A polyurethane foaming device for a refrigerated van

Abstract

The utility model relates to foaming production technical field discloses a kind of polyurethane foaming device of refrigeration insulated van, including fixed bracket, two support frames being respectively arranged in the left and right sides of fixed bracket and can reciprocate in left and right directions, and movable frame being arranged in the outside of support frame and can reciprocate in up and down direction;Movable frame includes first foaming frame, second foaming frame, third foaming frame and fourth foaming frame around two support frames and mutually interval distance arrangement;Movable frame front end is provided with the front end foaming frame that can reciprocate in front and back direction.The utility model is set by setting fixed bracket, and the foaming frame that can be telescopic is set around fixed bracket, realizes closed whole polyurethane foaming, will improve the sealing property and integrity of traditional assembly, and greatly prolong its service life, and improve the foaming efficiency, can be foamed in the van of multiple sizes.

Description

Technical Field

[0001] This utility model relates to the field of foam production technology, specifically to a polyurethane foaming device for refrigerated and insulated truck compartments. Background Technology

[0002] Foaming technology is mainly used to manufacture the bodies of refrigerated or insulated trucks. These bodies can be used to transport pharmaceutical goods such as vaccines and biological products, medicines and medical devices; food goods such as frozen foods, fresh fruits and vegetables, dairy products and beverages; and chemical and industrial goods such as precision chemicals and industrial equipment. Cargo bodies using foaming technology not only improve thermal insulation performance, but also take into account sound insulation, shock absorption, lightweighting and durability. Existing foaming devices for refrigerated truck compartments rely on a single foaming unit to sequentially foam multiple surfaces within the compartment, such as the utility model patent CN221365525U entitled "A Closed-Loop Foaming Tooling for Refrigerated Trucks." However, this method is inefficient and lacks integrity. Other foaming devices can foam multiple surfaces simultaneously, such as the Chinese invention patent CN119821523A entitled "A Lightweight Foaming Process for Refrigerated Meat Hook Truck Structure and Its Manufacturing Process," which enables integral foaming. Since the development of the first refrigerated truck in 1938, airtightness has been a crucial research topic. Achieving closed-loop integral polyurethane foaming would improve the airtightness and integrity of traditional assembly and significantly extend its service life. However, this solution cannot adjust the distance between the foaming frame and the inner wall of the compartment, limiting its use. Therefore, a foaming device that is convenient to foam and can adapt to various sizes of truck compartments is needed. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a polyurethane foaming device for refrigerated and insulated carriages. By setting a fixed frame and a retractable foaming frame around the fixed frame, the foaming efficiency is improved and foaming can be carried out in carriages of various sizes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a polyurethane foaming device for a refrigerated and insulated car body, comprising a fixed frame, two support frames respectively arranged on the left and right sides of the fixed frame and capable of reciprocating in the left and right directions, and a movable frame arranged on the outside of the support frames and capable of reciprocating in the up and down directions. The active frame includes a first foam frame, a second foam frame, a third foam frame, and a fourth foam frame arranged around two support frames and spaced apart from each other; The activity frame front-end settings are a front-end bubble frame that can move back and forth in the forward and backward directions.

[0005] Furthermore, the fixed frame includes an upright frame, a base plate fixed to the bottom of the upright frame, and a horizontal frame fixed to the front end of the upright frame and set horizontally; the support frame and the movable frame are both set on the outside of the horizontal frame.

[0006] Furthermore, a first drive structure is provided on the horizontal frame and the support frame; the first drive structure includes a first fixed cylinder horizontally fixed on the horizontal frame, a first movable cylinder horizontally fixed on the support frame and sleeved with the first fixed cylinder, and a first power telescopic component disposed in the first fixed cylinder and the first movable cylinder; the left and right movable ends of the first power telescopic component are respectively connected to the first movable cylinders on the two support frames; the first movable cylinder is slidably connected to the first fixed cylinder; at least one set of the first drive structure is provided.

[0007] Furthermore, the support frame is provided with at least one set of second driving structures corresponding to the first foam frame, the second foam frame, the third foam frame, and the fourth foam frame respectively; the second driving structure corresponding to the first foam frame includes a second fixed cylinder vertically fixedly installed on the support frame, a second movable cylinder vertically fixed on the first foam frame and sleeved with the second fixed cylinder, and a second power telescopic component disposed in the second fixed cylinder and the second movable cylinder; the second power telescopic component is fixedly connected to the second fixed cylinder; the movable end of the second power telescopic component is connected to the second movable cylinder; the second movable cylinder is slidably connected to the second fixed cylinder.

[0008] Furthermore, a front-end telescopic component is fixedly installed at the front end of each of the first, second, third, and fourth foam frames. The front-end telescopic component corresponding to the first foam frame includes a third fixed cylinder fixed at the front end of the first foam frame; a third movable cylinder is sleeved inside the third fixed cylinder, and the front end of the third movable cylinder is fixedly connected to the front-end foam frame; a front-end power telescopic component is provided inside the third fixed cylinder and the third movable cylinder, with one end of the front-end power telescopic component fixed to the third fixed cylinder and the other end connected to the third movable cylinder.

[0009] Furthermore, both the upper and lower ends of the first and second power telescopic components are provided with connecting plates, which are connected to the movable frame.

[0010] Furthermore, a gap telescopic frame is provided between the first foam frame and the third foam frame; the gap telescopic frame includes four connecting rods that are hinged in sequence; two connection points distributed vertically on the four connecting rods are respectively connected to the first foam frame and the third foam frame; a gap telescopic frame is provided between the second foam frame and the fourth foam frame.

[0011] Furthermore, an anti-slip component is provided at the movable end of the first power telescopic component and at the first movable cylinder; an anti-slip component is provided at the movable end of the second power telescopic component and at the second movable cylinder; and an anti-slip component is provided at the movable end of the front power telescopic component and at the third movable cylinder.

[0012] Furthermore, the anti-slip component corresponding to the first movable cylinder includes a strip-shaped hole opened along the length direction on the side of the first movable cylinder and a limiting shaft that is perpendicular to the first power telescopic component and connected to its movable end; the end of the limiting shaft is located in the strip-shaped hole and slidably connected thereto.

[0013] Furthermore, the anti-slip component corresponding to the first movable cylinder includes a telescopic component fixedly installed on the first movable cylinder or support frame, a spacer block connected to the movable end of the telescopic component, and springs connected at both ends to the first power telescopic component and the first movable cylinder respectively; the anti-slip components corresponding to the second movable cylinder and the third movable cylinder have the same structure as the anti-slip component corresponding to the first movable cylinder.

[0014] The beneficial effects of this utility model are as follows: by setting a fixed frame and a retractable foaming frame around the fixed frame, the closed-loop integral polyurethane foaming improves the sealing and integrity of traditional assembly, greatly extends its service life, improves foaming efficiency, and can foam in carriages of various sizes; according to the size of the carriage, the distance between the four foaming frames and the inner wall of the carriage can be adjusted for foaming. During recycling, multiple foaming frames can be recycled at the same time or one by one, ensuring the foaming effect and reducing the adhesion between the foaming frames and the foaming surface when they detach. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the left-view structure; Figure 4 A schematic diagram of the adjustable frame structure; Figure 5 This is a schematic diagram of the rear view structure; Figure 6 This is a first connection method between the first power telescopic component and the first movable cylinder, taking the first movable cylinder as an example; Figure 7 This is a second connection method between the first power telescopic component and the first movable cylinder, taking the first movable cylinder as an example.

[0016] In the diagram: 1. Base plate; 2. Vertical frame; 3. Horizontal frame; 4. Support frame; 5. First foam frame; 6. Second foam frame; 7. Third foam frame; 8. Fourth foam frame; 9. Front foam frame; 10. Front cylinder; 11. First fixed cylinder; 12. First movable cylinder; 13. Second fixed cylinder; 14. Second movable cylinder; 15. Connecting plate; 16. Gap telescopic frame; 17. Strip hole; 18. Limiting shaft; 19. Spacer cylinder; 20. Spacer block; 21. Spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0019] Example 1: like Figures 1-6 As shown, a polyurethane foaming device for a refrigerated and insulated truck compartment includes a fixed frame, two support frames 4 respectively arranged on the left and right sides of the fixed frame and capable of reciprocating in the left and right directions, and a movable frame arranged outside the support frames 4 and capable of reciprocating in the up and down directions; the fixed frame is fixed to the ground or other equipment to ensure that its position is fixed during operation. The active frame includes a first foam frame 5, a second foam frame 6, a third foam frame 7, and a fourth foam frame 8 arranged around two support frames 4 at intervals; the first foam frame 5 and the third foam frame 7 are arranged on the outer side of the left support frame 4, with the first foam frame 5 located on top; the second foam frame 6 and the fourth foam frame 8 are arranged on the outer side of the right support frame 4, with the second foam frame 6 located on top. The activity frame front-end settings allow the front-end foaming frame to move back and forth in the forward and backward directions.

[0020] like Figure 3 As shown, the figure is defined as the left view, the left end of the figure is defined as the rear end of this technical solution, and the right end of the figure is defined as the front end; the outer side and inner side in this application refer to the side of the feature that is away from or close to the horizontal frame 3, such as the right side and the upper side of the second foam frame 6, which are the outer side, and the opposite side is the inner side; the front side of the front foam frame 9 is its outer side.

[0021] The fixed frame includes a vertically arranged upright frame 2, a base plate 1 fixed to the bottom of the upright frame 2, and a horizontal frame 3 fixed to the front end of the upright frame 2 and arranged horizontally; the support frame 4 and the movable frame are both arranged on the outside of the horizontal frame 3.

[0022] In this embodiment, the first power telescopic component is a first bidirectional telescopic hydraulic cylinder or two first unidirectional hydraulic cylinders; the second power telescopic component is a second bidirectional telescopic hydraulic cylinder or two second unidirectional hydraulic cylinders; and the front-end power telescopic component is a front-end cylinder 10.

[0023] A first drive structure is provided on the horizontal frame 3 and the support frame 4. The first drive structure includes a first fixed cylinder 11 horizontally fixed on the horizontal frame 3, a first movable cylinder 12 horizontally fixed on the support frame 4 and sleeved with the first fixed cylinder 11, and a first bidirectional telescopic hydraulic cylinder or two non-interfering first unidirectional hydraulic cylinders disposed in the first fixed cylinder 11 and the first movable cylinder 12, the movable ends of which are respectively connected to the first movable cylinders 12 on the two support frames 4. The cylinder barrels of the first bidirectional telescopic hydraulic cylinder and the two first unidirectional hydraulic cylinders are all fixedly connected to the first fixed cylinder 11. The left and right movable ends of the first bidirectional telescopic hydraulic cylinder are respectively connected to the first movable cylinders 12 on the two support frames 4. The first movable cylinder 12 is slidably connected to the first fixed cylinder 11. At least one set of the first drive structure is provided. The first bidirectional telescopic hydraulic cylinder enables the four foam frames to adjust the distance in the horizontal direction. The two non-interfering hydraulic cylinders are provided in the same first fixed cylinder 11 to ensure that the telescopic extension of the two support frames does not interfere with each other.

[0024] The support frame 4 is provided with at least one set of second driving structures corresponding to the first foam frame 5, the second foam frame 6, the third foam frame 7, and the fourth foam frame 8, respectively. The second driving structure corresponding to the first foam frame 5 includes a second fixed cylinder 13 vertically fixed on the support frame 4, a second movable cylinder 14 vertically fixed on the first foam frame 5 and sleeved with the second fixed cylinder 13, and a second bidirectional telescopic hydraulic cylinder or a second one-way hydraulic cylinder whose movable end is connected to the first foam frame 5, both disposed within the second fixed cylinder 13 and the second movable cylinder 14. The cylinder barrel of the second bidirectional telescopic hydraulic cylinder or the second one-way hydraulic cylinder is fixedly connected to the second fixed cylinder 13. The movable ends of the second bidirectional telescopic hydraulic cylinder or the second one-way hydraulic cylinder are both connected to the second movable cylinder 13. The movable cylinder 14 is connected to the movable end, i.e., the piston rod end; the second movable cylinder 14 is slidably connected to the second fixed cylinder 13; the second drive structures corresponding to the second foaming frame 6, the third foaming frame 7, and the fourth foaming frame 8 are all the same as described above; the upper and lower movable ends of the second bidirectional telescopic hydraulic cylinder located on the left are respectively connected to the second movable cylinder 14 corresponding to the first foaming frame 5 and the third foaming frame 7, and the upper and lower movable ends of the second bidirectional telescopic hydraulic cylinder located on the right are respectively connected to the second movable cylinder 14 corresponding to the second foaming frame 6 and the fourth foaming frame 8; when the second unidirectional hydraulic cylinder is used, the second unidirectional hydraulic cylinder corresponding to the first foaming frame 5 and the second unidirectional hydraulic cylinder corresponding to the third foaming frame 7 are located in the same second fixed cylinder 13.

[0025] The second bidirectional telescopic hydraulic cylinder enables the four foam frames to be vertically adjusted to maintain their distance from the inner wall of the carriage. The support frame 4 has an L-shaped vertical cross-section and consists of two sections: one horizontally positioned above the horizontal frame 3, and the other vertically positioned to the left or right of the horizontal frame 3. The four foam frames also have L-shaped vertical cross-sections and consist of two sections: one section of the first foam frame 5 and the third foam frame 7 is positioned above the horizontal frame 3, and the other vertically positioned to the left or right of the horizontal frame 3. One section of the second foam frame 6 and the fourth foam frame 8 is positioned below the horizontal frame 3, and the other vertically positioned to the left or right of the horizontal frame 3. The upper movable end of the second bidirectional telescopic hydraulic cylinder pushes the top of the first foam frame 5 and the second foam frame 6, and the lower movable end pushes the bottom of the third foam frame 7 and the fourth foam frame 8 to connect them.

[0026] Each of the first foam frame 5, the second foam frame 6, the third foam frame 7, and the fourth foam frame 8 has a front telescopic component fixedly installed at its front end. The front telescopic component corresponding to the first foam frame 5 includes a third fixed cylinder fixed at the front end of the first foam frame 5; a third movable cylinder is sleeved inside the third fixed cylinder, and the front end of the third movable cylinder is fixedly connected to the front foam frame 9; a front cylinder 10 is provided inside the third fixed cylinder and the third movable cylinder, one end of the front cylinder 10 is fixed on the third fixed cylinder, and the other end is connected to the third movable cylinder; the front foam frame 9 realizes the foam arrangement at the front end of the inner wall of the carriage, and the front cylinder 10 realizes the adjustment of the front foam frame 9 in the front-rear direction.

[0027] Connecting plates 15 are provided at both ends of the first bidirectional telescopic hydraulic cylinder and at both ends of the second bidirectional telescopic hydraulic cylinder. The connecting plates 15 are connected to the movable frame. The connecting plates 15 are located on the outside of the corresponding movable cylinder.

[0028] A gap telescopic frame 16 is provided between the first foam frame 5 and the third foam frame 7; the gap telescopic frame 16 includes four connecting rods that are hinged in sequence; the two connection points of the four connecting rods, which are distributed vertically, are respectively connected to the first foam frame 5 and the third foam frame 7; the gap telescopic frame 16 is provided between the second foam frame 6 and the fourth foam frame 8; the gap telescopic frame 16 is set vertically and is located on the same vertical plane as the outer side of the foam frame; the gap telescopic frame 16 makes the two foam frames on the same support frame 4 more stable when moving up and down.

[0029] The movable end of the first bidirectional telescopic hydraulic cylinder or the first unidirectional hydraulic cylinder is provided with an anti-detachment sliding component at the first movable cylinder 12, which allows the two to slide together and restricts the movable end of the first bidirectional telescopic hydraulic cylinder or the first unidirectional hydraulic cylinder inside the first movable cylinder 12; the movable end of the second bidirectional telescopic hydraulic cylinder or the second unidirectional hydraulic cylinder is provided with an anti-detachment sliding component at the second movable cylinder 14, which allows the two to slide together and restricts the movable end of the second bidirectional telescopic hydraulic cylinder or the second unidirectional hydraulic cylinder inside the second movable cylinder 14; the movable end of the front cylinder is provided with an anti-detachment sliding component at the third movable cylinder, which allows the two to slide together and restricts the movable end of the front cylinder inside the third movable cylinder, and the anti-detachment sliding components for the three movable cylinders have the same structure.

[0030] The anti-slip component corresponding to the first movable cylinder 12 includes a through-hole 17 extending from the side of the first movable cylinder 12 along its length (left-right direction), or up-down direction for the second movable cylinder, or front-back direction for the third movable cylinder, as well as a limiting shaft 18 perpendicular to the first bidirectional telescopic hydraulic cylinder or the first unidirectional hydraulic cylinder and connected to its movable end. The end of the limiting shaft 18 is located inside the through-hole 17 and slidably connected to it. By setting the through-hole 17 and the limiting shaft 18, the cylinder must first extend or retract a certain length when driving the corresponding movable cylinder. In this way, during demolding, the cylinder can first retract a certain distance, so that the foaming frame is not subjected to the thrust of the cylinder, thereby ensuring that there is no external force between the foaming frame and the completed foamed surface, further facilitating demolding, reducing adhesion, and ensuring the integrity of the foaming.

[0031] During operation, the first foaming frame 5, the second foaming frame 6, the third foaming frame 7, and the fourth foaming frame 8 are initially held tightly together vertically, while the gap telescopic frame 16 is compressed vertically. The support frame 4 is pressed against the horizontal frame 3. The front-end cylinder 10, the first bidirectional telescopic hydraulic cylinder, and the second bidirectional telescopic hydraulic cylinder are in a retracted state. Then, according to the preset foaming thickness, the front-end cylinder 10, the first bidirectional telescopic hydraulic cylinder, and the second bidirectional telescopic hydraulic cylinder are extended. Finally, detachable connections are made to the outside of the first foaming frame 5, the second foaming frame 6, the third foaming frame 7, the fourth foaming frame 8, and the front-end foaming frame 9. The installation method for the lower side of the inner template and foam frame is as follows: it can be directly installed on the lower side of the foam frame or an inner template can be laid at a certain distance on the bottom surface of the carriage, corresponding to the lower side of the foam frame. When laying an inner template on the bottom surface of the carriage, foam can be first applied between the bottom of the carriage and the inner template at that location. After completion, the foam frame can be placed into the carriage or the carriage can be moved and fitted over the foam frame. Alternatively, the inner template can be installed at a preset distance on the bottom of the carriage, and foaming can be performed as a whole after the foam frame is inside the carriage. If the inner template is installed on the lower side of the foam frame, foaming can be performed after the foam frame is inside the carriage. The vehicle is then started, and the detachable van is fitted over the movable frame. The inner template and the foam frame are connected by detachable fixing components; these components include suction cups fixed to the foam frame; the suction cups adhere to the five inner templates, and once foaming is complete, the suction cups detach from the inner templates, forming an integral part of the inner templates and the foam surface; the detachable fixing components can also be fixed in other ways, such as by wrapping with tape or wire; alternatively, the five inner templates can be connected to each other to indirectly achieve detachable fixing.

[0032] When starting the front-end cylinder 10, the first bidirectional telescopic hydraulic cylinder, and the second bidirectional telescopic hydraulic cylinder, they can be started simultaneously, or one or two of them can be selectively started to extend to a predetermined distance from the inner wall of the carriage, and then foaming can begin between the outer side of the five foaming frames and the inner wall of the carriage. When the first bidirectional telescopic hydraulic cylinder is replaced by two first unidirectional hydraulic cylinders, and the second bidirectional telescopic hydraulic cylinder is replaced by two first unidirectional hydraulic cylinders, all of them can be started, or only a portion of them can be started, such as only extending the left support frame 4 horizontally, and only pushing the right second foaming frame 6 and / or the fourth foaming frame 8 vertically.

[0033] After foaming is completed, the inner template and the foaming surface are integrally formed. Due to the barrier of the inner template, it is further ensured that the foaming surface does not stick to the foaming frame. The movable frame and the front foaming frame 9 shrink at the same time. If the simultaneous shrinkage will affect the foaming effect, they can shrink sequentially. For example, the upper foaming frame 5 and the second foaming frame 6 shrink downwards and then shrink horizontally.

[0034] In addition, since direct shrinkage may affect the foaming effect, an anti-slip component is set up. When the first power telescopic component, the second power telescopic component and the front power telescopic component shrink, they first move within the strip hole 17, but do not move with the movable cylinder. This makes the foaming frame and the foaming surface have no force. Then, depending on the situation, the five foaming frames continue to shrink simultaneously, or continue to shrink sequentially, or continue to shrink partially simultaneously until demolding is completed.

[0035] Example 2: like Figure 7As shown, unlike Embodiment 1, the anti-slip component corresponding to the first movable cylinder 12 includes a telescopic component fixedly installed on the first movable cylinder 12 or the support frame 4, a spacer block 20 connected to the movable end of the telescopic component and used to block the first power telescopic component from contacting the first movable cylinder 12, and a spring 21 whose two ends are respectively connected to the first power telescopic component and the first movable cylinder 12. The connection method of the spring 21 is as follows: taking the first movable cylinder 12 as an example, hanging holes are opened at the end of the first power telescopic component and the end face of the first movable cylinder 12 away from it, and hooks are respectively provided at both ends of the spring 21, and the two hooks are respectively connected to the two hanging holes. The telescopic component is a spacer cylinder 19, and the first power telescopic component is perpendicular to its corresponding spacer cylinder 19. The first movable cylinder 12 has through holes corresponding to the positions of the spacer cylinder 19 and the spacer block 20, so that the movable end of the spacer cylinder 19 can extend into the interior of the first movable cylinder 12, thereby pressing the spacer block 20 between the movable end of the first power telescopic component and the inner wall of the first movable cylinder 12. The installation position of the spring 21 does not interfere with the spacer block 20 extending between the movable end of the first power telescopic component and the inner wall of the end of the first movable cylinder 12. The anti-slip components corresponding to the second movable cylinder 14 and the third movable cylinder have the same structure as the anti-slip components corresponding to the first movable cylinder 12. The spacer block 20 has a rectangular or triangular cross-section or a combination thereof. The spacer cylinders 19 corresponding to the first and third movable cylinders are generally vertically arranged, and the spacer cylinder 19 corresponding to the second movable cylinder 14 is generally horizontally arranged.

[0036] During operation, taking the first movable cylinder 12 as an example, the spacer cylinder 19 first extends so that the spacer block 20 is located between the movable end of the first power telescopic component and the inner wall of the first movable cylinder 12. Then, the first power telescopic component extends to push the spacer block 20, which in turn pushes the first movable cylinder 12, and then pushes the support frame 4. After foaming is completed, the spacer block 20 is first retracted from between the movable end of the first power telescopic component and the inner wall of the first movable cylinder 12.

[0037] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A polyurethane foaming device for a refrigerated and insulated truck compartment, characterized in that: Includes a fixed frame, two support frames (4) respectively set on the left and right sides of the fixed frame and capable of reciprocating in the left and right directions, and a movable frame set on the outside of the support frame (4) and capable of reciprocating in the up and down directions; The active frame includes a first foam frame (5), a second foam frame (6), a third foam frame (7), and a fourth foam frame (8) arranged around the two support frames (4) and spaced apart from each other. The active frame is equipped with a front foam frame (9) that can move back and forth in the front-to-back direction.

2. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 1, characterized in that: The fixed frame includes an upright frame (2), a base plate (1) fixed to the bottom of the upright frame (2), and a horizontal frame (3) fixed to the front end of the upright frame (2) and set horizontally; the support frame (4) and the movable frame are both set on the outside of the horizontal frame (3).

3. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 2, characterized in that: A first driving structure is provided on the horizontal frame (3) and the support frame (4); the first driving structure includes a first fixed cylinder (11) horizontally fixed on the horizontal frame (3), a first movable cylinder (12) horizontally fixed on the support frame (4) and sleeved with the first fixed cylinder (11), and a first power telescopic component disposed in the first fixed cylinder (11) and the first movable cylinder (12); the left and right movable ends of the first power telescopic component are respectively connected to the first movable cylinder (12) on the two support frames (4); the other end of the first power telescopic component is connected to the first fixed cylinder; the first movable cylinder (12) is slidably connected to the first fixed cylinder (11); at least one set of the first driving structure is provided.

4. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 3, characterized in that: The support frame (4) is provided with at least one set of second driving structures corresponding to the first foam frame (5), the second foam frame (6), the third foam frame (7) and the fourth foam frame (8); the second driving structure corresponding to the first foam frame (5) includes a second fixed cylinder (13) vertically fixed on the support frame (4), a second movable cylinder (14) vertically fixed on the first foam frame (5) and sleeved with the second fixed cylinder (13), and a second power telescopic component disposed in the second fixed cylinder (13) and the second movable cylinder (14); the second power telescopic component is fixedly connected to the second fixed cylinder (13); the movable end of the second power telescopic component is connected to the second movable cylinder (14); the other end of the second power telescopic component is connected to the second fixed cylinder (13); the second movable cylinder (14) is slidably connected to the second fixed cylinder (13).

5. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 4, characterized in that: Each of the first foam frame (5), the second foam frame (6), the third foam frame (7), and the fourth foam frame (8) has a front telescopic component fixedly installed at its front end. The front telescopic component corresponding to the first foam frame (5) includes a third fixed cylinder fixed at the front end of the first foam frame (5); a third movable cylinder is sleeved inside the third fixed cylinder, and the front end of the third movable cylinder is fixedly connected to the front foam frame (9); a front power telescopic component is provided inside the third fixed cylinder and the third movable cylinder, and one end of the front power telescopic component is fixed on the third fixed cylinder and the other end is connected to the third movable cylinder.

6. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 5, characterized in that: An anti-slip component is provided at the movable end of the first power telescopic component and at the first movable cylinder (12); an anti-slip component is provided at the movable end of the second power telescopic component and at the second movable cylinder (14); an anti-slip component is provided at the movable end of the front power telescopic component and at the third movable cylinder.

7. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 6, characterized in that: The anti-slip component corresponding to the first movable cylinder (12) includes a strip hole (17) opened along the length direction on the side of the first movable cylinder (12) and a limiting shaft (18) that is perpendicular to the first power telescopic component and connected to its movable end; the end of the limiting shaft (18) is located in the strip hole (17) and slidably connected thereto; the anti-slip component corresponding to the second movable cylinder (14) and the anti-slip component corresponding to the third movable cylinder have the same structure as the anti-slip component corresponding to the first movable cylinder (12).

8. The polyurethane foaming device for a refrigerated and insulated truck compartment according to claim 6, characterized in that: The anti-slip component corresponding to the first movable cylinder (12) includes a telescopic component fixedly installed on the first movable cylinder (12) or the support frame (4), a spacer block (20) connected to the movable end of the telescopic component, and a spring (21) whose two ends are respectively connected to the first power telescopic component and the first movable cylinder (12); the anti-slip component corresponding to the second movable cylinder (14) and the anti-slip component corresponding to the third movable cylinder have the same structure as the anti-slip component corresponding to the first movable cylinder (12).

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