CN214586571U

CN214586571U - Adopt glass sintering mode SF6 density controller of bimetallic strip structure

Info

Publication number: CN214586571U
Application number: CN202120901394.3U
Authority: CN
Inventors: 王永军; 颜晓雯
Original assignee: Xi'an Gongchuang Electric Power Technology Co ltd; Henan Pinggao Electric Co Ltd
Current assignee: Xi'an Gongchuang Electric Power Technology Co ltd; Henan Pinggao Electric Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-02
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a glass sintering mode SF6 density controller adopting a bimetallic strip structure, which comprises a movement, a spring tube, a watchcase, a pointer, a glass sintering part, a spring body, a damper, a strain sensor, a bimetallic strip, a junction box and a dial plate, wherein one end of the spring body extends into the watchcase, one side of the outer part of the watchcase is provided with the glass sintering part welded with the watchcase, the movement connected with one end of the spring body is arranged in the watchcase, and the pointer is arranged on the movement; the spring body is provided with a spring pipe, and the lower side of the spring body is provided with a damper and is fixed at the gas path of the lower end thread of the spring body; the junction box is assembled outside the watch case and the glass sintered part, the strain sensor is arranged on the spring tube, the movement and the spring tube are connected through the bimetallic strip, and the dial is arranged at the front part in the watch case. The utility model discloses can thoroughly stop the oil leak problem, alleviate the impact of air current to the spring pipe when the density gauge assembles.

Description

Adopt glass sintering mode SF6 density controller of bimetallic strip structure

Technical Field

The utility model belongs to the technical field of high tension switchgear on-line monitoring equipment, concretely relates to adopt glass sintering mode SF6 density controller of bimetallic strip structure.

Background

At present, high-voltage switches used for supplying high voltage of power supply system are used for SF₆Gas density monitoring in the switch body is crucial. Existing oil-filled SF₆Density controllers have some significant disadvantages: the junction box is mainly used for leaking most oil. The universal junction box in the market at present is sealed with the watchcase through the sealing ring, moreover, the metal wiring terminal for wiring is installed in a plastic part through an embedding method, then a junction box fixing part is assembled on the metal wiring terminal, the middle part of the junction box fixing part is sealed through the sealing ring, the whole system is fastened on the watchcase through the nut, and oil leakage is easy to occur due to the fact that the sealing surface between the base of the junction box and the watchcase is too large and the sealing effect is poor. And the binding post is not good enough with plastics inlaying effect, and the oil seepage phenomenon can take place for binding post and working of plastics junction, and the sealed face in the middle of terminal box base and terminal box mounting is not smooth enough, also can the oil seepage for a long time. And because the whole system is fixed by four nuts, the whole system can incline when the four nuts are not locked in balance, and then oil can leak from a place with a large gap.

SUMMERY OF THE UTILITY MODEL

In view of the above, the main objective of the present invention is to provide a SF6 density controller using a dual-metal sheet structure in a glass sintering manner.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the embodiment of the utility model provides an adopt glass sintering mode SF6 density controller of bimetallic strip structure, this density controller includes core, spring pipe, watchcase, pointer, glass fritting piece, spring body, attenuator, strain sensor, bimetallic strip, terminal box, dial plate, the one end of spring body stretches into in the watchcase, outside one side of watchcase is provided with the glass fritting piece that welds together with the watchcase, set up the core of being connected with one end of spring body in the watchcase, install the pointer on the core; the spring body is provided with a spring pipe, and the lower side of the spring body is provided with a damper and is fixed at the gas path of the lower end thread of the spring body; the junction box is assembled outside the watch case and the glass sintered part, the strain sensor is arranged on the spring tube, the movement and the spring tube are connected through the bimetallic strip, and the dial is arranged at the front part in the watch case.

In the above aspect, the density controller further includes a circuit board disposed at the rear portion inside the case and electrically connected to the strain sensor, for sending an electrical signal to the client through the junction box.

In the above scheme, the pointer is connected with the central shaft of the movement through the movement mounting cap, the rotating gear is sleeved outside the movement mounting cap, the lower side of the pointer is provided with the zero adjusting screw, the rear end of the zero adjusting screw is provided with the zero adjusting gear, and the zero adjusting gear is meshed with the rotating gear.

In the scheme, one side of the pointer is used for indicating the position on the dial plate, and the other side of the pointer is connected with the electric contact through the cushion block and used for controlling the disconnection or connection of the circuit.

In the above scheme, the electric contact comprises a fixed contact and a movable contact, the fixed contact is fixed on the back side surface of the dial plate, the end part of the fixed contact is connected with the junction box through a cable, the movable contact is abutted against the fixed contact in a default state, the lower side of the movable contact is hinged to the cushion block, and the lower end of the movable contact is connected with the junction box through a cable.

In the above scheme, a push rod for pushing the movable contact when the pointer rotates clockwise is arranged on the upper side of the pointer.

Compared with the prior art, the utility model can thoroughly avoid the oil leakage problem; the insulating and pressure-resistant strength of the glass sintering part is higher than that of the traditional junction box, the traditional junction box can only reach 2.5Kv, and the lowest insulating and pressure-resistant strength of the glass sintering part can reach 3 Kv; the impact of the airflow on the spring tube during the assembly of the density meter can be effectively relieved.

Drawings

The accompanying drawings, which are described herein, serve to disclose a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are used to explain the invention and not to constitute an undue limitation on the invention. In the drawings:

fig. 1 is a schematic mechanism diagram of a glass sintering type SF6 density controller adopting a bimetallic strip structure according to an embodiment of the present invention;

FIG. 2 is a right side view of FIG. 1;

fig. 3 is a schematic structural diagram of a pointer in a glass sintering type SF6 density controller adopting a bimetallic strip structure according to an embodiment of the present invention;

fig. 4 is a top view of fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the utility model provides an adopt glass sintering mode SF6 density controller of bimetallic strip structure, as shown in fig. 1-4, this density controller includes core 1, spring pipe 2, watchcase 3, pointer 4, glass fritting 5, spring body 6, attenuator 7, strain sensor 8, bimetallic strip 9, terminal box 10, dial plate 11, one end of spring body 6 stretches into in the watchcase 3, the outside one side of watchcase 3 is provided with the glass fritting 5 of welding together with watchcase 3, set up in the watchcase 3 with the core 1 of spring body 6 one end connection, install pointer 4 on the core 1; the spring body 6 is provided with a spring tube 2, and the lower side of the spring body 6 is provided with a damper 7 and fixed at the gas path of the lower end thread of the spring body 6; the exterior of the watch case 3 and the glass frit 5 is equipped with a terminal box 10, the strain sensor 8 is arranged on the spring tube 2, the movement 1 and the spring tube 2 are connected through a bimetallic strip 9, and the dial 11 is arranged at the front part in the watch case 3.

The density controller also comprises a circuit board 12, said circuit board 12 being arranged at the rear inside the watch case 3 and being electrically connected to the strain sensor 8 for sending electrical signals to the client through the terminal box 10.

The pointer 4 is connected with a central shaft of the movement 1 through a movement mounting cap 41, a rotating gear 42 is sleeved outside the movement mounting cap 41, a zero adjusting screw 43 is arranged on the lower side of the pointer 4, a zero adjusting gear 44 is arranged at the rear end of the zero adjusting screw 43, and the zero adjusting gear 44 is meshed with the rotating gear 42.

The pointer 4 is a zero-setting pointer, when the pointer 4 is not at the zero position, the zero-setting screw 43 on the pointer is rotated by a screwdriver, and the zero-setting gear 44 drives the rotating gear 42 on the fixed movement mounting cap 41 to rotate, so that the pointer 4 rotates, and zero setting is realized.

One side of the pointer 4 is used for indicating a position on the dial 11, and the other side of the pointer is connected with an electric contact through a cushion block 13 and used for controlling the disconnection or connection of a circuit.

The electric contact comprises a fixed contact 45 and a movable contact 46, the fixed contact 45 is fixed on the back side surface of the dial 11, the end part of the fixed contact is connected with the junction box 10 through a cable, the movable contact 46 is abutted against the fixed contact 45 in a default state, the lower side of the movable contact is hinged with the cushion block 13, and the lower end of the movable contact 46 is connected with the junction box 10 through a cable.

The upper side of the pointer 4 is provided with a push rod 47 for pushing the movable contact 46 when the pointer 4 rotates clockwise.

The front of case 3 is also provided with a front ring assembly 14.

The utility model discloses a working process:

when the product is assembled on equipment, SF6 gas is filled in the spring tube 2, at the moment, the spring tube 2 expands to drive the bimetallic strip 9 at the tube end to move, and the bimetallic strip 9 drives the sector teeth of the movement 1, so that the central shaft of the movement 1 rotates to drive the pointer 4 to rotate.

The pointer 4 forms an indicating function through the dial 11 in the rotating process, when the pressure of SF6 gas in the spring tube 2 is greater than the rated pressure, the pointer 4 pushes the movable contact 46 open when rotating clockwise, so that the fixed contact 45 and the movable contact 46 are disconnected, and the loop of the whole circuit system is disconnected; when the pressure of SF6 gas in the spring tube 2 is reduced to be less than the rated pressure, the pointer 4 rotates anticlockwise, the fixed contact 45 and the movable contact 46 are attracted, the whole circuit system loop is connected, and therefore an alarm signal is sent to a background.

When the gas pressure in the spring tube 2 is increased, the spring tube 2 expands, at the moment, the strain sensor 8 attached to the spring tube 2 deforms, the strain sensor 8 converts the deformation into an electric signal, the electric signal is processed by the circuit board 12, the signal is output to a client through the junction box 10, and real-time dynamic monitoring of SF6 gas density in the monitored switch gas chamber can be achieved.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplified description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A glass sintering SF6 density controller adopting a bimetallic strip structure is characterized by comprising a movement, a spring pipe, a watch case, a pointer, a glass sintered part, a spring body, a damper, a strain sensor, a bimetallic strip, a junction box and a dial plate, wherein one end of the spring body extends into the watch case, one side of the outer part of the watch case is provided with the glass sintered part welded with the watch case, the movement connected with one end of the spring body is arranged in the watch case, and the pointer is arranged on the movement; the spring body is provided with a spring pipe, and the lower side of the spring body is provided with a damper and is fixed at the gas path of the lower end thread of the spring body; the junction box is assembled outside the watch case and the glass sintered part, the strain sensor is arranged on the spring tube, the movement and the spring tube are connected through the bimetallic strip, and the dial is arranged at the front part in the watch case.

2. The SF6 density controller adopting bimetallic glass sintering mode, according to claim 1, further comprising a circuit board disposed at the rear part inside the watch case and electrically connected to the strain sensor for sending electric signals to the client through the junction box.

3. The SF6 density controller of glass sintering mode with bimetallic strip structure as in claim 1 or 2, wherein the pointer is connected with the central shaft of the movement through a movement mounting cap, a rotation gear is sleeved outside the movement mounting cap, a zero setting screw is arranged at the lower side of the pointer, a zero setting gear is arranged at the rear end of the zero setting screw, and the zero setting gear is meshed with the rotation gear.

4. The SF6 density controller of claim 3, wherein the pointer is used to indicate the position on the dial and connected to the electric contact through the pad on the other side for controlling the open or close of the circuit.

5. The SF6 density controller of claim 4, wherein the contacts include a fixed contact fixed on the back of the dial and connected to the terminal box by a cable, and a movable contact which is in the default state and is abutted against the fixed contact and hinged to the pad at the lower side, and the movable contact is connected to the terminal box by a cable at the lower end.

6. The SF6 density controller of claim 5, wherein the upper side of the finger is provided with a push rod for pushing the moving contact when the finger rotates clockwise.