CN108767803B - Reinforcing apparatus for avoiding damage of cable intermediate joint - Google Patents
Reinforcing apparatus for avoiding damage of cable intermediate joint Download PDFInfo
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- CN108767803B CN108767803B CN201810830622.5A CN201810830622A CN108767803B CN 108767803 B CN108767803 B CN 108767803B CN 201810830622 A CN201810830622 A CN 201810830622A CN 108767803 B CN108767803 B CN 108767803B
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- cylinder
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 18
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- 230000007704 transition Effects 0.000 claims description 18
- 210000001503 joint Anatomy 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 5
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
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- 238000010521 absorption reaction Methods 0.000 claims 1
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- 230000007797 corrosion Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
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- 238000005457 optimization Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
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- 238000009435 building construction Methods 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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- 238000005242 forging Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Cable Accessories (AREA)
Abstract
The reinforcing device for preventing the cable intermediate joint from being damaged comprises a first half cylinder and a second half cylinder which are matched, wherein a cavity for accommodating the cable joint is formed after the first half cylinder and the second half cylinder are matched; is characterized in that: two flanges are arranged on the first half cylinder and the second half cylinder, bolt holes are arranged on the flanges at intervals, and a first fastening cavity, a second fastening cavity and a third fastening cavity are sequentially arranged from the middle part to two sides of the accommodating cavity; waterproof sealing layers are arranged between the outer wall of the three-phase cable joint to be reinforced and the inner walls of the first fastening cavity, the second fastening cavity and the third fastening cavity, and sealing glue is filled between the two flanges which are in contact. The cable joint reinforcing device provided by the invention realizes the fastening and sealing of the cable joint part, and effectively enhances the bending resistance, tensile strength and rigidity of the cable joint part, so that the phenomena of heating, electric leakage and electric discharge of the cable joint part can be avoided, the service life of the cable joint part is prolonged, and the cable joint reinforcing device has remarkable beneficial effects and is suitable for application and popularization.
Description
Technical Field
The invention relates to a cable joint reinforcing device, in particular to a reinforcing device capable of effectively avoiding damage to a middle joint of a cable.
Background
With the development of social economy, the production electricity and the life electricity are greatly increased, and the high-voltage power transmission is widely applied in various fields because of the unique advantages. Due to the reasons of factory length limitation, building construction excavation loss, theft cutting loss and the like, two broken high-voltage cables are often required to be connected, and an intermediate joint is formed between the two connected cables. According to the working environment and construction habit, various mature joint modes are formed. However, these joints have the characteristics of insufficient strength and rigidity and insufficient earthquake resistance, are easily damaged under the action of external impact load, vibration load or drag force, and thus are subjected to discharge phenomenon, and cause abnormal heating, so that the cable intermediate joint is easily and frequently damaged repeatedly to cause safety accidents, and no technology for avoiding accidents from the viewpoint of mechanical reinforcement exists at present.
In summary, the problems of the prior art are: the strength, rigidity and earthquake resistance of the cable intermediate joint are insufficient. The technical problem is solved in the research content of the interdiscipline, so that the delay is not solved, and the line can be paved again only after an accident occurs, or the operation is stopped when the temperature rise is detected to be too large.
Disclosure of Invention
In order to overcome the defects of the technical problems, the invention provides a reinforcing device for preventing the middle joint of the cable from being damaged.
The reinforcing device for preventing the cable middle joint from being damaged comprises a first semi-cylinder and a second semi-cylinder which are matched, wherein the first semi-cylinder and the second semi-cylinder are matched to form a containing cavity for containing the cable joint part; the method is characterized in that: two flanges are arranged on the first half cylinder and the second half cylinder, bolt holes are formed in the flanges at intervals, and the first half cylinder and the second half cylinder are fixed through bolts penetrating through the bolt holes; the middle part of the accommodating cavity to two sides sequentially comprises a first fastening cavity for accommodating a cable connection copper pipe part, a second fastening cavity for accommodating a bare cable part and a third fastening cavity for accommodating a complete cable part, and the inner diameters of the second fastening cavity, the third fastening cavity and the third fastening cavity are gradually increased; waterproof sealing layers are arranged between the outer wall of the three-phase cable joint to be reinforced and the inner walls of the first fastening cavity, the second fastening cavity and the third fastening cavity, and sealing glue is filled between the two flanges which are in contact.
According to the reinforcing device for preventing the cable intermediate joint from being damaged, the first conical transition cavity is arranged between the first fastening cavity and the second fastening cavity, the second conical transition cavity is arranged between the second fastening cavity and the third fastening cavity, and the elastic filler layer is arranged between the outer wall of the three-phase cable joint to be reinforced and the inner walls of the first conical transition cavity and the second conical transition cavity.
According to the reinforcing device for preventing the cable middle joint from being damaged, the outer side of the third fastening cavity is provided with the end protection cavity, and the end protection cavity is a conical cavity with an outward expansion angle of not less than 10 degrees.
According to the reinforcing device for preventing the cable intermediate joint from being damaged, the flanges on the first half cylinder and the second half cylinder are provided with the plurality of rib plates at intervals.
The reinforcing device for preventing the cable middle joint from being damaged comprises a rubber sleeve sleeved on the periphery of the first semicircular cylinder and the second semicircular cylinder, so that the reinforcing device is isolated from the periphery in a damping manner.
According to the reinforcing device for preventing the cable intermediate joint from being damaged, the first half cylinder (1) and the second half cylinder (2) are made of cast iron, cast aluminum or rigid high polymer materials, the waterproof sealing layer (12) is made of waterproof glue or waterproof adhesive tapes, and the elastic filler layer (13) is made of a foam cushion.
According to the reinforcing device for preventing the cable intermediate joint from being damaged, the outer surfaces of the first half cylinder (1) and the second half cylinder (2) are coated with a corrosion-resistant material layer.
The beneficial effects of the invention are as follows: the cable joint reinforcing device consists of a first semicircular cylinder and a second semicircular cylinder, wherein a containing cavity for fastening and sealing a cable middle joint is formed between the first semicircular cylinder and the second semicircular cylinder, and the containing cavity is designed into a second fastening cavity, a third fastening cavity and a first fastening cavity with gradually increased diameter sizes, so that the containing and fastening of a bare cable part, a complete cable part and a cable connection copper pipe part are respectively realized; by arranging a waterproof sealing layer between the cable and the second, third and first fastening cavities and arranging sealant between the flanges which are in contact, the sealing of the cable joint part is ensured; the cable joint reinforcing device provided by the invention realizes the fastening and sealing of the cable joint part, and effectively enhances the bending resistance, tensile strength and rigidity of the cable joint part, so that the phenomena of heating, electric leakage and electric discharge of the cable joint part can be avoided, the service life of the cable joint part is prolonged, and the cable joint reinforcing device has remarkable beneficial effects and is suitable for application and popularization.
Drawings
FIG. 1 is a front view of a reinforcing apparatus according to embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a reinforcing apparatus according to embodiment 1 of the present invention;
FIG. 3 is a schematic view showing the structure of the first or second half cylinder according to embodiment 1 of the present invention;
FIG. 4 is a view showing the state of use of the reinforcing apparatus according to embodiment 1 of the present invention;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is an enlarged view of a portion of area A of FIG. 4;
fig. 7 is a front view of a reinforcing apparatus of embodiment 2 of the present invention;
FIG. 8 is a schematic cross-sectional view of a reinforcing apparatus according to embodiment 2 of the present invention;
fig. 9 is a schematic structural view of a rubber sleeve according to the present invention.
In the figure: 1 first half cylinder, 2 second half cylinder, 3 flange, 4 bolt hole, 5 floor, 6 first fastening chamber, 7 second fastening chamber, 8 third fastening chamber, 9 first toper transition chamber, 10 second toper transition chamber, 11 tip protection chamber, 12 waterproof sealing layer, 13 elastic filler layer, 14 triphase cable joint, 15 triangle-shaped cavity, 16 circular cavity, 17 rubber sleeve, 18 inner chamber.
Description of the embodiments
The invention will be further described with reference to the drawings and examples.
Embodiment 1, as shown in fig. 1 and 2, respectively, gives a front view of the reinforcing apparatus of embodiment 1 of the present invention, as shown in fig. 3, which gives a schematic view of the structure of the first or second semi-cylinder of embodiment 1 of the present invention, fig. 4, which gives a state of use of the reinforcing apparatus of embodiment 1 of the present invention, and fig. 5, which gives a left view of fig. 4; the reinforcing device of the 1 st embodiment is composed of a first half cylinder 1 and a second half cylinder 2, two flanges 3 are arranged on the first half cylinder 1 and the second half cylinder 2, the first half cylinder and the second half cylinder (1 and 2) are combined together in a mode that the flanges 3 are contacted, a containing cavity for containing the three-phase cable joint 14 is formed inside the combined first half cylinder and the combined second half cylinder, and the cross section of the containing cavity is triangular. For two sections of connected cables, the middle part of the connecting part is a copper pipe for cable connection with larger diameter, and the copper pipe realizes the connection of cable core wires; the two sides of the copper pipe are three bare cable parts with smaller diameter sizes, and the outer sides of the bare cables are complete cable parts with centered diameter sizes. Therefore, in order to realize the cooperation with the joint position, the middle part of the accommodating cavity is provided with a first fastening cavity 6, two sides of the first fastening cavity 6 are provided with a second fastening cavity 7, the outer side of the second fastening cavity 7 is provided with a third fastening cavity 8, and the diameter sizes of the first, third and second fastening cavities are gradually reduced so as to respectively accommodate and fasten the copper pipe, the bare cable and the complete cable position for cable connection.
The flanges 3 of the first half cylinder 1 and the second half cylinder 2 are provided with a plurality of bolt holes 4 at intervals, and after the three-phase cable joint 14 to be reinforced is clamped by the first half cylinder 1 and the second half cylinder 2, the three-phase cable joint is fastened together through bolts passing through the bolt holes 4 on the flanges 3. In order to realize the sealing effect on the reinforced cable structure part, not only is the joint surface of the upper flanges 3 of the first and second semi-cylinders (1 and 2) coated with sealant, but also waterproof sealing layers 12 are arranged between the outer wall of the three-phase cable joint 14 and the inner walls of the first fastening cavity 6, the second fastening cavity 7 and the third fastening cavity 8, so that the three-phase cable joint 14 part is completely sealed. Therefore, the first semi-cylinder (1) and the second semi-cylinder (2) not only ensure the bending resistance, the tensile strength and the rigidity of the cable connection part, but also ensure the sealing performance of the cable connection part, so that the damage, the excessive bending, the electric leakage and the electric discharge of the cable connector can be effectively avoided, the service life of the cable connector is prolonged, and the electric accident is reduced.
Because the diameter sizes of the first fastening cavity (6), the second fastening cavity (7) and the third fastening cavity (8) are unequal, a first conical transition cavity (9) is arranged between the first fastening cavity (6) and the second fastening cavity (7) for realizing transition, a second conical transition cavity (10) is arranged between the second fastening cavity (7) and the third fastening cavity (8), and an elastic filler layer (13) is arranged between the outer wall of the three-phase cable joint (14) and the first conical transition cavity (9) and the second conical transition cavity (10) for enhancing the anti-seismic performance of the three-phase cable joint (14). The elastic filler layer 13 can be made of foam cushion material, the first half cylinder 1 and the second half cylinder 2 can be made of cast iron, cast aluminum or rigid polymer material, and the waterproof sealing layer 12 is made of waterproof glue or waterproof glue.
After the rib plates 5 are arranged on the first half cylinder 1 and the second half cylinder 2, not only can the firm connection between the rib plates 5 and the first half cylinder or the second half cylinder (1 and 2) be enhanced, but also the stretching resistance, the torsional strength and the rigidity of the first half cylinder and the second half cylinder (1 and 2) can be enhanced, and the protection of the three-phase cable connector 14 is more facilitated.
If the cable is transmitted on the ground, the cable is inevitably swung by a certain amplitude, so that the cable parts at the two ends and the end parts of the first half cylinder 1 and the second half cylinder 2 are extremely easy to bend relatively, and the cable parts at the two ends are easy to wear or damage; in order to avoid such a situation, the outside of the third fastening chamber 8 is shown as a conical chamber with an expansion angle of not less than 10 °, as shown in fig. 6, giving a partial enlarged view of the area a in fig. 4, so that even if the cable at both ends of the three-phase cable joint 14 has a certain deflection, the ends of the first half cylinder 1 and the second half cylinder 2 will not damage the cable. In order to make the reinforcement work in a corrosive environment, the outer surface thereof may be coated with a layer of a corrosion-resistant material, such as a water-repellent paint or a corrosion-resistant metal film.
The using method of the reinforcing device of the embodiment comprises the following steps: firstly, connecting two sections of cables, winding the outer surface of a copper pipe part by using an insulating tape, coating waterproof sealant on the part of the outer surface of a three-phase cable joint 14 matched with the first, second and third fastening cavities, and arranging an elastic filler layer 13 with proper thickness on the part matched with the first and second conical transition cavities; then, the first half cylinder 1 and the second half cylinder 2 are buckled on the periphery of the three-phase cable joint 14, and finally the first half cylinder 1 and the second half cylinder 2 are fastened together by bolts penetrating through the bolt holes 4, so that the reinforcement of the cable intermediate joint position is realized.
Embodiment 2, as shown in fig. 7 and 8, provides a front view and a schematic cross-sectional view of the reinforcing apparatus according to embodiment 2 of the present invention, respectively, the structure of this embodiment is simpler than that of embodiment 1, the cross-section of the receiving cavity is circular, the receiving cavity is composed of a cavity in the middle of the fixing joint and a cavity in the fixing outer end, and a tapered transition cavity is provided therebetween, and the reinforcing apparatus of this form is suitable for reinforcing the three-phase cable joint 14 after the joint is wrapped. The outermost end of the accommodating cavity is also provided with a circular cavity end protection cavity with a taper expanding outwards so as to realize the protection of the cable. The outer wall of the illustrated three-phase cable joint 14 is filled with an elastic filler layer 13 between the outer wall of the first half cylinder 1 and the inner wall of the second half cylinder 2.
As shown in fig. 9, a schematic structural diagram of the rubber sleeve according to the present invention is shown, wherein the center of the rubber sleeve 17 is an inner cavity 18 for accommodating the first half cylinder 1 and the second half cylinder 2, and the rubber sleeve 17 is applied to the occasion of frequent impact. The cross section of the rubber sleeve 17 should be similar to the cross section of the first half cylinder 1 and the second half cylinder 2, and can also be a simple circle shape, and the rubber sleeve is sleeved. For the exposed cable or the middle joint, the large damping elastic material such as the rubber pad, the gunny bag sheet and the like can be only added on the contact.
As a further improvement of the invention, the reinforcing device can be used for reinforcing the middle joint of the optical cable after the size is reduced, so that the correct transmission of data is ensured.
As a further improvement of the invention, the first and second semi-cylinders (1, 2) can be made of advanced materials with enough strength, rigidity and shock resistance.
As a further improvement of the invention, the first half cylinder (1) and the second half cylinder (2) can be structurally improved according to the blank manufacturing mode, such as optimization of transition fillets, draft angles and the like of castings, optimization of sizes of machined surfaces and non-machined surfaces of forgings and optimization of shapes and connecting modes of injection molding pieces.
As a further development of the invention, the dimensions of the first and second semi-cylinders (1, 2) and the first, second and third fastening cavities (6, 7, 8) inside them can be adapted appropriately according to the continued advancement of the cable connection technology. The device allows for a low strength connection, and some cable connection methods with small breaking amounts can greatly reduce the size of the device.
As a further improvement of the invention, the first and second semi-cylinders (1, 2) can be opened without sealing, so as to reduce weight; the bore shape may also conform to the shape of the cable.
As a further development of the invention, the 10 degree conical bore of the end protection cavity can be optimized according to the rigidity, size of the connected cable.
As a further development of the invention, the bolt groups can be replaced by other more efficient and reliable means of attachment.
As a further improvement of the invention, the elastic filling material, the high damping elastic material and the sealing material can be replaced with the invention and the discovery of new materials.
The invention has the advantages and positive effects that:
1) Simple structure, easy processing and convenient assembly. The materials, the structure and the processing method of the device are common, commonly used and reliable.
2) Has waterproof and dampproof functions. The cable is inevitably contacted with rain and snow or water seepage underground, and a waterproof function is necessary.
3) The structure is firm and the rigidity is strong. The cable middle joint is prevented from being damaged due to insufficient strength or rigidity by adopting cast iron, cast aluminum or high-rigidity high polymer materials and adopting the locking bolt group for connection, so that the power accidents are reduced by more than 50%.
4) The cable protection device has the function of protecting the cable, thereby having long service life. The 10-degree protection taper hole can effectively protect the exposed parts of the cables at two ends from being damaged when the cables are frequently dragged, carried and bent.
5) Has certain shock resistance. The cable middle joint is used for working occasions with serious vibration loads such as tunneling, mountain opening and mining, and accidents caused by the damage of the cable middle joint can be avoided.
6) Has certain corrosion resistance. In a corrosive environment, the device will not fail quickly.
7) The invention can be effectively implemented to completely stop accidents caused by the damage of the middle joint of the cable. As long as the two sections of cables are effectively connected before the device is assembled, the spark discharge phenomenon is avoided, and the spark discharge phenomenon cannot occur after the device is installed. The tensile strength of the existing cable intermediate joint is required to reach more than 60% of that of a complete cable, the bending strength and rigidity of the cable intermediate joint are guaranteed, the cable intermediate joint can bear impact and extrusion force, and the damping material and the structure enable the cable intermediate joint not to fail under the action of vibration load, so that the cable intermediate joint can work normally if the cable intermediate joint is not broken and disassembled intentionally.
8) The effective implementation of the invention can lead the original exquisite and effective cable connection mode to be popularized and applied, such as connection modes that various connection surfaces are perfectly connected and the strength is difficult to be ensured, connection modes that various breaking and dismantling amounts are small and the strength is difficult to be restored, and low-strength connection modes such as various welding and bonding.
The above description is merely illustrative of the present invention and is not intended to limit the invention, but any modifications, equivalents, and improvements made within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (5)
1. A reinforcing device for preventing a cable middle joint from being damaged comprises a first semi-cylinder (1) and a second semi-cylinder (2) which are matched, wherein the first semi-cylinder and the second semi-cylinder are matched to form a containing cavity for containing the cable joint part; the method is characterized in that: two flanges (3) are arranged on the first half cylinder and the second half cylinder, bolt holes (4) are formed in the flanges at intervals, and the first half cylinder and the second half cylinder are fixed through bolts penetrating through the bolt holes; the middle part of the accommodating cavity to two sides sequentially comprises a first fastening cavity (6) for accommodating a cable connection copper pipe part, a second fastening cavity (7) for accommodating a bare cable part and a third fastening cavity (8) for accommodating a complete cable part, and the inner diameters of the second fastening cavity, the third fastening cavity and the first fastening cavity are gradually increased; waterproof sealing layers (12) are arranged between the outer wall of the three-phase cable joint (14) to be reinforced and the inner walls of the first, second and third fastening cavities, and sealant is filled between the two flanges which are contacted with each other;
the device comprises rubber sleeves (17) which are sleeved on the peripheries of the first half cylinder (1) and the second half cylinder (2) so as to realize shock absorption isolation between the reinforcing device and the periphery;
a plurality of rib plates (5) are distributed on the flanges (3) on the first half cylinder (1) and the second half cylinder (2) at intervals.
2. The reinforcement means for avoiding damage to the intermediate joint of a cable according to claim 1, wherein: a first conical transition cavity (9) is arranged between the first fastening cavity (6) and the second fastening cavity (7), a second conical transition cavity (10) is arranged between the second fastening cavity and the third fastening cavity (8), and an elastic filler layer (13) is arranged between the outer wall of the three-phase cable joint (14) to be reinforced and the inner walls of the first conical transition cavity and the second conical transition cavity.
3. Reinforcing apparatus for avoiding damage to intermediate joints of cables according to claim 1 or 2, characterized in that: an end protection cavity (11) is arranged on the outer side of the third fastening cavity (8), and the end protection cavity is a conical cavity with an outward expansion angle of not less than 10 degrees.
4. The reinforcing apparatus for preventing cable intermediate knot damage according to claim 2, wherein: the first half cylinder (1) and the second half cylinder (2) are made of cast iron, cast aluminum or rigid high polymer materials, the waterproof sealing layer (12) is made of waterproof glue or waterproof adhesive tape, and the elastic filler layer (13) is made of a foam cushion.
5. Reinforcing apparatus for avoiding damage to intermediate joints of cables according to claim 1 or 2, characterized in that: the outer surfaces of the first half cylinder (1) and the second half cylinder (2) are coated with a layer of anti-corrosion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810830622.5A CN108767803B (en) | 2018-07-26 | 2018-07-26 | Reinforcing apparatus for avoiding damage of cable intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810830622.5A CN108767803B (en) | 2018-07-26 | 2018-07-26 | Reinforcing apparatus for avoiding damage of cable intermediate joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108767803A CN108767803A (en) | 2018-11-06 |
| CN108767803B true CN108767803B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810830622.5A Active CN108767803B (en) | 2018-07-26 | 2018-07-26 | Reinforcing apparatus for avoiding damage of cable intermediate joint |
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| Country | Link |
|---|---|
| CN (1) | CN108767803B (en) |
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