CN116142718B

CN116142718B - Screw compressor unit assembly line

Info

Publication number: CN116142718B
Application number: CN202310401762.1A
Authority: CN
Inventors: 王红新; 赵宝国; 王晓林; 李明星; 于志强; 张会明; 张礼增; 姜华夏
Original assignee: Shandong Binglun Haizhuo Hydrogen Technology Research Institute Co ltd; Yantai Binglun Digital Technology Co ltd; Yantai Moon Compressor Co ltd
Current assignee: Shandong Binglun Haizhuo Hydrogen Technology Research Institute Co ltd; Yantai Binglun Digital Technology Co ltd; Yantai Moon Compressor Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-06-20
Anticipated expiration: 2043-04-17
Also published as: CN116142718A

Abstract

The utility model relates to the technical field of production of screw compressor units, and in particular discloses a screw compressor unit assembly line, which comprises: the track is used for passing through each station assembled by the screw compressor unit; the station supports are two in one group and symmetrically distributed on two sides of the rail, and each station is provided with two groups of station supports; a bracket capable of being placed on a set of station supports; two brackets on one station can be used for placing a screw compressor unit; an RGV trolley running on a rail; the RGV trolley is provided with a jacking mechanism which can jack up two brackets on one station at the same time; the utility model enables the screw compressor unit to freely run among a plurality of stations, does not need to manually carry the bracket, does not have complex electronic induction equipment, standardizes the working procedures and improves the assembly efficiency.

Description

Screw compressor unit assembly line

Technical Field

The utility model relates to the technical field of production of screw compressor units, in particular to a screw compressor unit assembly line.

Background

The compressor is a machine for raising gas pressure and delivering gas, and belongs to a working machine for converting power energy of a prime mover into gas pressure energy. The screw compressor unit comprises a motor, a screw compressor, a coupler and other auxiliary equipment and systems, the whole weight of the unit is large and is difficult to carry, so that the unit is usually immobilized and manually operated, one unit is always placed at one position from the beginning of assembly to the end of assembly, and an assembly person moves different parts, devices and equipment onto a unit station according to the assembly progress, so that the assembly efficiency is low and the procedure is disordered.

The utility model patent CN213140293U of China discloses two RGV trolleys with a mixed-use mode anti-collision, which comprises a track, RGV trolleys, station supports, brackets, an LG12 type screw compressor unit, an LG20L type screw compressor unit, trolley sensor sensing pieces, sensor assemblies and laser scanning radars. The system is applied to a screw compressor unit production line at the beginning of design, however, the inventor discovers that when the screw compressor unit assembly of the last station finishes the lower station, a bracket on the station cannot be automatically conveyed back to the initial station, so that manual conveying is needed, time and labor are wasted, a plurality of sensors, radars and other electronic components are arranged for avoiding collision of two RGV trolleys, the electronic components are easily damaged due to collision in the assembly process, the failure rate is high, and the practicability of the system is reduced.

Disclosure of Invention

In order to solve the problems, the utility model provides a screw compressor unit assembly line, so that the screw compressor unit can freely run among a plurality of stations, a bracket is not required to be manually carried, complicated electronic induction equipment is not required, the operation procedures are standardized, and the assembly efficiency is improved.

The utility model provides a screw compressor unit assembly line, comprising:

the track is used for passing through each station assembled by the screw compressor unit;

the station supports are two in one group and symmetrically distributed on two sides of the rail, and each station is provided with two groups of station supports;

a bracket capable of being placed on a set of station supports; two brackets on one station can be used for placing a screw compressor unit;

an RGV trolley running on a rail; the RGV trolley is provided with a jacking mechanism which can jack up two brackets on one station at the same time;

the bracket comprises:

the bracket body is hinged with end parts at two ends, and the end parts can be bent downwards under the action of gravity;

the locking mechanism is arranged on the bracket main body, the number of the locking mechanisms is four, two groups of the locking mechanisms are used for locking end parts, and the other two groups of the locking mechanisms are used for locking bottom skids of the screw compressor unit.

By adopting the technical scheme, the screw compressor unit can freely run among a plurality of stations without manually carrying brackets, so that the operation procedures are standardized, and the assembly efficiency is improved; and no complicated electronic induction equipment is arranged, so that the failure rate is reduced.

Further, the locking mechanism includes:

the electromagnetic mechanism is transversely provided with a sliding rod in a penetrating manner in the middle of the electromagnetic mechanism, one end of the sliding rod is connected with a locking pin, and a limiting block is arranged around the locking pin and used for limiting the sliding of the locking pin in the direction perpendicular to the sliding rod; a spring is sleeved between the locking pin and the electromagnetic mechanism through a sliding rod;

the stop block is fixed at the other end of the rod of the sliding rod;

the proximity switch is arranged beside the stop block.

Further, the both ends symmetry of bracket main part is provided with a bottom sledge lock, and a bottom sledge lock includes:

a first link hinged to the bracket main body;

the L-shaped buckle is fixed at the upper end of the first connecting rod;

the compression bar is hinged to the lower end of the first connecting rod; the lower part of the compression bar is provided with a second locking groove which is matched with the locking mechanism;

the guide structure is fixed beside the L-shaped buckle;

the bottom sledge of the screw compressor unit is arranged between the guide structures at the two ends of the bracket main body.

By adopting the technical scheme, the bottom sledge can be conveniently locked, the bottom sledge can be automatically locked when put down, and the bottom sledge can be automatically unlocked only by opening the electromagnetic mechanism when taken away.

Further, the side of the RGV trolley is provided with a sensor assembly, and each station is provided with a sensing piece matched with the sensor assembly.

Further, the screw compressor unit assembly line still includes driving system, and driving system includes:

two travelling frames parallel to the track;

the travelling crane device runs between the two travelling crane frames;

the traveling device includes:

the two cart running mechanisms run on the two running frames; a first cross beam is fixed between the two cart running mechanisms, a cart running mechanism is running on the first cross beam, a hoisting mechanism is arranged in the middle of the cart running mechanism, and the lower end of the hoisting mechanism is suspended with a clamp assembly through two steel wire ropes;

the clamp assembly includes:

the two ends of the upper part of the second cross beam are provided with tension sensors, the tension sensors are hinged with lifting lugs, the lower ends of the two steel wire ropes are bound on the lifting lugs, and the upper ends of the two steel wire ropes are wound inside the lifting mechanism;

the slideway is arranged in the middle of the cross beam and is parallel to the cross beam;

and the two groups of hanging tongs are in sliding contact with the slideway.

By adopting the technical scheme, the tension sensor detects the tension of the two steel wire ropes, the control system is uploaded, the gravity center position of the heavy object is judged, after the heavy object reaches a designated station, the gravity center of the heavy object is positioned at the designated position by finely adjusting the positions of the cart running mechanism and the trolley running mechanism, so that the heavy object can be easily placed at an ideal position when the heavy object is put down, the accurate assembly of the large-scale part is realized, the time and the labor are saved, and the operation efficiency is improved.

Further, the hanging tongs include:

two I-shaped plates fixedly contacted with each other; the I-shaped plate is in sliding contact with the slideway; the lower part of the middle of the two I-shaped plates is coaxially hinged with three second connecting rods, two sides of the lower end of one second connecting rod in the middle are hinged with two clamp hooks which are fixedly contacted with each other, the middle of the lower end of the other two second connecting rods is hinged with one clamp hook, and the clamp hooks and the other two clamp hooks are distributed oppositely to form a claw-shaped structure; the middle parts of the three clamp hooks are mutually hinged; the grabbing side of claw-shaped structure is fixed with the L shape of mutual symmetry and lifts and hold in the palm, and one of them second connecting rod still articulates with the articulated department of pincers and colludes has the locking to collude, and the below of this articulated department is provided with the round pin axle with locking to collude complex in the well lower part of pincers and collude.

By adopting the technical scheme, when the heavy objects are clamped, the positions of the two hanging tongs can be adjusted according to the shapes of the heavy objects, then the hanging tongs automatically shrink under the action of gravity to clamp or hold the heavy objects, and the hanging tongs are suitable for hanging the heavy objects with various shapes and sizes. If the easy-damaged parts are required to be carried, the locking hook can be hung on the pin shaft, so that the hanging pliers are prevented from continuously clamping inwards, and the parts are prevented from being damaged.

Further, the screw compressor unit assembly line still includes vision detecting system, and vision detecting system is including setting up the camera on every station.

Further, the camera collects the state of the screw compressor unit, compares the state with the screw compressor unit in the completed state in the database, automatically recognizes the difference characteristic, and feeds the difference characteristic back to technicians and field operators.

By adopting the technical scheme, assembly references can be provided for technicians and field operators, whether the assembly is correct or not can be checked, and the error rate is reduced.

Drawings

FIG. 1 is a schematic illustration of a screw compressor unit assembly line according to an embodiment of the present utility model;

FIG. 2 is a block diagram of a bracket according to an embodiment of the present utility model;

FIG. 3 is an internal structural view of a bracket according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an embodiment RGV cart of the present utility model;

FIG. 5 is a block diagram of a clamp assembly according to an embodiment of the present utility model.

In the figure: 100-rail, 200-station support, 300-bracket, 310-bracket body, 320-end, 330-locking mechanism, 331-electromagnetic mechanism, 332-slide bar, 333-locking pin, 334-spring, 335-stop, 336-proximity switch, 340-bottom sled lock, 341-first link, 342-L-clip, 343-plunger, 344-second locking slot, 345-guide structure, 400-RGV cart, 410-jack mechanism, 420-sensor assembly, 500-row carriage, 600-row carriage, 610-clamp assembly, 611-second beam, 612-tension sensor, 613-lifting lug, 614-slide, 615-hanging clamp, 6151-i-plate, 6152-second link, 6153-clamp hook, 6154-L-lifting support, 6155-locking hook, 6156-pin shaft.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

The present utility model will be further illustrated by the following examples, which are not intended to limit the scope of the utility model.

Referring to fig. 1-5, a screw compressor assembly line includes a rail 100, an RGV cart 400, a station support 200, a carriage 300, a crane system, a vision inspection system. The rail 100 is arranged at each station assembled by the screw compressor unit, station supports 200 are arranged at two sides of the rail 100 of each station, and brackets 300 can be placed on the station supports 200. The RGV cart 400 runs on the rail 100, and a jacking mechanism 410 is provided on the RGV cart 400, and can jack up the carriage 300 and transport the carriage 300 to the arbitrary station support 200. The travelling crane system is used for carrying large components required by the assembly of the screw compressor unit. The visual detection system is used for detecting whether the assembly of each assembly link is correct.

Two groups of station supports 200 are fixed on the ground, two groups of station supports 200 can be placed on two brackets 300 which are parallel to each other, and one screw compressor group can be placed on two brackets 300 which are parallel to each other. The bracket 300 includes a bracket body 310, and both ends of the bracket body 310 are hinged with end portions 320, and the end portions 320 may be bent downward by about 90 ° under the action of gravity. The bracket main body 310 is provided with a locking mechanism 330, the bracket main body comprises an electromagnetic mechanism 331, a sliding rod 332 transversely penetrates through the middle of the electromagnetic mechanism 331, one end of the sliding rod 332 is connected with a locking pin 333, a spring 334 is sleeved between the locking pin 333 and the electromagnetic mechanism 331 through the sliding rod 332, and a limiting block is arranged around the locking pin 333 and used for limiting the sliding of the locking pin 333 in the direction perpendicular to the sliding rod 332. A stopper 335 is fixed at the other end of the slide bar 332 for preventing the slide bar 332 from sliding down from the electromagnetic mechanism 331. A proximity switch 336 is provided beside the stop 335, and when the stop 335 is close, the proximity switch 336 sends an "on" signal, and when the stop 335 is far away, the proximity switch 336 sends an "off" signal. Four sets of locking mechanisms 330 are provided on the bracket body 310, two of which are used to lock the ends 320 and two of which are used to lock the bottom sled of the screw compressor block.

Each end 320 of the bracket 300 is provided with a first locking groove that mates with the locking pin 333. When the electromagnetic mechanism 331 is not electrified, the sliding rod 332 is not subjected to electromagnetic force, and the sliding rod 332 and the locking pin 333 slide towards the direction of the first locking groove under the action of the spring 334, so that the locking pin 333 is inserted into the first locking groove, and at the moment, the end 320 is horizontal and cannot bend. When the electromagnetic mechanism 331 is electrified, the slide rod 332 slides away from the first locking groove under the action of electromagnetic force, and the locking pin 333 is pulled away from the first locking groove, at this time, the end 320 may be bent downward under the action of gravity.

The both ends of bracket main part 310 are articulated respectively have first connecting rod 341, and the upper end of first connecting rod 341 is fixed with L type buckle 342, and the lower extreme articulates has depression bar 343, is provided with limit structure on the bracket main part 310 for depression bar 343 can only follow vertical direction and remove. The lower portion of the pressing lever 343 is provided with a second locking groove 344 engaged with the locking pin 333. A guide structure 345 is fixed beside the L-shaped buckle 342, and a bottom sled of the screw compressor unit is placed between the guide structures 345 at both ends of the bracket body 310. The first connecting rod 341, the L-shaped buckle 342, the pressing rod 343, the second locking groove 344 and the guiding structure 345 together form a bottom sled lock 340 for fixing a bottom sled of the screw compressor unit. Taking fig. 3 as an example, the pressing rod 343 may extend upwards out of the upper surface of the bracket 300, at this time, the L-shaped buckle 342 rotates anticlockwise, so that the bottom sled of the screw compressor unit is placed between the two sets of guiding structures 345, and simultaneously, the bottom sled pushes the pressing rod 343 downwards, the pressing rod 343 moves downwards, drives the first connecting rod 341 and the L-shaped buckle 342 to rotate clockwise, so that the top of the L-shaped buckle 342 clamps the edge of the bottom sled, and at this time, the second locking groove 344 at the lower part of the pressing rod 343 is locked by the locking pin 333. If unlocking is required, the corresponding electromagnetic mechanism 331 is controlled to be electrified, and the corresponding locking pin 333 is retracted, so that the locked state can be released.

The RGV trolley 400 is fixedly connected with a low-voltage servo motor, and the RGV trolley 400 can horizontally move along the track 100 under the control of the low-voltage servo motor; the lifting mechanism 410 is fixedly connected to the upper end of the RGV trolley 400, and the lifting mechanism 410 can lift up the two brackets 300 at the same time, so that the two brackets 300 are separated from the station support 200. The top of the jacking mechanism 410 is provided with a boss, and the bottom of the bracket 300 is provided with a hole matching with the boss for ensuring alignment of the jacking mechanism 410 with the bracket 300. The sides of the RGV cart 400 are provided with sensor assemblies 420, and at each station are provided with sensing tabs that mate with the sensor assemblies 420, and when the RGV cart 400 reaches a given station, the sensor assemblies 420 detect alignment with the sensing tabs, i.e., indicate that the RGV cart 400 is in place.

The traveling system comprises two traveling frames 500 parallel to the track 100, a traveling device 600 is arranged in the middle of the traveling system, the traveling device 600 comprises two large-vehicle running mechanisms which are arranged on the traveling frames 500, a first cross beam is fixed between the two large-vehicle running mechanisms, a small-vehicle running mechanism is arranged on the first cross beam, a hoisting mechanism is arranged in the middle of the small-vehicle running mechanism, and a clamp assembly 610 is hung at the lower end of the hoisting mechanism through two steel wire ropes. The clamp assembly 610 comprises a second cross beam 611, wherein tension sensors 612 are arranged at two ends of the upper part of the second cross beam 611, lifting lugs 613 are hinged to the tension sensors 612, the lower ends of two steel wires are bound to the lifting lugs 613, and the upper ends of the two steel wires are wound inside the lifting mechanism. A slideway 614 is arranged in the middle of the second beam 611, and the slideway 614 is parallel to the second beam 611. Two sets of hanging tongs 615 are slidably arranged in the slideway 614, each set of hanging tongs 615 comprises two I-shaped plates 6151 which are fixedly contacted with each other, and the I-shaped plates 6151 are in sliding contact with the slideway 614. The lower part in the middle of the two I-shaped plates 6151 is coaxially hinged with three second connecting rods 6152, two sides of the lower end of one second connecting rod 6152 in the middle are hinged with two clamp hooks 6153 which are fixedly contacted with each other, the middle of the lower end of the other two second connecting rods 6152 is hinged with one clamp hook 6153 which is distributed opposite to the other two clamp hooks 6153 to form a claw-shaped structure, and the middle parts of the three clamp hooks 6153 are mutually hinged. The grabbing sides of the claw-shaped structures are fixed with mutually symmetrical L-shaped lifting supports 6154. A locking hook 6155 is also hinged at the hinged position of one second connecting rod 6152 and the clamp hook 6153, and a pin shaft 6156 matched with the locking hook 6155 is arranged at the middle lower part of the hinge and the clamp hook 6153. When the heavy object is clamped, the positions of the two hanging tongs 615 can be adjusted according to the shape of the heavy object, and then the hanging tongs 615 automatically shrink under the action of gravity to clamp or hold the heavy object, and the heavier the heavy object is, the larger the clamping force is. If the quick-wear parts are to be carried, the locking hook 6155 can be hung on the pin shaft 6156, so that the hanging tongs 615 can be prevented from being clamped inwards continuously, the parts are prevented from being damaged, and the parts are placed on the four L-shaped lifting supports 6154 and then are fixed properly. Illustratively, the L-shaped lifting support 6154 is made of soft materials with high friction coefficient, so that the friction coefficient is increased, and the suspended parts are protected. The tension sensor 612 is used for detecting the tension of two steel wire ropes, uploading the control system, judging the gravity center position of the heavy object, and after the heavy object reaches a designated station, finely adjusting the positions of the cart running mechanism and the trolley running mechanism to enable the gravity center of the heavy object to be positioned at the designated position, so that the heavy object can be easily placed at an ideal position when being put down, precise assembly of large-scale components is realized, time and labor are saved, and the operation efficiency is improved.

Further, a part storage area is arranged at one end or two ends of the production line, and the traveling system can hoist the required parts from the part storage area. Further, the driving device 600 may be one or more groups as required.

The visual detection system comprises one or more cameras arranged on each station, the states of the screw compressor units are collected through the cameras, the states of the screw compressor units are compared with the units in the completed states in the database, the difference characteristics are automatically identified, the difference characteristics are fed back to technicians and on-site operators, and accordingly assembly references are provided for the technicians and the on-site operators, and whether the assembly is correct or not is checked.

The application method of the utility model is as follows:

each station is provided with two sets of station supports 200, two brackets 300 are placed on the two sets of station supports 200, the screw compressor unit is placed on the two brackets 300, and the RGV trolley 400 carries the screw compressor unit among different stations by lifting and carrying the brackets 300. The utility model can support the simultaneous assembly of a plurality of units: each unit sequentially passes through each station, after the assembly is completed at the last station, the assembled unit is carried away, at this time, the RGV trolley 400 lifts the two brackets 300 and then the electromagnetic mechanism 331 corresponding to the first locking groove of the two brackets 300 is powered, the end 320 of the bracket 300 is bent downwards under the action of gravity, the horizontal length of the bent bracket 300 is smaller than the distance between each group of station supports 200, at this time, the lifting mechanism 410 of the RGV trolley 400 descends, so that the upper end of the bracket 300 on the lifting mechanism is lower than the top of the station supports 200, and the RGV trolley 400 is allowed to convey the bracket 300 to the initial station along the bottom. The travelling crane system carries large parts from the storage area to each station and accurately places the large parts at specific positions. The visual detection system performs recognition guidance on the assembly condition of each station.

The foregoing description of the preferred embodiments of the present utility model should not be taken as limiting the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A screw compressor block assembly line comprising a rail (100) and an RGV trolley (400), wherein the rail (100) is routed through each station of the screw compressor block assembly; further comprises:

the station supports (200) are two in one group and symmetrically distributed on two sides of the track (100), and each station is provided with two groups of station supports (200);

-a cradle (300) capable of being placed on a set of said station supports (200); two brackets (300) on a station can be used for placing a screw compressor unit;

the RGV trolley (400) is run on the track (100); the RGV trolley (400) is provided with a jacking mechanism (410) which can jack up two brackets (300) on one station at the same time;

the bracket (300) comprises:

a bracket body (310), wherein two ends of the bracket body (310) are hinged with end parts (320), and the end parts (320) can bend downwards under the action of gravity;

the locking mechanism (330) is arranged on the bracket main body (310), the number of the locking mechanism (330) is four, two groups of the locking mechanism are used for locking the end part (320), and the other two groups of the locking mechanism are used for locking the bottom sleds of the screw compressor unit.

2. The screw compressor assembly line of claim 1, wherein the locking mechanism (330) comprises:

the electromagnetic mechanism (331), the middle part of the electromagnetic mechanism (331) transversely penetrates through and is provided with a slide bar (332), one end of the slide bar (332) is connected with a locking pin (333), and a limiting block is arranged around the locking pin (333) and used for limiting the sliding of the locking pin (333) in the direction perpendicular to the slide bar (332); a spring (334) is sleeved between the locking pin (333) and the electromagnetic mechanism (331) through the sliding rod (332);

a stopper (335) fixed to the other end of the rod of the slide rod (332);

and a proximity switch (336) disposed beside the stopper (335).

3. The screw compressor assembly line of claim 1, wherein the bracket body (310) is symmetrically provided with bottom sled locks (340) at both ends, the bottom sled locks (340) comprising:

a first link (341) hinged to the bracket main body (310);

an L-shaped buckle (342) fixed at the upper end of the first connecting rod (341);

a pressing rod (343) hinged to the lower end of the first connecting rod (341); a second locking groove (344) is formed in the lower part of the pressing rod (343) and is matched with the locking mechanism (330);

a guide structure (345) fixed beside the L-shaped buckle (342);

a bottom sled of a screw compressor unit is placed between the guide structures (345) at both ends of the bracket body (310).

4. The screw compressor assembly line of claim 1, wherein a sensor assembly (420) is provided on a side of the RGV trolley (400), and a sensing tab is provided on each station that mates with the sensor assembly (420).

5. The screw compressor assembly line of claim 1, further comprising a drive system comprising:

two travelling frames (500) parallel to the track (100);

the travelling crane device (600) is operated between the two travelling crane frames (500);

the traveling device (600) comprises:

the two cart running mechanisms run on the two cart frames (500); a first cross beam is fixed between the two cart running mechanisms, a cart running mechanism is running on the first cross beam, a lifting mechanism is arranged in the middle of the cart running mechanism, and the lower end of the lifting mechanism is suspended with a clamp assembly (610) through two steel wire ropes;

the clamp assembly (610) includes:

the lifting device comprises a second cross beam (611), wherein tension sensors (612) are arranged at two ends of the upper part of the second cross beam (611), lifting lugs (613) are hinged to the tension sensors (612), the lower ends of the two steel wire ropes are bound to the lifting lugs (613), and the upper ends of the two steel wire ropes are wound inside the lifting mechanisms;

the slideway (614) is arranged in the middle of the second cross beam, and the slideway (614) is parallel to the second cross beam;

two sets of lifting tongs (615) in sliding contact with the slideway (614).

6. The screw compressor element assembly line of claim 5, wherein the lifting clamp (615) comprises:

two I-shaped plates (6151), wherein the two I-shaped plates (6151) are fixedly contacted; the I-shaped plate (6151) is in sliding contact with the slideway (614); three second connecting rods (6152) are coaxially hinged to the lower portion of the middle of the two I-shaped plates (6151), two clamp hooks (6153) which are fixedly contacted with each other are hinged to the two sides of the lower end of one second connecting rod (6152) in the middle, one clamp hook (6153) is hinged to the middle of the lower end of the other two second connecting rods (6152), and the clamp hooks (6153) and the other two clamp hooks (6153) are distributed oppositely to form a claw-shaped structure; the middle parts of the three clamp hooks (6153) are hinged with each other; the grabbing side of claw-shaped structure is fixed with L shape that is symmetrical mutually and lifts support (6154), one of them second connecting rod (6152) with the articulated department of pincers hook (6153) still articulates has locking hook (6155), and the below of this articulated department is provided with in the well lower part of pincers hook (6153) with locking hook (6155) complex round pin axle (6156).

7. The screw compressor assembly line of claim 1, further comprising a visual inspection system including a camera disposed at each station.

8. The screw compressor assembly line of claim 7, wherein the camera captures the status of the screw compressor unit, compares the status with the completed status screw compressor unit in the database, automatically identifies the discrepancy profile, and feeds the discrepancy profile back to the technician and field operator.