Elastic insulator

Abstract

The present application relates to insulator, especially to track contact network suspension device, including insulating core rod, wire clamp body and fitting are arranged at both ends of the insulating core rod respectively, the wire clamp body includes the cylinder body containing the insulating core rod and the clamp assembly clamping the conductor, the anti-drop head is arranged at the end of the insulating core rod, the necking is arranged at the end of the cylinder body for the insulating core rod insertion or extension, the necking can hold the anti-drop head and prevent the anti-drop head from separating from the cylinder body, the elastic insulator is filled between the insulating core rod and the cylinder body, and the umbrella skirt covered on the outer layer of the insulator is further included;The technical scheme is adopted, the anti-drop head is arranged at the end of the core rod, the necking is arranged at the end of the cylinder body for the core rod insertion, the necking can hold the anti-drop head and prevent the core rod from separating from the cylinder body after the core rod is placed into the cylinder body, so that the risk of the core rod and the cylinder body separation after the elastic insulator is damaged or aged is avoided, and the safety and reliability when fixing the contact network are improved.

Description

Technical Field

[0001] This invention relates to insulators, and more particularly to suspension devices for railway contact wires. Background Technology

[0002] Elastic insulated suspension assemblies, also known as insulators, possess high axial elasticity and high radial stiffness. In overhead rigid contact networks, they are installed between suspension supports and busbars, serving functions such as suspension, fixation, and insulation. Existing elastic insulated suspension assemblies, such as the structure described in patent 200710070107.3, fill the space between the insulating core rod and the cylinder with elastic insulating material, giving them insulating properties while allowing for some elastic deformation. However, in existing elastic insulated suspension assemblies, there is no connection between the core rod and the cylinder. Once the elastic insulating material ages and deforms due to vibration, the core rod can easily detach from the cylinder, posing a risk of the contact network falling. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a safe and reliable elastic insulator that prevents the core rod from detaching from the cylinder. The technical solution adopted by this invention is as follows:

[0004] An elastic insulator includes an insulating core rod, with a clamp body and fittings respectively provided at both ends of the insulating core rod. The clamp body includes a cylinder for accommodating the insulating core rod and a clamp assembly for holding a conductor. An anti-detachment head is provided at the end of the insulating core rod. A constriction opening is provided at the end of the cylinder where the insulating core rod is inserted or extended, which can lock the anti-detachment head from the cylinder. An elastic insulator is filled between the insulating core rod and the cylinder. The insulator also includes a shed covering the outer layer of the insulator.

[0005] Furthermore, the anti-detachment head is provided with external threads, and the constricted opening is provided with internal threads.

[0006] Furthermore, the anti-detachment head is provided with an elastic buckle.

[0007] Furthermore, the bottom of the clamp body is provided with an opening that communicates with the cylinder.

[0008] Furthermore, the anti-detachment head is detachable and can be inserted into the cylinder from the opening side.

[0009] Furthermore, the elastic insulator material is rubber, thermoplastic polyester elastomer, polyolefin elastomer, or polyurethane, and the skirt material is low-hardness natural rubber, polyurethane rubber, or silicone rubber.

[0010] Furthermore, a waist is provided in the section where the insulating core rod is placed inside the cylinder.

[0011] Furthermore, a set of toothed flanges is provided in the section of the insulating core rod placed inside the cylinder.

[0012] Furthermore, an annular groove is provided at the contact area between the insulating core rod and the umbrella skirt.

[0013] Furthermore, the fitting is a screw connected to an insulating core rod via threads, and a locking nut is also provided on the fitting.

[0014] Furthermore, the clamp body also includes a pair of clamping plates and a base plate connected to the cylinder. The clamping plates are clamped and fixed to the base plate by bolts.

[0015] Furthermore, the clamp body also includes a pair of clamping plates and a base plate connected to the cylinder. The clamping plates are respectively fixed to the base plate by bolts.

[0016] Furthermore, the clamping plate is provided with conductive pads for contact with conductive materials.

[0017] This technical solution features an anti-detachment head at the end of the core rod, and a constriction at the end of the cylinder where the core rod is inserted. When the core rod is inserted into the cylinder, the constriction can lock the anti-detachment head to prevent the core rod from detaching from the cylinder. This avoids the risk of the core rod and cylinder separating when the elastic insulator is damaged or aged, thus improving the safety and reliability of fixing the contact wire. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the mandrel in Embodiment 2 of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of embodiment 3 of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of embodiment 1 of the clamping plate of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of embodiment 2 of the clamping plate of the present invention;

[0025] Figure 8 This is a schematic diagram of the cylindrical structure of the present invention. Detailed Implementation

[0026] To better understand this invention, the technical solution will be described in further detail below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 The elastic insulator shown includes an insulating core rod 1, with a clamp body 2 and a fitting 3 at each end of the insulating core rod 1. The fitting 3 is used to install and fix the elastic suspension device, and the clamp body 2 is used to clamp and fix the conductor. The clamp body 2 includes a cylinder 2-1 and a clamp assembly 2-2. One end of the insulating core rod 1 can be placed inside the cylinder 2-1. An elastic insulator 4 is filled between the insulating core rod 1 and the cylinder 2-1. When the clamp body 2 is under stress, the elastic insulator 4 is compressed and deformed, allowing the entire insulator to adapt to elastic deformation, thereby reducing vibration and noise and preventing rigid fracture. A skirt 5 structure is also provided outside the insulating core rod 1 and the cylinder 2-1 to increase the creepage distance and improve the insulation performance of the insulator.

[0028] Because the insulator has elastic deformation, the elastic insulator 4 will be constantly squeezed and released, making it prone to fatigue damage or aging due to prolonged exposure. To prevent the insulating core rod 1 from detaching from the cylinder 2-1 after the elastic insulator 4 is damaged, an anti-detachment head 1-1 is provided at the end of the insulating core rod 1. Figure 8 As shown, the end of the cylinder 2-1 where the insulating core rod 1 is inserted or extended is provided with a constriction 2-3 that can lock the anti-detachment head 1-1. That is, the outer circumference of the anti-detachment head 1-1 is larger than the inner hole size of the constriction 2-3. In this way, even if the elastic insulator 4 is damaged, fails, or ages, resulting in no constraint between the insulating core rod 1 and the cylinder 2-1, the insulating core rod 1 will not completely detach from the cylinder 2-1, thereby avoiding the risk of the contact wire falling off.

[0029] The specific structure of the insulating core rod is illustrated in the following three embodiments, such as... Figure 3 The anti-detachment head 1-1 shown is provided with an external thread, and an internal thread is provided at the constriction 2-3 part of the cylinder 2-1. By turning the thread, the anti-detachment head 1-1 can be sent into the cylinder 2-1. When the insulating core rod 1 is pulled out from the cylinder 2-1, the anti-detachment head 1-1 cannot be pulled out if it does not rotate, thus ensuring that the insulating core rod 1 cannot be separated from the cylinder 2-1.

[0030] like Figure 4 The anti-detachment head 1-1 shown is equipped with an elastic buckle 1-2. When the insulating core rod 1 is inserted into the cylinder 2-1, the elastic buckle 1-2 can retract, allowing the insulating core rod 1 to smoothly enter the cylinder 2-1. When the insulating core rod 1 is pulled out of the cylinder 2-1, the elastic buckle 1-2 cannot retract and is blocked by the constriction 2-3, thus ensuring that the insulating core rod 1 cannot be detached from the cylinder 2-1.

[0031] like Figure 5The anti-slip head 1-1 shown is a detachable structure, such as... Figure 2 The bottom of the online clamp body 2 shown has an opening 2-4 communicating with the cylinder 2-1. The anti-detachment head 1-1 cannot be inserted into the cylinder 2-1 from the constricted end, but can be inserted into the cylinder 2-1 from the opening 2-4. Then, the anti-detachment head 1-1 is installed and fixed onto the insulating core rod 1. Alternatively, the anti-detachment head 1-1 can be integrated with the insulating core rod 1. During installation, the insulating core rod 1 is inserted from the opening 2-4 and then extends from the constricted end 2-3. In this structure, the end of the insulating core rod 1 that is fitted with the hardware 3 does not have a special structure to allow the insulating core rod 1 to extend from the constricted end 2-3.

[0032] The insulator has sufficient elastic deformation margin in the radial direction, and in order to have sufficient deformation margin in the axial direction, such as Figure 3 As shown, a waist 1-3 (i.e., the middle part is tightened inward so that the middle dimension is smaller than the dimensions at both ends) is provided at the part where the insulating core rod 1 is placed inside the cylinder 2-1, or as shown. Figure 4 As shown, a toothed flange 1-4 is provided at the location where the insulating core rod 1 is placed inside the cylinder 2-1. When elastic deformation occurs in the axial direction, the location of the waist 1-3 or the toothed flange 1-4 will compress the elastic insulating material, thereby achieving elastic deformation of the insulator. Alternatively, [the following can be used]... Figure 2 The structure shown allows sufficient space between the end of the insulating core rod 1 and the clamp body 2 to fill the elastic insulator 4 to accommodate axial elastic deformation. Similarly, to ensure a firm connection between the insulating core rod 1 and the skirt 5, annular grooves 1-5 are provided at the contact area between the insulating core rod 1 and the skirt.

[0033] The material of the elastic insulator 4 in the above-mentioned insulator can be set as rubber, thermoplastic polyester elastomer, polyolefin elastomer, polyurethane elastomer, etc.; according to the elasticity and process characteristics, polyurethane material and casting process are preferred. Polyurethane material not only has good strength and good rebound cushioning effect, meeting the working requirements of composite elastic suspension components, but more importantly, due to the diversity of polyurethane material types and properties, polyurethane casting process is preferred for elastic insulators, saving mold processing costs, enabling continuous production, and high efficiency. Its strength and rebound performance rely on the chemical reaction between the two components of polyurethane, and are less dependent on external conditions.

[0034] The umbrella skirt 5 can be made of low-hardness natural rubber or polyurethane rubber, with an approximately 30μm thick organic silicone nano-waterproof coating applied to the outside (to further enhance insulation, waterproofing, and stain resistance), or silicone rubber. Silicone rubber and a specialized injection molding process are preferred. Silicone rubber is a chain-like molecular structure composed of Si-O (silicon-oxygen) bonds, resulting in relatively weak intermolecular forces and excellent resilience. It also exhibits excellent stain resistance and self-cleaning properties. Furthermore, silicone rubber is unaffected by ozone, and its physical properties change only slightly under prolonged exposure to ultraviolet radiation and other climatic conditions. In addition, silicone rubber has high resistivity, exhibiting excellent insulation properties, and its resistance remains stable over a wide temperature and frequency range.

[0035] To facilitate the installation and fixing of the conductor, the wire clamp body 2 also includes a pair of clamping plates 2-5 and a base plate 2-6 disposed at the bottom of the cylinder 2-1, such as Figure 6 The clamping plates 2-5 are bolted together to clamp the base plate 2-6, thereby fixing the clamping plates 2-5 onto the base plate 2-6; or as shown in the figure Figure 7 The structure shown uses bolts to fix the two clamping plates 2-5 to the base plate 2-6 respectively, thus achieving installation and fixation. In order to facilitate the movement of the insulator, based on the above two embodiments, a conductive sliding pad 2-7 is also provided on the clamping plate 2-5 to facilitate the movement of the conductor on the insulator during installation.

[0036] To ensure that the fitting 3 is locked and fixed to the insulating core rod 1, a locking nut 6 is provided on the fitting 3 to prevent the fitting 3 from loosening.

Claims

1. An elastic insulator, comprising an insulating core rod (1), wherein a clamp body (2) and a fitting (3) are respectively disposed at both ends of the insulating core rod (1), characterized in that: The clamp body (2) includes a cylindrical body (2-1) for accommodating an insulating core rod (1) and a clamp assembly (2-2) for clamping a conductor. An anti-detachment head (1-1) is provided at the end of the insulating core rod (1). A constriction (2-3) is provided at the end of the cylindrical body (2-1) where the insulating core rod (1) is inserted or extended, which can lock the anti-detachment head (1-1) from the inside of the cylindrical body (2-1). An elastic insulator (4) is filled between the insulating core rod (1) and the cylindrical body (2-1). A skirt (5) structure for increasing the creepage distance is provided outside the insulating core rod (1) and the cylindrical body (2-1). A waist (1-3) is provided at the part of the insulating core rod (1) placed inside the cylindrical body (2-1), which is tightened inward in the middle so that the middle dimension is smaller than the dimensions at both ends. The anti-detachment head (1-1) is provided at the bottom end of the waist (1-3).

2. The elastic insulator according to claim 1, characterized in that: The anti-detachment head (1-1) and the insulating core rod (1) are an integral unit. The anti-detachment head (1-1) is provided with an external thread, and the constriction (2-3) is provided with an internal thread. The anti-detachment head (1-1) can be fed into the cylinder (2-1) by turning the thread. If the anti-detachment head (1-1) does not rotate when the insulating core rod (1) is pulled out from the cylinder (2-1), it cannot be pulled out.

3. The elastic insulator according to claim 1, characterized in that: The outer circumference of the anti-detachment head (1-1) is larger than the inner hole size of the constriction (2-3), and the bottom of the clamp body (2) is provided with an opening (2-4) communicating with the cylinder (2-1); the insulating core rod (1) is inserted from the opening (2-4) and then extends from one end of the constriction (2-3).

4. The elastic insulator according to claim 3, characterized in that: The anti-detachment head (1-1) is detachable and can be inserted into the cylinder (2-1) from the opening (2-4).

5. An elastic insulator, comprising an insulating core rod (1), wherein a clamp body (2) and a fitting (3) are respectively provided at both ends of the insulating core rod (1), characterized in that: The clamp body (2) includes a cylindrical body (2-1) for accommodating an insulating core rod (1) and a clamp assembly (2-2) for clamping a conductor. An anti-detachment head (1-1) is provided at the end of the insulating core rod (1). A constriction (2-3) is provided at the end of the cylindrical body (2-1) where the insulating core rod (1) can be inserted or extended, which can lock the anti-detachment head (1-1) from the inside of the cylindrical body (2-1). An elastic insulator (4) is filled between the insulating core rod (1) and the cylindrical body (2-1). A skirt (5) structure for increasing the creepage distance is provided outside the insulating core rod (1) and the cylindrical body (2-1). A toothed flange (1-4) is provided at the part of the insulating core rod (1) placed inside the cylindrical body (2-1). The anti-detachment head (1-1) is provided at the end of the insulating core rod (1) placed inside the cylindrical body (2-1).

6. An elastic insulator according to claim 5, characterized in that: The anti-detachment head (1-1) and the insulating core rod (1) are an integral unit, and the anti-detachment head (1-1) is provided with an elastic buckle (1-2). When the insulating core rod (1) is inserted into the cylinder (2-1), the elastic buckle (1-2) can retract, so that the insulating core rod (1) can smoothly enter the cylinder (2-1). When the insulating core rod (1) is pulled out of the cylinder (2-1), it is blocked by the constriction (2-3) because the elastic buckle (1-2) cannot retract.

7. An elastic insulator according to any one of claims 1 to 6, characterized in that: The elastic insulator (4) is made of rubber, thermoplastic polyester elastomer, polyolefin elastomer or polyurethane, and the umbrella skirt (5) is made of low hardness natural rubber, polyurethane rubber or silicone rubber.

8. An elastic insulator according to any one of claims 1 to 6, characterized in that: An annular groove (1-5) is provided at the part of the insulating core rod (1) that contacts the umbrella skirt (5).

9. An elastic insulator according to any one of claims 1 to 6, characterized in that: The fitting (3) is a screw connected to the insulating core rod (1) by a thread, and a locking nut (6) is also provided on the fitting (3).

10. An elastic insulator according to any one of claims 1 to 6, characterized in that: The clamp body (2) also includes a pair of clamping plates (2-5) and a base plate (2-6) connected to the cylinder (2-1). The clamping plates (2-5) are clamped and fixed to the base plate (2-6) by bolt connection.

11. An elastic insulator according to any one of claims 1 to 6, characterized in that: The clamp body (2) further includes a pair of clamping plates (2-5) and a base plate (2-6) connected to the cylinder (2-1). The clamping plates (2-5) are respectively fixed to the base plate (2-6) by bolts.

12. An elastic insulator according to claim 10, characterized in that: The clamping plate (2-5) is provided with a conductive pad (2-7) that contacts the conductor.

13. An elastic insulator according to claim 11, characterized in that: The clamping plate (2-5) is provided with a conductive pad (2-7) that contacts the conductor.

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