A lifting core pulling machine with self-adjusting center of gravity
By using a movable column adjustment system driven by a weight adjustment motor and a threaded screw in the core extractor, the problem of the traditional core extractor is easily lost during the lifting process, and the center of gravity is realized, which improves operational safety and operation efficiency.
Patent Information
- Application Number
- CN202111356111.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-16
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-11-16
AI Technical Summary
Traditional core extractors are prone to lose balance during lifting, resulting in high operational difficulty, high safety risks, and limited lifting height, affecting operating efficiency.
A lifting core puller is adopted that self-adjusts the center of gravity. The threaded screw feed is driven by the weight adjustment motor, and the movable suspension column is pushed to adjust the lifting position to maintain the lifting balance.
It realizes automatic adjustment of the center of gravity during the lifting process, avoids excessive swing of the core puller, improves operational safety and operating efficiency, and reduces safety risks.
Smart Images
Figure CN114229694B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of petroleum refining and maintenance, in particular to a lifting core pulling machine with self-adjusting center of gravity. Background Art
[0002] In the field of oil refining inspection and maintenance, it is often necessary to install the heat exchanger tube bundle into the heat exchanger shell for installation or maintenance. The traditional core puller adopts a simple fixed rope connection. When hoisting, people often need to tie another rope on the core puller to keep balance, which is a great test of the crane driver's level. At the same time, when placing the tooling on the core puller into the workstation, due to the axial swing of the tooling itself, if the operator is not careful, there will be a risk of overturning. In addition, considering the limitations of the on-site environment during the hoisting operation, the hoisting height is often very limited, which makes the safety risk high and the operation intensity high. Therefore, it is imperative to develop a hoisting device suitable for this operation. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a lifting core pulling machine with self-adjusting center of gravity, which adopts a weight-adjusting motor to drive the threaded screw to feed, and then pushes the movable hanging column to adjust the lifting position, thereby achieving the purpose of maintaining the lifting balance.
[0004] The present invention provides a self-adjusting center of gravity lifting core pulling machine, comprising two parallel guide rails, and a propulsion mechanism arranged on the guide rails and moving axially along the guide rails, a connector arranged along the cross section is arranged between the middle sections of the two guide rails, a weight adjustment motor linked to the propulsion mechanism is arranged at the tail end of the guide rail, a level monitor is arranged inside the weight adjustment motor, a transverse structural plate is arranged at the bottom of the front end of the guide rail, a side plate parallel to the guide rail is arranged on the outer side of each guide rail, the front end of each side plate is connected to the end corresponding to the transverse structural plate, the tail end of each side plate is connected to the corresponding end of the connector, and each side A corresponding lifting mechanism is provided on the outer side of the front end of the plate, and a movable hanging column in a "U" shape as a whole is provided on the outer side of the tail ends of the two side plates. The two ends of the movable hanging column are respectively hingedly connected to the corresponding outer sides of the side plates, and the tops of the two ends of the movable hanging column are respectively provided with hanging holes. The transverse structural plate, the bottom of the movable hanging column and the bottom of the connecting body are all provided with corresponding coaxial through holes, and a threaded screw connected to the through hole, wherein the threaded screw is connected to the through holes at the bottom of the connecting body and the movable hanging column through threads, the threaded screw is connected to the through holes of the transverse structural plate through bearings, and the power end of the weight-adjusting motor is connected to the threaded screw through a belt.
[0005] In the above technical solution, a transmission shaft parallel to the guide rail is provided between each guide rail and its corresponding side plate, and both ends of the transmission shaft are respectively connected to the top surface of the connector and the top surface of the transverse structural plate, and a plurality of turns of transmission chains are axially spaced apart on the transmission shaft, and each transmission chain is circumferentially arranged along the side wall of the transmission shaft. The propulsion mechanism is equipped with a drive motor with a power end facing the corresponding drive shaft, and a transmission gear is provided at the power end of the drive motor, and the transmission gear is meshed and connected with the plurality of turns of transmission chains to form a transmission pair, which helps to convert the rotation of the transmission gear into forward or backward movement of the propulsion mechanism along the guide rail.
[0006] In the above technical solution, a fixing pin is provided between adjacent transmission chains at the bottom of the transmission shaft to keep adjacent transmission chains spaced apart.
[0007] In the above technical solution, the lifting mechanism on the outer side of the front end of each side panel is a fixed hanging column, and the two fixed hanging columns are provided with corresponding lifting holes.
[0008] In the above technical solution, the level monitor inside the weight-adjusting motor is a gyroscope.
[0009] The self-adjusting center of gravity lifting core pulling machine of the present invention has the following beneficial effects: the invention is placed horizontally, the tooling is placed on the guide rail of the present invention and in front of the propulsion mechanism, the rope is passed through the fixed hanging column and the movable hanging column hole for lifting, and the weight adjustment motor is started.
[0010] During lifting, the weight-adjusting motor will automatically perform forward or reverse correction in the air as the core-pulling machine swings as a whole, driving the threaded screw to rotate. The rotation of the screw will drive the movable hanging column to move forward and backward, thereby changing the lifting position of the lifting rope to keep the overall center of gravity of the lifting device stable, avoiding excessive swing of the core-pulling machine in the air and affecting the smooth progress of the operation. After the heat exchanger tube bundle is hoisted and sent to the predetermined installation position by the present invention, the propulsion mechanism continues to move forward through remote control until the tooling is sent to the predetermined workstation. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a front view of the overall structure of the lifting core-pulling machine with self-adjusting center of gravity of the present invention;
[0012] Figure 2 It is a top view of the overall structure of the lifting core-pulling machine with self-adjusting center of gravity of the present invention;
[0013] Figure 3 It is an enlarged schematic diagram of the structure of the adjusting mechanism such as the weight-adjusting motor and the threaded screw in the lifting core-pulling machine with self-adjusting center of gravity of the present invention;
[0014] Figure 4 It is a schematic diagram of the structure enlargement of the pushing mechanism such as the propulsion mechanism in the lifting core pulling machine with self-adjusting center of gravity of the present invention. DETAILED DESCRIPTION
[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.
[0016] See also Figure 1 to Figure 2 The self-adjusting center-of-gravity lifting core-pulling machine of the present invention comprises two parallel guide rails 5, and a propulsion mechanism 1 arranged on the guide rails 5 and moving axially along the guide rails 5, a connector 13 arranged along the cross section is arranged between the middle sections of the two guide rails 5, a weight adjustment motor 6 linked to the propulsion mechanism 1 is arranged at the tail end of the guide rail 5, and a level monitor (not shown in the figure) is arranged inside the weight adjustment motor 6, a transverse structural plate 11 is arranged at the bottom of the front end of the guide rail 5, and a side plate 12 parallel to the guide rail 5 is arranged on the outer side of each guide rail 5, and the front end of each side plate 12 is connected to the end corresponding to the transverse structural plate 11, see Figure 3 The tail end of each side panel 12 is connected to the corresponding end of the connecting body 13, and a corresponding lifting mechanism is provided on the outer side of the front end of each side panel 12. The outer sides of the tail ends of the two side panels 12 are provided with movable hanging columns 9 in a "U" shape as a whole. The two ends of the movable hanging columns 9 are respectively hingedly connected to the corresponding outer sides of the side panels 12, and the tops of the two ends of the movable hanging columns 9 are respectively provided with hanging holes. The transverse structural plate 11, the bottom of the movable hanging column 9 and the bottom of the connecting body 13 are all provided with corresponding coaxial through holes, and a threaded screw 8 connected to the through hole, wherein the threaded screw 8 is connected to the through holes at the bottom of the connecting body 13 and the movable hanging column 9 by threads, and the threaded screw 8 is connected to the through hole of the transverse structural plate 11 by bearings, and the power end of the weight adjustment motor 6 is connected to the threaded screw 8 by a belt 7.
[0017] See also Figure 4 A transmission shaft 4 parallel to the guide rail 5 is provided between each guide rail 5 and its corresponding side plate 12, and both ends of the transmission shaft 4 are respectively connected to the top surface of the connector 13 and the top surface of the transverse structural plate 11, and a plurality of turns of transmission chains 14 are axially spaced apart on the transmission shaft 4, and each transmission chain 14 is circumferentially arranged along the side wall of the transmission shaft 4. The propulsion mechanism 1 is equipped with a driving motor (not shown in the figure) with a power end facing the corresponding transmission shaft 4, and a transmission gear 3 is provided at the power end of the driving motor, and the transmission gear 3 is meshed and connected with the multi-turn transmission chain 14 to form a transmission pair, which helps to convert the rotation of the transmission gear 3 into forward or backward movement of the propulsion mechanism 1 along the guide rail 5.
[0018] A fixing pin 2 is provided at the bottom of the transmission shaft 4 between adjacent transmission chains 14 to keep the adjacent transmission chains 14 spaced apart.
[0019] The hoisting mechanism on the outer side of the front end of each side plate 12 is a fixed hanging column 10, and the two fixed hanging columns 10 are provided with corresponding hanging holes.
[0020] The level monitor inside the weight-adjusting motor 6 is a gyroscope.
[0021] The principle of the key parts of the lifting core pulling machine with self-adjusting center of gravity of the present invention is briefly described as follows:
[0022] Propulsion mechanism 1: The core moving component has a drive motor inside, which can be controlled by infrared remote control. The drive motor can rotate forward or reverse to drive the propulsion mechanism 1 forward or backward. It can push the tooling (not shown in the figure) set on the guide rail 5 into the predetermined work position, and at the same time it is linked with the weight adjustment motor 6. When the drive motor moves, the weight adjustment motor 6 is activated by default.
[0023] Weight-adjusting motor 6: a component that controls the forward and backward movement of the movable suspension column 9, with a built-in level monitor such as a gyroscope, used to monitor whether the weight-adjusting motor 6 is horizontal, thereby determining whether the present invention is in a horizontal position. If the weight-adjusting motor 6 is not in a horizontal position, the weight-adjusting motor 6 rotates forward or reversely according to the result to control the forward and backward movement of the threaded screw 8, thereby driving the movable suspension column 9 to move forward and backward, so that the suspension rope (not shown in the figure) can be adjusted to ensure that the present invention is always in a horizontal position. The weight-adjusting motor 6 is not started by default. Only when the driving motor of the propulsion mechanism 1 is in motion, the weight-adjusting motor 6 automatically wakes up and moves by itself. The weight-adjusting motor 6 can be controlled by infrared remote control to rotate forward or reverse and wake up to adjust itself to maintain the level.
[0024] Movable suspension column 9: A part that can make a slight rotation on the side plate 12. The belt 7 of the weight adjustment motor 6 drives the threaded screw 8 to feed and move back and forth. The movable suspension columns 9 on both sides share a threaded screw 8. The connection between the movable suspension column 9 and the threaded screw 8 is matched with the threaded screw 8 through a threaded hole. As the threaded screw 8 rotates, the two suspension columns are driven to swing back and forth.
[0025] The coordination relationship of the components of the self-adjusting center of gravity lifting core pulling machine of the present invention is as follows:
[0026] The propulsion mechanism 1 is arranged on the guide rail 5, and a driving motor is arranged inside the propulsion mechanism 1, which is connected with a transmission gear 3, and the transmission gear 3 is meshed with a transmission chain 14. A fixed pin 2 is arranged under the transmission shaft 4, and the fixed pin 2 passes through the gap of the transmission chain 14. The weight adjustment motor 6 is also arranged on the tail end of the guide rail 5, and the weight adjustment motor 6 is connected with a threaded screw 8 by a belt 7, and the threaded screw 8 is connected with a movable suspension column 9, and the movable suspension column 9 is suspended on the side plate 12 through a pin shaft. There is also a fixed suspension column 10 on the side plate 12, and the fixed suspension column 10 is not connected with the threaded screw 8, and the fixed suspension column 10 is fixedly connected with the side plate 12. The transverse structural plate 11 is connected to the guide rail 5, the side plate 12 and the threaded screw 8 at the same time, wherein the threaded screw 8 is connected to the transverse structural plate 11 through a bearing, and the transverse structural plate 11 is fixedly connected with the guide rail 5 and the side plate 12. There are lifting holes on both the movable suspension column 9 and the fixed suspension column 10, and the lifting rope passes through the lifting holes when the crane (not shown in the figure) lifts.
[0027] The specific use method of the lifting core pulling machine with self-adjusting center of gravity of the present invention is as follows:
[0028] The hoisting personnel firstly places the present invention horizontally, sends the tooling to the workstation of the guide rail 5 of the present invention, and places it in front of the propulsion mechanism 1, passes the lifting rope through the lifting holes of the fixed lifting column 10 and the movable lifting column 9 for lifting, and starts the weight-adjusting motor 6. During lifting, the weight-adjusting motor 6 will automatically rotate forward or reverse in the air as the core-pulling machine swings as a whole, thereby driving the threaded screw 8 to rotate. The rotation of the threaded screw 8 will drive the movable lifting column 9 to swing back and forth, thereby adjusting the lifting position of the lifting rope, so that the overall center of gravity of the core-pulling machine remains stable, and the axial swing of the tooling in the air is avoided. After the present invention stably places the hoisted tooling at the predetermined installation position, the propulsion mechanism 1 can be remotely controlled to move forward to send the tooling to the predetermined workstation.
[0029] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
Claims
1. A self-adjusting center of gravity lifting core pulling machine, comprising two parallel guide rails (5), and a propulsion mechanism (1) arranged on the guide rails (5) and moving axially along the guide rails (5), a connecting body (13) arranged along the cross section is provided between the middle sections of the two guide rails (5), characterized in that: The tail end of the guide rail (5) is provided with a weight-adjusting motor (6) linked to the propulsion mechanism (1), and a level monitor is provided inside the weight-adjusting motor (6). The bottom of the front end of the guide rail (5) is provided with a transverse structural plate (11), and each guide rail (5) is provided with a side plate (12) parallel to the guide rail (5) on the outside. The front end of each side plate (12) is connected to the end corresponding to the transverse structural plate (11), and the tail end of each side plate (12) is connected to the end of the corresponding connector (13). A corresponding lifting mechanism is provided on the outside of the front end of each side plate (12), and a movable hanging column (9) in the shape of a "U" as a whole is provided on the outside of the tail ends of the two side plates (12). ), the two ends of the movable suspension column (9) are respectively hingedly connected to the outer sides of the corresponding side plates (12), and the tops of the two ends of the movable suspension column (9) are respectively provided with suspension holes, and the transverse structural plate (11), the bottom of the movable suspension column (9) and the bottom of the connecting body (13) are all provided with corresponding coaxial through holes, and a threaded screw (8) connected to the through holes, wherein the threaded screw (8) is connected to the through holes at the bottom of the connecting body (13) and the movable suspension column (9) through threads, the threaded screw (8) is connected to the through holes of the transverse structural plate (11) through bearings, and the power end of the weight adjustment motor (6) is connected to the threaded screw (8) through a belt (7).
2. The self-adjusting center of gravity lifting core pulling machine according to claim 1 is characterized in that: A transmission shaft (4) parallel to the guide rail (5) is provided between each guide rail (5) and its corresponding side plate (12); two ends of the transmission shaft (4) are respectively connected to the top surface of the connector (13) and the top surface of the transverse structural plate (11); multiple turns of transmission chains (14) are axially spaced apart on the transmission shaft (4); each of the transmission chains (14) is circumferentially arranged along the side wall of the transmission shaft (4); the propulsion mechanism (1) is provided with a drive motor with a power end facing the corresponding drive shaft (4); a drive gear (3) is provided at the power end of the drive motor; the drive gear (3) is meshed and connected with the multiple turns of transmission chains (14) to form a transmission pair; the transmission pair helps to convert the rotation of the transmission gear (3) into forward or backward movement of the propulsion mechanism (1) along the guide rail (5).
3. The self-adjusting center of gravity lifting core pulling machine according to claim 2 is characterized in that: A fixing pin (2) for keeping the adjacent transmission chains (14) spaced apart is provided at the bottom of the transmission shaft (4) between adjacent transmission chains (14).
4. The self-adjusting center of gravity lifting core pulling machine according to claim 3 is characterized in that: The lifting mechanism on the outer side of the front end of each side plate (12) is a fixed hanging column (10), and corresponding lifting holes are provided on the two fixed hanging columns (10).
5. The self-adjusting center of gravity lifting core pulling machine according to claim 4, characterized in that: The level monitor inside the weight-adjusting motor (6) is a gyroscope.
Citation Information
Patent Citations
Automatic leveling and adjusting lifting appliance and control method thereof
CN101704470A
Lifting device
CN208413627U