A pre-seal device for thermoforming

Abstract

The utility model relates to pipeline repair technical field especially, it is a kind of advance sealing device for thermoforming method, to solve the technical problem of complex operation, unstable quality, low construction efficiency and poor sealing reliability in related art due to the sealing mode of wrapping lining pipe with manpower cotton quilt, heating and softening and then plugging into rubber plug. The advance sealing device for thermoforming method comprises: base frame, plugging assembly and clamping assembly, and plugging assembly and plastic tube are sequentially inserted in base frame. The clamping assembly comprises movable clamp block and fixed clamp block. The advance sealing device for thermoforming method is clamped and connected with plastic tube through the opposite movement of movable clamp block and fixed clamp block, and then the end face of plastic tube is pressed by plugging assembly to form sealing, so that sealing operation is quickly and stably completed, construction efficiency is effectively improved and the reliability of sealing is ensured. The technical problem of complex operation, unstable quality, low construction efficiency and poor sealing reliability due to the sealing mode of wrapping lining pipe with cotton quilt, heating and melting is overcome.

Description

Technical Field

[0001] This utility model relates to the field of trenchless pipeline repair technology, and in particular to a pre-sealing device for thermoplastic molding. Background Technology

[0002] In pipeline repair work, the current common method is to heat the liner by wrapping it with a cotton blanket. After the liner is heated and softened, the blanket is removed and multiple people work together to insert a rubber plug into the liner to seal it. However, this operation is labor-intensive and difficult to coordinate with multiple people. In addition, steam can easily leak from the blanket wrapping area, causing burns. As a result, the heating and softening effect is unstable, and the sealing reliability is poor.

[0003] Existing pipe sealing operations suffer from technical problems due to the use of a sealing method that involves wrapping the liner in a cotton quilt, heating it to soften it, and then inserting a rubber plug. This method is complex, results in unstable quality, low construction efficiency, and poor sealing reliability. Utility Model Content

[0004] The purpose of this utility model is to provide a pre-sealing device for thermoplastic molding, so as to solve the technical problems in the related technology that the sealing method of wrapping the liner with cotton quilt, heating and softening it and then stuffing it with a rubber plug is complicated to operate, unstable in quality, and thus has low construction efficiency and poor sealing reliability.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] The pre-sealing device for thermoplastic molding provided by this utility model includes:

[0007] The system comprises a base frame, a sealing assembly, and a clamping assembly, with the sealing assembly and a plastic tube sequentially inserted into the base frame. The clamping assembly includes a movable locking block and a fixed locking block mounted on the base frame, respectively positioned on both sides of the plastic tube. The opposing movement of the movable and fixed locking blocks compresses the plastic tube. The sealing assembly seals the open end of the plastic tube.

[0008] Specifically, the base frame includes a main frame and a partition. The partition is installed on the main frame and divides the main frame into a first space and a second space. The main frame has an insertion port communicating with the first space. The movable locking block and the fixed locking block are installed in the first space and located on both sides of the insertion port. When the plastic tube is inserted into the insertion port, the movable locking block and the fixed locking block move towards each other to clamp the plastic tube.

[0009] Specifically, the clamping assembly further includes a first connecting rod and a second connecting rod, and the fixed locking block is mounted on the main frame. The first connecting rod, the movable locking block, the second connecting rod, and the base frame are sequentially hinged to form a parallelogram-shaped linkage group. The rotation of the first connecting rod and the second connecting rod is used to drive the movable locking block to press against the fixed locking block.

[0010] Specifically, the clamping assembly further includes a drive linkage and a tension bolt assembly, the tension bolt assembly including a tension screw and a tension nut. The movable locking block, the drive linkage, and the tension screw are sequentially hinged, with each hinge axis parallel. The tension screw is inserted into the main frame and threadedly connected to the tension nut, which abuts against the main frame. The engagement of the tension screw and the tension nut drives the movable locking block to press against the fixed locking block.

[0011] Specifically, the hinge axis between the first connecting rod and the movable locking block, and the hinge axis between the driving connecting rod and the movable locking block are coaxial. The hinge axis between the first connecting rod and the main frame intersects the axis of the tensioning screw. The tensioning screw provides driving force to the driving connecting rod through the abutment of the tensioning nut against the main frame. The shorter of the driving connecting rod and the first connecting rod serves as the support rod. The engagement of the tensioning screw and the tensioning nut drives the support rod to swing in a direction that increases the angle with the horizontal plane, thereby pressing the movable locking block against the fixed locking block.

[0012] Specifically, the sealing assembly includes a sealing gasket and a spring. The sealing gasket is made of high-temperature resistant rubber and is installed in the first space. The spring is installed in the second space and penetrates the partition, abutting against the end of the sealing gasket away from the plastic tube. It applies a spring force to the sealing gasket pointing towards the plastic tube, so that the sealing gasket presses against the end face of the plastic tube.

[0013] Specifically, the sealing assembly further includes a guide pin and a limiting screw. The guide pin is mounted axially to the partition along the main frame and inserted into the sealing gasket, providing guidance for the sliding of the sealing gasket. The limiting screw penetrates the partition and is threaded into the sealing gasket, limiting the sliding distance of the sealing gasket.

[0014] Specifically, a traction ring is provided at the end of the base frame away from the plastic tube. The traction ring is used to connect a towing rope to tow the plastic tube.

[0015] Specifically, it also includes a wear-resistant guide head, which is tapered and installed on the base frame at the end away from the plastic tube, with the large-diameter end of the tapered shape facing the plastic tube.

[0016] Specifically, the wear-resistant guide head includes a first segment and a second segment, which are respectively snapped onto the base frame and connected as a whole by bolts.

[0017] Based on the above technical solutions, the beneficial effects of this utility model are analyzed as follows:

[0018] This utility model provides a pre-sealing device for thermoplastic molding, comprising:

[0019] The system comprises a base frame, a sealing assembly, and a clamping assembly, with the sealing assembly and a plastic tube sequentially inserted into the base frame. The clamping assembly includes a movable locking block and a fixed locking block mounted on the base frame, respectively positioned on both sides of the plastic tube. The opposing movement of the movable and fixed locking blocks compresses the plastic tube. The sealing assembly seals the open end of the plastic tube.

[0020] In practical applications, the end face of the plastic tube is cut flat and smooth, without obvious burrs or sharp edges. The plastic tube is inserted into the base frame, and the movable and fixed clamps are adjusted to clamp the plastic tube. The sealing assembly is then released to seal the end face of the plastic tube.

[0021] As can be seen, compared with existing technologies, this pre-sealing device for thermoplastic molding clamps the plastic tube by the opposing movement of the movable and fixed clamps, and then, in conjunction with the sealing assembly, presses the end face of the plastic tube to form a seal, thereby quickly and stably completing the sealing operation, effectively improving construction efficiency and ensuring the reliability of the seal. It overcomes the technical problems of existing pipe sealing operations, such as the complexity of operation, unstable quality, low construction efficiency, and poor seal reliability caused by wrapping the pipe with a blanket. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall structure of the pre-sealing device for thermoplastic molding provided in this embodiment of the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the overall structure of the pre-sealing device used in thermoplastic molding. Figure 2 ;

[0025] Figure 3 This is a cross-sectional schematic diagram of the pre-sealing device used in thermoplastic molding.

[0026] Figure 4 This is a structural diagram of the sealing component.

[0027] Figure 5 This is a schematic diagram of the base frame.

[0028] icon:

[0029] 001. Plastic pipe;

[0030] 100. Base frame; 110. Main frame; 101. Insertion port; 102. Traction ring; 120. Partition plate;

[0031] 200. Sealing assembly; 210. Sealing gasket; 220. Spring; 230. Guide pin; 240. Limit screw;

[0032] 300 Clamping assembly; 310 Movable locking block; 320 Fixed locking block; 330 First connecting rod; 340 Second connecting rod; 350 Drive connecting rod; 360 Tensioning bolt pair; 361 Tensioning screw; 362 Tensioning nut;

[0033] 400, wear-resistant guide head; 410, first segment; 420, second segment. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] 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 to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] Existing pipe sealing operations suffer from technical problems due to the use of cotton blankets for sealing, which leads to complex operations, unstable quality, low construction efficiency, and poor sealing reliability.

[0038] In view of this, the present invention provides a pre-sealing device for thermoplastic molding, comprising:

[0039] A base frame 100, a sealing assembly 200, and a clamping assembly 300 are sequentially inserted into the base frame 100. The sealing assembly 200 and the plastic tube 001 are installed in sequence. The clamping assembly 300 includes a movable locking block 310 and a fixed locking block 320 mounted on the base frame 100, with the movable locking block 310 and the fixed locking block 320 respectively disposed on both sides of the plastic tube 001. The opposing movement of the movable locking block 310 and the fixed locking block 320 is used to clamp the plastic tube 001. The sealing assembly 200 is used to seal the open end of the plastic tube 001.

[0040] In summary, the pre-sealing device for thermoplastic molding provided by this utility model can achieve the following technical effects:

[0041] This pre-sealing device for thermoplastic molding clamps the plastic tube 001 through the opposing movements of the movable clamp 310 and the fixed clamp 320. Then, the sealing component 200 presses the end face of the plastic tube 001 to form a seal, thus quickly and stably completing the sealing operation, effectively improving construction efficiency and ensuring the reliability of the seal. It overcomes the technical problems of existing pipe sealing operations, which involve using a cotton quilt-wrapped liner for heating and welding, resulting in complex operation, unstable quality, low construction efficiency, and poor seal reliability.

[0042] The following combination Figures 1 to 5 The structure and shape of the pre-sealing device for thermoplastic molding provided in this embodiment are described in detail:

[0043] In this embodiment, the base frame 100 includes a main frame 110 and a partition 120. The partition 120 is installed on the main frame 110 and divides the main frame 110 into a first space and a second space. The main frame 110 has an insertion port 101 communicating with the first space. A movable locking block 310 and a fixed locking block 320 are installed in the first space and located on both sides of the insertion port 101. When the plastic tube 001 is inserted into the insertion port 101, the movable locking block 310 and the fixed locking block 320 move towards each other to clamp the plastic tube 001.

[0044] Regarding the structural composition of the clamping assembly 300, specifically:

[0045] The clamping assembly 300 also includes a first connecting rod 330 and a second connecting rod 340, and a fixed locking block 320 is mounted on the main frame 110. The first connecting rod 330, the movable locking block 310, the second connecting rod 340, and the base frame 100 are sequentially hinged to form a parallelogram-shaped linkage group. The rotation of the first connecting rod 330 and the second connecting rod 340 is used to drive the movable locking block 310 to press against the fixed locking block 320.

[0046] Specifically, regarding how the active card block 310 is driven:

[0047] The clamping assembly 300 also includes a drive link 350 and a tension bolt assembly 360, which includes a tension screw 361 and a tension nut 362. The movable locking block 310, drive link 350, and tension screw 361 are sequentially hinged, with each hinge axis parallel. The tension screw 361 is inserted into the main frame 110 and threadedly connected to the tension nut 362, which abuts against the main frame 110. The engagement of the tension screw 361 and tension nut 362 drives the movable locking block 310 to press against the fixed locking block 320. When the tension nut 362 is positioned on the side of the main frame 110 away from the drive link 350, the engagement of the tension screw 361 and tension nut 362 pulls the tension screw 361 away from the sealing gasket 210. When the tension nut 362 is positioned on the main frame 110 near the drive linkage 350, the engagement of the tension screw 361 and the tension nut 362 is used to pull the tension screw 361 to move towards the sealing gasket 210.

[0048] In this embodiment, the hinge axis between the first connecting rod 330 and the movable locking block 310, and the hinge axis between the driving connecting rod 350 and the movable locking block 310 are coaxial. The hinge axis between the first connecting rod 330 and the main frame 110 intersects the axis of the tensioning screw 361. The tensioning screw 361 provides driving force to the driving connecting rod 350 through the abutment of the tensioning nut 362 against the main frame 110. The shorter rod between the driving connecting rod 350 and the first connecting rod 330 serves as the support rod. The engagement of the tensioning screw 361 and the tensioning nut 362 drives the support rod to swing in a direction that increases the angle of inclination with the horizontal plane, thereby pressing the movable locking block 310 against the fixed locking block 320. When the angle between the drive link 350 and the first link 330 is an acute angle, the hinge axis between the first link 330 and the main frame 110, and the hinge axis between the tension screw 361 and the drive link 350 move away from each other, thereby causing the movable block 310 to press against the fixed block 320. When the angle between the drive link 350 and the first link 330 is a blunt angle, the hinge axis between the first link 330 and the main frame 110, and the hinge axis between the tension screw 361 and the drive link 350 move closer to each other, thereby causing the movable block 310 to press against the fixed block 320.

[0049] Regarding the structural composition of the sealing component 200, specifically:

[0050] The sealing assembly 200 includes a sealing gasket 210 and a spring 220. The sealing gasket 210 is made of high-temperature resistant rubber and is installed in the first space. The spring 220 is installed in the second space and penetrates the partition 120 to abut against the end of the sealing gasket 210 away from the plastic tube 001. It applies a spring force to the sealing gasket 210 pointing towards the plastic tube 001 so that the sealing gasket 210 presses against the end face of the plastic tube 001. To prevent pressure loss at the connection between the sealing gasket 210 and the plastic tube 001 when hot steam is introduced into the plastic tube 001, the high-temperature resistant rubber material of the sealing gasket 210 can be a soft silicone gasket with a Shore A30 rating or a fluororubber with a Shore D90 rating. The spring 220 has a pressure of 2000N, allowing the sealing gasket 210 to withstand steam at 100°C and a pressure of 0.1MPa.

[0051] To improve the movement stability of the sealing gasket 210, in this embodiment, the sealing assembly 200 further includes a guide pin 230 and a limiting screw 240. The guide pin 230 is mounted axially along the main frame 110 on the partition 120 and inserted into the sealing gasket 210, providing guidance for the sliding of the sealing gasket 210. The limiting screw 240 penetrates the partition 120 and is threadedly connected to the sealing gasket 210, limiting the sliding distance of the sealing gasket 210. The limiting screw 240 is also used to pull the sealing gasket 210 to compress the spring 220, providing operating space for the movable locking block 310 and the fixed locking block 320 to compress the plastic tube 001.

[0052] In this embodiment, a traction ring 102 is provided at the end of the base frame 100 away from the plastic pipe 001. The traction ring 102 is used to connect to the towing rope to tow the plastic pipe 001 to the construction position.

[0053] In order to avoid jamming caused by unevenness or other factors during the dragging of the plastic tube 001, the pre-sealing device for thermoplastic molding in this embodiment also includes a wear-resistant guide head 400. The wear-resistant guide head 400 is tapered and installed on the base frame 100 at the end away from the plastic tube 001, with the large diameter end of the tapered shape facing the plastic tube 001.

[0054] To facilitate the assembly and disassembly of the wear-resistant guide head 400, in this embodiment, the wear-resistant guide head 400 includes a first segment 410 and a second segment 420. The first segment 410 and the second segment 420 are respectively snapped onto the base frame 100 and connected as a whole by bolts, while simultaneously enclosing the second space.

[0055] In summary, the specific working process of the pre-sealing device for thermoplastic molding provided in this embodiment is as follows:

[0056] Cut the end face of the plastic tube 001 flat and smooth.

[0057] By rotating the limiting screw 240, the sealing gasket 210 is pulled to fit against the partition 120, while the spring 220 is compressed.

[0058] Insert the plastic tube 001 into the main frame 110 through the insertion port 101.

[0059] Tightening the tension nut 362 pulls the tension screw 361, thereby driving the movable locking block 310 to press against the fixed locking block 320 through the drive link 350. The plastic tube 001 located in the movable locking block 310 and the fixed locking block 320 is clamped, forming a stable connection.

[0060] The limit screw 240 is rotated in the opposite direction to release the sealing gasket 210. The spring 220 extends and causes the sealing gasket 210 to press against the end face of the plastic tube 001, forming a stable seal.

[0061] The first segment 410 and the second segment 420 are respectively snapped onto the base frame 100 and connected together by bolts to form a conical guide head.

[0062] Connect the towing rope to the traction ring 102, and pull the towing rope to drag the plastic pipe 001 to the construction position through the traction ring 102.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pre-seal device for use in a thermoforming process, characterized in that, include: The base frame (100), the sealing assembly (200) and the clamping assembly (300) are sequentially inserted into the base frame (100). The clamping assembly (300) includes a movable clamping block (310) and a fixed clamping block (320) mounted on the base frame (100), and the movable clamping block (310) and the fixed clamping block (320) are respectively disposed on both sides of the plastic tube (001); The opposing movement of the movable block (310) and the fixed block (320) is used to press the plastic tube (001). The sealing assembly (200) is used to seal the open end of the plastic tube (001).

2. The pre-sealing device for thermoplastic molding according to claim 1, characterized in that: The base frame (100) includes a main frame (110) and a partition (120), the partition (120) being installed on the main frame (110) and dividing the main frame (110) into a first space and a second space; The main frame (110) has an insertion port (101) that communicates with the first space. The movable card block (310) and the fixed card block (320) are installed in the first space and located on both sides of the insertion port (101); When the plastic tube (001) is inserted into the insertion port (101), the movable locking block (310) and the fixed locking block (320) move in opposite directions to clamp the plastic tube (001).

3. The pre-sealing device for thermoplastic molding according to claim 2, characterized in that: The clamping assembly (300) further includes a first link (330) and a second link (340), and the fixing block (320) is installed on the main frame (110). The first connecting rod (330), the movable locking block (310), the second connecting rod (340) and the base frame (100) are sequentially hinged to form a parallelogram-shaped connecting rod group; The rotation of the first link (330) and the second link (340) is used to drive the movable block (310) to press against the fixed block (320).

4. The pre-sealing device for thermoplastic molding according to claim 3, characterized in that: The clamping assembly (300) further includes a drive link (350) and a tension bolt assembly (360), the tension bolt assembly (360) including a tension screw (361) and a tension nut (362). The movable latch (310), the drive link (350), and the tensioning screw (361) are hinged in sequence, and the hinge axes are parallel. The tensioning screw (361) is inserted into the main frame (110) and threadedly connected to the tensioning nut (362), which abuts against the main frame (110). The engagement of the tensioning screw (361) and the tensioning nut (362) is used to drive the movable locking block (310) to press against the fixed locking block (320).

5. The pre-sealing device for thermoplastic molding according to claim 4, characterized in that: The first connecting rod (330) and the hinge axis of the movable block (310) are coaxial, and the driving connecting rod (350) and the hinge axis of the movable block (310) are coaxial. The hinge axis of the first connecting rod (330) and the main frame (110) intersects the axis of the tensioning screw (361); The tensioning screw (361) provides driving force to the drive link (350) through the abutment of the tensioning nut (362) against the main frame (110); The shorter of the two rods, the drive link (350) and the first link (330), is used as the support rod. The engagement of the tensioning screw (361) and the tensioning nut (362) is used to drive the support rod to swing in the direction of increasing inclination angle with the horizontal plane, thereby causing the movable block (310) to press against the fixed block (320).

6. The pre-sealing device for thermoplastic molding according to claim 2, characterized in that: The sealing assembly (200) includes a sealing gasket (210) and a spring (220). The sealing gasket (210) is made of high-temperature resistant rubber and is installed in the first space. The spring (220) is installed in the second space and penetrates the partition (120) to abut against the end of the sealing gasket (210) away from the plastic tube (001), for applying a spring force to the sealing gasket (210) pointing towards the plastic tube (001) so that the sealing gasket (210) presses against the end face of the plastic tube (001).

7. The pre-sealing device for thermoplastic molding according to claim 6, characterized in that: The sealing assembly (200) also includes a guide pin (230) and a limiting screw (240). The guide pin (230) is mounted on the partition (120) along the axial direction of the main frame (110) and inserted into the sealing gasket (210) to provide guidance for the sliding of the sealing gasket (210); The limiting screw (240) penetrates the partition (120) and is threaded to the sealing gasket (210) to limit the sliding distance of the sealing gasket (210).

8. The pre-sealing device for thermoplastic molding according to claim 1, characterized in that: A traction ring (102) is provided at the end of the base frame (100) away from the plastic tube (001). The traction ring (102) is used to connect a towing rope to tow the plastic tube (001).

9. The pre-sealing device for thermoplastic molding according to claim 1, characterized in that: It also includes a wear-resistant guide head (400), which is tapered and installed on the base frame (100) at the end away from the plastic tube (001), with the large diameter end of the tapered shape facing the plastic tube (001).

10. The pre-sealing device for thermoplastic molding according to claim 9, characterized in that: The wear-resistant guide head (400) comprises a first part (410) and a second part (420), the first part (410) and the second part (420) are respectively clamped on the base frame (100) and are integrated by bolt connection.

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