An insulation detection cabinet for reduction furnace silicon core position detection

Abstract

The utility model relates to the polycrystal silicon production technical field especially is related to a kind of for reduction furnace silicon core position detection insulation detection cabinet, including insulation detection cabinet body, several interval settings insulation support are set in the insulation detection cabinet body, and several interval settings insulators are respectively equipped on each insulation support;Each insulator is used to fix a detection line;Reduction furnace is provided with six phases in total, and each phase contains several phase sequences, and the detection line and phase sequence one-to-one correspondence;One end of each detection line is connected with corresponding insulator through wire nose, and the other end is connected with silicon core lead cable and copper bar of the copper bar of the outlet side of press-out cabinet through wire nose, and the end of silicon core lead cable far from detection line is connected with the furnace bottom tray of reduction furnace. Through the insulation detection cabinet, the efficiency of silicon core position detection is high, and the opportunity of operator directly contacting high-voltage components is reduced, thereby greatly reducing the security risk.

Description

Technical Field

[0001] This utility model relates to the field of polysilicon production technology, and in particular to an insulation detection cabinet for detecting the position of silicon cores in a reduction furnace. Background Technology

[0002] In the production of polycrystalline silicon using the modified Siemens process, the silicon core, which serves as the deposition carrier, requires breakdown treatment during the initial stage of polycrystalline silicon deposition. Different breakdown methods are used to make the silicon core conductive. Then, in its conductive state, as the applied current gradually increases, the temperature of the silicon core rises, eventually reaching the optimal reaction temperature range for polycrystalline silicon deposition. Under these temperature conditions, a highly efficient vapor-phase deposition reaction occurs in the reduction furnace, thereby achieving the stable production of polycrystalline silicon products.

[0003] The silicon core is mounted on the reduction furnace chassis and its breakdown is achieved by applying high voltage through a high-voltage pressurization system. Before and during the breakdown operation, the insulation performance of the silicon core must be tested to determine the accuracy of its mounting position on the reduction furnace chassis. Significant deviations in the initial mounting position may lead to poor breakdown results or even abnormal situations such as core tipping during the breakdown process, affecting subsequent deposition processes and product quality.

[0004] However, current technologies typically rely on operators manually moving frequently inside and outside the high-voltage testing cabinet and touching the high-voltage leads to complete the silicon core insulation test. This method is not only inefficient but also poses significant safety risks, easily leading to electric shock accidents, and is detrimental to the safety and automation of on-site operations. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model proposes an insulating detection cabinet for detecting the position of silicon cores in a reduction furnace. This cabinet improves the efficiency of silicon core position detection and reduces the opportunity for operators to directly contact high-voltage components, thereby significantly reducing safety risks.

[0006] This utility model is achieved by adopting the following technical solution:

[0007] An insulation detection cabinet for detecting the position of silicon cores in a reduction furnace includes an insulation detection cabinet body. The cabinet body contains several spaced-apart insulation supports, each with several spaced-apart insulators. Each insulator is used to fix a detection line. The reduction furnace has six phases, each containing several phase sequences, and the detection lines correspond one-to-one with the phase sequences. One end of each detection line is connected to the corresponding insulator via a lug, and the other end is connected to the silicon core lead cable and the copper busbar on the output side of the pressure-testing cabinet via a lug. The end of the silicon core lead cable furthest from the detection line is connected to the furnace bottom plate of the reduction furnace.

[0008] An insulating sleeve is wrapped around the outer periphery of each detection line.

[0009] A screw is provided at the top of the insulator, and the wire nose at the end of the detection line is sleeved on the screw and locked and fixed by a nut.

[0010] An insulating cap is provided on the insulator, and the insulating cap is used to cover the exposed parts of the screw and the nut.

[0011] The phase sequences corresponding to the multiple detection lines provided on each insulating support column belong to the same phase.

[0012] Each detection line is connected to the corresponding insulating support column through a first connecting member.

[0013] The multiple detection lines belonging to the same phase are tied and fixed through a second connecting member to form six independent detection line groups.

[0014] It further includes insulating layers corresponding to the six detection line groups one by one, which are used to wrap the corresponding detection line groups.

[0015] Support rods are respectively provided at both ends of the insulating support column, and the support rods are fixedly connected to the insulating detection cabinet body; multiple first positioning holes are provided on the support rods; the end of the insulating support column is matched with the first positioning holes through a first locking member to achieve detachable connection with the support rods.

[0016] Both ends of the support rod are connected to the insulating detection cabinet body through mounting rods; the mounting rods are arranged along the height direction of the insulating detection cabinet body, and multiple second positioning holes are provided at intervals thereon; the end of the support rod is matched with the second positioning holes through a second locking member to achieve detachable connection with the mounting rods.

[0017] Compared with the prior art, the beneficial effects of the present utility model are manifested in:

[0018] 1. During detection, the operator only needs to directly open the insulating detection cabinet to quickly carry out the measurement work. Specifically, the phase sequence is determined above the insulators of each phase sequence through a multimeter and a high-voltage pressure test cabinet to ensure that each phase sequence corresponds one by one. The resistance value of the entire phase sequence can be measured by fixing with a clamp at the L terminal (positive electrode) and the N terminal (negative electrode). The adjacent two pairs are fixed by clamping parts to measure the resistance value of this pair. For example, one end of the insulating detection clamp is clamped on the insulator corresponding to the detection line with the phase sequence of B11L, and the other end is clamped on the insulator corresponding to the detection line with the phase sequence of B12, then the resistance value of this pair can be measured. Similarly, the resistance values of the remaining pairs and the total resistance value can all be measured. Through the detection of the insulation resistance value, it can be clearly judged whether the installation of the silicon core in the reduction furnace is correct. If the sum of the resistance values of the pairs is approximately equal to the total resistance value of this phase, the detection is qualified; otherwise, the resistance value detection is unqualified and corresponding inspections need to be carried out.

[0019] Traditional testing methods require operators to frequently move inside and outside the electrical cabinet and come into contact with high-voltage leads, posing significant safety risks. This insulation testing cabinet greatly simplifies the cumbersome lead connection and disassembly steps of traditional methods, thus significantly improving testing efficiency. Furthermore, by integrating the leads and streamlining the testing process, this invention reduces the operator's direct contact with high-voltage components, thereby significantly lowering safety risks.

[0020] 2. In this utility model, an insulating sleeve is wrapped around the outer periphery of each detection line, which can improve the insulation effect of the detection line.

[0021] 3. The screw, nut, and lugs allow the test wire to be better fixed to the insulator.

[0022] 4. The insulating cap prevents tip discharge accidents caused by protruding parts.

[0023] 5. The phase sequence corresponding to the multiple detection lines set on each insulating support belongs to the same phase, which facilitates better storage and makes the wiring neater.

[0024] 6. Each test line is connected to the corresponding insulating support via the first connector, which facilitates the improvement of the stability of the test line connection.

[0025] 7. Multiple test lines belonging to the same phase are bound together and fixed by the second connector to form six independent test line groups, which simplifies wiring management and facilitates better testing.

[0026] 8. The addition of an insulation layer can further improve the insulation effect.

[0027] 9. The position of the insulating support can be flexibly adjusted by the first locking member cooperating with the first positioning hole, and the position of the support rod can be better adjusted by the second locking member cooperating with the second positioning hole, thereby further adjusting the position of the insulating support. It has a wide range of applications. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a simplified diagram illustrating the connection between the insulation testing cabinet, furnace chassis, and pressure testing cabinet in this utility model.

[0031] Marked in the image:

[0032] 1. Insulation testing cabinet body; 2. Insulation support column; 3. Insulator; 4. Testing line; 5. Silicon core lead cable; 6. Pressure testing cabinet; 7. Furnace bottom plate; 8. Insulation sleeve; 9. First connector; 10. Second connector; 11. Insulation layer; 12. Support rod; 13. First positioning hole; 14. First locking piece; 15. Mounting rod; 16. Second positioning hole; 17. Second locking piece; 18. Insulation cap. Detailed Implementation

[0033] Example 1

[0034] As a basic embodiment of this utility model, the utility model includes an insulation detection cabinet for detecting the position of silicon cores in a reduction furnace, comprising an insulation detection cabinet body 1. The insulation detection cabinet body 1 is provided with a plurality of spaced-apart insulation supports 2, and each insulation support 2 is provided with a plurality of spaced-apart insulators 3. Each insulator 3 is used to fix a detection line 4. The reduction furnace has a total of six phases, each phase containing a plurality of phase sequences, and the detection lines 4 correspond one-to-one with the phase sequences. One end of each detection line 4 is connected to the corresponding insulator 3 via a lug, and the other end is connected to the silicon core lead cable 5 and the copper busbar on the output side of the pressure cabinet 6 via a lug. The end of the silicon core lead cable 5 away from the detection line 4 is connected to the furnace bottom plate 7 of the reduction furnace.

[0035] When it is necessary to detect the position of the silicon core in the reduction furnace, simply clamp the fixture onto the corresponding insulator 3 to measure the resistance of that pair. By adding the resistance of the pairs together and comparing it with the total resistance of the phase, it can be clearly determined whether the silicon core in the reduction furnace is installed correctly.

[0036] Example 2

[0037] In a preferred embodiment of this utility model, the utility model includes an insulation detection cabinet for detecting the position of silicon cores in a reduction furnace, comprising an insulation detection cabinet body 1. The insulation detection cabinet body 1 is provided with a plurality of spaced-apart insulation supports 2, and each insulation support 2 is provided with a plurality of spaced-apart insulators 3. Each insulator 3 is used to fix a detection wire 4. Each detection wire 4 is covered with an insulating sleeve 8.

[0038] The reduction furnace has a total of six phases, each containing several phase sequences, and the detection lines 4 correspond one-to-one with the phase sequences. One end of each detection line 4 is connected to the corresponding insulator 3 via a lug, and the other end is connected to the silicon core lead cable 5 and the copper busbar on the output side of the pressure-testing cabinet 6 via a lug. The end of the silicon core lead cable 5 away from the detection line 4 is connected to the furnace bottom plate 7 of the reduction furnace. The insulator 3 has a screw on its top, and the lug at the end of the detection line 4 is fitted onto the screw and secured with a nut. The insulator 3 has an insulating cap 18, which covers the exposed parts of the screw and the nut.

[0039] Example 3

[0040] In another preferred embodiment of this utility model, the utility model includes an insulation detection cabinet for detecting the position of silicon cores in a reduction furnace, comprising an insulation detection cabinet body 1. The insulation detection cabinet body 1 is provided with a plurality of spaced-apart insulation supports 2, and each insulation support 2 is provided with a plurality of spaced-apart insulators 3. Each insulator 3 is used to fix a detection line 4. The reduction furnace has a total of six phases, each phase containing a plurality of phase sequences, and the detection lines 4 correspond one-to-one with the phase sequences.

[0041] One end of each detection wire 4 is connected to the corresponding insulator 3 via a lug, and the other end is connected to the silicon core lead cable 5 and the copper busbar on the outgoing side of the pressure testing cabinet 6 via a lug. More specifically, the phase sequence corresponding to the multiple detection wires 4 set on each insulating support 2 belongs to the same phase, that is, the phase sequence corresponding to the detection wires 4 connected to the insulator 3 on each insulating support 2 belongs to the same phase, and the multiple detection wires 4 belonging to the same phase can be bound and fixed by the second connector 10 to form six independent detection wire groups. Each detection wire group is also wrapped with a corresponding insulation layer 11.

[0042] The end of the silicon core lead cable 5 furthest from the detection line 4 is connected to the furnace bottom plate 7 of the reduction furnace.

[0043] Example 4

[0044] In another preferred embodiment of this utility model, the utility model includes an insulation detection cabinet for detecting the position of silicon cores in a reduction furnace, comprising an insulation detection cabinet body 1. The reduction furnace is connected to a pressure testing cabinet 6, used to break down the silicon cores mounted on the furnace bottom plate 7 of the reduction furnace. The silicon cores on the furnace bottom plate 7 of the reduction furnace have a total of six phases: A1, A2, B1, B2, C1, and C2, each phase containing several phase sequences. Specifically, the A1 phase has seven phase sequences, including A11L, A12, A13, A14, A15, A16, and A17N; the A2 phase has five phase sequences, including A21L, A22, A23, A24, and A25N; the B1 phase has five phase sequences, including B11L, B12, B13, B14, and B15N; the B2 phase has five phase sequences, including B21L, B22, B23, B24, and B25N; the C1 phase has seven phase sequences, including C11L, C12, C13, C14, C15, C16, and C17N; and the C2 phase has five phase sequences, including C21L, C22, C23, C24, and C25N. Here, L represents the positive electrode, and N represents the negative electrode.

[0045] Refer to the instruction manual appendix Figure 1The insulation testing cabinet body 1 is equipped with four mounting rods 15, six support rods 12, and eight insulating supports 2. The mounting rods 15 are arranged along the height of the insulation testing cabinet body 1 and are located around the perimeter of the body. Each mounting rod 15 has multiple second positioning holes 16 spaced apart. The support rods 12 are arranged along the width of the insulation testing cabinet body 1, and both ends of each support rod 12 are engaged with the second positioning holes 16 via second locking elements 17, achieving a detachable connection with the mounting rods 15. Each support rod 12 has multiple first positioning holes 13. The insulating supports 2 are arranged along the length of the insulation testing cabinet body 1, and both ends of each insulating support 2 are engaged with the first positioning holes 13 via first locking elements 14, achieving a detachable connection with the support rods 12. The second locking elements 17 and the first locking elements 14 can be designed as bolts and nuts.

[0046] The insulation testing cabinet body 1 is designed with a three-layer structure, including a first layer, a second layer, and a third layer. The first layer has three spaced-apart insulating supports 2, the second layer has two spaced-apart insulating supports 2, and the third layer has three spaced-apart insulating supports 2. The spacing between the insulating supports 2 is based on the voltage level for insulation protection. Specifically, the distance between the insulating supports 2 is greater than 20 centimeters. The specific spacing can be adjusted by adjusting the vertical height of the support rod 12 and the position of the insulating supports 2 on the support rod 12.

[0047] Each insulating support post 2 is equipped with several insulators 3 spaced apart. Each insulator 3 is used to fix a detection line 4, preventing the detection line 4 from falling off. The insulators 3 also prevent equipment damage caused by excessive voltage during pressurization or operation, providing insulation protection. The detection lines 4 correspond one-to-one with the phase sequence. Specifically, the three insulating supports 2 of the first layer can be equipped with five insulators 3, three insulators 3, and four insulators 3 respectively, corresponding to the phase sequence B11L, B12, B13, B14, B15N, the phase sequence C11L, C12, C13, and the phase sequence C14, C15, C16, C17N. The two insulating supports 2 of the second layer can each be equipped with five insulators 3, corresponding to the phase sequence C21L, C22, C23, C24, C25N and the phase sequence A21L, A22, A23, A24, A25N respectively. The three insulating supports 2 of the third layer can be equipped with five insulators 3, three insulators 3, and four insulators 3 in sequence, corresponding to the phase sequence B21L, B22, B23, B24, B25N, the phase sequence A11L, A12, A13, and the phase sequence A14, A15, A16, A17N, respectively. This design ensures that the detection lines 4 fixed to the multiple insulators 3 on each insulating support 2 belong to the same phase.

[0048] Refer to the instruction manual appendix Figure 2 Each detection line 4 has one end connected to the corresponding insulator 3 via a lug, and the other end connected to the silicon core lead cable 5 and the copper busbar on the output side of the pressure testing cabinet 6 via a lug. The end of the silicon core lead cable 5 away from the detection line 4 is connected to the furnace bottom plate 7 of the reduction furnace. In the prior art, the output side of the pressure testing cabinet 6 is a copper busbar with holes at the ends. The silicon core lead cable 5 is fixed through the holes with bolts and then led to the furnace bottom plate 7 for pressure testing. In this invention, the bolts at this location are removed, and the lugs at the ends of the detection lines 4 are used for bolt fixing. One detection line 4 is used for each phase sequence, and one lug is made to fix each phase sequence separately. The top of the insulator 3 is provided with a screw rod, and the lugs at the ends of the detection lines 4 are fitted onto the screw rod and locked in place with nuts. The insulator 3 is provided with an insulating cap 18, which is used to cover the exposed parts of the screw rod and nuts.

[0049] Furthermore, each detection line 4 is covered with an insulating sleeve 8, and each detection line 4 is connected to the corresponding insulating support 2 via a first connector 9. Even further, multiple detection lines 4 belonging to the same phase can be wrapped with an insulating layer 11 and then secured with a second connector 10 to form six independent groups of detection lines.

[0050] During testing, operators can quickly begin measurements simply by opening the insulation testing cabinet. Specifically, after the insulation testing cabinet is manufactured, the phase sequence is determined using a multimeter and a high-voltage testing cabinet 6 above each phase insulator 3, ensuring a one-to-one correspondence between each phase sequence. The resistance of the entire phase sequence can be measured by fixing the clamps of the testing device to the L and N ends. Adjacent pairs are clamped together to measure their resistance. For example, clamping the insulation testing clamp to B11L and the other end to B12 allows for measurement of the resistance of that pair. Similarly, the resistance of other pairs and the total resistance can be measured. By testing the insulation resistance, it is possible to clearly determine whether the silicon core installation in the reduction furnace is correct. The sum of the resistance values ​​of each pair is approximately equal to the total resistance of that phase. If the resistance test fails, production is notified for further inspection. This process greatly simplifies the cumbersome lead connection and disassembly steps of traditional testing methods, thus significantly improving the efficiency of the testing work.

[0051] In summary, any other corresponding modifications made by those skilled in the art based on the technical solution and concept of this utility model without creative mental effort after reading this utility model document are all within the scope of protection of this utility model.

Claims

1. An insulation detection cabinet for reduction furnace silicon core position detection, characterized by: The system includes an insulation testing cabinet body (1), which is equipped with several spaced insulation pillars (2). Each insulation pillar (2) is equipped with several spaced insulators (3). Each insulator (3) is used to fix a test line (4). The reduction furnace has a total of six phases, each phase containing several phase sequences. The test lines (4) correspond one-to-one with the phase sequences. One end of each test line (4) is connected to the corresponding insulator (3) through a lug, and the other end is connected to the silicon core lead cable (5) and the copper busbar on the output side of the pressure cabinet (6) through a lug. The end of the silicon core lead cable (5) away from the test line (4) is connected to the furnace bottom plate (7) of the reduction furnace.

2. The insulation detection cabinet for reducing furnace silicon core position detection according to claim 1, characterized in that: Each test line (4) is covered with an insulating sleeve (8) around its perimeter.

3. The insulated detection cabinet for reducing furnace silicon core position detection according to claim 2, characterized in that: The insulator (3) is provided with a screw at the top, and the wire lug at the end of the detection line (4) is fitted onto the screw and locked in place by a nut.

4. The insulation detection cabinet for reducing furnace silicon core position detection according to claim 3, characterized in that: The insulator (3) is provided with an insulating cap (18), which is used to cover the exposed parts of the screw and the nut.

5. The insulation detection cabinet for position detection of a silicon core in a reduction furnace according to claim 1 or 4, characterized in that: The phase sequence corresponding to the multiple detection lines (4) set on each insulating support (2) belongs to the same phase.

6. An insulation detection cabinet for reducing furnace silicon core position detection according to claim 5, characterized in that: Each test line (4) is connected to the corresponding insulating post (2) via the first connector (9).

7. An insulation detection cabinet for reducing furnace silicon core position detection according to claim 6, characterized in that: Multiple detection lines (4) belonging to the same phase are bound together by the second connector (10) to form six independent detection line groups.

8. An insulation detection cabinet for reducing furnace silicon core position detection according to claim 7, characterized in that: It also includes an insulation layer (11) corresponding to each of the six sets of test lines, used to wrap the corresponding test lines.

9. The insulated detection cabinet for reduction furnace silicon core position detection according to claim 1, characterized in that: The insulating support column (2) is provided with support rods (12) at both ends. The support rods (12) are fixedly connected to the insulating test cabinet body (1). The support rods (12) are provided with multiple first positioning holes (13). The end of the insulating support column (2) is engaged with the first positioning hole (13) through the first locking member (14) to achieve a detachable connection with the support rod (12).

10. An insulation detection cabinet for reducing furnace silicon core position detection according to claim 9, characterized in that: The two ends of the support rod (12) are connected to the insulation testing cabinet body (1) through the mounting rod (15); the mounting rod (15) is set along the height direction of the insulation testing cabinet body (1), and a plurality of second positioning holes (16) are provided on it at intervals; the end of the support rod (12) cooperates with the second positioning hole (16) through the second locking member (17) to realize the detachable connection with the mounting rod (15).

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