Processing method and equipment of super-long adjusting sleeve for photovoltaic pull cable

Abstract

The application discloses a processing method of an ultra-long adjusting amount adjusting sleeve for a photovoltaic cable, and belongs to the technical field of photovoltaic cables. The method is used for solving the technical problems of low material utilization, low processing efficiency and limited adjusting amount length of the adjusting sleeve in the prior art. The method comprises the following steps: placing a thread forming die in a pre-processed thread section of an adjusting sleeve blank pipe; synchronously inserting the pre-processed thread section of the adjusting sleeve blank pipe and the thread forming die into an annular extrusion die, extruding the pre-processed thread section, reducing the inner and outer diameters of the pre-processed thread section, and ensuring that the inner wall of the pre-processed thread section is tightly combined with the thread forming die until thread forming is completed; and rotating the thread forming die out of the pre-processed thread section to complete internal thread processing. The application further discloses a processing equipment of the ultra-long adjusting amount adjusting sleeve for the photovoltaic cable. The internal thread is processed by using the extrusion forming mode, so that the material utilization can be improved, the material cost can be reduced, and the problem of adjusting amount limitation can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cables, and more particularly to a method and equipment for processing an extra-long adjustment sleeve for a photovoltaic cable. Background Art

[0002] The photovoltaic cable adjustment sleeve is generally used to adjust the cable length during the installation of photovoltaic cables. It is an important component of photovoltaic cables. Figure 1 As shown, the structure of the adjusting sleeve A is a slender sleeve with internal threads B at both ends.

[0003] The conventional manufacturing method is to use a seamless steel pipe of appropriate size, turn the inner cavity of the sleeve, and then process the internal threads at both ends. This conventional processing technology has the following shortcomings:

[0004] 1. Low material utilization rate. The sleeve wall thickness needs to be cut according to the size of the internal thread B at both ends, and the inner cavity C in the middle of the sleeve needs to be cut away, resulting in material waste;

[0005] 2. The processing efficiency is low. During processing, the inner cavity in the middle of the sleeve needs to be cut. Generally, the inner diameter of the photovoltaic sleeve is small, and it is difficult to process slender blind holes, resulting in low processing efficiency.

[0006] 3. The adjustment amount of the adjustment sleeve is limited. Photovoltaic cables are generally long, usually 800-1000 meters. The longer the cable, the greater the manufacturing and installation errors, and the greater the adjustment amount required for the cable. The length of the adjustment sleeve is the key parameter for the cable to achieve adjustment. Due to the processing technology for slender holes, the length of the adjustment sleeve cannot be made very long. The existing conventional processing method can process an adjustment sleeve with a length of about 250-300mm at most, and the adjustment amount of the adjustment sleeve has great limitations. The current solution is that a photovoltaic cable needs to be equipped with two or more adjustment sleeves to meet the adjustment amount requirements of the cable. For example, the actual length to be adjusted is 500mm, but the current processing method cannot process a 500mm adjustment sleeve. In this case, two 260mm adjustment sleeves are needed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide a method for processing an extra-long adjustment sleeve for a photovoltaic cable.

[0008] The second purpose of the present invention is to provide a processing device for an extra-long adjustment sleeve for a photovoltaic cable.

[0009] In order to achieve the above-mentioned purpose one, the present invention provides a processing method for an extra-long adjustment sleeve for photovoltaic cables, wherein a thread forming mold is placed in the pre-processed threaded section of the adjusting sleeve blank tube; the pre-processed threaded section of the adjusting sleeve blank tube and the thread forming mold are simultaneously extended into the annular extrusion mold, and the pre-processed threaded section is extruded to reduce the inner and outer diameters of the pre-processed threaded section until the inner wall of the pre-processed threaded section is tightly fitted with the thread forming mold to ensure thread forming; the thread forming mold is unscrewed from the pre-processed threaded section to complete the internal thread processing.

[0010] As a further improvement, the following steps are specifically included:

[0011] Step S1. Select a seamless steel pipe of suitable specifications according to the size of the adjusting sleeve, and cut it into the required length to obtain an adjusting sleeve blank tube. Pre-processed threaded sections are provided at both ends of the adjusting sleeve blank tube.

[0012] Step S2. Install the adjusting sleeve blank tube, install the annular extrusion die on the outside of the adjusting sleeve blank tube, and arrange the annular extrusion die and the adjusting sleeve blank tube coaxially;

[0013] Step S3. A lubricating material is provided on the surface of the thread forming mold, and the thread forming mold is placed into the pre-processed threaded section of the adjusting sleeve blank tube;

[0014] Step S4. providing a lubricating material on the outer surface of the pre-processed threaded section of the adjusting sleeve blank tube;

[0015] Step S5. Synchronously moving the adjusting sleeve blank tube and the thread forming die so that the pre-processed thread segment and the thread forming die are synchronously extended into the annular extrusion die for extrusion, or moving the annular extrusion die so that the pre-processed thread segment and the thread forming die are synchronously extended into the annular extrusion die for extrusion, so that the inner wall of the pre-processed thread segment is threaded;

[0016] Step S6. Synchronously moving the adjusting sleeve blank tube and the thread forming die, or moving the annular extrusion die, to remove the pre-processed thread segment from the annular extrusion die;

[0017] Step S7: Rotate the thread forming die to withdraw the thread forming die from the pre-processed thread segment to complete the internal thread processing.

[0018] Furthermore, the thread forming die is a thread forming tap.

[0019] Furthermore, an extrusion hole with a large inlet and a small outlet is provided in the annular extrusion die.

[0020] Furthermore, an arc transition surface is provided between the inlet and the outlet of the extrusion hole.

[0021] Furthermore, the lubricating substance is any one of lubricating grease, lubricant, and molybdenum disulfide.

[0022] In order to achieve the above-mentioned second purpose, the present invention provides a processing equipment for an extra-long adjustment sleeve for photovoltaic cables, comprising a reaction frame, one end of the reaction frame is provided with a jack, the jack is provided with a clamp for clamping one end of the adjustment sleeve blank tube, and the other end of the reaction frame is provided with an annular extrusion die coaxially arranged with the adjustment sleeve blank tube; and also includes a thread forming die inserted into the pre-processed threaded section of the adjustment sleeve blank tube.

[0023] As a further improvement, the clamp is a three-jaw chuck or a four-jaw chuck.

[0024] Furthermore, the thread forming die is a thread forming tap.

[0025] Furthermore, an extrusion hole with a large inlet and a small outlet is provided in the annular extrusion die; and an arc transition surface is provided between the inlet and outlet of the extrusion hole.

[0026] Beneficial effects

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The present invention uses extrusion molding to process internal threads, which brings the beneficial effects of improved material utilization and reduced material costs; reduces turning processing and processing steps, which brings the beneficial effect of improved processing efficiency; can process adjustment sleeves with extra-long adjustment amounts. Theoretically, there is no limit to the length of the processed adjustment sleeve, which mainly depends on the length of the processed blank or the actual required adjustment length. For example, the length of the currently used adjustment sleeve reaches 500mm. The method of the present invention can be processed at one time, and only one adjustment sleeve is needed to meet the requirements, which brings the beneficial effect of solving the problem of the adjustment amount limitation of a single adjustment sleeve of the photovoltaic cable, and at the same time can save adjustment time and improve installation adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of an adjusting sleeve processed by the prior art;

[0030] Figure 2 It is a structural schematic diagram of the device of the present invention;

[0031] Figure 3 A schematic diagram of the structure of the adjusting sleeve processed by the present invention;

[0032] Figure 4 This is a schematic diagram of the guide sleeve structure of the device of the present invention.

[0033] Among them: 1-adjusting sleeve blank tube, 2-pre-processed thread segment, 3-thread forming die, 4-annular extrusion die, 5-internal thread, 6-extrusion hole, 7-arc transition surface, 8-reaction frame, 9-jack, 10-clamp, 11-adjusting sleeve, 12-guide sleeve. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0035] See Figures 2 to 4 A processing method for an ultra-long adjustment sleeve for a photovoltaic cable comprises placing a thread forming die 3 in a pre-processed threaded section 2 of an adjusting sleeve blank tube 1; simultaneously extending the pre-processed threaded section 2 of the adjusting sleeve blank tube 1 and the thread forming die 3 into an annular extrusion die 4, extruding the pre-processed threaded section 2 to reduce the inner and outer diameters of the pre-processed threaded section 2 until the inner wall of the pre-processed threaded section 2 fits tightly with the thread forming die 3 to ensure thread formation; and unscrewing the thread forming die 3 from the pre-processed threaded section 2 to complete the processing of the internal thread 5.

[0036] The specific steps include:

[0037] Step S1. Select a seamless steel pipe of suitable specifications according to the size of the adjusting sleeve, and cut it according to the length requirement to obtain an adjusting sleeve blank tube 1, and set pre-processed threaded sections 2 at both ends of the adjusting sleeve blank tube 1;

[0038] Step S2. Install the adjusting sleeve blank tube 1, and install the annular extrusion die 4 on the outside of the adjusting sleeve blank tube 1, so that the annular extrusion die 4 and the adjusting sleeve blank tube 1 are coaxially arranged;

[0039] Step S3. A lubricating material is provided on the surface of the thread forming mold 3, and the thread forming mold 3 is placed into the pre-processed thread segment 2 of the adjusting sleeve blank tube 1;

[0040] Step S4. providing a lubricating substance on the outer surface of the pre-processed threaded section 2 of the adjusting sleeve blank tube 1;

[0041] Step S5. Synchronously moving the adjusting sleeve blank tube 1 and the thread forming die 3 so that the pre-processed thread segment 2 and the thread forming die 3 are simultaneously extended into the annular extrusion die 4 for extrusion, or moving the annular extrusion die 4 so that the pre-processed thread segment 2 and the thread forming die 3 are simultaneously extended into the annular extrusion die 4 for extrusion, so that the inner wall of the pre-processed thread segment 2 is threaded;

[0042] Step S6. Synchronously moving the adjusting sleeve blank tube 1 and the thread forming die 3, or moving the annular extrusion die 4, to withdraw the pre-processed thread segment 2 from the annular extrusion die 4;

[0043] Step S7 . Rotate the thread forming die 3 to withdraw the thread forming die 3 from the pre-processed thread segment 2 , thereby completing the processing of the internal thread 5 .

[0044] The thread forming die 3 is a thread forming tap. An extrusion hole 6 with a large inlet and a small outlet is provided in the annular extrusion die 4, and an arc transition surface 7 is provided between the inlet and outlet of the extrusion hole 6. The lubricating material is any one of lubricating grease, lubricant, and molybdenum disulfide.

[0045] By using extrusion molding to process the internal thread, material utilization can be improved, material cost can be reduced, turning and processing steps can be reduced, processing efficiency can be improved, and adjustment sleeves with extra-long adjustment amounts can be processed to solve the problem of limited adjustment amount of a single adjustment sleeve of a photovoltaic cable.

[0046] A processing apparatus for an extra-long adjustable sleeve for photovoltaic cables includes a reaction frame 8, one end of which is equipped with a jack 9. The jack 9 is equipped with a clamp 10 for clamping one end of the adjusting sleeve blank tube 1. The other end of the reaction frame 8 is equipped with an annular extrusion die 4 coaxially arranged with the adjusting sleeve blank tube 1. The apparatus also includes a thread forming die 3 inserted into the pre-machined threaded section 2 of the adjusting sleeve blank tube 1. The clamp 10 is a three-jaw or four-jaw chuck. The thread forming die 3 is a thread forming tap. The annular extrusion die 4 is provided with an extrusion hole 6 with a large inlet and a small outlet. A circular arc transition surface 7 is provided between the inlet and outlet of the extrusion hole 6.

[0047] Furthermore, a guide sleeve 12 is provided in the reaction frame 8. When processing an adjustment sleeve with an extra-long adjustment amount, the adjustment sleeve blank 1 passes through the guide sleeve 12 to improve the processing stability. Figure 4 shown.

[0048] The process of processing using the above equipment:

[0049] 1. Lightly clamp one end of the adjusting sleeve blank tube 1 in the fixture 10 to ensure that the adjusting sleeve blank tube 1 is aligned with the annular extrusion die 4;

[0050] 2. Place the thread forming die 3 in the pre-processed thread section 2 of the adjusting sleeve blank tube 1. Be sure to apply lubricating grease on the surface of the thread forming die 3 first.

[0051] 3. Apply extrusion grease to the outer surface of the pre-processed threaded section 2 of the adjusting sleeve blank tube 1, start the jack 9, and push one end of the adjusting sleeve blank tube 1 into the annular extrusion die 4 through the action of the jack 9 to extrude it, so that the inner diameter and outer diameter of the adjusting sleeve blank tube 1 shrink inward until the inner wall of the adjusting sleeve blank tube 1 is tightly fitted with the thread forming die 3, and the thread is formed;

[0052] 4. Tighten the clamp 10 to ensure that the clamp 10 clamps the adjusting sleeve blank tube 1, start the jack 9 to retreat, withdraw the adjusting sleeve blank tube 1 from the annular extrusion die 4, rotate the thread forming die 3, withdraw the thread forming die 3 from the pre-processed thread section 2, and complete the internal thread processing of one end of the adjusting sleeve blank tube 1;

[0053] 5. Remove the adjusting sleeve blank tube 1 from the fixture 10, turn the direction, and process the internal thread of the other end according to the above steps 1 to 4 to complete the processing of the adjusting sleeve 11. The processed adjusting sleeve 11 is as shown in FIG. Figure 3 shown.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for processing an extra-long adjustment sleeve for photovoltaic cables, characterized in that: A thread forming die (3) is placed in the pre-processed thread section (2) of the regulating sleeve blank tube (1); the pre-processed thread section (2) of the regulating sleeve blank tube (1) and the thread forming die (3) are simultaneously extended into the annular extrusion die (4), and the pre-processed thread section (2) is extruded to reduce the inner and outer diameters of the pre-processed thread section (2) until the inner wall of the pre-processed thread section (2) is tightly fitted with the thread forming die (3) to ensure thread forming; the thread forming die (3) is unscrewed from the pre-processed thread section (2) to complete the internal thread (5) processing; The specific steps include: Step S1. Select a seamless steel pipe of suitable specifications according to the size of the adjusting sleeve, and cut it according to the required length to obtain an adjusting sleeve blank tube (1), and set pre-processed thread sections (2) at both ends of the adjusting sleeve blank tube (1); Step S2. Install the adjusting sleeve blank tube (1), and install the annular extrusion die (4) on the outer side of the adjusting sleeve blank tube (1), so that the annular extrusion die (4) and the adjusting sleeve blank tube (1) are coaxially arranged; Step S3. providing a lubricating substance on the surface of the thread forming mold (3), and placing the thread forming mold (3) into the pre-processed thread section (2) of the adjusting sleeve blank tube (1); Step S4. providing a lubricating substance on the outer surface of the pre-processed threaded section (2) of the adjusting sleeve blank tube (1); Step S5. Synchronously moving the adjusting sleeve blank tube (1) and the thread forming die (3) so that the pre-processed thread segment (2) and the thread forming die (3) are synchronously extended into the annular extrusion die (4) for extrusion, or moving the annular extrusion die (4) so ​​that the pre-processed thread segment (2) and the thread forming die (3) are synchronously extended into the annular extrusion die (4) for extrusion, so that the inner wall of the pre-processed thread segment (2) is thread-formed; Step S6. Synchronously moving the adjusting sleeve blank tube (1) and the thread forming die (3), or moving the annular extrusion die (4), to withdraw the pre-processed thread segment (2) from the annular extrusion die (4); Step S7. Rotate the thread forming mold (3) to withdraw the thread forming mold (3) from the pre-processed thread segment (2), thereby completing the processing of the internal thread (5); An extrusion hole (6) having a large inlet and a small outlet is provided in the annular extrusion die (4); The processing equipment for realizing the processing method comprises a reaction frame (8), one end of the reaction frame (8) is provided with a jack (9), the jack (9) is provided with a clamp (10) for clamping one end of the adjusting sleeve blank tube (1), the other end of the reaction frame (8) is provided with an annular extrusion die (4) coaxially arranged with the adjusting sleeve blank tube (1); and further comprises a thread forming die (3) inserted into the pre-processed threaded section (2) of the adjusting sleeve blank tube (1); A guide sleeve (12) is provided in the reaction frame (8). When processing an adjustment sleeve with an extra-long adjustment amount, the adjustment sleeve blank (1) passes through the guide sleeve (12) to improve the processing stability.

2. The method for processing an extra-long adjustment sleeve for photovoltaic cables according to claim 1, characterized in that: The thread forming die (3) is a thread forming tap.

3. The method for processing an extra-long adjustment sleeve for photovoltaic cables according to claim 1, characterized in that: An arc transition surface (7) is provided between the inlet and outlet of the extrusion hole (6).

4. The method for processing an extra-long adjustment sleeve for photovoltaic cables according to claim 1, characterized in that: The lubricating substance is any one of lubricating grease, lubricant, and molybdenum disulfide.

5. The method for processing an extra-long adjustment sleeve for photovoltaic cables according to claim 1, characterized in that: The clamp (10) is a three-jaw chuck or a four-jaw chuck.

6. The method for processing an extra-long adjustment sleeve for photovoltaic cables according to claim 1, characterized in that: The thread forming die (3) is a thread forming tap.

7. The method for processing an extra-long adjustment sleeve for photovoltaic cables according to claim 1, characterized in that: An extrusion hole (6) with a large inlet and a small outlet is provided in the annular extrusion die (4); and an arc transition surface (7) is provided between the inlet and the outlet of the extrusion hole (6).

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