Anti-toppling transportation device for electrical panel cabinet

Abstract

The utility model belongs to transportation devices, and particularly relates to an anti-toppling transportation device for an electrical panel cabinet. The anti-toppling transportation device for the electrical panel cabinet comprises a bottom plate assembly arranged at the bottommost end, a supporting assembly is arranged on the bottom plate assembly, and a hoisting assembly is arranged on the supporting assembly. The method has the remarkable effects that (1) the plate cabinets do not shake in the transportation process and can be placed in place at a time, and the risk in the plate cabinet transferring and in-place process is greatly reduced; (2) by applying the device, the number of operators can be reduced, the labor intensity is reduced, and the labor efficiency is improved; tools such as rolling bars and crowbars are not needed in construction, the device is flexible and reliable to move and free of vibration, and construction quality is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the field of transportation devices, and particularly relates to an anti-tipping transportation device for electrical switchgear cabinets. Background Art

[0002] The installation of electrical switchgear cabinets is a key process in the electrical equipment installation project. Electrical switchgear cabinets are generally installed in the distribution room, and lifting tools such as cranes cannot be used for the transportation and positioning of equipment in the room. According to the current traditional construction technology, the transportation method generally uses rolling bars or hydraulic forklifts. This method has the following problems:

[0003] 1. Electrical switchgear cabinets generally have a high center of gravity and a small base area. During the construction process, the chassis shakes, and it is easy to have the situation of unstable center of gravity and tipping, with a low safety factor and unable to ensure the safety of operators;

[0004] 2. The instruments in the cabinet have high requirements for earthquake resistance. The cabinet foundation is required to be 3 - 5 cm higher than the ground. The large vibration during the equipment positioning process may cause damage to the instruments or components in the switchgear cabinet, increasing the operation hidden danger;

[0005] 3. When the switchgear cabinet enters the site, it is generally after the construction of the distribution room floor is completed. Rolling bars or crowbars are easy to damage the ground, which is not conducive to the finished products;

[0006] 4. The traditional construction method requires a large number of operators, with a large labor intensity and low construction efficiency.

[0007] The construction site has great limitations.

[0008] Therefore, a new anti-tipping transportation device for electrical switchgear cabinets is needed. Summary of the Invention

[0009] In view of the defects of the prior art, the present invention provides an anti-tipping transportation device for electrical switchgear cabinets.

[0010] The present invention is implemented as follows: An anti-tipping transportation device for electrical switchgear cabinets, including a bottom plate assembly arranged at the bottommost end, a support assembly arranged on the bottom plate assembly, and a lifting assembly arranged on the support assembly.

[0011] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein the bottom plate assembly includes a rectangular bottom plate, a chassis is arranged below the bottom plate, and wheels are arranged below the bottom plate.

[0012] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein the wheels include two directional wheels and two universal wheels.

[0013] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein the support assembly is arranged on one side of the bottom plate assembly and includes two parallel vertical telescopic sleeves and a horizontal telescopic sleeve arranged between the two vertical telescopic sleeves.

[0014] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein the two vertical telescopic sleeves are exactly the same and each includes a bottom telescopic sleeve and a top telescopic sleeve.

[0015] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein there are multiple horizontal telescopic sleeves. The lowermost horizontal telescopic sleeve is the lower telescopic sleeve, and the rest are upper telescopic sleeves.

[0016] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein the lifting assembly includes a boom arranged on the top telescopic sleeve. A reinforcing plate is arranged between the top telescopic sleeve and the boom. A hook is arranged at the end of the boom. The hook is connected to a manual hoisting device through a steel wire rope, and the manual hoisting device can control the lifting and lowering of the hook.

[0017] An anti-tipping transportation device for electrical switchgear cabinets as described above, wherein

[0018] The chassis is made of Q235B 80*80*8 square steel with a length of 1400 mm;

[0019] The bottom plate is used to fix the bottom of the switchgear cabinet during transportation;

[0020] Two 5-inch fixed wheels and swivel wheels are respectively installed under the chassis;

[0021] The material specification models of the bottom telescopic sleeve and the top telescopic sleeve are Q235B 80*80*8 square steel, and the lengths are 2000 mm and 700 mm respectively;

[0022] The width telescopic sleeves of the lower telescopic sleeve and the upper telescopic sleeves are made of Q235B 60*60*6 and 80*80*8 square steel, and the single root length is 600 mm. 6 mm thick steel plates are welded on the upper and lower sides of the 6# square steel to reduce the internal gap of the telescopic sleeve. Three holes are drilled on the outer square steel and welded with 8# screws to fix the telescopic sleeve;

[0023] The manual hoisting device uses a 6 mm diameter steel wire rope to connect with the hook;

[0024] The reinforcing plate is made of 10 mm thick steel plate;

[0025] The boom uses Q235B 60*60*6 square steel, and 6 mm thick steel plates are welded on the side after welding to strengthen;

[0026] The hook is equipped with a balance beam and is used for lifting the switchgear cabinet.

[0027] The remarkable effects of the present invention are as follows: (1) During transportation, the switchgear cabinets do not shake and can be placed in position at one time, greatly reducing the risks during the process of transporting and positioning the switchgear cabinets; (2) The application of this device can reduce the number of operators, lower the labor intensity, and improve the labor efficiency; (3) During construction, tools such as rolling bars and crowbars are not required. The device moves flexibly and reliably without vibration, ensuring the construction quality. Brief Description of the Drawings

[0028] Figure 1 Schematic structural diagram of an anti-tipping transportation device for electrical switchgear cabinets.

[0029] Figure 2 Schematic diagram of the force analysis of the device during construction.

[0030] In the figure: 1. Chassis, 2. Base plate, 3. Fixed-direction wheel, 4. Universal wheel, 5. Bottom telescopic sleeve, 6. Top telescopic sleeve, 7. Lower telescopic sleeve, 8. Upper telescopic sleeve, 9. Manual hoisting device, 10. Reinforcement plate, 11. Boom, 12. Hook. Detailed Description of the Invention

[0031] An anti-tipping transportation device for electrical switchgear cabinets includes the following devices

[0032] The chassis 1 is made of Q235B square steel with a size of 80*80*8 and a length of 1400 mm;

[0033] The base plate 2 is a base plate used to fix the bottom of the switchgear cabinet during transportation;

[0034] Two fixed-direction wheels 3 with a diameter of 5 inches and universal wheels 4 are respectively installed under the chassis;

[0035] The bottom telescopic sleeve 5 and the top telescopic sleeve 6 are made of Q235B square steel with a size of 80*80*8. The treatment and hole opening of the square steel are the same as above, and the lengths are 2000 mm and 700 mm respectively.

[0036] The width telescopic sleeves of the lower telescopic sleeve 7 and the upper telescopic sleeve 8 are made of Q235B square steel with sizes of 60*60*6 and 80*80*8. The single root length is 600 mm. 6-mm-thick steel plates are welded to the upper and lower sides of the 6# square steel to reduce the internal gap of the telescopic sleeve. Three holes are drilled in the outer square steel for welding and 8# screws are used to fix the telescopic sleeve

[0037] The manual hoisting device 9 uses a steel wire rope with a diameter of 6 mm;

[0038] The reinforcement plate 10 is made of a 10-mm-thick steel plate;

[0039] The boom 11 is made of Q235B square steel with a size of 60*60*6. After welding, 6-mm-thick steel plates are welded to the sides for reinforcement;

[0040] The lifting hook 12, attached with a balance beam, is used for lifting the switchgear cubicle.

[0041] The weld check is as follows

[0042] Force analysis of the device during the construction process Figure 2 As shown

[0043] Calculation of the rated load of the switchgear cubicle transfer tooling

[0044] Take one of the welds for calculation:

[0045] After measurement, the distance between the two ends of the weld is: L = 1100 mm;

[0046] The perimeter of the weld is approximately: l = 2×100 + 2×80 = 360 mm;

[0047] When the tooling transfers the switchgear cubicle, the most dangerous state is when the front wheels are suspended. At this time, the weld is subjected to a bending moment M. According to Figure 1 The schematic diagram of the tooling shows that the weld is a fillet weld connection. By referring to the "Steel Structure Design Manual", the strength calculation formula for fillet weld connection is as follows:

[0048]

[0049] In the formula,

[0050] β f —Design strength increase factor for fillet welds in the frontal plane, take β f = 1.22;

[0051] h f —Size of the weld leg;

[0052] l w —Calculated length of the fillet weld, for each weld, take its actual length minus 10 mm;

[0053] —Allowable strength value of the fillet weld, take

[0054] For this tooling, h f = 6 mm, l w = 350 mm. Substitute each data into the formula,

[0055]

[0056] It is obtained that:

[0057]

[0058] G ≤ 4.2×10 4 N

[0059] m ≤ 4.2 t

[0060] Take m = 4t.

[0061] Similarly, the rated load of the other corresponding weld is:

[0062] G ≤ 4.2×10 4 N

[0063] m ≤ 4.2t

[0064] Take m = 4t.

[0065] Therefore, when the fillet weld size is 6mm for the welded connection, this transfer tooling for switchgear cabinets can meet the transfer work of switchgear cabinets with a weight less than 8 tons.

[0066] After fabrication, dynamic load tests at 1.2 times the rated lifting capacity and static load tests at 1.5 times the rated lifting capacity are carried out, and both can meet the requirements.

[0067] The usage method of this device is generally as follows:

[0068] 1. Adjust the height and width of the device according to the dimensions of the installed switchgear cabinet;

[0069] 2. Lift the sling balance beam to the top and move the device to the electrical switchgear cabinet;

[0070] 3. Lower the balance beam and fix it reliably to the lifting point of the equipment;

[0071] 4. Lift the equipment and install a bottom plate at the bottom of the device;

[0072] 5. Lower the equipment so that the bottom plate and the sling are stressed simultaneously;

[0073] 6. Move the equipment to the top of the foundation, lift the equipment and remove the bottom plate;

[0074] 7. Lower the equipment directly onto the foundation, and the positioning is completed.

[0075] At present, the anti - tipping transportation device for electrical switchgear cabinets has been successfully applied to the installation construction of electrical switchgear cabinets in Unit 6 of Tianwan Nuclear Power Plant. Through practice, it is proved that using this device is safer, more reliable and more efficient than the original construction technology, and the expected effect has been achieved.

Claims

1. An anti-tipping transportation device for an electrical panel cabinet, characterized in that: It includes a bottom plate assembly arranged at the bottommost part, a support assembly arranged on the bottom plate assembly, and a hoisting assembly arranged on the support assembly. The bottom plate assembly includes a rectangular bottom plate (2), a chassis (1) is arranged below the bottom plate (2), and wheels are arranged below the chassis (1). The support assembly is arranged on one side of the bottom plate assembly and includes two parallel vertical telescopic sleeves and a horizontal telescopic sleeve arranged between the two vertical telescopic sleeves.

2. The anti-tipping transportation device for an electrical panel cabinet according to claim 1, wherein: The wheels include two fixed wheels (3) and two universal wheels (4).

3. The anti-tipping transportation device for an electrical panel cabinet according to claim 2, wherein: The two vertical telescopic sleeves are exactly the same and each includes a bottom telescopic sleeve (5) and a top telescopic sleeve (6).

4. The anti-tipping transportation device for an electrical panel cabinet according to claim 3, wherein: There are multiple horizontal telescopic sleeves. The lowermost horizontal telescopic sleeve is the lower telescopic sleeve (7), and the rest are upper telescopic sleeves (8).

5. The anti-tipping transportation device for an electrical panel cabinet according to claim 4, wherein: The hoisting assembly includes a boom (11) arranged on the top telescopic sleeve (6). A reinforcing plate (10) is arranged between the top telescopic sleeve (6) and the boom (11). A hook (12) is arranged at the end of the boom (11). The hook (12) is connected to a manual hoisting device (9) through a steel wire rope, and the manual hoisting device (9) can control the lifting and lowering of the hook (12).

6. An anti-tipping transportation device for an electrical switchgear cabinet according to claim 5, characterized in that: The chassis (1) is made of Q235B 80*80*8 square steel with a length of 1400 mm. The bottom plate (2) is used to fix the bottom of the switchgear cabinet during transportation. Two 5-inch fixed wheels (3) and universal wheels (4) are respectively installed below the chassis (1). The material specification model of the bottom telescopic sleeve (5) and the top telescopic sleeve (6) is Q235B 80*80*8 square steel, and the lengths are 2000 mm and 700 mm respectively. The width telescopic sleeves of the lower telescopic sleeve (7) and the upper telescopic sleeves (8) are made of Q235B 60*60*6 and 80*80*8 square steel, and the single root length is 600 mm. 6 mm thick steel plates are welded to the upper and lower sides of the 6# square steel to reduce the internal gap of the telescopic sleeve. Three holes are drilled in the outer square steel and welded with 8# screws to fix the telescopic sleeve. The manual hoisting device (9) is connected to the hook (12) with a 6 mm diameter steel wire rope. The reinforcing plate (10) is made of 10 mm thick steel plate. The boom (11) is made of Q235B 60*60*6 square steel. After welding, 6 mm thick steel plates are welded to the sides to strengthen. The hook (12) is equipped with a balance beam and is used for hoisting the switchgear cabinet.

Images