Pre-twisted grounding armor rod, wire mounting structure and railway contact network

Abstract

The utility model provides a pre-twisted grounding armor rod, a lead mounting structure and a railway contact net, and relates to the technical field of electrified railway contact nets. The pre-twisted grounding armor rod comprises at least one first pre-twisted armor rod sheet and at least one second pre-twisted armor rod sheet, and the first pre-twisted armor rod sheet comprises a pre-twisted armor rod section and a grounding lead section which are connected with each other; the pre-twisted armor rod section and the second pre-twisted armor rod sheet are both used for wrapping a wire, and the grounding lead section is used for being electrically connected with a pillar. The preformed armor rod section of the first preformed armor rod sheet and the second preformed armor rod sheet wrap the wire, so that the wire is protected from abrasion, and abrasion caused by vibration and galloping of the wire is reduced. When current passes through the wire, part of the current can be conducted to the supporting column through the grounding lead section and then conducted to a grounding system, the situation that all the current is conducted through the contact face of the pre-twisted grounding armor rod and the fixing piece is avoided, and the situation that the wire is electrically corroded or even ablated is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of catenary for electrified railways, in particular to a preformed earthing protection strip, a conductor installation structure and a railway catenary. Background Technique

[0002] The railway catenary is a special power supply network erected along the railway to provide power for electric locomotives or EMUs. It transmits electric energy to electric locomotives or EMUs through the catenary suspension device, enabling them to operate. As an important part of the railway power supply system, the railway catenary is the main power supply facility in the railway transportation system, and its stability and reliability are directly related to the safety of railway transportation.

[0003] Currently, conductors that do not require pillar insulation (such as overhead ground wires, lightning protection wires, protection wires, etc.) are mostly fixedly connected to the pillar by shoulder mount fasteners, etc. When making the fixed connection, in order to reduce the wear caused by the vibration and dancing of the conductor, a preformed protection strip is mostly installed at the installation and fixing position, and no separate earthing lead is set after installation and fixing. Instead, electrical connection is made through the contact between the conductor and the fixture. When current passes through such a conductor, the conductor conducts the current to the ground through the fixture, the pillar, and the earthing system.

[0004] However, the contact resistance between the conductor and the protection strip and the fixture is relatively large, and electric corrosion will occur when passing a large current, and in severe cases, even wire burning may occur. Content of the Utility Model

[0005] In order to solve the problems existing in the prior art, one of the purposes of the utility model is to provide a preformed earthing protection strip.

[0006] The utility model provides the following technical solutions:

[0007] A preformed earthing protection strip includes at least one first preformed protection strip piece and at least one second preformed protection strip piece. The first preformed protection strip piece includes a preformed protection strip segment and an earthing lead segment connected to each other;

[0008] Both the preformed protection strip segment and the second preformed protection strip piece are used to wrap the conductor, and the earthing lead segment is used to be electrically connected to the pillar.

[0009] As a further optional solution for the preformed earthing protection strip, the preformed earthing protection strip further includes a wiring terminal. One end of the wiring terminal is connected to the end of the earthing lead segment away from the preformed protection strip segment, and the other end of the wiring terminal is used to be electrically connected to the pillar.

[0010] As a further optional solution for the preformed grounding protection strip, the preformed grounding protection strip further includes a connecting bolt, and the connecting bolt is connected to an end of the wiring terminal away from the grounding lead segment, and the connecting bolt is used for electrically connecting with the support post.

[0011] As a further optional solution for the preformed grounding protection strip, the first preformed protection strip piece includes one grounding lead segment, and the grounding lead segment is connected to one end of the preformed protection strip segment along the length direction; or

[0012] The first preformed protection strip piece includes two grounding lead segments, wherein one grounding lead segment is connected to one end of the preformed protection strip segment along the length direction, and the other grounding lead segment is connected to the other end of the preformed protection strip segment along the length direction.

[0013] As a further optional solution for the preformed grounding protection strip, at least two first preformed protection strip pieces are provided. The first preformed protection strip piece includes one grounding lead segment. The grounding lead segment of one first preformed protection strip piece is connected to one end of the preformed protection strip segment along the length direction, and the grounding lead segment of the other first preformed protection strip piece is connected to the other end of the preformed protection strip segment along the length direction.

[0014] As a further optional solution for the preformed grounding protection strip, the number of the first preformed protection strip pieces is one, and the number of the second preformed protection strip pieces is two. One first preformed protection strip piece and two second preformed protection strip pieces are arranged circumferentially along the wire.

[0015] Another object of the present utility model is to provide a wire installation structure.

[0016] The present utility model provides the following technical solutions:

[0017] A wire installation structure includes a wire, a support post, a fixing member and the above-mentioned preformed grounding protection strip;

[0018] The preformed grounding protection strip wraps the wire, and the preformed grounding protection strip and the wire are fixedly arranged on the support post through the fixing member.

[0019] As a further optional solution for the wire installation structure, the grounding lead segment is connected to the support post; or

[0020] The grounding lead segment is connected to the fixing member and is electrically connected to the support post through the fixing member.

[0021] As a further optional solution for the wire installation structure, the fixing member includes an installation portion, a clamping portion, and a connecting portion. The installation portion is connected to the pillar, the clamping portion is disposed opposite to the installation portion, the clamping portion is detachably connected to the installation portion through the connecting portion, and the clamping portion cooperates with the installation portion to clamp and fix the preformed grounding wire protection strip and the wire.

[0022] Another object of the present invention is to provide an overhead catenary system for railways.

[0023] The present invention provides the following technical solutions:

[0024] An overhead catenary system for railways includes the above-mentioned wire installation structure.

[0025] The embodiments of the present invention have the following beneficial effects:

[0026] When fixing the wire, first wind the preformed wire protection strip section of the first preformed wire protection strip and the second preformed wire protection strip around the wire, and then fix the wire together with the preformed grounding wire protection strip wrapped on the wire surface to the pillar through the fixing member. At the same time, the grounding lead section of the first preformed wire protection strip is electrically connected to the pillar. During use, the preformed wire protection strip section of the first preformed wire protection strip and the second preformed wire protection strip wrap the wire to protect the wire from abrasion and reduce the abrasion caused by wire vibration and dancing. When current passes through the wire, part of the current can be conducted to the pillar through the grounding lead section and then to the grounding system, avoiding all the current passing through the contact surface between the preformed grounding wire protection strip and the fixing member, and it is not easy to have the situation of electrical corrosion or even ablation of the wire.

[0027] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given below in conjunction with the accompanying drawings and are described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 Shows a schematic structural diagram of a wire protection strip in the related art;

[0030] Figure 2 Shows a schematic installation diagram of a wire in the related art;

[0031] Figure 3The schematic structural diagram of a pre-twisted grounding wire protection strip provided by an embodiment of the present utility model is shown;

[0032] Figure 4 The schematic structural diagram of a wire installation structure provided by an embodiment of the present utility model is shown.

[0033] Main component symbol description:

[0034] 100` - wire protection strip; 110` - pre-twisted wire protection strip piece;

[0035] 100 - pre-twisted grounding wire protection strip; 110 - first pre-twisted wire protection strip piece; 111 - pre-twisted wire protection strip segment; 112 - grounding lead segment; 120 - second pre-twisted wire protection strip piece; 130 - terminal; 140 - connecting bolt; 200 - wire; 300 - support pillar; 400 - fixing member; 410 - installation part; 420 - clamping part; 430 - connecting part. Detailed implementation manners

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0038] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the description of the template herein are for the purpose of describing specific embodiments only and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] In the related art, as Figure 1 and Figure 2 shown, when fixing the wire 200, first wind three groups of preformed armor rods 110` around the wire 200 in a spiral shape to wrap the wire 200, and then fix the wire 200 together with the armor rod 100` coated on the surface of the wire 200 to the pole 300 along the railway through the fixing member 400. Since both the wire 200 and the armor rod 100` are spiral, their contact with the fixing member 400 is not a surface contact, and the contact resistance is relatively large. When passing a large current, electrical corrosion will occur, and in severe cases, even wire burning may occur.

[0042] Embodiment

[0043] To address the problems existing in the related art, please refer to Figure 3 , this embodiment provides a preformed grounding armor rod 100, which is applied to a wire installation structure. The preformed grounding armor rod 100 includes at least one first preformed armor rod 110 and at least one second preformed armor rod 120, and the first preformed armor rod 110 includes a preformed armor rod section 111 and a grounding lead section 112 that are connected to each other.

[0044] Please refer to Figure 4 , wherein the preformed armor rod section 111 and the second preformed armor rod 120 are both used to wrap the wire 200, and the grounding lead section 112 is used to electrically connect to the pole 300.

[0045] When fixing the wire 200, first wind the preformed protection strip segments 111 of the first preformed protection strip piece 110 and the second preformed protection strip piece 120 around the wire 200, and then fix the wire 200 and the preformed grounding protection strip 100 covering the surface of the wire 200 on the pillar 300 through the fixing member 400. Meanwhile, the grounding lead segment 112 of the first preformed protection strip piece 110 is electrically connected to the pillar 300.

[0046] During use, the preformed protection strip segments 111 of the first preformed protection strip piece 110 and the second preformed protection strip piece 120 wrap the wire 200 to protect the wire 200 from abrasion and reduce the abrasion caused by the vibration and dancing of the wire 200.

[0047] When current passes through the wire 200, part of the current can be conducted to the pillar 300 through the grounding lead segment 112, and then conducted to the grounding system, avoiding all the current passing through the contact surface between the preformed grounding protection strip 100 and the fixing member 400, and it is not easy to have the situation of electrocorrosion or even ablation of the wire 200.

[0048] Specifically, the length of the preformed protection strip segment 111 is equal to the length of the second preformed protection strip piece 120. When the preformed protection strip segment 111 and the second preformed protection strip piece 120 are wound around the wire 200, the two ends of the preformed protection strip segment 111 are flush with the two ends of the second preformed protection strip piece 120 respectively.

[0049] Specifically, when processing the preformed grounding protection strip 100, a preformed protection strip piece with a first preset length and a preformed protection strip piece with a second preset length are respectively intercepted, and the first preset length is greater than the second preset length. Among them, the preformed protection strip piece with the second preset length is used as the second preformed protection strip piece 120.

[0050] In addition, the part of the preformed protection strip piece with the first preset length that exceeds the second preset length is further processed and stranded as the grounding lead segment 112, and the remaining part is used as the preformed protection strip segment 111.

[0051] Furthermore, the preformed grounding protection strip 100 further includes a terminal 130. One end of the terminal 130 is connected to the end of the grounding lead segment 112 away from the preformed protection strip segment 111, and the other end of the terminal 130 is used for electrically connecting to the pillar 300.

[0052] Specifically, the terminal 130 is crimped and fixed at the end of the grounding lead segment 112. Compared with the stranded grounding lead segment 112, the terminal 130 is more convenient for electrically connecting to the pillar 300.

[0053] Furthermore, the above-mentioned preformed grounding wire protection strip 100 further includes a connecting bolt 140. The connecting bolt 140 is connected to one end of the wiring terminal 130 away from the grounding lead segment 112, and the connecting bolt 140 is used for electrically connecting with the support column 300.

[0054] Specifically, one end of the wiring terminal 130 away from the grounding lead segment 112 is arranged in a flat shape. The connecting bolt 140 passes through one end of the wiring terminal 130 away from the grounding lead segment 112, and then is in threaded cooperation with structures such as the support column 300, so as to electrically connect the wiring terminal 130 with the support column 300. Or, the connecting bolt 140 passes through one end of the wiring terminal 130 away from the grounding lead segment 112, and passes through structures such as the support column 300, and then a nut is sleeved, so as to electrically connect the wiring terminal 130 with the support column 300.

[0055] In some embodiments, each first preformed protection strip piece 110 only includes one grounding lead segment 112, and the grounding lead segment 112 is connected to one end of the preformed protection strip segment 111 along the length direction.

[0056] Correspondingly, the numbers of the wiring terminal 130 and the connecting bolt 140 are both the same as the number of the first preformed protection strips.

[0057] In some other embodiments, each first preformed protection strip piece 110 includes two grounding lead segments 112. One of the grounding lead segments 112 is connected to one end of the preformed protection strip segment 111 along the length direction, and the other grounding lead segment 112 is connected to the other end of the preformed protection strip segment 111 along the length direction.

[0058] Correspondingly, the numbers of the wiring terminal 130 and the connecting bolt 140 are both twice the number of the first preformed protection strips.

[0059] In still some other embodiments, there are at least two first preformed protection strip pieces 110, and each first preformed protection strip piece 110 only includes one grounding lead segment 112.

[0060] The grounding lead segment 112 of one of the first preformed protection strip pieces 110 is connected to one end of the preformed protection strip segment 111 along the length direction, and the grounding lead segment 112 of the other first preformed protection strip piece 110 is connected to the other end of the preformed protection strip segment 111 along the length direction.

[0061] At this time, grounding lead segments 112 are arranged on both sides of the whole preformed grounding wire protection strip 100 along the length direction.

[0062] In this embodiment, the number of the first preformed wire protection strips 110 is one, and the number of the second preformed wire protection strips 120 is two. One first preformed wire protection strip 110 and two second preformed wire protection strips 120 are arranged along the circumferential direction of the wire 200.

[0063] In other embodiments of the present application, the sum of the number of the first preformed wire protection strips 110 and the second preformed wire protection strips 120 may also be two, four or more. The specific number is determined according to the specifications of the wire 200 and actual requirements, and the present application does not limit this.

[0064] In summary, the above preformed grounding wire protection strip 100 extends the conventional preformed wire protection strip and twists the extended section to form a grounding lead section 112 for electrically connecting with the support 300. It not only retains the function of preventing the wire 200 from being worn, but also can avoid all the current from being conducted through the contact surface between the preformed grounding wire protection strip 100 and the fixing member 400, and it is not easy to have the situation of electric corrosion or even ablation of the wire 200.

[0065] In fact, compared with the contact surface between the preformed grounding wire protection strip 100 and the fixing member 400, the contact surface between the preformed grounding wire protection strip 100 and the wire 200 is much larger. At the same time, the terminal 130 is connected to structures such as the support 300 through the connecting bolt 140, and its contact surface can also be made larger according to requirements. Therefore, when current passes through the wire 200, the current mainly conducts to the grounding system through the grounding lead section 112 and the support 300, and the current at the contact surface between the preformed grounding wire protection strip 100 and the fixing member 400 is small, so it is not easy to have the situation of electric corrosion or even ablation of the wire 200.

[0066] Please refer to Figure 4 , this embodiment further provides a wire installation structure, including a wire 200, a support 300, a fixing member 400 and the above preformed grounding wire protection strip 100.

[0067] Among them, the preformed grounding wire protection strip 100 wraps the wire 200, and the preformed grounding wire protection strip 100 and the wire 200 are fixedly arranged on the support 300 through the fixing member 400.

[0068] In some embodiments, the grounding lead section 112 is directly connected to the support 300 through the terminal 130 and the connecting bolt 140, so as to be electrically connected to the support 300.

[0069] In other embodiments, the grounding lead section 112 is connected to the fixing member 400 through the terminal 130 and the connecting bolt 140, and is electrically connected to the support 300 through the fixing member 400.

[0070] In this embodiment, the fixing member 400 adopts a horizontal support, which includes a mounting portion 410, a clamping portion 420 and a connecting portion 430.

[0071] Among them, the mounting portion 410 is connected to the pillar 300, and the clamping portion 420 is disposed opposite to the mounting portion 410. In addition, the clamping portion 420 is detachably connected to the mounting portion 410 through the connecting portion 430, and the clamping portion 420 cooperates with the mounting portion 410 to clamp and fix the preformed grounding protection strip 100 and the wire 200.

[0072] When installing the wire 200, first place the wire 200 wrapped with the preformed grounding protection strip 100 on the mounting portion 410, then buckle the clamping portion 420 on the wire 200, and then connect the clamping portion 420 to the mounting portion 410 through the connecting portion 430, so as to clamp and fix the preformed grounding protection strip 100 and the wire 200.

[0073] Exemplarily, the connecting portion 430 adopts a bolt. The bolt passes through the clamping portion 420 and the mounting portion 410 from top to bottom and is sleeved with a nut.

[0074] This embodiment also provides a railway catenary, including the above wire installation structure.

[0075] In all the examples shown and described here, any specific value should be construed as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0076] It should be noted that: like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0077] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention.

Claims

1. A preformed earthing protection wire, characterized in that, Comprising at least one first preformed armor rod strip and at least one second preformed armor rod strip, the first preformed armor rod strip comprising a preformed armor rod segment and a grounding lead segment connected to each other; The preformed armor rod segment and the second preformed armor rod strip are both used for wrapping a conductor, and the grounding lead segment is used for electrically connecting to a support.

2. The preformed earthing protection wire according to claim 1, characterized in that, The preformed grounding armor rod further comprises a terminal, one end of the terminal being connected to the end of the grounding lead segment away from the preformed armor rod segment, and the other end of the terminal being used for electrically connecting to the support.

3. The preformed grounding protection wire according to claim 2, characterized in that, The preformed grounding armor rod further comprises a connecting bolt, the connecting bolt being connected to the end of the terminal away from the grounding lead segment, and the connecting bolt being used for electrically connecting to the support.

4. The preformed earthing protection wire according to claim 1, 2 or 3, characterized in that The first preformed armor rod strip comprises one grounding lead segment, and the grounding lead segment is connected to one end of the preformed armor rod segment along the length direction; or The first preformed armor rod strip comprises two grounding lead segments, one of the grounding lead segments being connected to one end of the preformed armor rod segment along the length direction, and the other grounding lead segment being connected to the other end of the preformed armor rod segment along the length direction.

5. The preformed earthing protection strip according to claim 1, 2 or 3, characterized in that, There are at least two first preformed armor rod strips, the first preformed armor rod strip comprises one grounding lead segment, the grounding lead segment of one of the first preformed armor rod strips is connected to one end of the preformed armor rod segment along the length direction, and the grounding lead segment of the other first preformed armor rod strip is connected to the other end of the preformed armor rod segment along the length direction.

6. The preformed grounding protection wire according to claim 1, 2 or 3, characterized in that, The number of the first preformed armor rod strips is one, the number of the second preformed armor rod strips is two, and one first preformed armor rod strip and two second preformed armor rod strips are arranged circumferentially along the conductor.

7. A wire installation structure, characterized in that, Comprising a conductor, a support, a fixing member, and the preformed grounding armor rod according to any one of claims 1-6; The preformed grounding armor rod wraps the conductor, and the preformed grounding armor rod and the conductor are fixedly arranged on the support through the fixing member.

8. The wire installation structure according to claim 7, characterized in that, The grounding lead segment is connected to the support; or The grounding lead segment is connected to the fixing member and is electrically connected to the support through the fixing member.

9. The wire mounting structure according to claim 7, wherein The fixing member comprises a mounting portion, a clamping portion, and a connecting portion, the mounting portion is connected to the support, the clamping portion is arranged opposite to the mounting portion, the clamping portion is detachably connected to the mounting portion through the connecting portion, and the clamping portion cooperates with the mounting portion to clamp and fix the preformed grounding armor rod and the conductor.

10. A railway catenary, characterized in that, Comprising the conductor mounting structure according to claim 7, 8 or 9.

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