Teflon-lined pipe fitting sintering furnace and sintering method

Abstract

The sintering furnace comprises a sintering box, a mounting frame, a rotating beam and a plurality of clamp assemblies, the mounting frame can be close to or away from the sintering box, the rotating beam is rotatably mounted on the side, close to the sintering box, of the mounting frame, the rotating beam comprises a plurality of first insertion holes, and the first insertion holes are distributed in the length direction of the rotating beam; one ends of the clamp assemblies can penetrate through the first inserting holes, the clamp assemblies can be fixedly installed on the rotating beam, the other ends of the clamp assemblies can fixedly clamp pipe fittings, the two clamp assemblies are installed in the two opposite first inserting holes of the rotating beam, the first inserting rods and the second inserting rods are locked to be fixed to the rotating beam, and the rotating beam can enter the sintering box. The flange of the pipe fitting is clamped and fixed through the clamp assemblies, the two clamp assemblies are connected to the rotating beam in an inserted mode, the two clamp assemblies can be locked through mutual connection of the first inserting rod and the second inserting rod, welding and cutting are not needed, and production operation is more convenient and faster.

Description

Technical Field

[0001] This invention relates to the field of PTFE-lined production equipment technology, and more specifically, to a PTFE-lined pipe fitting sintering furnace and sintering method. Background Technology

[0002] In the existing technology, the existing PTFE-lined sintering furnace includes a rotating beam. The tube is installed with an internal mold, filled with PTFE, and both ends are sealed. The end plates of the filled tube are fixed to the rotating beam by welding. After sintering, the weld points need to be cut off by a cutting machine before the sintered tube can be removed. After removing the tube, the welding residue on the rotating beam and end plates also needs to be ground. The process is very complicated, and welding requires certain technical skills to fix the tube to the rotating beam. Welding and grinding both require additional energy. Therefore, a technical solution is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art, so that the pipe fittings can be more easily fixed on the rotating beam without welding, cutting, or grinding, and to provide a PTFE-lined pipe fitting sintering furnace and sintering method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention discloses a sintering furnace for PTFE-lined pipe fittings, comprising a sintering box, a mounting frame, a rotating beam, and multiple clamping assemblies. The mounting frame can be close to or away from the sintering box. The rotating beam is rotatably mounted on the side of the mounting frame close to the sintering box. The rotating beam includes multiple first insertion holes arranged along the length of the rotating beam. One end of each clamping assembly can pass through a first insertion hole and can be fixedly mounted on the rotating beam. The other end of each clamping assembly can fix and clamp the pipe fitting. The rotating beam can enter the sintering box.

[0006] Furthermore, the device includes a first insert rod and a second insert rod. The first insert hole has two rows, with the two rows of first insert holes located on opposite sides of the rotating beam. The rotating beam includes a plurality of second insert holes, which are arranged along the length direction. The second insert holes have two rows, with the two rows of second insert holes located on other opposite sides of the rotating beam. The two clamping assemblies partially overlap within the rotating beam, and the first insert rod and the second insert rod pass through the two clamping assemblies and are fixedly connected to each other.

[0007] Furthermore, the clamp assembly includes a bracket, which is partially located inside the rotating beam. The bracket includes a ring plate and a connecting plate. The ring plate abuts against the outer wall of the rotating beam. The connecting plate is located at one end of the bracket inside the rotating beam. The two connecting plates are stacked one above the other. The connecting plate has through holes. The first insert rod passes through the two through holes. The first insert rod and the second insert rod are threadedly fixedly connected.

[0008] Furthermore, the end of the bracket is provided with a limiting hole, and the connecting plate is provided with an insert plate. The insert plate is located at one end of the connecting plate near the other bracket, and the insert plate of one connecting plate is inserted into the limiting hole of the other bracket.

[0009] Furthermore, the bracket is fitted with a rubber ring, which is sleeved on the outer wall of the bracket and installed on the side of the ring plate near the rotating beam. The rubber ring is elastically deformable.

[0010] Furthermore, the end of the first insert rod that extends into the rotating beam is tapered, the second insert rod includes a threaded rod located at the end of the second insert rod near the first insert rod, and the first insert rod is provided with a threaded hole corresponding to the threaded rod.

[0011] Furthermore, the clamp assembly includes an end plate, multiple guide grooves, multiple movable frames, and multiple clamping plates. The guide grooves extend radially along the end plate, the movable frames are movable along the guide grooves, the clamping plates are mounted on the movable frames, and the clamping plates are movable axially along the end plate. Each clamping plate includes a chuck that is close to or away from the end plate, and the flange of the pipe fitting can be clamped and fixed between the chuck and the end plate.

[0012] Furthermore, the multiple guide grooves are arranged in a ring with the end plate, and the multiple clamping plates form a space for the flange to be held in a ring.

[0013] Furthermore, the movable frame includes a first guide plate and a fixed plate. The first guide plate is movable along the guide groove. The fixed plate is located at the end of the first guide plate away from the guide groove and is perpendicular to the first guide plate. The first guide plate includes a locking groove, and the guide groove and the locking groove are fixed together by bolts. The clamping plate includes a second guide plate, which passes through the first guide plate. The second guide plate and the first guide plate are slidably connected and can be locked by bolts.

[0014] This invention discloses a sintering method using the aforementioned PTFE-lined pipe fitting sintering furnace, comprising the following steps:

[0015] S1. Select the clamp assembly corresponding to the pipe fitting flange, with the end plate of the clamp assembly facing upwards, insert the lower end of the clamp assembly bracket into the corresponding clamp frame, expand the multiple movable frames of the clamp assembly outwards, and place the end of the pipe fitting on the end plate of the clamp assembly.

[0016] S2. Retract all the movable frames inward and lock them. Move the clamping plate close to the flange of the pipe fitting. Use the clamping head and end plate of the clamping plate to clamp the flange of the pipe fitting and fix the clamping plate.

[0017] S3. Install the two clamping assemblies into the two opposite first insertion holes of the rotating beam, and insert the first insertion rod and the second insertion rod into the two second insertion holes respectively. Secure the two clamping assemblies to the rotating beam by locking the first insertion rod and the second insertion rod with threads.

[0018] The beneficial effects of this invention are:

[0019] The mounting frame of the PTFE-lined pipe fitting sintering furnace of the present invention can be opened and closed by being close to or away from the sintering box. The flange of the pipe fitting is clamped and fixed on the rotating beam of the mounting frame by a clamp assembly. The two clamp assemblies are detachably installed and inserted into the rotating beam, and are connected to each other by a first insert rod and a second insert rod so that the two clamp assemblies can be locked together. No welding or cutting is required, making the installation and insertion of pipe fittings more convenient and faster. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one embodiment.

[0021] Figure 2 This is a partial schematic diagram of the rotating beam in this embodiment.

[0022] Figure 3 This is a cross-sectional view of this embodiment.

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0025] Figure 6 This is a schematic diagram of a clamping assembly in this embodiment.

[0026] Reference numerals: 1. Sintering box; 2. Mounting frame; 3. Rotating beam; 31. First insertion hole; 32. Second insertion hole; 4. Clamp assembly; 41. Bracket; 411. Ring plate; 412. Guide groove; 413. End plate; 414. Connecting plate; 4141. Through hole; 4142. Insert plate; 415. Limiting hole; 42. Moving frame; 421. First guide plate; 4211. Locking groove; 422. Fixing plate; 43. Clamping plate; 431. Clamp; 432. Second guide plate; 44. Rubber ring; 5. First insertion rod; 6. Second insertion rod; 61. Threaded rod; 101. Pipe fitting; 102. Flange. Detailed Implementation

[0027] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1-6 As shown, this embodiment discloses a PTFE-lined pipe fitting sintering furnace, including a sintering box 1, a mounting frame 2, a rotating beam 3, multiple clamping assemblies 4, multiple first insert rods 5, and multiple second insert rods 6. The sintering box 1 is fixedly installed on the ground, and the temperature inside the sintering box 1 can be controlled and heated. The mounting frame 2 is installed on a slide rail. The controller controls the mounting frame 2 to approach the sintering box 1 and close the opening of the sintering box 1, so that a sintering space is formed inside the sintering box 1. The mounting frame 2 can approach or move away from the sintering box 1. The rotating beam 3 is equipped with the pipe fitting 101 and enters the sintering box 1 for sintering. After the mounting frame 2 moves away from the sintering box 1, the rotating beam 3 can leave the sintering box 1. When the rotating beam 3 leaves the sintering box 1, the clamping assemblies 4 installed on the rotating beam 3 can be installed and disassembled. The sintered pipe fitting 101 can also be cooled by an external fan.

[0029] The rotating beam 3 is rotatably mounted on the side of the mounting frame 2 near the sintering box 1. The rotating beam 3 is rotated by a motor, reducer, sprocket, and chain drive. The pipe fitting 101 is mounted on the rotating beam 3. The rotation makes the PTFE inside the pipe fitting 101 heat more evenly and the sintering effect better. The rotating beam is a rectangular hollow column structure. The rotating beam 3 includes multiple first insertion holes 31 and multiple second insertion holes 32. The multiple first insertion holes 31 are arranged along the length direction of the rotating beam 3. There are two rows of first insertion holes 31 located on opposite sides of the rotating beam 3. The multiple second insertion holes 32 are arranged along the length direction. There are two rows of second insertion holes 32 located on the other opposite sides of the rotating beam 3. The positions of every two first insertion holes 31 and two second insertion holes 32 on the rotating beam 3 correspond. That is, every two first insertion holes 31 are equipped with two clamping assemblies 4, and every two second insertion holes 32 are equipped with one first insertion rod 5 and one second insertion rod 6.

[0030] like Figure 2 , Figure 3 , Figure 4 As shown, the clamp assembly 4 can be fixedly installed on the rotating beam 3. One end of the clamp assembly 4 can pass through the first insertion hole 31. The two clamp assemblies 4 partially overlap within the rotating beam 3. The first insertion rod 5 and the second insertion rod 6 pass through the two clamp assemblies 4 and are fixedly connected to each other. The clamp assembly 4 includes a bracket 41, which is partially located within the rotating beam 3. The bracket 41 includes an annular plate 411 and a connecting plate 414. The annular plate 411 abuts against the outer wall of the rotating beam 3 and limits the installation depth of the bracket 41. The connecting plate 414 is located at the end of the bracket 41 within the rotating beam 3. The two brackets 41 are installed in a group, one above the other, so that the two connecting plates 414 are stacked on top of each other. The connecting plate 414 has through holes 4141 through which the first insertion rod 5 passes. The first insertion rod 5 and the second insertion rod 6 are threadedly fixedly connected. The first insertion rod 5 passes through the two connecting plates 414 to form a pin structure. The two brackets 41 can be locked by the connection and fixation between the second insertion rod 6 and the first insertion rod 5.

[0031] Because a gap may exist in the connection between the bracket 41 and the first insertion hole 31, the bracket 41 and the first insertion hole 31 may collide when the rotating beam 3 rotates. A rubber ring 44 is installed on the bracket 41, fitted onto the outer wall of the bracket 41. The rubber ring 44 is installed on the side of the ring plate 411 near the rotating beam 3. The rubber ring 44 is elastically deformable, and its installation can be squeezed to fill the gap between the rotating beam 3 and the first insertion hole 31, making the connection more stable. However, the setting of the rubber ring 44 causes misalignment between the two through holes 4141 of the two connecting plates 414. The end of the first insertion rod 5 that extends into the rotating beam 3 is tapered, and the diameter of the tapered shape gradually decreases towards the second insertion rod 6. The second insertion rod 6 includes a threaded rod 61, which is located near the first insertion rod. At one end of the first insert rod 5, the first insert rod 5 is provided with a threaded hole corresponding to the threaded rod 61. The diameter of the threaded rod 61 is smaller than that of the through hole 4141. During installation, the second insert rod 6 is first inserted so that the threaded rod 61 passes through the two through holes 4141. Then, the first insert rod 5 is installed into the other second insert hole 32 so that the threaded rod 61 aligns with the threaded hole of the first insert rod 5. By rotating the first insert rod 5, the first insert rod 5 gradually approaches the second insert rod 6. The conical surface of the first insert rod 5 contacts the edge of the through hole 4141. As the first insert rod 5 gradually descends, it can pull the connecting plate 414 back to the correct position, causing the rubber ring 44 to be squeezed and deformed until the first insert hole 31 and the second insert hole 32 are completely fixed. Both the first insert rod 5 and the second insert rod 6 are provided with limiting ring plates, and both have handles at their outer ends for easy rotation, making operation and installation convenient.

[0032] The end of the bracket 41 is provided with a limiting hole 415, and the connecting plate 414 is provided with an insert plate 4142. The insert plate 4142 is located at the end of the connecting plate 414 near the other bracket 41. The insert plate 4142 of one connecting plate 414 is inserted into the limiting hole 415 of the other bracket 41. When the insert plates 4142 and the limiting holes 415 of the two brackets 41 are inserted into each other, the two brackets 41 can support each other after the two clamping assemblies 4 are inserted into the rotating beam 3, so that the clamping assemblies 4 need to be manually supported after placement.

[0033] like Figure 3 , Figure 5 , Figure 6As shown, the other end of the clamping assembly 4 can fix and clamp the pipe fitting 101. The clamping assembly 4 includes an end plate 413, multiple guide grooves 412, multiple movable frames 42, and multiple clamping plates 43. The multiple guide grooves 412 are arranged in a ring with the end plate 413, and the multiple clamping plates 43 form a space for the annular clamping flange 102. The guide grooves 412 extend radially along the end plate 413, and the movable frames 42 can move along the guide grooves 412. The movable frames 42 include a first guide plate 421 and a fixed plate 422. 21 can move along the guide groove 412. The fixing plate 422 is located at the end of the first guide plate 421 away from the guide groove 412. The fixing plate 422 is perpendicular to the first guide plate 421. The first guide plate 421 includes a locking groove 4211. The guide groove 412 and the locking groove 4211 are fixed by bolts. Before clamping the pipe fitting 101, the clamping assembly 4 expands the multiple moving frames 42 away from the center of the end plate 413. After expansion, the flange 102 of the pipe fitting 101 is put in and all the moving frames 42 are retracted.

[0034] The clamping plate 43 is installed on the movable frame 42. The clamping plate 43 can move along the axial direction of the end plate 413. The clamping plate 43 includes a clamp 431 and a second guide plate 432. The second guide plate 432 passes through the first guide plate 421. The second guide plate 432 and the first guide plate 421 are slidably connected and can be locked by bolts. The clamp 431 can move closer to or further away from the end plate 413. When the movable frame 42 is fixed, the clamp 431 abuts against the flange 102 of the pipe fitting 101. The clamp 431 and the end plate 413 can clamp and fix the flange 102 of the pipe fitting 101. The fixed clamping plate 43 limits the flange 102 between the four clamping plates 43. The flange 102 of the pipe fitting 101 is provided with multiple screw holes. The clamp 431 is provided with threaded holes. The flange 102 is fixed by bolts passing through the threaded holes and the screw holes of the flange 102. The flange 102 can be limited in the circumferential direction to prevent the pipe fitting 101 from rotating.

[0035] This embodiment also discloses a sintering method using the aforementioned PTFE-lined pipe fitting sintering furnace, comprising the following steps:

[0036] S1. Select a clamp assembly 4 with a size corresponding to the flange 102 of the pipe fitting 101. The size of the clamp assembly 4 is required to be larger than that of the flange 102. Before the pipe fitting 101 is installed, the end plate 413 of the clamp assembly 4 should face upward. The lower end of the bracket 41 of the clamp assembly 4 should be inserted and placed on the corresponding clamp rack. The slot of the clamp rack corresponds to the size of the bracket 41 of the clamp assembly 4. The ring plate 411 of the bracket 41 supports the bracket 41. Expand the multiple movable frames 42 of the clamp assembly 4 outward and place the end of the pipe fitting 101 on the end plate 413 of the clamp assembly 4.

[0037] S2. After placing the pipe fitting 101, retract all the movable frames 42 inward and lock the movable frames 42. Move the clamping plate 43 close to the flange 102 of the pipe fitting 101. Clamp the flange 102 of the pipe fitting 101 through the clamp 431 and the end plate 413 of the clamping plate 43. Fix the clamping plate 43. Align the screw holes of the flange 102 with the threaded holes of the clamp 431 and install the screws to fix it, so that the pipe fitting 101 is completely fixed on the clamping assembly 4.

[0038] S3. Remove the clamp assembly 4 with the pipe fitting 101 installed from the clamp rack. Install the two clamp assemblies 4 into the two opposite first insertion holes 31 of the rotating beam 3, so that the insertion plates 4142 and the limiting holes 415 of the two brackets 41 are interlocked. Insert the first insertion rod 5 and the second insertion rod 6 into the two second insertion holes 32 respectively. During installation, first insert the second insertion rod 6 so that the threaded rod 61 passes through the through holes 4141 of the two connecting plates 414. Then install the first insertion rod 5 into the other second insertion hole 32 so that the threaded rod 61 aligns with the threaded hole of the first insertion rod 5. By rotating the first insertion rod 5, the first insertion rod 5 gradually approaches the second insertion rod 6. Lock the first insertion rod 5 and the second insertion rod 6 with threads to fix the two clamp assemblies 4 onto the rotating beam 3.

[0039] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A sintering furnace for PTFE-lined pipe fittings, characterized in that, The assembly includes a sintering box (1), a mounting frame (2), a rotating beam (3), and multiple clamping assemblies (4). The mounting frame (2) can be close to or away from the sintering box (1). The rotating beam (3) is rotatably mounted on the side of the mounting frame (2) close to the sintering box (1). The rotating beam (3) includes multiple first insertion holes (31) arranged along the length of the rotating beam (3). One end of the clamping assembly (4) can pass through the first insertion hole (31). The clamping assembly (4) can be fixedly mounted on the rotating beam (3). The other end of the clamping assembly (4) can fix and clamp the pipe fitting (101). The rotating beam (3) can enter the sintering box (1).

2. The PTFE-lined pipe fittings sintering furnace according to claim 1, characterized in that, The rotating beam (3) includes a first insert (5) and a second insert (6). The first insert (31) has two rows, and the two rows of the first insert (31) are located on opposite sides of the rotating beam (3). The rotating beam (3) includes a plurality of second inserts (32), which are arranged along the length direction. The second inserts (32) have two rows, and the two rows of the second inserts (32) are located on the other opposite sides of the rotating beam (3). The two clamping assemblies (4) partially overlap within the rotating beam (3). The first insert (5) and the second insert (6) pass through the two clamping assemblies (4) and are fixedly connected to each other.

3. The PTFE-lined pipe fittings sintering furnace according to claim 2, characterized in that, The clamp assembly (4) includes a bracket (41), which is partially located inside the rotating beam (3). The bracket (41) includes an annular plate (411) and a connecting plate (414). The annular plate (411) abuts against the outer wall of the rotating beam (3). The connecting plate (414) is located at one end of the bracket (41) inside the rotating beam (3). The two connecting plates (414) are stacked one on top of the other. The connecting plate (414) is provided with a through hole (4141). The first insert rod (5) passes through the two through holes (4141). The first insert rod (5) and the second insert rod (6) are threadedly fixedly connected.

4. The PTFE-lined pipe fittings sintering furnace according to claim 3, characterized in that, The end of the bracket (41) is provided with a limiting hole (415), and the connecting plate (414) is provided with an insert plate (4142). The insert plate (4142) is located at one end of the connecting plate (414) near the other bracket (41), and the insert plate (4142) of one connecting plate (414) is inserted into the limiting hole (415) of the other bracket (41).

5. The PTFE-lined pipe fittings sintering furnace according to claim 3, characterized in that, The bracket (41) is fitted with a rubber ring (44), which is fitted onto the outer wall of the bracket (41). The rubber ring (44) is installed on the side of the ring plate (411) near the rotating beam (3), and the rubber ring (44) is elastically deformable.

6. The PTFE-lined pipe fittings sintering furnace according to claim 2, characterized in that, The first insertion rod (5) has a tapered end that extends into the rotating beam (3). The second insertion rod (6) includes a threaded rod (61), which is located at the end of the second insertion rod (6) near the first insertion rod (5). The first insertion rod (5) has a threaded hole corresponding to the threaded rod (61).

7. The PTFE-lined pipe fittings sintering furnace according to claim 1, characterized in that, The clamp assembly (4) includes an end plate (413), a plurality of guide grooves (412), a plurality of movable frames (42), and a plurality of clamping plates (43). The guide grooves (412) extend radially along the end plate (413). The movable frames (42) are movable along the guide grooves (412). The clamping plates (43) are mounted on the movable frames (42) and are movable axially along the end plate (413). The clamping plates (43) include chucks (431) that are able to approach or move away from the end plate (413). The chucks (431) and the end plate (413) are able to clamp and fix the flange (102) of the pipe fitting (101).

8. The PTFE-lined pipe fittings sintering furnace according to claim 7, characterized in that, The multiple guide grooves (412) are arranged in a ring with the end plate (413), and the multiple clamping plates (43) form a space for the flange (102) to be held in a ring.

9. A PTFE-lined pipe fittings sintering furnace according to claim 7, characterized in that, The movable frame (42) includes a first guide plate (421) and a fixed plate (422). The first guide plate (421) is movable along the guide groove (412). The fixed plate (422) is located at the end of the first guide plate (421) away from the guide groove (412). The fixed plate (422) is perpendicular to the first guide plate (421). The first guide plate (421) includes a locking groove (4211). The guide groove (412) and the locking groove (4211) are fixed together by bolts. The clamping plate (43) includes a second guide plate (432). The second guide plate (432) passes through the first guide plate (421). The second guide plate (432) and the first guide plate (421) are slidably connected and can be locked by bolts.

10. A sintering method using the PTFE-lined pipe fittings sintering furnace according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Select the clamp assembly (4) corresponding to the flange (102) of the pipe fitting (101), and place the end plate (413) of the clamp assembly (4) upward. Insert the lower end of the bracket (41) of the clamp assembly (4) onto the corresponding clamp frame, expand the multiple movable frames (42) of the clamp assembly (4) outward, and place the end of the pipe fitting (101) onto the end plate (413) of the clamp assembly (4). S2. Retract all the movable frames (42) inward and lock the movable frames (42), and move the clamp (43) close to the flange (102) of the pipe fitting (101). Clamp the flange (102) of the pipe fitting (101) through the clamp (431) and end plate (413) of the clamp (43) and fix the clamp (43). S3. Install the two clamping assemblies (4) into the two opposite first insertion holes (31) of the rotating beam (3), and insert the first insertion rod (5) and the second insertion rod (6) into the two second insertion holes (32) respectively. Lock the first insertion rod (5) and the second insertion rod (6) with threads to fix the two clamping assemblies (4) on the rotating beam (3).

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