A special hanging beam and hanging system for bearing maintenance

Abstract

The present invention provides a special hanging beam and hoisting system for bearing bushing maintenance, which relates to the field of hoisting, including: a horizontally arranged main beam and a counterweight block group, wherein the main beam includes a beam body, and the beam body is provided with a main hanging point, an auxiliary hanging point, and a bearing cover hanging point, and the beam body is also provided with a counterweight block group. The present invention effectively improves the problem proposed in the background technology that the existing hanging beam calculates the hanging point according to the theoretical center of gravity of the component to be hoisted in order to ensure stability during the hoisting process, and there is a certain deviation between the actual center and the theoretical center of gravity, so that imbalance may occur during the hoisting process, and the stability requirement cannot be met. When the space above the hoisted component is narrow, the center hanging point and its hanging rope, the hook and the running rope above it cannot enter, and the use is limited.

Description

Technical Field

[0001] The invention relates to the field of hoisting, and in particular to a special hoisting beam and a hoisting system for bearing bush maintenance. Background Art

[0002] During the operation of the steam turbine generator set, the bearing, as an important component of the sliding bearing, its working state directly affects the stability and safety of the unit. In the prior art, the bearing under the connecting pipe usually needs to be hoisted with the special hoisting tools of the steam turbine manufacturing plant of Shanghai Electric Co., Ltd., but after the cylinder cutting and modification, the original special tools cannot be used. Therefore, the prior art solution sets a lifting point on the cylinder body or the connecting pipe (the current connecting pipe lifting point does not meet the safety requirements). When the lifting point set on the cylinder body is hoisted, it can only be moved up and down. If the hoisted object needs to be placed at the specified placement point, parallel movement cannot be achieved, and a crane is required.

[0003] In order to ensure stability during the lifting process, the existing lifting beam calculates the lifting point according to the theoretical center of gravity of the component to be lifted. There is a certain deviation between the actual center and the theoretical center of gravity, so imbalance may occur during the lifting process, and the stability requirement cannot be met. When the space above the component to be lifted is narrow, the center lifting point and its lifting rope, the hook and the running rope above it cannot enter, and the use is limited. Therefore, in view of the above situation, it is urgent to develop a special lifting beam and lifting system for bearing maintenance to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides a special lifting beam and lifting system for bearing maintenance, which are used to solve the technical problems raised by the above-mentioned background technology: in order to ensure stability during lifting, the existing lifting beam calculates the lifting point according to the theoretical center of gravity of the component to be lifted, and there is a certain deviation between the actual center and the theoretical center of gravity. Therefore, imbalance may occur during the lifting process and the stability requirement cannot be met. When the space above the lifted component is narrow, the central lifting point and its lifting rope, the hook and the running rope above it cannot enter, and the use is limited.

[0005] In order to solve the above technical problems, the present invention discloses a special hanging beam for bearing bush maintenance.

[0006] The utility model comprises: a main beam and a counterweight block group arranged horizontally, wherein the main beam comprises a beam body, the beam body is provided with a main hanging point, an auxiliary hanging point and a bearing cover hanging point, and the beam body is also provided with a counterweight block group.

[0007] Preferably, a bearing cover hanging point is arranged at the front section of the beam body, a main hanging point is arranged at the middle section of the beam body, and a plurality of hanging holes are arranged on the main hanging point.

[0008] Preferably, the auxiliary lifting point is arranged at the tail end of the beam body, and an auxiliary lifting point hole is provided on the auxiliary lifting point, the auxiliary lifting point hole is connected to the main lifting point through a wire rope, and the wire rope is hoisted on the main lifting point lifting equipment through the hook at the bottom end of the hand winch.

[0009] Preferably, a top locking block installation hole is provided on the main beam, and a counterweight block group is installed in the top locking block installation hole, and the counterweight block group is an adjustable structure.

[0010] Preferably, the counterweight block group is composed of a plurality of counterweight blocks, and a tightening screw hole is provided at the top of the counterweight block, and the counterweight block is fixedly connected to the main beam and the tightening screw hole by bolts, and lifting handles are fixedly installed on both sides of a single counterweight block, and limit blocks are fixedly installed at both ends of the counterweight block group on the main beam.

[0011] Preferably, the beam body is a horizontally arranged suspension beam I-beam.

[0012] Preferably, the steel wire rope further comprises:

[0013] Angle sensor, used to detect the angle between the wire rope and the beam;

[0014] A controller and an alarm, wherein the controller is electrically connected to the angle sensor and the alarm.

[0015] Preferably, a special hanging beam for bearing bushing maintenance, wherein the controller controls the alarm to work based on the angle sensor, comprises the following steps:

[0016] Step 1: Calculate the dynamic load coefficient K of the wire rope according to formula (1) and the angle sensor detection value:

[0017]

[0018] Where h is the distance that the wire rope hoists the object upward, E is the elastic modulus of the wire rope, S is the cross-sectional area of ​​the wire rope, G is the weight of the object to be hoisted at the bottom of the wire rope, g is the acceleration of gravity, λ is the motion resistance coefficient during the hoisting process of the wire rope, L is the total length of the wire rope, α is the angle sensor detection value, sin is sine, and cos is cosine;

[0019] Step 2: According to the following formula (2), the minimum breaking force F of the wire rope is calculated. The controller compares the minimum breaking force F of the wire rope with the preset minimum breaking force range. When the actual minimum breaking force exceeds the preset minimum breaking force range, the controller controls the alarm to sound an alarm:

[0020]

[0021] Where μ is the minimum breaking tension coefficient of the wire rope, R is the nominal diameter of the wire rope, and C is the nominal tensile strength of the wire rope.

[0022] A lifting system, comprising:

[0023] The crane assembly includes a plurality of liftable booms, the booms are connected to a driving device to provide lifting power, and the ends of the booms are connected to the main beam through a hook at the bottom of a hand chain hoist;

[0024] An intelligent control module integrates a control unit, a sensor group and a human-machine interface. The control unit automatically adjusts the operating state of the crane according to the data collected by the sensor group and displays the lifting parameters through the human-machine interface;

[0025] A safety protection module, the safety protection module includes: an overload protection device, a limit protection device and an emergency brake device. The overload protection device automatically stops the crane operation when it detects that the lifting weight exceeds a preset value. The limit protection device prevents the crane from exceeding a set working range. The emergency brake device immediately stops all moving parts upon receiving an emergency stop signal.

[0026] A remote monitoring module is connected to the intelligent control module and is used to monitor the lifting operation status in real time and remotely control the operation of the lifting system.

[0027] Preferably, the sensor group includes: a weight sensor, a height sensor, a tension sensor and a wind speed sensor, which are respectively used to measure the weight of the object to be hoisted, the rising height of the object to be hoisted, the tension of the wire rope and the wind speed at the work site, and transmit these data to the control unit in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A structural front view provided for an embodiment of the present invention;

[0030] Figure 2 For the present invention Figure 1 The left side view of the installation provided in the embodiment.

[0031] Reference numerals:

[0032] 1. Main beam; 2. Main lifting point; 3. Auxiliary lifting point; 4. Bearing cover lifting point; 5. Lifting hole; 6. Auxiliary lifting point hole; 7. Wire rope; 8. Hook; 9. Counterweight; 10. Lifting handle; 11. Limit block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention provides the following embodiments

[0036] Example 1

[0037] The embodiment of the present invention provides a special hanging beam for bearing bushing maintenance, such as Figure 1-2 As shown, a special hanging beam for bearing maintenance includes: a horizontally arranged main beam 1 and a counterweight block group, the main beam 1 includes a beam body, the beam body is provided with a main hanging point 2, an auxiliary hanging point 3, and a bearing cover hanging point 4, and the beam body is also provided with a counterweight block group.

[0038] Optionally, a bearing cover hanging point 4 is provided at the front section of the beam body, a main hanging point 2 is provided at the middle section of the beam body, and a plurality of hanging holes 5 are provided on the main hanging point 2.

[0039] Optionally, the auxiliary lifting point 3 is arranged at the tail end of the beam body, and an auxiliary lifting point hole 6 is provided on the auxiliary lifting point 3. The auxiliary lifting point hole 6 is connected to the main lifting point 2 through a wire rope 7, and the wire rope 7 is hoisted on the main lifting point lifting equipment through a hook 8 at the bottom end of a hand winch.

[0040] Optionally, a top locking block installation hole is provided on the main beam 1, and a counterweight block group is installed in the top locking block installation hole, and the counterweight block group is an adjustable structure.

[0041] Optionally, the counterweight block group is composed of a plurality of counterweight blocks 9, and a tightening screw hole is provided at the top of the counterweight block 9, and the counterweight block 9 is fixedly connected to the main beam 1 and the tightening screw hole by bolts, and lifting handles 10 are fixedly installed on both sides of a single counterweight block 9, and limit blocks 11 are fixedly installed at both ends of the counterweight block group on the main beam 1.

[0042] Optionally, the beam body is a horizontally arranged hanging beam I-beam.

[0043] The working principle of the above technical solution is: install a locking block and lock a number of counterweight blocks 9 in the top locking block installation channel by tightening them with bolts, and then use a wire rope 7 to string them on the lifting point hole 5 set on the main lifting point 2 of the main beam 1. The other end of the wire rope 7 is hooked on the auxiliary lifting point hole 6 at the tail end of the lifting beam through the hook 8 of the hand winch. The horizontal angle of the main beam 1 is adjusted by adjusting the hand winch. After the main beam 1 adjusts to the horizontal state, it is moved to the top of the bearing to prepare for operation. When lifting the object, adjust the length of the hand winch and adjust the horizontal angle of the main beam 1. After the object is transported to the appropriate position, slowly drop the hook 8 until the object and the counterweight block touch the ground. If the main beam 1 is skewed during the lowering of the hook 8, the main beam 1 can be adjusted to a level by adjusting the length of the hand winch.

[0044] The beneficial effects of the above technical solution are:

[0045] 1. The maintenance and hoisting includes the upper cover, upper bushing, lower bushing, etc. of the bearing box. According to the different hoisting weights of different bearing bushes, the present invention can be realized by changing the special matching block;

[0046] 2. The maintenance process quality of the turbine bearing is relatively high. Usually, a small hook is required to lift the bearing, and an experienced crane driver is required. The patent of this invention can adjust the auxiliary lifting point 3 to connect the hand chain hoist for micro-adjustment, which greatly reduces the difficulty of maintenance;

[0047] 3. When the space above the bearing is narrow or there are large obstacles, it is impossible to use a crane or a crane to achieve direct operation. The use of the patented invention can solve this problem and improve the safety and reliability of the operation;

[0048] 4. The patent of the present invention has precise positioning and is convenient for handling and storage. It solves the problem that the overall outline of the original C-type bearing lifting tool for bearing maintenance is too large, which is inconvenient to lift and transport. It effectively improves the problem raised in the background technology: in order to ensure stability during lifting, the existing lifting beam calculates the lifting point according to the theoretical center of gravity of the component to be lifted. There is a certain deviation between the actual center and the theoretical center of gravity. Therefore, imbalance may occur during the lifting process and the stability requirement cannot be met. When the space above the lifted component is narrow, the center lifting point and its lifting rope, the hook and the running rope above it cannot enter, and the use is limited.

[0049] Example 2

[0050] On the basis of Example 1, a special hanging beam for bearing bush maintenance, the steel wire rope 7 further comprises:

[0051] An angle sensor, used for detecting an angle sensor detection value;

[0052] A controller and an alarm, wherein the controller is electrically connected to the angle sensor and the alarm.

[0053] Optionally, in the special hanging beam for bearing bush maintenance, the controller controls the alarm to work based on the angle sensor, comprising the following steps:

[0054] Step 1: Calculate the dynamic load coefficient K of the wire rope 7 according to formula (1) and the angle sensor detection value:

[0055]

[0056] Wherein h is the distance of the object hoisted upward by the steel wire rope 7, E is the elastic modulus of the steel wire rope 7, S is the cross-sectional area of ​​the steel wire rope 7, G is the weight of the object to be hoisted at the bottom of the steel wire rope 7, g is the acceleration of gravity, λ is the motion resistance coefficient of the steel wire rope 7 during the hoisting process (the range of values ​​is 0.01-0.015), L is the total length of the steel wire rope 7, α is the angle sensor detection value, sin is sine, and cos is cosine;

[0057] Step 2: According to the following formula (2), the minimum breaking force F of the wire rope 7 is calculated. The controller compares the minimum breaking force F of the wire rope 7 with the preset minimum breaking force range. When the actual minimum breaking force exceeds the preset minimum breaking force range, the controller controls the alarm to sound an alarm:

[0058]

[0059] Wherein μ is the minimum breaking tension coefficient of the steel wire rope 7 (value range is 0.25-0.46), R is the nominal diameter of the steel wire rope 7, and C is the nominal tensile strength of the steel wire rope 7.

[0060] The beneficial effects of the above technical solution are as follows: the controller calculates the dynamic load coefficient of the wire rope 7 based on the formula (1) and the angle sensor detection value, and comprehensively considers the distance of the wire rope 7 to hoist the object upward, the elastic modulus of the wire rope 7, the cross-sectional area of ​​the wire rope 7, the weight of the object to be hoisted at the bottom of the wire rope 7, the gravitational acceleration, the motion resistance coefficient of the wire rope 7 during the hoisting process, and the total length of the wire rope 7, so that the calculation result is more accurate and reliable;

[0061] Then, according to the formula (2), the minimum breaking tension coefficient of the steel wire rope 7, the nominal diameter of the steel wire rope 7, and the nominal tensile strength of the steel wire rope 7, the minimum breaking tension of the steel wire rope 7 is calculated, so that the calculation result is more accurate and reliable;

[0062] The controller compares the minimum breaking force of the steel wire rope 7 with the preset minimum breaking force range. When the actual minimum breaking force exceeds the preset minimum breaking force range, the controller controls the alarm to sound an alarm, thereby reminding the staff to inspect or replace the steel wire rope 7 in time, thereby meeting the user's demand for a special hanging beam for bearing maintenance.

[0063] Example 3

[0064] Based on Embodiment 1-2, a hoisting system includes:

[0065] The crane assembly includes a plurality of liftable booms, the booms are connected to a driving device to provide lifting power, and the ends of the booms are connected to the main beam 1 through a hook 8 at the bottom of a hand chain hoist;

[0066] An intelligent control module integrates a control unit, a sensor group and a human-machine interface. The control unit automatically adjusts the operating state of the crane according to the data collected by the sensor group and displays the lifting parameters through the human-machine interface;

[0067] A safety protection module, the safety protection module includes: an overload protection device, a limit protection device and an emergency brake device. The overload protection device automatically stops the crane operation when it detects that the lifting weight exceeds a preset value. The limit protection device prevents the crane from exceeding a set working range. The emergency brake device immediately stops all moving parts upon receiving an emergency stop signal.

[0068] A remote monitoring module is connected to the intelligent control module and is used to monitor the lifting operation status in real time and remotely control the operation of the lifting system.

[0069] Optionally, the sensor group includes: a weight sensor, a height sensor, a tension sensor and a wind speed sensor, which are used to measure the weight of the object to be hoisted, the rising height of the object to be hoisted, the tension of the wire rope 7 and the wind speed at the work site, and transmit these data to the control unit in real time.

[0070] The beneficial effects of the above technical solution are as follows: by setting up an intelligent control module, the system can automatically adjust the operating status of the crane, reducing the complexity and time cost of manual operation; by setting up a sensor group, the real-time data monitoring of the sensor group makes the lifting operation more accurate, avoiding the inefficiency caused by misoperation or information asymmetry; the remote monitoring module allows the operator to monitor and control away from the work site, improving the response speed and operation continuity; the remote monitoring and intelligent control functions reduce the need for manual intervention and reduce labor costs; the overload protection device, limit protection device and emergency brake device in the safety protection module together constitute a complete safety protection system, which effectively prevents safety accidents caused by overloading, over-limit or emergencies; the sensor group monitors various parameters in the lifting process in real time, such as weight, The volume, height, tension and wind speed provide the operator with comprehensive safety information, which helps to promptly discover and deal with potential safety hazards; the human-machine interface clearly displays the lifting parameters, allowing the operator to grasp the overall situation of the lifting operation at any time and make correct judgments and decisions; the intelligent control module realizes precise control of the lifting operation through the integrated control unit and sensor group, thereby improving the reliability and stability of the operation; the system supports multiple operation modes and parameter settings, and can be customized according to different lifting requirements, thereby improving the adaptability and flexibility of the operation and reducing operating costs; by improving operating efficiency and safety, the system reduces downtime and maintenance costs caused by accidents or misoperation; the integrated use of the sensor group and the intelligent control module improves the overall performance and reliability of the system and extends the service life of the equipment.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A special hanging beam for bearing bushing maintenance, characterized in that: include: A main beam (1) and a counterweight block group are arranged horizontally, wherein the main beam (1) comprises a beam body, the beam body is provided with a main hanging point (2), an auxiliary hanging point (3), and a bearing cover hanging point (4), and the beam body is also provided with a counterweight block group.

2. A special hanging beam for bearing bushing maintenance according to claim 1, characterized in that: A bearing cover hanging point (4) is arranged at the front section of the beam body, a main hanging point (2) is arranged at the middle section of the beam body, and a plurality of hanging holes (5) are arranged on the main hanging point (2).

3. A special hanging beam for bearing bush maintenance according to claim 1, characterized in that: The auxiliary lifting point (3) is arranged at the rear end of the beam body, and an auxiliary lifting point hole (6) is provided on the auxiliary lifting point (3). The auxiliary lifting point hole (6) is connected to the main lifting point (2) through a steel wire rope (7), and the steel wire rope (7) is hoisted on the main lifting point lifting equipment through a hook (8) at the bottom end of a hand winch.

4. A special hanging beam for bearing bush maintenance according to claim 1, characterized in that: A top locking block installation hole is provided on the main beam (1), and a counterweight block group is installed in the top locking block installation hole, and the counterweight block group is an adjustable structure.

5. A special hanging beam for bearing bush maintenance according to claim 4, characterized in that: The counterweight block group is composed of a plurality of counterweight blocks (9), and a tightening screw hole is provided at the top of each counterweight block (9), and the counterweight block (9) is fixedly connected to the main beam (1) and the tightening screw hole by bolts, and lifting handles (10) are fixedly installed on both sides of a single counterweight block (9), and limit blocks (11) are fixedly installed at both ends of the counterweight block group on the main beam (1).

6. A special hanging beam for bearing bush maintenance according to claim 1, characterized in that: The beam body is a horizontally arranged hanging beam I-shaped steel.

7. The special hanging beam for bearing bush maintenance according to claim 3, characterized in that: Also includes: An angle sensor, used for detecting the angle between the steel wire rope (7) and the beam body; A controller and an alarm, wherein the controller is electrically connected to the angle sensor and the alarm.

8. A special hanging beam for bearing bushing maintenance according to claim 7, characterized in that: The controller controls the alarm to work based on the angle sensor, comprising the following steps: Step 1: Calculate the dynamic load coefficient K of the wire rope (7) according to formula (1) and the angle sensor detection value: Wherein h is the distance of the object hoisted upward by the steel wire rope (7), E is the elastic modulus of the steel wire rope (7), S is the cross-sectional area of ​​the steel wire rope (7), G is the weight of the object to be hoisted at the bottom of the steel wire rope (7), g is the gravitational acceleration, λ is the motion resistance coefficient of the steel wire rope (7) during the hoisting process, L is the total length of the steel wire rope (7), α is the angle between the steel wire rope (7) and the beam, sin is sine, and cos is cosine; Step 2: According to the following formula (2), the minimum breaking force F of the steel wire rope (7) is calculated. The controller compares the minimum breaking force F of the steel wire rope (7) with the preset minimum breaking force range. When the actual minimum breaking force exceeds the preset minimum breaking force range, the controller controls the alarm to sound an alarm: Wherein μ is the minimum breaking tension coefficient of the steel wire rope (7), R is the nominal diameter of the steel wire rope (7), and C is the nominal tensile strength of the steel wire rope (7).

9. A hoisting system, characterized in that: The lifting system comprises a special hanging beam for bearing bush maintenance as claimed in any one of claims 1 to 8, and the hanging system further comprises: The crane assembly comprises a plurality of liftable booms, wherein the booms are connected to a driving device to provide lifting power, and the ends of the booms are connected to a main beam (1) via a hook (8) at the bottom of a hand chain hoist; An intelligent control module integrates a control unit, a sensor group and a human-machine interface. The control unit automatically adjusts the operating state of the crane according to the data collected by the sensor group and displays the lifting parameters through the human-machine interface; A safety protection module, the safety protection module includes: an overload protection device, a limit protection device and an emergency brake device. The overload protection device automatically stops the crane operation when it detects that the lifting weight exceeds a preset value. The limit protection device prevents the crane from exceeding a set working range. The emergency brake device immediately stops all moving parts upon receiving an emergency stop signal. A remote monitoring module is connected to the intelligent control module and is used to monitor the lifting operation status in real time and remotely control the operation of the lifting system.

10. A hoisting system according to claim 9, characterized in that: The sensor group comprises: a weight sensor, a height sensor, a tension sensor and a wind speed sensor, which are respectively used to measure the weight of the object to be hoisted, the height of the object to be hoisted, the tension of the wire rope (7) and the wind speed at the work site, and transmit these data to the control unit in real time.

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