Central air conditioner for steel structure plant and installation method thereof

Abstract

The present invention discloses a central air conditioner for a steel structure factory, comprising a plurality of first support units, wherein the first support units comprise two U-shaped positioning members, both ends of each U-shaped positioning member are provided with positioning plates, and each positioning plate is connected by an adjusting member; a limiting block is provided on the upper outer wall of each adjusting sleeve, and the inner side of each limiting block is flush with the inner side of the adjusting sleeve, and a connecting block is provided on the lower outer wall of each adjusting sleeve, and each connecting block is connected by a cross bar, and an adjusting handle is provided at one end of the adjusting screw, and the other end of the adjusting screw is rotatably connected with the positioning seat, and the upper end of the positioning seat is connected with the lower end of the support plate. The present invention sets a plurality of first support units, and hangs the first support units on the cross frame by the U-shaped positioning on the first support units, so that when the steel structure factory is used, the central air conditioner unit can be installed in the correct position while avoiding welding and punching, so that the central air conditioner unit can play the best performance.

Description

Technical Field

[0001] The invention relates to the field of installation of central air conditioners in large spaces of steel structure workshops, and in particular to a central air conditioner in a steel structure workshop and an installation method thereof. Background Art

[0002] The air conditioning unit with remote jet function and long-distance air supply jet is currently the leading central air conditioning terminal equipment (water cooling / heating system), mainly used in large spaces and open areas. The central air conditioner can not only be installed in large-span and high-height steel structure production line workshops, but also can be used in aircraft hangar construction, private aircraft parking hangars, aircraft maintenance hangars, steel structure aircraft hangars, etc., because when the temperature is very low, the aircraft body is also prone to frostbite, and it is necessary to install this central air conditioner with remote jet function and long-distance air supply jet in the hangar.

[0003] According to the steel structure factory specifications, welding, drilling and other operations are prohibited after the steel structure factory installation acceptance is completed. Therefore, if the terminal equipment of the central air-conditioning unit cannot be installed in the correct position, it will not be able to perform as expected, and it will also cause energy waste and affect the normal production of the assembly line. Therefore, how to install the system pipeline in accordance with the specifications is one of the very important links.

[0004] Therefore, how to install the central air-conditioning terminal equipment without damaging the main steel structure, how to solve the problem of system pipelines without ground support and large span laying, and at the same time comply with steel structure engineering specifications, central air-conditioning terminal equipment installation engineering specifications, system pipeline installation engineering specifications and system energy saving, has become a bottleneck and a major obstacle to the installation of this type of central air-conditioning system.

[0005] Therefore, those skilled in the art are committed to providing a central air conditioner for a steel structure plant and an installation method thereof that can effectively solve the above-mentioned technical problems. Summary of the invention

[0006] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a central air conditioner for a steel structure plant and an installation method thereof which can effectively solve the above-mentioned technical problems.

[0007] To achieve the above object, the present invention provides a central air conditioner for a steel structure plant, comprising a plurality of first support units, wherein the first support units include two U-shaped positioning members, both ends of each of the U-shaped positioning members are provided with positioning plates, and each of the positioning plates is connected by an adjusting member;

[0008] Support rods are arranged on both sides of each positioning plate, and a support plate is arranged below each positioning plate. Both ends of each support plate are connected to each positioning plate through each support rod.

[0009] Each of the support plates is provided with a limit adjustment unit, and the limit adjustment unit includes two guide rods parallel to each other, one end of each of the guide rods is connected to the outer side of the support plate, and the other end of each of the guide rods is provided with a limit plate, and each of the guide rods is sleeved with an adjustment sleeve, and each of the adjustment sleeves can slide along the length direction of each of the guide rods;

[0010] The upper outer wall of each adjusting sleeve is provided with a limit block, the inner side of each limit block is flush with the inner side of the adjusting sleeve, the lower outer wall of each adjusting sleeve is provided with a connecting block, and each connecting block is connected by a cross bar, an adjusting seat is provided on the cross bar, an adjusting screw is threadedly connected to the adjusting seat, an adjusting handle is provided at one end of the adjusting screw, the other end of the adjusting screw is rotatably connected to the positioning seat, and the upper end of the positioning seat is connected to the lower end of the support plate.

[0011] Preferably, the cross-section of the positioning plate is U-shaped, and the lower halves of both ends of each U-shaped positioning piece pass through each positioning plate respectively. The lower halves of both ends of each U-shaped positioning piece are provided with limiting nuts, and each limiting nut is located below each positioning plate and used in conjunction with the lower end surface of each positioning plate.

[0012] Preferably, the adjusting member comprises two adjusting rods arranged parallel to each other, the U-shaped positioning member is located between the two adjusting rods, both ends of each adjusting rod can movably pass through each positioning plate, both ends of each adjusting rod are provided with threaded sections, and each threaded section is sleeved with an adjusting nut.

[0013] Preferably, both ends of each support rod are sleeved with a limiting nut, and each support rod is detachably connected to each positioning plate and each support plate through each limiting nut.

[0014] Preferably, one end of each guide rod is connected to the outer side of the support plate, the other end of each guide rod is provided with a threaded hole, one end of the limiting plate is provided with a screw, and the limiting plate is detachably connected to the guide rod through threaded cooperation between the screw and the threaded hole.

[0015] Preferably, a low-tightening nut is sleeved on the adjusting screw.

[0016] Preferably, it further includes a second supporting unit, which includes a supporting seat, two pull ropes are provided at both ends of the supporting seat, and the other end of each pull rope is provided with a connecting piece, and the connecting piece includes a U-shaped rod, both ends of the U-shaped rod are detachably connected to the base plate at the same time, and each pull rope is respectively connected to the U-shaped rod on each connecting piece.

[0017] Preferably, two mutually parallel first pull rods are included, the upper end of each of the first pull rods is connected to each of the bottom plates respectively, and the lower end of each of the first pull rods is connected via a second pull rod.

[0018] A method for installing a central air conditioner in a steel structure plant comprises the following steps:

[0019] S1: First, install each first support unit. The specific installation method is to install the U-shaped positioning piece on each first support unit on the horizontal frame, and confirm that the inner side of the U-shaped positioning piece fits with the outer wall of the horizontal frame. If not, it is necessary to replace the U-shaped positioning piece that is suitable for the size of the horizontal frame. If so, proceed to the next step;

[0020] S2: Connect the two ends of each support rod to the support plate and the positioning plate respectively, then pass the threaded sections at the two ends of each adjustment rod through each positioning plate, and then connect each positioning plate to the two ends of the U-shaped positioning member; in this embodiment, after installing the adjustment rod, on the one hand, the air-conditioning unit can maintain its structural stability after being installed on the first support unit; on the other hand, when installing the air-conditioning unit, the distance between two adjacent positioning plates can be adjusted according to the actual size of the air-conditioning unit, thereby maintaining structural stability while improving practicality;

[0021] S3: placing the air-conditioning unit on two support plates. In this embodiment, the distance between the positioning plate and the support plate is greater than the height of the air-conditioning unit to be installed, so that it is more convenient to install and disassemble. Turn the adjustment handle to drive the cross bar to move through the threaded cooperation between the handle and the cross bar until the inner side of the limit block is in contact with the outer wall of the air-conditioning unit, so that the air-conditioning unit is limited by each limit block. The setting of the movable limit block and the adjustment rod are suitable for air-conditioning units of different sizes, which improves the versatility of the first support unit. After placing each air-conditioning unit on each first support unit, check whether each air-conditioning unit overlaps with the limit blocks on each first support unit. After confirming that the overlap is correct, proceed to the next step.

[0022] S4: Install the connector. First, install the U-shaped rod on the cross frame to confirm whether the outer wall of the U-shaped rod overlaps with the cross frame. If so, proceed to the next step. Before making the U-shaped positioning piece and the U-shaped rod, the size of the cross frame will be confirmed first. The U-shaped positioning piece and the U-shaped rod are made by referring to the size of the cross frame, so that the U-shaped positioning piece and the U-shaped rod are adapted to the cross frame to maintain the stability of the structure.

[0023] S5: detachably connecting the two ends of the bottom plate to the two ends of the U-shaped rod, respectively setting one end of a plurality of pull ropes on both sides of the support seat, and respectively connecting the other ends of the plurality of pull ropes to the upper ends of the U-shaped rods on two adjacent connecting members;

[0024] S6: several first tie rods are respectively arranged at the lower end of the bottom plate, and the lower ends of two adjacent first tie rods are connected by a second tie rod; the first tie rod and the second tie rod can be increased or decreased according to the structure of the actual steel structure workshop;

[0025] S7: Then, the column connection part used in conjunction with the second tie rod and the connecting piece is mounted on the column. After completing the above steps, the stability of the column connection part and the connecting piece is checked and then the pipeline is laid. After the pipeline is laid, it is supported by the column connection part, the support seat and the second tie rod.

[0026] The beneficial effects of the present invention are as follows: the present invention sets a plurality of first support units, and hangs the first support units on the cross frame through the U-shaped positioning on the first support units, which effectively avoids welding and drilling when the steel structure factory is used, and at the same time, by installing the adjusting rod, the air-conditioning unit can maintain its structural stability after being installed on the first support unit, and when installing the air-conditioning unit, the distance between two adjacent positioning plates can be adjusted according to the actual size of the air-conditioning unit, thereby maintaining the structural stability and improving the practicality; in addition, the distance between the positioning plate and the support plate is greater than the height of the air-conditioning unit to be installed, thereby making it easier to install and disassemble, and the air-conditioning unit is limited by each limit block, and the setting of the movable limit block cooperates with the adjusting rod to be suitable for air-conditioning units of different sizes, thereby improving the versatility of the first support unit; the present invention can avoid welding and drilling when used in a steel structure factory, and at the same time install the central air-conditioning unit in the correct position, so that the central air-conditioning unit can play the best performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the first supporting unit in the present invention used in conjunction with the air conditioning unit.

[0029] Figure 3 yes Figure 2 Schematic diagram of the structure without air conditioning unit installed.

[0030] Figure 4 yes Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0031] Figure 5 yes Figure 3 Schematic diagram of the local enlarged structure at point B in the middle.

[0032] Figure 6 It is a structural schematic diagram of the connecting piece in the present invention.

[0033] Figure 7Schematic diagram of the structure of components such as connectors and pull ropes.

[0034] Figure 8 yes Figure 7 Schematic diagram of the structure after adding auxiliary pull rope. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 8 As shown, a central air conditioner for a steel structure factory includes a plurality of first support units 1, each of which includes two U-shaped positioning members 2, both ends of each of the U-shaped positioning members 2 are provided with positioning plates 3, and each of the positioning plates 3 is connected by an adjusting member 5; the U-shaped positioning members 2 are made of round steel bars after heating treatment, and are made into brackets using bending equipment and installed on steel components.

[0039] Support rods 6 are provided on both sides of each positioning plate 3, and support plates 7 are provided below each positioning plate 3. Both ends of each support plate 7 are connected to each positioning plate 3 through each support rod 6.

[0040] Each of the support plates 7 is provided with a limit adjustment unit 8, and the limit adjustment unit 8 includes two mutually parallel guide rods 9, one end of each of the guide rods 9 is connected to the outer side of the support plate 7, and the other end of each of the guide rods 9 is provided with a limit plate 10, and each of the guide rods 9 is sleeved with an adjustment sleeve 11, and each of the adjustment sleeves 11 can slide along the length direction of each of the guide rods 9;

[0041] A limit block 12 is provided on the upper outer wall of each adjustment sleeve 11, and the inner side of each limit block 12 is flush with the inner side of the adjustment sleeve 11. A connecting block 13 is provided on the lower outer wall of each adjustment sleeve 11, and each connecting block 13 is connected by a cross bar 15. An adjustment seat 16 is provided on the cross bar 15, and an adjusting screw 17 is threadedly connected to the adjustment seat 16. An adjustment handle 18 is provided at one end of the adjusting screw 17, and the other end of the adjusting screw 17 is rotatably connected to a positioning seat 19. The upper end of the positioning seat 19 is connected to the lower end of the support plate 7.

[0042] The cross-section of the positioning plate 3 is U-shaped, and the lower halves of both ends of each U-shaped positioning member 2 pass through each positioning plate 3 respectively. The lower halves of both ends of each U-shaped positioning member 2 are sleeved with limiting nuts, and each limiting nut is located below each positioning plate 3 and is used in conjunction with the lower end surface of each positioning plate 3.

[0043] The adjusting member 5 includes two adjusting rods 20 arranged parallel to each other, the U-shaped positioning member 2 is located between the two adjusting rods 20, and both ends of each adjusting rod 20 can movably pass through each positioning plate 3. Both ends of each adjusting rod 20 are provided with threaded sections, and each threaded section is sleeved with an adjusting nut.

[0044] Both ends of each support rod 6 are sleeved with a limiting nut, and each support rod 6 is detachably connected to each positioning plate 3 and each support plate 7 through each limiting nut.

[0045] One end of each guide rod 9 is connected to the outer side of the support plate 7, and the other end of each guide rod 9 is provided with a threaded hole. One end of the limit plate 10 is provided with a screw, and the limit plate 10 is detachably connected to the guide rod 9 through threaded cooperation between the screw and the threaded hole.

[0046] In order to further improve the stability of the structure, a low-tightening nut 21 is sleeved on the adjusting screw 17 .

[0047] In this embodiment, a second support unit 22 is further included, and the second support unit 22 includes a support seat 23. Two pull ropes 26 are provided at both ends of the support seat 23, and the other end of each pull rope 26 is provided with a connecting member 27. The connecting member 27 includes a U-shaped rod 28, and both ends of the U-shaped rod 28 are detachably connected to the bottom plate 29 at the same time. Each of the pull ropes 26 is connected to the U-shaped rod 28 on the connecting member 27 respectively.

[0048] In this embodiment, two mutually parallel first tie rods 30 are further included. The upper end of each of the first tie rods 30 is connected to each of the bottom plates 29 , and the lower end of each of the first tie rods 30 is connected via a second tie rod 31 .

[0049] A method for installing a central air conditioner in a steel structure plant comprises the following steps:

[0050] S1: First, install each first support unit 1. The specific installation method is to install the U-shaped positioning member 2 on each first support unit 1 on the horizontal frame 100, and confirm that the inner side of the U-shaped positioning member 2 fits with the outer wall of the horizontal frame 100. If not, it is necessary to replace the U-shaped positioning member 2 that is compatible with the size of the horizontal frame 100. If so, proceed to the next step;

[0051] S2: Connect the two ends of each support rod 6 to the support plate 7 and the positioning plate 3 respectively, then pass the threaded sections at the two ends of each adjustment rod 20 through each positioning plate 3, and then connect each positioning plate 3 to the two ends of the U-shaped positioning member 2; in this embodiment, after installing the adjustment rod 20, on the one hand, the air-conditioning unit 101 can maintain its structural stability after being installed on the first support unit 1; on the other hand, when installing the air-conditioning unit 101, the distance between two adjacent positioning plates 3 can be adjusted according to the actual size of the air-conditioning unit 101, so as to improve practicality while maintaining structural stability;

[0052] S3: Place the air-conditioning unit 101 on the two support plates 7. In this embodiment, the spacing between the positioning plate 3 and the support plate 7 is greater than the height of the air-conditioning unit 101 to be installed, so that it is more convenient to install and disassemble. Turn the adjusting handle 18, so as to drive the cross bar 15 to move through the threaded cooperation between the handle 18 and the cross bar 15, until the inner side of the limit block 12 is in contact with the outer wall of the air-conditioning unit 101, so that the air-conditioning unit 101 is limited by each limit block 12. The setting of the movable limit block 12 cooperates with the adjusting rod 20 to be suitable for air-conditioning units 101 of different sizes, thereby improving the versatility of the first support unit 1; after placing each air-conditioning unit 101 on each first support unit 1, check whether each air-conditioning unit 101 overlaps with the limit blocks 12 on each first support unit 1, and proceed to the next step only after confirming that the overlap is correct and fastened;

[0053] S4: Install the connecting piece 27. First, install the U-shaped rod 28 on the cross frame 100 to confirm whether the outer wall of the U-shaped rod 28 overlaps with the cross frame 100. If so, proceed to the next step. Before manufacturing the U-shaped positioning piece 2 and the U-shaped rod 28, the size of the cross frame 100 is first confirmed. The U-shaped positioning piece 2 and the U-shaped rod 28 are manufactured by referring to the size of the cross frame 100, so that the manufactured U-shaped positioning piece 2 and the U-shaped rod 28 are adapted to the cross frame 100 to maintain the stability of the structure.

[0054] S5: The two ends of the bottom plate 29 are detachably connected to the two ends of the U-shaped rod 28, one end of a plurality of pull ropes 26 is respectively arranged on both sides of the support seat 23, and the other ends of the plurality of pull ropes 26 are respectively connected to the upper ends of the U-shaped rods 28 on two adjacent connecting members 27;

[0055] S6: A plurality of first tie rods 30 are respectively arranged at the lower end of the bottom plate 29, and the lower ends of two adjacent first tie rods 30 are connected by a second tie rod 31; the first tie rod 30 and the second tie rod 31 can be increased or decreased according to the structure of the actual steel structure workshop;

[0056] S7: Then, the column connection part 105 used in conjunction with the second tie rod 31 and the connecting piece 27 is mounted on the column 106. After completing the above steps, the stability of the column connection part 105 and the connecting piece 27 is checked and then the pipeline 107 is laid. After the pipeline 107 is laid, it is supported by the column connection part 105, the support seat 23 and the second tie rod 31.

[0057] The present invention solves the problem of installing a central air-conditioning terminal system and system pipelines in a large-span and high-height steel structure factory building while complying with relevant installation specifications. It provides a large-span and large-space central air-conditioning system installation scheme and use method without destroying the original structure.

[0058] Steel structure workshops have become the mainstream structure of production line workshops due to their short construction period, large spatial span and high structural strength. The spacing between supporting columns or beams and the horizontal length of purlins are generally less than 10 meters. The "Construction Quality Acceptance Code for Water Supply, Drainage and Heating Engineering" stipulates the spacing between pipe supports and hangers. Pipe supports and hangers fixed on the building structure shall not affect the safety of the structure. The spacing between supports and hangers for horizontally installed steel pipes shall not be greater than the maximum spacing of steel pipe supports (see Table 1).

[0059]

[0060] Table 1

[0061] Since this type of long-distance air supply jet air conditioning unit is mainly characterized by a large water flow rate, the pipe interface is generally designed to be DN32 or above, and the terminal water supply pipe will use DN40. The spacing of the inclined steel cables (pull rope 26) can be determined according to the nominal diameter of the pipe to meet the maximum spacing requirements of the steel pipe support. This type of installation method is suitable for a minimum span of 6 meters and a maximum span of 17 meters in a factory building with an insulation layer. If the nominal diameter of the pipe does not match the maximum spacing of the support, the method of adding steel cables can be used. Specifically, one end of the newly added steel cable (auxiliary pull rope 201) is connected to the connector 27, and the other end is connected to the pipe 107 through the fixing 200. The original pull rope 26 is located between several newly added steel cables (such as Figure 8 As shown). Multiple steel cables can be added according to the actual situation, so this installation method fully meets the pipeline installation method under the current existing steel structure technology.

[0062] The installation method of the present invention is used to solve the problem that the pipeline cannot be laid in a large span. The most reasonable installation method of the long-distance air supply jet air conditioning unit in the steel structure factory is to install it on the middle column and supply air from the middle to both sides, which can reduce the jet air volume and wind pressure and reduce the impact on the production line. If the air is supplied from one side of the house to the other side, although the problem of laying pipelines can be solved, it is necessary to increase the jet air volume and wind pressure, which will have a great impact. If the air is supplied from both sides of the house to the middle, although the impact on the production line can be reduced, it will incur extremely high investment.

[0063] The pipeline system is laid in the same direction. The advantage of adopting this same-direction solution for road laying is that it can solve the problem of water flow imbalance in the pipeline network system.

[0064] The present invention also has the following advantages:

[0065] 1. Installation can be carried out without damaging the steel components;

[0066] 2. The pipeline passes through the connector (cable) and the column connection to solve the problem of large span pipeline laying;

[0067] 3. Pipeline laying adopts pipeline same-course design to solve the problem of water flow imbalance in the pipe network system;

[0068] 4. Long-distance air supply jet air conditioning units are mainly suitable for installation in the middle to supply air to the left and right sides.

[0069] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A central air conditioner for a steel structure plant, characterized by: It comprises a plurality of first support units (1), wherein the first support units comprise two U-shaped positioning members (2), both ends of each of the U-shaped positioning members (2) are provided with positioning plates (3), and each of the positioning plates (3) is connected via an adjusting member (5); Support rods (6) are provided on both sides of each positioning plate (3), and a support plate (7) is provided below each positioning plate (3). Both ends of each support plate (7) are connected to each positioning plate (3) via the support rods (6). Each of the support plates (7) is provided with a limit adjustment unit (8), the limit adjustment unit (8) comprising two mutually parallel guide rods (9), one end of each of the guide rods (9) being connected to the outer side of the support plate (7), the other end of each of the guide rods (9) being provided with a limit plate (10), each of the guide rods (9) being sleeved with an adjustment sleeve (11), each of the adjustment sleeves (11) being able to slide along the length direction of each of the guide rods (9); The upper outer wall of each adjusting sleeve (11) is provided with a limit block (12), the inner side of each limit block (12) is flush with the inner side of the adjusting sleeve (11), the lower outer wall of each adjusting sleeve (11) is provided with a connecting block (13), each connecting block (13) is connected via a cross bar (15), an adjusting seat (16) is provided on the cross bar (15), an adjusting screw (17) is threadedly connected to the adjusting seat (16), one end of the adjusting screw (17) is provided with an adjusting handle (18), and the other end of the adjusting screw (17) is rotatably connected to the positioning seat (19). The upper end of the positioning seat (19) is connected to the lower end of the support plate (7); the cross section of the positioning plate (3) is U-shaped, and the lower halves of both ends of each U-shaped positioning member (2) pass through each positioning plate (3) respectively. The lower halves of both ends of each U-shaped positioning member (2) are sleeved with a limiting nut, and each limiting nut is located below each positioning plate (3) and cooperates with the lower end surface of each positioning plate (3); the adjusting member (5) comprises two adjusting rods (20) arranged parallel to each other, and the U-shaped positioning member (2) is located between the two adjusting rods (20). The two ends of the adjusting rod (20) are respectively and movably passed through the positioning plates (3), and the two ends of each adjusting rod (20) are provided with threaded sections, and the threaded sections are sleeved with adjusting nuts; the two ends of each supporting rod (6) are sleeved with limiting nuts, and each supporting rod (6) is detachably connected to the positioning plates (3) and the supporting plates (7) through the limiting nuts; one end of each guiding rod (9) is connected to the outer side of the supporting plate (7), and the other end of each guiding rod (9) is provided with a threaded hole; one end of the limiting plate (10) is provided with a screw, and the limiting nuts are sleeved with adjusting nuts; The disk (10) is detachably connected to the guide rod (9) by threaded engagement of a screw rod and a threaded hole; and further comprises a second support unit (22), the second support unit (22) comprising a support seat (23), two ends of the support seat (23) are provided with two pull ropes (26), the other end of each of the pull ropes (26) is provided with a connecting piece (27), the connecting piece (27) comprises a U-shaped rod (28), both ends of the U-shaped rod (28) are detachably connected to the bottom plate (29), and each of the pull ropes (26) is respectively connected to the U-shaped rod (28) on each of the connecting pieces (27).

2. The central air conditioner for a steel structure plant as claimed in claim 1, characterized in that: The adjusting screw rod (17) is sleeved with a low-tightening nut (21).

3. The central air conditioner for a steel structure plant as claimed in claim 2, characterized in that: It also comprises two mutually parallel first pull rods (30), the upper end of each of the first pull rods (30) being connected to each of the bottom plates (29) respectively, and the lower end of each of the first pull rods (30) being connected via a second pull rod (31).

4. The method for installing a central air conditioner in a steel structure plant as claimed in claim 3, characterized in that: The following steps are involved: S1: First, each first support unit (1) is installed. Specifically, the U-shaped positioning member (2) on each first support unit (1) is installed on the cross frame (100), and it is confirmed that the inner side of the U-shaped positioning member (2) fits with the outer wall of the cross frame (100). If not, it is necessary to replace the U-shaped positioning member (2) with a size that is compatible with the cross frame (100). If so, the next step can be performed; S2: connecting the two ends of each support rod (6) to the support plate (7) and the positioning plate (3) respectively, then passing the threaded sections at the two ends of each adjustment rod (20) through each positioning plate (3), and then connecting each positioning plate (3) to the two ends of the U-shaped positioning member (2); S3: placing the air-conditioning unit (101) on two support plates (7), with the spacing between the positioning plate (3) and the support plate (7) being greater than the height of the air-conditioning unit (101) to be installed, so as to facilitate installation and removal, turning the adjustment handle (18), thereby driving the cross bar (15) to move through the threaded fit between the handle (18) and the cross bar (15), until the inner side of the limit block (12) is in contact with the outer wall of the air-conditioning unit (101), thereby limiting the position of the air-conditioning unit (101) through each limit block (12), placing each air-conditioning unit (101) on each first support unit (1) respectively, and checking whether each air-conditioning unit (101) and the limit block (12) on each first support unit (1) are overlapped, and the next step can be carried out only after confirming that the overlap is correct and tightened; S4: installing the connecting member (27), first installing the U-shaped rod (28) on the cross frame (100), confirming whether the outer wall of the U-shaped rod (28) overlaps with the cross frame (100), and if so, proceeding to the next step. Before manufacturing the U-shaped positioning member (2) and the U-shaped rod (28), the size of the cross frame (100) is first confirmed, and the U-shaped positioning member (2) and the U-shaped rod (28) are manufactured by referring to the size of the cross frame (100), so that the manufactured U-shaped positioning member (2) and the U-shaped rod (28) are compatible with the cross frame (100) to maintain the stability of the structure; S5: connecting the two ends of the bottom plate (29) and the two ends of the U-shaped rod (28) together in a detachable manner, arranging one end of a plurality of pull ropes (26) on both sides of the support seat (23), and connecting the other ends of the plurality of pull ropes (26) to the upper ends of the U-shaped rods (28) on two adjacent connecting members (27); S6: a plurality of first tie rods (30) are respectively arranged at the lower end of the bottom plate (29), and the lower ends of two adjacent first tie rods (30) are connected via a second tie rod (31); the first tie rods (30) and the second tie rods (31) can be increased or decreased according to the structure of the actual steel structure factory building; S7: Then, the column connection part (105) used in conjunction with the second tie rod (31) and the connection piece (27) is mounted on the column (106). After completing the above steps, the stability of the column connection part (105) and the connection piece (27) is checked and then the pipeline (107) is laid. After the pipeline (107) is laid, it is supported by the column connection part (105), the support seat (23) and the second tie rod (31).

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