Electric heating ring device easy to assemble and disassemble

Abstract

The utility model relates to an easy-to-assemble and easy-to-disassemble electric heating ring device, which comprises a metal cylinder with a contraction notch and an electric heating wire wound on the metal cylinder, and is characterized in that the inner side wall or the outer side wall of the metal cylinder is provided with a strip-shaped bent pit slot extending towards the directions of the two ends of the metal cylinder; and the strip-shaped bending pit slots are arranged in a manner of penetrating through or not penetrating through the end surface of the metal cylinder. Due to the fact that the strip-shaped bending pit grooves are formed in the metal cylinder body, under the condition that the thickness of the wall of the metal cylinder body is not changed, the structural strength of the metal cylinder body is weakened, force needed by bending and narrowing of the metal cylinder body is smaller, bending and narrowing deformation is easier, the strip-shaped bending pit grooves can be used for releasing bending and stretching stress, rebounding is not prone to occurring, and the service life of the metal cylinder body is prolonged. Therefore, the metal cylinder can be quickly held and fixed or separated from the hot runner pipe, so that the electric heating ring device is very convenient to mount, dismount and maintain.

Description

Technical Field

[0001] The utility model relates to the field of hot runner heating accessories, in particular to an electric heating ring device. Background Art

[0002] At present, most of the electric heaters used on hot runner tubes are made into sleeve structures, which are fixed on the hot runner tubes by means of sleeves to achieve heat conduction. For example, the applicant has submitted a patent scheme with patent number 201220334766.X and the name of "A simple electric heating ring device" to the Patent Office of the State Intellectual Property Office of China. The scheme mainly includes a metal cylinder with an expansion joint and a heating wire embedded in the metal cylinder. In actual installation, the inner diameter of the metal cylinder usually needs to be larger than the outer diameter of the hot runner tube so that the metal cylinder can be conveniently sleeved on the hot runner tube. Then, after the sleeve is completed, it is necessary to use tools to continuously knock the metal cylinder to make the metal cylinder bend, narrow and deform, so that the metal cylinder is tightly fixed on the hot runner tube. Finally, the hot runner tube can be heated by the electric heating wire. However, the electric heating ring device of this scheme still has the following shortcomings in the actual installation and disassembly application process:

[0003] First, since the metal cylinder needs to be embedded and fixed with the heating wire, the wall thickness of the metal cylinder is usually thicker and the structural strength is higher. The force required to squeeze the metal cylinder to narrow it is also greater. In addition, there is no structure on the metal cylinder for releasing the bending and expansion stress. When the metal cylinder is bent, narrowed and deformed, the bending and expansion stress generated by it can easily cause it to rebound, making it difficult for the metal cylinder to bend and narrow into place quickly, so that the metal cylinder cannot be quickly clamped and fixed on the hot runner tube, and it is necessary to constantly knock and adjust, which is very time-consuming and labor-intensive, making the set fixation of the electric heating ring device still inconvenient.

[0004] Secondly, since the metal cylinder is usually made of copper, its texture is relatively soft and its thermal expansion and contraction changes greatly. Therefore, after long-term heating work, its shape state will change from passive clamping to active clamping and fixing on the hot runner tube. In addition, since the wall thickness of the metal cylinder is usually thicker and there is no structure on the metal cylinder for releasing bending stress, when the electric heating ring device is damaged and needs to be replaced, it is difficult to pry apart the metal cylinder that is clamped and fixed on the hot runner tube. Its disassembly is also very time-consuming, labor-intensive and inconvenient.

[0005] Therefore, it is necessary to design an electric heating ring device that is easy to install and disassemble. Utility Model Content

[0006] The purpose of the present utility model is to solve the above problems and deficiencies, and provide an easily installed and disassembled electric heating coil device. By arranging strip-shaped bending pits on the metal cylinder body, the structural strength of the metal cylinder body can be weakened without changing the wall thickness of the metal cylinder body, making it easier to bend and narrow with less force, and the strip-shaped bending pits can be used to release bending and telescopic stress and are not prone to rebound, so as to quickly hold and fix or disengage from the hot runner tube the metal cylinder body, thus making the installation, disassembly and maintenance of the electric heating coil device very convenient.

[0007] The technical solution of the present utility model is realized as follows: An easily installed and disassembled electric heating coil device includes a metal cylinder body with a contraction notch and an electric heating wire wound around the metal cylinder body. The feature is that strip-shaped bending pits extending towards both ends of the metal cylinder body are arranged on the inner side wall or the outer side wall of the metal cylinder body, and the strip-shaped bending pits are arranged in a way that they penetrate or do not penetrate the end faces of the metal cylinder body.

[0008] Preferably, both ends of the strip-shaped bending pits penetrate the two end faces of the metal cylinder body respectively; or both ends of the strip-shaped bending pits do not penetrate the two end faces of the metal cylinder body respectively; or one end of the strip-shaped bending pits penetrates and the other end does not penetrate the end face of the metal cylinder body.

[0009] Preferably, a surrounding wire groove for embedding the electric heating wire is arranged on the inner side wall or the outer side wall of the metal cylinder body.

[0010] Preferably, the surrounding wire groove and the strip-shaped bending pits are arranged on the inner side wall or the outer side wall of the metal cylinder body in a unified manner.

[0011] Preferably, the strip-shaped bending pits and the surrounding wire groove are arranged in a mutually penetrating manner, and the bottom of the strip-shaped bending pits is flush with the bottom of the surrounding wire groove.

[0012] Preferably, the present utility model further includes a tightening component. The tightening component includes a C-shaped cylinder body and a locking slider. A contraction gap is formed at the opening of the C-shaped cylinder body, and convex ear parts are respectively arranged on the C-shaped cylinder body on both sides of the contraction gap. A conical card slot is arranged on the locking slider, and the locking slider is installed on the C-shaped cylinder body by sliding and sleeving on the two convex ear parts through the conical card slot; the C-shaped cylinder body is sleeved on the metal cylinder body.

[0013] Preferably, claw pieces for clamping and fixing the metal cylinder body are respectively arranged at both ends of the C-shaped cylinder body.

[0014] Preferably, the outer ends of the two convex ear parts are bent away from the contraction gap, and buckle slots are respectively arranged on the two groove walls in the width direction of the conical card slot, and the two buckle slots are respectively slidably buckled on the two convex ear parts.

[0015] Preferably, the lug portion is a strip-shaped lug extending along the side of the shrinkage gap.

[0016] Preferably, the two lug portions are arranged in an "8" relationship.

[0017] Beneficial effects of the utility model: The utility model can weaken the structural strength of the metal cylinder under the condition that the wall thickness of the metal cylinder remains unchanged by setting the strip-shaped bending pits, so that the force required to squeeze the metal cylinder to narrow is smaller, so that the metal cylinder can be bent, narrowed and deformed more easily. In addition, by setting the strip-shaped bending pits, during the bending process, it can be used to release the bending and stretching stress, and it is not easy to rebound, so that the metal cylinder can be quickly clamped and fixed on the hot runner pipe, which is very time-saving and labor-saving, and greatly improves the convenience of installing the electric heating coil device. At the same time, when the electric heating coil device is damaged and needs to be replaced, even if the shape state of the metal cylinder changes, it is changed from passive clamping and fixing to active clamping and fixing on the hot runner pipe, and the metal cylinder can be easily broken apart, so that the electric heating coil device can be easily disassembled from the hot runner pipe, which is very time-saving and labor-saving, and greatly improves the convenience of disassembly, replacement and maintenance of the electric heating coil device. In addition, by setting the strip-shaped bending pits to penetrate the end surface of the metal cylinder, the bending, narrowing and deformation of the metal cylinder can be made easier. Alternatively, by providing the strip-shaped bending groove on the end surface that does not penetrate the metal cylinder, while weakening the structural strength of the metal cylinder and achieving easy bending, narrowing and deformation, the end portion also has very good structural strength, which not only makes it easy to install and disassemble, but also makes its overall structural strength better, so that it can be more firmly fixed on the hot runner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the electric heating ring device in the utility model.

[0019] Figure 2 It is a schematic diagram of the disassembled structure of the electric heating ring device in the utility model.

[0020] Figure 3 It is a schematic structural diagram of the metal cylinder scheme 1 in the present utility model in the unfolded state.

[0021] Figure 4 It is a schematic structural diagram of the second metal cylinder scheme in the present utility model in the unfolded state.

[0022] Figure 5 It is a schematic structural diagram of the metal cylinder scheme 3 in the present utility model in the unfolded state.

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the C-shaped cylinder in the utility model. DETAILED DESCRIPTION

[0024] As Figure 1 shown in Figure 2 Fig. 1, a kind of easily installed and disassembled electric heating coil device described in the utility model includes a metal cylinder body 1 with a shrinkage notch 10 and an electric heating wire 2 wound around the metal cylinder body 1. In order to achieve the purpose proposed by the utility model, strip-shaped bending grooves 11 extending towards both ends of the metal cylinder body 1 are arranged on the inner side wall or the outer side wall of the metal cylinder body 1, and the strip-shaped bending grooves 11 penetrate or do not penetrate the end faces of the metal cylinder body 1. By arranging the strip-shaped bending grooves 11 on the metal cylinder body 1, the structural strength of the metal cylinder body 1 can be weakened without changing the wall thickness of the metal cylinder body 1, making the force required for its bending and narrowing smaller, and the bending and narrowing deformation easier. Moreover, the strip-shaped bending grooves 11 can be used to release the bending and telescopic stress and are not easy to rebound, so as to quickly hold and fix or separate from the hot runner tube the metal cylinder body 1, thereby making the installation, disassembly and maintenance of the electric heating coil device very convenient.

[0025] In the actual application process, the number of the strip-shaped bending grooves 11 can be 1 or multiple, and the corresponding number of strip-shaped bending grooves 11 can be set according to the actual application requirements.

[0026] In the actual application process, the utility model gives 3 implementation schemes of the strip-shaped bending grooves 11: Scheme 1, as Figure 3 shown in Figure 4 Fig. 2, both ends of the strip-shaped bending grooves 11 do not penetrate the two end faces of the metal cylinder body 1 respectively. Scheme 2, as Figure 4 shown in Figure 5 Fig. 3, both ends of the strip-shaped bending grooves 11 penetrate the two end faces of the metal cylinder body 1 respectively. Scheme 3, as Figure 5 shown in Fig. 4, one end of the strip-shaped bending grooves 11 penetrates and the other end does not penetrate the end face of the metal cylinder body 1. By making the strip-shaped bending grooves 11 penetrate the end faces of the metal cylinder body 1, the bending and narrowing deformation of the metal cylinder body 1 can be made easier. And by making the strip-shaped bending grooves 11 not penetrate the end faces of the metal cylinder body 1, while weakening the structural strength of the metal cylinder body 1 and realizing easy bending and narrowing deformation, the end parts also have very good structural strength, not only making it have the functions of easy installation and easy disassembly, but also making its overall structural strength better, so that it can be held and fixed on the hot runner tube more firmly.

[0027] For the convenience of installing and fixing the electric heating wire 2, as Figure 2 shown in Figure 3 Fig. 5, a surrounding wire groove 12 for embedding the electric heating wire 2 is arranged on the inner side wall or the outer side wall of the metal cylinder body 1. In this way, the electric heating wire 2 can be quickly installed and positioned in the surrounding wire groove 12, improving the convenience of installing the electric heating wire 2.

[0028] As Figure 3As shown, the surrounding wire groove 12 and the strip-shaped bent pit groove 11 are uniformly arranged on the inner side wall or the outer side wall of the metal cylinder 1. By arranging the surrounding wire groove 12 and the strip-shaped bent pit groove 11 on the same side wall, the space utilization can be made more reasonable, the structure can be more compact, and the inner side wall and the outer side wall of the metal cylinder 1 will not be penetrated and connected. Thus, the metal cylinder 1 not only has the functions of easy installation and disassembly, but also has relatively excellent overall structural strength, ensuring that the bent part will not break. In the actual application process, the surrounding wire groove 12 and the strip-shaped bent pit groove 11 can be arranged on the inner side wall of the metal cylinder 1 together, or the surrounding wire groove 12 and the strip-shaped bent pit groove 11 can be arranged on the outer side wall of the metal cylinder 1 together. Preferably, the surrounding wire groove 12 and the strip-shaped bent pit groove 11 are arranged on the inner side wall of the metal cylinder 1 together. In this way, the electric heating wire 2 can be in direct contact with the hot runner tube to reduce heat energy loss.

[0029] As Figure 3 shown, the strip-shaped bent pit groove 11 and the surrounding wire groove 12 are arranged to be mutually penetrating, and the bottom of the strip-shaped bent pit groove 11 is flush with the bottom of the surrounding wire groove 12. Through such a structural design, the processing and production of the strip-shaped bent pit groove 11 and the surrounding wire groove 12 are made easier, and it will not hinder the installation of the electric heating wire 2. Moreover, the overall structural strength of the metal cylinder 1 is relatively excellent, and the bent part will not break.

[0030] In order to enable the metal cylinder 1 to always be tightly held and fixed on the hot runner tube, as Figure 1 shown in Figure 2 the figure, the present utility model further includes a tightening component 3. The tightening component 3 includes a C-shaped cylinder 31 and a locking slider 32. A contraction gap 311 is formed at the opening of the C-shaped cylinder 31, and convex ear parts 312 are respectively arranged on the C-shaped cylinder 31 on both sides of the contraction gap 311. A conical card slot 321 is arranged on the locking slider 32. The locking slider 32 is slidably sleeved on the two convex ear parts 312 through the conical card slot 321 and installed on the C-shaped cylinder 31, so as to adjust the width of the contraction gap 311 by sliding the locking slider 32 to make the C-shaped cylinder 31 perform a bending and narrowing deformation action; the C-shaped cylinder 31 is sleeved on the metal cylinder 1. In this way, by sliding the locking slider 32, different widths of the conical card slot 321 can act on the two convex ear parts 312, so that the two convex ear parts 312 can move closer to each other through the conical card slot 321, thereby adjusting the width of the contraction gap 311 to make the C-shaped cylinder 31 perform a bending and narrowing deformation action, so as to tightly hold the metal cylinder 1 and prevent the metal cylinder 1 from loosening from the hot runner tube. Moreover, through the sliding operation, locking and unlocking are made easier, and the convenience and efficiency of installation and disassembly are very good, thereby effectively improving the convenience of installation, disassembly and maintenance of the electric heating coil device.

[0031] AsFigure 6 As shown, claw pieces 313 for clamping and fixing the metal cylinder 1 are respectively provided at both ends of the C-shaped cylinder body 31. Through such a structural design, the metal cylinder 1 can be limited in the C-shaped cylinder body 31 to prevent the metal cylinder 1 from loosening from the C-shaped cylinder body 31. During actual application, as Figure 6 shown, a plurality of claw pieces 313 can be respectively arranged at the upper and lower ends of the C-shaped cylinder body 31, and the plurality of claw pieces 313 are respectively arranged in a circumferential arrangement along the circumferential edge of the C-shaped cylinder body 31. Such a limitation is more reliable.

[0032] As Figure 2 shown in Figure 6 , the outer ends of both convex ear parts 312 are bent away from the contraction gap 311, and buckle grooves 322 are respectively formed on the two groove walls in the width direction of the conical card slot 321, and the two buckle grooves 322 are respectively slidably buckled on the two convex ear parts 312. This can make the assembly of the locking slider 32 and the convex ear part 312 more stable and reliable, thereby helping to further improve the stability and reliability of the installation and positioning of the locking slider 32, and then can play a very reliable locking role.

[0033] As Figure 6 shown, the convex ear part 312 is a strip-shaped convex ear extending along the side of the contraction gap 311. By adopting the strip-shaped convex ear, the convex ear part 312 can have higher structural strength, thereby helping to further improve the reliability of locking.

[0034] As Figure 6 shown, the two convex ear parts 312 are arranged in an eight-character relationship. The two convex ear parts 312 arranged in this way can better match the conical card slot 321, thereby increasing the interaction amount between the conical card slot 321 and the two convex ear parts 312, and then helping to further improve the stability and reliability of the locking of the locking slider 32.

Claims

1. An easily assembled and disassembled electric heating ring device, comprising a metal cylinder (1) with a shrinkage notch (10), and an electric heating wire (2) wound around the metal cylinder (1), characterized in that: The inner wall or the outer wall of the metal cylinder (1) is provided with a strip-shaped bending groove (11) extending towards the two ends of the metal cylinder (1), and the strip-shaped bending groove (11) is arranged to penetrate or not penetrate the end surface of the metal cylinder (1).

2. The easily assembled and disassembled electric heating ring device according to claim 1, characterized in that: The two ends of the strip-shaped bending groove (11) are arranged as two end surfaces that respectively penetrate the metal cylinder (1); or the two ends of the strip-shaped bending groove (11) are arranged as two end surfaces that respectively do not penetrate the metal cylinder (1); or the two ends of the strip-shaped bending groove (11) are arranged as end surfaces with one end penetrating and the other end not penetrating the metal cylinder (1).

3. The easily assembled and disassembled electric heating ring device according to claim 1, characterized in that: The inner wall or the outer wall of the metal cylinder (1) is provided with a surrounding wire groove (12) in which the power supply heating wire (2) is embedded.

4. The easily assembled and disassembled electric heating ring device according to claim 3, characterized in that: The surrounding wire groove (12) and the strip-shaped bending groove (11) are uniformly arranged on the inner wall or the outer wall of the metal cylinder (1).

5. The easily assembled and disassembled electric heating ring device according to claim 4, characterized in that: The strip-shaped bending groove (11) and the surrounding wire groove (12) are arranged to interpenetrate each other, and the groove bottom of the strip-shaped bending groove (11) and the groove bottom of the surrounding wire groove (12) are arranged to be flush with each other.

6. The easily assembled and disassembled electric heating ring device according to claim 1, characterized in that: The invention also comprises a clamping component (3), the clamping component (3) comprising a C-shaped cylinder (31) and a locking slider (32); a shrinkage gap (311) is formed at the opening of the C-shaped cylinder (31), and lugs (312) are respectively provided on the C-shaped cylinder (31) at both sides of the shrinkage gap (311); a conical groove (321) is provided on the locking slider (32); the locking slider (32) is installed on the C-shaped cylinder (31) by slidingly clamping on the two lugs (312) through the conical groove (321); and the C-shaped cylinder (31) is sleeved on the metal cylinder (1).

7. The easily assembled and disassembled electric heating ring device according to claim 6, characterized in that: Claws (313) for clamping and fixing the metal cylinder (1) are respectively provided at both ends of the C-shaped cylinder (31).

8. The easily assembled and disassembled electric heating ring device according to claim 6, characterized in that: The outer ends of the two lugs (312) are bent in a direction away from the shrinkage gap (311), and buckle grooves (322) are respectively provided on two groove walls in the width direction of the tapered slot (321), and the two buckle grooves (322) are respectively slidably buckled on the two lugs (312).

9. The easily assembled and disassembled electric heating ring device according to claim 8, characterized in that: The lug portion (312) is a strip-shaped lug extending along the side of the shrinkage gap (311).

10. The easily assembled and disassembled electric heating ring device according to claim 9, characterized in that: The two lug portions (312) are arranged in an "eight" relationship.

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