Glue return prevention, magnetism taking stabilization and positioning and guiding integrated device

Abstract

The utility model provides an integrated device capable of preventing glue return, stabilizing magnetism taking and positioning and guiding. The device is composed of a wire harness (1), a guide glue return prevention device (2), a magnetic wire harness forming device (3), a magnetic field taking device (4), a cooling device (5) and a positioning guide device (6). A wire harness (1) sequentially penetrates through the guiding and glue returning preventing device (2), the magnetic wire harness forming device (3), the magnetic field taking device (4), the cooling device (5) and the positioning and guiding device (6). The wire harness (1) is a bare wire harness or a wire harness (1) which is packaged twice or multiple times. According to the utility model, the wiring harness is tightly matched through the positioning block, and the guide anti-glue-return device is controlled to tightly connect the positioning block with the magnetic wiring harness forming device, so that the leakage of molten magnetic plastic is prevented, the utilization rate of the magnetic plastic is improved, and the wrapping property of the wiring harness is improved. According to the utility model, the leakage phenomenon of molten magnetic plastic cement is avoided, the magnetic field intensity of the magnetic field is oriented, and the wiring harness is uniformly coated by the magnetic plastic cement.

Description

Technical Field

[0001] The utility model relates to the field of equipment, and in particular to an integrated device for preventing glue return, stabilizing magnetic field and positioning and guiding. Background Art

[0002] With the rapid development of my country's economy, smart wearables, artificial intelligence, building decoration, and medical protection have become a large industrial chain in my country, with fierce market competition, and wire harnesses are an important part. At present, the packaging form of domestic wire harnesses is mainly extrusion, and the resulting wire harness products are prone to many problems. For example: mobile phone data cables become entangled when stored, and even cause safety problems; installing exposed wiring at home will affect the overall appearance of the room.

[0003] Magnetic plastic is a new type of polymer material that has been widely used in many fields such as medicine, culture, furniture, toys, etc. The molten magnetic plastic is combined with the wire harness using extrusion molding technology. After being treated with an oriented magnetic field to stabilize the magnetism, a flexible magnetic wire harness product is made, which allows the wire harness to have a stable magnetic field direction and magnetic induction intensity, so that the wire harness will not be tangled during use, and the wire harness can be installed on the wall without using sticky hooks, etc., to achieve the purpose of beauty and convenient storage. However, in the process of magnetic wire harness molding technology, there will be problems such as leakage of molten magnetic plastic, unstable magnetic field strength of the oriented magnetic field, and uneven coating of the magnetic plastic on the wire harness. Since the existing technology cannot meet the current situation, there is an urgent need for a device that does not cause leakage of molten magnetic plastic, uniform magnetic field strength of the oriented magnetic field, and uniform coating of the magnetic plastic on the wire harness. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide an integrated device for preventing glue return, stabilizing magnetic field and positioning and guiding.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model relates to an integrated device for preventing glue return, magnetic stabilization and positioning guidance, which is composed of a wire harness 1, a guiding anti-glue return device 2, a magnetic wire harness forming device 3, a magnetic field magnetic device 4, a cooling device 5, and a positioning guidance device 6;

[0007] The wire harness 1 passes through the guiding anti-return glue device 2, the magnetic wire harness forming device 3, the magnetic field magnetism taking device 4, the cooling device 5, and the positioning guiding device 6 in sequence;

[0008] The wire harness 1 is a bare wire harness or a wire harness 1 that is packaged twice or multiple times.

[0009] The guiding anti-glue return device 2 involved in the utility model adopts a positioning block 12 to tightly match the wire harness 1, and controls the guiding anti-glue return device 2 to tightly connect the positioning block 12 with the magnetic wire harness forming device 3, so as to prevent the molten magnetic plastic from leaking during the coating process of the wire harness 1, thereby improving the utilization rate of the magnetic plastic and improving the coatability of the wire harness.

[0010] The magnetic field magnetization device 4 involved in the utility model uses the magnetic properties generated by the magnet box 13 to conduct magnetism through the magnetizer 14. The magnetic field strength generated on the magnetic end surface 15 is between 3000 gauss and 15000 gauss. Under the action of the high magnetic field, the magnetic direction of the wire harness 1 will be arranged in a directional manner, and the magnetic field strength of the magnetic line bundle will reach between 1000 gauss and 12000 gauss. The wire harness 1 can be magnetized, and the magnetic field strength of the magnetic line of force and the stable magnetic field direction can be increased, thereby improving the utilization rate of the permanent magnet.

[0011] The positioning guide device 6, the guiding anti-return glue device 2 and the extruder die outlet 8 of the utility model are on the same axis. The wire harness 1 is clamped by friction force through the guiding anti-return glue device 2 and the positioning block 12 in the positioning guide device 6, so that the axial size error of the magnetic wire harness can be less than 2%.

[0012] Preferably, the cross section of the wire harness 1 is circular, with a diameter of 1 mm-500 mm.

[0013] Preferably, the cross section of the wiring harness 1 is square or rectangular, and the cross section area is 2 mm 2 -400mm 2 .

[0014] Preferably, the magnetic line beam forming device 3 comprises: an extrusion mold 7 , wherein the extrusion mold 7 contains a molten magnetic conductive plastic fluid 18 .

[0015] The extrusion die 7 provides space for the molten magnetic plastic-coated wiring harness 1 and can adjust the amount of magnetic plastic coating according to the size of the wiring harness.

[0016] Preferably, the guide anti-return glue device 2 uses a positioning block 12 to wrap the wire harness 1 tightly, and the positioning block 12 is tightly connected to the extrusion die 7. Preventing the molten magnetic plastic from leaking from the edge of the extrusion die, the molten magnetic plastic will not be wasted, and will not affect the subsequent wire harness processing, achieving an anti-return glue effect. The positioning block is circular or polyhedral, and the material is a soft solid resin.

[0017] Preferably, the magnetic field magnetization device 4 comprises: a magnet box 13 and a magnetic conductor 14 ; or comprises: a magnet box 13 , a magnetic conductor 14 and a bracket 16 , wherein the bracket 16 is used to support the magnet box 13 .

[0018] Preferably, the magnetic field magnetization device 4 is closely connected with the magnetic line beam forming device 3; the magnetic line beam is subjected to magnetization treatment under a certain magnetic field strength and direction; the magnetic induction lines generated by the permanent magnets in the magnet box 13 transfer the magnetic properties to the magnetic end face 15 through the magnetic conductor 14. A suitable magnetic end face area will achieve the best effect on the magnetic field direction and magnetic induction strength of the magnetic line beam, and the aspect ratio of the magnetic end face is 0.5-10.

[0019] Preferably, the magnetic field magnetization device 4 includes three types: the first type is that the magnet box 13 is distributed on the left and right sides of the magnet conductor 14, and the bracket 16 supports the magnet box 13; the second type is that the magnet box 13 is distributed on the upper and lower sides of the magnet conductor 14, and the bracket 16 supports the magnet box 13 distributed on the lower side; the third type is that magnetic isolation resin 17 is added on both sides of the wiring harness 1. The magnetic force direction is stable and no leakage occurs.

[0020] Preferably, a cooling water mist device 9 is provided inside the cooling device 5, and a water receiver 10 is provided below the cooling device 5.

[0021] The cooling water mist device 9 cools down and solidifies the magnetic line bundle, and the water receiver 10 uses a water pump to pump water into the water tank of the cooling water mist device 9 for circulation.

[0022] Preferably, the positioning guide device 6 includes a positioning block 12 and a positioning guide ring 11, and the positioning block 12 is arranged in the middle of the positioning guide ring 11. The positioning guide device 6 uses the positioning block 12 to wrap the wire harness 1 tightly, and uses the positioning guide ring 11 to fix the positioning block 12, and at the same time guides the anti-return glue device 2, the extrusion die outlet 8, and the positioning guide device 6 to the same axis, so that the axial size error of the magnetic line harness is reduced.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] (1) The utility model is provided with a guide anti-glue return device 2, which tightly fits the wire harness 1 through the positioning block 12, and controls the guide anti-glue return device 2 to tightly connect the positioning block 12 with the magnetic wire harness forming device 3, so as to prevent the molten magnetic plastic from leaking during the coating process of the wire harness 1, thereby improving the utilization rate of the magnetic plastic and improving the coating property of the wire harness.

[0025] (2) The magnetic field magnetism extracting device 4 of the utility model with a special structure greatly improves the utilization rate of the permanent magnet;

[0026] (3) The utility model has a simple structure, is easy to operate, has a low cost, and has a significant effect. It is a device that does not cause leakage of molten magnetic conductive plastic, and ensures uniform magnetic field intensity and uniform magnetic conductive plastic coating of the wire harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the anti-return glue, magnetic stabilization and positioning guide device of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the magnetic field extraction device in Example 2 of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the magnetic field extraction device in Example 1 of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the magnetic field extraction device in Example 3 of the utility model;

[0032] The accompanying drawings are marked with: 1 is a wiring harness, 2 is a guiding anti-glue return device, 3 is a magnetic wire harness forming device, 4 is a magnetic field magnetism taking device, 5 is a cooling device, 6 is a positioning guiding device, 7 is an extrusion mold, 8 is an extrusion mold outlet, 9 is a cooling water mist device, 10 is a water receiver, 11 is a positioning guide ring, 12 is a positioning block, 13 is a magnet box, 14 is a magnetic conductor, 15 is a magnetic end face, 16 is a bracket, 17 is a magnetic insulation resin, and 18 is a molten magnetic conductive plastic fluid. DETAILED DESCRIPTION

[0033] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0034] Example 1

[0035] This embodiment relates to an integrated device for preventing glue return, magnetic stabilization and positioning guidance. Figure 1 As shown, it is composed of a wire harness 1, a guide anti-return glue device 2, a magnetic wire harness forming device 3, a magnetic field magnetism taking device 4, a cooling device 5, and a positioning guide device 6;

[0036] The wire harness 1 passes through the guiding anti-return glue device 2, the magnetic wire harness forming device 3, the magnetic field magnetism taking device 4, the cooling device 5, and the positioning guiding device 6 in sequence;

[0037] The wire harness 1 is a bare wire harness or a wire harness 1 that is packaged twice or multiple times.

[0038] The cross section of the wiring harness 1 is a square, and the area of ​​the cross section is 2 mm 2 .

[0039] The magnetic wire harness forming device 3 comprises: an extrusion die 7, in which a molten magnetic conductive plastic fluid 18 is contained; the extrusion die 7 provides a space for the molten magnetic conductive plastic to coat the wire harness 1, and can adjust the amount of magnetic conductive plastic coating according to the size of the wire harness.

[0040] The guide anti-return glue device 2 uses the positioning block 12 to wrap the wire harness 1 tightly, and the positioning block 12 is tightly connected to the extrusion die 7. It prevents the molten magnetic plastic from leaking from the edge of the extrusion die, and the molten magnetic plastic will not be wasted, nor will it affect the subsequent wire harness processing, achieving the anti-return glue effect. The positioning block is circular or polyhedral, and the material is soft solid resin.

[0041] The magnetic field magnetization device 4 comprises: a magnet box 13, a magnet conductor 14, and a bracket 16, wherein the bracket 16 is used to support the magnet box 13, specifically, the magnet box 13 is distributed on the upper and lower sides of the magnet conductor 14, and the bracket 16 supports the magnet box 13 distributed on the lower side. Figure 3 shown.

[0042] The magnetic field magnetization device 4 is closely connected with the magnetic line beam forming device 3; the magnetic line beam is subjected to magnetization treatment under a certain magnetic field strength and direction; the magnetic induction lines generated by the permanent magnets in the magnet box 13 transfer the magnetic properties to the magnetic end face 15 through the magnetic conductor 14. A suitable magnetic end face area will make the magnetic field direction and magnetic induction intensity of the magnetic line beam have the best effect, and the aspect ratio of the magnetic end face is 0.5.

[0043] A cooling water mist device 9 is disposed inside the cooling device 5 , and a water receiver 10 is disposed below the cooling device 5 .

[0044] The cooling water mist device 9 cools down and solidifies the magnetic line bundle, and the water receiver 10 uses a water pump to pump water into the water tank of the cooling water mist device 9 for circulation.

[0045] The positioning guide device 6 includes a positioning block 12 and a positioning guide ring 11, and the positioning block 12 is arranged in the middle of the positioning guide ring 11. The positioning guide device 6 uses the positioning block 12 to wrap the wire harness 1 tightly, and uses the positioning guide ring 11 to fix the positioning block 12, and at the same time guides the anti-return glue device 2, the extrusion die outlet position 8, and the positioning guide device 6 to the same axis, so that the axial size error of the magnetic wire harness is reduced.

[0046] Example 2

[0047] This embodiment relates to an integrated device for preventing glue return, magnetic stabilization and positioning guidance. Figure 1As shown, it is composed of a wire harness 1, a guide anti-return glue device 2, a magnetic wire harness forming device 3, a magnetic field magnetism device 4, a cooling device 5, and a positioning guide device 6; the wire harness 1 passes through the guide anti-return glue device 2, the magnetic wire harness forming device 3, the magnetic field magnetism device 4, the cooling device 5, and the positioning guide device 6 in sequence; the wire harness 1 is a bare wire harness;

[0048] The cross section of the wire harness 1 is circular, and the diameter is 500 mm.

[0049] Preferably, the magnetic line beam forming device 3 comprises: an extrusion mold 7 , wherein the extrusion mold 7 contains a molten magnetic conductive plastic fluid 18 .

[0050] The extrusion die 7 provides space for the molten magnetic plastic-coated wiring harness 1 and can adjust the amount of magnetic plastic coating according to the size of the wiring harness.

[0051] The guide anti-return glue device 2 uses the positioning block 12 to wrap the wire harness 1 tightly, and the positioning block 12 is tightly connected to the extrusion die 7. It prevents the molten magnetic plastic from leaking from the edge of the extrusion die, and the molten magnetic plastic will not be wasted, nor will it affect the subsequent wire harness processing, achieving the anti-return glue effect. The positioning block is circular or polyhedral, and the material is soft solid resin.

[0052] The magnetic field magnetization device 4 comprises: a magnet box 13, a magnet conductor 14, and a bracket 16, wherein the bracket 16 is used to support the magnet box 13, specifically, the magnet box 13 is distributed on the left and right sides of the magnet conductor 14, and the bracket 16 supports the magnet box 13; Figure 2 shown.

[0053] The magnetic field magnetization device 4 is closely connected with the magnetic line beam forming device 3; the magnetic line beam is subjected to magnetization treatment under a certain magnetic field strength and direction; the magnetic induction lines generated by the permanent magnets in the magnet box 13 transfer the magnetic properties to the magnetic end face 15 through the magnetic conductor 14. The appropriate magnetic end face area will make the magnetic field direction and magnetic induction intensity of the magnetic line beam have the best effect, and the aspect ratio of the magnetic end face is 10.

[0054] A cooling water mist device 9 is disposed inside the cooling device 5 , and a water receiver 10 is disposed below the cooling device 5 .

[0055] The cooling water mist device 9 cools down and solidifies the magnetic line bundle, and the water receiver 10 uses a water pump to pump water into the water tank of the cooling water mist device 9 for circulation.

[0056] The positioning guide device 6 includes a positioning block 12 and a positioning guide ring 11, and the positioning block 12 is arranged in the middle of the positioning guide ring 11. The positioning guide device 6 uses the positioning block 12 to wrap the wire harness 1 tightly, and uses the positioning guide ring 11 to fix the positioning block 12, and at the same time guides the anti-return glue device 2, the extrusion die outlet position 8, and the positioning guide device 6 to the same axis, so that the axial size error of the magnetic wire harness is reduced.

[0057] Example 3

[0058] This embodiment relates to an integrated device for preventing glue return, magnetic stabilization and positioning guidance. Figure 1 As shown, it is composed of a wire harness 1, a guide anti-return glue device 2, a magnetic wire harness forming device 3, a magnetic field magnetism taking device 4, a cooling device 5, and a positioning guide device 6;

[0059] The wire harness 1 passes through the guiding anti-return glue device 2, the magnetic wire harness forming device 3, the magnetic field magnetism taking device 4, the cooling device 5, and the positioning guiding device 6 in sequence;

[0060] The wire harness 1 is a bare wire harness or a wire harness 1 that is packaged twice or multiple times.

[0061] The cross section of the wiring harness 1 is rectangular, and the cross section area is 400mm 2 .

[0062] The magnetic line beam forming device 3 comprises an extrusion die 7 , in which a molten magnetic conductive plastic fluid 18 is contained.

[0063] The extrusion die 7 provides space for the molten magnetic plastic-coated wiring harness 1 and can adjust the amount of magnetic plastic coating according to the size of the wiring harness.

[0064] The guide anti-return glue device 2 uses the positioning block 12 to wrap the wire harness 1 tightly, and the positioning block 12 is tightly connected to the extrusion die 7. It prevents the molten magnetic plastic from leaking from the edge of the extrusion die, and the molten magnetic plastic will not be wasted, nor will it affect the subsequent wire harness processing, achieving the anti-return glue effect. The positioning block is circular or polyhedral, and the material is soft solid resin.

[0065] The magnetic field magnetism collecting device 4 comprises: a magnet box 13, a magnetic conductor 14; specifically, magnetic isolation resin 17 is added on both sides of the wiring harness 1, Figure 4 As shown, the magnetic force direction is stabilized and magnetic leakage will not occur.

[0066] The magnetic field magnetization device 4 is closely connected with the magnetic line beam forming device 3; the magnetic line beam is subjected to magnetization treatment under a certain magnetic field strength and direction; the magnetic induction lines generated by the permanent magnets in the magnet box 13 transfer the magnetic properties to the magnetic end face 15 through the magnetic conductor 14. The appropriate magnetic end face area will make the magnetic field direction and magnetic induction intensity of the magnetic line beam have the best effect, and the aspect ratio of the magnetic end face is 10.

[0067] A cooling water mist device 9 is disposed inside the cooling device 5 , and a water receiver 10 is disposed below the cooling device 5 .

[0068] The cooling water mist device 9 cools down and solidifies the magnetic line bundle, and the water receiver 10 uses a water pump to pump water into the water tank of the cooling water mist device 9 for circulation.

[0069] The positioning guide device 6 includes a positioning block 12 and a positioning guide ring 11, and the positioning block 12 is arranged in the middle of the positioning guide ring 11. The positioning guide device 6 uses the positioning block 12 to wrap the wire harness 1 tightly, and uses the positioning guide ring 11 to fix the positioning block 12, and at the same time guides the anti-return glue device 2, the extrusion die outlet position 8, and the positioning guide device 6 to the same axis, so that the axial size error of the magnetic wire harness is reduced.

[0070] The working principle of the utility model is as follows: the wire harness 1 first enters the guiding anti-glue return device 2, and the positioning block 12 is used to wrap the wire harness 1 tightly to achieve friction positioning, and the positioning block 12 and the extrusion mold 7 are closely matched by friction, so that the extrusion mold 7 will not leak material, and the guiding positioning and anti-glue return effect is achieved; the extrusion mold 7 is close to the guiding anti-glue return device 2, providing space for the magnetic plastic to cover the wire harness 1, and the temperature of the extrusion mold 7 is determined according to the performance of the magnetic plastic used. The wire harness 1 passes through the extrusion die outlet 8 and enters the magnetic field magnetizing device 4. The magnetic field magnetizing device 4 and the extrusion die 7 are connected by bolts. The magnetic field source of the magnetic field magnetizing device is provided by the permanent magnet 7. A rectangular magnet with an aspect ratio of 0.2-4 is selected. The magnetic field strength generated by the permanent magnet 13 is 3000-15000 Gauss. The magnetizer 14 transfers the magnetic properties of the permanent magnet to the magnet end face 15 of the magnetizer. The aspect ratio of the magnetic end face 15 is 0.5-10. The magnetizer 14 is a high magnetic permeability material, which causes the magnetic particles in the magnetic line beam to be arranged in a directional manner to generate a stable magnetic field. The magnetic line beam obtains a magnetic field strength of 1000-12000 Gauss. The cooling device 5 is between the magnetic field magnetizing device 4 and the positioning guide device 6, so that the magnetic line bundle is cooled, shrunk and solidified. The cooling device 5 uses the water mist device 9 to cool the magnetic line bundle 360 ​​degrees. A water receiver 10 is arranged below the wire harness 1, and the water enters the cooling water tank through the water pump circulation, guiding the anti-return glue device 2, the extrusion mold outlet position 8, and the positioning guide device 6 to be on the same axis. The positioning guide device 6 uses the positioning block 12 to tighten the magnetic line bundle, and uses the positioning guide ring 11 to fix the positioning block 12, so that the magnetic line bundle will not slide randomly, and the axial size error is less than 2%.

[0071] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. An integrated device for preventing glue return, magnetic stabilization and positioning guidance, characterized in that: It is composed of a wire harness (1), a guiding anti-return glue device (2), a magnetic wire harness forming device (3), a magnetic field magnetism taking device (4), a cooling device (5), and a positioning guiding device (6); The wire harness (1) sequentially passes through a guiding anti-return glue device (2), a magnetic wire harness forming device (3), a magnetic field magnetism taking device (4), a cooling device (5), and a positioning guiding device (6); The wire harness (1) is a bare wire harness or a wire harness (1) that has been packaged twice or multiple times.

2. The anti-glue return, magnetic stabilization and positioning guide integrated device according to claim 1, characterized in that: The cross section of the wire harness (1) is circular, and the diameter is 1 mm-500 mm.

3. The anti-return, magnetic stabilization and positioning guide integrated device according to claim 1, characterized in that: The cross section of the wire harness (1) is square or rectangular, and the cross section area is 2 mm 2 -400mm 2 .

4. The integrated device for preventing glue return, magnetic stabilization and positioning guidance according to claim 1, characterized in that: The magnetic line of force beam forming device (3) comprises an extrusion die (7) in which molten magnetic conductive plastic fluid (18) is contained.

5. The anti-return, magnetic stabilization and positioning guide integrated device according to claim 4, characterized in that: The guiding anti-glue return device (2) uses a positioning block (12) to tightly wrap the wire harness (1), and the positioning block (12) is tightly connected to the extrusion die (7).

6. The anti-return, magnetic stabilization and positioning guide integrated device according to claim 1, characterized in that: The magnetic field magnetism extraction device (4) comprises: a magnet box (13) and a magnetic conductor (14); or comprises: a magnet box (13), a magnetic conductor (14) and a bracket (16), wherein the bracket (16) is used to support the magnet box (13).

7. The integrated device for preventing glue return, magnetic stabilization and positioning guidance according to claim 6, characterized in that: The magnetic field magnetism taking device (4) is tightly connected to the magnetic force line beam forming device (3); the magnetic induction lines generated by the permanent magnets in the magnet box (13) transfer the magnetic properties to the magnetic end surface (15) through the magnetic conductor (14).

8. The integrated device for preventing glue return, magnetic stabilization and positioning guidance according to claim 1, characterized in that: The magnetic field magnetization device (4) includes three types: the first type is that the magnet boxes (13) are distributed on the left and right sides of the magnet conductor (14), and the bracket (16) supports the magnet boxes (13); the second type is that the magnet boxes (13) are distributed on the upper and lower sides of the magnet conductor (14), and the bracket (16) supports the magnet boxes (13) distributed on the lower side; the third type is that magnetic isolation resin (17) is added on both sides of the wiring harness (1).

9. The integrated device for preventing glue return, stabilizing magnetic field and positioning and guiding as claimed in claim 1, characterized in that: A cooling water mist device (9) is arranged inside the cooling device (5), and a water receiver (10) is arranged below the cooling device (5).

10. The anti-return, magnetic stabilization and positioning guide integrated device according to claim 1, characterized in that: The positioning guide device (6) comprises a positioning block (12) and a positioning guide ring (11), wherein the positioning block (12) is arranged at a middle position of the positioning guide ring (11).

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