A construction technology and construction device for a ventilation and air conditioning system

Abstract

This application relates to the field of construction of ventilation and air conditioning systems, and in particular to a construction process and construction device for ventilation and air conditioning systems, which includes the following steps: Construction preparation: preparation of technical materials, preparation of technical personnel in place, preparation of construction tools, and preparation of equipment and materials; Fabrication of assembled parts: material inspection, duct processing, flange processing, assembly of ducts and flanges to form assembled parts, and quality inspection of the assembled parts; Fabrication of supports and hangers; Fabrication of assemblies: pre-assembly of multiple assembled parts and supports and hangers to form an assembly; Foundation inspection: inspection of reserved embedments; Installation of the assembly; Equipment installation: unpacking inspection, positioning and setting out, equipment hoisting, installation of vibration isolators, and installation of fans; System commissioning: equipment trial operation, system trial operation, fan testing and adjustment; Acceptance and completion: system acceptance and handover, technical data collation, record collation, and production of as-built drawings. Pre-assembling multiple assembled parts and supports and hangers to form an assembly, and then installing the assembly as a whole improves construction efficiency and construction accuracy.

Description

Technical Field

[0001] This application relates to the field of construction of ventilation and air - conditioning systems, and in particular to a construction process and construction device for ventilation and air - conditioning systems. Background Art

[0002] In the post - epidemic era, people's attention to indoor air quality has increased significantly. Ventilation and air - conditioning systems have become the core elements of building design. Especially in places such as hospital operating rooms, laboratories, and data centers that rely on precision air - conditioning and directional air - flow control, the stability requirements for ventilation and air - conditioning systems are extremely high. The construction quality of ventilation and air - conditioning systems directly determines whether the system can achieve the design intent. Only through standardized construction, refined management, and technological innovation can we ensure the efficient, reliable, and sustainable operation of the system, and ultimately achieve the harmonious co - existence of people, buildings, and the environment.

[0003] Conventional construction and installation procedures for ventilation ducts usually involve multi - station, multi - step, and multi - professional cross - operation along the flow direction of supply, exhaust, and return air. It is necessary to repeatedly and continuously move scaffolds and other construction tools, which occupy a large area, are difficult to coordinate on - site installation, have low construction efficiency, and poor construction accuracy. Summary of the Invention

[0004] In order to improve construction efficiency, this application provides a construction process and construction device for ventilation and air - conditioning systems.

[0005] In the first aspect, this application provides a construction process for ventilation and air - conditioning systems, adopting the following technical solutions:

[0006] A construction process for ventilation and air - conditioning systems includes the following steps:

[0007] Construction preparation: preparation of technical data, preparation of technical personnel, preparation of construction machinery and tools, and preparation of equipment and materials;

[0008] Fabrication of assembled parts: material inspection, duct processing, flange processing, assembly of ducts and flanges to form assembled parts, and quality inspection of assembled parts;

[0009] Fabrication of supports and hangers: assembly of brackets and suspenders to form supports and hangers, and quality inspection of supports and hangers;

[0010] Fabrication of assemblies: pre - assemble multiple assembled parts and supports and hangers to form an assembly;

[0011] Foundation inspection: inspection of reserved embedment;

[0012] Installation of assemblies: hoist with construction machinery and tools, and move the assembly to the correct position to complete the installation;

[0013] Equipment installation: unpacking inspection, positioning and setting out, equipment hoisting, installation of vibration isolators, and installation of fans;

[0014] System debugging: equipment trial operation, system trial operation, fan testing and adjustment;

[0015] Completion acceptance: system acceptance and handover, technical data sorting, record sorting, as-built drawing production.

[0016] By adopting the above technical solution, multiple assembled parts and supports are pre-assembled to form an assembly, and then the assembly is installed as a whole, improving the construction efficiency and construction accuracy.

[0017] In a second aspect, the present application provides a construction device for a ventilation and air-conditioning system, adopting the following technical solution:

[0018] A construction device for a ventilation and air-conditioning system includes an assembly platform, a column, a lifting assembly, a counterweight, and a moving assembly. The column is rotatably connected to the upper end of the assembly platform around its own axis, the rotation axis of the column is vertical, the upper end of the column is fixedly connected with a top plate, the lifting assembly is fixedly connected to one end of the top plate, the counterweight is slidably connected to the top plate, the moving assembly is fixedly connected to the assembly platform, the lifting assembly is used to transport the assembly to the moving assembly, and the moving assembly is used to move the assembly to the correct installation position.

[0019] By adopting the above technical solution, the lifting assembly hoists and transports the assembly to the moving assembly. The counterweight is used to balance the force exerted on the top plate by the lifting assembly, reducing the risk of the construction equipment tipping over and improving the stability of the construction equipment. The moving assembly moves the assembly to the installation position, facilitating the operator to assemble the assembly with the ceiling and other assemblies, and improving the construction efficiency.

[0020] Preferably, a sliding groove is provided at the upper end of the top plate. The length direction of the sliding groove is parallel to the length direction of the top plate, and the sliding groove passes through the axis of the column. The counterweight is slidably embedded in the sliding groove.

[0021] By adopting the above technical solution, the sliding groove guides the sliding of the counterweight. When the lifting assembly is arranged on the outer periphery of the assembly platform, the counterweight and the lifting assembly are respectively close to both ends of the top plate. The counterweight balances the column, reducing the risk of the assembly platform tipping over and improving the stability of the construction equipment.

[0022] Preferably, it further includes a contact plate, a connecting rope, a contact post, a sleeve, a connecting plate and a limiting block. The contact plate abuts against the bottom of the sliding groove. The counterweight block is slidably connected to the upper end of the contact plate. One end of the connecting rope is fixedly connected to the end of the contact plate away from the lifting assembly, and the other end of the connecting rope is fixedly connected to the counterweight block. An avoidance opening is provided at the lower end of the top plate, and the avoidance opening communicates with the sliding groove. There are two avoidance openings, and the two avoidance openings are respectively close to both ends of the sliding groove. The contact post is fixedly connected to the lower end of the contact plate, and the contact post extends out of the avoidance opening. The sleeve is sleeved on the outer periphery of the column, and the sleeve is fixedly connected to the upper end of the assembly platform. The connecting plate is fixedly connected to the outer wall of the sleeve. The limiting block is close to the edge of the assembly platform, and the limiting block is fixedly connected to the upper end of the connecting plate. The lower end of the contact post is used to abut against the limiting block.

[0023] By adopting the above technical solution, after the lifting assembly hoists the fitting, the column rotates. When one contact post abuts against the limiting block, one end of the contact plate is lifted, and the counterweight block slides along the height difference and approaches the axis of the column, reducing the risk of the assembly platform tipping over. After the lifting assembly places the fitting on the moving assembly, the column continues to rotate. When the other contact post abuts against the limiting block, one end of the contact plate is lifted, and the counterweight block resets. When the lifting assembly moves to the outer periphery of the assembly platform, the risk of tipping over is reduced and the stability is improved.

[0024] Preferably, the lifting assembly includes an electric hoist, a bearing plate, a pulling rope and a hook. The housing of the electric hoist is fixedly connected to the top plate. The bearing plate is used to support the assembly. One end of the pulling rope is fixedly connected to the bearing plate, and the other end of the pulling rope is fixedly connected to the hook. The hook is used to be hung on the hook of the electric hoist.

[0025] By adopting the above technical solution, the bearing plate is detachably connected to the electric hoist through the pulling rope and the hook, which is convenient for fixing. The electric hoist lifts the bearing plate, which is convenient for transporting the bearing plate to the moving assembly and improves the construction efficiency.

[0026] Preferably, the moving assembly includes an installation table, a lifting table, a first sliding table and a second sliding table. The installation table is fixedly connected to the upper end of the assembly platform. The lifting table is slidably connected to the installation table, and the sliding direction of the lifting table is vertical. The first sliding table is slidably connected to the lifting table, and the second sliding table is slidably connected to the first sliding table. The sliding directions of the first sliding table and the second sliding table are both horizontal, and the sliding directions of the first sliding table and the second sliding table are perpendicular to each other.

[0027] By adopting the above technical solution, by controlling the sliding of the lifting table, the first sliding table and the second sliding table, the fitting is moved to the correct position, improving the construction efficiency.

[0028] Preferably, it further includes a spring, a sliding block and a universal wheel. The lower end of the assembly platform is fixedly connected with a support leg. An avoidance groove is provided at the lower end of the support leg, and a placement groove is provided at the bottom of the avoidance groove. One end of the spring is fixedly connected to the bottom of the placement groove, and the other end of the spring is fixedly connected to the sliding block. The sliding block is slidably connected to the inner wall of the placement groove, and the universal wheel is fixedly connected to the lower end of the sliding block.

[0029] By adopting the above technical solution, the universal wheel rotates, which is convenient for controlling the movement of the overall device and improving the construction efficiency. When the lifting assembly hoists a heavy object, the overall weight of the device increases, the spring contracts, the sliding block slides upward, and the assembly platform abuts against the ground, reducing the probability of the device moving and improving the stability of the device, which is convenient for assembly.

[0030] Preferably, it further includes a rubber ring, a gear, a first rack and a second rack. A connection groove is provided at the lower end of the support leg. The connection groove is arranged on the outer periphery of the avoidance groove. The rubber ring is slidably connected to the inner wall of the connection groove. The lower end of the rubber ring is used to abut against the ground. The support leg is provided with a receiving cavity. The receiving cavity is arranged on the inner periphery of the connection groove and the outer periphery of the placement groove. The receiving cavity communicates with the connection groove and the placement groove. The gear is rotatably connected to the inner wall of the receiving cavity around its own axis. The rotation axis of the gear is horizontal. The first rack is fixedly connected to the sliding block, and the second rack is fixedly connected to the rubber ring. The first rack and the second rack are respectively engaged with both ends of the gear.

[0031] By adopting the above technical solution, when hoisting the assembly, the overall weight of the device increases. The spring compresses, causing the sliding block to slide, and the rubber ring moves downward to tightly abut against the ground, making the device stable and not prone to tipping over.

[0032] Preferably, it further includes a first hydraulic cylinder and a support block. The cylinder body of the first hydraulic cylinder is fixedly connected to the assembly platform, and the piston rod of the first hydraulic cylinder is fixedly connected to the support block. The sliding direction of the support block is vertical, and the lower end of the support block is used to abut against the ground.

[0033] By adopting the above technical solution, when the assembly platform moves to the correct position, the first hydraulic cylinder pushes the support block to move and abut against the ground, increasing the friction with the ground, reducing the probability of the assembly platform moving, improving the stability of the device, and facilitating construction.

[0034] Pre-assemble multiple assembled parts with the support hanger to form an assembly, and then install the assembly as a whole to improve the construction efficiency and construction accuracy;

[0035] After the lifting component hoists the assembly part, the column rotates, and when one abutment column abuts the limit block, one end of the abutment plate is lifted, and the counterweight block slides along the height difference close to the axis of the column to reduce the rollover of the assembly platform. After the lifting component places the assembly part on the moving component, the column continues to rotate, and when the other abutment column abuts the limit block, one end of the abutment plate is lifted, and the counterweight block is reset. When the lifting component moves to the periphery of the assembly platform, the rollover risk is reduced and the stability is improved.

[0036] The rotation of the universal wheel makes it easier to control the movement of the entire device and improve construction efficiency. When the lifting assembly lifts heavy objects, the overall weight of the device increases, the spring contracts, the sliding block slides upward, and the assembly platform contacts the ground, reducing the probability of device movement, improving device stability, and facilitating assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a ventilation and air-conditioning system construction device.

[0038] Figure 2 It is a schematic diagram of the internal structure of a ventilation and air-conditioning system construction device after being cut open.

[0039] Figure 3 It is a partial cross-sectional view of the support leg and displacement assembly.

[0040] Figure 4 It is a schematic diagram of the internal structure of the mobile component after it is cut open.

[0041] Description of reference numerals: 1. assembly platform; 11. support leg; 111. avoidance groove; 112. placement groove; 113. connection groove; 114. accommodating chamber; 115. rotation groove; 116. rotation opening; 2. displacement assembly; 21. spring; 22. sliding block; 23. universal wheel; 24. rubber ring; 25. gear; 26. first rack; 27. second rack; 28. first hydraulic cylinder; 29. support block; 3. guardrail; 31. entrance and exit; 4. ladder; 5. moving assembly; 51. mounting table; 511 , mounting groove; 52, second hydraulic cylinder; 53, lifting platform; 54, first slide rail; 55, first slide; 56, second slide rail; 57, second slide; 6, column; 61, top plate; 611, sliding groove; 612, avoidance; 7, drive motor; 8, lifting assembly; 81, electric hoist; 82, load-bearing plate; 83, pull rope; 84, hook; 9, balance assembly; 91, counterweight; 92, abutment plate; 93, connecting rope; 94, abutment column; 95, sleeve; 96, connecting plate; 97, limit block. DETAILED DESCRIPTION

[0042] The following is combined with Figures 1-4 This application is described in further detail.

[0043] This embodiment of the present application discloses a construction technology for a ventilation and air-conditioning system. Refer to Figure 1 , a construction technology for a ventilation and air-conditioning system includes the following steps:

[0044] Construction preparation: preparation of technical materials, preparation of technical personnel in place, preparation of construction tools, and preparation of equipment and materials;

[0045] Fabrication of assembled parts: material inspection, air duct processing, flange processing, assembly of air duct and flange to form assembled parts, and quality inspection of assembled parts; air duct processing includes material receiving, unfolding and blanking, shearing, chamfering, seam making, air duct folding and forming; flange processing includes material receiving, method flange blanking, welding and punching; the assembly of air duct and flange includes sleeving the flange on the air duct, leaving about 10 mm flanging allowance at the pipe end, the pipe folding line should be perpendicular to the flange plane, and then using a hydraulic rivet gun or a manual eyelet pliers to rivet the air duct and flange with rivets, and leaving flanging around;

[0046] Fabrication of supports and hangers: assembly of supports and hangers to form supports and hangers, and quality inspection of supports and hangers;

[0047] Fabrication of assembled bodies: pre-assembling multiple assembled parts and supports and hangers to form an assembled body; when multiple assembled parts are fixed to each other, wipe off foreign matters and accumulated water on the flange surface, place gasket material between the flanges, and the width of the gasket material after uniform pressing of the flanges should be flush with the inner wall of the air duct;

[0048] Foundation inspection: inspection of reserved embedments;

[0049] Installation of assembled body: lifting with construction tools, moving the assembled body to the correct position to complete the installation;

[0050] Equipment installation: unpacking inspection, positioning and setting out, equipment hoisting, installation of vibration isolators and installation of fans;

[0051] System commissioning: equipment trial operation, system trial operation, fan testing and adjustment;

[0052] Acceptance and completion: system acceptance and handover, sorting of technical materials, record sorting, and production of as-built drawings.

[0053] The implementation principle of a construction technology for a ventilation and air-conditioning system in this embodiment of the present application is: pre-assembling multiple assembled parts and supports and hangers to form an assembled body, and then installing the assembled body as a whole to improve construction efficiency and construction accuracy.

[0054] This embodiment of the present application also discloses a construction device for a ventilation and air-conditioning system. Refer to Figure 1 and Figure 2 , a construction device for a ventilation and air-conditioning system includes an assembly platform 1, a displacement assembly 2, a guardrail 3, a ladder 4, a moving assembly 5, a column 6, a driving motor 7, a lifting assembly 8 and a balancing assembly 9.

[0055] Refer toFigure 2 and Figure 3 The displacement assembly 2 includes a spring 21, a sliding block 22, a universal wheel 23, a rubber ring 24, a gear 25, a first rack 26, a second rack 27, a first hydraulic cylinder 28 and a support block 29.

[0056] The lower end of the assembly platform 1 is fixedly connected with support legs 11. There are four support legs 11, and the four support legs 11 are respectively close to the four corners of the assembly platform 1. The lower end of the support leg 11 is provided with an avoidance groove 111, and the bottom of the avoidance groove 111 is provided with a placement groove 112. One end of the spring 21 is fixedly connected to the bottom of the placement groove 112, and the other end of the spring 21 is fixedly connected to the sliding block 22. The sliding block 22 is slidably connected to the inner wall of the placement groove 112, and the sliding direction of the sliding block 22 is vertical. The universal wheel 23 is fixedly connected to the lower end of the sliding block 22.

[0057] Refer to Figure 3 The lower end of the support leg 11 is provided with a connection groove 113. The connection groove 113 is arranged on the outer periphery of the avoidance groove 111. The rubber ring 24 is slidably connected to the inner wall of the connection groove 113, and the lower end of the rubber ring 24 is used to abut against the ground. The support leg 11 is provided with an accommodation cavity 114. The accommodation cavity 114 is arranged on the inner periphery of the connection groove 113 and the outer periphery of the placement groove 112. The accommodation cavity 114 communicates with the connection groove 113 and the placement groove 112. The gear 25 is rotatably connected to the inner wall of the accommodation cavity 114 around its own axis, and the rotation axis of the gear 25 is horizontal. The first rack 26 is fixedly connected to the sliding block 22, and the second rack 27 is fixedly connected to the rubber ring 24. The first rack 26 and the second rack 27 are respectively engaged with both ends of the gear 25.

[0058] Refer to Figure 2 There are two first hydraulic cylinders 28. The two first hydraulic cylinders 28 are respectively arranged at both ends of the assembly platform 1. The cylinder body of the first hydraulic cylinder 28 is fixedly connected to the support leg 11, and the piston rod of the first hydraulic rod is fixedly connected to the support block 29. The sliding direction of the support block 29 is vertical, and the lower end of the support block 29 is used to abut against the ground.

[0059] The guardrail 3 is fixedly connected to the upper end of the assembly platform 1. The guardrail 3 is arranged along the edge of the assembly platform 1. The guardrail 3 is provided with an inlet and outlet 31. The ladder 4 is directly opposite to the inlet and outlet 31. The ladder 4 is fixedly connected to the assembly platform 1 and is used for users to climb.

[0060] Refer to Figure 4 The moving assembly 5 includes a mounting table 51, a second hydraulic cylinder 52, a lifting table 53, a first slide rail 54, a first slide block 55, a second slide rail 56 and a second slide block 57.

[0061] Refer to Figure 1 and Figure 4, the mounting table 51 is fixedly connected to the upper end of the assembly platform 1. An installation groove 511 is provided at the upper end of the mounting table 51. The cylinder block of the second hydraulic cylinder 52 is fixedly connected to the bottom of the installation groove 511, and the piston rod of the second hydraulic cylinder 52 is fixedly connected to the lifting platform 53. The lifting platform 53 is slidably connected to the groove wall of the installation groove 511. The sliding direction of the lifting platform 53 is vertical, and the length direction of the lifting platform 53 is parallel to the length direction of the assembly platform 1. The first slide rail 54 is fixedly connected to the upper end of the lifting platform 53. There are two first slide rails 54, and the two first slide rails 54 are respectively close to both ends of the lifting platform 53 in the length direction. The length direction of the first slide rail 54 is parallel to the width direction of the lifting platform 53. The first slide table 55 is slidably connected to the first slide rail 54. The second slide rail 56 is fixedly connected to the upper end of the first slide table 55. There are two second slide rails 56, and the two second slide rails 56 are respectively close to both ends of the lifting platform 53 in the width direction. The length direction of the second slide rail 56 is parallel to the length direction of the lifting platform 53. The second slide table 57 is slidably connected to the second slide rail 56. The heights of the first slide table 55 and the second slide table 57 are greater than the height of the guardrail 3.

[0062] Refer to Figure 2 , the column 6 is arranged inside the guardrail 3. The column 6 is arranged on the side of the moving assembly 5 away from the ladder 4. A rotating groove 115 is provided at the upper end of the assembly platform 1. The column 6 is coaxially and rotatably embedded in the rotating groove 115. A rotating opening 116 is coaxially provided at the bottom of the rotating groove 115, and the rotating opening 116 penetrates the assembly platform 1. The motor housing of the driving motor 7 is fixedly connected to the lower end of the assembly platform 1, and the motor shaft of the driving motor 7 is coaxially fixedly connected to the column 6. A top plate 61 is fixedly connected to the upper end of the column 6. The lifting assembly 8 is fixedly connected to one end of the top plate 61.

[0063] The lifting assembly 8 includes an electric hoist 81, a bearing plate 82, a pulling rope 83 and a hook 84. The housing of the electric hoist 81 is fixedly connected to the lower end of the top plate 61. The bearing plate 82 is used to support the assembly. One end of the pulling rope 83 is fixedly connected to the bearing plate 82, and the other end of the pulling rope 83 is fixedly connected to the hook 84. The hook 84 is used to hang on the hook of the electric hoist 81. There are four pulling ropes 83, and the four pulling ropes 83 are respectively fixedly connected to the four corners of the bearing plate 82. After the electric hoist 81 lifts the bearing plate 82, the bearing plate 82 is transported to the upper end of the second slide table 57.

[0064] Refer to Figure 2, the balance component 9 includes a counterweight 91, an abutting plate 92, a connecting rope 93, an abutting column 94, a sleeve 95, a connecting plate 96 and a limiting block 97. The upper end of the top plate 61 is provided with a sliding groove 611, the length direction of the sliding groove 611 is parallel to the length direction of the top plate 61, the sliding groove 611 passes through the axis of the column 6, and the distances from both ends of the sliding groove 611 to the axis of the column 6 are equal. The counterweight 91 is slidably embedded in the sliding groove 611, and the distance from the sliding groove 611 to the axis of the column 6 is less than the distance from the electric hoist 81 to the axis of the column 6. The abutting plate 92 abuts against the bottom of the sliding groove 611, and the counterweight 91 is slidably connected to the upper end of the abutting plate 92. One end of the connecting rope 93 is fixedly connected to the end of the abutting plate 92 away from the lifting assembly 8, the other end of the connecting rope 93 is fixedly connected to the counterweight 91, and the length of the connecting rope 93 is less than the distance from the end of the abutting plate 92 to the axis of the column 6.

[0065] The lower end of the top plate 61 is provided with an avoidance opening 612, the avoidance opening 612 communicates with the sliding groove 611, there are two avoidance openings 612, and the two avoidance openings 612 are respectively close to both ends of the sliding groove 611. The abutting column 94 is fixedly connected to the lower end of the abutting plate 92, the abutting column 94 extends out of the avoidance opening 612, and the lower end of the abutting column 94 is spherical. The sleeve 95 is sleeved on the outer periphery of the column 6, the sleeve 95 is fixedly connected to the upper end of the assembly platform 1, the connecting plate 96 is fixedly connected to the outer wall of the sleeve 95, the limiting block 97 is close to the edge of the assembly platform 1, the limiting block 97 is fixedly connected to the upper end of the connecting plate 96, and the lower end of the abutting column 94 is used to abut against the limiting block 97.

[0066] The implementation principle of the construction device of the ventilation and air-conditioning system in the embodiment of the present application is as follows: Push the assembly platform 1 to move to the construction site. The universal wheels 23 make it convenient for the assembly platform 1 to move. After moving to the correct position, the first hydraulic cylinder 28 pushes the support block 29 to abut against the ground. If the operation of the first hydraulic cylinder 28 is forgotten, the operator climbs to the assembly platform 1 through the ladder 4. The weight of the assembly platform 1 increases, causing the spring 21 to compress, and the rubber ring 24 abuts against the ground so that the assembly platform 1 is not prone to displacement. After the lifting assembly 8 hoists the fitting, the column 6 rotates. When one abutting column 94 abuts against the limiting block 97, one end of the abutting plate 92 is lifted, and the counterweight 91 slides along the height difference and approaches the axis of the column 6. After the lifting assembly 8 places the fitting on the moving assembly 5, the column 6 continues to rotate. When the other abutting column 94 abuts against the limiting block 97, one end of the abutting plate 92 is lifted, and the counterweight 91 resets. When the lifting assembly 8 moves to the outer periphery of the assembly platform 1, the risk of tipping is reduced and the stability is improved.

[0067] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A construction device for a ventilation and air conditioning system, characterized in that: It includes an assembly platform (1), a column (6), a lifting assembly (8), a counterweight (91) and a moving assembly (5). The column (6) is rotatably connected to the upper end of the assembly platform (1) about its own axis. The rotation axis of the column (6) is vertical. The upper end of the column (6) is fixedly connected with a top plate (61). The lifting assembly (8) is fixedly connected to one end of the top plate (61). The counterweight (91) is slidably connected to the top plate (61). The moving assembly (5) is fixedly connected to the assembly platform (1). The lifting assembly (8) is used to transport the assembly to the moving assembly (5), and the moving assembly (5) is used to move the assembly to the correct installation position. A sliding groove (611) is provided at the upper end of the top plate (61). The length direction of the sliding groove (611) is parallel to the length direction of the top plate (61). The sliding groove (611) passes through the axis of the column (6). The counterweight (91) is slidably embedded in the sliding groove (611). It further includes a contact plate (92), a connecting rope (93), a contact column (94), a sleeve (95), a connecting plate (96) and a limiting block (97). The contact plate (92) abuts against the bottom of the sliding groove (611). The counterweight (91) is slidably connected to the upper end of the contact plate (92). One end of the connecting rope (93) is fixedly connected to the end of the contact plate (92) away from the lifting assembly (8), and the other end of the connecting rope (93) is fixedly connected to the counterweight (91). An avoidance opening (612) is provided at the lower end of the top plate (61). The avoidance opening (612) communicates with the sliding groove (611). There are two avoidance openings (612), and the two avoidance openings (612) are respectively close to both ends of the sliding groove (611). The contact column (94) is fixedly connected to the lower end of the contact plate (92). The contact column (94) extends out of the avoidance opening (612). The sleeve (95) is sleeved on the outer periphery of the column (6). The sleeve (95) is fixedly connected to the upper end of the assembly platform (1). The connecting plate (96) is fixedly connected to the outer wall of the sleeve (95). The limiting block (97) is close to the edge of the assembly platform (1). The limiting block (97) is fixedly connected to the upper end of the connecting plate (96). The lower end of the contact column (94) is used to abut against the limiting block (97).

2. The construction device for a ventilation and air conditioning system according to claim 1, wherein: The lifting assembly (8) includes an electric hoist (81), a bearing plate (82), a pulling rope (83) and a hook (84). The housing of the electric hoist (81) is fixedly connected to the top plate (61). The bearing plate (82) is used to support the assembly. One end of the pulling rope (83) is fixedly connected to the bearing plate (82), and the other end of the pulling rope (83) is fixedly connected to the hook (84). The hook (84) is used to be hung on the hook of the electric hoist (81).

3. The construction device for a ventilation and air conditioning system according to claim 1, characterized in that: The moving component (5) includes an installation table (51), a lifting table (53), a first sliding table (55) and a second sliding table (57). The installation table (51) is fixedly connected to the upper end of the assembly platform (1). The lifting table (53) is slidably connected to the installation table (51), and the sliding direction of the lifting table (53) is vertical. The first sliding table (55) is slidably connected to the lifting table (53), and the second sliding table (57) is slidably connected to the first sliding table (55). The sliding directions of the first sliding table (55) and the second sliding table (57) are both horizontal, and the sliding directions of the first sliding table (55) and the second sliding table (57) are perpendicular to each other.

4. The construction device for a ventilation and air conditioning system according to claim 1, characterized in that: It further includes a spring (21), a sliding block (22) and a universal wheel (23). The lower end of the assembly platform (1) is fixedly connected with a support leg (11). An avoidance groove (111) is provided at the lower end of the support leg (11). A placement groove (112) is provided at the bottom of the avoidance groove (111). One end of the spring (21) is fixedly connected to the bottom of the placement groove (112), and the other end of the spring (21) is fixedly connected to the sliding block (22). The sliding block (22) is slidably connected to the inner wall of the placement groove (112). The universal wheel (23) is fixedly connected to the lower end of the sliding block (22).

5. The construction device for a ventilation and air conditioning system according to claim 4, wherein: It further includes a rubber ring (24), a gear (25), a first rack (26) and a second rack (27). A connection groove (113) is provided at the lower end of the support leg (11). The connection groove (113) is arranged on the outer periphery of the avoidance groove (111). The rubber ring (24) is slidably connected to the inner wall of the connection groove (113). The lower end of the rubber ring (24) is used to abut against the ground. The support leg (11) is provided with a receiving cavity (114). The receiving cavity (114) is arranged on the inner periphery of the connection groove (113) and the outer periphery of the placement groove (112). The receiving cavity (114) communicates with the connection groove (113) and the placement groove (112). The gear (25) is rotatably connected to the inner wall of the receiving cavity (114) around its own axis. The rotation axis of the gear (25) is horizontal. The first rack (26) is fixedly connected to the sliding block (22), and the second rack (27) is fixedly connected to the rubber ring (24). The first rack (26) and the second rack (27) are respectively engaged with both ends of the gear (25).

6. The construction device for a ventilation and air conditioning system according to claim 4, wherein: It further includes a first hydraulic cylinder (28) and a support block (29). The cylinder body of the first hydraulic cylinder (28) is fixedly connected to the assembly platform (1), and the piston rod of the first hydraulic cylinder (28) is fixedly connected to the support block (29). The sliding direction of the support block (29) is vertical, and the lower end of the support block (29) is used to abut against the ground.

7. A construction technology of a ventilation and air conditioning system, which is applied to a construction device of a ventilation and air conditioning system described in any one of claims 1-6, and is characterized in that: It includes the following steps: Construction preparation: Preparation of technical materials, preparation of technical personnel in place, preparation of construction tools, preparation of equipment and materials; Fabrication of assembled parts: Material inspection, air duct processing, flange processing, assembly of air duct and flange to form assembled parts, and quality inspection of assembled parts; Fabrication of supports and hangers: Assembly of supports and suspenders to form supports and hangers, and quality inspection of supports and hangers; Assembly production: Pre-assemble multiple assembled parts and support hangers to form an assembly; Foundation inspection: Inspection of reserved embedded parts; Assembly installation: Use construction machinery and tools to lift and move the assembly to the correct position for installation; Equipment installation: Unboxing inspection, positioning and setting out, equipment hoisting, installation of vibration isolators and installation of fans; System commissioning: Equipment trial operation, system trial operation, fan testing and adjustment; Acceptance and completion: System acceptance and handover, technical data collation, record collation, production of as-built drawings.

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