Capacitor discharge device and discharge system using the same

Abstract

The present invention discloses a capacitor discharge device and a discharge system using the same. The capacitor discharge device is used to discharge a capacitor and includes a housing, a first contact, a second contact, a drive mechanism, and at least one discharge element. The first contact, the second contact, the drive mechanism, and the discharge element are all installed in the housing. One end of the discharge element is electrically connected to either the positive or negative electrode of the capacitor. The other end of the discharge element is electrically connected to the first contact. The second contact is electrically connected to the remaining positive or negative electrode of the capacitor. The drive mechanism is connected to the first contact and is used to drive the first contact to move until it is electrically connected to the second contact to discharge the capacitor. The present invention can improve the efficiency of capacitor discharge, shorten the discharge time, and automatically control the discharge, reducing the workload of workers and improving the safety and automation of the discharge operation.

Description

Technical Field

[0001] The present invention relates to a capacitor discharge device and a discharge system using the same. Background Art

[0002] At present, with the vigorous development of power transmission and distribution, more and more power products have emerged, such as flexible DC converter valves, SVG, DC distribution networks, etc. These power products all use power units. Power units are the core part of these power products and play a vital role in the normal operation of the entire power grid.

[0003] Capacitors are a crucial component of power units. When the system loses power, they cannot discharge quickly enough, requiring approximately an hour for the capacitors to discharge naturally. This significantly inconveniences maintenance and commissioning. The existing discharge method requires manually discharging each capacitor using a discharge rod, which is labor-intensive. Furthermore, the power supply is located more than ten meters above the ground, making discharge via the discharge rod inconvenient. Furthermore, the voltage levels of power supply units are high, and manually discharging each capacitor individually poses significant safety risks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a capacitor discharge device, which can improve the efficiency of capacitor discharge, shorten the discharge time, and automatically control the discharge, reduce the workload of workers, and improve the safety and automation of the discharge operation.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a capacitor discharge device, which is used to discharge a capacitor, and includes a box body, a first contact, a second contact, a driving mechanism and at least one discharge element; wherein,

[0006] The first contact, the second contact, the driving mechanism and the discharge element are all installed in the box body;

[0007] One end of the discharge element is electrically connected to any one of the positive electrode and the negative electrode of the capacitor;

[0008] The other end of the discharge element is electrically connected to the first contact;

[0009] The second contact is electrically connected to the remaining one of the positive electrode and the negative electrode of the capacitor;

[0010] The driving mechanism is connected to the first contact and is used to drive the first contact to move to be electrically connected to the second contact to discharge the capacitor.

[0011] Furthermore, the discharge element is a resistor;

[0012] and / or the capacitor is a power capacitor;

[0013] and / or the driving mechanism is a cylinder;

[0014] And / or the box body is connected to the capacitor.

[0015] Further, in order to facilitate the connection of wires at both ends of the resistor, both ends of the resistor are provided with lead end plates;

[0016] Any one of the positive electrode and the negative electrode of the capacitor is connected to the lead terminal plate at one end of the resistor through a wire;

[0017] The first contact is connected to the lead terminal plate at the other end of the resistor through a wire.

[0018] In order to further indicate the position of the piston rod and improve the sliding accuracy of the piston rod, a pointer for indicating the position of the piston rod of the cylinder is provided on the piston rod of the cylinder;

[0019] And / or a guide sleeve is connected to the cylinder body of the cylinder for guiding the sliding of the piston rod of the cylinder.

[0020] Furthermore, the box body is provided with an open discharge chamber and a closed drive chamber, the first contact, the second contact and the drive mechanism are all installed in the drive chamber, and the discharge element is installed in the discharge chamber;

[0021] And / or the box body is made of insulating material.

[0022] A specific structure of the box body is further provided, wherein the box body includes a driving box and a discharge box connected to the driving box; wherein,

[0023] The discharge chamber is arranged in the discharge box;

[0024] The driving chamber is arranged in the driving box;

[0025] The driving box and the discharge box are both made of insulating materials.

[0026] Furthermore, in order to enable the staff to see the position of the pointer, the drive box is at least partially made of a transparent material.

[0027] A specific connection method of the discharge element is further provided, and the capacitor discharge device further includes an insulating bracket corresponding to the discharge element; wherein,

[0028] The insulating bracket is connected to the box body;

[0029] The discharge element is connected to the corresponding insulating bracket;

[0030] The outer side wall of the insulating bracket is provided with one or at least two anti-creeping umbrella skirts arranged in sequence from bottom to top.

[0031] A specific connection method for the second contact is further provided, wherein the capacitor discharge device further includes a mounting block, wherein the mounting block is provided with a mounting cavity, a guide hole and a wire hole; wherein,

[0032] The second contact is installed in the installation cavity;

[0033] The guide hole is in communication with the mounting cavity, and the first contact is configured to be driven through the guide hole and then plugged into the second contact;

[0034] The wire hole is communicated with the installation cavity, and the wire hole is used to pass a wire connected between the second contact and the capacitor.

[0035] The present invention also provides a discharge system for discharging a power unit, wherein the power unit is provided with at least one capacitor, and the discharge system includes at least one capacitor discharge device as described above, and further includes a gas source and a gas valve; wherein,

[0036] The capacitor discharge device corresponds to the power unit one by one;

[0037] The driving mechanism in the capacitor discharge device is a cylinder;

[0038] The cylinder is connected to the gas source via an air path;

[0039] The gas valve is connected to the gas path between the gas source and the gas cylinder and is used to control the opening and closing of the gas path;

[0040] One end of the discharge element in the capacitor discharge device is connected to any one of the positive electrode and the negative electrode of the corresponding capacitor;

[0041] The second contact in the capacitor discharge device is connected to the remaining one of the positive electrode and the negative electrode of the corresponding capacitor.

[0042] After adopting the above technical solution, the cylinder moves to drive the first contact to move and plug into the second contact. The first contact is connected to one end of the discharge element via a wire, the other end of the discharge element is connected to the negative electrode of the capacitor via a wire, and the second contact is connected to the positive electrode of the capacitor via a wire, thereby forming a discharge circuit between the positive and negative electrodes of the capacitor, so that the capacitor can be discharged quickly, improving the efficiency of capacitor discharge and shortening the discharge time. In addition, the device has a simple and compact structure. The cylinder drives the first contact and the second contact to plug into each other, realizing automatic control of discharge. Workers do not need to manually operate the discharge through the discharge rod, reducing their workload. Workers do not need to work at height or come into contact with high voltage, improving the safety and automation of the discharge operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Schematic diagram of the internal structure of the capacitor discharge device of the present invention;

[0044] Figure 2 Schematic diagram of the external structure of the capacitor discharge device of the present invention;

[0045] Figure 3 Schematic diagram of the structure of the discharge system of the present invention. DETAILED DESCRIPTION

[0046] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0047] Example 1

[0048] like Figures 1-3 As shown, a capacitor discharge device is used to discharge a capacitor 1, which includes a box body 2, a first contact 3, a second contact 4, a driving mechanism and at least one discharge element 5; wherein,

[0049] The first contact 3, the second contact 4, the driving mechanism and the discharge element 5 are all installed in the box body 2;

[0050] One end of the discharge element 5 is electrically connected to any one of the positive electrode and the negative electrode of the capacitor 1;

[0051] The other end of the discharge element 5 is electrically connected to the first contact 3;

[0052] The second contact 4 is electrically connected to the remaining one of the positive electrode and the negative electrode of the capacitor 1;

[0053] The driving mechanism is connected to the first contact 3 and is used to drive the first contact 3 to move and electrically connect with the second contact 4 to discharge the capacitor 1. Specifically, when the first contact 3 is electrically connected to the second contact 4, a discharge circuit is formed between the positive and negative electrodes of the capacitor 1 to discharge the capacitor 1, thereby improving the discharge efficiency of the capacitor 1 and shortening the discharge time. In this embodiment, the material of the first contact 3 and the second contact 4 can both be copper, and the surfaces of the first contact 3 and the second contact 4 are both provided with a silver plating layer to reduce the contact resistance when the first contact 3 and the second contact 4 are in contact.

[0054] In this embodiment, the discharge element 5 can be a resistor, the capacitor 1 can be a power capacitor, the driving mechanism can be a cylinder 6, and the box body 2 can be connected to the capacitor 1; in this embodiment, there are two resistors, and the two resistors are connected in parallel, one end of the resistor is connected to the negative electrode of the capacitor 1, and the other end of the resistor is connected to the first contact 3. Specifically, the cylinder 6 can be a spring cylinder 6 or a double-acting cylinder 6, the cylinder body of the cylinder 6 is connected to the box body 2, and the piston rod of the driving cylinder 6 is connected to the first contact 3. The first contact 3 and the second contact 4 are driven by the cylinder 6 to plug in, thereby realizing automatic control of discharge. The staff does not need to manually operate the discharge through the discharge rod, which reduces the workload of the staff. In addition, the staff does not need to work at high altitudes or come into contact with high voltage, which improves the safety and automation of the discharge operation.

[0055] like Figure 1 、 2 As shown, both ends of the resistor may be provided with lead end plates 7 to facilitate connection of wires to the resistor;

[0056] Any one of the positive electrode and the negative electrode of the capacitor 1 is connected to the lead terminal plate 7 at one end of the resistor through a wire;

[0057] The first contact 3 is connected to the lead end plate 7 at the other end of the resistor through a wire; in this embodiment, the negative electrode of the capacitor 1 is connected to the lead end plate 7 at one end of the resistor through a wire, and the lead end plate 7 can be a metal plate.

[0058] like Figure 1 As shown, the piston rod of the cylinder 6 may be provided with a pointer for indicating the position of the piston rod of the cylinder 6. By observing the position of the pointer, it can be known whether the first contact 3 and the second contact 4 are in the plugged state or the separated state;

[0059] A guide sleeve 8 is connected to the cylinder body of the cylinder 6 for guiding the sliding of the piston rod of the cylinder 6. The guide sleeve 8 can improve the movement accuracy of the piston rod of the cylinder 6, avoid the piston rod from tilting, and enable the first contact 3 on the piston rod to be accurately plugged into the second contact 4.

[0060] like Figure 1 、 2 As shown, the box body 2 may be provided with an open discharge chamber 9 and a closed drive chamber 10, the first contact 3, the second contact 4 and the drive mechanism are all installed in the drive chamber 10, and the discharge element 5 is installed in the discharge chamber 9; the box body 2 is made of insulating material; specifically, the discharge chamber 9 is configured to be open to facilitate heat dissipation of the discharge element 5, and the drive chamber 10 is configured to be closed to effectively isolate rainwater and prevent rainwater from damaging the cylinder 6.

[0061] like Figure 1 、 2 As shown, the box body 2 has, for example but not limited to the following structure, a driving box 11 and a discharge box 12 connected to the driving box 11; wherein,

[0062] The discharge chamber 9 is provided in the discharge box 12;

[0063] The driving chamber 10 is provided in the driving box 11;

[0064] The driving box 11 and the discharge box 12 are both made of insulating materials. In this embodiment, the driving box 11 includes a box body and a box cover. The driving box 11 and the discharge box 12 are connected together by bolts.

[0065] In this embodiment, the driving box 11 is at least partially made of a transparent material so that the position of the pointer on the piston rod of the cylinder 6 can be observed.

[0066] like Figure 1 、 2 As shown, the capacitor discharge device further includes an insulating bracket 13 corresponding to the discharge element 5; wherein,

[0067] The insulating bracket 13 is connected to the box body 2;

[0068] The discharge element 5 is connected to the corresponding insulating bracket 13;

[0069] The outer wall of the insulating bracket 13 is provided with one or at least two anti-creeping sheds 14 arranged in sequence from bottom to top to prevent creeping from occurring on the outer wall of the insulating bracket 13; in this embodiment, the insulating bracket 13 is connected to the discharge box 12, the insulating bracket 13 is made of insulating material, and the insulating bracket 13 corresponds to the discharge element 5 one by one.

[0070] like Figure 1 As shown, the capacitor discharge device may further include a mounting block 15, wherein the mounting block 15 is provided with a mounting cavity 16, a guide hole 17 and a wire hole 18; wherein,

[0071] The second contact 4 is installed in the installation cavity 16;

[0072] The guide hole 17 is connected to the installation cavity 16, and the first contact 3 is used to be driven through the guide hole 17 and then plugged into the second contact 4;

[0073] The wire hole 18 is communicated with the mounting cavity 16, and the wire hole 18 is used to pass the wire connected between the second contact 4 and the capacitor 1; in this embodiment, the mounting block 15 is installed in the driving chamber 10, and the mounting block 15 is made of insulating material.

[0074] Example 2

[0075] like Figures 1-3 As shown, a discharge system is used to discharge a power unit 100, wherein the power unit 100 is provided with at least one capacitor 1, the discharge system includes at least one capacitor discharge device 500 as described in Example 1, and the discharge system also includes a gas source 200 and a gas valve 300; wherein,

[0076] The capacitor discharge device 500 corresponds to the power unit 100 one by one;

[0077] The driving mechanism in the capacitor discharge device 500 is a cylinder 6;

[0078] The cylinder 6 is connected to the gas source 200 via an air path 400;

[0079] The gas valve 300 is connected to the gas path 400 between the gas source 200 and the gas cylinder 6 and is used to control the opening and closing of the gas path 400;

[0080] One end of the discharge element 5 in the capacitor discharge device 500 is connected to any one of the positive electrode and the negative electrode of the corresponding capacitor 1;

[0081] The second contact 4 in the capacitor discharge device 500 is connected to the remaining one of the positive and negative electrodes of the corresponding capacitor 1. In this embodiment, the gas source 200 is provided by a gas supply station, which is capable of adjusting the pressure and flow rate of the gas. The gas can be air or nitrogen. The gas circuit 400 can use a halogen-free UL94V-0 flame-retardant tube, and the gas valve 300 can use a solenoid valve. The power unit 100 and the gas supply station are existing technologies well known to those skilled in the art and are not described in detail in this embodiment. The capacitor 1 provided in the power unit 100 can be an electric capacitor.

[0082] The working principle of the present invention is as follows:

[0083] The cylinder 6 moves to move the first contact 3 to connect with the second contact 4. The first contact 3 is connected to one end of the discharge element 5 via a wire, and the other end of the discharge element 5 is connected to the negative electrode of the capacitor 1 via a wire. The second contact 4 is connected to the positive electrode of the capacitor 1 via a wire, thereby forming a discharge circuit between the positive and negative electrodes of the capacitor 1, so that the capacitor 1 can discharge quickly, thereby improving the discharge efficiency of the capacitor 1 and shortening the discharge time. In addition, the device has a simple and compact structure. The cylinder 6 drives the first contact 3 and the second contact 4 to connect, realizing automatic control of discharge. The staff does not need to manually operate the discharge through the discharge rod, which reduces the staff's workload. The staff does not need to work at height or come into contact with high voltage, which improves the safety and automation of the discharge operation.

[0084] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0085] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0086] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0087] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0088] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0089] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A capacitor discharge device for discharging a capacitor (1), characterized in that: It comprises a box body (2), a first contact (3), a second contact (4), a driving mechanism and at least one discharge element (5); The first contact (3), the second contact (4), the driving mechanism and the discharge element (5) are all installed in the box body (2); One end of the discharge element (5) is electrically connected to any one of the positive electrode and the negative electrode of the capacitor (1); The other end of the discharge element (5) is electrically connected to the first contact (3); The second contact (4) is electrically connected to the remaining one of the positive electrode and the negative electrode of the capacitor (1); The driving mechanism is connected to the first contact (3) and is used to drive the first contact (3) to move to electrically connect with the second contact (4) to discharge the capacitor (1); Wherein, the discharge element (5) is a resistor, the capacitor (1) is a power capacitor, the driving mechanism is a cylinder (6), and the box body (2) is connected to the capacitor (1); Wherein, a pointer for indicating the position of the piston rod of the cylinder (6) is provided on the piston rod of the cylinder (6), and a guide sleeve (8) for guiding the sliding of the piston rod of the cylinder (6) is connected to the cylinder body of the cylinder (6); The box body (2) is provided with an open discharge chamber (9) and a closed drive chamber (10); the first contact (3), the second contact (4) and the drive mechanism are all installed in the drive chamber (10); the discharge element (5) is installed in the discharge chamber (9); and the box body (2) is made of insulating material; Wherein, the box body (2) comprises a driving box (11) and a discharge box (12) connected to the driving box (11); The discharge chamber (9) is arranged in the discharge box (12); The driving chamber (10) is arranged in the driving box (11); The driving box (11) and the discharge box (12) are both made of insulating material; Wherein, the driving box (11) is at least partially made of a transparent material; It also includes a mounting block (15), wherein the mounting block (15) is provided with a mounting cavity (16), a guide hole (17) and a wire hole (18); The second contact (4) is installed in the installation cavity (16); The guide hole (17) is connected to the mounting cavity (16), and the first contact (3) is used to be driven through the guide hole (17) and then plugged into the second contact (4); The wire hole (18) is in communication with the mounting cavity (16), and the wire hole (18) is used to pass a wire connected between the second contact (4) and the capacitor (1).

2. The capacitor discharge device according to claim 1, wherein: Both ends of the resistor are provided with lead end plates (7); Any one of the positive electrode and the negative electrode of the capacitor (1) is connected to a lead terminal plate (7) at one end of the resistor via a wire; The first contact (3) is connected to the lead end plate (7) at the other end of the resistor via a wire.

3. The capacitor discharge device according to claim 1, wherein: It also includes an insulating bracket (13) corresponding to the discharge element (5); wherein, The insulating bracket (13) is connected to the box body (2); The discharge element (5) is connected to a corresponding insulating bracket (13); One or at least two anti-creeping umbrella skirts (14) are provided on the outer side wall of the insulating bracket (13) and are arranged sequentially from bottom to top.

4. A discharge system for discharging a power unit (100), wherein the power unit (100) is provided with at least one capacitor (1), wherein the power unit (100) is provided with a capacitor (1), characterized in that: It comprises at least one capacitor discharge device (500) as claimed in any one of claims 1 to 3, and further comprises a gas source (200) and a gas valve (300); wherein, The capacitor discharge device (500) corresponds one-to-one to the power unit (100); The driving mechanism in the capacitor discharge device (500) is a cylinder (6); The cylinder (6) is connected to the gas source (200) via an air path (400); The gas valve (300) is connected to the gas path (400) between the gas source (200) and the gas cylinder (6), and is used to control the opening and closing of the gas path (400); One end of the discharge element (5) in the capacitor discharge device (500) is connected to any one of the positive electrode and the negative electrode of the corresponding capacitor (1); The second contact (4) in the capacitor discharge device (500) is connected to the remaining one of the positive electrode and the negative electrode of the corresponding capacitor (1).

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