A capacitor with built-in temperature and pressure sensors

Abstract

The utility model requests protect a kind of capacitor of built-in temperature and pressure sensor, including shell, capacitor group, the upper cover being set in the upper portion of shell, multiple electrically conductive posts passing through the installation of upper cover, shell is also provided with support plate in, support plate is provided with the positioning hole for single electrically conductive post insertion, each positioning hole is provided with the electrically conductive copper piece that upper end can be connected with electrically conductive post and lower end is connected with capacitor group;Support plate is provided with temperature sensor, pressure sensor and pressure reducing push rod, inner plane is provided with terminal, terminal is connected with temperature sensor, pressure sensor and pressure reducing push rod respectively by wire, the movable end of pressure reducing push rod and inner plane resist, for controlling electrically conductive post and capacitor group separate. When the capacitor temperature and pressure of the application are judged to be too high, the pressure reducing push rod can be controlled to act to drive the inner plane to rise according to the requirement, so as to control the pressure reduction in shell and make electrically conductive post and capacitor group separate and stop working.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, specifically to a capacitor with built-in temperature and pressure sensors. Background Technology

[0002] As a widely used reactive power source for reactive power compensation in China's power systems, the reliable operation of capacitors directly affects the safe, stable, and economical operation of the power system. Existing capacitors, such as the one disclosed in patent application number CN209133357U, are cylindrical self-healing low-voltage parallel capacitors. These capacitors use deformation of the top cover to control the disconnection of the conductive pillars and conductive copper components, thus stopping the capacitor bank from heating up. However, existing designs cannot monitor the state of the capacitors. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a capacitor with built-in temperature and pressure sensors. By setting temperature and pressure sensors to monitor the capacitor, the safety of the capacitor is improved.

[0004] The technical solution of this utility model is as follows: A capacitor with built-in temperature and pressure sensors includes a housing, a capacitor bank, a top cover disposed on the top of the housing, and multiple conductive posts installed through the top cover. A support plate is also disposed inside the housing, and the support plate has positioning holes for inserting individual conductive posts. Each positioning hole has a conductive copper component whose upper end can be connected to the conductive post and whose lower end can be connected to the capacitor bank. The top cover includes an mounting edge, a first folded edge, a second folded edge, a third folded edge, and an inner plane, from the outside to the inside. The mounting edge connects to the upper edge of the housing, and the first folded edge, second folded edge, and third folded edge form an upward-facing recess. A temperature sensor, a pressure sensor, and a pressure-reducing push rod are disposed on the support plate. A terminal block is disposed on the inner plane, and the terminal block is connected to the temperature sensor, pressure sensor, and pressure-reducing push rod respectively via wires. The movable end of the pressure-reducing push rod abuts against the inner plane to control the separation of the conductive post and the capacitor bank.

[0005] In summary, the above technical solution has the following beneficial effects: By setting temperature and pressure sensors inside the capacitor, this application can determine whether the temperature and pressure inside the capacitor are abnormal. Compared with traditional capacitors, when the temperature and pressure of the capacitor are too high, this application can control the action of the pressure-reducing push rod to drive the inner plane to rise as needed, thereby controlling the pressure inside the shell to decrease and allowing the conductive column and capacitor group to separate and stop working. Attached Figure Description

[0006] Figure 1 A schematic diagram of the first cross-section of a capacitor with built-in temperature and pressure sensors; Figure 2This is a schematic diagram of the second cross-section of a capacitor with built-in temperature and pressure sensors.

[0007] Reference numerals: 10, housing; 11, support plate; 12, positioning hole; 13, conductive copper component; 20, capacitor bank; 30, top cover; 31, mounting edge; 32, first folded edge; 33, second folded edge; 34, third folded edge; 35, inner plane; 40, conductive post; 50, temperature sensor; 60, pressure sensor; 70, pressure reducing push rod; 80, terminal block; 90, wire sleeve. Detailed Implementation

[0008] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0009] A capacitor with built-in temperature and pressure sensors includes a housing 10, a capacitor bank 20, a top cover 30 disposed above the housing 10, and a plurality of conductive posts 40 installed through the top cover 30. A support plate 11 is also disposed inside the housing 10. The support plate 11 has positioning holes 12 for inserting individual conductive posts 40. Each positioning hole 12 has a conductive copper component 13 whose upper end can be connected to the conductive post 40 and whose lower end can be connected to the capacitor bank 20. The top cover 30 includes an outer mounting edge 31, a first folded edge 32, a second folded edge 33, and a third folded edge, arranged from the outside in. 34 and inner plane 35, mounting edge 31 and upper edge of housing 10 are connected, first fold 32, second fold 33 and third fold 34 form an upward recess; temperature sensor 50, pressure sensor 60 and pressure reducing push rod 70 are provided on support plate 11, wiring terminal 80 is provided on inner plane 35, wiring terminal 80 is connected to temperature sensor 50, pressure sensor 60 and pressure reducing push rod 70 respectively through wires, the movable end of pressure reducing push rod 70 abuts against inner plane 35, used to control the separation of conductive post 40 and capacitor group 20.

[0010] This application, by setting a temperature sensor 50 and a pressure sensor 60 inside the capacitor, can determine whether the temperature and pressure inside the capacitor are abnormal. Compared with traditional capacitors, when the temperature and pressure of the capacitor are too high, this application can control the action of the pressure-reducing push rod 70 to drive the inner plane 35 to rise as needed, thereby controlling the pressure inside the housing 10 to decrease and allowing the conductive post 40 and the capacitor group 20 to separate and stop working.

[0011] Specifically, the self-healing structure composed of the top cover 30, conductive pillar 40, support plate 11, and conductive copper component 13 can be referenced in prior application CN209133357U, a cylindrical self-healing low-voltage parallel capacitor. When the capacitor malfunctions, causing the temperature to rise and the pressure to increase, the obtuse angle formed by the second fold 33 and the third fold 34 gradually increases, causing the inner plane 35 to rise, thereby causing the conductive pillar 40 and the conductive copper component 13 to separate. The specific principle is based on existing technology and will not be elaborated here.

[0012] Specifically, temperature sensor 50 is a thermistor temperature sensor, such as model 34B502F. Pressure sensor 60 is, for example, a DF9-40 piezoresistive sensor. Temperature sensor 50 and pressure sensor 60 are connected to terminal 80 via wires. An external controller is connected to a capacitor via terminal 80 to obtain parameter signals from temperature sensor 50 and pressure sensor 60. The pressure-reducing push rod 70 includes an electromagnet, an elastic element, and a push rod. The push rod moves up and down by controlling the magnetic force of the electromagnet. The principle and structure are the same as existing electromagnetic push rods. The pressure-reducing push rod 70 is also connected to an external controller via terminal 80. This design can monitor the specific parameters of the capacitor to determine its state. For example, if a capacitor malfunction causes the top cover 30 to protrude, it can monitor whether the temperature exceeds a threshold or the pressure first exceeds the threshold and then decreases. Therefore, if the temperature and pressure exceed the threshold but the pressure does not decrease, it can be determined that the capacitor top cover 30 is malfunctioning and has not actively protruded. In this case, the controller can actively push the top cover 30 to protrude via the pressure-reducing push rod 70. This avoids the situation where the top cover 30 cannot rise automatically, further improving the safety of the capacitor.

[0013] A wire sleeve 90 is provided at the end of the second fold 33 near the first fold 32. The wire sleeve 90 is used to guide the wire away from the conductive post 40. The wire sleeve 90 is cylindrical and passes through it. It does not clamp or fix the wire, but only changes the route of the wire away from the conductive post 40. Because the upper cover 30 will move up and down, the wire must have enough slack to accommodate the height change of the terminal 80 on the upper cover 30. During the height change, the guide may move and touch the conductive post 40. Therefore, the wire sleeve 90 is provided at the end of the second fold 33 near the first fold 32 to guide the wire away from the conductive post 40.

[0014] The perforation in the 90mm sleeve for guiding is circular.

[0015] The sleeve 90 and the top cover 30 are molded as a single piece. The one-piece molding of the sleeve 90 and the top cover 30 makes them more robust.

[0016] There are three pairs of conductive posts 40 arranged side by side. Two voltage-reducing push rods 70 are provided, positioned on either side of the arrangement of the three conductive posts 40. The three pairs of conductive posts 40 are used to connect the three phases of the power supply and their corresponding neutral wires. Since the space on either side of the three pairs of conductive posts 40 in opposite directions is relatively large, the voltage-reducing push rods 70 are positioned on both sides to push the inner plane 35 upwards. The terminal block 80, temperature sensor 50, and pressure sensor 60 can be arbitrarily positioned where possible.

[0017] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A capacitor with built-in temperature and pressure sensors, comprising a housing (10), a capacitor bank (20), an upper cover (30) disposed above the housing (10), and a plurality of conductive posts (40) installed through the upper cover (30). A support plate (11) is also disposed inside the housing (10). The support plate (11) is provided with positioning holes (12) for inserting individual conductive posts (40). Each positioning hole (12) is provided with a conductive copper part (13) whose upper end can be connected to the conductive post (40) and whose lower end is connected to the capacitor bank (20). The upper cover (30) includes an mounting edge (31), a first folded edge (32), a second folded edge (33), a third folded edge (34), and an inner plane (35) from the outside to the inside. The mounting edge (31) is connected to the upper edge of the housing (10). The first folded edge (32), the second folded edge (33), and the third folded edge (34) form an upward-facing recess. Its features are, The support plate (11) is provided with a temperature sensor (50), a pressure sensor (60) and a pressure-reducing push rod (70). The inner plane (35) is provided with a terminal block (80). The terminal block (80) is connected to the temperature sensor (50), the pressure sensor (60) and the pressure-reducing push rod (70) respectively through wires. The movable end of the pressure-reducing push rod (70) abuts against the inner plane (35) to control the separation of the conductive post (40) and the capacitor group (20).

2. The capacitor with a built-in temperature and pressure sensor according to claim 1, characterized in that, The second fold (33) is provided with a wire sleeve (90) at one end near the first fold (32), and the wire sleeve (90) is used to guide the wire away from the conductive post (40).

3. The capacitor with a built-in temperature and pressure sensor according to claim 2, characterized in that, The perforation in the sleeve (90) for guiding is circular.

4. A capacitor with a built-in temperature and pressure sensor according to claim 2, characterized in that, The sleeve (90) and the top cover (30) are integrally formed.

5. A capacitor with a built-in temperature and pressure sensor according to claim 1, characterized in that, The conductive posts (40) are provided in three pairs, and the three pairs of conductive posts (40) are arranged side by side. There are two voltage-reducing push rods (70), which are respectively arranged on both sides of the arrangement direction of the three conductive posts (40).

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