaded hole is provided in the active shaft 30. A screw rod is connected in the active shaft 30. By rotating the screw rod, the screw rod and the threaded hole provided in the active shaft 30 are engaged with each other, so that the position of the active shaft 30 on the positioning block 28 can be accurately adjusted, and the closing and closing states of the contact arm 22 are controlled.

[0031] Further reference Figure 3 And Figure 5The long rod 32 is provided with pulleys 33 at both ends, and the track 29 is in an arc structure, and the pulleys 33 act on the track 29. The contact between the pulleys 33 and the track 29 is rolling friction, which is smaller than sliding friction, can significantly reduce the friction and wear of the long rod 32 during movement, and prolong the service life of the mechanism. The rolling movement of the pulleys 33 on the arc track 29 can keep the long rod 32 moving stably, avoiding bumping or jamming due to uneven friction or uneven track 29, thereby improving the running stability of the mechanism. The arc track 29 provides a clear guide for the pulleys 33, so that the long rod 32 can keep the predetermined path and direction during movement, avoiding errors or failures due to deviation or misplacement.

[0032] Further reference Figure 4 The connecting arm 26 is provided in an arc structure. The arc-shaped connecting arm 26 can more effectively utilize space, especially when it is necessary to bypass other mechanisms or components. By adopting an arc-shaped design, it can be ensured that the connecting arm 26 will not interfere with other components during movement, thereby improving the compactness and efficiency of the entire mechanism. The structural design of the arc-shaped connecting arm 26 can make it better withstand forces and torques from other components, further improving its strength and durability.

[0033] The specific implementation process of the utility model is as follows:

[0034] By rotating the screw rod, the screw rod and the threaded hole inside the movable shaft 30 are engaged with each other, the position of the movable shaft 30 on the positioning block 28 is adjusted, that is, the position of the long rod 32 is changed, the long rod 32 drives the connecting arm 26 to rotate, that is, the positions of the swing arm 25 and the contact arm 22 are changed synchronously, and finally the protruding head 23 on the contact arm 22 is clamped on the contact 15 to realize the operation of closing and closing.

[0035] The above examples are only exemplary embodiments of the utility model and are not used to limit the utility model, and the protection scope of the utility model is defined by the claims. Various modifications or equivalent replacements can be made to the utility model within the spirit and protection scope of the utility model. Such modifications or equivalent replacements should also be considered to fall within the protection scope of the utility model.

[0036] In the description of the utility model, it is pointed out that the directions or position relationships indicated by the terms "in", "front", "back", "left", "right" and the like are based on the directions or position relationships shown in the drawings or the directions or position relationships commonly used when the utility model product is used, and are only used to facilitate the description of the utility model and simplify the face description, and do not indicate or imply that the indicated devices or elements must have a specific direction, be constructed and operated in a specific direction. Therefore, these terms indicating the direction or position relationship should not be understood as a limitation on the utility model.

[0037] In the description of the utility model, need further explain, unless another explicit provision and limitation. The term "arrangement", "connection" should be broad understanding, for example, these terms can express element between fixed connection, detachable connection or integral connection;It can also express mechanical connection, electrical connection;Also can make express direct connection or through the intermediate medium indirect connection. For ordinary skilled person in the art, can understand these terms in the utility model according to specific circumstances concrete meaning.

Claims

1. A PT isolating switch for an inflatable cabinet, characterized by: The invention comprises a control room (10) inside the gas filling cabinet, wherein a vacuum circuit breaker (11) is installed inside the control room (10), a pole (12) is installed at the output end of the vacuum circuit breaker (11), the output end of the pole (12) is connected to a current transformer (13) through a copper busbar, a copper busbar (14) is connected below the current transformer (13), and a contact (15) is provided on the bottom surface of the copper busbar (14); An inner cone sleeve (20) is installed inside the control chamber (10), a bearing block (21) is installed above the inner cone sleeve (20), and contact arms (22) are hingedly connected on both sides of the bearing block (21), and a protruding head (23) for contacting the contact (15) is provided at one end of the contact arm (22), and a linkage mechanism is provided between the contact arms (22), and the linkage mechanism is used to drive the contact arm (22) to rotate.

2. The PT isolating switch for an inflatable cabinet according to claim 1, characterized in that: The linkage mechanism includes a push plate (24), which is installed between the contact arms (22). A swing arm (25) is hingedly connected to the bottom of the push plate (24), and one end of the swing arm (25) is hingedly connected to a connecting arm (26). A mounting plate (27) is installed in the control chamber (10), and a track (29) is provided on the surface of the mounting plate (27). A positioning block (28) is installed on the inner side of the top of the mounting plate (27). A movable shaft (30) is movably connected to the positioning block (28). A notch (31) is provided at one end of the movable shaft (30). One end of the connecting arm (26) is installed on the notch (31), and an elliptical groove (34) is provided through the notch (31). A long rod (32) passes through the elliptical groove (34), the connecting arm (26) and the track (29).

3. The PT isolating switch for an inflatable cabinet according to claim 2, characterized in that: A threaded hole is provided inside the movable shaft (30).

4. The PT isolating switch for an inflatable cabinet according to claim 3, characterized in that: Pulleys (33) are installed at both ends of the long rod (32), and the track (29) is an arc-shaped structure, and the pulleys (33) act on the track (29).

5. The PT isolating switch for an inflatable cabinet according to claim 4, characterized in that: The connecting arm (26) is arranged in an arc-shaped structure.

Images