Stripping equipment for wire or cable insulation

Abstract

The invention discloses stripping equipment for wire or cable insulation. The stripping equipment comprises a rack; the blocking assembly is used for blocking an insulating layer of the electric wire or the cable and allowing a conductor or a cable core to pass through; the connecting assembly is connected with the conductor or the cable core penetrating through the blocking assembly; the driving assembly is installed on the rack, the blocking assembly is fixed to the rack, and the driving assembly is connected with the connecting assembly; or the connecting assembly is fixed with the rack, and the driving assembly is connected with the blocking assembly. According to the invention, an insulating layer in an electric wire can be easily separated from a conductor, or a cable core in a cable can be easily separated from the insulating layer, and the device has the characteristics of small damage to the conductor and the insulating layer, high efficiency, time saving and labor saving. And particularly, the problem that the conductor and the insulator of the similar PEEK (polyether-ether-ketone) insulated wire and cable are very difficult to separate is solved.

Description

Technical Field

[0001] The invention relates to the field of cables or cable technology, in particular to a device for stripping insulation of electric wires or cables. Background Art

[0002] Wires or cables transmit electricity or signals from one place to another. Wires are usually composed of a conductor and an outer insulation that wraps the conductor, and cables are usually composed of a cable core and an outer insulation that wraps the cable core (the outer insulation in the cable is called an outer sheath in the industry, and this application uses a unified term, called outer insulation), and the cable core has at least a conductor and an inner insulation that wraps the conductor. It can be seen from the structure of the wire or cable that the conductor and insulation are essential components of the wire or cable. Insulating materials usually include polyvinyl chloride (PVC), polyethylene (PE), cross-linked polyethylene (XLPE), cross-linked polyolefin (XLPO), polyetheretherketone (PEEK), etc. The insulating material is usually heated by an extruder and wrapped on the conductor through a mold extrusion method.

[0003] After the production of wires or cables is completed, it is usually necessary to take samples of the finished wires or cables for electrical and mechanical performance tests to check whether the finished wires or cables meet the corresponding requirements. For example, after sampling the external insulation, the mechanical performance test is performed on the external insulation to determine whether the product is qualified.

[0004] When conducting mechanical property tests on external insulation, the external insulation must first be stripped from the conductor without damaging the insulation. For insulation made of polyvinyl chloride (PVC), polyethylene (PE), cross-linked polyethylene (XLPE), and cross-linked polyolefin (XLPO), the covering force formed on the conductor is relatively small, and stripping tools such as wire strippers can usually be used to strip the insulation.

[0005] For example, special high-temperature wires (PEEK wires) are key components in the fields of aviation, nuclear power, and shipbuilding. Traditional fluoroplastic wires have been banned in many fields due to environmental protection requirements. Therefore, the market for special high-temperature wires (PEEK wires) will grow in the future. The United States is already formulating PEEK wire standards.

[0006] For insulation made of PEEK, PEEK is a linear aromatic semi-crystalline polymer material with unique comprehensive properties. It has excellent high temperature resistance and excellent electrical properties. PEEK has high strength and high viscosity. The tensile strength of PEEK is about 10 times that of polyvinyl chloride (PVC). Based on the properties of polyetheretherketone, polyetheretherketone has high insulation strength and strong coating on conductors. It is very difficult to strip 100 mm of insulation from the conductor; either the conductor is pulled apart or the insulation is damaged, which does not meet the standard requirements. Especially 1.5mm 2The conductor of wires or cables below 10mm is very easy to break. 2 For the above wires or cables, the conductor pull-out force is greater than 800N, which is very difficult for operators. The insulation stripping force of special high-temperature wires and cables (PEEK wires) needs to be around 800N, and during the stripping process, the conductor (the conductor is generally formed by twisting metal wires) must not be damaged. Therefore, it is very difficult to strip the insulation of PEEK.

[0007] The current method of stripping PEEK insulation is to use a cutting tool to cut the PEEK insulation according to the required size, one operator uses a clamp to clamp the head of the insulation, and the other operator holds the cable. The two operators apply tension respectively to strip the PEEK insulation from the cable. For this method, the operator is not only laborious, but also due to the inconsistent pulling force, it is easy to break the conductor, causing the conductor to remain on the inner wall of the insulation. When the stripped PEEK insulation is used for stretching and other tests, due to the interference of the residual metal wire, the test is inaccurate, so it is often not used for testing, so the above stripping method is easy to fail. In addition, the above method has stretched the PEEK insulation during the stripping process, so it will also cause inaccurate testing. Summary of the invention

[0008] The invention provides a device for stripping the insulation of a wire or cable. The device can easily separate the insulation layer from the conductor in the wire, or separate the cable core from the insulation layer in the cable, and has the characteristics of little damage to the conductor and insulation, high efficiency, and time and labor saving.

[0009] The technical solutions to the above technical problems are as follows:

[0010] Equipment for stripping insulation from wire or cable, including:

[0011] frame;

[0012] A barrier component that forms a barrier to the insulation layer of a wire or cable and allows the conductor or cable core to pass through;

[0013] A connection assembly connected to the conductor or cable core passing through the barrier assembly;

[0014] A driving assembly is mounted on the frame, the blocking assembly is fixed to the frame, and the driving assembly is connected to the connecting assembly; or

[0015] The connecting component is fixed to the frame, and the driving component is connected to the blocking component.

[0016] In the present invention, since a portion of the conductor or cable core is blocked by the blocking component after passing through the blocking component, the conductor or cable core is connected to the connecting component, and the connecting component moves linearly under the action of the driving component to pull out the conductor or cable core, while the insulating layer is blocked by the blocking component and stabilized in the original position. Therefore, when the conductor or cable core is subjected to the pulling force of the connecting component, the insulating layer will not move with the conductor or cable core, and the conductor or cable core will eventually be separated from the insulating layer, that is, the required insulating layer will be peeled off. The conductor cross-section of the wire or cable is different, and the pulling force and speed used are also different, so wires or cables with different cross-sectional areas require different pulling forces and speeds.

[0017] The present invention adopts the above-mentioned equipment to replace the manual stripping operation of the insulation layer, especially the stripping of the insulation layer with strong covering force of the conductor or cable core, which not only saves time and labor, but also does not damage the insulation layer, so that the subsequent test data of the mechanical properties of the insulation are true and reliable. In addition, since the clamping assembly clamps the conductor or cable core as a whole, the conductor or cable core will not be damaged during the stripping process, and the metal wire in the conductor or cable core will not remain in the insulation layer, which also ensures the authenticity of the subsequent insulation layer detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of the device for stripping insulation of an electric wire or cable according to the present invention.

[0019] Figure 2 It is a three-dimensional diagram of the first connecting component.

[0020] Figure 3 A perspective view of a blocking component.

[0021] Figure 4 An exploded view of the barrier assembly.

[0022] Figure 5 A side view of the connection assembly.

[0023] Figure 6 a-6d Schematic diagram of the process of stripping the cable core and insulation layer from the sampled cable.

[0024] Markings in the accompanying drawings:

[0025] Frame A, base 10, intermediate body 11, upper seat 12, first connecting component 13, sleeve 13a, connecting rod 13b, locking hole 13c, control panel 14.

[0026] Blocking component B, tubular component 20, cylinder 20a, first supporting component 20b, second connecting sleeve 20c, first hole 20d, second hole 20e, clearance opening 20f, second connecting component 21, retaining ring 22, locking component 23.

[0027] Connecting assembly C, support seat 30, support plate 31, movable plate 32, support rod 33, driving rod 34, spring 35, convex teeth 36, handle 37.

[0028] Driving assembly D, screw 40, nut 41, linear guide 42, screw support 43, motor 44.

[0029] Insulation layer H, manually stripped portion H1. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 5 As shown, the stripping device for wire or cable insulation of the present invention includes a frame A, a blocking component B, a connecting component C, and a driving component D. The various components and the relationship between them are described in detail below.

[0032] The frame A includes a base 10, an intermediate body 11, an upper seat 12, and a first connecting component 13 connected to the blocking component B or the connecting component C. The two ends of the intermediate body 11 are respectively fixed to the base 10 and the upper seat 12, and at least one end of the base 10 and the upper seat 12 extends beyond the side of the intermediate body 11. In this way, a groove is formed between the base 10, the intermediate body 11, and the upper seat 12, and the blocking component B, the connecting component C, and the driving component D are located in the groove.

[0033] The intermediate body 11 is a shell, in which a PCB board is installed. A control circuit (not shown in the figure) is arranged on the PCB board. A control panel 14 is arranged on the shell. The control panel 14 is provided with buttons and a display screen. The control panel 14 is electrically connected to the PCB board, and the PCB board is electrically connected to the drive component D. The operator can set the tension and peeling speed through the buttons. After obtaining these input signals, the PCB board outputs a control signal to control the operation of the drive component D.

[0034] The control circuit is usually composed of a single chip microcomputer and peripheral circuits. The structure of the control circuit for controlling tension and speed belongs to the prior art and will not be described here. If the drive component D includes components such as a motor, the control circuit is used to control the working current of the drive component D so that the motor outputs different tensions and speeds. If the drive component D includes a solenoid valve and a cylinder or a hydraulic cylinder, the control circuit is used to control the opening of the solenoid valve so that the gas or liquid fluid medium has different speeds and pressures, so that the cylinder or hydraulic cylinder outputs different tensions and speeds.

[0035] The first connecting component 13 is fixed to one end of the upper seat 12. The first connecting component 13 includes a sleeve 13a and a connecting rod 13b. One end of the connecting rod 13b is fixed to the upper seat 12, and the other end of the connecting rod 13b is fixed to the sleeve 13a. A locking hole 13c is provided on the circumference of the sleeve 13a.

[0036] The blocking component B blocks the insulating layer H of the wire or cable and allows the conductor or cable core L to pass through. The blocking component B includes a cylindrical component 20, a second connecting component 21, and a blocking ring 22 that blocks the insulating layer H of the wire or cable and allows the conductor or cable core L to pass through. One end of the cylindrical component 20 is connected to one end of the second connecting component 21, and the blocking ring 22 is arranged at the other end of the cylindrical component 20.

[0037] In this embodiment, the second connecting component 21 is a rod-shaped component, and a through hole is provided on the second connecting component 21. The second connecting component 21 is inserted into the sleeve 13a. The locking component 23 is passed through the locking hole 13c and the through hole on the second connecting component 21 to fix the second connecting component 21 and the sleeve 13a into one. The second connecting component 21 can adopt a pin shaft or a cotter pin. In this embodiment, the second connecting component 21 preferably adopts a cotter pin. The locking component 23 can be used to quickly tighten the second connecting component 21 and the sleeve 13a, or the second connecting component 21 can be separated from the sleeve 13a.

[0038] The cylindrical component 20 includes a cylindrical body 20a, a first supporting part 20b, and a second connecting sleeve 20c. The first supporting part 20b is provided with a first hole 20d and a second hole 20e. The first hole 20d and the second hole 20e constitute a step hole. One end of the cylindrical body 20a extends into the first hole 20d and is fixed to the first supporting part 20b. The retaining ring 22 cooperates with the step surface of the step hole.

[0039] In this embodiment, an internal thread is provided on the inner wall surface of the first support member 20b, and an external thread is provided on one end of the cylinder 20a. One end of the cylinder 20a extends into the first hole 20d and is connected to the first support member 20b by threading so that the two are fixed. In addition, since the diameters of the center holes of the retaining ring 22 required for wires or cables of different diameters are inconsistent, it is necessary to select a retaining ring 22 with a corresponding center hole diameter according to the wires or cables of corresponding diameters. In this embodiment, when in use, the operator places the retaining ring 22 on the step surface of the step hole, that is, the retaining ring 22 is not fixed to the first support member 20b, so that when the retaining ring 22 needs to be replaced, the purpose of quickly replacing the retaining ring 22 can be achieved.

[0040] The cylindrical component 20 also includes a connecting sleeve 20c with one end closed and the other end having an opening. The second connecting component 21 is fixed to one end of the connecting sleeve 20c. An internal thread is provided on the inner wall of the connecting sleeve 20c. An external thread is provided on the other end of the cylinder 20a. The connecting sleeve 20c is connected to the cylinder 20a through threads.

[0041] The circumferential surface of the cylinder 20a is provided with a clearance opening 20f for placing the wire or cable into the inner cavity of the cylinder 20a. Before stripping the insulating layer H, the wire or cable enters the inner cavity of the cylinder 20a through the clearance opening 20f. When the retaining ring 22 is assembled, the retaining ring 22 enters the inner cavity of the cylinder 20a through the clearance opening 20f. Therefore, the installation of the wire or cable and the retaining ring 22 is very convenient through the clearance opening 20f.

[0042] Of course, if the clearance opening 2f is not provided, the wire or cable can be first placed into the inner cavity of the cylinder 20a from one end of the cylinder 20a, and the conductor or cable core L can be passed through the retaining ring 22 and the first support component 20b, and then the first support component 20b can be connected to the cylinder 20a. Although the wire or cable can still be assembled with the blocking component B without the clearance opening 20f, this installation method is obviously not as simple as the method with the clearance opening 20f.

[0043] The connecting component C is connected to the conductor or cable core L passing through the blocking component B. In this embodiment, the connecting component C preferably adopts a clamping component, which can clamp the conductor or cable core L, thereby fastening the blocking component B to the conductor or cable core L.

[0044] The clamping assembly in this embodiment includes a support seat 30, a support plate 31, a movable plate 32, a support rod 33, and a driving rod 34. The movable plate 32 is located between the support seat 30 and the support plate 31, the support seat 30 is fixed to the driving assembly D, the support rod 33 passes through the support plate 31 and the movable plate 32 and is fixed to the support seat 30, the support rod 33 is fixedly connected to the support plate 31, the support rod 33 and the movable plate 32 are slidably matched, the driving rod 34 passes through the support plate 31, the driving rod 34 is threadedly connected to the support plate 31, and the end of the driving rod 34 is matched with the end face of the movable plate 32.

[0045] In this embodiment, the clamping assembly also includes a spring 35, which is sleeved on the support rod 33. One end of the spring 35 abuts against the support seat 30, and the other end of the spring 35 abuts against the movable plate 32. Through the action of the spring 35, the movable plate 32 and the end of the driving rod 34 are kept abutting against each other.

[0046] In this embodiment, the end faces of the support seat 30 and the movable plate 32 facing each other are provided with convex teeth 36 . When the support seat 30 and the movable plate 32 clamp the conductor or cable core L, the convex teeth 36 can clamp the conductor or cable core L more tightly.

[0047] In this embodiment, the clamping assembly also includes a handle 37, which passes through the drive rod 34. The handle 37 can be used to apply torque to the drive rod 34, so as to push the movable plate 32 to generate a pressing force on the conductor or cable core L.

[0048] In this embodiment, the driving assembly D is mounted on the frame A, the blocking assembly B is fixed to the frame A, and the driving assembly D is connected to the connecting assembly C; that is, the second connecting component 21 is inserted into the sleeve 13a, and the locking component 23 is passed through the locking hole 13c and the through hole on the second connecting component 21 to fasten the second connecting component 21 to the sleeve 13a. The supporting seat 30 is fixed to the driving assembly D.

[0049] The driving assembly D is a linear drive. In this embodiment, the linear drive includes a screw 40, a nut 41, a linear guide 42, a screw support 43, and a motor 44. The screw support 43 is fixed to the frame A, the screw support 43 is fixed to the intermediate body 11 in the frame A, the screw 40 is connected to the screw support 43, the screw support 43 is composed of a seat body and a bearing mounted on the seat body, and the screw 40 is connected to the bearing, so that under the action of torsion, the screw 40 can rotate relative to the seat body. The motor 44 is located inside the base 10, the motor 44 is connected to the screw 40, the nut 41 is threadedly connected to the screw 40, the nut 41 is slidably matched with the linear guide 42, the linear guide 42 is fixed to the intermediate body 11, and the blocking assembly B or the connecting assembly C is fixed to the nut 41.

[0050] The usage process of this embodiment is as follows:

[0051] like Figure 6 a. Cut a section of the finished wire or cable on the production line to obtain a sample wire or cable. The material of the insulation layer H of the sample wire or cable is polyetheretherketone. Cut the sample wire or cable on the insulation layer H with a cutting tool to form an incision on the insulation layer H. The distance between the incision and the end of the sample wire or cable is the manually stripped part H1( Figure 6b) The length of the manually stripped portion H1 is less than 60 mm. The manually stripped portion H1 is separated from the conductor or cable core L by a tool, such as directly cutting the manually stripped portion H1 with a knife, or separating the manually stripped portion H1 with a wire stripper. Since the manually stripped portion H1 is short, it is easier to separate the manually stripped portion H1 in the above manner. Moreover, the purpose of separating the manually stripped portion H1 from the conductor or cable core L is to expose the conductor or cable core L of the wire or cable so as to clamp the conductor or cable core L during the subsequent formal stripping. Even if a small portion of the conductor or cable core L is damaged, it will not affect the subsequent formal stripping.

[0052] After a short section of conductor or cable core L (e.g., 50 mm in length) is exposed through the above process, the wire or cable is passed through the opening 20f and into the cylinder 20a. After the conductor or cable core L passes through the center hole of the retaining ring 22 and the first supporting member 20b, the head of the conductor or cable core L is exposed outside the blocking component B. The driving component D is started to rotate the motor 44 forward, the motor 44 drives the screw rod 40 to rotate forward, and the screw rod 40 drives the nut 41 to carry the connecting component C to the head of the conductor or cable core L (from Figure 1 The connecting component C moves upward (in the figure), and after the head of the conductor or cable core L enters the gap space between the support seat 30 and the movable plate 32, the motor stops working, the connecting component C stops feeding the conductor or cable core L, and the driving rod 34 is rotated by the handle 37. The driving rod 34 drives the movable plate 32 to move linearly along the support rod 33, so that the head of the conductor or cable core L is clamped between the movable plate 32 and the support seat 30.

[0053] After ensuring that the head of the conductor or cable core L is clamped and the end of the insulating layer H is against the end face of the retaining ring 22, the tension and speed are set through the control panel 14, and the drive component D is started to reverse the motor 44, and the motor 44 drives the screw rod 40 to reverse, and the screw rod 40 drives the nut 41 to move linearly downward with the connecting component C. The connecting component C generates a pulling force on the conductor or cable core L. Since the end of the insulating layer H is blocked by the retaining ring 22, the insulating layer H cannot move with the conductor or cable core L, thereby forcing the conductor or cable core L to gradually separate from the insulating layer H ( Figure 6 c).

[0054] As the driving component D continuously drives the connecting component C to move downward, the conductor or cable core L is finally completely separated from the insulating layer H, so that the insulating layer H is stripped off to obtain the insulating layer H ( Figure 6 d).

[0055] The present invention is not limited to the above embodiments, for example:

[0056] The connecting component C can be fixed to the frame A, and the driving component D can be connected to the blocking component B.

[0057] In the blocking assembly B, the first supporting member 20b may not be used, and a threaded connection portion may be provided at one end of the blocking ring 22, and the threaded connection portion may be threadedly connected to the cylinder 20a. This method is also convenient for replacing the blocking ring 22 as needed.

[0058] The clamping assembly can use pneumatic fingers instead of the above structure.

[0059] The screw rod 40, the nut 41 and the motor 44 in the driving assembly D can be replaced by a cylinder or a hydraulic cylinder.

[0060] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the structures of the above embodiments and equivalent changes made according to the claims of this application are still within the scope covered by this application.

Claims

1. A device for stripping insulation of wires or cables, characterized in that include: Rack (A); A barrier component (B) that forms a barrier to the insulation layer (H) of a wire or cable and allows the conductor or cable core (L) to pass through; A connection assembly (C) connected to the conductor or cable core (L) passing through the barrier assembly (B); A driving assembly (D) is mounted on a frame (A), a blocking assembly (B) is fixed to the frame (A), and the driving assembly (D) is connected to a connecting assembly (C); or The connecting component (C) is fixed to the frame (A), and the driving component (D) is connected to the blocking component (B).

2. The stripping device for wire or cable insulation according to claim 1, characterized in that: The frame (A) comprises a base (10), an intermediate body (11), an upper seat (12), and a first connecting component (13) connected to a blocking component (B) or a connecting component (C); two ends of the intermediate body (11) are respectively fixed to the base (10) and the upper seat (12); at least one end of the base (10) and the upper seat (12) extends beyond the side of the intermediate body (11); and the first connecting component (13) is fixed to one end of the upper seat (12).

3. The stripping device for wire or cable insulation according to claim 1, characterized in that: The blocking component (B) comprises a cylindrical component (20), a second connecting component (21), and a blocking ring (22) which blocks the insulating layer (H) of the electric wire or cable and allows the conductor or cable core (L) to pass through. One end of the cylindrical component (20) is connected to one end of the second connecting component (21), and the blocking ring (22) is arranged at the other end of the cylindrical component (20).

4. The stripping device for wire or cable insulation according to claim 3, characterized in that: The cylindrical component (20) comprises a cylindrical body (20a) and a first supporting component (20b). The first supporting component (20b) is provided with a first hole (20d) and a second hole (20e). The first hole (20d) and the second hole (20e) form a stepped hole. One end of the cylindrical body (20a) extends into the first hole (20d) and is fixed to the first supporting component (20b). The retaining ring (22) cooperates with the stepped surface of the stepped hole.

5. The stripping device for wire or cable insulation according to claim 4, characterized in that The cylindrical component (20) further comprises a connecting sleeve (20c) having one end closed and the other end having an opening, the second connecting component (21) being fixed to one end of the connecting sleeve (20c), the inner wall of the connecting sleeve (20c) being provided with an internal thread, the other end of the cylindrical body (20a) being provided with an external thread, and the connecting sleeve (20c) and the cylindrical body (20a) being connected via threads.

6. The stripping device for wire or cable insulation according to claim 4, characterized in that A clearance opening (20f) for placing an electric wire or cable into the inner cavity of the cylinder (20a) is provided on the peripheral surface of the cylinder (20a).

7. The stripping device for wire or cable insulation according to claim 1, characterized in that: The connecting component (C) is a clamping component.

8. The stripping device for wire or cable insulation according to claim 7, characterized in that The clamping assembly comprises a support seat (30), a support plate (31), a movable plate (32), a support rod (33), and a driving rod (34); the movable plate (32) is located between the support seat (30) and the support plate (31); the support rod (33) passes through the support plate (31) and the movable plate (32) and is fixed to the support seat (30); the support rod (33) is fixedly connected to the support plate (31); the support rod (33) and the movable plate (32) are slidably matched; the driving rod (34) passes through the support plate (31); the driving rod (34) and the support plate (31) are threadedly connected; and the end of the driving rod (34) is matched with the end surface of the movable plate (32).

9. The stripping device for wire or cable insulation according to claim 1, characterized in that: The drive assembly (D) is a linear drive.

10. The stripping device for wire or cable insulation according to claim 9, characterized in that The linear drive comprises a screw rod (40), a nut (41), a linear guide rail (42), a screw rod support (43), and a motor (44); the screw rod support (43) is fixed to a frame (A); the screw rod (40) is connected to the screw rod support (43); the motor (44) is connected to the screw rod (40); the nut (41) is threadedly connected to the screw rod (40); the nut (41) is slidably matched to the linear guide rail (42); and a blocking component (B) or a connecting component (C) is fixed to the nut (41).

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