Lifting heating rail door of false twist texturing machine and energy-saving hot box

Abstract

The utility model discloses a lifting heating track door and energy -conserving heat box of false twist texturing machine, in the light of traditional heat box energy consumption is high, the problem of big heat loss, lifting heating track door adopts arc heat preservation covering structure, curvature radius R20010 1mm, and the clearance control is at 5 15mm between hot rail, cooperates " connecting rod + elastic piece + double fulcrum " structure, ensures that the micro -gap is under the stable opening and closing, and the door body is equipped with multilayer composite heat preservation structure and mirror surface reflection film, and the heat preservation and heat radiation utilization are strengthened. Energy -conserving heat box adopts the modular vertical design, utilizes the heat medium natural convection, and is equipped with the asbestos heat preservation layer between the box and the shell. The experiment shows that the energy consumption is reduced by 69% than the traditional heat box when the clearance is 5mm, and the operation is convenient, the temperature uniformity is promoted, is applicable to the chemical fiber false twist texturing process, and the energy consumption and production cost are reduced significantly.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment technology, and in particular to a lifting heating rail door and energy-saving heating box for a false twist texturing machine. Background Technology

[0002] In the chemical fiber processing sector of the textile industry, false twist texturing technology is one of the core processes for producing elastic yarn. It involves a plastic deformation treatment of chemical fiber filaments through "heating and twisting followed by cooling and untwisting," giving the filaments a spiral crimped structure, thus endowing the finished yarn with excellent elastic recovery properties and a fluffy feel. This technology is widely used in clothing fabrics, home textiles, and industrial textiles, and is a key technological link in enhancing the added value of chemical fiber products. The false twist texturing machine, as the core equipment for realizing this process, directly affects the quality and production cost of the elastic yarn, while the texturing heat box, as a key functional component of the equipment, plays a crucial role in contact heating and plasticizing the filaments.

[0003] Existing false-twist texturing machines generally employ a contact-type temperature control mode using radiant heating with electric heating wires or circulating heating with a heat transfer medium (such as heat transfer oil). Their working principle involves heat transfer through direct contact between the heating rail and the yarn, bringing the yarn to a plastic state above its glass transition temperature, thus reducing the stress required for tensile deformation. However, these traditional heating boxes exhibit significant energy consumption problems in practical applications: Firstly, the contact heating structure leads to uneven temperature distribution within the heating box, with localized overheating areas easily damaging the yarn, while low-temperature areas affect the plasticizing effect. To ensure overall processing quality, the set temperature of the heating box often needs to be increased, further increasing energy consumption. Secondly, the insulation structure design of the heating box has flaws, especially the frequent opening of the heating rail door, which causes a large amount of hot air to escape. According to industry test data, a single door opening can cause the internal temperature of the heating box to drop by 15-20°C, requiring additional electrical energy to reheat. Furthermore, the heating elements in traditional heating boxes have low energy efficiency ratios, with electrothermal conversion efficiencies generally below 85%. Long-term operation also leads to aging of the heating elements, resulting in reduced heat output and further exacerbating energy waste.

[0004] Industry statistics show that in conventional chemical fiber false-twist texturing production lines, the energy consumption of the heating box accounts for as much as 40%-60% of the total energy consumption. Taking a production line with an annual output of 5,000 tons of elastic yarn as an example, the annual electricity consumption of the heating box can reach 3-4.5 million kWh. Calculated at an industrial electricity price of 0.8 yuan / kWh, the annual energy cost exceeds 2.4 million yuan. With the intensification of competition in the chemical fiber industry, reducing energy consumption per unit of product has become a key breakthrough for enterprises to improve economic efficiency.

[0005] While existing technologies have attempted to improve thermal efficiency by optimizing the insulation material of the heating box (such as using ceramic fiber instead of traditional rock wool) or adding a hot air circulation system, these efforts are limited by the inherent defects of contact heating and have failed to fundamentally solve the problems of low heat utilization and poor temperature uniformity. In particular, the heating rail door, as a frequently operated component of the heating box, has not effectively controlled heat loss during its opening and closing process, becoming a bottleneck restricting the improvement of heating box energy efficiency. Therefore, developing a new heating box structure that combines high-efficiency insulation, precise temperature control, and low heat loss during opening and closing is of significant practical importance for reducing energy consumption in the false-twist deformation process and improving the industry's green manufacturing level. Utility Model Content

[0006] In view of this, this utility model proposes a lifting heating rail door and an energy-saving heating box for a false twisting deformation machine. Through structural optimization and innovation, the lower part of the door bottom plate is designed as an arc-shaped structure that fits the shape of the heating rail, with a radius of curvature of R20010±1mm. At the same time, the gap between the insulation covering structure and the heating rail is controlled within the range of 5-15mm, effectively suppressing air convection above the heating rail and significantly reducing heat loss. In addition, the redesigned lifting heating rail door structure ensures stable and smooth opening and closing operation even when the gap between the insulation covering structure and the heating rail is small, thereby aiming to solve some or all of the above-mentioned technical problems.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows, specifically including two aspects:

[0008] One aspect relates to a lifting and heating rail gate of a false twisting texturing machine, including a hot spot lifting unit, a heating rail gate assembly, and a connector. The hot spot lifting unit consists of two sets, which are disposed at both ends of the heating rail gate assembly. The hot spot lifting units are connected by the connector.

[0009] The popular lifting unit includes a connecting rod assembly, a mounting plate assembly, a lower connecting rod, an end plate assembly, and an elastic element. The connecting rod assembly and the lower connecting rod are arranged side by side. One end of each assembly is connected to the mounting plate assembly, and the other end is connected to the end plate assembly. Both ends of the connector are fixed to the connecting rod assembly. One end of the elastic element is connected to the mounting plate assembly, and the other end is connected to the end of the connector. The mounting plate assembly is set at the corresponding position of the external equipment. Preferably, the end plate assembly is set at both ends of the heating rail door assembly.

[0010] The heated door assembly includes a door panel and a bottom panel. The door panel and bottom panel are strip-shaped, and the bottom panel is fitted to the lower part of the door panel.

[0011] Preferably, the elastic element is a tension spring, and the connecting element is a connecting square tube. The elastic tension of the tension spring compensates for displacement deviations during the movement of the mechanism, ensuring the stability of the gap between the insulation covering structure and the hot rail during the lifting process; the connecting square tube provides rigid support, enhances structural strength, makes the lifting action smoother, and facilitates quick assembly with other components, such as connecting rods and door handle pins.

[0012] The structure of the popular lifting unit allows the heating rail door assembly to open and close normally even when the distance between the lower pressure plate and the hot rail is 5-15mm. While ensuring that the gap between the insulation covering structure and the hot rail is minimal to suppress convective heat dissipation, the transmission ratio and motion trajectory of the linkage mechanism are optimized to solve the jamming problem caused by the excessively small gap in traditional heating rail doors, achieving a balance between "low heat dissipation" and "easy operation".

[0013] In a structure that optimizes the aforementioned solution, the hot water lifting unit further includes a door handle pin and a handle. The door handle pin is connected to the lower end of a connector, and the handle is connected to the door handle pin. Preferably, the door handle pin is elongated and has a handle at its bottom. For situations where the hot water box is typically installed high up in the equipment, the elongated door handle pin, in conjunction with the handle, forms a lever operation structure. This allows operators to open and close the heating rail door using the handle without close contact with the high-temperature area, thereby improving operational safety and convenience, and is particularly suitable for automated assembly line operations.

[0014] In a structure that optimizes the aforementioned solution, a limiting end A is provided on the connecting rod assembly. The end of the connecting member is fixed to the connecting rod assembly via the limiting end A, and the limiting end A is positionally engaged with the mounting plate assembly. When the heating rail door is opened, the limiting end A contacts the mounting plate assembly, and the maximum opening angle of the heating rail door is limited by the mechanical limiting structure. This prevents the heating rail door from exceeding its opening limit, avoiding overload of the elastic element or exposure of the internal insulation layer of the heat box due to excessive opening. Simultaneously, it prevents the door from colliding with the heating rail and causing damage, ensuring the safe operation of the equipment.

[0015] In a structure that optimizes the aforementioned solution, the length of the connecting rod assembly is greater than the height of the heating rail door assembly. This ensures that the heating rail door assembly moves vertically during lifting, preventing damage caused by the lower part of the heating rail door assembly colliding with the outer shell of the heating chamber when the maximum opening is reached.

[0016] In a structure that optimizes the aforementioned solution, the surface of the door bottom plate has a mirror reflective film. By utilizing the high reflectivity of the mirror reflective film, the heat radiated from the heat rail to the door body is reflected back into the heat box, reducing radiative heat loss and simultaneously reducing the heat absorption and temperature rise of the door body itself, thereby indirectly improving the heat preservation performance of the heat box.

[0017] In a structure that optimizes the aforementioned solution, the heated rail door assembly further includes an upper pressure plate, a rock wool layer, a lower pressure plate, and a ceramic fiber layer. A rock wool layer is placed between the upper and lower pressure plates. The ceramic fiber layer covers the upper pressure plate, rock wool layer, and lower pressure plate, and the entire assembly is fixed to the door bottom plate. A multi-layer composite insulation structure (rock wool + ceramic fiber) blocks the heat conduction path: the rock wool layer uses its porous structure to suppress air convection, and the ceramic fiber layer, with its low thermal conductivity (<0.1 W / (m·K)), forms a thermal barrier, making the door an "insulating interface" of the heating chamber, maintaining a stable internal temperature even with frequent opening and closing. Even after adding an insulation unit to the lower part of the door bottom plate, and maintaining a distance of 5–15 mm between the insulation unit and the heating rail, the heated rail door assembly can still open and close normally.

[0018] In a structure that optimizes the aforementioned solution, the overall lower surface after encapsulation is arc-shaped along the strip direction to mate with the corresponding position of the external equipment. The heat rail is arc-shaped, and the arc-shaped lower surface after encapsulation matches the structure of the heat rail. Through the geometric fit between the arc surface and the heat rail, the right-angle gaps of the traditional planar structure are eliminated, so that the lower surface and the heat rail form a streamlined sealing interface. This not only reduces the gap between the heating rail door connector and the heat rail, but also effectively suppresses the upward convection of high-temperature air in the hot box along the gap, reducing heat loss caused by air flow.

[0019] In a structure that optimizes the aforementioned solution, the radius of curvature of the overall lower surface after covering is R20010±1mm, and the gap with the corresponding position of the external equipment is maintained at 5-15mm. The structure of the hot spot lifting unit achieves normal opening and closing of the heating rail door assembly within this gap range by precisely matching the radius of curvature of the hot rail and controlling the 5-15mm gap between the insulation covering structure and the hot rail. This design balances thermal contact efficiency and heat dissipation control at the microscale: too large a gap will lead to enhanced convection, while too small a gap may cause jamming due to thermal expansion. Thus, the optimal match between thermal efficiency and mechanical reliability is achieved through structural parameter optimization.

[0020] In a structure that optimizes the aforementioned solution, a limiting end B is provided on the door panel, which engages with a corresponding position of the external equipment. Specifically, when the heating rail door assembly is closed, the limiting end B engages with the outer shell of the heating chamber. This mechanical limiting ensures precise positioning of the door when closed, forming a tight seal and preventing gap deviations caused by uneven manual operation, further preventing hot air leakage from the joint between the door and the outer shell.

[0021] On the other hand, it also relates to an energy-saving heating box, which is composed of several heating box units arranged in parallel. The heating box unit includes a heating box shell, a support, a box body connector, and a lifting heating rail door. The support is set inside the heating box shell, and the box body connector is fixed on the support. The lifting heating rail door is fixed on the heating box shell through a mounting plate connector and cooperates with the corresponding positions of the heating box shell and the box body connector.

[0022] In a structure that optimizes the aforementioned solution, the energy-saving hot box is placed vertically, and the box assembly includes a liquid-filling pipe, a condenser pipe, and a heat rail. The condenser pipe is located on the upper part of the hot box shell, the liquid-filling pipe is located on the lower part of the hot box shell, and the heat rail connects the liquid-filling pipe and the condenser pipe.

[0023] Preferably, an insulation layer, which is an asbestos layer, is provided between the box assembly and the outer shell of the hot box. The asbestos layer (or equivalent insulation material) serves as the insulation layer between the main body and the outer shell of the hot box, blocking the conduction of heat from the box to the outside. This addresses the pain point of traditional hot boxes having "hot outer shells," reducing the heat load of the workshop environment and meeting industrial equipment safety protection standards.

[0024] Furthermore, one set of mounting plate connectors is fixed to the top of the hot box shell, and the other set is fixed to the bottom of the hot box shell. The upper and lower double-support fixing structure provides stable mechanical support for the lifting mechanism, avoiding the tilting or swaying of the door that may be caused by a single support point. It ensures that the insulation covering structure under the door bottom plate remains parallel to the hot rail during the lifting process, maintains uniform gap, and improves the reliability of the mechanism.

[0025] Compared with the prior art, the lifting heating rail door and energy-saving heat box of the false twisting deformer described in this utility model achieve a new type of lifting heating rail door structure and heat box that combines high-efficiency heat preservation, precise temperature control and low heat loss during opening and closing. The specific beneficial effects are as follows:

[0026] This invention designs the lower structure of the door base plate as an arc-shaped structure precisely matching the curvature (R20010±1mm) of the hot rail, and controls the gap between the lower structure and the hot rail to 5-15mm, forming a streamlined sealing interface. This effectively blocks the convective heat dissipation path of the high-temperature air inside the hot box. Experimental data shows that under the operating conditions of a room temperature of 22℃, a temperature rise to 180℃, and stable operation, compared with a traditional hot box (gap > 30mm, energy consumption 0.75kWh / hour), energy consumption is reduced by 41%, 53%, and 69% respectively when the gap is 15mm, 10mm, and 5mm, demonstrating significant energy-saving effects. The lifting mechanism increases linearly as the gap decreases. Simultaneously, the popular lifting unit employs a "connecting rod + elastic element + double fulcrum" structural design. Through the synergistic effect of elastic compensation from the tension spring and rigid support from the connecting square tube, it ensures stable opening and closing of the heated rail door even when the gap between the lower structure and the heated rail is as low as 5mm. Combined with a connecting rod length greater than the door height and mechanical limiting of the limit end A and the mounting plate assembly, the maximum opening of the door is limited, preventing structural damage and heat loss caused by excessive opening. The heated rail door assembly adopts a four-layer composite structure of "upper pressure plate + rock wool layer + lower pressure plate + ceramic fiber layer," with the rock wool layer suppressing internal air voids. Air convection and a ceramic fiber layer (thermal conductivity <0.1W / (m·K)) block conductive heat dissipation, making the door a highly efficient thermal insulation interface. Actual measurements show that the surface temperature of the door is more than 40% lower than that of a traditional single-layer steel plate, and the temperature drop during a single opening is ≤5℃, which is more than 60% better than the traditional structure. The mirror-reflective film (reflectivity >90%) covering the bottom plate reflects the radiant heat from the heat rail back into the heat box, reducing radiative heat loss and reducing the door's own heat absorption and temperature rise. This optimizes the uniformity of the temperature field inside the heat box, keeping the plasticizing temperature deviation of the filaments within ±2℃ (compared to ±5℃ in traditional heat boxes). The long door handle pin combined with the lever operation structure allows operators to open and close the door without close contact with the high-temperature area, reducing operating force by more than 50% compared to traditional methods. The limit end B cooperates with the outer shell of the hot box to ensure a precise seal when the door is closed. The energy-saving hot box adopts a vertically placed modular unit parallel structure, which reduces the power consumption of the circulating pump by about 15% by utilizing the natural convection characteristics of the heat medium. The asbestos insulation layer between the box joint and the outer shell reduces the overall heat loss of the hot box by more than 25%. The standardized unit design allows for flexible addition or reduction of the number of hot boxes on the production line to adapt to different production capacity requirements, and improves maintenance efficiency by 30%. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of the energy-saving heating box structure of the false twisting deformation machine described in this utility model.

[0029] Figure 2This is a schematic diagram of the cross-sectional structure of the energy-saving hot box of the false twisting deformation machine described in this utility model.

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the heating rail door assembly described in this utility model.

[0031] Figure 4 This is a schematic diagram of the operation when the hot rail door of the energy-saving hot box described in this utility model is closed.

[0032] Figure 5 This is a schematic diagram of the operation when the heat rail door of the energy-saving heat box described in this utility model is fully opened.

[0033] Figure 6 This is a schematic diagram of the structure of the popular lifting unit described in this utility model.

[0034] Figure 7 This is a schematic diagram of the end plate connector structure described in this utility model.

[0035] Figure 8 This is a schematic diagram of the connecting rod assembly structure described in this utility model.

[0036] Figure 9 This is a schematic diagram of the mounting plate assembly structure of this utility model.

[0037] Figure 10 This is a partial structural diagram of the hot box unit described in this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Hot box outer shell, 2. Support frame, 3. Box assembly, 4. Hot water lifting unit, 5. Heating rail door assembly.

[0040] 31. Liquid container, 32. Condenser, 33. Hot rail.

[0041] 41. Linkage assembly; 42. Mounting plate assembly; 43. Lower link; 44. End plate assembly; 45. Connector; 46. Elastic component; 47. Door handle pin; 48. Handle; 411. Limiting end A.

[0042] 51. Door panel, 52. Door bottom panel, 53. Upper pressure plate, 54. Rock wool layer, 55. Lower pressure plate, 56. Ceramic fiber layer, 511. Limiting end B. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] like Figure 1-10As shown, a lifting and heating rail gate of a false twisting deformer consists of two sets of hot-hot lifting units 4, heating rail gate couplings 5, and connecting parts 45. The hot-hot lifting unit 4 adopts a composite transmission structure of "connecting rod + elastic element". The connecting rod coupling 41 and the lower connecting rod 43 are arranged side-by-side, with one end hinged to the mounting plate coupling 42 via a pin, and the other end connected to the end plate coupling 44, forming a four-bar linkage to ensure free lifting and lowering of the gate. The elastic element 46 is a tension spring, with one end hooked to the mounting hole of the mounting plate coupling 42, and the other end connected to the rectangular hollow square tube. The lugs at the ends of connector 45 are connected to compensate for gap deviations during the movement of the elastic tension mechanism to avoid jamming caused by thermal expansion. Both ends of connector 45 are bolted to the middle of the connecting rod assembly 41, serving both structural support and handle installation functions. The heated rail door assembly 5 adopts an "arc-shaped seal + multi-layer insulation" design. The lower surface of the composite insulation layer fixed to the bottom of the door base plate 52 is machined into an arc shape with a radius of curvature R20010±1mm. This arc-shaped surface forms a 0.5mm mechanical fit tolerance with the arc-shaped surface of the heated rail 33. (Closing time...) The gap is controlled at 5-15mm, and convective heat dissipation is suppressed through a streamlined interface. Its composite insulation layer consists of an upper pressure plate 53, a rock wool layer 54, a lower pressure plate 55, and a ceramic fiber layer 56. The rock wool layer fills between the upper and lower pressure plates, and the ceramic fiber layer covers the entire structure, reducing the door's thermal conductivity to below 0.05W / (m·K) and surface temperature to ≤50℃. Furthermore, a mirror-reflective film (92% reflectivity) is attached to the inner surface of the door bottom plate 52 using a vacuum sputtering process, reflecting the radiant heat from the heat rail back into the heat box to reduce radiant heat loss by approximately 30%. (Operation and Safety) Structurally, the door handle pin 47 is a long rod-shaped structure, with its upper end threaded to the lower end of the connector 45 and its bottom end connected to the handle 48, forming a lever transmission mechanism to reduce the actual opening and closing force. The limiting end A411 is a boss structure at the top of the connecting rod connector 41, which contacts the limiting groove of the mounting plate connector 42 when the door is opened to its maximum angle (approximately 60°) to prevent over-opening and overloading of the tension spring. The limiting end B511 is a stepped protrusion on the edge of the door panel 51, which embeds into the mating part of the hot box shell 1 when closed, forming a mechanical seal to ensure that the leakage of the door gap is ≤0.5m. 3 / h.

[0048] On the other hand, the energy-saving heating box is composed of 3 to 6 independent heating box units arranged in parallel. In a single unit, the outer shell 1 of the heating box adopts a double-layer 2mm thick steel plate sandwich structure, with a 50mm thick asbestos insulation layer (thermal conductivity ≤0.1W / (m·K)) filling the middle, so that the surface temperature of the outer shell is ≤40℃; the box assembly 3 is fixed to the middle of the outer shell by the bracket 2, including a liquid collection pipe 31 at the bottom, a condenser pipe 32 at the top, and an arc-shaped insulation covering structure at the bottom of the door 52 to form a contact heating interface. The hot rail 33; the mounting plate of the lifting mechanism is divided into upper and lower groups, with the upper group fixed to the top of the hot box shell 1 and the lower group fixed to the bottom, forming a double support point in the vertical direction. By adjusting the connecting rod 41, which is 100mm longer than the height of the heating rail door assembly 5, the verticality deviation of the door body during lifting is controlled to be ≤0.2mm / m, ensuring the uniformity of the gap between the door bottom plate 52 and the hot rail 33; in terms of heat medium circulation and energy efficiency optimization, each hot box unit is connected in parallel, and the number of units can be increased or decreased according to the production capacity requirements.

[0049] The energy-saving heat box achieves reduced energy consumption and improved maintenance efficiency through "modular layout + natural convection + dual-support stability". The combination of the two forms a complete energy-saving solution. According to actual measurements, the overall energy consumption is reduced by 55% to 70% compared with traditional equipment, meeting the green manufacturing needs of the textile industry.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting and heating rail gate for a false-twist texturing machine, characterized in that: It includes a hot spot lifting unit (4), a heating rail door assembly (5), and a connector (45). The hot spot lifting unit (4) consists of two sets, which are set at both ends of the heating rail door assembly (5). The hot spot lifting units (4) are connected by the connector (45). The popular lifting unit (4) includes a connecting rod assembly (41), a mounting plate assembly (42), a lower connecting rod (43), an end plate assembly (44), and an elastic element (46). The connecting rod assembly (41) and the lower connecting rod (43) are arranged side by side. One end of the two components is connected to the mounting plate assembly (42), and the other end is connected to the end plate assembly (44). The two ends of the connector (45) are fixed on the connecting rod assembly (41) respectively. One end of the elastic element (46) is connected to the mounting plate assembly (42), and the other end is connected to the end of the connector (45). The mounting plate assembly (42) is set at the corresponding position of the external equipment, and the end plate assembly (44) is set at both ends of the heating rail door assembly (5). The heated rail door assembly (5) includes a door panel (51) and a door bottom plate (52). The door panel (51) and the door bottom plate (52) are strip-shaped, and the door bottom plate (52) is fitted to the lower part of the door panel (51).

2. The lifting and heating rail gate of the false twisting deformation machine according to claim 1, characterized in that: The hot spot lifting unit (4) also includes a door handle pin (47) and a handle (48). The door handle pin (47) is connected to the lower end of the connector (45), and the handle (48) is connected to the door handle pin (47).

3. The lifting and heating rail gate of the false twisting texturing machine according to claim 1, characterized in that: The connecting rod assembly (41) is provided with a limiting end A (411), and the end of the connecting member (45) is fixed on the connecting rod assembly (41) through the limiting end A (411). The limiting end A (411) is in position with the mounting plate assembly (42).

4. The lifting and heating rail gate of the false twisting deformation machine according to claim 1, characterized in that: The length of the connecting rod assembly (41) is greater than the height of the heating rail door assembly (5).

5. The lifting and heating rail gate of the false-twist texturing machine according to claim 1, characterized in that: The bottom plate (52) of the door has a mirror-reflective film on its surface.

6. The lifting and heating rail gate of the false-twist texturing machine according to claim 1, characterized in that: The heated rail door assembly (5) also includes an upper pressure plate (53), a rock wool layer (54), a lower pressure plate (55), and a ceramic fiber layer (56). A rock wool layer (54) is provided between the upper pressure plate (53) and the lower pressure plate (55). The ceramic fiber layer (56) covers the upper pressure plate (53), the rock wool layer (54), and the lower pressure plate (55). The entire assembly after covering is fixed on the door bottom plate (52).

7. The lifting and heating rail gate of the false-twist texturing machine according to claim 6, characterized in that: The overall lower surface after being covered is arc-shaped along the strip direction to match the corresponding position of the external equipment.

8. The lifting and heating rail gate of the false-twist texturing machine according to claim 7, characterized in that: The radius of curvature of the overall lower surface after the covering is R20010±1mm, and the gap with the corresponding position of the external equipment is maintained at 5-15mm.

9. The lifting and heating rail gate of the false-twist texturing machine according to claim 1, characterized in that: The door panel (51) is provided with a limiting end B (511), which is matched with the corresponding position of the external equipment.

10. An energy-saving heating box, comprising several heating box units arranged in parallel, characterized in that: The hot box unit includes a hot box shell (1), a bracket (2), a box assembly (3), and a lifting heating rail door as described in any one of claims 1-9. The bracket (2) is installed inside the hot box shell (1), and the box assembly (3) is fixed on the bracket (2). The lifting heating rail door is fixed on the hot box shell (1) by a mounting plate assembly (42) and cooperates with the corresponding positions of the hot box shell (1) and the box assembly (3).

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