CN114354186A

CN114354186A - Large petrochemical unit installation correction device and correction method

Info

Publication number: CN114354186A
Application number: CN202111671192.5A
Authority: CN
Inventors: 林水泉; 张清华; 吕运容; 孙国玺; 朱冠华; 邓向武; 邵龙秋; 袁鹏慧
Original assignee: Guangdong University of Petrochemical Technology
Current assignee: Guangdong University of Petrochemical Technology
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-15

Abstract

The invention discloses a petrochemical large unit installation correcting device and a correcting method, wherein the device comprises a jacking device, a box body, four adjusting devices arranged at four corners of the box body and four control devices arranged on the side surface of the box body; the adjusting device comprises a first screw and a transmission assembly, and each control device is connected with the corresponding first screw through the transmission assembly to control the first screw to lift; the box is connected at the output of jacking device, and the top surface of first screw rod is connected with the mount pad, and the four corners of equipment is connected with four mount pads through the bolt respectively. The lift through control first screw rod of this application makes the high keeping unanimous of the mount pad on first screw rod top, and the level of equipment on the adjustment mount pad that can be simple swift need not to increase the gasket between mount pad and equipment, has solved through the altitude mixture control of first screw rod and has adopted the gasket to adjust can the error and adjust inconvenient problem.

Description

Large petrochemical unit installation correction device and correction method

Technical Field

The invention relates to the technical field of large petrochemical units, in particular to a device and a method for correcting the installation of a large petrochemical unit.

Background

With the development of science and technology, large petrochemical units are more and more complex, the operation conditions are more and more rigorous, the operation duration is long, the detection and maintenance difficulty is increased, and the operation risk is increased. On one hand, when the large petrochemical unit is initially installed and corrected, each device in the unit needs to be gradually corrected and centered; on the other hand, due to the long-term operation of large petrochemical units, various faults are inevitable, and equipment needs to be corrected and centered when the large petrochemical units are maintained or fault parts are replaced. Thereby ensuring the safe, reliable and stable operation of the large petrochemical unit.

The petrochemical large unit comprises a motor, a torque force transmitter, a gear box, a centrifugal fan and other equipment. At present, when each device of a large petrochemical unit is installed and corrected, gaskets are mainly placed at the four-foot connection positions of bases of devices such as a motor, a torsion transmitter, a gear box and a centrifugal fan, and the devices such as the motor, the gear box and the centrifugal fan are installed, corrected and centered by increasing and decreasing the gaskets. However, the above installation correction method has certain problems, which causes the unit installation correction effect to be unsatisfactory. Firstly, the gasket has low centering and correcting precision due to extrusion deformation or low production precision; secondly, by placing gaskets at the base connecting feet of each device of the large petrochemical unit, at least two technicians are required to be matched for installation, centering and alignment, time and labor are wasted in the process of correction and adjustment, generally, one unit is corrected and adjusted for 2 to 3 hours less, and more units are corrected and adjusted for one day or longer; thirdly, when the large petrochemical unit is installed, centered and corrected, deviation of the equipment installation, centering and correction precision can be caused due to the operation level of workers, the thickness specification error of the added gasket and the like; fourthly, because each equipment of the large petrochemical unit is relatively heavy, the equipment needs to be pried by tools such as iron bars for gasket addition and subtraction during correction, the operation is relatively difficult, and the correction accuracy has errors.

Therefore, when the large petrochemical unit is used for assembling each device, the centering and correcting efficiency of each device installation is effectively improved, the precision is improved, the safe, reliable and efficient operation of the large petrochemical unit is ensured, and the method has very important significance.

Disclosure of Invention

The invention aims to provide a large petrochemical unit installation correcting device and a correcting method, and aims to solve the problems that in the prior art, after a large petrochemical unit is assembled or parts are replaced, the efficiency of centering and correcting is low, the precision is not high, and the like.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a petrochemical large unit installation correcting device comprises a jacking device, a box body, four adjusting devices arranged at four corners of the box body and four control devices arranged on the side face of the box body;

the adjusting device comprises a first screw and a transmission assembly, and each control device is connected with the corresponding first screw through the transmission assembly to control the first screw to lift;

the box is connected at the output of jacking device, the top surface of first screw rod is connected with the mount pad, and the four corners of equipment is respectively through bolt and four the mount pad is connected.

Furthermore, the control device is a hand wheel which is rotationally connected with the box body, and the four hand wheels are all positioned on the same side of the box body;

a height display instrument is arranged on each of the four mounting seats, and a display disc is further arranged on one side of each hand wheel;

the display disc and the height display instrument are electrically connected with the controller in the box body.

Furthermore, the control device is a hand wheel which is rotationally connected with the box body, wherein two hand wheels are positioned on one side of the box body, and the other two hand wheels are positioned on the other side of the box body;

Furthermore, the adjusting device comprises a turbine seat and a first worm which are rotatably arranged in the box body, a first threaded sleeve is connected in the turbine seat, and the first screw is meshed with the first threaded sleeve;

the top end of the turbine seat is provided with a first turbine, the first turbine is meshed with the first worm, and at least two hand wheels are connected with the first worm;

and a limiting rod is further fixed in the box body and is in sliding connection with the guide groove on the first screw rod.

Furthermore, a second worm wheel is meshed between the first worm and the second worm, and the two hand wheels are connected with the second worm.

Furthermore, the jacking device comprises a hydraulic cylinder connected to the bottom plate, and the output end of the hydraulic cylinder is connected with the bottom surface of the box body;

the bottom plate is also fixedly connected with four guide rods, and the guide rods are connected with ear plates connected with four corners of the box body in a sliding manner.

Further, still including establishing the monitoring devices on the big unit gear box of petrochemical industry, monitoring devices is connected with the controller in the box, still be equipped with the alarm device with controller signal connection on the box.

Further, the device also comprises a rotary correcting disc connected to an output shaft of end equipment of the petrochemical large unit;

and a vibration sensor is also arranged on a bearing seat of the end equipment of the petrochemical large unit.

The invention also discloses a large petrochemical unit correction method, wherein four corners of each equipment base in the large petrochemical unit are respectively connected to four mounting seats of any one of the large petrochemical unit correction devices;

the method comprises the following steps:

acquiring height information of a mounting seat connected with four corners of certain equipment of a large petrochemical unit;

if the heights of the four mounting seats are inconsistent, the height of the first screw rod is adjusted through the control device, so that the heights of the four mounting seats are consistent; completing horizontal adjustment of the equipment;

repeating the above processes to complete the horizontal adjustment of all the devices of the large petrochemical unit;

and controlling the jacking device to work, so that the rotating shafts of all equipment in the large petrochemical unit are on the same axis, and completing centering adjustment.

Further, the method further comprises:

acquiring temperature data in a gear box of a large petrochemical unit through a monitoring device;

comparing the temperature data with expert database data stored in a controller to judge the state information of the equipment; wherein the device state information comprises an abnormal state and a normal state;

if the equipment is in a normal state, storing the temperature data of the equipment into expert database data;

and if the equipment data is in a fault state, determining the fault type of the equipment according to the temperature data to provide a maintenance plan, and controlling an alarm device to give an alarm.

According to the technical scheme, the embodiment of the invention at least has the following effects:

1. according to the height adjusting device, the height of the mounting seat at the top end of the first screw rod is kept consistent by controlling the lifting of the first screw rod, the level of equipment on the mounting seat can be simply and quickly adjusted, a gasket is not required to be added between the mounting seat and the equipment, and the problems of error and inconvenience in adjustment due to the adoption of the gasket are solved through the height adjustment of the first screw rod;

2. the control device adopts a design mode of the hand wheels, the hand wheels are arranged on the same side of the box body, so that an operator can conveniently adjust the height of the mounting seat, the height display instrument is arranged on one side of the hand wheels, the height of the mounting seat is displayed in real time through the height display instrument, and the adjustment of the operator is facilitated;

3. the adjusting device of this application adopts the turbine worm structure to combine the design of first screw rod, guaranteed the regulation precision of first screw rod on the one hand, on the other hand has guaranteed the auto-lock effect after the mount pad height adjustment, has guaranteed the adjustment effect of mount pad.

Drawings

FIG. 1 is a schematic view of the overall structure of a calibration device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a turbine housing according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a jacking device according to an embodiment of the present invention;

FIG. 5 is another schematic view of a jacking device according to an embodiment of the present invention;

FIG. 6 is a top view of the partial structure of FIG. 5;

FIG. 7 illustrates a method for adjusting a petrochemical large unit according to an embodiment of the present invention;

FIG. 8 illustrates a method for calibrating a gearbox in a petrochemical cluster according to an embodiment of the present invention.

Wherein: 1. a jacking device; 11. a base plate; 12. a hydraulic cylinder; 13. a guide bar; 111. a second screw; 112. a second thread insert; 113. a first sprocket; 114. a bearing; 115. a middle plate; 116. a servo motor; 117. a conveyor chain; 2. a box body; 3. an adjustment device; 31. a first screw; 311. a guide groove; 32. a turbine seat; 321. a first turbine; 33. a first worm; 34. a first threaded sleeve; 35. a second turbine; 36. a second worm; 37. a limiting rod; 4. a hand wheel; 5. and (7) mounting a seat.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 to 4, a petrochemical large unit installation correcting device comprises a jacking device 1, a box body 2, four adjusting devices 3 arranged at four corners of the box body 2, and four control devices arranged on the side surfaces of the box body 2; the adjusting device 3 comprises a first screw 31 and a transmission assembly, and each control device is connected with the corresponding first screw 31 through the transmission assembly to control the first screw 31 to lift; the box 2 is connected at the output of jacking device 1, and the top surface of first screw rod 31 is connected with mount pad 5, and the four corners of equipment is connected with four mount pads 5 through the bolt respectively.

The lift through control first screw rod of this application makes the high keeping unanimous of the mount pad on first screw rod top, and the level of equipment on the adjustment mount pad that can be simple swift need not to increase the gasket between mount pad and equipment, has solved through the altitude mixture control of first screw rod and has adopted the gasket to adjust can the error and adjust inconvenient problem.

In some embodiments, the control device is designed by a hand wheel 4, and in particular, the hand wheel 4 is rotatably connected to the side surface of the box body 2.

In some embodiments, the four handwheels 4 are all located on the same side of the housing 2; a height display instrument is arranged on each of the four mounting seats 5, and a display disc is arranged on one side of each hand wheel; the display disc and the height display instrument are electrically connected with the controller in the box body. The display panel that the hand wheel corresponds is used for showing the numerical value of height display appearance, and this kind of design is convenient for the operator to carry out the regulation of height.

The four hand wheels 4 are arranged on the same side of the box body, and the two adjusting devices 3 close to the side of the hand wheels have the same structure, as shown in the left side of fig. 2; the two adjusting devices 3 remote from the wheel side are identical in structure, as shown on the right side of fig. 2. The adjusting device 3 away from the hand wheel side is additionally provided with a second worm wheel 35 and a second worm 36 for transmission, which is described in detail below.

The adjusting device 3 includes a bearing disposed in the box, an inner ring of the bearing is rotatably connected with a turbine seat 32, the turbine seat 32 is structured as shown in fig. 3, and includes an integrally formed first turbine 321 and a first screw sleeve seat located below the first turbine 321, a first screw sleeve 34 is fixedly connected in the first screw sleeve seat through a screw, and the first screw sleeve 34 is in threaded engagement with the first screw rod 31. When the turbine base 32 rotates, the first screw sleeve 34 rotates to drive the first screw 31 therein to move.

In order to enable the first screw 31 to lift up and down in the movement process of the first screw sleeve 34, a limiting rod 37 is further connected in the box body, the end part of the limiting rod 37 is connected with a guide groove 311 on the first screw 31, and the design direction of the guide groove 311 is designed along the length direction of the first screw 31. Through the design of gag lever post 37 and guide way 311, can guarantee the lift of first screw rod 31 among the first swivel nut 34 rotation process, guarantee mount pad 5 altitude mixture control's effect.

In this embodiment, the adjusting device 3 further includes a first worm 33 engaged with the first worm wheel 321, the first worm 33 is fixedly connected to a central shaft of the hand wheel 4, and the hand wheel 4 is rotated to drive the first worm 33 to rotate, so as to achieve lifting of the first screw 31, that is, adjustment of the height of the first screw can be achieved.

In order to prevent the four handwheels 4 on the same side from interfering, a second worm wheel 35 and a second worm 36 are further arranged between the two first worms 33 and the handwheels 4 on the rear side, and the handwheels 4 are connected with the second worm 36 to ensure the height adjusting effect of the two mounting seats 5 on the rear side.

In other embodiments of the invention, the handwheels 4 are arranged on two sides of the box body 2, namely two handwheels 4 are designed on the front side, and two handwheels 4 are designed on the rear side. The design of the adjusting device does not need to adopt the second worm wheel 35 and the second worm 36 for transmission, and the design optimizes the structure of the adjusting device 3.

In other embodiments, the control device is in the form of a control button, in which case the housing 2 houses a servomotor, the output of which is connected to the first worm 33, and when in the form of a control button, the second worm gear 35 and the second worm 36 do not need to be designed in the adjustment device 3.

Servo motor, control button height display appearance and display panel all are connected with the controller in the box, and the display panel is used for showing the numerical information of height display appearance, and when the height of mount pad is inequality, the display panel shows, presses control button and drives servo motor work, and servo motor drives first turbine 321 through first worm 33 and rotates, and then has realized first screw rod 31's lift.

In the present embodiment, the height adjustment of the first screw 31 is facilitated in the form of a control button and a servo motor. In order to ensure the precision of the height adjustment of the first screw rod, the controller can directly calculate the height value to be adjusted according to the value obtained by the height display instrument, and calculate the time of the height value to be adjusted corresponding to the rotation of the servo motor. After the control button is pressed, the controller controls the servo motor to rotate for corresponding time so as to ensure the adjustment precision of the first screw rod.

This kind of design need not manual operation, can realize the automatic rising of first screw rod through pressing control button, and the effectual efficiency that improves the regulation.

In some embodiments, the jacking device 1 is in the form of a hydraulic cylinder 12, the hydraulic cylinder 12 is fixed at the center of the bottom plate 11, and the output end of the hydraulic cylinder 12 is connected with the bottom surface of the box body 2. The hydraulic cylinder 12 is designed for the purpose of height adjustment of the tank 2. The large petrochemical unit generally comprises four devices, namely a motor, a torque transmitter, a gear box and a centrifugal fan, and the four devices are different in size, so that the four devices need to be adjusted after the horizontal adjustment of a single device is completed, the centers of the four devices are located on the same axis, and the four devices are centered and adjusted by controlling the lifting of the hydraulic cylinder 12.

In order to guarantee the effect in the height adjusting process, a guide rod 13 is fixedly connected to the bottom plate 11, a linear bearing is connected to the guide rod 13 in a sliding mode, and the periphery of the linear bearing is fixedly connected with the lug plates at four corners of the box body 2 so as to guarantee the position accuracy in the jacking process of the box body 2.

This application adopts adjusting device's first screw rod 31 fine setting to realize horizontal adjustment, adopts the altitude mixture control of pneumatic cylinder 12 in the jacking device to carry out the centering and adjusts, and the effectual big unit installation centering of petrochemical industry and the effect and the precision of correction have been guaranteed.

In other embodiments of the application, the jacking device 1 can also adopt a mode as shown in fig. 5 and 6, and the jacking device 1 comprises a screw rod assembly and a chain wheel transmission structure. Specifically, the top ends of the four second screws 111 and the four second screws 111 are connected to the bottom surface of the box body 2, and the lifting of the box body 2 is driven by the lifting of the second screws 111.

The second screw 111 is in threaded connection with the second threaded sleeve 112, and the bottom end of the second threaded sleeve 112 and the inner ring of the bearing arranged on the middle plate 114 rotate, so that the second threaded sleeve 112 can rotate and can support and fix the second threaded sleeve 112. The outer periphery of the second threaded sleeve 112 is connected with a first chain wheel 113 through a screw, and the first chain wheel 113 is connected with a chain wheel on the output shaft of the servo motor 116 through a transmission chain 117. The servo motor works to drive the second threaded sleeve 112 to rotate through the transmission chain 117, and then the second threaded rod 111 is driven to lift. In order to ensure the lifting effect of the second screw rod 112, a limit pin is further arranged on the bottom surface of the middle plate 115, a guide groove along the axial direction of the second screw rod 111 is arranged on the second screw rod, and the limit pin is inserted into the guide groove to ensure that the second screw rod 111 is limited to only lift.

In this embodiment, the number of the transmission chains 117 is two, two chain wheels are arranged on the output shaft of the servo motor 116, each transmission chain is arranged as shown in fig. 6, and is connected to the two first chain wheels 113 to drive the two second screws 111 to lift, and the two transmission chains 117 work together to drive the four second screws to lift, so as to complete the lifting of the box body 2.

In order to ensure the working range of the second screw 111, a support plate is further connected to the bottom surface of the intermediate plate 115 by a link.

In this application, still set up monitoring devices, monitoring devices sets up on the big unit gear box of petrochemical industry, and monitoring devices and the controller signal connection in the box to transmit the monitoring result to the controller, still be equipped with the alarm device with controller signal connection on the box.

Monitoring devices in this application is the temperature sensor of design in the gear box, and temperature sensor is used for monitoring the temperature of fluid in the gear box, through the monitoring of the temperature monitoring of fluid in order to realize equipment running condition to can report to the police according to the monitoring result.

The monitoring device of the application can also adopt acoustic emission monitoring.

Two acoustic emission sensors are installed on equipment of a petrochemical large unit, the sensors are connected with a data acquisition card through cables, the data acquisition card is connected with a preamplifier through the cables, and the preamplifier is also connected with a multi-channel digital acoustic emission device through the cables. Setting a system sampling frequency interval to be 100-3MkHz, pre-amplification parameters to be 40db, a data acquisition card to be PCI-8, a transmission cable to be Coaxial cable, and a filtering interval to be 1-400 kHz. The large petrochemical unit and the multi-channel digital sound emission device are started, and after relevant parameters are set, relevant waveforms, amplitude values, power spectrums and the like can be obtained from the multi-channel digital sound emission device. Therefore, the obtained real-time data of the large petrochemical unit is compared with historical data in the multi-channel digital sound emitting device, the running state of the large petrochemical unit is monitored and judged, and smooth work of the unit is ensured.

The monitoring device of the application can also adopt a field dynamic balance correction mode.

As the large petrochemical unit runs for a long time, the unbalance faults are more, and the unbalance mainly comes from the rotor of the centrifugal fan. Currently, offline dynamic balance correction is actually adopted: firstly, the unit is shut down, then the rotor in the fan is disassembled, then the rotor is sent to a dynamic balance corrector to be repaired, and finally the corrected rotor is installed on the fan of the unit again. The method needs the shutdown of a large petrochemical unit to cause loss caused by production reduction; moreover, the assembly and disassembly are needed, and more time is consumed; meanwhile, manual installation also brings unbalance errors.

In order to solve the problem, the application also designs a rotary correcting disc connected to an output shaft of the end equipment of the petrochemical large unit; and a vibration sensor is also arranged on a bearing seat of the end equipment of the petrochemical large unit.

2 vibration sensors are installed on a bearing seat of the centrifugal fan, a reflective label is arranged on the rotary correcting disc, and the vibration sensors are connected with a field correcting analyzer. In addition, the infrared velocimeter is also connected with the on-site correction analyzer through a cable. And then, setting parameters of the on-site correction analyzer, including selection of correction modes and a supporting mode adopted by a rotor rotating disc, setting the position of the reflective label to be 0 degree, aligning the infrared tester to the position of the reflective label and the like. And starting a petrochemical large unit and a field correction analyzer to obtain the angle and the size of the unbalance amount of the rotor in the unit. And finally, according to the data of the on-site correction analyzer, a method for weighting or de-weighting the rotating correction disc is carried out, so that correction and repair are carried out, the unbalance amount is reduced, and the standard of safe operation of the unit is met. The method is simple to operate, does not need to disassemble and assemble equipment, improves the correction precision and the production efficiency, and ensures the safe, reliable and stable operation of the unit.

The application also provides a large petrochemical unit correction method, wherein four corners of each device in the large petrochemical unit are respectively connected to four mounting seats of the large petrochemical unit installation correction device;

the method comprises the following steps:

step 1, observing numerical information of a height display instrument through a display disc, and adjusting parts with difference in height numerical values;

and 2, adjusting the height of the first screw rod through a control device so as to enable the numerical values of the four height display instruments to be the same.

In this step, the control device may be a hand wheel 4 or a control button. When the handwheel 4 is adopted, the specific process is as follows, if the height of one mounting seat 5 is different from the heights of the other three mounting seats 5, the display of the display disc corresponding to the mounting seat is different. The first worm 33 is driven to rotate by rotating the hand wheel 4, the first worm 33 drives the first worm wheel 321 to rotate, and then the first screw 31 is driven to lift and lower for adjustment by the first threaded sleeve 34. When the control button is used for adjustment, the control button is pressed, the controller controls the servo motor to rotate, and the worm and gear drive the first screw rod 31 to lift.

And 3, adjusting a plurality of devices in the large petrochemical unit through the jacking device to enable the axes of the devices to be located on the same straight line so as to finish centering adjustment.

In this step, the hydraulic cylinder 12 in the jacking device below the equipment with a low level is controlled to ascend, so that the levels of the plurality of pieces of equipment are the same, and centering adjustment is completed.

Step 4, acquiring temperature data in a gear box of the petrochemical large unit through a monitoring device; comparing the temperature data with expert database data stored in a controller to judge the state information of the equipment; wherein the device state information comprises an abnormal state and a normal state; if the equipment is in a normal state, storing the temperature data of the equipment into expert database data; and if the equipment data is in a fault state, determining the fault type of the equipment according to the temperature data to provide a maintenance plan, and controlling an alarm device to give an alarm.

Specifically, monitoring devices can be temperature sensor, through installing 3 temperature sensor on the big unit gear box of petrochemical industry, the temperature of direct detection gear box inside fluid to 3 temperature sensor are connected with the controller, and the controller is connected with the motor.

And averaging the detection results T1, T2 and T3 of the 3 temperature sensors to obtain an effective value T at the same moment, wherein the effective value T represents the oil temperature of the gear box of the large petrochemical unit.

Under the conventional rotating speed of a large petrochemical unit, a large number of effective oil temperature values corresponding to normal states and various common fault types (bearing faults, rotating shaft faults and gear faults) of a gear box are collected and summarized to form an expert database.

If the effective value T < a DEG of the oil temperature of the gear box of the petrochemical large unit is in a normal state, and if T is more than or equal to a DEG and less than b DEG, the bearing fault is detected; t is greater than or equal to b degrees and less than c degrees, and is a gear fault; and T is greater than or equal to c DEG, and the rotating shaft fails. Wherein a < b < c.

The effective value T of the oil temperature of the gear box judges the running state of the gear box, the real-time result and the corresponding running state are displayed on a display device, if the fault occurs, the result is displayed in red, the alarm is given, and when the alarm data reaches the set maximum value, the controller immediately controls the motor to stop the large petrochemical unit, so that the large petrochemical unit is ensured to run safely, stably and reliably.

This application adopts three temperature sensor's mode, and the temperature of the big unit gear box interior fluid of acquisition petrochemical industry that can be comprehensive accurate has guaranteed the accuracy that fault type judged.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. A large petrochemical unit installation correcting device is characterized by comprising a jacking device, a box body, four adjusting devices arranged at four corners of the box body and four control devices arranged on the side surface of the box body;

2. The petrochemical large unit installation and correction device as recited in claim 1, wherein the control device is a handwheel rotationally connected to the box body, and the four handwheels are all located on the same side of the box body;

3. The petrochemical large unit installation and correction device as recited in claim 1, wherein the control device is a handwheel rotationally connected to the housing, two of the handwheels being located on one side of the housing and the other two handwheels being located on the other side of the housing;

4. The installation and correction device for the large petrochemical unit according to any one of claims 2 or 3, wherein the adjustment device comprises a turbine seat and a first worm rotatably arranged in a box body, a first threaded sleeve is connected in the turbine seat, and the first threaded rod is meshed with the first threaded sleeve;

5. The installation and correction device for a petrochemical large unit according to claim 4, wherein a second worm wheel is engaged between the first worm and the second worm, and the two hand wheels are connected with the second worm.

6. The installation and correction device for a petrochemical large unit according to claim 1, wherein the jacking device comprises a hydraulic cylinder connected to a bottom plate, and the output end of the hydraulic cylinder is connected with the bottom surface of the box body;

7. The large petrochemical unit installation and correction device as claimed in claim 1, further comprising a monitoring device arranged on the gear box of the large petrochemical unit, wherein the monitoring device is connected with a controller in the box body, and the box body is further provided with an alarm device in signal connection with the controller.

8. The large petrochemical unit installation correction device of claim 1, further comprising a rotary correction disc connected to an output shaft of an end equipment of the large petrochemical unit;

9. A correction method of a large petrochemical unit is characterized in that four corners of each device in the large petrochemical unit are respectively connected to four mounting seats of a large petrochemical unit mounting correction device according to any one of claims 1 to 8;

the method comprises the following steps:

10. The method for correcting a petrochemical large unit according to claim 9, further comprising: