Quick connecting device for steam setting of plastic pipe

Abstract

The utility model relates to the technical field of plastic pipe steam setting, in particular to a plastic pipe steam setting quick connecting device which comprises a pressing clamp base, a rectangular welding nut is welded to the bottom of the pressing clamp base, a positioning and pressing assembly is arranged on the upper side of the pressing clamp base, and a connecting assembly is arranged in the pressing clamp base. The pressing assembly comprises a pressing clamp pressing plate, a pressing clamp locking handle, a positioning end support and a hinge shaft. Through the arrangement of the positioning and pressing assembly, the phenomenon that the pipe is heated to extend and pop out of the mold after being introduced into steam is solved, and the product percent of pass is greatly improved; by matching with the use of the connecting assembly, good thermal high-pressure sealing is realized, and the problems of leakage and leakage are solved; meanwhile, unstable product shaping caused by drop of steam pressure and temperature due to leakage and leakage is avoided, so that the product percent of pass is greatly improved; the method is easy to popularize and apply and has great practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe steam shaping, in particular to a plastic pipe steam shaping quick connection device. Background Art

[0002] The plastic pipe steam setting jig is a device that clamps a plastic pipe such as a nylon pipe from a straight pipe state into a jig of a specified curved shape, heats and softens it with high-temperature and high-pressure steam, and then quickly cools it with cold water, thereby causing the plastic pipe material molecules to crystallize and produce plastic deformation.

[0003] When using steam and cold water to shape plastic pipes, in order to save energy to the greatest extent, it is generally adopted to circulate steam and cold water through the inside of the plastic pipe for heat exchange. Therefore, at both ends of the shaping jig, the plastic pipe needs to be quickly connected to the water source and steam source to achieve fluid conduction and switching;

[0004] In the prior art, pneumatic standard parts, stainless steel quick-connect joints or sleeve-type connection joints are generally used. The end of the plastic pipe is inserted into the sleeve joint. A supporting liner is provided inside the sleeve and a wrapping sleeve is provided outside.

[0005] However, the defects of the prior art are as follows:

[0006] 1. Poor sealing: The first factor is that the diameter of the plastic pipe will have dimensional errors during the extrusion production process. The control tolerance of the inner and outer diameters and wall thickness of general automotive nylon pipe products is around ±0.15mm. When the product diameter is at the lower deviation, the sealing core and the inner wall of the pipe are over-fitted, which can achieve sealing. When the product inner diameter is close to the upper deviation, the sealing core and the product inner diameter are clearance fit, so it is impossible to achieve sealing of high-pressure steam, resulting in steam leakage. The second factor is that the pipe expands after being heated and contracts rapidly after being cooled by cold water. The rapid change in pipe size causes water leakage.

[0007] 2. Indentation: After the plastic pipe passes through high-pressure steam, the pipe wall absorbs heat and softens. Under the action of the weighing core or the external pressure clamp, the softened pipe is converted from its own elastic deformation to plastic deformation, thereby generating indentations. As a result, the produced product needs to cut off the end with the indentation before it can be used. For this reason, we have proposed a plastic pipe steam shaping quick connection device to solve the above problem. Utility Model Content

[0008] The purpose of the utility model is to provide a plastic pipe steam shaping quick connection device to solve the problem of poor product sealing proposed in the above background technology, thereby causing leakage; and the problem of indentation caused by converting the elastic deformation of the product itself into plastic deformation.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a quick-connect device for steam shaping of plastic pipes, comprising a clamp base, a rectangular welding nut welded to the bottom of the clamp base, a positioning and clamping assembly provided on the upper side of the clamp base, and a connecting assembly provided inside the clamp base;

[0010] The clamping assembly includes a clamp pressure plate, a clamp locking handle, a positioning end bracket and a hinge shaft; two sets of hinge shafts are installed at the front and rear ends of the clamp base, the outer surface of one set of hinge shafts is rotatably connected to the clamp pressure plate, and the outer surface of the other set of hinge shafts is rotatably connected to the clamp locking handle, and a positioning end bracket is welded to the left side of the clamp base;

[0011] The connecting assembly includes a positioning end sealing joint, a silicone sleeve compression hoop, a protective spring and a transparent silicone sleeve. The positioning end sealing joint is arranged inside the pressure clamp base, the silicone sleeve compression hoop is arranged on the outside of the positioning end sealing joint, a transparent silicone sleeve is arranged on the right side of the silicone sleeve compression hoop, and a protective spring is arranged at the right end of the positioning end sealing joint.

[0012] Preferably, the pressure plate of the pressure clamp is arc-shaped and has two protrusions on the outer surface. The inner side of the pressure clamp locking handle is provided with a groove that is compatible with the pressure plate of the pressure clamp. The positioning end bracket is provided with a card slot that is compatible with the silicone sleeve tightening hoop and the transparent silicone sleeve.

[0013] Preferably, the transparent silicone sleeve is screwed to the shoulder of the positioning end sealing joint, the silicone sleeve clamp is buckled or screwed onto the positioning end sealing joint, and covers and presses onto the transparent silicone sleeve, and the protective spring is screwed to the right side of the positioning end sealing joint.

[0014] Preferably, a fixing groove is provided at the bottom of the pressure clamp base, a pressure clamp sliding guide rod is installed in the fixing groove, a locking screw is installed in the rectangular welding nut, and the locking screw is located directly below the pressure clamp sliding guide rod.

[0015] Preferably, a connecting groove is provided at the bottom of the positioning end bracket, and the diameter of the connecting groove is adapted to the sliding guide rod of the pressure clamp.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model solves the problem of the pipe extending and popping out of the mold due to heat after the steam is introduced into the pipe by setting a positioning and pressing component, thereby greatly improving the product qualification rate; combined with the use of the connecting component, it achieves a good thermal and high-pressure seal and solves the problem of leakage; at the same time, it also avoids the unstable product shaping caused by the drop in steam pressure and temperature due to leakage, thereby greatly improving the product qualification rate; it is easy to promote and apply, and has great practical value.

[0018] 2. The utility model has a simple structure and is easy to operate through the setting of the connecting components; it realizes indentation-free processing on the product surface, and there is no need to cut the product to length, thereby saving a lot of raw materials and reducing the head cutting process, greatly improving production efficiency; and effectively preventing the semi-finished plastic pipes used from being unqualified due to incorrect cutting length, thereby greatly improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic front view of the structure of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model in an expanded state;

[0022] Figure 3 This is an exploded view of the structure of the positioning and pressing assembly of the utility model;

[0023] Figure 4 This is an exploded view of the structure of the connection component of the present invention.

[0024] In the figure: 1. Pressing clamp base; 2. Pressing clamp pressure plate; 3. Pressing clamp locking handle; 4. Positioning end bracket; 5. Hinge shaft; 6. Pressing clamp sliding guide rod; 7. Rectangular welding nut; 8. Locking screw; 9. Positioning end sealing joint; 10. Silicone sleeve tightening hoop; 11. Protective spring; 12. Transparent silicone sleeve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-4 The utility model provides an embodiment: a plastic pipe steam shaping quick connection device, comprising a clamp base 1, a rectangular welding nut 7 is welded to the bottom of the clamp base 1, a positioning and pressing component is provided on the upper side of the clamp base 1, and a connecting component is provided inside the clamp base 1;

[0027] The clamping assembly includes a clamp pressing plate 2, a clamp locking handle 3, a positioning end bracket 4 and a hinge shaft 5; two sets of hinge shafts 5 are installed at the front and rear ends of the clamp base 1, the outer surface of one set of hinge shafts 5 is rotatably connected to the clamp pressing plate 2, and the outer surface of the other set of hinge shafts 5 is rotatably connected to the clamp locking handle 3, and the positioning end bracket 4 is welded to the left side of the clamp base 1;

[0028] The connecting assembly includes a positioning end sealing joint 9, a silicone sleeve compression hoop 10, a protective spring 11 and a transparent silicone sleeve 12. The positioning end sealing joint 9 is provided in the pressure clamp base 1, the silicone sleeve compression hoop 10 is provided on the outside of the positioning end sealing joint 9, the transparent silicone sleeve 12 is provided on the right side of the silicone sleeve compression hoop 10, and the right end of the positioning end sealing joint 9 is provided with a protective spring 11;

[0029] This device solves the problem of poor product sealing, which causes leakage, and the problem of converting the product's own elastic deformation into plastic deformation, which causes indentation, by setting up positioning and pressing components and connecting components.

[0030] Furthermore, the pressure clamp plate 2 is arc-shaped and has two protrusions on its outer surface. The inner side of the pressure clamp lock handle 3 is provided with a groove adapted to the pressure clamp plate 2. The positioning end bracket 4 is provided with a slot adapted to the silicone sleeve clamping hoop 10 and the transparent silicone sleeve 12. Figure 3 As shown, the structure is used to place the silicone sleeve clamping hoop 10 in the positioning groove of the positioning end bracket 4 of the positioning clamping assembly through the coordinated use of the clamp pressure plate 2 and the clamp locking handle 3, and fasten the clamp pressure plate 2 to form a closed circle with the clamp base 1, forming a circumferential wrapping of the transparent silicone sleeve 12, and locking the clamp locking handle 3; by squeezing the transparent silicone sleeve 12, a clamping force is formed on the plastic pipe product, and the positioning end sealing joint 9 forms an over-fitting support for the plastic pipe product inside the pipe end.

[0031] Furthermore, the transparent silicone sleeve 12 is screwed to the shoulder of the positioning end sealing joint 9, the silicone sleeve clamping hoop 10 is buckled or screwed to the positioning end sealing joint 9, and covers and presses the transparent silicone sleeve 12, and the spring 11 is screwed to the right side of the positioning end sealing joint 9. Figure 4 As shown, this structure is used to avoid indentations by setting the transparent silicone sleeve 12 and the silicone sleeve compression hoop 10.

[0032] Furthermore, a fixing groove is provided at the bottom of the pressure clamp base 1, in which a pressure clamp sliding guide rod 6 is installed, and a locking screw 8 is installed in the rectangular welding nut 7, and the locking screw 8 is located directly below the pressure clamp sliding guide rod 6. Figure 1 As shown, this structure is used to facilitate connection with other devices by sliding the guide rod 6 through the pressure clamp.

[0033] Furthermore, a connecting groove is provided at the bottom of the positioning end bracket 4, and the diameter of the connecting groove is adapted to the sliding guide rod 6 of the pressure clamp. Figure 3 As shown, the structure is used to position the positioning and clamping assembly by positioning the clamp sliding guide rod 6 at the bottom of the clamp base 1 and the positioning end bracket 4.

[0034] Working principle: When used, Figure 1 As shown, first connect one end of the pressing clamp sliding guide rod 6 to the steam setting mold; install the positioning and pressing assembly on the pressing clamp sliding guide rod 6, adjust the positioning position according to the product data and tighten the locking screw 8, install the plastic pipe steam setting quick connection device at both ends of the mold, and then complete the mold assembly; then connect the tail end interface of the connection assembly to the steam pipe;

[0035] The specific implementation steps are as follows: Figure 1 and Figure 4 As shown, open the pressure clamp plate 2 and the pressure clamp locking handle 3 of the positioning and clamping unit, then insert the plastic tube into the connecting assembly spring 11, and push it to the limit of the positioning end sealing joint 9. Through the transparent silicone sleeve 12, you can directly observe whether the plastic tube is installed in place; install the connecting unit after the plastic tube is installed to the positioning and clamping assembly, so that the silicone sleeve clamping hoop 10 is placed in the positioning groove of the positioning end bracket 4 of the positioning and clamping assembly, buckle the pressure clamp plate 2, so that the pressure clamp plate 2 and the pressure clamp base 1 form a closed circle, forming a circumferential wrap around the transparent silicone sleeve 12, and lock the pressure clamp locking handle 3; by squeezing the transparent silicone sleeve 12, a clamping force is formed on the plastic tube product, and the positioning end sealing joint 9 forms an over-fitting support for the plastic tube product inside the tube end, thereby completing the product end positioning;

[0036] like Figure 1 and Figure 2 As shown, the plastic tube product lined with the spring lining core 11 is installed into the mold according to its shape, and the positioning end sealing joint 9 of the connecting unit at the other end is inserted into the tail end of the plastic tube product. The transparent silicone sleeve 12 is used to judge whether the plastic tube product is installed in place, and the positioning and clamping unit placed at the tail end of the mold can be installed into the positioning groove of the positioning end bracket 4 of the positioning and clamping assembly. If it is out of tolerance, the length of the plastic tube product used is qualified; otherwise, it is out of tolerance; buckle the clamp pressure plate 2 so that the clamp pressure plate 2 and the clamp base 1 form a closed circle, forming a circumferential wrap around the transparent silicone sleeve 12, and lock the clamp lock handle 3 to complete the product pipe assembly;

[0037] like Figure 1 and Figure 4As shown, the locking screw 8 of the positioning and clamping assembly at the positioning end is locked, and the locking screw 8 of the positioning and clamping assembly at the tail end remains open. When steam and cold water are introduced, the plastic pipe product forms axial extension and contraction due to thermal expansion and contraction, and the tail end positioning and clamping assembly slides on the sliding guide rod 6 of the pressure clamp as the pipe expands and contracts, thereby reducing the axial force on the plastic pipe and avoiding the product from popping out of the mold due to extrusion in the middle while the two ends are fixed after extension. The above is the entire working principle of the utility model.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A quick-connect device for steam-forming plastic pipes, characterized by: It comprises a pressure clamp base (1), a rectangular welding nut (7) is welded to the bottom of the pressure clamp base (1), a positioning and clamping assembly is provided on the upper side of the pressure clamp base (1), and a connecting assembly is provided inside the pressure clamp base (1); The clamping assembly comprises a clamp pressure plate (2), a clamp locking handle (3), a positioning end bracket (4) and a hinge shaft (5); two sets of hinge shafts (5) are installed at the front and rear ends of the clamp base (1); the outer surface of one set of hinge shafts (5) is rotatably connected to the clamp pressure plate (2), and the outer surface of the other set of hinge shafts (5) is rotatably connected to the clamp locking handle (3); and the positioning end bracket (4) is welded to the left side of the clamp base (1); The connection assembly comprises a positioning end sealing joint (9), a silicone sleeve compression hoop (10), a protection spring (11) and a transparent silicone sleeve (12); the positioning end sealing joint (9) is arranged inside the pressure clamp base (1); the silicone sleeve compression hoop (10) is arranged on the outside of the positioning end sealing joint (9); the transparent silicone sleeve (12) is arranged on the right side of the silicone sleeve compression hoop (10); and the protection spring (11) is arranged at the right end of the positioning end sealing joint (9).

2. The quick-connect device for steam-setting plastic pipes according to claim 1, characterized in that: The pressure clamp plate (2) is arc-shaped and has two protrusions on its outer surface. The inner side of the pressure clamp lock handle (3) is provided with a groove that matches the pressure clamp plate (2). The positioning end bracket (4) is provided with a slot that matches the silicone sleeve clamping hoop (10) and the transparent silicone sleeve (12).

3. The plastic pipe steam shaping quick connection device according to claim 1, characterized in that: The transparent silicone sleeve (12) is screwed onto the shaft shoulder of the positioning end sealing joint (9), the silicone sleeve clamping hoop (10) is buckled or screwed onto the positioning end sealing joint (9), and covers and presses onto the transparent silicone sleeve (12), and the protective spring (11) is screwed onto the right side of the positioning end sealing joint (9).

4. The plastic pipe steam shaping quick connection device according to claim 1, characterized in that: A fixing groove is provided at the bottom of the pressure clamp base (1), a pressure clamp sliding guide rod (6) is installed in the fixing groove, a locking screw (8) is installed in the rectangular welding nut (7), and the locking screw (8) is located directly below the pressure clamp sliding guide rod (6).

5. The plastic pipe steam shaping quick connection device according to claim 1, characterized in that: A connecting groove is provided at the bottom of the positioning end bracket (4), and the diameter of the connecting groove is adapted to the sliding guide rod (6) of the pressure clamp.

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