Rack pipe expanding device for PFA (Polyfluoroalkoxy) pipe

Abstract

The PFA pipe rack pipe expanding device comprises a bottom plate, guide rods are arranged at the four corners of the bottom plate respectively, a top plate is connected to the top ends of the guide rods, an opening is formed in the top plate, a clamp fixing plate is arranged between the top plate and the bottom plate, the clamp fixing plate is connected to the guide rods in a sliding mode, and a clamping mechanism used for clamping a pipeline is arranged on the clamp fixing plate. A pushing mechanism capable of driving the clamp fixing plate to slide up and down along the guide rods is arranged between the top plate and the bottom plate, and a forming mechanism used for forming the end of the pipeline is arranged on the bottom plate. The device is convenient and labor-saving to operate, the stress of the pipeline is uniform, and the product quality and the production efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline expansion devices, in particular to a PFA pipe rack expansion device. Background Art

[0002] PFA pipes are commonly used in life. During the use of PFA pipes, due to insufficient length of the pipes or rupture of the PFA pipes, the PFA pipes need to be connected. During the connection process, due to the same diameter of the pipe openings, the joints of the PFA pipes need to be expanded and connected, and beads need to be installed on the end faces of the pipes to facilitate the connection of the PFA pipes.

[0003] At present, most of the PFA pipe openings are expanded by heating, and then the PFA pipe openings are expanded by hand or simple devices. Although such pipe openings can be expanded, they are very easy to damage the PFA pipe opening structure, reduce the connection strength, and the operation is complicated and cumbersome. Therefore, some pipe opening expansion devices have appeared on the market, such as the Chinese utility model patent with authorization announcement number CN209697866U, which discloses a pipe expansion device, which adopts a screw drive, but the efficiency of the screw drive is low and the processing time required is long. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model proposes a PFA pipe rack expansion device, which is easy to operate and labor-saving, and the pipe is evenly stressed, thereby improving product quality and production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a PFA pipe rack expansion device, comprising a bottom plate, guide rods are respectively provided at the four corners of the bottom plate, the top end of the guide rod is connected to a top plate, an opening is provided on the top plate, a clamp fixing plate is provided between the top plate and the bottom plate, the clamp fixing plate is slidably connected to the guide rod, a clamping mechanism for clamping the pipe is provided on the clamp fixing plate, a pushing mechanism capable of driving the clamp fixing plate to slide up and down along the guide rod is provided between the top plate and the bottom plate, and a forming mechanism for forming the pipe end is provided on the bottom plate.

[0006] Furthermore, the long sides on both sides of the clamp fixing plate are respectively connected to the middle plates, the middle plates are arranged along the length direction of the bottom plate, and the two ends of the middle plates in the length direction are respectively slidably connected to the guide rods on both sides, and the clamping mechanism includes a first clamp seat and a second clamp seat which are detachably fixed on the clamp fixing plate, and the first clamp seat and the second clamp seat have semicircular recessed portions in the middle respectively, a protrusion is provided on the side of the first clamp seat facing the second clamp seat, and a groove for matching the protrusion is provided on the side of the second clamp seat facing the first clamp seat.

[0007] Furthermore, a pair of clamp bodies are provided between the first clamp seat and the second clamp seat, and the clamp bodies are semi-annular structures.

[0008] Furthermore, the pushing mechanism includes a pair of gear fixing blocks respectively connected to the short sides at both ends of the clamp fixing plate, and fixing strips extend outward from both ends of the gear fixing block, a rack is provided between the fixing strips on both sides, and the two ends of the rack are respectively connected to the top plate and the bottom plate, and the side of the rack with teeth is arranged toward the outside of the gear fixing block, and the smooth side of the rack is arranged close to the gear fixing block, and a rotating gear is also provided between the fixing strips on both sides, and a rotating shaft is provided on the rotating gear, and the two ends of the rotating shaft are respectively rotatably connected to the fixing strips on both sides, and the rotating gear is meshed with the rack.

[0009] Furthermore, handles are provided on the gear fixing blocks on both sides, and two support handles of the handles are fixed on the two ends of the rotating shaft respectively.

[0010] Furthermore, the molding mechanism comprises a bead inserting seat arranged on the bottom plate, the bead inserting seat is detachably provided with a bead inserting head, and the bead inserting head is detachably provided with a bead inserting body.

[0011] The PFA tube rack expansion device of the utility model is placed vertically on a plane, and uses the operator's gravity as the driving force, which makes the operation more labor-saving. Compared with the bead insertion gun with a single-sided rack structure, the two sides jointly apply force, and the force on the pipe to be inserted into the bead is more uniform, which can better ensure the concentricity of the pipe and the bead. In addition, the push rod is shorter, and the structural size is reduced compared to the original single-sided rack. It can be operated in a smaller space and has better environmental adaptability. The force is uniform during the process while ensuring the efficiency of the bead insertion connection. Under the condition of ensuring production quality, the production efficiency is greatly improved compared with the two original bead insertion guns, which improves product quality and production efficiency and reduces the defective product rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described and elaborated below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a structural schematic diagram of a PFA tube rack expansion device according to a preferred embodiment of the utility model.

[0014] Figure 2 It is a structural diagram used to reflect the propulsion mechanism.

[0015] Figure 3 It is a structural schematic diagram used to reflect the clamping mechanism.

[0016] Figure 4 It is a schematic diagram for illustrating the structure of the bead inserting seat.

[0017] Figure numerals: 1. bottom plate; 2. top plate; 3. clamp fixing plate; 31. middle plate; 32. first clamp seat; 321. protrusion; 33. second clamp seat; 331. groove; 34. clamp body; 35. gear fixing block; 351. fixing bar; 36. handle; 4. rack; 41. rotating gear; 411. rotating shaft; 5. bead inserting seat; 51. bead inserting head; 52. bead inserting body; 6. guide rod; 7. pipe. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be more clearly and completely explained below by describing the preferred embodiments of the present invention in combination with the accompanying drawings.

[0019] like Figure 1 and Figure 4 As shown, the PFA tube rack expansion device of the preferred embodiment of the utility model comprises a bottom plate 1, and the four corners of the bottom plate 1 are respectively provided with guide rods 6, and the top of the guide rods 6 is connected to the top plate 2, and the top plate 2 is provided with an opening. The beading seat 5 on the bottom plate 1, the beading seat 5 is detachably provided with a beading head 51, and the beading head 51 is detachably provided with a beading body 52, and the three are assembled into a molding mechanism. The beading head 51 is a stepped structure, and the bottom shapes of beading heads 51 of different sizes are different. When installed at different gears, the distance between the pipeline 7 and the beading body 52 can be adjusted to a certain extent.

[0020] like Figure 1 and Figure 2 As shown, a clamp fixing plate 3 is provided between the top plate 2 and the bottom plate 1, and the long sides on both sides of the clamp fixing plate 3 are respectively connected to the middle plate 31, the middle plate 31 is arranged along the length direction of the bottom plate 1, and the two ends of the middle plate 31 in the length direction are respectively slidably connected to the guide rods 6 on both sides.

[0021] like Figure 2 and 3As shown, the first clamp seat 32 and the second clamp seat 33 are detachably mounted on the clamp fixing plate 3, and the middle parts of the first clamp seat 32 and the second clamp seat 33 respectively have semicircular recessed parts, and the recesses of the first clamp seat 32 and the second clamp seat 33 form a complete circle. A pair of clamp bodies 34 are arranged between the first clamp seat 32 and the second clamp seat 33, and the clamp bodies 34 are semi-circular structures. After the clamp bodies 34 on both sides are engaged, they are stuck in the recess between the first clamp seat 32 and the second clamp seat 33, and the pipe 7 can be firmly clamped by the clamp bodies 34 on both sides. A convex block 321 is arranged on the side of the first clamp seat 32 facing the second clamp seat 33, and a groove 331 for matching the convex block 321 is arranged on the side of the second clamp seat 33 facing the first clamp seat 32. The first clamp seat 32 and the second clamp seat 33 are aligned and installed by aligning the convex block 321 with the groove 331. The first clamp seat 32 and the second clamp seat 33 can be detachably fixed together by a bolt assembly to form a clamping mechanism to achieve the purpose of fixed installation.

[0022] like Figure 1 and Figure 3 As shown, the short sides of the two ends of the clamp fixing plate 3 are respectively connected with gear fixing blocks 35, and the two ends of the gear fixing block 35 extend outward with fixing bars 351, and a depression is formed between the two fixing bars 351. A rack 4 is arranged between the fixing bars 351 on both sides, and the two ends of the rack 4 are respectively connected to the top plate 2 and the bottom plate 1. The side with teeth of the rack 4 is arranged toward the outside of the gear fixing block 35, and the smooth side of the rack 4 is arranged close to the gear fixing block 35. A rotating gear 41 is also arranged between the fixing bars 351 on both sides, and the rotating gear 41 is meshed with the rack 4. A rotating shaft 411 is arranged on the rotating gear 41, and the two ends of the rotating shaft 411 are respectively rotatably connected to the fixing bars 351 on both sides. Handles 36 are respectively arranged on the gear fixing blocks 35 on both sides, and the two support handles of the handle 36 are respectively fixed to the two ends of the rotating shaft 411. A pushing mechanism is formed to achieve the purpose of pushing the end of the pipeline 7 downward.

[0023] Specific implementation process:

[0024] 1. Select a suitable bead inserting head 51 according to the serial number of the pipe 7 to be connected, place the bead inserting head 51 on the bead inserting seat 5, and install the bead inserting body 52 of the corresponding model on the bead inserting head 51;

[0025] 2. Clean the end surface of the pipe 7 to be expanded and connected and check the flatness of the end surface;

[0026] 3. Install the clamp body 34 on the first clamp seat 32 and the second clamp seat 33, and then fix the pipe 7 with the clamp body 34 to clamp the pipe 7;

[0027] 4. Fix the clamped pipe 7 on the fixture fixing plate 3;

[0028] 5. Turn the handle 36 to push the fixture fixing plate 3, and move the pipe 7 toward the bottom plate 1, so that the bead body 52 enters the pipe 7;

[0029] 6. Rotate the handle 36 in the opposite direction to withdraw the bead inserting head 51 from the bead inserting body 52.

[0030] 7. Remove the fixture body 34 and the bead connection process is completed.

[0031] The PFA tube rack expansion device of the utility model is placed vertically on a plane, and uses the operator's gravity as the driving force, which makes the operation more labor-saving. Compared with the bead insertion gun with a single-sided rack 4 structure, the two sides jointly apply force, and the force on the pipe 7 to be inserted into the bead is more uniform, which can better ensure the concentricity of the pipe 7 and the bead. In addition, the push rod is shorter, and the structural size is reduced compared to the original single-sided rack 4. It can be operated in a smaller space and has better environmental adaptability. While ensuring the uniform force during the process, the efficiency of the bead insertion connection is guaranteed. Under the condition of ensuring production quality, the production efficiency is greatly improved compared with the two original bead insertion guns, which improves product quality and production efficiency and reduces the defective product rate.

[0032] The above specific implementations are only descriptions of the preferred implementations of the utility model, and do not limit the protection scope of the utility model. Under the premise of not departing from the design concept and spirit of the utility model, various deformations, substitutions and improvements made by ordinary technicians in this field to the technical solution of the utility model based on the text description and drawings provided by the utility model should all fall within the protection scope of the utility model. The protection scope of the utility model is determined by the claims.

Claims

1. A PFA tube rack expansion device, characterized in that: The invention comprises a bottom plate (1), wherein the four corners of the bottom plate (1) are respectively provided with guide rods (6), the top ends of the guide rods (6) are connected to a top plate (2), the top plate (2) is provided with an opening, a clamp fixing plate (3) is provided between the top plate (2) and the bottom plate (1), the clamp fixing plate (3) is slidably connected to the guide rods (6), a clamping mechanism for clamping a pipe (7) is provided on the clamp fixing plate (3), a pushing mechanism capable of driving the clamp fixing plate (3) to slide up and down along the guide rods (6) is provided between the top plate (2) and the bottom plate (1), and a molding mechanism for molding the end of the pipe (7) is provided on the bottom plate (1).

2. The PFA tube rack expansion device according to claim 1, characterized in that: The long sides of both sides of the clamp fixing plate (3) are respectively connected with intermediate plates (31), the intermediate plates (31) are arranged along the length direction of the bottom plate (1), and the two ends of the intermediate plates (31) in the length direction are respectively slidably connected to the guide rods (6) on both sides, and the clamping mechanism comprises a first clamp seat (32) and a second clamp seat (33) which are detachably fixed on the clamp fixing plate (3), the first clamp seat (32) and the second clamp seat (33) respectively have semicircular recessed parts in the middle, the first clamp seat (32) is provided with a protrusion (321) on the side facing the second clamp seat (33), and the second clamp seat (33) is provided with a groove (331) for matching the protrusion (321) on the side facing the first clamp seat (32).

3. The PFA tube rack expansion device according to claim 2, characterized in that: A pair of clamp bodies (34) are provided between the first clamp seat (32) and the second clamp seat (33), and the clamp bodies (34) are semi-annular structures.

4. The PFA tube rack expansion device according to claim 2, characterized in that: The pushing mechanism comprises a pair of gear fixing blocks (35) respectively connected to the short sides at both ends of the clamp fixing plate (3), and fixing bars (351) are extended outward from both ends of the gear fixing block (35), and a rack (4) is arranged between the fixing bars (351) on both sides, and the two ends of the rack (4) are respectively connected to the top plate (2) and the bottom plate (1), and the side of the rack (4) with teeth is arranged toward the outside of the gear fixing block (35), and the smooth side of the rack (4) is arranged in close contact with the gear fixing block (35), and a rotating gear (41) is also arranged between the fixing bars (351) on both sides, and a rotating shaft (411) is provided on the rotating gear (41), and the two ends of the rotating shaft (411) are respectively rotatably connected to the fixing bars (351) on both sides, and the rotating gear (41) is meshed with the rack (4).

5. The PFA tube rack expansion device according to claim 4, characterized in that: The gear fixing blocks (35) on both sides are respectively provided with handles (36), and two support handles of the handles (36) are respectively fixed at two ends of the rotating shaft (411).

6. The PFA tube rack expansion device according to claim 1, characterized in that: The molding mechanism comprises a bead inserting seat (5) arranged on a bottom plate (1), a bead inserting head (51) being detachably provided on the bead inserting seat (5), and a bead inserting body (52) being detachably provided on the bead inserting head (51).

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