High-density polyethylene winding structure wall pipe B-type pipe forming mold

Abstract

The utility model relates to the technical field of Krah pipe molds, in particular to a high-density polyethylene winding structure wall pipe B-type pipe forming mold which comprises a rack and an air supply pipe, an exhaust fan and a mold are installed on the two sides of the rack respectively, one end of the air supply pipe is connected with the exhaust fan, and the other end of the air supply pipe is connected with a plurality of collecting pipes so as to collect volatile gas released by the mold. In addition, the device further comprises an annular pipe and an annular sliding rail. One side of the annular pipe is connected with an air supply pipe, and the bottom of the annular pipe is connected with a plurality of collecting pipes which are circumferentially arranged along the annular pipe; the annular sliding rail is arranged below the annular pipe, a plurality of sliding blocks in one-to-one correspondence with the collecting pipes are connected into the annular sliding rail in a sliding mode, telescopic rods are connected to the sliding blocks, and the telescopic rods extend inwards in the radial direction of the annular sliding rail and are connected with the collecting pipes. According to the utility model, the problems of small coverage rate and low gas treatment efficiency during collection of volatile gas can be solved.

Description

Technical Field

[0001] This utility model relates to the field of tube mold technology, specifically to a high-density polyethylene spiral wound structure wall tube B-type tube forming mold. Background Technology

[0002] High-density polyethylene (HDPE) type B spiral wound pipe (Krah pipe) is widely used in municipal drainage, industrial transportation and other fields due to its excellent compressive strength and corrosion resistance. During its production process, the high-temperature molten HDPE material easily releases volatile gases. If these gases are directly released into the working environment, long-term inhalation may pose a potential hazard to the respiratory health of operators and may even induce occupational diseases.

[0003] In existing technologies, a suction fan combined with distributed collection pipes is often used to locally capture volatile gases. For example, patent CN212045959U discloses a type B spiral wound pipe mold for HDPE (high-density polyethylene). This mold guides the gas to the processing device by equidistantly arranging a fixed number of collection pipes (six) in the molding area using negative pressure suction. However, such a uniformly distributed design has the following drawbacks in practical applications:

[0004] Due to the complexity of the mold structure and the geometric features of its edge areas, evenly spaced collection pipes cannot achieve full coverage of volatile gases, especially at mold corners, curved transitions, or irregularly shaped structures, where gas escape dead zones are easily formed. The continuous accumulation of uncaptured volatile substances not only reduces gas treatment efficiency but also leads to deterioration of air quality in the production environment, threatening personnel health. Furthermore, the rigid layout of fixed collection pipes is difficult to adapt to the deformation requirements of molds of different sizes, further limiting its versatility and adaptability.

[0005] Therefore, developing a mold structure that can eliminate blind spots in gas collection and improve the efficiency of volatile matter capture has become an urgent technical problem to be solved. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a high-density polyethylene spiral wound structure wall tube B-type tube forming mold to solve the problems of low coverage and low gas treatment efficiency when collecting volatile gases.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-density polyethylene spiral wound structured wall tube B-type tube forming mold includes a frame and an air supply pipe. An exhaust fan and a mold are respectively installed on both sides of the frame. One end of the air supply pipe is connected to the exhaust fan, and the other end is connected to multiple collection pipes to collect volatile gases released from the mold. Additionally, it includes an annular pipe and an annular slide rail. One side of the annular pipe is connected to the air supply pipe, and the bottom is connected to multiple collection pipes arranged circumferentially along the annular pipe. The annular slide rail is located below the annular pipe, and multiple sliders, each corresponding to one of the collection pipes, are slidably connected within the annular slide rail. Telescopic rods are connected to the sliders, extending radially inward along the annular slide rail and connecting to the collection pipes.

[0009] As a further improvement of this utility model, the annular tube and the annular slide rail are coaxially arranged.

[0010] As a further improvement of this utility model, the collecting tube is a flexible corrugated telescopic tube.

[0011] As a further improvement of this utility model, a gas collection hood is provided at the end of the collecting tube away from the annular tube.

[0012] As a further embodiment of this utility model: the cross-sectional shape of the annular slide rail is "T" shaped, with the wide end of the track facing outwards and the narrow end facing inwards.

[0013] As a further embodiment of this utility model: the slider is adapted to the cross-sectional shape of the track, and a screw is threaded onto the slider. Tightening the screw will cause the screw to abut against the track, thereby fixing the slider.

[0014] As a further embodiment of this utility model: the end of the telescopic rod away from the slider is rotatably connected to a clamp, and the collecting tube is snapped into the clamp.

[0015] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0016] This invention provides a high-density polyethylene spiral wound structure wall tube B-type tube forming mold. Through the coordinated design of the annular tube and the annular slide rail, multiple collection tubes can be flexibly arranged along the circumference of the mold. The radial adjustment of the telescopic rod allows the position of the collection tube openings to be freely adjusted on the horizontal plane of the annular slide rail's inner hole. This ensures that the distribution of the collection tubes can precisely cover the mold edges, curved surfaces, and irregularly shaped structural areas, eliminating the gas escape dead zones of traditional fixed layouts. Furthermore, the circumferential sliding of the slider combined with the radial extension and retraction of the telescopic rod gives the collection system strong adaptability to different mold sizes and complex contours, ensuring efficient capture of volatile gases.

[0017] Compared with existing technologies, this utility model has a larger coverage and higher gas processing efficiency when collecting volatile gases released from the mold, and can be adapted to molds of different specifications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the high-density polyethylene spiral wound structure wall tube B-type tube forming mold according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A perspective view of the high-density polyethylene spiral wound structured wall tube B-type tube forming mold at the collection tube location as described in the embodiment.

[0021] The correspondence between the labels and component names in the attached figures is as follows:

[0022] 1. Frame; 11. Support; 2. Air supply pipe; 3. Exhaust fan; 4. Mold; 5. Collection pipe; 51. Air collection hood; 6. Circular pipe; 7. Circular slide rail; 71. Slider; 72. Telescopic rod; 73. Screw; 74. Clamp; 8. Carrier plate; 9. Container box. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the following description is to be considered exemplary in nature and not restrictive.

[0024] Please refer to Figure 1 and Figure 2 In one embodiment of the high-density polyethylene spiral wound structural wall tube B-type tube forming mold provided by this utility model, the high-density polyethylene spiral wound structural wall tube B-type tube forming mold includes a frame 1 and an air supply pipe 2; wherein, the bottom of the frame 1 is mounted on a carrier plate 8, and an exhaust fan 3 and a mold 4 are respectively mounted on both sides of the frame 1, one end of the air supply pipe 2 is connected to the air inlet of the exhaust fan 3, and the other end of the air supply pipe 2 is connected to multiple collection pipes 5 to collect the volatile gases released by the mold 4, and the air outlet of the exhaust fan 3 is connected to a holding box 9, which contains a solvent so that the plastic particles in the volatile gases are dissolved in the solvent, and the remaining gas is discharged to the outside through an exhaust pipe. The above is a conventional design of the prior art.

[0025] Importantly, the high-density polyethylene spiral wound structure wall tube B-type tube forming mold also includes an annular tube 6 and an annular slide rail 7, which are fixedly mounted on the top of the frame 1 by a bracket 11; one side of the annular tube 6 is connected to an air supply pipe 2, and the bottom of the annular tube 6 is connected to four collection pipes 5, which are arranged circumferentially along the annular tube 6, and the end away from the annular tube 6 is provided with a gas collection hood 51 for convenient gas collection; the annular slide rail 7 is coaxially arranged below the annular tube 6, and its inner hole completely covers the area of ​​the mold 4 below; the annular slide rail 7 is slidably connected with... Multiple sliders 71, each corresponding to a collection tube 5, are provided. Specifically, the inner side of the annular slide rail 7 has an annular track with a "T"-shaped cross-section. The wider end of the track faces outward from the annular slide rail 7, and the narrower end faces inward. The sliders 71 are disposed inside the track, conforming to its cross-sectional shape. Screws 73 are threaded to both ends of the inner side of the sliders 71. Loosening the screws 73 allows the sliders 71 to slide freely along the annular slide rail 7, while tightening the screws 73 causes them to abut against the track, thus fixing the sliders 71 in place. Furthermore, a telescopic rod 72 is welded to the middle of the inner side of the sliders 71. A locking device is located at the connection point in the middle of the telescopic rod 72. One end of the telescopic rod 72 extends radially inward along the annular slide rail 7 and connects to the collection tube 5.

[0026] As is well known, the existing high-density polyethylene (HDPE) spiral wound structured wall pipe B-type pipe (Kra pipe) molding die 4 is mainly based on hot winding molding process. Its core is to uniformly wind molten HDPE material through rotating die 4 to form a specific structural wall. During the production process, the high-temperature molten HDPE material easily releases volatile gases. If these gases are directly released into the working environment, long-term inhalation may pose potential hazards to the respiratory health of operators and even induce occupational diseases. Therefore, it is essential to collect the volatile gases released by the die 4 in a comprehensive and efficient manner. In this embodiment, by extending and shortening the telescopic rod 72 and fixing it with a locking device, and cooperating with the slider 71 moving circumferentially along the annular slide rail 7, the horizontal position of each collection pipe 5 opening within the annular slide rail 7 can be adjusted. This not only adapts to various shapes of the die 4, but also ensures that the collection pipe 5 openings are aligned with the corners, curved transitions, or irregular structures of the die 4, which are prone to gas escape dead zones, thus efficiently handling the volatile gases.

[0027] As a preferred embodiment, the collecting pipe 5 can be a flexible corrugated expansion joint. Flexible corrugated expansion joints are a key component widely used in industrial piping systems. Their core function lies in utilizing the elastic deformation capability of the corrugated structure to achieve compensation, connection, and protection of the pipeline under different conditions. This example utilizes the expansion, contraction, or bending deformation characteristics of the corrugated structure of the flexible corrugated expansion joint to ensure smooth gas delivery without affecting the horizontal movement of the collecting pipe 5's inlet within the annular slide rail 7.

[0028] As a preferred embodiment, a clamp 74 can be provided at the end of the telescopic rod 72 away from the slider 71, which is rotatably connected to the movable end of the telescopic rod 72 via a damping shaft. The clamp 74 is made of elastic plastic and has a certain elasticity. The end away from the telescopic rod 72 has a notch, through which the opening of the collection tube 5 can be inserted into the clamp 74 and tightened by the clamp 74 to achieve the snap-fit ​​of the opening of the collection tube 5. In use, by vertically rotating the clamp 74, the angle of the opening of the collection tube 5 can be adjusted so that the opening of the collection tube 5 can be better aligned with the corners, curved transitions or irregular structures of the mold.

[0029] The method of use or working principle of this utility model is as follows:

[0030] Before production, based on the structure of mold 4 and the geometric features of its edge area, slide the slider 71 along the annular slide rail 7 in conjunction with the extension and shortening telescopic rod 72 to adjust the horizontal position of the collection pipe 5 opening within the annular slide rail 7. After adjustment, rotate the clamp 74 vertically to adjust the angle of the collection pipe 5 opening so that it aligns with the corner, curved transition, or irregular structure of the mold 4. Then production can begin. During production, the collection pipe 5 draws the volatile gas released from mold 4 into the annular pipe 6 under the action of the exhaust fan 3. The volatile gas enters the exhaust fan 3 through the annular pipe 6 and the gas supply pipe 2, and is then discharged into the holding box 9 by the exhaust fan 3. Finally, the plastic particles are removed by the solvent in the holding box 9 before being discharged.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-density polyethylene wound structure wall pipe B type pipe forming die, comprising a rack (1) and a gas delivery pipe (2), wherein an air extractor (3) and a die (4) are respectively installed on both sides of the rack (1), one end of the gas delivery pipe (2) is connected with the air extractor (3), and the other end is connected with a plurality of collection pipes (5) for collecting volatile gases released by the die (4), characterized in that, Also include annular pipe (6) and annular slide rail (7); The annular pipe (6) one side is connected the air pipe (2), the bottom is connected multiple collection pipes (5), multiple collection pipes (5) are arranged along the circumference of the annular pipe (6);The annular slide rail (7) is arranged below the annular pipe (6), multiple slide blocks (71) corresponding to the collection pipe (5) are slidably connected in the annular slide rail (7), the telescopic rod (72) is connected on the slide block (71), the telescopic rod (72) extends along the annular slide rail (7) and is connected the collection pipe (5).

2. The high-density polyethylene wound-structure-wall pipe B-type pipe forming mold according to claim 1, characterized by, The annular pipe (6) is coaxially arranged with the annular slide rail (7).

3. The high-density polyethylene wound-structure-wall pipe B-type pipe forming mold according to claim 1, characterized by, The collection pipe (5) is a flexible corrugated telescopic pipe.

4. The high-density polyethylene wound-structure-wall pipe B-type pipe forming mold according to claim 1, characterized by The collection pipe (5) is provided with a gas collecting cover (51) at one end away from the annular pipe (6).

5. The high-density polyethylene wound-structure-wall pipe B-form pipe forming mold according to claim 1, characterized by The track cross-sectional shape of the annular slide rail (7) is "T" shape, and the wide end of the track is towards the outside of the annular slide rail (7), and the narrow end is towards the inside of the annular slide rail (7).

6. The high-density polyethylene wound-structure-wall pipe B-form pipe forming mold according to claim 5, characterized by The cross-sectional shape of the slide block (71) is adapted to the track, and the screw (73) is threadedly connected on the slide block (71), and the screw (73) is abutted against the track by tightening the screw (73), so as to fix the slide block (71).

7. The high-density polyethylene wound-structure-wall pipe B-form pipe forming mold according to claim 1, characterized by The telescopic rod (72) is rotatably connected with the clamp (74) at one end away from the slide block (71), and the collection pipe (5) is clamped in the clamp (74).

Images