Infrared welding forming equipment for plastic inner container of hydrogen storage cylinder

Abstract

The invention discloses infrared welding forming equipment for a plastic inner container of a hydrogen storage cylinder. The infrared welding forming equipment is characterized by comprising a base, a first translation assembly, a second translation assembly, a first welding press-fit air cylinder, a second welding press-fit air cylinder, a first clamping assembly, a second clamping assembly, an infrared heating assembly, an upper side panel and a supporting roller assembly. According to the equipment disclosed by the invention, the circumferential array infrared lamp tubes can dynamically rotate during heating, and the required stroke for placing and withdrawing the lamp tubes is shortened, so that the heating uniformity of the end surface during welding can be improved, and the switching time of heating and pressure applying can be shortened; due to the fact that the stroke of the opening and closing control air cylinder can be adjusted, the radial heat source irradiation area of the infrared lamp tube is adjusted, welding of liners of different sizes or with size deviation can be rapidly adapted, the equipment cost is reduced, and the production efficiency is improved. Due to the elasticity of the clamp spring in the clamping assembly, the clamp spring rubber pad is in close contact with the plastic inner container, stable clamping of the plastic inner container can be achieved, welding pressure is evenly transmitted to the welding end face, and the welding quality is improved.

Description

Technical Field

[0001] The invention relates to non-metallic material processing equipment, in particular to infrared welding forming equipment for a plastic liner of a hydrogen storage bottle. Background Art

[0002] High-pressure Type IV hydrogen storage bottles have become an important part of hydrogen energy research and development and application due to their light weight, fatigue resistance, and high hydrogen storage density per unit mass. Among them, efficient and precise molding of the plastic liner of the Type IV hydrogen storage bottle is very critical. Injection molding-welding molding is one of the important molding processes for plastic liner. The inefficiency and low yield of welding equipment and processes limit the efficient and high-quality development of the liner.

[0003] Plastic liner needs to work under high pressure, so the welding position (weld) is required to have sufficient welding strength. The key to obtaining good welding performance is to evenly distribute the temperature (heat) and pressure on the welding end face when welding heating and applying pressure. Infrared welding technology is a clean and efficient plastic welding technology, suitable for products with high requirements for welding performance and welding flash. During infrared welding, the infrared light source radiates heat to the ends to be welded on both sides and melts them. After removing the infrared light source, external force measures are used to promote the transition and fusion of the end face molecular chains, and the samples are connected by cooling and solidification.

[0004] However, when applied to the production of liner welding, the traditional infrared welding process has problems that are not conducive to the quality of the liner weld, welding uniformity, and welding efficiency. First, the infrared heater is usually in the form of a lamp tube, which has a fixed interface during processing and cannot be closed into a complete ring structure. When it is fixed in the middle of the two end faces to be welded, there is a heat radiation gap. When multiple coaxial annular lamp tubes with different diameters are used, the radial direction of the liner is prone to uneven temperature distribution. When multiple parallel fixed lamp tubes are used, the temperature distribution will be more uneven. In addition, after the lamp tube is heated, it takes a long time to move out of the working area (liner welding position), and the difficulty of temperature control increases with the increase of the liner diameter. Second, when an infrared lamp tube larger than the outer diameter of the liner is used, the temperature distribution of the welding end surface will decrease from the outer surface of the liner to the inner surface, which is not conducive to the quality control of the liner. Third, there are dimensional deviations in the liner components during the injection and extrusion process. Infrared lamp tubes with fixed diameters are prone to batch product quality differences and reduce the yield rate. Or the inner tank of a hydrogen storage bottle usually has multiple specifications, and replacing the heat source lamp increases the equipment cost and also affects production efficiency. Summary of the invention

[0005] In view of the above problems, the present invention provides an infrared welding forming equipment for the plastic liner of a hydrogen storage bottle, which provides uniform heat to the end face to be welded through dynamic rotational heating, and can be suitable for welding plastic liners with different diameters or size deviations by adjusting the radial heat source irradiation area. The rotating structure can enable the infrared heat source to quickly withdraw from the working area after heating the end face, thereby improving the heating efficiency and temperature controllability.

[0006] The purpose of the present invention can be achieved through the following technical solutions: an infrared welding forming equipment for the plastic liner of a hydrogen storage bottle, comprising a base, a first translation assembly, a second translation assembly, a first welding pressing cylinder, a second welding pressing cylinder, a first clamping assembly, a second clamping assembly, an infrared heating assembly, an upper panel and a support roller assembly. The support roller assembly is mounted on the base through a bearing seat, the first translation assembly and the second translation assembly are mounted on the base through a servo slide, the first clamping assembly is connected to the first translation assembly through a first welding pressing cylinder, the second clamping assembly is connected to the second translation assembly through a second welding pressing cylinder, the plastic liner is fixedly clamped on the first clamping assembly and the second clamping assembly, the infrared heating assembly is arranged between the first clamping assembly and the second clamping assembly, and is supported by the support roller assembly.

[0007] The first clamping assembly and the second clamping assembly are respectively translated left and right by the first translation assembly and the second translation assembly.

[0008] The first clamping assembly and the second clamping assembly are welded and pressed by means of a first welding and pressing cylinder and a second welding and pressing cylinder.

[0009] The infrared heating assembly includes a heating source rotation drive assembly, a rotating support ring, a lamp tube opening and closing control board, an opening and closing control cylinder, a lamp tube mounting fixture, an infrared lamp tube, a connecting rod, and an opening and closing connecting rod. The heating source rotation motor assembly is mounted on the upper side panel to provide power for dynamic rotation heating. The rotating support ring is supported by a supporting roller assembly. The connecting rod and the opening and closing connecting rod are connected to the rotating support ring in a circular array. The lamp tube mounting fixture is connected to the connecting rod and the opening and closing connecting rod in a circular array. The infrared lamp tube is mounted on the lamp tube mounting fixture in a circular array to ensure uniform heating of the end face. The lamp tube opening and closing control board is connected to the opening and closing connecting rod through a notch fit. The opening and closing control cylinder body is mounted on the rotating support ring. The opening and closing control cylinder push rod is connected to the lamp tube opening and closing control board.

[0010] The infrared heating assembly drives the lamp opening and closing control plate to rotate through the reciprocating operation of the opening and closing control cylinder, and the lamp opening and closing control plate drives the opening and closing connecting rod to rotate by cooperating with the notch of the opening and closing connecting rod, thereby driving the infrared lamp to rotate / twist, so as to realize the rapid positioning and withdrawal of the infrared lamp. At the same time, the diameter of the circle formed by the center line of the lamp can also be changed by controlling the reciprocating distance of the opening and closing control cylinder to control the movement angle of the lamp, so as to be used for welding inner tanks of different diameters.

[0011] That is, the infrared heating assembly is characterized in that the rotation angle of the lamp tube opening and closing control plate can be adjusted by adjusting the working stroke of the opening and closing control cylinder, thereby adjusting the radial heat source irradiation area of ​​the infrared lamp tube, which can adapt to the welding of inner tanks with different diameters or size deviations and reduce equipment costs.

[0012] The heating source rotating motor assembly in the infrared heating assembly is connected to the rotating support ring through gear matching. The heating source rotating motor assembly reciprocates to drive the infrared heating lamp tube to reciprocate, thereby providing uniform heat for the end face to be welded.

[0013] The first clamping assembly has the same structure as the second clamping assembly, including a clamp, a spring baffle, a clamp spring, a spring push cylinder, a spring, a spring end cover, a rubber ring and a spring rubber pad. The clamp is installed on the first welding press cylinder, the spring push cylinder is in clearance with the inner hole of the clamp, the spring baffle is fixed on the left end face of the spring push cylinder, the clamp spring is installed on the spring push cylinder and is limited by the spring baffle, the spring is installed on the countersunk hole at the right end of the clamp, the spring end cover is fixed on the right end face of the clamp to limit the spring, the rubber ring is installed between the spring end cover and the spring, and the spring rubber pad is fixed on the spring.

[0014] The first clamping assembly and the second clamping assembly achieve stable clamping of the plastic liner through the elasticity of the retaining spring, and evenly transfer the pressure provided by the first welding pressing cylinder and the second welding pressing cylinder to the welding surface. The retaining spring rubber pad can avoid direct contact between the sharp structure of the retaining spring and the plastic liner, eliminating possible scratches on the surface of the plastic liner caused by the retaining spring during clamping.

[0015] The first clamping assembly and the second clamping assembly press the spring baffle so that the inclined platform at the end of the retaining spring push cylinder squeezes the retaining spring, causing the retaining spring to undergo elastic deformation. At this time, the plastic liner loses its clamping force and the liner can be taken out. When the pressure on the spring baffle is released, the retaining spring push cylinder is reset under the action of the clamp spring. At this time, the inclined platform at the right end of the retaining spring push cylinder is out of contact with the retaining spring. The retaining spring is reset under the action of its own elasticity and the rubber ring, restoring the clamping force on the liner.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The equipment of the present invention can dynamically rotate when the circumferential array infrared lamp tubes are heated, and the required stroke for the lamp tubes to be placed in place and withdrawn is shortened, so that the uniformity of end surface heating during welding can be improved, the switching time between heating and pressing can be shortened, and the welding quality can be improved;

[0018] The equipment of the present invention can adjust the stroke of the opening and closing control cylinder to adjust the radial heat source irradiation area of ​​the infrared lamp tube, and can quickly adapt to the welding of inner tanks with different sizes or size deviations, thereby reducing equipment costs and improving production efficiency.

[0019] The equipment of the present invention can achieve stable clamping of the plastic liner due to the elasticity of the clamping spring in the clamping assembly so that the clamping spring rubber pad is in close contact with the plastic liner, and can evenly transmit the welding pressure to the welding end face, thereby improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of infrared welding forming equipment for a plastic liner of a hydrogen storage bottle according to the present invention;

[0021] Figure 2 It is a structural schematic diagram of an infrared heating component of infrared welding forming equipment for a plastic liner of a hydrogen storage bottle according to the present invention;

[0022] Figure 3 It is a structural schematic diagram of a clamping assembly of infrared welding forming equipment for a plastic liner of a hydrogen storage bottle according to the present invention;

[0023] Figure 4 It is a partial cross-sectional enlarged view of a clamping assembly of an infrared welding forming equipment for a plastic liner of a hydrogen storage bottle according to the present invention;

[0024] Figure 5 The present invention is a schematic diagram of the working stations of the infrared welding forming equipment for the plastic liner of a hydrogen storage bottle when the equipment is in operation, wherein (a) is the working station when the equipment of the present invention heats the welding end face, (b) is the working station when the infrared lamp tube of the infrared heating component is withdrawn, and (c) is the working station when the equipment of the present invention applies welding pressure.

[0025] In the figure: 1-base, 2-first translation assembly, 3-second translation assembly, 4-first welding pressing cylinder, 5-second welding pressing cylinder, 6-plastic liner, 7-first clamping assembly, 8-second clamping assembly, 9-infrared heating assembly, 10-upper side panel, 11-support roller assembly, 901-heating source rotation motor assembly, 902-rotating support ring, 903-lamp tube opening and closing control board, 904-opening and closing control cylinder, 905-lamp tube installation fixture, 906-infrared lamp, 907-connecting rod, 908-opening and closing connecting rod, 701-clamp, 702-spring baffle, 703-clamp spring, 704-circlip push cylinder, 705-circlip, 706-circlip end cover, 707-rubber ring, 708-circlip rubber pad. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution, action process and solution details of the present invention more clearly described, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention, but are not used to limit the present invention. Based on the embodiments of the present invention, all other examples obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0027] The terms "front" and "rear" in this article are relative to the actual operator. "Front" refers to the part relatively far from the operator, while "rear" refers to the part relatively close to the operator. The terms "up", "down", "left", and "right" are relative to the actual operator. Figure 1 The positions shown are for reference only, and "left" also refers to "front" and "right" also refers to "back". It should be noted that the above mentioned directional words are defined for the convenience of describing the present invention, but the application positions and directions of the present invention are diverse, so the above directional words are not absolute.

[0028] In the present invention, the terms "connected", "connected", "matched", "installed" and the like should be understood in a broad sense, and may refer to direct connection or indirect connection through an intermediate medium, and may refer to the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. It should be noted that when there are qualifiers before "connected" or "connected", they have the meanings defined by the corresponding qualifiers, and only exclude situations that obviously need to be excluded, and do not exclude other possible situations. For example, "detachably connected" refers to a detachable connection, and does not include fixed connection and integration, but movable connection, direct connection, and indirect connection through an intermediate medium are not excluded.

[0029] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0030] Please refer to Figure 1 The present invention discloses an infrared welding forming equipment for a plastic liner of a hydrogen storage bottle, comprising a base 1, a first translation assembly 2 and a second translation assembly 3 installed on the base 1 through a servo slide, a support roller assembly 11 installed on the base 1 through a bearing seat, a first welding pressing cylinder 4 and a second welding pressing cylinder 5 installed on the first translation assembly 2 and the second translation assembly 3 respectively, a first clamping assembly 7 and a second clamping assembly 8 installed on the first welding pressing cylinder 4 and the second welding pressing cylinder 5 respectively, an infrared heating assembly 9 arranged between the first clamping assembly 7 and the second clamping assembly 8 and supported by the support roller assembly 11, and an upper side panel 10.

[0031] Furthermore, the first clamping assembly 7 and the second clamping assembly 8 are translated left and right through the first translation assembly 2 and the second translation assembly 3, and the left and right positions are adjustable. The first clamping assembly 7 and the second clamping assembly 8 are welded and pressed through the first welding and pressing cylinder 4 and the second welding and pressing cylinder 5, and the welding pressure is adjustable.

[0032] Please refer to Figure 2 The infrared heating component 9 as a whole includes a heating source rotating motor component 901 installed on the upper panel 10, a rotating support ring 902 supported by a supporting roller component 11, connecting rods 907 and opening and closing connecting rods 908 connected to the rotating support ring 902 in a circular array, a lamp tube mounting fixture 905 connected to the connecting rods 907 and the opening and closing connecting rods 908 in a circular array, a lamp tube opening and closing control board 903 connected to the opening and closing connecting rods 908 through a slot, an opening and closing control cylinder 904 installed on the rotating support ring 902, a push rod of the opening and closing control cylinder 904 connected to the lamp tube opening and closing control board 903, and infrared lamps 906 installed on the lamp tube mounting fixture 905 in a circular array.

[0033] Furthermore, the overall opening and closing movement process of the infrared heating component 9 is: the lamp tube opening and closing control plate 903 is driven to rotate through the operation of the opening and closing control cylinder 904, and the lamp tube opening and closing control plate 903 drives the opening and closing connecting rod 908 to rotate through the groove cooperation, thereby driving the infrared lamp tube 906 to move, and realizing the rapid positioning and withdrawal of the infrared lamp tube 906. At the same time, the radial heat source irradiation area is adjusted according to the different moving strokes of the opening and closing control cylinder, which can adapt to the welding of inner tanks with different diameters or size deviations.

[0034] Furthermore, the overall rotation process of the infrared heating component 9 is as follows: the heating source rotating motor component 901 is connected to the rotating support ring 902 through gear cooperation, and the heating source rotating motor component 901 reciprocates to drive the rotating support ring 902 to move, thereby realizing the reciprocating rotation of the infrared lamp tube 906. The rotation angle of the rotating support ring needs to be greater than 360° / the number of infrared lamp tubes in the array to ensure that the end face to be welded can receive uniform radiation and heat.

[0035] Please refer to Figure 3 , Figure 4The first clamping assembly 7 as a whole includes a clamp 701 installed on the first welding pressing cylinder 4, a retaining spring push cylinder 704 installed in cooperation with the inner hole clearance of the clamp 701, a spring baffle 702 fixed to the left end surface of the retaining spring push cylinder 704, a clamp spring 703 installed on the retaining spring push cylinder 704 and limited by the spring baffle 702, a retaining spring 705 installed in the countersunk hole at the right end of the clamp, a retaining spring end cover 706 fixed to the right end surface of the clamp to limit the retaining spring 705, a rubber ring 707 installed between the retaining spring end cover 706 and the retaining spring 705, and a retaining spring rubber pad 708 fixed on the retaining spring 705.

[0036] Furthermore, the principle of clamping by the first clamping assembly 7 is that in the initial state without clamping the plastic liner 6, the spring push cylinder 704 moves to the left under the elastic action of the clamp spring 703 until the vertical surface of the inclined platform of the spring push cylinder 704 contacts the countersunk hole of the clamp 701, at which time the inclined surface of the inclined platform of the spring push cylinder 704 does not contact the spring 705, and the spring 705 is in a relaxed state. When the spring baffle 702 is pressed, the clamp spring 703 is compressed, the spring push cylinder 704 moves to the right, the inclined surface of the inclined platform of the spring push cylinder 704 contacts the spring 705 and causes the spring 705 to undergo elastic deformation, until the diameter of the hole formed by the spring 705 is larger than the diameter of the plastic liner 6, and then the plastic liner can be installed on the first clamping assembly 7. When the pressure on the spring baffle 702 is canceled, the elastic potential energy of the clamp spring 703 is released, and the spring push cylinder 704 is reset under the action of the clamp spring 703. At this time, the inclined surface of the right end ramp of the spring push cylinder 704 is out of contact with the spring 705, and the spring 705 rebounds under its own elasticity and the action of the rubber ring 707 until the spring rubber pad 708 contacts the surface of the plastic liner 6. Because the diameter of the hole formed by the spring 705 in the initial state is smaller than the outer diameter of the plastic liner 6, the spring 705 still has a certain elastic deformation, thereby achieving the clamping of the plastic liner 6. After welding is completed, by pressing the spring baffle 702, the right end ramp of the spring push cylinder 704 squeezes the spring 705, causing the spring 705 to undergo elastic deformation. At this time, the plastic liner 6 loses its clamping force, and the plastic liner 6 can be taken out.

[0037] Furthermore, the plastic liner 6 is stably clamped by the elastic deformation of the retaining spring 705, and the pressure provided by the first welding pressing cylinder 4 is evenly transferred to the welding surface. The retaining spring rubber pad 708 can eliminate the scratches that the retaining spring 705 may cause to the surface of the plastic liner 6 during clamping.

[0038] The second clamping assembly 8 has the same structure and working principle as the first clamping assembly 7 .

[0039] Reference Figure 1 , Figure 5 The specific implementation process is as follows:

[0040] The first clamping assembly 7 and the second clamping assembly 8 are moved to the first translation assembly 2 and the second translation assembly 3 Figure 1 The plastic liner 6 to be welded is respectively mounted and fixed on the first clamping assembly 7 and the second clamping assembly 8, and the infrared heating assembly 9 is driven by the opening and closing control cylinder to enter the heating position.

[0041] The first clamping assembly 7 and the second clamping assembly 8 are moved to the first translation assembly 2 and the second translation assembly 3 Figure 5 (a) shows the position, at this time, the distance between the end surface of the plastic liner 6 and the infrared lamp 906 is the set heating distance. After all components are in place, the infrared lamp 906 starts to heat the end surface of the plastic liner 6 until the temperature reaches the set value.

[0042] After the end surface of the plastic liner 6 is heated, the array of infrared lamps 906 are quickly withdrawn under the drive of the opening and closing control cylinder 904. Figure 5 At this time, under the action of the first welding and pressing cylinder 4 and the second welding and pressing cylinder 5, the end faces of the plastic liner 6 to be welded are pressed together and cooled at the same time to form a weld, as shown in FIG. Figure 5 (c) as shown.

[0043] After sufficient cooling to form the weld, the plastic liner 6 can be removed, and then the components are pressed Figure 1 The plastic liner 6 is reset as shown, and the above process is repeated to realize continuous automatic welding and forming.

Claims

1. An infrared welding forming equipment for the plastic liner of a hydrogen storage bottle, characterized in that: It includes a base, a first translation component, a second translation component, a first welding pressing cylinder, a second welding pressing cylinder, a first clamping component, a second clamping component, an infrared heating component, an upper side panel and a supporting roller component, wherein the supporting roller component is installed on the base through a bearing seat, and the first translation component and the second translation component are installed on the base through a servo slide, the first clamping component is connected to the first translation component through a first welding pressing cylinder, and the second clamping component is connected to the second translation component through a second welding pressing cylinder, the plastic liner is fixedly clamped on the first clamping component and the second clamping component, and the infrared heating component is arranged between the first clamping component and the second clamping component and supported by the supporting roller component; the first clamping component and the second clamping component are respectively translated left and right through the first translation component and the second translation component; the first clamping component and the second clamping component The holding assembly realizes welding and pressing through the first welding and pressing cylinder and the second welding and pressing cylinder; the infrared heating assembly includes a heating source rotation drive assembly, a rotating support ring, a lamp tube opening and closing control panel, an opening and closing control cylinder, a lamp tube mounting fixture, an infrared lamp tube, a connecting rod and an opening and closing connecting rod; the heating source rotation motor assembly is installed on the upper side panel to provide power for dynamic rotation heating, the rotating support ring is supported by a supporting roller assembly, the connecting rod and the opening and closing connecting rod are arranged in a circular array and connected to the rotating support ring, the lamp tube mounting fixture is connected to the connecting rod and the opening and closing connecting rod in a circular array, the infrared lamp tube is installed on the lamp tube mounting fixture in a circular array to ensure uniform heating of the end face, the lamp tube opening and closing control panel is connected to the opening and closing connecting rod through a slot fit, the opening and closing control cylinder body is installed on the rotating support ring, and the opening and closing control cylinder push rod is connected to the lamp tube opening and closing control panel.

2. The infrared welding forming equipment for the plastic liner of a hydrogen storage bottle according to claim 1 is characterized in that: The infrared heating component drives the lamp tube opening and closing control plate to rotate through the reciprocating operation of the opening and closing control cylinder. The lamp tube opening and closing control plate drives the opening and closing connecting rod to rotate by cooperating with the notch of the opening and closing connecting rod, thereby driving the infrared lamp tube to rotate / twist, thereby realizing the rapid positioning and withdrawal of the infrared lamp tube; or by controlling the reciprocating motion distance of the opening and closing control cylinder, the movement angle of the lamp tube is controlled to realize the change of the diameter of the circle formed by the center line of the lamp tube, which is used for welding inner tanks of different diameters.

3. The infrared welding forming equipment for the plastic liner of a hydrogen storage bottle according to claim 1 is characterized in that: The heating source rotating motor assembly in the infrared heating assembly is connected to the rotating support ring through gear matching. The heating source rotating motor assembly reciprocates to drive the infrared heating lamp tube to reciprocate, thereby providing uniform heat for the end face to be welded.

4. The infrared welding forming equipment for the plastic liner of a hydrogen storage bottle according to claim 1, characterized in that: The first clamping assembly has the same structure as the second clamping assembly, including a clamp, a spring baffle, a clamp spring, a retaining spring push cylinder, a retaining spring, a retaining spring end cover, a rubber ring and a retaining spring rubber pad. The clamp is installed on the first welding pressing cylinder, the retaining spring push cylinder is clearance-matched with the inner hole of the clamp, the spring baffle is fixed to the left end face of the retaining spring push cylinder, the clamp spring is installed on the retaining spring push cylinder and is limited by the spring baffle, the retaining spring is installed in the countersunk hole at the right end of the clamp, the retaining spring end cover is fixed to the right end face of the clamp to limit the retaining spring, the rubber ring is installed between the retaining spring end cover and the retaining spring, and the retaining spring rubber pad is fixed on the retaining spring.

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