A pipe outer sheath heat shrinkage infrared heating furnace

Abstract

This utility model belongs to the field of pipeline protection, specifically relating to a heat-shrinkable infrared heating furnace for pipeline outer sheaths. It includes a pair of semi-circular furnace bodies, which are interlocked to form a tubular structure. The furnace bodies are hinged together by a hinge shaft, and the furnace bodies have the freedom to rotate and open / close around the hinge shaft via the extension and retraction of a telescopic cylinder. Each furnace body includes a pair of end plates, an inner protective net disposed between the two end plates, and an outer cover. The inner protective net and the outer cover are coaxially arranged and fixedly connected to the end plates to form a semi-circular cavity. A set of heating tubes is disposed within the cavity, and the heating tubes are arranged sequentially at intervals around the axis of the tubular structure. The distance between the axis of the tubular structure and each heating tube is equal. The hinge shaft and the heating tubes are parallel to the axial direction of the furnace body. This heating furnace can ensure that the heating temperature of each area of ​​the outer sheath is consistent, improving the protective effect of the outer sheath on the pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline protection, specifically relating to a heat-shrinkable infrared heating furnace for pipeline outer sheaths. Background Technology

[0002] The outer sheath on pipelines typically provides insulation, sealing, and corrosion protection. Installing an outer sheath on the outside of the pipeline provides protection and significantly extends its service life. Currently, the industry standard for securing the outer sheath to pipelines involves manually heating different areas of the sheath with a handheld flame gun, causing it to shrink and adhere to the pipeline. In this traditional method, the heat output of the flame gun relies entirely on the operator's experience, making it difficult to ensure uniform heating across all areas of the sheath. Furthermore, the partial heating of the sheath can lead to incomplete shrinkage and poor fit, affecting the protective effect on the pipeline. On the other hand, the operator's close contact with the open flame and high-temperature pipeline raises safety concerns. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a heat-shrinkable infrared heating furnace for pipe outer sheaths, which can ensure that the heating temperature of each area of ​​the outer sheath is consistent and improve the protective effect of the outer sheath on the pipe.

[0004] The specific technical solution adopted in this utility model is as follows:

[0005] A heat-shrinkable infrared heating furnace for pipe sheaths, the key feature of which is that it includes a pair of semi-circular furnace bodies, which are interlocked to form a tubular structure. The furnace bodies are hinged to each other by a hinge shaft, and the furnace bodies have the freedom to rotate and open and close around the hinge shaft by the extension and retraction of a telescopic cylinder. The furnace body includes a pair of end plates, an inner protective net and an outer cover disposed between the two end plates. The inner protective net and the outer cover are coaxially arranged and fixed to the end plates to form a semi-circular cavity. A set of heating tubes is disposed in the cavity. The heating tubes are arranged sequentially and spaced apart around the axis of the tubular structure. The distance between the axis of the tubular structure and each heating tube is equal. The hinge shaft and the heating tubes are both arranged parallel to the axis of the furnace body.

[0006] A clamping plate is detachably connected to the end plate, and the inner diameter of the clamping plate is smaller than the inner diameter of the end plate.

[0007] The heating tube is an infrared heating lamp tube, and the cavity is also provided with corrugated reflectors that are matched with each infrared heating lamp tube. The corrugated reflectors are fixedly connected to the end plate, and a set of ventilation holes are opened on the outer cover.

[0008] The hinge shaft passes through the end plates at both ends of the furnace body and is hinged to the end plates. Both ends of the furnace body are provided with telescopic cylinders located above the hinge shaft. The two ends of the telescopic cylinders are respectively hinged to the lugs of the end plates of the two furnace bodies.

[0009] The two end plates of the furnace body are fixedly connected by a set of support plates arranged in a ring array. The outer cover is fixedly connected to the support plates by bolts, and the outer cover forms an arc-shaped structure with the support of the support plates.

[0010] The end plate is provided with a set of protruding edges, and the end of the inner protective net is fixed to the protruding edges by bolts.

[0011] The hinge shaft is located on the upper side of the furnace body, and a pair of lifting lugs are provided on the hinge shaft. The furnace body is connected to the lifting equipment by means of the lifting lugs.

[0012] An inlet plate is provided on the lower side of the furnace body. The fixed end of the inlet plate is fixedly connected to one of the furnace bodies, and the inlet end of the inlet plate extends outward toward the other furnace body.

[0013] The end plate is provided with a support leg that extends outward from the lower side, and the bottom surface of the support leg is a horizontal plane.

[0014] The beneficial effects of this utility model are:

[0015] This invention employs a telescopic cylinder to drive the two furnace bodies to open, allowing the heating furnace to be quickly fitted onto the pipeline. The telescopic cylinder then drives the two furnace bodies to close, forming a closed loop around the pipeline. When the heating tube operates, it synchronously and uniformly heats the periphery of the outer sheath on the pipeline, avoiding the temperature differences around the periphery caused by traditional manual, segmented heating. This achieves uniform contraction of the outer sheath, ensuring a good fit between the outer sheath and the pipeline and fully realizing the protective performance of the outer sheath.

[0016] On the other hand, there is no need for manual operation of the flame gun, and operators can maintain a safe distance from the heating furnace during the heating process, which significantly improves safety during operation.

[0017] The end plate is detachably connected with a clamping plate. The diameter of the inner wall of the clamping plate is the same as the diameter of the pipe to be processed. Appropriate clamping plates can be installed on the end plate according to different pipe sizes. The pipe is centered by clamping the pipe with the clamping plate, ensuring that the heating tube and the pipe maintain an equal distance, and further improving the heating uniformity of the outer sheath. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the two furnace bodies of this utility model in a closed state;

[0019] Figure 2 This is a schematic diagram of the two furnace bodies of this utility model in the open state;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model;

[0021] In the attached diagram, 1 is the furnace body, 101 is the end plate, 102 is the protective net, 103 is the outer cover, 104 is the heating tube, 105 is the corrugated reflector, 106 is the support plate, 107 is the raised edge, 2 is the hinge shaft, 3 is the telescopic cylinder, 4 is the lifting lug, 5 is the guide plate, 501 is the guide end, 6 is the support leg, and 7 is the clamping plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] Specific implementation examples Figure 1 , Figure 3 As shown, this utility model relates to a heat-shrinkable infrared heating furnace for pipe outer sheaths, comprising a pair of semi-circular furnace bodies 1, which are interlocked to form a tubular structure. The furnace bodies 1 and the tubular structure are coaxially arranged and are hinged to each other by a hinge shaft 2. The furnace bodies 1 have the freedom to rotate and open / close around the hinge shaft 2 by the extension and retraction of a telescopic cylinder 3, allowing for quick insertion or removal from pipes. It is suitable for on-site pipe laying operations. The furnace body 1 includes a pair of end plates 101, an inner protective net 102 disposed between the two end plates 101, and an outer cover. The body 103, inner protective net 102, and outer cover 103 are coaxially arranged and fixedly connected to end plate 101 to form a cavity. A set of heating tubes 104 are arranged in the cavity. The heating tubes 104 are arranged sequentially and spaced around the axis of the tubular structure. The distance between the axis of the tubular structure and each heating tube 104 is equal. That is, the heating tubes 104 are arranged sequentially and spaced along an arc trajectory. The arc trajectory is coaxial with the tubular structure. An external power supply is connected to the heating tubes 104 in the cavity through an electric wire. The hinge shaft 2 and the heating tubes 104 are both arranged parallel to the axis of the furnace body 1.

[0024] In this embodiment, the telescopic cylinder 3 is a pneumatic cylinder. Preferably, a pneumatic valve for the cylinder is installed on the furnace body 1, and the operator controls the pneumatic valve to adjust the extension and retraction of the cylinder.

[0025] like Figure 2 As shown, the telescopic cylinder 3 drives the two furnace bodies 1 to open, which can quickly cover the heating furnace on the pipeline. The telescopic cylinder 3 drives the two furnace bodies 1 to close, and the heating furnace forms a closed loop around the pipeline. According to the external controller, the heating temperature and heating time of the heating tube 104 are adjusted. The heating tube 104 works to synchronously and uniformly heat the periphery of the outer sheath on the pipeline. This avoids the temperature difference around the periphery of the outer sheath caused by traditional manual heating in different areas. It achieves uniform contraction of the outer sheath, ensures the fit between the outer sheath and the pipeline, and fully realizes the protective performance of the outer sheath.

[0026] On the other hand, there is no need for manual operation of the flame gun, and operators can maintain a safe distance from the heating furnace during the heating process, which significantly improves safety during operation.

[0027] A clamping plate 7 is detachably connected to the end plate 101. Both the inner wall of the end plate 101 and the clamping plate 7 are semi-circular structures. The inner diameter of the clamping plate 7 is smaller than the inner diameter of the end plate 101. The clamping plate 7 is coaxially arranged with the furnace body 1. The diameter of the inner wall of the clamping plate 7 is the same as the diameter of the pipe to be processed. The appropriate clamping plate 7 can be installed on the end plate 101 according to the pipe of different sizes. The pipe is clamped by the clamping plate 7 to achieve the centering of the pipe, ensuring that the heating tube 104 and the pipe maintain an equal distance, and further improving the heating uniformity of the outer sheath.

[0028] The heating tube 104 is an infrared heating lamp tube. The cavity also contains corrugated reflectors 105, each corresponding to a different infrared heating lamp tube. The corrugated reflectors 105 are fixedly connected to the end plate 101. The corrugated reflectors 105 reflect the infrared rays emitted outwards from the heating tube back to the direction of the pipe, reducing heat loss in the heating furnace. Adjacent corrugated reflectors 105 are spaced apart.

[0029] The hinge shaft 2 described above passes through the end plates 101 at both ends of the furnace body 1 and is hinged to the end plates 101. The hinge shaft 2 is located above the outer cover 103. Both ends of the furnace body 1 are provided with telescopic cylinders 3 located above the hinge shaft 2. The two ends of the telescopic cylinders 3 are respectively hinged to the lugs of the end plates 101 of the two furnace bodies 1, thereby improving the stability of the opening and closing process between the furnace bodies 1.

[0030] The two end plates 101 of the furnace body 1 are fixedly connected by a set of support plates 106 arranged in a ring array. The two ends of the support plates 106 are fixedly connected to the two end plates 101 respectively. The outer cover 103 is fixedly connected to the support plates 106 by bolts. The outer cover 103 forms an arc-shaped structure with the support of the support plates 106, which improves the connection stability between the outer cover 103 and the end plates 101.

[0031] The outer cover 103 has ventilation holes. After heating stops, the air can quickly exchange heat through the ventilation holes, which improves the cooling speed of the outer cover and helps to improve the overall operating efficiency.

[0032] A set of protruding edges 107 are provided on the end plate 101. The end of the inner protective net 102 is fixed to the protruding edges 107 by bolts, which improves the connection stability between the inner protective net 102 and the end plate 101, ensures the protective effect of the inner protective net on the heating tube 104, prevents foreign objects from colliding with the heating tube 104, and avoids damage to the heating tube 104.

[0033] The hinge shaft 2 is located on the upper side of the furnace body 1. A pair of lifting lugs 4 are provided on the hinge shaft 2. The furnace body 1 is connected to the lifting equipment through the lifting lugs 4, which makes it easy for the lifting equipment to lift the heating furnace and adjust the height and position of the heating furnace according to the pipeline to meet the on-site operation requirements.

[0034] A guide plate 5 is provided on the lower side of the furnace body 1. The fixed end of the guide plate 5 is fixedly connected to one of the furnace bodies 1, and the guide end 501 of the guide plate 5 extends towards the other furnace body 1 and is inclined outward, that is, the guide end 501 is spaced apart from the other furnace body 1. In this embodiment, the guide plate 5 is installed on... Figure 1 On the left side of the furnace body 1, the fixed end of the guide plate 5 is fixedly connected to the left side of the furnace body 1. During the closing process of the two furnace bodies 1, the right side of the furnace body 1 gradually approaches the left side of the furnace body 1 from the guide end 501. The guide plate 5 gradually contacts the furnace body 1, realizing the gradual guidance and limiting of the right side of the furnace body 1, avoiding the deviation between the two furnace bodies 1, and improving the accuracy of the closing of the two furnace bodies 1.

[0035] A support leg 6 is provided on the lower side of the end plate 101. The bottom surface of the support leg 6 is horizontal. When the heating furnace is not hoisted, it is stably placed on the plane with the help of the support leg 6 to prevent the heating furnace from rolling and colliding.

Claims

1. A heat-shrinkable infrared heating furnace for pipe outer sheaths, characterized in that: The furnace includes a pair of semi-circular furnace bodies (1), which are interlocked to form a tubular structure. The furnace bodies (1) are hinged to each other by means of a hinge shaft (2). The furnace bodies (1) have the freedom to rotate and open and close around the hinge shaft (2) by means of a telescopic cylinder (3). The furnace body (1) includes a pair of end plates (101), an inner protective net (102) and an outer cover (103) disposed between the two end plates (101). The inner protective net (102) and the outer cover (103) are coaxially arranged and fixedly connected to the end plates (101) to form a semi-circular cavity. A set of heating tubes (104) is disposed in the cavity. The heating tubes (104) are arranged sequentially at intervals around the axis of the tubular structure. The distance between the axis of the tubular structure and each heating tube (104) is equal. The hinge shaft (2) and the heating tubes (104) are both arranged parallel to the axis of the furnace body (1).

2. The pipe outer sheath heat shrink infrared heating furnace according to claim 1, characterized in that: A clamping plate (7) is detachably connected to the end plate (101), and the inner diameter of the clamping plate (7) is smaller than the inner diameter of the end plate (101).

3. The pipe outer sheath heat shrink infrared heating furnace according to claim 1, characterized in that: The heating tube (104) is an infrared heating lamp tube, and the cavity is also provided with corrugated reflectors (105) that are matched with each infrared heating lamp tube. The corrugated reflectors (105) are fixedly connected to the end plate (101).

4. The pipe outer sheath heat shrink infrared heating furnace according to claim 1, characterized in that: The hinge shaft (2) passes through the end plates (101) at both ends of the furnace body (1) and is hinged to the end plates (101). Both ends of the furnace body (1) are provided with telescopic cylinders (3) located above the hinge shaft (2). The two ends of the telescopic cylinders (3) are respectively hinged to the lugs of the end plates (101) of the two furnace bodies (1).

5. The pipe outer sheath heat shrink infrared heating furnace according to claim 1, characterized in that: The two end plates (101) of the furnace body (1) are fixedly connected by a set of support plates (106) arranged in a ring array. The outer cover (103) is fixedly connected to the support plates (106) by bolts. The outer cover (103) forms an arc-shaped structure with the support of the support plates (106). A set of ventilation holes are provided on the outer cover (103).

6. The pipe outer sheath heat shrink infrared heating furnace according to claim 5, characterized in that: The end plate (101) is provided with a set of protruding edges (107), and the end of the inner protective net (102) is fixed to the protruding edges (107) by means of bolts.

7. The pipe outer sheath heat shrink infrared heating furnace according to claim 1, characterized in that: The hinge shaft (2) is located on the upper side of the furnace body (1), and a pair of lifting lugs (4) are provided on the hinge shaft (2). The furnace body (1) is connected to the lifting equipment by means of the lifting lugs (4).

8. The pipe outer sheath heat shrink infrared heating furnace according to claim 7, characterized in that: A guide plate (5) is provided on the lower side of the furnace body (1). The fixed end of the guide plate (5) is fixedly connected to one of the furnace bodies (1), and the guide end (501) of the guide plate (5) extends toward the other furnace body (1) and tilts outward.

9. The pipe outer sheath heat shrink infrared heating furnace according to claim 1, characterized in that: The end plate (101) is provided with a support leg (6) extending outward from its lower side, and the bottom surface of the support leg (6) is a horizontal plane.

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