Fixed casting device and casting mold for cable head in cabinet

Abstract

The utility model discloses a fixed casting device and a casting mould for a cable head in a cabinet, which comprises two fixed casting half bodies which are oppositely arranged and are respectively formed by resin casting, the opposite surfaces of the two fixed casting half bodies are respectively arranged as vertical butt joint vertical surfaces, the two butt joint vertical surfaces are correspondingly provided with vertically arranged cable surrounding grooves, and the cable surrounding grooves are respectively provided with a plurality of cable grooves. Half body auxiliary fixing devices are detachably arranged between the two fixed casting half bodies and the high-voltage switch cabinet, and a half body butt joint tensioning device is detachably arranged between the two fixed casting half bodies. According to the utility model, the two fixed casting half bodies are formed by casting through the casting mold, the cable head is fixed by surrounding and wrapping the two fixed casting half bodies, the fixed casting device formed by casting resin is high in corrosion resistance and good in insulation effect and fixing effect on the cable head, the use of metal materials in the cabinet is reduced, and the anti-conductivity performance is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of high voltage switchgear components, and in particular to a fixing casting device for cable heads inside the cabinet, and also to a casting mold for forming the fixing support component. Background Technology

[0002] After the high-voltage cable is laid from the trench to the high-voltage switchgear, it will penetrate the switchgear cabinet and enter the cabinet. Figure 6 As shown, a metal cable support frame 62 is fixedly installed on the inner wall of the high-voltage switchgear 61. Cables are then secured to the cable support frame 62 using metal supports 63 to ensure creepage distance between adjacent cables and improve the stability of the cables laid within the cabinet. However, since both the cable support frame 62 and the metal supports 63 are made of hard, long-lasting metal materials, they are prone to corrosion and conductivity. Furthermore, the sharp edges of the metal materials can easily damage other cables during installation. When the high-voltage switchgear 61 is installed in harsh environments such as chemical plants or high-humidity areas, the drawbacks of easy corrosion and conductivity become even more pronounced and severe. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a fixing casting device for cable heads inside cabinets that has strong corrosion resistance, good insulation effect and cable fixing effect, low metal material usage and higher anti-conductivity performance.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a fixed casting device for cable heads inside a cabinet, fixedly installed inside a high-voltage switchgear, comprising two fixed casting halves respectively cast in resin and arranged opposite to each other. The opposite surfaces of the two fixed casting halves are respectively set as vertical docking surfaces. Vertically arranged cable enclosure grooves are provided on the two docking surfaces. The cable head passes through the space enclosed by the two cable enclosure grooves. A half-body auxiliary fixing device is detachably provided between the two fixed casting halves and the high-voltage switchgear. A half-body docking tensioning device is detachably provided between the two fixed casting halves.

[0005] As a preferred technical solution, each of the fixed casting halves is further provided with a transition boss on its outer periphery. The transition boss is arranged in a stepped manner from bottom to top on the corresponding fixed casting half. The half auxiliary fixing device is provided on the lowest transition boss, and the half docking and tightening device is provided above the highest transition boss.

[0006] As a preferred technical solution, the semi-body auxiliary fixing device includes a semi-body auxiliary fixing hole that passes through the transition boss, a semi-body auxiliary fixing bolt that is detachably assembled with the semi-body auxiliary fixing hole, and the lower end of the semi-body auxiliary fixing bolt extends into the high-voltage switch cabinet.

[0007] As a preferred technical solution, the half-body butt tensioning device is arranged opposite to each other on both sides of the cable enclosure groove.

[0008] As a preferred technical solution, the half-body docking tensioning device includes a half-body docking tensioning hole through which the two fixed cast halves are arranged opposite each other, and a docking tensioning rod is provided through the half-body docking tensioning hole. The two ends of the docking tensioning rod are respectively threaded with docking tensioning sleeves.

[0009] As an improvement to the above technical solution, the outer periphery of the two fixed casting halves is circular after they are joined together.

[0010] This utility model also relates to a casting mold for casting two fixed casting halves in one go, including two hollow and detachably connected half casting mold shells. The opposite ends and bottom ends of the two half casting mold shells are respectively opened. The top end of the half casting mold shell is provided with a mold shell top cover plate forming the top plane of the fixed casting half. The near ends of the two mold shell top cover plates are formed with a clearance recess for the cable head to pass through. Mold shell partition plates are respectively clamped between the two half casting mold shells on both sides of the clearance recess.

[0011] As a preferred technical solution, the outer periphery of the two half-cast mold shells is circular after they are joined together, and transition steps are formed on the two half-cast mold shells from bottom to top.

[0012] As a preferred technical solution, vertical round steel bars are detachably inserted into the transition steps at the lowest layer of the two half-casting mold shells; two horizontal round steel bars are inserted through the two half-casting mold shells, and the two horizontal round steel bars are detachably installed on both sides of the avoidance recess, and both horizontal round steel bars are located above the uppermost transition step.

[0013] As an improvement to the above technical solution, the docking ends of the two half-body casting mold shells are respectively provided with casting locking ears for matching use, the mold shell partition is clamped between the matching casting locking ears, and casting locking components are provided through the casting locking ears and the mold shell partition.

[0014] Due to the adoption of the above technical solution, this utility model has the following beneficial effects: After the cable head is introduced into the high-voltage switchgear, the casting mold is placed around the outer periphery of the cable head, and resin material forming a fixed casting half is injected into the space enclosed by the two casting mold shells and the mold shell partitions. After the resin material has cured for a certain period of time, the casting mold is removed, and two fixed casting half bodies are formed around the outer periphery of the cable head. The fixed casting half bodies are strengthened by the half body auxiliary fixing device, and the two fixed casting half bodies are connected and tightened by the half body docking and tightening device to keep the cable head surrounded and covered. The formed fixed casting device has strong corrosion resistance, good insulation effect and good fixing effect on the cable head, reduces the use of metal materials in the cabinet, and has higher anti-conductivity performance. Attached Figure Description

[0015] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0016] Figure 1 This is a top view of the fixing and casting device for cable heads inside the cabinet according to an embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0018] Figure 3 This is a top view of the casting mold according to an embodiment of the present invention;

[0019] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the BB direction;

[0020] Figure 5 This is a schematic diagram showing the usage status of the fixing and casting device for cable heads inside the cabinet according to an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the fixed state of cable heads inside a high-voltage switchgear in the prior art;

[0022] In the diagram: 1-Cable head; 2-High voltage switchgear; 3-Fixed cast half; 4-Mating face; 5-Cable enclosure groove; 6-Transition boss; 7-Half-body auxiliary fixing hole; 8-Half-body auxiliary fixing bolt; 9-Half-body mating tension hole; 10-Mating tension rod; 11-Mating tension sleeve; 12-Half-body cast mold; 13-Mold top cover plate; 14-Mold partition; 15-Avoidance recess; 16-Transition step; 17-Vertical round steel; 18-Horizontal round steel; 19-Cast locking lug; 20-Cast locking component; 61-High voltage switchgear; 62-Cable support frame; 63-Metal support component. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0024] like Figure 1 , Figure 2 and Figure 5 As shown, the cable head inside the cabinet is fixedly cast using a fixed casting device, which can be installed on the bottom wall of the high-voltage switchgear 2. When the high-voltage cable is laid from the trench to the high-voltage switchgear 2, the cable head 1 passes through the high-voltage switchgear 2 simultaneously, thus fixing, supporting, and protecting the cable head 1. Specifically, it includes two fixed casting halves 3, each cast in resin and arranged opposite to each other. The opposite surfaces of the two fixed casting halves 3 are respectively set as vertical mating surfaces 4, and vertically arranged cable enclosure grooves 5 are provided on the two mating surfaces 4. The cable head 1 passes through the space enclosed by the two cable enclosure grooves 5. After casting, the two fixed casting halves 3 will naturally adhere and fix to the bottom wall of the high-voltage switchgear 2. The resin material used to cast the fixed cast half 3 can be DMC, namely dimethyl carbonate, which is a thermosetting resin material with excellent insulation properties and chemical corrosion resistance. It can replace the currently used metal cable support frames and metal support components, avoiding the reduction of the safety performance of the non-conductive material due to the surface dust deposited during long-term use of metal materials.

[0025] In this embodiment, the outer periphery of the two fixed cast-in-place halves 3 is circular after docking, eliminating sharp edges and facilitating the laying of other power lines and preventing cable scratches. Each fixed cast-in-place half 3 is also provided with a transition protrusion 6 on its outer periphery. The transition protrusions 6 are arranged in a stepped manner from bottom to top on the corresponding fixed cast-in-place half 3. By setting the transition protrusions 6, the outer periphery of the two fixed cast-in-place half 3 becomes stepped after docking, and the overall outer dimensions gradually decrease, which helps to gradually increase the creepage distance and enhance safety.

[0026] Each of the two fixed cast-in-place halves 3 is detachably connected to the high-voltage switchgear 2 by an auxiliary fixing device, and a detachable mating and tightening device is also provided between the two fixed cast-in-place halves 3. The auxiliary fixing devices enhance the fixation of the fixed cast-in-place halves 3 on the high-voltage switchgear 2, and the mating and tightening device enhances the enclosure and fixation of the cable head 1 by the two fixed cast-in-place halves 3. Specifically, the auxiliary fixing device is located on the lowest transition boss 6, and the mating and tightening device is located above the uppermost transition boss 6.

[0027] The semi-body auxiliary fixing device includes a semi-body auxiliary fixing hole 7 that penetrates the transition boss 6, and a semi-body auxiliary fixing bolt 8 that is detachably assembled with the semi-body auxiliary fixing hole 7, with the lower end of the semi-body auxiliary fixing bolt 8 extending into the high-voltage switchgear 2. After the two fixed cast-in-place semi-body 3 are cast, the corresponding fixed cast-in-place semi-body 3 can be firmly and securely fixed in the high-voltage switchgear 2 by means of the cooperation between the semi-body auxiliary fixing bolt 8 and the semi-body auxiliary fixing hole 7.

[0028] The half-body docking tensioning device is arranged opposite to each other on both sides of the cable enclosure groove 5, so as to symmetrically form a tensioning connection between the two fixed cast halves 3 on both sides of the cable head 1, so that the cable head 1 is evenly stressed when it is enclosed. The half-body docking tensioning device includes a half-body docking tensioning hole 9 through which the two fixed cast halves 3 are arranged opposite to each other, and a docking tensioning rod 10 is provided through the half-body docking tensioning hole 9. The two ends of the docking tensioning rod 10 are respectively threaded with docking tensioning sleeves 11. After the two fixed cast halves 3 are cast, the docking tensioning rod 10 is inserted into the corresponding two half-body docking tensioning holes 9, and the two ends are tightened and fixed by the docking tensioning sleeves 11. The operation is simple and convenient. The half-body docking tensioning hole 9 forms a limiting platform to limit the connection of the docking tensioning sleeves 11.

[0029] like Figure 3 and Figure 4As shown, this utility model also relates to a casting mold for casting two fixed casting halves 3 in one go. It includes two hollow and detachably connected half casting mold shells 12. The opposite ends and bottom ends of the two half casting mold shells 12 are respectively opened. The top end of the half casting mold shell 12 is provided with a mold shell top cover plate 13 forming the top plane of the fixed casting half 3. Mold shell partition plates 14 are respectively clamped between the two half casting mold shells 12 on both sides of the avoidance recess 15. The near ends of the two mold shell top cover plates 13 form an avoidance recess 15 for the cable head 1 to pass through. During the casting of the fixed cast half 3, two cast half mold shells 12 are arranged around the outer periphery of the cable head 1, and the mold shell partition 14 is clamped in place. The space formed by the cast half mold shell 12, the inner surface of the high-voltage switchgear 2, the mold shell partition 14, and the cable head 1 constitutes the space for casting the fixed cast half 3. The mold shell partition 14 can be made of 1 mm thick PP plastic sheet. The size of the clearance notch 15 can be adjusted appropriately according to the different diameters of the cable head 1.

[0030] After the two semi-cast mold shells 12 are joined, their outer periphery is circular, and each of the two semi-cast mold shells 12 has a transition step 16 formed from bottom to top. The transition step 16 is used to cast the transition boss 6. In this embodiment, vertical round steel bars 17 are detachably inserted into the transition step 16 at the bottom of the two semi-cast mold shells 12, forming the semi-cast auxiliary fixing hole 7. Two transverse round steel bars 18 are inserted through the two semi-cast mold shells 12. The two transverse round steel bars 18 are detachably set on both sides of the relief recess 15, and both transverse round steel bars 18 are located above the top transition step 16, forming the semi-cast docking tension hole 9. The transverse round steel bars 18 are thin in the middle and thick at both ends to form a limiting platform on the semi-cast docking tension hole 9.

[0031] The two half-body casting mold shells 12 are respectively provided with matching casting locking ears 19 at their mating ends. The mold shell partition 14 is clamped between the matching casting locking ears 19. A casting locking element 20 is provided through the casting locking ears 19 and the mold shell partition 14. The casting locking element 20 can be set as a matching nut and bolt to fix the two half-body casting mold shells 12 around the outer periphery of the cable head 1 and to clamp and fix the mold shell partition 14.

[0032] The forming process of this embodiment is as follows:

[0033] Two semi-integral casting mold shells 12 are arranged around the outer periphery of the cable head 1, and corresponding vertical round steel bars 17 are inserted. Two mold shell partitions 14 are inserted, and two horizontal round steel bars 18 are inserted through the two semi-integral casting mold shells 12, with the horizontal round steel bars 18 passing through the corresponding mold shell partitions 14. The two semi-integral casting mold shells 12 and the mold shell partitions 14 are clamped and fixed by the cooperation of two sets of casting locking parts 20 and casting locking ears 19. Casting material is injected into the gap between the cable head 1 and the relief recess 15. Alternatively, a special material casting hole can be provided on the top cover plate 13 of the mold shell, and the casting material passes through a... After a certain period of curing, the components related to the casting mold are removed. The vertical round steel 17 is removed to form the auxiliary fixing hole 7 of the half body, and the horizontal round steel 18 is removed to form the butt tightening hole 9 of the half body. After the casting material has completely cured, the auxiliary fixing bolt 8 of the half body is inserted into the auxiliary fixing hole 7 of the half body and tightened, so that its bottom end extends into the high voltage switch cabinet 2. The butt tightening rod 10 is inserted into the corresponding butt tightening hole 9 of the half body, and the butt tightening sleeve 11 is screwed into the end of each butt tightening rod 10. The two fixed casting halves 3 formed are then tightened and connected to the outer periphery of the cable head 1.

[0034] The description of this utility model is given for illustrative and descriptive purposes only, and is not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A cable head fixing casting device is fixedly installed inside the high-voltage switchgear, characterized in that: The device includes two fixed cast halves, each cast in resin and arranged opposite to each other. The opposite surfaces of the two fixed cast halves are respectively set as vertical docking surfaces. Vertical cable enclosure grooves are provided on the two docking surfaces. The cable head passes through the space enclosed by the two cable enclosure grooves. The two fixed cast halves are respectively provided with detachable half-body auxiliary fixing devices between them and the high-voltage switchgear. The two fixed cast halves are respectively provided with detachable half-body docking tensioning devices.

2. The fixing and casting device for cable heads inside the cabinet as described in claim 1, characterized in that: Each of the fixed casting halves is provided with a transition boss on its outer periphery. The transition bosses are arranged in a stepped manner from bottom to top on the corresponding fixed casting halves. The half-body auxiliary fixing device is located on the lowest transition boss, and the half-body docking and tightening device is located above the highest transition boss.

3. The fixing and casting device for cable heads inside the cabinet as described in claim 2, characterized in that: The semi-body auxiliary fixing device includes a semi-body auxiliary fixing hole that passes through the transition boss, and a semi-body auxiliary fixing bolt is detachably assembled with the semi-body auxiliary fixing hole, with the lower end of the semi-body auxiliary fixing bolt extending into the high-voltage switch cabinet.

4. The fixing and casting device for cable heads inside the cabinet as described in claim 2, characterized in that: The half-body butt tensioning device is arranged opposite to each other on both sides of the cable enclosure groove.

5. The fixing and casting device for cable heads inside the cabinet as described in claim 4, characterized in that: The half-body docking tensioning device includes a half-body docking tensioning hole through which the two fixed cast halves are arranged opposite each other, and a docking tensioning rod is provided through the half-body docking tensioning hole. The two ends of the docking tensioning rod are respectively threaded with docking tensioning sleeves.

6. The fixing and casting device for cable heads inside the cabinet as described in claim 1, characterized in that: The outer periphery of the two fixed cast halves is circular after they are joined together.

7. A casting mold for casting two fixed casting halves as described in any one of claims 1 to 6 in a single operation, characterized in that: The device includes two hollow and detachably connected semi-casting mold shells. The opposite ends and bottom ends of the two semi-casting mold shells are respectively opened. The top of the semi-casting mold shells is provided with a mold shell top cover plate that forms the top plane of the fixed casting half. The near ends of the two mold shell top cover plates are formed with a clearance recess for the cable head to pass through. Mold shell partition plates are respectively clamped between the two semi-casting mold shells on both sides of the clearance recess.

8. The casting mold as described in claim 7, characterized in that: After the two semi-cast mold shells are joined together, their outer perimeters are circular, and transition steps are formed on the two semi-cast mold shells from bottom to top.

9. The casting mold as described in claim 8, characterized in that: Vertical round steel bars are detachably inserted into the transition steps at the bottom of the two half-casting mold shells; two horizontal round steel bars are inserted through the two half-casting mold shells, and the two horizontal round steel bars are detachably installed on both sides of the avoidance recess, and both horizontal round steel bars are located above the top transition step.

10. The casting mold as described in claim 7, characterized in that: The two half-body casting mold shells are respectively provided with casting locking ears for use. The mold shell partition is clamped between the casting locking ears for use. Casting locking components are provided through the casting locking ears and the mold shell partition.

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