Aging device for aluminum profile

Abstract

The utility model discloses an aluminum profile aging device which comprises a conveying assembly, a heat treatment assembly and a cold treatment assembly, the conveying assembly comprises a conveying belt and a material carrying disc, two limiting plates are arranged on the conveying belt, a heat treatment station and a cold treatment station are arranged between the two limiting plates, and a bearing positioning groove is formed in the bottom of the material carrying disc; the heat treatment assembly comprises a heating furnace, a heating module, a lifting driving module and a bearing support arm, the heating furnace is located above the heat treatment station, a furnace opening is formed in the bottom of the heating furnace, the bearing support arm is connected to the lifting driving module, and the lifting driving module is used for driving the bearing support arm to move back and forth between the heating furnace and the heat treatment station; and the cold treatment assembly comprises a cooling cabin and a cooling fan, and the cooling cabin is arranged on the cold treatment station. The aluminum profile aging treatment device can effectively improve the consistency and stability of aging treatment on aluminum profile products, and is high in energy utilization rate, high in aging treatment efficiency and low in aging treatment cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aging treatment, particularly to an aging device for aluminum profile. BACKGROUND

[0002] In the aluminum profile processing industry, aging treatment is one of the key steps to improve the mechanical properties and corrosion resistance of aluminum profiles. Aging treatment is a process in which metal or alloy workpieces are subjected to solid solution treatment, cold plastic deformation or casting forging, and then are placed in a specified environment to eliminate internal stress and improve mechanical properties.

[0003] Aging treatment usually includes two stages of heating treatment and cooling treatment, aiming to change the precipitated phase inside the aluminum profile by precisely controlling temperature and time, so as to optimize the material properties. The traditional aging treatment method adopts a static furnace for heating and holding, and then realizes natural cooling. This method needs to repeatedly raise and lower the temperature in the same space, has low energy utilization rate, takes a long time, and has low aging treatment efficiency. SUMMARY

[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides an aging device for aluminum profile, which has high energy utilization rate, high aging treatment efficiency, and can effectively save aging cost.

[0005] According to the aging device for aluminum profile provided in the embodiment of the utility model, the aging device comprises:

[0006] The conveying assembly comprises a conveying belt and a loading tray, two limiting plates are arranged on the conveying belt, the two limiting plates are parallel to the conveying direction of the conveying belt, a heat treatment station and a cold treatment station are arranged between the two limiting plates, the conveying belt is used to drive the loading tray to move, and a supporting positioning groove is arranged at the bottom of the loading tray;

[0007] The heat treatment assembly comprises a heating furnace, a heating module, a lifting driving module and a supporting arm, the heating furnace is located above the heat treatment station, the heating module is arranged in the heating furnace, the bottom of the heating furnace is provided with a furnace opening, the supporting arm is connected to the lifting driving module, the lifting driving module is used to drive the supporting arm to reciprocate between the heating furnace and the heat treatment station, and the supporting arm is used to be plugged into the supporting positioning groove;

[0008] The cold treatment assembly comprises a cooling cabin and a cooling fan, the cooling cabin is arranged on the cold treatment station, and the cooling fan is arranged in the cooling cabin.

[0009] In the embodiment, the cold treatment assembly further comprises a cooling member arranged in the cooling cabin, and the cooling member is located at the air outlet of the cooling fan.

[0010] In the embodiment, the cooling member is a circulating cold water pipe.

[0011] In the embodiment, one side of the heating furnace is provided with an opening and closing motor, the output end of the opening and closing motor is connected with a gear, the opposite two inner walls of the heating furnace are provided with guide grooves, the furnace mouth is provided with a furnace cover, the furnace cover is slidingly connected between the two guide grooves, the top of the furnace cover is provided with a rack, and the rack is in meshing connection with the gear.

[0012] In the embodiment, the inner wall of the heating furnace is provided with a heat insulation layer.

[0013] In the embodiment, the heating module comprises a heater and a heating fan, and the heater is located at the air outlet of the heating fan.

[0014] In the embodiment, the side surface of the material loading plate is provided with a plurality of air holes.

[0015] In the embodiment, the lifting driving module comprises an oil cylinder and a lifting support, the lifting support is connected to the oil cylinder, the supporting arm is provided with two and is connected to the bottom of the lifting support, and the supporting positioning groove is provided with two.

[0016] The embodiment of the utility model has at least the following beneficial effects:

[0017] The two spaces are separated to heat treat and cold treat the aluminum profile products respectively, the temperature in the heating furnace and the cooling cabin can be effectively maintained, the temperature fluctuation of the two spaces is small, the uniformity of heating and cooling can be effectively improved, the consistency and stability of aging treatment of the aluminum profile products can be effectively improved, the energy loss and waste can be significantly reduced, the energy utilization rate is high, the cost of aging treatment is low, the temperature changing time required for adjusting the space temperature can be effectively saved, the efficiency of heat treatment and cold treatment can be effectively improved, and the overall aging treatment efficiency is high; in addition, the aluminum profile products are conveyed to the heat treatment station and the cold treatment station through the conveying assembly, the conveying efficiency of the aluminum profile products can be effectively improved, the production efficiency is effectively improved, manual intervention can be reduced, the labor intensity is reduced, the safety of production is improved, the heat treatment assembly and the cold treatment assembly can simultaneously heat treat and cold treat the aluminum profile products in different material loading plates, and the aging treatment efficiency of the overall device can be effectively improved; the heating furnace is arranged above the heat treatment station, and the furnace mouth of the heating furnace faces downward, the loss of the upward high-temperature airflow can be effectively reduced, the energy utilization rate can be further improved, and the aging treatment cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0019] Figure 1 It is a three-dimensional structure schematic view of the aging device for the aluminum profile of the utility model embodiment;

[0020] Figure 2The utility model discloses an aging device for aluminum profile under another perspective three -dimensional structure schematic diagram of embodiment of the utility model;

[0021] Figure 3 The utility model discloses an aging device for aluminum profile under another working condition three -dimensional structure schematic diagram of embodiment of the utility model;

[0022] Figure 4 The utility model discloses an aging device for aluminum profile in heat treatment subassembly's structure schematic diagram of embodiment of the utility model.

[0023] Reference signs:

[0024] Conveying assembly 100, conveying belt 110, limiting plate 111, material loading disc 120, supporting positioning groove 121, air hole 122, heat treatment station 130, cold treatment station 140;

[0025] Heat treatment assembly 200, heating furnace 210, furnace mouth 211, guide groove 212, heat insulation layer 213, heating module 220, heater 221, heating fan 222, lifting drive module 230, oil cylinder 231, lifting support 232, supporting arm 240, opening and closing motor 250, gear 251, furnace cover 260, rack 261;

[0026] Cold treatment assembly 300, cooling cabin 310, cooling fan 320, cold supply part 330. DETAILED DESCRIPTION

[0027] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0028] In the description of the utility model, it is understood that the orientation description, such as up, down, left, right, front, back and the like, is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0029] In the description of the utility model, if the line cover, support is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Aging treatment is a process in which internal stresses are eliminated and mechanical properties are improved in a specified environment after metal or alloy workpieces have undergone solution treatment, cold plastic deformation, or casting and forging. Aging treatment typically includes two stages: heating and cooling. Its aim is to optimize material properties by precisely controlling temperature and time to induce changes in the precipitated phases within the aluminum profile. Traditional aging treatment methods often use static furnaces for heating and holding followed by natural cooling. This method requires repeated heating and cooling of the same space, resulting in low energy efficiency, long processing time, low aging treatment efficiency, difficulty in temperature control, uneven cooling effects, and insufficient consistency in aluminum profile products.

[0032] Especially during the heat treatment stage, uneven heating can lead to differences in the internal structure of the aluminum profile, affecting the consistency of the final product's performance. Similarly, insufficient cooling rate or uniformity during the cooling stage can also affect the aging effect and may even cause material deformation or cracking. Furthermore, traditional aging devices mostly rely on manual handling of aluminum profiles in and out of heating and cooling equipment, which is not only labor-intensive but also difficult to automate, limiting the expansion of production scale and the improvement of production efficiency.

[0033] The following is for reference only. Figure 1 To be continued Figure 4 This invention describes an aging device for aluminum profiles, which has high energy utilization, high aging efficiency, and can effectively save aging costs.

[0034] Reference Figures 1 to 4 An aging device for aluminum profiles according to an embodiment of the present invention includes:

[0035] The conveying assembly 100 includes a conveyor belt 110 and a loading tray 120. The loading tray 120 is used to load aluminum profile products. The conveyor belt 110 is provided with two limiting plates 111, both of which are parallel to the conveying direction of the conveyor belt 110, that is, each limiting plate 111 extends along the conveying direction of the conveyor belt 110. A heat treatment station 130 and a cold treatment station 140 are provided between the two limiting plates 111. The heat treatment station 130 and the cold treatment station 140 are arranged adjacent to each other on the horizontal plane. The conveyor belt 110 is used to drive the loading tray 120 to move so that the loading tray 120 passes through and reaches the heat treatment station 130 or the cold treatment station 140. The two limiting plates 111 are used to limit the position of the loading tray 120. The bottom of the loading tray 120 is provided with a support positioning groove 121, which extends along the conveying direction of the conveyor belt 110.

[0036] The heat treatment assembly 200 comprises a heating furnace 210, a heating module 220, a lifting driving module 230 and a supporting arm 240. The heating furnace 210 is located above the heat treatment station 130. The heating module 220 is arranged in the heating furnace 210 and is used for heating the internal environment of the heating furnace 210. The heating furnace 210 is connected to the rack and is supported above the conveying belt 110 by the rack. The lifting driving module 230 is connected to the heating furnace 210. The bottom of the heating furnace 210 is provided with a furnace opening 211 which faces downward and is opposite to the heat treatment station 130. Compared with normal temperature air, high temperature air rises upward. The top and the periphery of the heating furnace 210 are closed structures, which can effectively limit the position of the high temperature air and effectively reduce the energy loss. The supporting arm 240 is connected to the lifting driving module 230. The lifting driving module 230 is used for driving the supporting arm 240 to reciprocate between the internal environment of the heating furnace 210 and the heat treatment station 130, i.e. the heating furnace 210 and the heat treatment station 130 are respectively located at opposite ends of the lifting path of the supporting arm 240. The supporting arm 240 is parallel to the conveying direction of the conveying belt 110. The supporting arm 240 is used for being plugged into the supporting positioning groove 121 so that the supporting arm 240 can be inserted into the supporting positioning groove 121 and is lifted to hold the carrier disc 120 under the driving of the lifting driving module 230.

[0037] The cold treatment assembly 300 comprises a cooling cabin 310 and a cooling fan 320. The cooling cabin 310 is arranged on the cold treatment station 140 and is along the conveying direction of the conveying belt 110. Opposite sides of the cooling cabin 310 are respectively provided with a cooling inlet and a cooling outlet. The conveying belt 110 is arranged in the cooling outlet and the cooling inlet. The cooling outlet and the cooling inlet are used for providing space for the carrier disc 120 which is advancing on the conveying belt 110. The cooling fan 320 is arranged in the cooling cabin 310. Preferably, the side wall of the cooling cabin 310 is provided with a through hole which is connected to the air inlet of the cooling fan 320. The air outlet of the cooling fan 320 faces the internal environment of the cooling cabin 310.

[0038] It should be noted that the two limiting plates 111 are further provided with a feeding station which is located on the side of the heat treatment station 130 away from the cold treatment station 140.

[0039] In operation, the aluminum profile products are placed into the carrier tray 120 by manual or mechanical means, and the carrier tray 120 is placed into the feeding station on the conveying belt 110. The lifting drive module 230 drives the supporting arm 240 to descend onto the surface of the conveying belt 110, and the conveying belt 110 drives the carrier tray 120 to advance so that the carrier tray 120 reaches the heat treatment station 130, and the supporting arm 240 is inserted into the supporting positioning groove 121. The lifting drive module 230 drives the supporting arm 240 to ascend to lift the carrier tray 120 into the heating furnace 210, and the heating module 220 heats the internal space of the heating furnace 210 to heat treat the aluminum profile products in the carrier tray 120. After a preset heat treatment time, the lifting drive module 230 drives the supporting arm 240 to descend to lower the carrier tray 120 to the conveying surface of the conveying belt 110, and the aluminum profile products are placed into another carrier tray 120 by manual or mechanical means and placed into the feeding station. The conveying belt 110 drives the two carrier trays 120 to retreat so that the supporting arm 240 is separated from the supporting positioning groove 121, and the lifting drive module 230 drives the supporting arm 240 to ascend to make room for the carrier tray 120. The conveying belt 110 drives the two carrier trays 120 to advance so that the carrier tray 120 that has completed the heat treatment leaves the heat treatment station 130, and the carrier tray 120 that needs to be treated leaves the feeding station. The lifting drive module 230 drives the supporting arm 240 to descend onto the surface of the conveying belt 110. The conveying belt 110 drives the two carrier trays 120 to further advance so that the carrier tray 120 that has completed the heat treatment advances to the cold treatment station 140, and the carrier tray 120 that needs to be treated reaches the heat treatment station 130. The cooling fan 320 operates to accelerate the heat exchange between the aluminum profile products in the cooling cabin 310 and the air, thereby cooling the aluminum profile products. The lifting drive module 230 drives the carrier tray 120 that needs to be treated into the heating furnace 210 by the supporting arm 240 to heat treat. The heat treatment and cold treatment of different batches of aluminum profile products can be performed simultaneously, which can effectively improve the efficiency of the aging treatment.

[0040] By separating two spaces for heat treatment and cold treatment of aluminum profile products respectively, the temperature in the heating furnace 210 and the cooling cabin 310 can be effectively maintained, the temperature fluctuation of the two independent spaces is small, the uniformity of heating and cooling can be effectively improved, the consistency and stability of aging treatment of aluminum profile products can be effectively improved, the mechanical properties and corrosion resistance of aluminum profile products obtained by aging treatment can be effectively improved, compared with the traditional technology of placing aluminum profile products in the same space for heating treatment and cooling treatment, the aging device can not only significantly reduce the energy loss and waste, has high energy utilization rate, low aging treatment cost, but also can effectively save the temperature changing time required for adjusting the space temperature, can effectively improve the efficiency of heat treatment and cold treatment, and has high overall aging treatment efficiency; in addition, the aluminum profile products are conveyed to the heat treatment station 130 and the cold treatment station 140 by the conveying assembly 100, the conveying efficiency of the aluminum profile products can be effectively improved, thereby the production efficiency can be effectively improved, the manual intervention can be reduced, the labor intensity is reduced, the production safety is improved, and the heat treatment assembly 200 and the cold treatment assembly 300 can simultaneously heat treat and cold treat the aluminum profile products in different loading trays 120, so that the aging treatment efficiency of the overall device can be effectively improved; the heating furnace 210 is arranged above the heat treatment station 130, and the furnace opening 211 of the heating furnace 210 faces downward, so that the loss of the rising high-temperature airflow can be effectively reduced, the energy utilization rate can be further improved, the aging treatment cost is low, and in particular, for the device which separates two spaces for heat treatment and cold treatment of aluminum profile products, the loading tray 120 loaded with aluminum profile products needs to be continuously input or output, and the downward setting of the furnace opening 211 of the heating furnace 210 can further reduce the energy loss.

[0041] It can be understood that the cold treatment assembly 300 further comprises a cooling member 330 arranged in the cooling cabin 310, the cooling member 330 is located at the air outlet of the cooling fan 320, the cooling member 330 is used for providing a cooling source for cooling and temperature reduction of the inside of the cooling cabin 310, and the cooling fan 320 is used for accelerating heat exchange between the cooling member 330 and the aluminum profile products, so that the cooling efficiency of the cooling cabin 310 can be effectively improved, and the uniformity of temperature drop in each region inside the cooling cabin 310 can be effectively improved, thereby the efficiency of aging treatment of the aluminum profile products can be effectively improved.

[0042] It can be understood that the cooling member 330 is a circulating cold water pipe, the outlet and the inlet of the circulating cold water pipe are both located outside the cooling cabin 310, and the outlet and the inlet of the circulating cold water pipe are respectively connected to a recovery device and a cold water supply device. According to the aging requirements of the produced aluminum profile products, the temperature of the cold water in the cold water supply device is adjusted to adjust the cooling rate of the inside of the cooling cabin 310, so that the production requirements of different aluminum profile products can be effectively met.

[0043] It can be understood that one side of the heating furnace 210 is provided with an opening and closing motor 250, which can be connected to the heating furnace 210 or the rack. The output end of the opening and closing motor 250 is connected with a gear 251. The opposite two inner walls of the heating furnace 210 are provided with guide grooves 212 parallel to the horizontal plane. The furnace opening 211 is provided with a furnace cover 260 which is slidingly connected between the two guide grooves 212, which can effectively limit the horizontal position of the furnace cover 260. The top of the furnace cover 260 is provided with a rack 261 which is engagedly connected with the gear 251. The opening and closing motor 250 is used to drive the furnace cover 260 to open and close the furnace opening 211 through the gear 251 and the rack 261.

[0044] Referring to Figure 1 and Figure 2 When heat treatment is performed, the opening and closing motor 250 drives the furnace cover 260 to close the furnace opening 211 through the gear 251 and the rack 261, so that the inside of the heating furnace 210 forms a closed space, which can effectively improve the heat treatment efficiency and further reduce the energy loss. Figure 3 and Figure 4 When it is necessary to output or input the carrier tray 120 to the heating furnace 210, the opening and closing motor 250 drives the furnace cover 260 to move away from the furnace opening 211 through the gear 251 and the rack 261, so as to open the furnace opening 211, and the lifting driving module 230 drives the carrier tray 120 to ascend and descend through the supporting arm 240 to realize the accommodation.

[0045] Specifically, the side of the heating furnace 210 close to the opening and closing motor 250 is provided with an accommodation groove, and the furnace cover 260 and the rack 261 are arranged in the accommodation groove, so as to ensure that the furnace cover 260 can smoothly move to the outside of the furnace opening 211.

[0046] It can be understood that the inner wall of the heating furnace 210 is covered with a heat insulation layer 213, which can effectively reduce the heat exchange between the heating furnace 210 and the external environment, thereby further improving the energy utilization rate. Preferably, the heat insulation layer 213 can be an aluminum silicate cotton layer.

[0047] The heat insulation layer 213 can be arranged on the inner wall of the heating furnace 210, and can also be arranged on the outer wall of the heating furnace 210.

[0048] It can be understood that the heating module 220 comprises a heater 221 and a heating fan 222, the heater 221 is located at the air outlet of the heating fan 222, the heater 221 is used for heating the internal space of the heating furnace 210, and the heating fan 222 is used for accelerating heat exchange between the heater 221 and the internal environment of the heating furnace 210, which can effectively improve the heating efficiency in the heating furnace 210, effectively improve the uniformity of temperature rise in each region inside the heating furnace 210, effectively improve the efficiency of realizing treatment on the aluminum profile, effectively improve the effect of aging treatment, and effectively improve the consistency and stability of the aluminum profile product obtained by aging treatment. The heater 221 can be an electric heater, an infrared heater or a high-temperature airflow pipe.

[0049] Specifically, the side of the loading tray 120 is provided with a plurality of evenly distributed air holes 122, and the air holes 122 can improve the contact effect between the hot air in the heating furnace 210 and the aluminum profile product, thereby effectively improving the heat exchange efficiency and the efficiency of heat treatment. The air outlet of the heating fan 222 faces the air holes 122.

[0050] It can be understood that the lifting driving module 230 comprises a cylinder 231 and a lifting support 232, the lifting support 232 is connected to the cylinder 231, the cylinder body of the cylinder 231 can be connected to the heating furnace 210 or the rack, the supporting arm 240 is provided with two, and the two supporting arms 240 are connected to the bottom of the lifting support 232, the supporting positioning groove 121 at the bottom of the loading tray 120 is provided with two, and the two supporting positioning grooves 121 are matched with the two supporting arms 240 respectively, the supporting arm 240 is connected to the bottom of the lifting support 232, which can effectively control the position of the cylinder 231 and avoid the cylinder 231 hindering the conveying of the loading tray 120 on the conveying belt 110.

[0051] Specifically, the lifting driving module 230 further comprises a guide rail mechanism, which is connected to the heating furnace 210 and the lifting support 232 respectively, so as to limit the position of the lifting support 232 relative to the heating furnace 210, and effectively improve the stability of the action of lifting or lowering the loading tray 120 by the supporting arm 240.

[0052] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An aging device for an aluminum material, characterized by comprising: The utility model relates to a heat treatment device and cold treatment device, and belongs to the field of heat treatment and cold treatment. The heat treatment device comprises a conveying assembly (100), a heat treatment assembly (200) and a cold treatment assembly (300). The conveying assembly (100) comprises a conveying belt (110) and a carrier disc (120), two limiting plates (111) are arranged on the conveying belt (110), the two limiting plates (111) are parallel to the conveying direction of the conveying belt (110), a heat treatment station (130) and a cold treatment station (140) are arranged between the two limiting plates (111), the conveying belt (110) is used for driving the carrier disc (120) to move, and a supporting positioning groove (121) is arranged at the bottom of the carrier disc (120). The heat treatment assembly (200) comprises a heating furnace (210), a heating module (220), a lifting driving module (230) and a supporting arm (240), the heating furnace (210) is located above the heat treatment station (130), the heating module (220) is arranged in the heating furnace (210), a furnace opening (211) is arranged at the bottom of the heating furnace (210), the supporting arm (240) is connected to the lifting driving module (230), the lifting driving module (230) is used for driving the supporting arm (240) to reciprocate between the heating furnace (210) and the heat treatment station (130), and the supporting arm (240) is used for being plugged into the supporting positioning groove (121).

2. The device for aging aluminum material according to claim 1, wherein The cold treatment assembly (300) comprises a cooling cabin (310) and a cooling fan (320), the cooling cabin (310) is arranged on the cold treatment station (140), and the cooling fan (320) is arranged in the cooling cabin (310).

3. The device for aging aluminum material according to claim 2, wherein The cold treatment assembly (300) further comprises a cooling component (330) arranged in the cooling cabin (310), and the cooling component (330) is located at the air outlet of the cooling fan (320).

4. The device for aging aluminum material according to claim 1, wherein The cooling component (330) is a circulating cold water pipe.

5. The device for aging aluminum material according to claim 1, wherein One side of the heating furnace (210) is provided with an opening and closing motor (250), an output end of the opening and closing motor (250) is connected with a gear (251), opposite two inner walls of the heating furnace (210) are provided with guide grooves (212), a furnace cover (260) is arranged at the furnace opening (211), the furnace cover (260) is slidably connected between the two guide grooves (212), a rack (261) is arranged at the top of the furnace cover (260), and the rack (261) is in meshing connection with the gear (251).

6. The device for aging aluminum material according to claim 1, wherein An inner wall of the heating furnace (210) is provided with a heat insulation layer (213).

7. The device for aging aluminum material according to claim 6, wherein The heating module (220) comprises a heater (221) and a heating fan (222), and the heater (221) is located at the air outlet of the heating fan (222).

8. The device for aging aluminum material according to claim 1, wherein A side of the carrier disc (120) is provided with a plurality of air holes (122). The lifting driving module (230) comprises an oil cylinder (231) and a lifting support (232), the lifting support (232) is connected to the oil cylinder (231), the supporting arm (240) is provided with two supporting arms and is connected to the bottom of the lifting support (232), and the supporting positioning groove (121) is provided with two supporting positioning grooves.

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