Pre-tightening type totally-enclosed electric heating melting plug

Abstract

The utility model discloses a pre-tightening type fully-closed electric heating melting plug which comprises a plug body and a sealing cover, the sealing cover is arranged on the upper portion of the plug body, a slidable traction rope is installed in the plug body, the traction rope penetrates through the plug body and is provided with a pre-tightening cone, the pre-tightening cone is located below the plug body, and an inner groove matched with the pre-tightening cone is formed in the bottom face of the plug body. A first electric heating wire is installed on the outer wall of the plug body, and a second electric heating wire corresponding to the pre-tightening cone is installed on the inner wall of the inner groove. The utility model has the beneficial effects that the pre-tightening cone is firmly attached to the inner wall of the inner groove by lifting the traction rope, meanwhile, the pre-tightening cone applies an outward force to the plug body to enable the outer wall of the plug body to be attached to the polyethylene outer layer, and then the inner groove and the pre-tightening cone which are attached to each other as well as the plug body and the polyethylene outer layer which are attached to each other are fused with each other through heating of the first electric heating wire and the second electric heating wire; therefore, the sealing effect on the polyethylene outer layer injection hole is effectively improved, the polyurethane inner layer is prevented from being in long-time contact with external air to be aged, and the service life of the heat distribution pipeline heat preservation layer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline insulation layer sealing, in particular to a pre-tightened fully enclosed electric thermal melting plug. Background Art

[0002] The heat pipe network is also called the heat pipe. It is a heat pipe that starts from the boiler room, direct-fired machine room, heating center, etc. and goes from the heat source to the heat entrance of the building. Multiple heat pipes form a pipe network. The design pressure of the hot water medium for heating is less than or equal to 2.5MPa, and the design temperature is less than or equal to 200℃; the design pressure of the steam medium for heating is less than or equal to 1.6MPa, and the design temperature is less than or equal to 350℃. The design of the process systems such as pipelines, relay pump stations and heat stations for the new construction, expansion or reconstruction of the urban heat pipe network. The design of the urban heat pipe network should meet the requirements of urban planning, be technologically advanced, economically reasonable, safe and applicable, and pay attention to aesthetics.

[0003] The thermal insulation layer of a thermal pipeline is generally composed of a polyethylene outer layer and a polyurethane inner layer. During the installation and construction process, the polyethylene outer tube is first sleeved on the thermal pipeline, and then polyurethane is injected into the space between the polyethylene outer tube and the thermal pipeline through the injection hole of the polyethylene outer tube to form an insulation layer. Finally, the injection hole of the polyethylene outer tube is sealed. During the sealing process of some existing polyethylene outer tube through holes, a sealing plug is directly inserted into the injection hole of the polyethylene outer tube to seal it, resulting in poor sealing between the sealing plug and the injection hole of the polyethylene outer tube, thereby causing poor air tightness of the thermal insulation layer of the thermal pipeline, causing the polyurethane inner layer to age due to long-term contact with the external air, thereby reducing the service life of the thermal insulation layer of the thermal pipeline. Utility Model Content

[0004] The utility model aims to overcome the disadvantages that the through holes of some existing polyethylene outer tubes are mainly sealed by directly inserting the sealing plug into the injection hole of the polyethylene outer tube, resulting in poor sealing between the sealing plug and the injection hole of the polyethylene outer tube, which causes poor air tightness of the thermal insulation layer of the thermal pipeline, causes the polyurethane inner layer to age due to long-term contact with the external air, and reduces the service life of the thermal insulation layer of the thermal pipeline, and provides a pre-tightened fully enclosed electric thermal melting plug.

[0005] The purpose of the utility model is achieved through the following technical solutions: a pre-tightened fully enclosed electric thermal melting plug, comprising a plug body and a sealed cover, the sealed cover is arranged on the upper part of the plug body, a slidable traction rope is installed in the plug body, the traction rope passes through the plug body and is installed with a pre-tightening cone, the pre-tightening cone is located below the plug body, an inner groove adapted to the pre-tightening cone is provided on the bottom surface of the plug body, a first electric heating wire is installed on the outer wall of the plug body, a second electric heating wire corresponding to the pre-tightening cone is installed on the inner wall of the inner groove, the pre-tightening cone and the inner wall of the inner groove are firmly pressed together by lifting the traction rope, and at the same time, the pre-tightening cone applies an outward force to the plug body to press the outer wall of the plug body and the outer layer of polyethylene together, and then the inner groove and pre-tightening cone, which are pressed together, and the plug body and the outer layer of polyethylene are heated by the first and second electric heating wires to fuse each other, thereby effectively improving the sealing effect of the injection hole of the outer layer of polyethylene, avoiding the aging of the inner layer of polyurethane in long-term contact with the external air, and improving the service life of the thermal insulation layer of the thermal pipeline.

[0006] A further technical solution is that the pre-tightening cone is set to be narrow at the top and wide at the bottom. By setting the pre-tightening cone to be narrow at the top and wide at the bottom, the pre-tightening cone can better exert force on the inner wall of the inner groove, thereby ensuring the tightness of the pre-tightening cone and the inner groove, the plug body and the polyethylene outer layer, so that the first heating wire and the second heating wire can better fuse the pre-tightening cone and the inner groove, the plug body and the polyethylene outer layer.

[0007] A further technical solution is that a third heating wire is installed on the bottom surface of the sealed cover. The third heating wire can fuse the contact surface between the sealed cover and the polyethylene outer layer, thereby improving the sealing effect of the sealed cover.

[0008] A further technical solution is that a hollow groove is opened on the top of the sealed cover, a pre-tightening ring is arranged in the hollow groove, and the pre-tightening ring is connected to the top of the traction rope. By providing the pre-tightening ring, it is convenient to apply traction force to the traction rope, thereby improving the convenience of operation.

[0009] A further technical solution is that a clamping block is installed between the pre-tightening ring and the traction rope, and the traction rope can be prevented from retreating into the plug body by setting the clamping block.

[0010] A further technical solution is that the plug body, the sealing cover and the pre-tightening cone are all made of polyethylene.

[0011] The utility model has the following advantages: the utility model lifts the traction rope to firmly press the pre-tightening cone and the inner wall of the inner groove, and at the same time, the pre-tightening cone applies an outward force to the plug body to press the outer wall of the plug body and the outer layer of polyethylene, and then heats the inner groove and the pre-tightening cone, the plug body and the outer layer of polyethylene that are pressed against each other through the first heating wire and the second heating wire, so that the inner groove and the pre-tightening cone, the plug body and the outer layer of polyethylene that are pressed against each other are fused to each other, thereby effectively improving the sealing effect of the injection hole of the polyethylene outer layer, avoiding aging of the polyurethane inner layer due to long-term contact with the external air, and improving the service life of the thermal insulation layer of the thermal pipeline, and by setting the pre-tightening cone to be narrow at the top and wide at the bottom, the pre-tightening cone can better apply a force to the inner wall of the inner groove, ensuring the tightness of the pre-tightening cone, the inner groove, the plug body and the outer layer of polyethylene, so that the first heating wire and the second heating wire can better fuse the pre-tightening cone, the inner groove, the plug body and the outer layer of polyethylene. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0013] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 3 This is a schematic diagram of the installation state of the utility model;

[0015] In the figure, 1. plug body; 2. sealing cover; 3. inner groove; 4. pre-tightening cone; 5. pre-tightening ring; 6. traction rope; 7. first heating wire; 8. second heating wire; 9. third heating wire; 10. block; 11. polyethylene outer layer; 12. polyurethane inner layer; 13. thermal pipeline. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1~Figure 3As shown, a pre-tightened fully enclosed electric thermal melting plug, a pre-tightened fully enclosed electric thermal melting plug, comprises a plug body 1 and a sealed cover 2, the sealed cover 2 is arranged on the upper part of the plug body 1, a slidable traction rope 6 is installed in the plug body 1, the traction rope 6 passes through the plug body 1 and is installed with a pre-tightening cone 4, the pre-tightening cone 4 is located below the plug body 1, the bottom surface of the plug body 1 is provided with an inner groove 3 adapted to the pre-tightening cone 4, the outer wall of the plug body 1 is installed with a first electric heating wire 7, the inner wall of the inner groove 3 is installed with a second electric heating wire 8 corresponding to the pre-tightening cone 4, and the pre-tightening cone 4 is moved by lifting the traction rope 6. The tightening cone 4 and the inner wall of the inner groove 3 are firmly attached, and at the same time, the pre-tightening cone 4 applies an outward force to the plug body 1 to make the outer wall of the plug body 1 and the polyethylene outer layer 11 close to each other, and then the inner groove 3 and the pre-tightening cone 4, the plug body 1 and the polyethylene outer layer 11 that are in close contact with each other are heated by the first heating wire 7 and the second heating wire 8 to fuse with each other, thereby effectively improving the sealing effect of the injection hole of the polyethylene outer layer 11, avoiding the aging of the polyurethane inner layer 12 in long-term contact with the external air, and improving the service life of the thermal insulation layer of the thermal pipeline. The pre-tightening cone 4 is narrow at the top and wide at the bottom. By setting the pre-tightening cone 4, the plug body 1 and the polyethylene outer layer 11 are sealed. The tightening cone 4 is narrow at the top and wide at the bottom, so that the pre-tightening cone 4 can better exert a force on the inner wall of the inner groove 3, ensuring the tightness of the pre-tightening cone 4 and the inner groove 3, the plug body 1 and the polyethylene outer layer 11, so that the first heating wire 7 and the second heating wire 8 can make the pre-tightening cone 4 and the inner groove 3, the plug body 1 and the polyethylene outer layer 11 better fused, and the bottom surface of the sealed cover 2 is installed with a third heating wire 9. The third heating wire 9 can make the contact surface of the sealed cover 2 and the polyethylene outer layer 11 fuse, thereby improving the sealing effect of the sealed cover 2. The top of the sealed cover 2 is opened There is an empty groove, in which a pre-tightening ring 5 is arranged. The pre-tightening ring 5 is connected to the top of the traction rope 6. The pre-tightening ring 5 is arranged to facilitate the application of traction force on the traction rope 6, thereby improving the convenience of operation. A clamping block 10 is installed between the pre-tightening ring 5 and the traction rope 6. The clamping block 10 can prevent the traction rope 6 from retreating into the plug body 1. The plug body 1, the sealed cover 2 and the pre-tightening cone 4 are all made of polyethylene. The plug body 1, the sealed cover 2 and the pre-tightening cone 4 are all made of polyethylene, which can better combine with the polyethylene outer layer 11 to ensure sealing.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-tightened fully enclosed electric thermal melting plug, comprising a plug body (1) and a sealed cover (2), wherein the sealed cover (2) is arranged on the upper part of the plug body (1), characterized in that: A slidable traction rope (6) is installed in the plug body (1), the traction rope (6) passes through the plug body (1) and is installed with a pre-tightening cone (4), the pre-tightening cone (4) is located below the plug body (1), the bottom surface of the plug body (1) is provided with an inner groove (3) adapted to the pre-tightening cone (4), the outer wall of the plug body (1) is installed with a first heating wire (7), and the inner wall of the inner groove (3) is installed with a second heating wire (8) corresponding to the pre-tightening cone (4).

2. A pre-tightened fully enclosed electric thermal melting plug according to claim 1, characterized in that: The preload cone (4) is narrow at the top and wide at the bottom.

3. The pre-tightened fully enclosed electric thermal melting plug according to claim 1, characterized in that: A third heating wire (9) is installed on the bottom surface of the sealed cover (2).

4. The pre-tightened fully enclosed electric thermal melting plug according to claim 1, characterized in that: The top of the sealing cover (2) is provided with an empty slot, a pre-tightening ring (5) is arranged in the empty slot, and the pre-tightening ring (5) is connected to the top end of the traction rope (6).

5. A pre-tightened fully enclosed electric thermal melting plug according to claim 4, characterized in that: A clamping block (10) is installed between the pre-tightening ring (5) and the traction rope (6).

6. The pre-tightened fully enclosed electric thermal melting plug according to claim 1, characterized in that: The plug body (1), the sealing cover (2) and the pre-tightening cone (4) are all made of polyethylene.

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