Heat shrink tube mold and pouring sleeve thereof

Abstract

The utility model relates to the field of casing pipe pouring moulds, in particular to a heat shrink tube mould and a pouring casing pipe thereof, which comprise a heat shrink tube, the heat shrink tube is a hollow cylinder, pouring moulds are respectively arranged at two end parts of the heat shrink tube, the inner side end surfaces of the pouring moulds are close to the end surface of the heat shrink tube and are connected with the heat shrink tube, the pouring moulds are disc-shaped, and the inner side end surfaces of the pouring moulds are connected with the heat shrink tube. A through hole for a bus conductor to penetrate through is formed in the center of the pouring mold, an axially-through pouring hole is formed in the pouring mold located on the periphery of the through hole, a pouring nozzle is installed in the pouring hole, and the pouring mold is connected with a resin pouring pipe through the pouring nozzle. The surface of the outer diameter of the heat shrink tube is wrapped with an insulating cloth tape, the insulating cloth tape completely covers the outer wall of the whole heat shrink tube, and the outer part of the insulating cloth tape close to the position of the casting mold is locked through a locking piece; according to the scheme, a heat shrink tube is adopted as a mold, various sleeves are poured with epoxy resin, a traditional steel mold is replaced for product pouring, the tedious mold loading and unloading process is omitted, the sleeve pouring problem is solved, the mold opening investment is reduced, and the economic cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to bushing casting mould field, concretely relates to a heat shrink tube mould and its bushing. BACKGROUND

[0002] Capacitive bushing products are usually made by casting, the tool for casting is a mould, and epoxy resin is used for casting. Traditional steel mould casting products have a series of problems such as high cost, high cost of maintenance, stress concentration during demoulding, product cracking and waste, and a simple and convenient substitute needs to be sought. UTILITY MODEL CONTENT

[0003] In view of the technical problems existing in the steel mould casting products, the utility model aims to provide a heat shrink tube mould and its bushing, which uses a disposable heat shrink tube as a mould to replace traditional steel mould casting products and save the complicated mould mounting and demoulding process; and has the characteristics of economy, simplicity, safety and high efficiency.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a heat shrink tube mould, which comprises: a heat shrink tube, which is a hollow cylinder, two ends of the heat shrink tube are respectively provided with a casting mould, an inner side surface of the casting mould is close to an end surface of the heat shrink tube and is connected with the heat shrink tube, the casting mould is disc-shaped, a through hole for a bus conductor is arranged at a center position of the casting mould, an axial through casting hole is arranged at a position outside the through hole of the casting mould, a casting nozzle is arranged in the casting hole, and a resin casting pipe is connected with the casting nozzle; an insulating cloth tape is wrapped around an outer diameter surface of the heat shrink tube, the insulating cloth tape completely covers the outer wall of the heat shrink tube, and the insulating cloth tape outside the position close to the casting mould is locked by a locking piece.

[0005] Further, an annular groove is arranged in the inner diameter of the casting mould, and a sealing ring is arranged in the annular groove to form a seal between the conductor and the casting mould during casting;

[0006] Further, the contact part between the outer diameter of the casting mould and the heat shrink tube is coated with glue to prevent resin leakage during casting;

[0007] Further, the locking piece is a circular metal clip, the metal clip is provided with a metal buckle, and the metal clip is wrapped around the outside of the insulating cloth tape and is clamped by the metal buckle during use.

[0008] One end of the resin casting pipe is connected to the mould through the casting nozzle of the casting mould, and the other end of the resin casting pipe is connected to a resin storage tank.

[0009] Further, the number of the casting nozzles arranged on the casting mould is four and is uniformly distributed.

[0010] Based on the above structure of the mold, the conductor is placed in the heat shrink tube, the two ends of the conductor extend to the outside of the heat shrink tube and the two ends of the heat shrink tube are installed with the pouring mold, and the end of the conductor passes through the through hole in the center of the pouring mold, the pouring space is formed by the heat shrink tube, the two pouring molds and the conductor, and the epoxy resin is poured into the pouring space through the pouring nozzle of the pouring mold.

[0011] Further, in order to ensure the stability of the pouring mold during pouring, a nut is arranged outside the pouring mold, the nut is screw-connected with the conductor, and the inner end face of the nut abuts against the outer end face of the pouring mold.

[0012] The pouring sleeve completed by using the heat shrink tube mold structure includes a core body, the core body is composed of a conductor in the middle and an insulation layer outside the conductor.

[0013] In the heat shrink tube mold, a disposable heat shrink tube is used as the mold; after the pouring sleeve product is formed by using the heat shrink tube mold, the heat shrink tube needs to be turned off, and the heat shrink tube is only used in the pouring process.

[0014] The heat shrink tube mold has the advantages that:

[0015] The heat shrink tube is used as the mold, various sleeves are poured by using the epoxy resin, the traditional steel mold pouring product is replaced, the complicated demolding process is omitted, the sleeve pouring problem is solved, the mold opening investment is reduced, the economic cost is reduced, and the heat shrink tube is applied to the capacitor sleeve with similar structures such as a transformer / air connection sleeve, a transformer / closed bus connection large-current sleeve, a transformer / GIS connection sleeve, a transformer / cable box connection sleeve and a wall-penetrating sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The heat shrink tube mold is used for pouring the sleeve.

[0017] Figure 2 The heat shrink tube mold is used for pouring the sleeve.

[0018] Figure 3 The heat shrink tube mold is used for pouring the sleeve. Figure 1 The heat shrink tube mold is used for pouring the sleeve.

[0019] In the figure, 1 is a heat shrink tube, 2 is a pouring mold, 3 is a pouring nozzle, 4 is an insulation tape, 5 is a sealing ring, 6 is a metal buckle, 7 is a nut, 8 is a conductor, and 9 is an insulation layer. DETAILED DESCRIPTION

[0020] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] like Figures 1-3 The heat shrink tubing mold shown includes: a heat shrink tubing 1, which is a hollow cylinder. A casting mold 2 is installed at each of the two ends of the heat shrink tubing 1. The inner end face of the casting mold 2 is close to and connected to the end face of the heat shrink tubing 1. The casting mold 2 is disc-shaped. A through hole for a busbar conductor 8 is opened at the center of the casting mold 2. An axially penetrating casting hole is opened at the periphery of the through hole. A casting nozzle 3 is installed in the casting hole, and a resin casting tube is connected through the casting nozzle 3. An insulating tape 4 is wrapped around the outer diameter surface of the heat shrink tubing 1, completely covering the entire outer wall of the heat shrink tubing 1. The insulating tape 4 near the casting mold 2 is locked by a locking device.

[0022] The inner diameter of the casting mold 2 is provided with an annular groove, and a sealing ring 5 is provided in the annular groove to form a seal between the mold and the conductor 8 during the casting process.

[0023] Furthermore, the part of the outer diameter of the casting mold 2 that contacts the heat shrink tubing 1 is coated with adhesive to prevent resin leakage during the casting process;

[0024] Furthermore, the locking component is a circular metal clip with a metal buckle 6. In use, the metal clip is wrapped around the outside of the insulating tape 4 and secured by the metal buckle 6.

[0025] The metal clip can be made using a structure known in the existing technology;

[0026] One end of the resin casting pipe is connected to the mold through the casting nozzle 3 of the casting mold 2, and the other end of the resin casting pipe is connected to the resin storage tank.

[0027] Furthermore, the number of pouring nozzles 3 on the casting mold 2 is set to 4 and evenly distributed to ensure uniform resin pouring inside the mold.

[0028] Based on the above-described mold structure, the conductor 8 is placed in the heat shrink tubing 1, with both ends of the conductor 8 extending to the outside of the heat shrink tubing 1 and the two ends of the heat shrink tubing 1 being fitted with the casting mold 2. At the same time, the end of the conductor 8 passes through the through hole in the center of the casting mold 2. The above-described casting space is formed by the heat shrink tubing 1, the two casting molds 2, and the conductor 8. Epoxy resin is injected into the casting space through the casting nozzle 3 of the casting mold 2.

[0029] Further, in order to ensure the stability of the pouring mold 2 during pouring, a nut 7 is arranged outside the pouring mold 2, the nut 7 is screw-connected with the conductor 8, and the inner end surface of the nut 7 abuts against the outer end surface of the pouring mold 2.

[0030] The pouring sleeve completed by adopting the heat shrinkable tube mold structure comprises a core body, the core body is a conductor 8 in the middle and an insulating layer 9 outside the conductor.

[0031] In the heat shrinkable tube mold, the heat shrinkable tube 1 is used as a mold; the heat shrinkable tube 1 needs to be turned off after the pouring mold 2 is completed, the heat shrinkable tube 1 is only used in the pouring process; after the pouring of the sleeve is completed, the nut 7 outside the pouring mold 2 needs to be loosened, the insulating cloth tape 4 is taken off by unfastening the metal clip, then the heat shrinkable tube 1 is turned off by turning, and finally the sleeve product is formed;

[0032] The mold is replaced by the traditional pouring steel mold by the cooperation of the heat shrinkable tube 1, the insulating cloth tape 4, the pouring mold 5 and the metal clip, the sleeve pouring problem is solved, and the mold opening investment is reduced.

[0033] The heat shrinkable tube is used to replace the steel mold to pour the products: the 145kV wall bushing with a total length of 3.5m and the 145kV transformer / air connection sleeve with a total length of 2.45m; the heat shrinkable tube is used as the mold, the steel mold and the special demolding equipment are not needed, the risk of product scrapping due to demolding failure does not exist, the insulating cloth tape and the heat shrinkable tube are low in cost, and the cost investment is greatly reduced.

[0034] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0035] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0036] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise clearly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

Claims

1. A heat shrink tube mold characterized by, It includes: The heat shrink tube is an internal hollow cylinder, and two ends of the heat shrink tube are respectively provided with pouring molds. The inner side end surface of the pouring mold is close to the end surface of the heat shrink tube and connected with the heat shrink tube. The pouring mold is disc-shaped, and a through hole for the bus conductor to pass through is arranged at the center position of the pouring mold. The pouring mold at the peripheral position of the through hole is provided with an axial through pouring hole, and a pouring nozzle is arranged in the pouring hole. The pouring nozzle is connected with a resin pouring pipe; the outer diameter surface of the heat shrink tube is wrapped with an insulating cloth tape, the insulating cloth tape completely covers the outer wall of the heat shrink tube, and the outer part of the insulating cloth tape close to the pouring mold is locked by a locking piece.

2. A heat shrink tube mold according to claim 1, characterized by: An annular groove is arranged in the inner diameter of the pouring mold, and a sealing ring is arranged in the annular groove.

3. A heat shrink tube mold according to claim 1, wherein: The contact part between the outer diameter of the pouring mold and the heat shrink tube is coated with glue.

4. A heat shrink tube mold according to claim 1, characterized by: The locking piece is a circular ring-shaped metal clip, and the metal clip is provided with a metal buckle. In use, the metal clip is wound outside the insulating cloth tape and is clamped by the metal buckle.

5. A heat shrink tube mold according to claim 1, wherein: One end of the resin pouring pipe is connected to the mold through the pouring nozzle of the pouring mold, and the other end of the resin pouring pipe is connected to a resin storage tank.

6. A heat shrink tube mold according to claim 1, wherein: The number of pouring nozzles arranged on the pouring mold is set to four and is uniformly distributed.

7. A heat shrink tube mold according to claim 1, wherein: The heat shrink tube, the two pouring molds and the conductor form a pouring space.

8. A heat shrink tube mold according to claim 1, characterized by: A nut is arranged outside the pouring mold, and the nut is screw-connected with the conductor, so that the inner side end surface of the nut is close to the outer side end surface of the pouring mold.

9. A bushing cast using the heat shrink tube mold according to any one of claims 1 to 8, characterized by, It includes: The core body is an insulating layer outside the conductor.

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