Expansion device for dry expansion of fluororubber heat shrink tube

Abstract

The utility model discloses a dry expansion device for a fluororubber heat shrink tube. The expansion device for dry expansion of the fluororubber heat shrink tube comprises a vacuum cylinder, a cooling cylinder and a sizing tube, the vacuum cylinder is connected with one end of the cooling cylinder, the sizing pipe is mounted in the vacuum cylinder and the cooling cylinder, and a cleaning mechanism is arranged at one end of the cooling cylinder; the cleaning mechanism comprises a mounting frame mounted at one end of the cooling cylinder, a gear ring is mounted on the mounting frame, and a plurality of cleaning heads are mounted on the inner side of the gear ring. According to the expansion device for dry expansion of the fluororubber heat shrink tube, the vacuum cylinder, the cooling cylinder and the sizing tube are arranged, the cleaning mechanism is installed at an outlet of the heat shrink tube, the driving motor is used for driving the gear ring to drive the cleaning head to rotate, the outer wall of the heat shrink tube is actively cleaned and dehumidified, the outer wall of the heat shrink tube is kept dry and clean, and the service life of the heat shrink tube is prolonged. And subsequent lettering on the pipe wall is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion devices, in particular to an expansion device for dry expansion of fluororubber heat shrinkable tubes. Background Art

[0002] Heat shrink tubing, also known as heat shrink tubing or heat shrink tubing, is a tubing made of special materials that can shrink and tightly wrap around an object when heated. They are widely used in insulation protection of wires and cables and sealing protection of various connectors. Heat shrink tubing is usually made of cross-linked polyolefin material, which has the characteristics of insulation, corrosion resistance and wear resistance. The inner layer of some heat shrink tubing is also coated with hot melt adhesive to provide advantages such as low melting point, waterproof sealing and high adhesion. Fluororubber heat shrink tubing is a high-performance insulation material that can not only maintain performance under extreme temperature conditions, but also has excellent tensile strength and elongation at break. These characteristics make fluororubber heat shrink tubing show good tear resistance when facing physical stress.

[0003] There are three ways to expand heat shrink tubes, namely air expansion, mold expansion and roller expansion. An existing dry expansion vacuum heat shrink tube mold device comprises a vacuum cylinder and a cooling cylinder, the vacuum cylinder comprises an upper mold cylinder and a lower mold cylinder, the arc outer ends of the upper mold cylinder and the lower mold cylinder are fixedly connected by bolts, the inner arc surfaces of the upper mold cylinder and the lower mold cylinder are arranged corresponding to the outer arc surface of the sizing tube, the interior of the upper mold cylinder and the lower mold cylinder are provided with semicircular vacuum grooves, the two vacuum grooves and the left end of the outer arc surface of the sizing tube are combined into an annular vacuum chamber, the top of the arc surface of the upper mold cylinder is provided with an exhaust pipe connected to the vacuum groove, the right end outer arc surfaces of the upper mold cylinder and the lower mold cylinder are provided with a clamping ring, the cooling cylinder comprises an upper half mold and a lower half mold, the arc outer ends of the upper half mold and the lower half mold are fixedly connected by bolts. The dry expansion vacuum heat shrink tube mold device saves production costs, reduces the waste of consumables during replacement, makes the wall thickness expansion of the heat shrink tube more uniform, improves the cooling effect, increases efficiency, and has good air tightness.

[0004] The device uses water cooling to cool the heat shrink tube after vacuum mold expansion. Although there will be no water leakage when cooling the fluororubber heat shrink tube, due to the influence of cooling water, condensed water will appear at the outlet of the sizing tube under low temperature conditions. The condensed water will adhere to the surface of the heat shrink tube, affecting the subsequent printing on the tube.

[0005] Therefore, it is necessary to provide a dry expansion device for fluororubber heat shrinkable tube to solve the above technical problems. Utility Model Content

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a dry expansion device for fluororubber heat shrinkable tubes, which can actively clean and dehumidify the outer wall of the heat shrinkable tube, so that the outer wall of the heat shrinkable tube remains dry and clean, which is conducive to subsequent printing on the tube wall.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A dry expansion device for fluororubber heat shrinkable tubes comprises: a vacuum cylinder, a cooling cylinder and a sizing tube. The vacuum cylinder is connected to one end of the cooling cylinder to form a whole. The sizing tube is installed in the vacuum cylinder and the cooling cylinder. An exhaust pipe is installed on the vacuum cylinder. An inlet and outlet pipe is installed on the cooling cylinder. A cleaning mechanism is provided at one end of the cooling cylinder. The cleaning mechanism comprises a mounting frame installed at one end of the cooling cylinder. A gear ring is rotatably installed on the mounting frame. A plurality of cleaning heads are arranged in a circular array on the inner side of the gear ring. The cleaning heads are made of a material with good water absorption. A driving motor is installed on the mounting frame. A driving gear is installed on the output shaft of the driving motor. The driving gear is meshed with the gear ring.

[0009] Preferably, a flange is installed at one end of the cooling cylinder, and the mounting frame is connected to the flange by bolts.

[0010] Preferably, an annular track is installed at one end of the mounting frame, and a plurality of rollers are installed in an annular array on the gear ring, and the rollers roll on the track.

[0011] Preferably, a transition section is provided at one end of the sizing tube, the transition section is provided at the entrance end of the heat shrink tube, and a strip-shaped exhaust slit is provided on the sizing tube.

[0012] Preferably, a gas sealing ring and two waterproof sealing rings are installed on the sizing tube. The gas sealing ring is used to seal between the end of the sizing tube and the inner cavity of the vacuum cylinder, the middle waterproof sealing ring is used to seal between the sizing tube and the vacuum cylinder and the cooling cylinder, and the end waterproof sealing ring is used to seal between the sizing tube and the cooling cylinder.

[0013] Preferably, a connecting assembly is provided between the cleaning head and the gear ring, the connecting assembly comprising a mounting tube at one end connected to the inner side of the gear ring, a sliding block and a spring are installed in the mounting tube, a push rod is installed at one end of the cleaning head, one end of the push rod is inserted into the mounting tube and connected to the sliding block.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) The utility model provides a vacuum cylinder, a cooling cylinder and a sizing tube, installs a cleaning mechanism at the outlet of the heat shrink tube, uses a driving motor to drive a gear ring to drive a cleaning head to rotate, and actively cleans and dehumidifies the outer wall of the heat shrink tube, so that the outer wall of the heat shrink tube remains dry and clean, which is conducive to subsequent printing on the tube wall;

[0016] (2) The utility model can make the diameter change of the heat shrink tube more uniform by providing a transition section at one end of the sizing tube;

[0017] (3) The utility model provides a connecting assembly between the cleaning head and the toothed ring, so that the cleaning head and the toothed ring are elastically connected, and the radial distance between the cleaning head and the toothed ring can be automatically changed, so that the cleaning head can continuously contact the heat shrink tube, thereby facilitating the cleaning of heat shrink tubes of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view structural schematic diagram of a dry expansion device for a fluororubber heat shrinkable tube provided by the utility model;

[0019] Figure 2 for Figure 1 The cross-sectional structural schematic diagram of the dry expansion device for fluororubber heat shrinkable tube shown;

[0020] Figure 3 for Figure 1 The schematic diagram of the structure of the vacuum cylinder and the cooling cylinder in the dry expansion device for the fluororubber heat shrinkable tube is shown;

[0021] Figure 4 for Figure 1 The schematic diagram of the structure of the cleaning mechanism used in the dry expansion device for fluororubber heat shrinkable tube is shown;

[0022] Figure 5 for Figure 1 The schematic diagram of the structure of the cleaning mechanism used in the dry expansion device for fluororubber heat shrinkable tube is shown;

[0023] Figure 6 for Figure 1 The schematic diagram of the structure of the mounting frame used in the dry expansion device of the fluororubber heat shrinkable tube is shown;

[0024] Figure 7 for Figure 1 The schematic diagram of the structure of the sizing tube used in the dry expansion device of the fluororubber heat shrink tube is shown;

[0025] Figure 8 for Figure 1 The diagram shown is a schematic structural diagram of a connecting assembly used in a fluororubber heat shrink tubing dry expansion device.

[0026] Among them, the names corresponding to the figure marks are: 1-vacuum cylinder, 2-cooling cylinder, 3-cleaning mechanism, 4-flange, 5-mounting frame, 6-track, 7-gear ring, 8-cleaning head, 9-driving gear, 10-driving motor, 11-roller, 12-sizing tube, 13-transition section, 14-exhaust gap, 15-gas sealing ring, 16-waterproof sealing ring, 17-mounting tube, 18-top rod, 19-sliding block, 20-spring. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0028] Embodiment 1:

[0029] like Figure 1-8 As shown, the utility model provides a dry expansion device for fluororubber heat shrinkable tube, comprising: a vacuum cylinder 1, a cooling cylinder 2 and a sizing tube 12. The vacuum cylinder 1 is connected to one end of the cooling cylinder 2 to form a whole. The sizing tube 12 is installed in the vacuum cylinder 1 and the cooling cylinder 2. An exhaust pipe is installed on the vacuum cylinder 1, and an inlet and outlet pipe is installed on the cooling cylinder 2. A cleaning mechanism 3 is provided at one end of the cooling cylinder 2. The cleaning mechanism 3 comprises a mounting frame 5 installed at one end of the cooling cylinder 2. A gear ring 7 is rotatably installed on the mounting frame 5. A plurality of cleaning heads 8 are arranged in a circular array on the inner side of the gear ring 7. The cleaning head 8 is made of a material with good water absorption, such as cotton cloth or sponge, including but not limited to these two materials. A driving motor 10 is installed on the mounting frame 5. A driving gear 9 is installed on the output shaft of the driving motor 10. The driving gear 9 meshes with the gear ring 7. When in use, the fluororubber heat shrinkable tube is moved from The sizing tube 1 is inserted into the entrance of the vacuum cylinder 1 and enters the sizing tube 12. The vacuum cylinder 1 evacuates the inside of the sizing tube 12 to expand the fluororubber heat shrink tube. The expansion will cause the fluororubber heat shrink tube to generate heat. Therefore, the heat shrink tube moves backward along the sizing tube 12 and the cooling water in the cooling cylinder 2 cools the sizing tube 12, so that the temperature of the heat shrink tube after the sizing tube 12 is rapidly reduced, thereby shaping the heat shrink tube. Then the heat shrink tube passes through the middle of the annular structure composed of multiple cleaning heads 8. At the same time, the driving motor 10 is started, driving the driving gear 9 to rotate, thereby rotating the gear ring 7 meshing with it. The rotation of the gear ring 7 drives the cleaning head 8 to rotate, and the cleaning head 8 contacts the outer wall of the heat shrink tube to clean the condensed water or impurities attached to the outer wall of the heat shrink tube. As the heat shrink tube continues to move, the entire heat shrink tube is cleaned to keep the outer wall of the heat shrink tube dry and clean.

[0030] By setting up a vacuum cylinder 1, a cooling cylinder 2 and a sizing tube 12, a cleaning mechanism is installed at the outlet of the heat shrink tube, and a driving motor 10 is used to drive the gear ring 7 to drive the cleaning head 8 to rotate, so as to actively clean and dehumidify the outer wall of the heat shrink tube, so that the outer wall of the heat shrink tube is kept dry and clean, which is conducive to the subsequent printing on the tube wall.

[0031] Embodiment 2:

[0032] like Figure 2-4 As shown, a flange 4 is installed at one end of the cooling cylinder 2, and a mounting frame 5 is connected to the flange 4 by bolts, thereby fixing the cleaning mechanism at the end of the cooling cylinder 2.

[0033] By installing the flange 4 at one end of the cooling cylinder 2 , the connection and fixation between the mounting frame 5 and the cooling cylinder 2 is facilitated.

[0034] Embodiment 3:

[0035] like Figure 4-6 As shown, an annular track 6 is installed at one end of the mounting frame 5, and a plurality of rollers 11 are installed in an annular array on the gear ring 7. The rollers 11 roll on the track 6, thereby making the gear ring 7 and the mounting frame 5 rollingly connected with less resistance.

[0036] By providing the track 6 and the roller 11 , the gear ring 7 can be supported conveniently.

[0037] Embodiment 4:

[0038] like Figure 7 As shown, a transition section 13 is provided at one end of the sizing tube 12, and the transition section 13 is provided at the entrance end of the heat shrinkable tube. A strip-shaped exhaust slit 14 is provided on the sizing tube 12. When in use, the heat shrinkable tube enters the sizing tube 12 from the transition section. Since the gas in the sizing tube 12 is drawn into the vacuum cylinder 1 from the exhaust slit, the negative pressure in the sizing tube 12 is close to vacuum. Therefore, the outer wall of the heat shrinkable tube moves along the inner wall of the sizing tube 12. In the transition section 13, the diameter of the heat shrinkable tube is gradually expanded to the fixed diameter, and the diameter change of the heat shrinkable tube is more uniform.

[0039] By providing a transition section 13 at one end of the sizing tube 12 , the diameter of the heat shrink tube can be changed more evenly.

[0040] Embodiment 5:

[0041] like Figure 2 As shown, a gas sealing ring 15 and two waterproof sealing rings 16 are installed on the sizing tube 12. The gas sealing ring 15 is used for sealing between the end of the sizing tube 12 and the inner cavity of the vacuum cylinder 1. The middle waterproof sealing ring 16 is used for sealing between the sizing tube 12 and the vacuum cylinder 1 and the cooling cylinder 2. The waterproof sealing ring 16 at the end is used for sealing between the sizing tube 12 and the cooling cylinder 2, thereby preventing air leakage and water leakage.

[0042] The provision of a gas sealing ring 15 and two waterproof sealing rings 16 can prevent air leakage and water leakage.

[0043] Embodiment 6:

[0044] like Figure 5 and Figure 8As shown, a connecting component is provided between the cleaning head 8 and the gear ring 7, and the connecting component includes a mounting tube 17 at one end connected to the inner side of the gear ring 7, a sliding block 19 and a spring 20 are installed in the mounting tube 17, and a push rod 18 is installed at one end of the cleaning head 8, and one end of the push rod 18 is inserted into the mounting tube 17 and connected to the sliding block 19. When in use, the spring 20 is in a compressed state. During the movement of the heat shrinkable tube, the up, down, left and right positions of the heat shrinkable tube are uncertain due to shaking or its own stress. Therefore, when the cleaning head 8 is away from the outer wall of the heat shrinkable tube, the compressed spring 20 extends, pushing the sliding block 19 to move toward the tube mouth, and then moving the push rod 18 to the outside of the mounting tube 17, and then pushing the cleaning head 8 close to the outer wall of the heat shrinkable tube, so that the cleaning head 8 can continuously clean the heat shrinkable tube. Similarly, when operating on heat shrinkable tubes of different diameters, this method is also applicable and can adapt to the production of heat shrinkable tubes of different specifications.

[0045] By providing a connecting component between the cleaning head 8 and the gear ring 7, the cleaning head 8 and the gear ring 7 are elastically connected, and the radial distance between the cleaning head 8 and the gear ring 7 can be automatically changed, so that the cleaning head 8 can continue to contact the heat shrink tube, which is convenient for cleaning heat shrink tubes of different specifications.

[0046] Working principle: When in use, the fluororubber heat shrink tube is inserted from the entrance of the vacuum cylinder 1 and enters the sizing tube 12. The vacuum cylinder 1 evacuates the inside of the sizing tube 12 to expand the fluororubber heat shrink tube. The expansion will cause the fluororubber heat shrink tube to heat itself. Therefore, when the heat shrink tube moves backward along the sizing tube 12, the cooling water in the cooling cylinder 2 cools the sizing tube 12, so that the temperature of the heat shrink tube after the sizing tube 12 expands is rapidly reduced, thereby shaping the heat shrink tube. Then the heat shrink tube passes through the middle of the annular structure composed of multiple cleaning heads 8. At the same time, the driving motor 10 is started, driving the driving gear 9 to rotate, thereby rotating the gear ring 7 meshing with it. The rotation of the gear ring 7 drives the cleaning head 8 to rotate. The cleaning head 8 contacts the outer wall of the heat shrink tube, cleans the condensed water or impurities attached to the outer wall of the heat shrink tube, and as the heat shrink tube continues to move, the entire heat shrink tube is cleaned to keep the outer wall of the heat shrink tube dry and clean.

Claims

1. A dry expansion device for fluororubber heat shrinkable tube, characterized in that: include: A vacuum cylinder (1), a cooling cylinder (2) and a sizing tube (12); The vacuum cylinder (1) is connected to one end of the cooling cylinder (2), the sizing tube (12) is installed in the vacuum cylinder (1) and the cooling cylinder (2), and a cleaning mechanism (3) is provided at one end of the cooling cylinder (2); The cleaning mechanism (3) comprises a mounting frame (5) mounted on one end of the cooling cylinder (2), a gear ring (7) being mounted on the mounting frame (5), a plurality of cleaning heads (8) being mounted on the inner side of the gear ring (7), a driving motor (10) being mounted on the mounting frame (5), a driving gear (9) being mounted on one end of the driving motor (10), and the driving gear (9) being meshed with the gear ring (7).

2. The dry expansion device for fluororubber heat shrinkable tube according to claim 1, characterized in that: A flange (4) is mounted on one end of the cooling cylinder (2), and the mounting frame (5) is connected to the flange (4).

3. The dry expansion device for fluororubber heat shrinkable tube according to claim 1, characterized in that: An annular track (6) is mounted on one end of the mounting frame (5), a plurality of rollers (11) are mounted on the gear ring (7), and the rollers (11) are connected to the track (6).

4. The dry expansion device for fluororubber heat shrinkable tube according to claim 1, characterized in that: One end of the sizing tube (12) is provided with a transition section (13) and an exhaust slit (14).

5. The dry expansion device for fluororubber heat shrinkable tube according to claim 1, characterized in that: A gas sealing ring (15) and two waterproof sealing rings (16) are installed on the calibrating tube (12).

6. The dry expansion device for fluororubber heat shrinkable tube according to claim 1, characterized in that: A connecting assembly is provided between the cleaning head (8) and the gear ring (7), the connecting assembly comprising a mounting tube (17) connected to the gear ring (7), a sliding block (19) and a spring (20) being installed in the mounting tube (17), a push rod (18) being installed at one end of the cleaning head (8), one end of the push rod (18) being inserted into the mounting tube (17) and connected to the sliding block (19).

Images