Intelligent 10kV medium-voltage coal mining machine variable frequency cable

Abstract

The invention discloses an intelligent 10kV medium-voltage coal mining machine variable-frequency cable, and relates to the technical field of cables. The cable comprises an outer protection layer assembly, a plurality of groups of wire cores used for transmitting electric energy are assembled in the outer protection layer assembly, and force unloading assemblies are assembled on the outer walls of the plurality of groups of wire cores at equal intervals; the outer wall of the force unloading assembly is coated with an inner protection layer connected with the inner wall of the outer protection layer assembly. According to the invention, the elastic fastener in the cable is used for coping with the pressure on the wire core when the cable is bent, the deformation of the elastic fastener is used for counteracting and decomposing, the wire core can be protected from being extruded and damaged, and meanwhile, a reverse recovery force is generated on the bent wire part, so that the bent wrap angle of the wire is relatively large, and the wire core is prevented from being damaged. The electric barrier can be prevented from being blocked by foreign objects when pulled, and the S-shaped ring sleeve close to the outer layer is matched with the PVC protective sleeve, so that the tensile strength of the cable can be improved, and the outer protective sleeve is not easy to crack or break.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to an intelligent 10kV medium-voltage coal mining machine frequency conversion cable. Background Art

[0002] Coal shearers are one of the key components of fully mechanized mining equipment. They evolved from coal cutters and are crucial for the mechanization and modernization of coal mine production. They generally consist of a cutting unit, a loading unit, a traveling unit (traction unit), an electric motor, an operating control system, and auxiliary devices. Mechanized coal mining can reduce physical labor, improve safety, and achieve high production, high efficiency, and low energy consumption. However, coal shearers require a significant amount of electricity during operation, which must be transmitted via cables. Therefore, an intelligent 10kV medium-voltage reinforced coal shearer cable is required.

[0003] The position of the coal mining machine will change during operation, and it will drag the power cable connected to it and move synchronously. Since the cable itself has a certain flexibility, the cable will be partially coiled, and the coils will generate additional squeezing pressure on the multiple groups of wire cores inside the cable. As the number of times increases, the cable will be damaged. In addition, when the cable is pulled and moved, a lateral pulling force will appear. Combined with the friction between the cable and the ground and the weight of the cable itself, the cable will be partially stretched laterally, and even the outer protective layer will crack or break, thereby losing the protection effect of the wire core inside the cable. For this reason, an intelligent 10kV medium-voltage coal mining machine variable frequency cable is proposed. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an intelligent 10kV medium voltage coal mining machine frequency conversion cable to solve the technical problem raised in the above background that the internal wire core is damaged due to bending when the cable is pulled.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an intelligent 10kV medium-voltage coal mining machine frequency conversion cable, comprising an outer protective layer assembly, wherein the outer protective layer assembly is equipped with multiple groups of electric wire cores for transmitting electric energy, and the outer walls of the multiple groups of electric wire cores are evenly spaced and equipped with force unloading assemblies, and the outer walls of the force unloading assemblies are covered with an inner protective layer connected to the inner wall of the outer protective layer assembly;

[0006] The force unloading assembly includes a polygonal elastic frame installed on the outside of multiple groups of electric wire cores, the inner wall of the polygonal elastic frame is equipped with multiple groups of T-shaped seats, the center position of the polygonal elastic frame is located between the multiple groups of electric wire cores and a constraint ring is provided, the inner center position of the constraint ring is equipped with an inner lining elastic part, each group of the T-shaped seats is provided with a movable rod extending into the constraint ring and contacting the inner lining elastic part, a positioning channel is reserved in the T-shaped seat at the contact position with the movable rod, a fan-shaped notch connected to the positioning channel is provided on the side of the T-shaped seat that fits the inner wall of the polygonal elastic frame, and an elastic fastener in contact with the end of the movable rod is equipped in the fan-shaped notch.

[0007] As an optimal technical solution, the outer protective layer assembly includes a PVC protective sleeve sleeved on the outer wall of the inner protective layer, and the interior of the PVC protective sleeve is provided with a plurality of groups of S-shaped ring sleeves sleeved on the outer wall of the inner protective layer and staggered and clamped, and each group of the S-shaped ring sleeves has a notch reserved in the curved outer wall, and the outer wall of the inner protective layer is located at the bottom of each group of S-shaped ring sleeves. The conical rubber arc strip is fixed to the outer wall of the inner protective layer, and the inner wall of the PVC protective sleeve is fixed with a plurality of groups of rubber arc strips in contact with the outer wall of the inner protective layer through the notch.

[0008] As an optimal technical solution, the inner wall of the inner protective layer is provided with an insulating layer in contact with the outer wall of the polygonal elastic frame, and multiple groups of elastic columns are assembled in the insulating layer, and the multiple groups of elastic columns are distributed in the insulating layer in a ring array.

[0009] As a preferred technical solution, an inner filling layer is provided between two adjacent groups of the force unloading components, and the outer wall of the inner filling layer is in a state of tight contact with the insulating layer.

[0010] As an optimal technical solution, multiple groups of T-shaped seats and movable rods divide the interior of the polygonal elastic frame into five unit spaces. Multiple groups of airbag columns are provided on the outside of the wire core in each group of the unit spaces, and arc-shaped columns are used to fix the two connected groups of airbag columns in series.

[0011] As a preferred technical solution, the front and rear sides of the fan-shaped notch are both provided with blocking pieces fixed to the inner wall of the polygonal elastic frame.

[0012] As a preferred technical solution, a circular hole is opened on the outer wall of the restraint ring for the movable rod to enter and exit, and both ends of the movable rod are spherical.

[0013] In summary, the present invention mainly has the following beneficial effects:

[0014] The present invention uses elastic fasteners inside the cable to respond to the pressure on the wire core when the cable is bent, and uses the deformation of the elastic member to offset the decomposition, thereby protecting the wire core from being squeezed and damaged. At the same time, it generates a reverse recovery force on the bent wire part, so that the bending angle of the wire is larger, which can prevent the electric barrier from being blocked by foreign objects when it is pulled. The S-shaped ring sleeve close to the outer layer and the PVC protective sleeve can enhance the tensile strength of the cable, so that the outer protective sleeve will not easily crack or break. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention;

[0016] Figure 2 It is a cutaway structural diagram of the present invention;

[0017] Figure 3 Schematic diagram of the three-dimensional structure of the S-shaped ring sleeve of the present invention;

[0018] Figure 4 A partially cutaway view of an S-shaped ring sleeve of the present invention;

[0019] Figure 5 It is a cutaway plan view of the end face of the present invention;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the force unloading assembly of the present invention;

[0021] Figure 7 It is a side cutaway plan view of the outer protective layer assembly of the present invention.

[0022] In the figure: 100, outer protective layer assembly;

[0023] 101, PVC protective sleeve; 102, S-shaped ring; 103, notch; 104, tapered rubber arc strip; 105, rubber arc strip;

[0024] 110. Inner protective layer; 120. Wire core; 130. Inner filling layer; 140. Force unloading assembly; 141. Multilateral elastic frame; 142. T-shaped seat; 143. Movable rod; 144. Elastic fastener; 145. Constraint ring; 146. Lining elastic member; 147. Fan-shaped notch; 148. Positioning channel; 150. Insulation layer; 160. Elastic column; 170. Airbag column; 171. Arc column. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0026] The following describes an embodiment of the present invention based on its overall structure.

[0027] An intelligent 10kV medium voltage coal mining machine frequency conversion cable, such as Figures 1 to 7 As shown in the figure, it includes an outer protective layer assembly 100, the interior of the outer protective layer assembly 100 is equipped with multiple groups of wire cores 120 for transmitting electrical energy, the outer walls of the multiple groups of wire cores 120 are evenly spaced and equipped with force unloading assemblies 140, and the outer walls of the force unloading assemblies 140 are covered with an inner protective layer 110 connected to the inner wall of the outer protective layer assembly 100;

[0028] The force unloading assembly 140 includes a polygonal elastic frame 141 assembled on the outside of the multiple groups of wire cores 120. The inner wall of the polygonal elastic frame 141 is equipped with multiple groups of T-shaped seats 142. The center position of the polygonal elastic frame 141 is located between the multiple groups of wire cores 120 and is provided with a restraining ring 145. The inner center position of the restraining ring 145 is equipped with an inner lining elastic member 146. A movable rod 143 is slidably provided in each group of T-shaped seats 142 and extends into the restraining ring 145 to contact the inner lining elastic member 146. A positioning channel 148 is reserved in the T-shaped seat 142 at the contact position with the movable rod 143. A fan-shaped notch 147 connected to the positioning channel 148 is opened on the side of the T-shaped seat 142 that is in contact with the inner wall of the polygonal elastic frame 141. An elastic fastener 144 that contacts the end of the movable rod 143 is assembled in the fan-shaped notch 147.

[0029] The outer protective layer assembly 100 includes a PVC protective sleeve 101 that is sleeved on the outer wall of the inner protective layer 110. The interior of the PVC protective sleeve 101 is provided with multiple groups of S-shaped ring sleeves 102 that are sleeved on the outer wall of the inner protective layer 110 and are staggered and clamped. The curved outer wall of each group of S-shaped ring sleeves 102 is reserved with a notch 103. The outer wall of the inner protective layer 110 is located at the bottom of each group of S-shaped ring sleeves 102 and is provided with a conical rubber arc strip 104. The conical rubber arc strip 104 is fixed to the outer wall of the inner protective layer 110. The inner wall of the PVC protective sleeve 101 is fixed with multiple groups of rubber arc strips 105 that contact the outer wall of the inner protective layer 110 through the notch 103.

[0030] When the cable is pulled and moves and bends, the polygonal elastic frame 141 can be deformed inward, causing the T-shaped seat 142 on the inner wall to move closer to the center. Since the movable rod can serve as a support, the lining elastic member 146 and the elastic fastener 144 are deformed synchronously at this time, so that the space around the wire core 120 is reduced. Since the airbag column 170 can be deformed, the external force it suffers will be offset and decomposed by the deformation of the lining elastic member 146 and the elastic fastener 144, avoiding transmission to the wire core 120 and causing damage. Similarly, the lining elastic member 146 and the elastic fastener 144 will also generate a reverse force, causing the bent cable to move closer to a straight line, so that the cable can be pulled more smoothly.

[0031] The interlocking S-shaped rings 102 are in close contact due to the traction force, and the conical rubber arc strips 104 prevent the S-shaped rings 102 from stretching along the cable axis, thereby increasing their yield strength under lateral tension. At the same time, the rubber arc strips 105 provide a small space for the movement of the S-shaped rings 102, making the cable more effective in coping with lateral tension.

[0032] Please refer to Figure 5 The inner wall of the inner protective layer 110 is provided with an insulating layer 150 in contact with the outer wall of the polygonal elastic frame 141. The insulating layer 150 is equipped with multiple groups of elastic columns 160, which are distributed in the insulating layer 150 in a ring array.

[0033] The insulating layer 150 is used to insulate and protect the exterior of the cable. Assisted by the multiple sets of elastic columns 160, the cable can bend naturally to a greater degree, thereby preventing the internal wire core 120 from being squeezed and damaged.

[0034] Please refer to Figure 2 and Figure 4 An inner filling layer 130 is provided between two adjacent groups of force unloading components 140 , and the outer wall of the inner filling layer 130 is in close contact with the insulating layer 150 .

[0035] The filling layer is used to constrain the wire core 120 , preventing it from deviating within the inner protective layer 110 and eliminating extrusion damage. At the same time, it can prevent heat from affecting the normal use of the wire core 120 .

[0036] Please refer to Figure 5 Multiple groups of T-shaped seats 142 and movable rods 143 divide the interior of the polygonal elastic frame 141 into five unit spaces. In each group of unit spaces, multiple groups of airbag columns 170 are arranged on the outside of the wire core 120, and the two connected groups of airbag columns 170 are fixed in series with arc-shaped columns 171.

[0037] Please refer to Figure 6 The front and rear sides of the fan-shaped notch 147 are both provided with blocking pieces fixed to the inner wall of the polygonal elastic frame 141 .

[0038] The purpose of constraining the elastic fastener 144 is to make it deform along a preset trajectory, thereby preventing it from deviating from the fan-shaped notch 147 and affecting the protection effect of the cable.

[0039] Please refer to Figure 6 The outer wall of the restraint ring 145 is provided with a circular hole for the movable rod 143 to enter and exit, and both ends of the movable rod 143 are spherical.

[0040] The movable rod 143 is moved along the axis of the circular hole to deform the elastic fastener 144 and the lining elastic member 146 , thereby achieving a buffering effect.

[0041] During use, when the cable is pulled and moved and bends, the polygonal elastic frame 141 can be deformed inward, causing the T-shaped seat 142 on the inner wall to move closer to the center. Since the movable rod can serve the purpose of support, the lining elastic member 146 and the elastic fastener 144 are deformed synchronously at this time, so that the space around the wire core 120 is reduced. Since the airbag column 170 can be deformed, the external force it suffers will be offset and decomposed by the deformation of the lining elastic member 146 and the elastic fastener 144, avoiding transmission to the wire core 120 and causing damage. Similarly, the lining elastic member 146 and the elastic fastener 144 will also generate a reverse force, causing the bent cable to move closer to a straight line, so that the cable can be pulled more smoothly.

[0042] The interlocking S-shaped rings 102 will be in close contact due to the traction force, and the conical rubber arc strips 104 will prevent the S-shaped rings 102 from stretching along the cable axis, thereby increasing its yield strength under lateral tension. At the same time, the rubber arc strips 105 will also provide a small space for the movement of the S-shaped rings 102, so that the cable can better cope with lateral tension. The parts not involved in this device are the same as those in the prior art or can be implemented using prior art.

[0043] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An intelligent 10kV medium voltage coal mining machine frequency conversion cable, comprising an outer protective layer assembly (100), characterized in that: The outer protective layer assembly (100) is internally equipped with a plurality of groups of electric wire cores (120) for transmitting electric energy, and the outer walls of the plurality of groups of electric wire cores (120) are evenly spaced and equipped with force unloading assemblies (140), and the outer walls of the force unloading assemblies (140) are covered with an inner protective layer (110) connected to the inner wall of the outer protective layer assembly (100); The force unloading assembly (140) comprises a polygonal elastic frame (141) mounted on the outside of a plurality of groups of electric wire cores (120), the inner wall of the polygonal elastic frame (141) is equipped with a plurality of groups of T-shaped seats (142), the center position of the polygonal elastic frame (141) is located between the plurality of groups of electric wire cores (120) and a restraining ring (145) is provided, the inner center position of the restraining ring (145) is equipped with an inner lining elastic member (146), and each group of the T-shaped seats (142) is provided with a sliding member extending to about A movable rod (143) in contact with an inner lining elastic member (146) is provided in the collar (145); a positioning channel (148) is reserved in the T-shaped seat (142) at a position in contact with the movable rod (143); a fan-shaped notch (147) in contact with the positioning channel (148) is provided on a side of the T-shaped seat (142) that is in contact with the inner wall of the polygonal elastic frame (141); an elastic fastener (144) in contact with the end of the movable rod (143) is assembled in the fan-shaped notch (147).

2. The intelligent 10kV medium voltage coal mining machine frequency conversion cable according to claim 1 is characterized in that: The outer protective layer assembly (100) comprises a PVC protective sleeve (101) sleeved on the outer wall of the inner protective layer (110); the interior of the PVC protective sleeve (101) is provided with a plurality of groups of S-shaped ring sleeves (102) sleeved on the outer wall of the inner protective layer (110) and interlaced and clamped; a notch (103) is reserved on the curved outer wall of each group of the S-shaped ring sleeves (102); the outer wall of the inner protective layer (110) is provided with a conical rubber arc strip (104) at the bottom of each group of the S-shaped ring sleeves (102); and the conical rubber arc strip (104) is fixed to the outer wall of the inner protective layer (110); and the inner wall of the PVC protective sleeve (101) is fixed with a plurality of groups of rubber arc strips (105) in contact with the outer wall of the inner protective layer (110) through the notch (103).

3. The intelligent 10kV medium voltage coal mining machine frequency conversion cable according to claim 1, characterized in that: The inner wall of the inner protective layer (110) is provided with an insulating layer (150) in contact with the outer wall of the polygonal elastic frame (141); a plurality of groups of elastic columns (160) are assembled in the insulating layer (150); and the plurality of groups of elastic columns (160) are distributed in the insulating layer (150) in a ring array.

4. The intelligent 10kV medium voltage coal mining machine frequency conversion cable according to claim 3 is characterized by: An inner filling layer (130) is provided between two adjacent groups of the force unloading components (140), and the outer wall of the inner filling layer (130) is in a state of tight contact with the insulating layer (150).

5. The intelligent 10kV medium voltage coal mining machine frequency conversion cable according to claim 1, characterized in that: Multiple groups of T-shaped seats (142) and movable rods (143) divide the interior of the polygonal elastic frame (141) into five unit spaces. Multiple groups of airbag columns (170) are provided outside the wire core (120) in each group of the unit spaces. Two connected groups of airbag columns (170) are fixed in series using arc-shaped column members (171).

6. The intelligent 10kV medium voltage coal mining machine frequency conversion cable according to claim 1, characterized in that: The front and rear sides of the fan-shaped notch (147) are both provided with blocking pieces fixed to the inner wall of the polygonal elastic frame (141).

7. The intelligent 10kV medium voltage coal mining machine frequency conversion cable according to claim 1, characterized in that: The outer wall of the restraining ring (145) is provided with a circular hole for the movable rod (143) to enter and exit, and both ends of the movable rod (143) are spherical.

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