PVC-O pipe processing and expanding device

Abstract

The utility model relates to PVC -O pipe material processing expansion technical field discloses a kind of PVC -O pipe material processing expansion device, including shell support mechanism, expansion execution mechanism and linkage telescopic sealing mechanism, the inside of shell support mechanism is provided with expansion execution mechanism, the bottom of shell support mechanism is provided with linkage telescopic sealing mechanism.The utility model is under the initial contraction state of device, six conical expansion petals gather around heating shell, it is convenient to insert PVC -O pipe material, after positioning, motor drives six hexagonal fixed column to drive six groups of expansion execution mechanism synchronous action, after power transmission of direction changing, steering assembly, make sliding fixed link drive heating shell radial expansion, flexible gap plate synchronous filling interlaminar gap, expansion simultaneously, follow-up telescopic link drives linkage telescopic baffle along hexagonal auxiliary sealing column sliding, with sealing ring seat forms closed chamber, after cooling and shaping, motor reverse operation makes each mechanism contraction reset, and finished product can be obtained after extracting device.

Description

Technical Field

[0001] This utility model relates to the field of PVC-O pipe processing and expansion technology, and in particular to a PVC-O pipe processing and expansion device. Background Technology

[0002] PVC-O (biaxially oriented polyvinyl chloride) pipes possess advantages such as high strength, high toughness, impact resistance, and aging resistance due to the regular biaxial arrangement of their molecular chains. With increasing demands for lightweight, long-life, and disaster-resistant pipes in municipal engineering projects, they are widely used in water supply, gas supply, and drainage systems. Currently, PVC-O pipe processing expansion devices are mainly divided into two categories: "offline expansion" and "online expansion." The former involves cutting the PVC-O billet to a fixed length, heating it to 80-120℃ in an oven, and then feeding it into the expansion device for radial stretching through mechanical expansion or internal pressure expansion. After cooling and shaping, the finished product is obtained. The latter integrates the expansion device into the extrusion production line. After extrusion, the billet directly enters the device, where it undergoes local heating, synchronous expansion, and online cooling via a built-in heating module, achieving an integrated "extrusion-heating-expansion-shaping" process.

[0003] Early PVC-O expansion devices were mostly designed for a single specification, which could not flexibly adapt to the processing of pipes with different diameters. When changing models, the entire expansion assembly had to be replaced, which was costly and inefficient. With the diversification of pipe specifications required by municipal engineering projects, the industry urgently needs technology that can adjust the expansion size in a coordinated manner. Either manual adjustment of the expansion flap spacing may result in large errors, leading to uneven pipe roundness and wall thickness; or a segmented adjustment structure is used, but the linkage between the expansion flaps is poor, the synchronization error is large, and uniform expansion cannot be achieved, which in turn affects the finished product of the expanded pipe. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a PVC-O pipe processing and expansion device.

[0005] This utility model is achieved using the following technical solution: a PVC-O pipe processing expansion device, comprising a shell support mechanism, an expansion actuator, and a linkage telescopic sealing mechanism. The expansion actuator is housed inside the shell support mechanism, and the linkage telescopic sealing mechanism is located at the bottom of the shell support mechanism. The shell support mechanism includes a guide cone, with a sealing ring seat fixedly connected to its rear end. A conical expansion petal heating shell is fixedly connected to its rear end. Flexible baffle plates are fixedly connected to the left and right ends of the conical expansion petal heating shell. An expansion base is fixedly connected to the rear end of the conical expansion petal heating shell, and a motor is fixedly connected to the rear end of the sealing ring seat. The expansion actuator includes an auxiliary telescopic sliding assembly, in which a sliding block is slidably connected, and a sliding fixing rod is fixedly connected to the bottom of the sliding block. A steering fixing assembly is fixedly connected to the bottom of the sliding fixing rod, and a direction-changing auxiliary assembly is rotatably connected to the bottom of the steering fixing assembly. A telescopic drive assembly is fixedly connected to the bottom of the direction-changing auxiliary assembly, and a support base is rotatably connected to the bottom of the telescopic drive assembly. A hexagonal fixing column is fixedly connected to the bottom of the support base.

[0006] Through the above technical solution, a hexagonal fixed column serves as the central positioning and power distribution core, receiving motor power and transmitting it evenly to the components. The telescopic drive component acts as the driving core, optimizing the power path through the direction-changing auxiliary component. In conjunction with the steering fixed component, it achieves power direction conversion and trajectory locking. The sliding fixed rod receives the power, driving the sliding block to slide smoothly along the auxiliary telescopic sliding component, thereby pulling the conical expansion petal heating shell to expand radially in sync, applying a uniform radial force to the billet tube. The support base provides a stable installation fulcrum, dispersing motion stress. Overall, it ensures the synchronicity, stability, and accuracy of the expansion action, laying the foundation for the uniform orientation of the tube's molecular chains.

[0007] As a further improvement to the above solution, the front end of the conical expansion valve heating shell and the rear end of the sealing ring seat are fixedly connected. The number of conical expansion valve heating shells is set to six, and the six conical expansion valve heating shells are evenly distributed symmetrically around the rear end center of the sealing ring seat. The left and right sides of the conical expansion valve heating shell and the inner side of the flexible baffle plate are fixedly connected.

[0008] Through the above technical solution, the heating shell of the conical expansion petal has a built-in heating element that heats the billet tube to a high elastic state and directly applies expansion force to ensure that the internal temperature of the tube is uniform during expansion. At the same time, the flexible baffle plate fills the gap between the petals to avoid medium leakage and tube dent.

[0009] As a further improvement to the above solution, the rear end of the motor and the rear end center of the sealing ring seat are fixedly connected, and the front end of the motor is fixedly connected to the top of a hexagonal fixing post.

[0010] The above technical solution, fixed at the center of the rear end of the sealing ring seat, is connected to the hexagonal fixed column through the output shaft, providing a continuous and stable driving force for the telescopic action of the expansion actuator and the synchronous linkage of the telescopic sealing mechanism.

[0011] As a further improvement to the above scheme, the number of expansion actuators is set to six, and the six expansion actuators are evenly distributed symmetrically around the center of the hexagonal fixed column. The front end of the auxiliary telescopic sliding assembly and the bottom of the conical expansion valve heating shell are fixedly connected.

[0012] As a further improvement to the above solution, the linkage telescopic sealing mechanism includes a hexagonal auxiliary sealing column, the top of which is slidably connected to a linkage telescopic baffle, and the outer side of the sliding fixed rod is fixedly connected to a follower telescopic rod.

[0013] Through the above technical solution, the follow-up telescopic rod receives power, ensuring that the linkage telescopic baffle and the conical expansion valve heating shell expand / contract precisely and synchronously. The linkage telescopic baffle and the hexagonal auxiliary sealing column form a closed expansion chamber, ensuring the sealing performance under high temperature and high pressure environment.

[0014] As a further improvement to the above solution, the front end of the hexagonal auxiliary sealing post and the rear end of the hexagonal fixing post are fixedly connected.

[0015] As a further improvement to the above solution, the rear end of the follow-up telescopic rod is fixedly connected to a linkage telescopic baffle, and the number of linkage telescopic sealing mechanisms is set to six, which are symmetrically and evenly distributed around the rear end center of the hexagonal auxiliary sealing column.

[0016] The above technical solution enables the sliding fixed rod to receive power, ensuring precise synchronization of the expansion / contraction movements of the linkage telescopic baffle and the conical expansion valve heating shell, thus ensuring a sealing effect.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves precise coaxial positioning and smooth insertion of the device and the blank tube by setting: a guide cone head to complete the initial sealing of the front end, while providing a symmetrical installation reference for the internal expansion components; a conical expansion petal heating shell with built-in heating elements to heat the tube while a flexible baffle plate fills the gap between the petals to prevent medium leakage and tube dent; an expansion base to ensure the rigidity of the overall structure; and a motor to provide continuous and stable power output to the device.

[0018] This invention features a hexagonal fixed column as the central positioning and power distribution core, receiving motor power and evenly transmitting it to six components. The telescopic drive component serves as the driving core, with the power path optimized by the direction-changing auxiliary component. In conjunction with the steering fixed component, it achieves power direction conversion and trajectory locking. The sliding fixed rod receives power, driving the sliding block to slide smoothly along the auxiliary telescopic sliding component, thereby pulling the conical expansion petal heating shell to expand radially synchronously, applying a uniform radial force to the billet tube. The support base provides a stable mounting point, dispersing motion stress, and ensuring the synchronicity, stability, and precision of the expansion action. This lays the foundation for the uniform orientation of the tube's molecular chains. Simultaneously, the follow-up telescopic rod receives power, ensuring precise synchronous expansion / contraction of the linkage telescopic baffle and the conical expansion petal heating shell. The linkage telescopic baffle and the hexagonal auxiliary sealing column form a closed expansion chamber, ensuring sealing performance under high temperature and high pressure conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a schematic diagram of the structure of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model.

[0020] Explanation of key symbols: 1. Housing support mechanism; 101. Guide cone; 102. Sealing ring seat; 103. Conical expansion valve heating shell; 104. Flexible baffle plate; 105. Expansion base; 106. Motor; 2. Expansion actuator; 201. Auxiliary telescopic sliding assembly; 202. Sliding block; 203. Sliding fixing rod; 204. Steering fixing assembly; 205. Direction changing auxiliary assembly; 206. Telescopic drive assembly; 207. Support base; 208. Hexagonal fixing column; 3. Linked telescopic sealing mechanism; 301. Hexagonal auxiliary sealing column; 302. Linked telescopic baffle; 303. Follow-up telescopic rod. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Example

[0022] Please combine Figure 1-5 This embodiment of a PVC-O pipe processing expansion device includes a housing support mechanism 1, an expansion actuator 2, and a linkage telescopic sealing mechanism 3. The expansion actuator 2 is housed inside the housing support mechanism 1, and the linkage telescopic sealing mechanism 3 is located at the bottom of the housing support mechanism 1. The housing support mechanism 1 includes a guide cone 101, with a sealing ring seat 102 fixedly connected to its rear end. A conical expansion petal heating shell 103 is fixedly connected to the rear end of the sealing ring seat 102. Flexible baffle plates 104 are fixedly connected to the left and right ends of the conical expansion petal heating shell 103. An expansion base 105 is fixedly connected to the rear end of the conical expansion petal heating shell 103, and a motor 106 is fixedly connected to the rear end of the sealing ring seat 102. The expansion actuator 2 includes an auxiliary telescopic sliding assembly 201. A sliding block 202 is slidably connected inside the auxiliary telescopic sliding assembly 201. A sliding fixing rod 203 is fixedly connected to the bottom of the sliding block 202. A steering fixing assembly 204 is fixedly connected to the bottom of the sliding fixing rod 203. A direction-changing auxiliary assembly 205 is rotatably connected to the bottom of the steering fixing assembly 204. A telescopic drive assembly 206 is fixedly connected to the bottom of the direction-changing auxiliary assembly 205. A support base 207 is rotatably connected to the bottom of the telescopic drive assembly 206. A hexagonal fixing post 208 is fixedly connected to the bottom of the support base 207.

[0023] The front end of the conical expansion valve heating shell 103 is fixedly connected to the rear end of the sealing ring seat 102. There are six conical expansion valve heating shells 103. The six conical expansion valve heating shells 103 are evenly distributed symmetrically around the rear end center of the sealing ring seat 102. The left and right sides of the conical expansion valve heating shell 103 are fixedly connected to the inner side of the flexible baffle plate 104.

[0024] The rear end of the motor 106 is fixedly connected to the center of the rear end of the sealing ring seat 102, and the front end of the motor 106 is fixedly connected to the top of the hexagonal fixing post 208.

[0025] The number of expansion actuators 2 is set to six, and the six expansion actuators 2 are evenly distributed symmetrically around the center of the hexagonal fixed column 208. The front end of the auxiliary telescopic sliding assembly 201 and the bottom of the conical expansion valve heating shell 103 are fixedly connected.

[0026] The linkage telescopic sealing mechanism 3 includes a hexagonal auxiliary sealing column 301, the top of which is slidably connected to a linkage telescopic baffle 302, and the outer side of the sliding fixed rod 203 is fixedly connected to a follower telescopic rod 303.

[0027] The front end of the hexagonal auxiliary sealing post 301 and the rear end of the hexagonal fixing post 208 are fixedly connected.

[0028] The rear end of the follow-up telescopic rod 303 is fixedly connected to the linkage telescopic baffle 302. The number of linkage telescopic sealing mechanisms 3 is set to six, and the six linkage telescopic sealing mechanisms 3 are symmetrically and evenly distributed around the rear end center of the hexagonal auxiliary sealing column 301.

[0029] The implementation principle of one embodiment of this application is as follows: When the device is in the contracted state, the six conical expansion petal heating shells 103 are in a converged state, and the overall outer diameter is reduced, which facilitates the insertion of the tube to be expanded. The linkage telescopic baffle 302 retracts with the telescopic rod 303 and fits against the surface of the hexagonal auxiliary sealing column 301. The flexible baffle plate 104 naturally retracts and fills the initial gap between adjacent conical expansion petal heating shells 103. After positioning, the built-in heating function of the conical expansion petal heating shells 103 is activated to uniformly preheat the inner wall of the tube, preparing for subsequent radial expansion and molecular chain orientation. At the same time, the flexible baffle plate 104 maintains slight contact with the inner wall of the blank tube during the heating process to avoid local heat loss.

[0030] During the expansion movement, after the motor 106 starts, the power is transmitted to the six sets of expansion actuators 2 via the hexagonal fixed column 208. The telescopic drive assembly 206 receives the power and changes the transmission direction through the direction-changing auxiliary assembly 205. The steering fixed assembly 204 positions and guides the sliding fixed rod 203 to move radially, while the sliding block 202 slides along the auxiliary telescopic sliding assembly 201 to further constrain the movement trajectory and ensure smooth operation. The sliding fixed rod 203 synchronously pulls the six conical expansion petal heating shells 103, which expand outward synchronously with the rear center of the sealing ring seat 102 as the reference, applying a uniform radial force to the preheated pipe to achieve radial stretching and orientation of the molecular chains. At the same time, the flexible baffle plate 104 expands synchronously with the expansion, always filling the gaps between the petals to prevent medium leakage or pipe denting. During the expansion, the follow-up telescopic rod drives the linkage telescopic baffle to slide along the hexagonal auxiliary sealing column, forming a closed chamber with the sealing ring seat. The billet completes molecular chain orientation in the hot state. After cooling and shaping, the motor reverses to make each mechanism contract and reset, and the finished product can be obtained by pulling out the device.

[0031] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A PVC-O pipe processing and expansion device, characterized in that, The device includes a housing support mechanism (1), an expansion actuator (2), and a linkage telescopic sealing mechanism (3). The expansion actuator (2) is located inside the housing support mechanism (1), and the linkage telescopic sealing mechanism (3) is located at the bottom of the housing support mechanism (1). The housing support mechanism (1) includes a guide cone (101). A sealing ring seat (102) is fixedly connected to the rear end of the guide cone (101). A conical expansion petal heating shell (103) is fixedly connected to the rear end of the sealing ring seat (102). Flexible baffle plates (104) are fixedly connected to the left and right ends of the conical expansion petal heating shell (103). An expansion base (105) is fixedly connected to the rear end of the conical expansion petal heating shell (103). A motor (106) is fixedly connected to the rear end of the sealing ring seat (102). The expansion actuator (2) includes an auxiliary telescopic sliding assembly (201), in which a sliding block (202) is slidably connected. A sliding fixing rod (203) is fixedly connected to the bottom of the sliding block (202). A steering fixing assembly (204) is fixedly connected to the bottom of the sliding fixing rod (203). A steering auxiliary assembly (205) is rotatably connected to the bottom of the steering fixing assembly (204). A telescopic drive assembly (206) is fixedly connected to the bottom of the steering auxiliary assembly (205). A support base (207) is rotatably connected to the bottom of the telescopic drive assembly (206). A hexagonal fixing column (208) is fixedly connected to the bottom of the support base (207).

2. The PVC-O pipe processing and expansion device as described in claim 1, characterized in that: The front end of the conical expansion valve heating shell (103) and the rear end of the sealing ring seat (102) are fixedly connected. The number of conical expansion valve heating shells (103) is set to six. The six conical expansion valve heating shells (103) are evenly distributed symmetrically around the rear end center of the sealing ring seat (102). The left and right sides of the conical expansion valve heating shells (103) and the inner side of the flexible baffle plate (104) are fixedly connected.

3. The PVC-O pipe processing and expansion device as described in claim 1, characterized in that: The rear end of the motor (106) is fixedly connected to the rear center of the sealing ring seat (102), and the front end of the motor (106) is fixedly connected to the top of the hexagonal fixing column (208).

4. The PVC-O pipe processing and expansion device as described in claim 1, characterized in that: The number of expansion actuators (2) is set to six, and the six expansion actuators (2) are evenly distributed symmetrically around the center of the hexagonal fixed column (208). The front end of the auxiliary telescopic sliding assembly (201) and the bottom of the conical expansion valve heating shell (103) are fixedly connected.

5. The PVC-O pipe processing and expansion device as described in claim 1, characterized in that: The linkage telescopic sealing mechanism (3) includes a hexagonal auxiliary sealing column (301), the top of which is slidably connected to a linkage telescopic baffle (302), and the outer side of the sliding fixed rod (203) is fixedly connected to a follower telescopic rod (303).

6. The PVC-O pipe processing and expansion device as described in claim 5, characterized in that: The front end of the hexagonal auxiliary sealing post (301) and the rear end of the hexagonal fixing post (208) are fixedly connected.

7. The PVC-O pipe processing and expansion device as described in claim 5, characterized in that: The rear end of the follow-up telescopic rod (303) is fixedly connected to a linkage telescopic baffle (302), and the number of linkage telescopic sealing mechanisms (3) is set to six. The six linkage telescopic sealing mechanisms (3) are evenly distributed symmetrically around the rear end center of the hexagonal auxiliary sealing column (301).

Images