Expansion joint of cable bridge

Abstract

The utility model relates to an expansion joint of a cable bridge. The expansion joint comprises a bridging piece, a first guide assembly and a second guide assembly. The first guide assembly comprises a first guide rod and a first connecting unit. Each end of the first guide rod is provided with a first connecting unit. First sliding grooves are formed in the two ends of the first guide rod correspondingly. The first connecting unit comprises a first connecting frame and a first bolt. The first connecting frame is provided with a first limiting groove. The second guide assembly comprises a second guide rod and a second connecting unit. And each end of the second guide rod is provided with a second connecting unit. Second sliding grooves are formed in the two ends of the second guide rod correspondingly. The second connecting unit comprises a second connecting frame and a second bolt. The second connecting frame is provided with a second limiting groove. During installation, an operator screws down the first bolt and the second bolt, operation according to personal experience and feeling is not needed, the unified operation standard and the later bolt loosening risk are low, and the installation reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of cable bridge design, in particular to an expansion joint of a cable bridge. Background Art

[0002] Cable tray is a device used to protect cables, and is commonly used in large offices, industrial workshops, bridges, and public places. When in use, multiple cable trays are connected in series to form a channel for cable routing. Multiple parallel cable trays can also be set up according to different types of cables, such as strong current and weak current, to classify and route the cables. In the installation standard of cable trays, it is clearly required to set expansion joints when installing cable trays. The purpose is that as the ambient temperature changes, the cable tray will expand or contract (especially for metal cable trays). In order to avoid destroying the integrity of the cable tray due to excessive expansion or contraction force, it is necessary to reserve a movable gap at the joint of two adjacent cable trays, and set an expansion joint at the movable gap to bridge the two cable trays together.

[0003] The expansion joint of a traditional cable tray is generally a concave-shaped support plate with strip grooves on both sides. During installation, the support plate is installed on the outside of the lower half of the trough of the cable tray by bolts. At the same time, after the bolts are inserted into the strip grooves, the bolts must not be tightened (that is, the nuts on the bolts cannot be tightened), and loose space needs to be reserved (if the bolts are tightened, the support plate will be completely locked and lose its mobility, and it will not be able to adjust adaptively with the expansion or contraction of the cable tray, so that the two cable trays are fixedly connected as one, resulting in the failure of the movable gap). The disadvantage of this traditional design is that the bolts between the support plate and the trough of the cable tray cannot be tightened, and the tightness depends on the personal experience and feeling of the operator. There is a risk of inconsistent operating standards and loose bolts at a later stage, which reduces the reliability of the installation. Utility Model Content

[0004] Based on this, the utility model provides an expansion joint of a cable tray, which utilizes a bridging member, a first guide assembly, and a second guide assembly to form a bridge-type overlapping structure located between the trough bodies of two cable trays. During installation, the operator tightens the first bolt and the second bolt without having to operate based on personal experience and feeling, thereby improving the uniformity of operating standards, reducing the risk of bolt loosening at a later stage, and improving the reliability of installation.

[0005] An expansion joint of a cable tray, comprising:

[0006] Bridge piece; the bridge piece is used to connect between the trough bodies of two cable trays;

[0007] A first guide assembly for connecting the bridge member; the first guide assembly comprises: a first guide rod connected to one side of the bridge member and a plurality of first connection units connected to the first guide rod; at least one first connection unit is provided at each end of the first guide rod; the first guide rod is arranged along the extension direction of the bridge member; both ends of the first guide rod are respectively provided with first slide grooves arranged along the extension direction of the bridge member; each first connection unit comprises: a first connecting frame and a first bolt; the first connecting frame is provided with a first limiting groove for sliding of the first guide rod; the first bolt is connected to the first connecting frame after passing through the first slide groove; the first connecting frame is used to be connected to the outer side of the slot body of one of the cable trays; and

[0008] A second guide assembly connecting the bridging member; the second guide assembly includes: a second guide rod connected to the other side of the bridging member and a plurality of second connection units connected to the second guide rod; at least one second connection unit is provided at each end of the second guide rod; the second guide rod is arranged along the extension direction of the bridging member; the two ends of the second guide rod are respectively provided with second slide grooves arranged along the extension direction of the bridging member; each second connection unit includes: a second connecting frame and a second bolt; the second connecting frame is provided with a second limiting groove for sliding of the second guide rod; the second bolt is connected to the second connecting frame after passing through the second slide groove; the second connecting frame is used to be connected to the outside of the slot body of another cable tray.

[0009] When the telescopic joint of the cable tray is used, the bridge piece is placed between the slots of the two cable trays, and the first guide assembly and the second guide assembly are respectively installed on the outside of the slots of the cable trays, so as to form a bridge-type overlapping structure. At this time, the first guide rod and the second guide rod are respectively located on the outside of the slot of the cable tray. After the first bolt and the second bolt are passed outward from the inner wall of the slot of the cable tray, they are passed into the first slide groove and the second slide groove, and then tightened on the first connecting frame and the second connecting frame, so that the first connecting frame and the second connecting frame are tightened and fixed on the outside of the slot of the cable tray. The first guide rod can slide in the first limiting groove on the first connecting frame, and the second guide rod can slide in the second limiting groove on the second connecting frame. In addition, the first bolt slides in the first slide groove on the first guide rod, and the second bolt slides in the second slide groove on the second guide rod, so that not only the first guide rod and the second guide rod can be stably installed on the outside of the slot of the cable tray, but also the cable tray and the bridge piece can slide relative to each other. Through the above method, a bridge-type overlapping structure located between the trough bodies of two cable trays is formed by utilizing the bridging member, the first guide assembly, and the second guide assembly. During installation, the operator tightens the first bolt and the second bolt without having to operate based on personal experience and feeling, thereby improving the uniformity of operating standards, reducing the risk of bolt loosening at a later stage, and improving the reliability of installation.

[0010] In one embodiment, the bridge member is a concave-shaped support plate.

[0011] In one embodiment, the bridge member is a U-shaped frame structure, which can provide enclosure protection between two cable trays and improve the protection of the cables.

[0012] In one embodiment, a U-shaped sealing ring is embedded in the inner side of both ends of the bridge member, respectively. The sealing ring is used to improve the sealing between the bridge member and the cable tray, and enhance the protection effect of the cable.

[0013] In one embodiment, the first guide rod and the second guide rod are symmetrically arranged on both sides of the bridge member; and the center points of the first guide rod and the second guide rod coincide with the center points of the sides of the bridge member. The symmetrically distributed structure makes the forces between the components more balanced, which is conducive to extending the service life of the components.

[0014] In one embodiment, the first guide rod and the second guide rod are respectively welded to the outer side of the bridge member.

[0015] In one embodiment, the first guide rod and the second guide rod are detachably connected to the outer side of the bridge member by third bolts. The bolt connection mode is convenient for assembly and disassembly, and is conducive to transportation, inspection and maintenance.

[0016] In one embodiment, the first connecting frame and the second connecting frame are both of an "X"-shaped structure; the first bolt is passed through the central axis of the first connecting frame; the second bolt is passed through the central axis of the second connecting frame. The first connecting frame and the second connecting frame of the "X"-shaped structure can be fixedly connected to the trough body of the cable tray without applying direct pressure to the first guide rod and the second guide rod, thereby ensuring the relative sliding ability between the cable tray and the bridge member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional view of an expansion joint of a cable tray according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A stereoscopic view of the expansion joint of the cable tray shown in another perspective;

[0019] Figure 3 for Figure 1 An exploded view of the expansion joint of the cable tray shown;

[0020] Figure 4 for Figure 1 A half-section view of an expansion joint of a cable tray is shown;

[0021] Figure 5 for Figure 1 The diagram of the expansion joint of the cable tray shown in the figure is in use;

[0022] Figure 6 for Figure 5 The diagram of the expansion joint of the cable tray shown is a partial enlargement of the usage state;

[0023] Figure 7 for Figure 6 A half-section view of the expansion joint of the cable tray shown in the use state;

[0024] Figure 8 for Figure 6 The diagram shown is a schematic diagram of the expansion joint of the cable tray with the bridging parts hidden in the use state.

[0025] The meanings of the symbols in the accompanying drawings are:

[0026] 100-Expansion joint of cable tray;

[0027] 10- bridge piece;

[0028] 20-first guide assembly, 21-first guide rod, 211-first slide slot, 22-first connecting unit, 221-first connecting frame, 2211-first limiting slot, 222-first bolt;

[0029] 30-second guide assembly, 31-second guide rod, 311-second slide slot, 32-second connecting unit, 321-second connecting frame, 3211-second limiting slot, 322-second bolt;

[0030] 40-third bolt;

[0031] 200-Cable tray. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0038] like Figures 1 to 8 As shown, it is an expansion joint 100 of a cable tray according to an embodiment of the utility model.

[0039] like Figure 1 and Figure 2 As shown, the telescopic joint 100 of the cable tray includes: a bridge member 10, a first guide assembly 20 connected to the bridge member 10, and a second guide assembly 30 connected to the bridge member 10. Figures 7 and 8 As shown, when in use, the bridging member 10 is used to be installed between two cable trays 200, and the first guide assembly 20 and the second guide assembly 30 serve as connecting media between the bridging member 10 and the two cable trays 200, and enable relative sliding between the bridging member 10 and the two cable trays 200.

[0040] Below, combined Figures 1 to 8 As shown, the expansion joint 100 of the above-mentioned cable tray is further explained.

[0041] like Figure 6 and Figure 8 As shown, when in use, the bridge member 10 is used to be connected between the trough bodies of two cable trays 200 and is located at the movable gap between the two cable trays 200 .

[0042] like Figure 1 and Figure 6 As shown, in this solution, the bridge member 10 is a U-shaped frame structure. The U-shaped frame structure can provide enclosure protection between the two cable trays 200, thereby improving the protection of the cables.

[0043] Furthermore, a U-shaped sealing ring is respectively embedded in the inner side of both ends of the bridge member 10. The sealing ring is used to improve the sealing between the bridge member 10 and the cable tray 200 and enhance the protection effect on the cable.

[0044] It can be understood that in other embodiments, the bridge member 10 can also be a concave-shaped support plate. When in use, the bridge member 10 is installed in the lower half of the trough body of the cable tray 200.

[0045] like Figure 3 and Figure 4As shown, the first guide assembly 20 includes: a first guide rod 21 connected to one side of the bridge member 10 and a plurality of first connection units 22 connected to the first guide rod 21. At least one first connection unit 22 is provided at each end of the first guide rod 21. The first guide rod 21 is arranged along the extension direction of the bridge member 10. Both ends of the first guide rod 21 are respectively provided with first slide grooves 211 arranged along the extension direction of the bridge member 10. Each first connection unit 22 includes: a first connecting frame 221 and a first bolt 222. The first connecting frame 221 is provided with a first limiting groove 2211 for the first guide rod 21 to slide. The first bolt 222 is connected to the first connecting frame 221 after passing through the first slide groove 211. As shown Figure 7 As shown, the first connecting frame 221 is used to connect to the outer side of the slot of one of the cable trays 200. During installation, the first bolt 222 is inserted outward from the inner side of the slot of the cable tray 200, so that the first bolt 222 is inserted into the first slide groove 211 and then connected to the first connecting frame 221 (tightening the nut).

[0046] like Figure 3 and Figure 4 As shown, the second guide assembly 30 includes: a second guide rod 31 connected to the other side of the bridge member 10 and a plurality of second connection units 32 connected to the second guide rod 31. At least one second connection unit 32 is provided at each end of the second guide rod 31. The second guide rod 31 is arranged along the extension direction of the bridge member 10. Both ends of the second guide rod 31 are respectively provided with second slide grooves 311 arranged along the extension direction of the bridge member 10. Each second connection unit 32 includes: a second connecting frame 321 and a second bolt 322. The second connecting frame 321 is provided with a second limiting groove 3211 for the second guide rod 31 to slide. The second bolt 322 is connected to the second connecting frame 321 after passing through the second slide groove 311. As shown Figure 7 As shown, the second connecting frame 321 is used to connect to the outer side of the slot of another cable tray 200. During installation, the second bolt 322 is inserted outward from the inner side of the slot of the cable tray 200, so that the second bolt 322 is inserted into the second slide groove 311 and then connected to the second connecting frame 321 (tightening the nut).

[0047] like Figure 4 As shown, in this embodiment, a first connecting unit 22 is respectively provided at both ends of the first guide rod 21 , and a second connecting unit 32 is respectively provided at both ends of the second guide rod 31 .

[0048] Furthermore, if Figure 4As shown, in this embodiment, the first guide rod 21 and the second guide rod 31 are symmetrically arranged on both sides of the bridge member 10. The center points of the first guide rod 21 and the second guide rod 31 coincide with the center points of the side surfaces of the bridge member 10. The symmetrically distributed structure makes the forces between the components more balanced, which is conducive to extending the service life of the components.

[0049] In this solution, there are many ways to connect the first guide rod 21 and the second guide rod 31 to the bridge member 10 .

[0050] For example, Figure 3 and Figure 4 As shown, in this embodiment, the first guide rod 21 and the second guide rod 31 are detachably connected to the outer side of the bridge member 10 by third bolts 40. The bolt connection mode is convenient for assembly and disassembly, and is conducive to transportation and overhaul and maintenance.

[0051] For another example, in other embodiments, the first guide rod 21 and the second guide rod 31 may also be welded to the outside of the bridge member 10. In another embodiment, the first guide rod 21 and the second guide rod 31 may also be riveted to the outside of the bridge member 10, respectively.

[0052] Based on the requirements of stable connection and the ability to ensure relative sliding, such as Figure 3 As shown, in this embodiment, the first connecting frame 221 and the second connecting frame 321 are both in an "X" shape. The first bolt 222 is inserted through the center axis of the first connecting frame 221. The second bolt 322 is inserted through the center axis of the second connecting frame 321. The first connecting frame 221 and the second connecting frame 321 in an "X" shape can be fixedly connected to the trough body of the cable tray 200 without applying direct pressure to the first guide rod 21 and the second guide rod 31, thereby ensuring the relative sliding ability between the cable tray 200 and the bridge member 10.

[0053] Brief description of working principle:

[0054] like Figure 6 and Figure 7As shown, when in use, the bridge member 10 is placed between the slots of two cable trays 200, and the first guide assembly 20 and the second guide assembly 30 are respectively installed on the outside of the slots of the cable trays 200, thereby forming a bridge-type overlapping structure. At this time, the first guide rod 21 and the second guide rod 31 are respectively located on the outside of the slots of the cable trays 200. After the first bolt 222 and the second bolt 322 are passed outward from the inner wall of the slot of the cable tray 200, they are passed into the first slide groove 211 and the second slide groove 311, and then tightened on the first connecting frame 221 and the second connecting frame 321, forcing the first connecting frame 221 and the second connecting frame 321 to be tightened and fixed on the outside of the slot of the cable tray 200. The first guide rod 21 can slide in the first limiting groove 2211 on the first connecting frame 221, the second guide rod 31 can slide in the second limiting groove 3211 on the second connecting frame 321, and the first bolt 222 slides in the first sliding groove 211 on the first guide rod 21, and the second bolt 322 slides in the second sliding groove 311 on the second guide rod 31. Not only can the first guide rod 21 and the second guide rod 31 be stably installed on the outside of the groove body of the cable tray 200, but also the cable tray 200 and the bridging member 10 can slide relative to each other.

[0055] In addition, it should be noted that, in the present solution, the bridge member 10 and the cable tray 200 are both made of the same material, for example, both are galvanized sheet metal parts.

[0056] The telescopic joint 100 of the above-mentioned cable tray utilizes a bridging member 10, a first guide assembly 20, and a second guide assembly 30 to form a bridge-type overlapping structure located between the trough bodies of the two cable trays 200. During installation, the operator tightens the first bolt 222 and the second bolt 322 without having to operate based on personal experience and feeling, thereby improving the uniformity of operating standards, reducing the risk of bolt loosening at a later stage, and improving the reliability of installation.

[0057] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An expansion joint of a cable tray, characterized in that: include: Bridge piece; The bridge member is used to connect between the slots of two cable trays; A first guide assembly connected to the bridge member; The first guide assembly comprises: a first guide rod connected to one side of the bridge member and a plurality of first connection units connected to the first guide rod; at least one of the first connection units is provided at each end of the first guide rod; the first guide rod is arranged along the extension direction of the bridge member; both ends of the first guide rod are respectively provided with first slide grooves arranged along the extension direction of the bridge member; each of the first connection units comprises: a first connecting frame and a first bolt; the first connecting frame is provided with a first limiting groove for sliding of the first guide rod; the first bolt is connected to the first connecting frame after passing through the first slide groove; the first connecting frame is used to be connected to the outer side of the slot body of one of the cable trays; and A second guide assembly connected to the bridging member; the second guide assembly includes: a second guide rod connected to the other side of the bridging member and a plurality of second connecting units connected to the second guide rod; at least one second connecting unit is provided at each end of the second guide rod; the second guide rod is arranged along the extension direction of the bridging member; the two ends of the second guide rod are respectively provided with second slide grooves arranged along the extension direction of the bridging member; each of the second connecting units includes: a second connecting frame and a second bolt; the second connecting frame is provided with a second limiting groove for sliding of the second guide rod; the second bolt is connected to the second connecting frame after passing through the second slide groove; the second connecting frame is used to be connected to the outside of the trough body of another cable tray.

2. The expansion joint of the cable tray according to claim 1, characterized in that: The bridge member is a concave-shaped supporting plate.

3. The expansion joint of the cable tray according to claim 1, characterized in that: The bridge member is a U-shaped frame structure.

4. The expansion joint of the cable tray according to claim 3, characterized in that: The inner sides of the two ends of the bridge member are respectively embedded with U-shaped sealing rings.

5. The expansion joint of the cable tray according to claim 1, characterized in that: The first guide rod and the second guide rod are symmetrically arranged on both sides of the bridge member; and the center points of the first guide rod and the second guide rod coincide with the center points of the side surfaces of the bridge member respectively.

6. The expansion joint of the cable tray according to claim 1, characterized in that: The first guide rod and the second guide rod are respectively welded to the outer sides of the bridge member.

7. The expansion joint of the cable tray according to claim 1, characterized in that: The first guide rod and the second guide rod are detachably connected to the outer side of the bridge member through third bolts respectively.

8. The expansion joint of the cable tray according to claim 7, characterized in that: The first connecting frame and the second connecting frame are both of a "X"-shaped structure; the first bolt is passed through the central axis of the first connecting frame; and the second bolt is passed through the central axis of the second connecting frame.

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