Discharge resistor based on spring-shaped continuous resistance wire

Abstract

The utility model provides a discharge resistor based on a spring-shaped continuous resistance wire, which is used for solving the technical problems that the size of the existing large-resistance resistor is increased along with the increase of the length of a resistance material, so that the production cost is higher, and the intelligent and miniaturized requirements are not met. According to the discharge resistor based on the spring-shaped continuous resistance wire, the resistor body is arranged to be the spring-shaped continuous resistance wire, the length of a resistor current path is increased through the spring-shaped continuous resistance wire, and a higher resistance value is realized in a spring-shaped path, so that the size of a resistor cross section required by current impact is met; under the same volume, the resistance value of the resistor disclosed by the utility model is far greater than that of the traditional resistor disc or resistive film, and meanwhile, the resistor is simple in structure, low in cost and capable of being used in an environment with greater vibration, and effectively ensures the safe and reliable operation of a product; and meanwhile, high resistance is further realized through series connection or parallel connection of a plurality of resistor bodies.

Description

Technical Field

[0001] The utility model relates to a resistor, in particular to a discharge resistor based on a spring-shaped continuous resistance wire. Background Art

[0002] With the rapid development of industries such as power transmission and distribution, pulsed power, and capacitor discharge, the demand for high-value discharge resistors is becoming more and more extensive. In traditional technologies, resistor chips and resistor films are usually used as current carriers for discharge resistors. Due to the high temperature change response, high temperature resistance, and high stability of filamentous resistors, more and more high-value discharge resistors use filamentous resistance materials as current carriers. However, to achieve a relatively large resistance value for a filamentous resistor, the length of the resistance material needs to be increased, which increases the overall length and volume of the discharge resistor, thereby increasing the production cost and not meeting the requirements of intelligence and miniaturization. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the technical problem that the volume of the existing high-value resistor increases with the increase in the length of the resistance material, resulting in a relatively high production cost and not meeting the requirements of intelligence and miniaturization, and to provide a discharge resistor based on a spring-shaped continuous resistance wire.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A discharge resistor based on a spring-shaped continuous resistance wire, characterized in that it includes M resistance bodies, M insulating tubes, M heat dissipation tubes, and M tube plugs, where M≥1;

[0006] The resistance body is a spring-shaped continuous resistance wire, and two lead-out ends are respectively arranged at one end of each of the M resistance bodies;

[0007] Both the insulating tube and the heat dissipation tube are made of high-temperature resistant materials;

[0008] The body of the resistance body is encapsulated in the corresponding insulating tube, and its two lead-out ends are exposed;

[0009] One end of the heat dissipation tube is closed, and the other end is open; each of the M insulating tubes is respectively arranged in the corresponding heat dissipation tube; each of the M tube plugs is made of high-temperature resistant insulating material, and two through holes corresponding to the two lead-out ends of the corresponding resistance body are opened thereon. The tube plug is arranged on one side of the open end in the corresponding heat dissipation tube and abuts against the insulating tube to seal and fix the insulating tube in the corresponding heat dissipation tube; the two lead-out ends of each resistance body pass through the two through holes on the corresponding tube plug;

[0010] When M = 1, an installation component is arranged on the heat dissipation tube for connecting with an external device through the installation component. At this time, the resistance body is also one, and its two lead-out ends are used for connecting with an external device;

[0011] When M > 1, the M heat dissipation tubes are connected together through the mounting assembly and connected to external equipment through the mounting assembly; the M resistor bodies are connected in series or parallel through corresponding lead-out ends.

[0012] Furthermore, the mounting assembly includes a mounting plate, M fixing plates, an external mounting plate, and M sets of fasteners;

[0013] The mounting plate is correspondingly provided with M through holes adapted to the outer diameters of the M heat dissipation tubes. The mounting plate is sleeved on the outer side wall of one end of the M heat dissipation tubes close to the pipe plug through the M through holes, and is fixedly welded at the contact circle between the mounting plate and the heat dissipation tubes;

[0014] Each of the M fixing plates is provided with a through hole adapted to the outer diameter of the heat dissipation tube. The M fixing plates are sleeved on the outer side wall of the corresponding heat dissipation tube at one end far from the pipe plug through the through hole, and are fixedly welded at the contact circle between the fixing plate and the heat dissipation tube;

[0015] The M sets of fasteners are used to fixedly connect the M fixing plates to the external mounting plate;

[0016] The mounting plate and the external mounting plate are respectively provided with mounting holes for connecting and fixing to external equipment.

[0017] Furthermore, it further includes a thermocouple mounting tube and a thermocouple;

[0018] The mounting plate is further provided with a through hole adapted to the outer diameter of the thermocouple mounting tube. The thermocouple mounting tube is installed on the mounting plate through the through hole, and is fixedly welded at the contact circle between the mounting plate and the thermocouple mounting tube;

[0019] The thermocouple is fixedly installed in the thermocouple mounting tube and contacts the inner side wall of the thermocouple mounting tube for detecting the heat generation condition of the resistor body.

[0020] Furthermore, the thermocouple is clamped and fixed on the inner side wall of the thermocouple mounting tube by a stainless steel hoop.

[0021] Furthermore, the insulating tube is filled with quartz sand, and the heat dissipation tube is filled with quartz sand.

[0022] Furthermore, M > 1, and the M heat dissipation tubes are connected together side by side at equal intervals through the mounting assembly.

[0023] Furthermore, M = 3.

[0024] Furthermore, the insulating tube is a ceramic tube, the heat dissipation tube is a stainless steel tube, and the pipe plug is made of high-temperature resistant silica gel.

[0025] Furthermore, the resistor body is a continuous nickel-chromium alloy wire in a spring shape.

[0026] Furthermore, the thermocouple is a PT100 thermocouple.

[0027] The beneficial effects of the present utility model compared with the prior art are as follows:

[0028] 1. For a discharge resistor based on a continuous resistor wire in a spring shape provided by the present utility model, the resistor body is set as a continuous resistor wire in a spring shape. By the continuous resistor wire in a spring shape, the length of the resistor current path is increased, and a relatively high resistance value is achieved within the spring-shaped path. It not only meets the cross-sectional size of the resistor required for current impact, but also under the same volume setting, the resistance value of the resistor of the present utility model is much larger than that of traditional resistor chips or resistor films. At the same time, the structure is simple and the cost is low, and it can be used in an environment with large vibrations, effectively ensuring the safe and reliable operation of the product. At the same time, when multiple resistor bodies are provided, a higher resistance value can be further achieved through the series or parallel connection of multiple resistor bodies.

[0029] 2. For a discharge resistor based on a continuous resistor wire in a spring shape provided by the present utility model, the resistor body is encapsulated and dissipated heat through an insulating tube and a heat dissipation tube, with strong mechanical properties and a rated continuous power for the resistor.

[0030] 3. The resistor of the present utility model can detect the heat generation condition of the resistor body by installing a thermocouple on the heat dissipation tube, realizing self-temperature measurement, avoiding the direct contact of the thermocouple with the resistor body with high voltage, and avoiding the risk of high-voltage leakage, and the structure is safer and more reliable.

[0031] 4. By filling quartz sand in the insulating tube and the heat dissipation tube, the present utility model not only facilitates the fixation of the resistor body and the insulating tube, but also can transfer heat to the outside through the quartz sand. At the same time, the quartz sand is an insulator, which can greatly improve the insulation ability between the resistor body and the heat dissipation tube, and miniaturize the volume of the resistor. Description of the Drawings

[0032] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of a discharge resistor based on a continuous resistor wire in a spring shape of the present utility model;

[0033] Figure 2 is an exploded view of an embodiment of a discharge resistor based on a continuous resistor wire in a spring shape of the present utility model.

[0034] Specific reference numerals are as follows:

[0035] 1 - resistor body; 2 - insulating tube; 3 - heat dissipation tube; 4 - tube plug; 5 - thermocouple installation tube; 6 - thermocouple; 7 - mounting plate; 8 - fixing plate; 9 - external mounting plate; 10 - fastener. Detailed Embodiment

[0036] To make the advantages and features of the present utility model clearer, the following further elaborates on the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0037] Embodiment 1

[0038] As Figure 1 、 Figure 2 shown, a discharge resistor based on a spring-shaped continuous resistance wire includes three resistance bodies 1, three insulating tubes 2, three heat dissipation tubes 3, three tube plugs 4, a thermocouple installation tube 5, a thermocouple 6, and a mounting assembly.

[0039] The resistance body 1 is a spring-shaped continuous resistance wire. Preferably, in this embodiment, the resistance body 1 is made of a spring-shaped continuous nickel-chromium alloy wire. Two lead-out ends, namely a first lead-out end and a second lead-out end, are respectively arranged at one end of each resistance body 1, and are used to make the three resistance bodies 1 in series or parallel according to different connection relationships of the lead-out ends of the three resistance bodies 1. In this embodiment, the first lead-out end of the first resistance body 1 and the second lead-out end of the third resistance body 1 are respectively used to connect with external devices. The second lead-out end of the first resistance body 1 is connected to the first lead-out end of the second resistance body 1, and the second lead-out end of the second resistance body 1 is connected to the first lead-out end of the third resistance body 1, so as to make the three resistance bodies 1 in series and form a current path with an "M" - shaped flow direction.

[0040] The present utility model uses a spring-shaped continuous resistance wire as the resistance body to increase the length of the resistance current path, and at the same time makes it reach the required resistance value through different connection methods of the lead-out ends of multiple resistance bodies 1, and can meet the cross-sectional size of the resistance required by the current impact. In other embodiments of the present utility model, different resistance materials such as iron-chromium-aluminum materials can also be selected according to resistance parameters. The resistance materials have great flexibility, and at the same time, the length and diameter of the resistance wire are determined according to electrical parameters to ensure the electrical performance of the resistor.

[0041] Since the resistance body 1 is a heating element, in order to fully dissipate heat, both the insulating tube 2 and the heat dissipation tube 3 are made of high-temperature resistant materials. In this embodiment, the insulating tube is preferably a ceramic tube, and the heat dissipation tube is preferably a stainless steel tube. The body of each resistance body 1 is encapsulated in the corresponding insulating tube 2, and its two lead-out ends are exposed; at the same time, the insulating tube 2 is filled with quartz sand. The filled quartz sand on the one hand facilitates the fixation of the resistance body 1 in the insulating tube 2, and on the other hand can transfer heat to the outside through the quartz sand. One end of the heat dissipation tube 3 is closed, and the other end is open. The insulating tube 2 is arranged in the corresponding heat dissipation tube 3, and at the same time, the heat dissipation tube 3 is filled with quartz sand. The filled quartz sand also on the one hand facilitates the fixation of the insulating tube 2 in the heat dissipation tube 3, and on the other hand can transfer heat to the outside through the quartz sand.

[0042] The pipe plug 4 needs to be made of a high-temperature resistant insulating material, on which there are two through holes corresponding to the two lead-out ends of the corresponding resistor body 1. The pipe plug 4 is arranged on one side of the opening end in the corresponding heat dissipation pipe 3 and abuts against the insulating pipe 2, sealing and fixing the insulating pipe 2 in the corresponding heat dissipation pipe 3. The two lead-out ends of the resistor body 1 pass through the two through holes on the pipe plug 4 for connection. In order to prevent the thermal expansion of the pipe plug 4 from damaging the heat dissipation pipe 3, in this embodiment, the pipe plug 4 is preferably made of high-temperature resistant silica gel, and in other embodiments of the present utility model, other high-temperature resistant and insulating elastic materials can also be used as the pipe plug 4. The first lead-out ends and the second lead-out ends of the three resistor bodies 1 pass through the corresponding through holes of the corresponding pipe plugs 4 and are connected to achieve series connection.

[0043] The installation assembly includes an installation plate 7, three fixing plates 8, an external installation plate 9 and three groups of fasteners 10. Corresponding to the three heat dissipation pipes 3, there are three through holes on the installation plate 7 with an outer diameter adapted to the outer diameter of the three heat dissipation pipes 3. The installation plate 7 is sleeved on the outer side walls of the three heat dissipation pipes 3 near the pipe plug 4 through the three through holes, and at the same time, welding is carried out at the contact circle between the installation plate 7 and the heat dissipation pipes 3 for fixation. Corresponding to the heat dissipation pipes 3, there are through holes on the three fixing plates 8 with an outer diameter adapted to the outer diameter of the heat dissipation pipes 3. The three fixing plates 8 are sleeved on the outer side walls of the corresponding heat dissipation pipes 3 away from the pipe plug 4 through the through holes, and at the same time, welding is carried out at the contact circle between the fixing plates 8 and the heat dissipation pipes 3 for fixation. The three groups of fasteners 10 are used to connect and fix the three fixing plates 8 with the external installation plate 9. In this embodiment, connection and fixation are carried out through stainless steel bolts M8x20. Installation holes are respectively provided on the installation plate 7 and the external installation plate 9 for connection and fixation with external devices, that is, the three heat dissipation pipes 3 are connected side by side at equal intervals and connected and fixed with external devices through the installation plate 7, the three fixing plates 8, the external installation plate 9 and the three groups of fasteners 10.

[0044] In addition, the present utility model also has a through hole on the installation plate 7 with an outer diameter adapted to the outer diameter of the thermocouple installation pipe 5, through which the thermocouple installation pipe 5 is installed on the installation plate 7, and welding is carried out at the contact circle between the installation plate 7 and the thermocouple installation pipe 5 for fixation. In this embodiment, the thermocouple 6 is a PT100 thermocouple, which is installed in the thermocouple installation pipe 5 and contacts the inner side wall of the thermocouple installation pipe 5, used to detect the heat generation situation of the resistor body 1. This design avoids the direct contact between the thermocouple 6 and the resistor body 1 with high voltage, avoiding the risk of high-voltage leakage, and the structure is safer and more reliable. Preferably, in this embodiment, the thermocouple 6 is clamped and fixed on the inner side wall of the thermocouple installation pipe 5 through a stainless steel hoop. Two lead-out ends are provided at the end of the thermocouple 6 for connection with external devices to output the temperature value collected by the thermocouple 6.

[0045] Embodiment Two

[0046] The structure of this embodiment is basically the same as that of the first embodiment, except that the connection manner of the three resistive bodies 1 is different. In this embodiment, the first lead-out end of the first resistive body 1 is connected to the first lead-out end of the second resistive body 1, and the first lead-out end of the second resistive body 1 is connected to the first lead-out end of the third resistive body 1. At the same time, the second lead-out end of the first resistive body 1 is connected to the second lead-out end of the second resistive body 1, and the second lead-out end of the second resistive body 1 is connected to the second lead-out end of the third resistive body 1, which is used to make the three resistive bodies 1 in parallel to form a current path with a "U"-shaped flow direction.

[0047] As mentioned above, it is only used to illustrate the technical solution of the present invention, rather than to limit it. For those of ordinary professional skills in the art, the specific technical solution recorded in the above embodiment can be modified, or some of the technical features can be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution protected by the present invention.

Claims

1. A discharge resistor based on a spring-shaped continuous resistance wire, characterized in that: It comprises M resistors (1), M insulating tubes (2), M heat dissipation tubes (3) and M tube plugs (4), where M≥1; The resistor (1) is a spring-shaped continuous resistance wire, and one end of the M resistors (1) is respectively provided with two lead-out ends; The insulating tube (2) and the heat dissipation tube (3) are both made of high temperature resistant materials; The body of the resistor (1) is encapsulated in a corresponding insulating tube (2), and its two lead ends are exposed; One end of the heat dissipation tube (3) is closed, and the other end is open; the M insulating tubes (2) are respectively arranged in the corresponding heat dissipation tubes (3); the M pipe plugs (4) are all made of high-temperature resistant insulating material, and are provided with two through holes corresponding to the two lead-out ends of the corresponding resistor (1); the pipe plug (4) is arranged in the corresponding heat dissipation tube (3) on one side of the open end, and abuts against the insulating tube (2) to seal and fix the insulating tube (2) in the corresponding heat dissipation tube (3); the two lead-out ends of each resistor (1) pass through the two through holes on the corresponding pipe plug (4); When M=1, a mounting assembly is provided on the heat dissipation pipe (3) for connecting to an external device; when M>1, M heat dissipation pipes (3) are connected together through the mounting assembly and connected to the external device through the mounting assembly; and the M resistors (1) are connected in series or in parallel through corresponding lead-out terminals.

2. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 1, characterized in that: The mounting assembly comprises a mounting plate (7), M fixing plates (8), an external mounting plate (9) and M groups of fasteners (10); The mounting plate (7) is provided with M through holes corresponding to the outer diameters of the M heat dissipation tubes (3); the mounting plate (7) is sleeved on the outer side walls of the M heat dissipation tubes (3) near one end of the tube plug (4) through the M through holes, and is fixed by welding at the contact circle between the mounting plate (7) and the heat dissipation tube (3); The M fixing plates (8) are respectively provided with through holes matching the outer diameter of the heat dissipation pipe (3); the M fixing plates (8) are sleeved on the outer side wall of the corresponding heat dissipation pipe (3) away from the pipe plug (4) through the through holes, and are fixed by welding at the contact circle between the fixing plates (8) and the heat dissipation pipe (3); The M groups of fasteners (10) are used to fix the M fixing plates (8) to the external mounting plate (9); The mounting plate (7) and the external mounting plate (9) are respectively provided with mounting holes for connection and fixation with external equipment.

3. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 2, characterized in that: Also includes a thermocouple mounting tube (5) and a thermocouple (6); The mounting plate (7) is also provided with a through hole matched with the outer diameter of the thermocouple mounting tube (5), which is used to mount the thermocouple mounting tube (5) on the mounting plate (7) through the through hole and to be welded and fixed at the contact circle between the mounting plate (7) and the thermocouple mounting tube (5); The thermocouple (6) is fixedly installed in the thermocouple installation tube (5) and contacts the inner wall of the thermocouple installation tube (5) and is used to detect the heating condition of the resistor (1).

4. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 3, characterized in that: The thermocouple (6) is clamped and fixed on the inner wall of the thermocouple mounting tube (5) by a stainless steel clamp.

5. A discharge resistor based on a spring-shaped continuous resistance wire according to any one of claims 1 to 4, characterized in that: The insulating tube (2) is filled with quartz sand; The heat dissipation pipe (3) is filled with quartz sand.

6. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 1, characterized in that: The M is greater than 1, and the M heat dissipation pipes (3) are connected together in parallel and at equal distances through a mounting assembly.

7. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 6, characterized in that: The M=3.

8. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 7, characterized in that: The insulating tube (2) is a ceramic tube; The heat dissipation pipe (3) is a stainless steel pipe; The pipe plug (4) is made of high temperature resistant silicone.

9. A discharge resistor based on a spring-shaped continuous resistance wire according to claim 8, characterized in that: The resistor (1) is a spring-shaped continuous nickel-chromium alloy wire.

10. The discharge resistor based on spring-shaped continuous resistance wire according to claim 3, characterized in that: The thermocouple (6) is a PT100 thermocouple.

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