CN204529216U - A kind of hand-operated lifting platform - Google Patents

Abstract

The utility model discloses a manual elevating platform. The main point of the technical scheme is to include a bottom frame, a worktable parallel to the bottom frame is arranged above the bottom frame, and a lifting device and a driving device are arranged between the worktable and the bottom frame. The lifting device is a hydraulic drive device for rising and falling. The lifting device includes two sets of parallel upper inner rods, upper outer rods, lower inner rods and lower outer rods. The lower ends of the lower inner rods and lower outer rods are respectively hinged on the chassis. The upper end of the lower inner rod is hinged with the lower end of the upper outer rod, the upper end of the lower outer rod is hinged with the lower end of the upper inner rod, and the upper ends of the upper inner rod and the upper outer rod are respectively hinged on the bottom surface of the workbench. There is a first connecting rod between the lower inner rods, and a second connecting rod between two parallel upper outer rods. The hydraulic drive device includes a manual pump and a control box on the bottom frame. A hydraulic cylinder for driving the lifting device to rise is arranged between the rod and the second connecting rod. The utility model is simple in structure, light and practical.

Description

A manual lift

【Technical field】

The utility model relates to a tool for construction and maintenance of electrical equipment, in particular to a manual hydraulic lifting platform.

【Background technique】

The transformer generates heat due to copper loss and iron loss during operation, and its temperature rise directly affects the life, mechanical strength, load capacity and service life of the transformer insulation material. In order to reduce temperature rise, improve load capacity and transformer operation economy, large transformers have a complete cooling system. The transformer cooling system is generally composed of controllers, cooling fans, submersible pumps and other main devices. According to the operating temperature of the transformer or the load level, the switching on and off of the cooling fan and the submersible pump is adjusted, so that the operating temperature of the transformer is controlled within a safe range. Once the cooling system of the transformer breaks down, it will reduce the load to run, and it will threaten the safe operation of the transformer. At present, replacing a large cooling fan with the existing maintenance methods usually requires 8-10 people/day, which is time-consuming and labor-intensive, and the operation safety risk is high.

Due to the existence of oil suction and fire protection systems around the transformer, the ground is uneven and the space is small. The existing maintenance methods mainly rely on manpower to lift and lift the cooling fan to move out of the small space around the transformer. Replacing a large cooling fan often requires the cooperation of several young adults without technical skills.

The utility model is made based on this situation.

【Content of utility model】

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a manual lifting platform that greatly shortens the maintenance time of electrical equipment, enables the transformer to quickly restore the original load capacity, thereby improving work efficiency, reducing operation risks, and ensuring safe and stable operation of the transformer. .

The utility model is achieved through the following technical solutions:

A manual lifting platform is characterized in that: it includes an underframe 1, a workbench 2 parallel to the underframe 1 is arranged above the underframe 1, and a workbench 2 is arranged between the workbench 2 and the underframe 1 There is a lifting device and a hydraulic drive device for driving the lifting device to rise and fall. The lifting device includes two groups of parallel upper inner rods 3, upper outer rods 4, lower inner rods 5 and lower outer rods 6. The lower ends of the lower inner rod 5 and the lower outer rod 6 are respectively hinged on the chassis 1, the upper end of the lower inner rod 5 is hinged with the lower end of the upper outer rod 4, and the lower end of the lower outer rod 6 The upper end is hinged with the lower end of the upper inner rod 3, and the upper ends of the upper inner rod 3 and the upper outer rod 4 are respectively hinged on the bottom surface of the workbench 2, between two parallel lower inner rods 5 A first connecting rod 7 is arranged between them, a second connecting rod 8 is arranged between two parallel upper and outer rods 4, and the hydraulic drive device includes a hand pump 9 and a control box 10 arranged on the chassis 1 , A hydraulic cylinder 11 for driving the lifting device to rise is provided between the first connecting rod 7 and the second connecting rod 8 .

The above-mentioned manual lifting platform is characterized in that: the cylinder body of the hydraulic cylinder 11 is hinged on the first connecting rod 7, the piston rod of the hydraulic cylinder 11 is hinged on the second connecting rod 8, A hydraulic lock is also installed on the hydraulic cylinder 11 .

The above-mentioned manual lifting platform is characterized in that: the underframe 1 is surrounded by four beams to form a rectangle, inside the two parallel beams of the underframe 1, there are inner boards 12, and the two underframes 1 The inner rods 5 are respectively hinged on the said inner boards 12 through pin shafts.

The above-mentioned manual lifting platform is characterized in that: the base frame 1 is provided with two scissors fixing ears 13, and the lower outer rod 6 is hinged to the base frame through the scissors fixing ears 13. 1 on.

The above-mentioned manual lifting platform is characterized in that two support plates 16 are fixed on the bottom surface of the workbench 2, and the two upper and outer rods 4 are respectively hinged and fixed on the support plates 16. The upper end of the upper outer rod 4 is also connected with a third connecting rod 14 , and the upper end of the upper inner rod 3 is also hinged on the bottom surface of the workbench 2 through the scissors fixing ear 13 .

The above-mentioned manual lifting platform is characterized in that: the manual pump 9 is a foot pump.

The above-mentioned manual lifting platform is characterized in that: the bottom of the chassis 1 is provided with four rollers 18 for walking.

The above-mentioned manual lifting platform is characterized in that: the base frame 1 is also provided with a hand lever 19 to push the manual lifting platform to walk.

The above-mentioned manual lifting platform is characterized in that: a fourth connecting rod 15 is connected between the two parallel upper inner rods 3 .

The above-mentioned manual lifting platform is characterized in that: the manual lifting platform also includes a support frame arranged at the bottom, and the support frame includes four sets of hinged at the four corners of the bottom frame 1 so as to be able to rotate 270 degrees. A support assembly 17, the support assembly 17 includes a support arm 1701 hinged at one end to the chassis 1, the other end of the support arm 1701 is provided with a threaded hole and a support screw 1702 is provided through the threaded hole, the support screw The upper end of 1702 is provided with a lever 1703 that can be rotated to adjust the telescopic length of the support screw 1702 , and the lower end is provided with a support plate 1704 pressed on the ground.

Compared with the prior art, the utility model has the following advantages:

1. The lifting device of the present utility model is a simple linkage mechanism, which is lifted by a simple and portable hydraulic drive device, which is convenient for the maintenance team to carry to the work site; it is convenient to enter and exit on the cobblestone ground around the transformer; it can rise To the installation height of the cooling fan, it can be lowered to a lower height for easy movement; it can support a 500kV cooling fan more than enough.

2. The manual lifting table of the utility model quickly lowers the transformer fan and moves it to an open place for maintenance, which can reduce the construction period to 4 people*half a day, greatly shorten the maintenance time, and make the transformer quickly restore the original load capacity, thereby improving work efficiency. Reduce operational risks and ensure safe and stable operation of transformers.

3. The manual lifting platform of this utility model has the function of moving on flat ground, and can be pushed or dragged manually. The rollers are made of PU wheels, which have high bearing capacity, good wear resistance and are durable.

4. The manual lifting platform of the utility model installs a hydraulic control check valve and a throttle valve in the hydraulic circuit, so that the lifting speed of the worktable can be controlled, and the oil cannot return, which ensures the safety of the lifting.

【Description of drawings】

Fig. 1 is a perspective view 1 of the utility model;

Fig. 2 is a perspective view 2 of the utility model;

Fig. 3 is a plan view of the utility model;

Fig. 4 is the hydraulic principle diagram of the utility model.

In the figure: 1 is the bottom frame; 2 is the workbench; 3 is the upper inner rod; 4 is the upper outer rod; 5 is the lower inner rod; 6 is the lower outer rod; 7 is the first connecting rod; 8 is the second connecting rod ; 9 is a manual pump; 10 is a control box; 11 is a hydraulic cylinder; 12 is an inner plate; 13 is a scissors fixed ear; 14 is a third connecting rod; 15 is a fourth connecting rod; 16 is a support plate; 17 is a support Components; 1701 is a support arm; 1702 is a support screw; 1703 is a lever; 1704 is a support plate; 18 is a roller; 19 is a hand lever; 20 is a hydraulic pipeline; 21 is an oil tank; 22 is a three-position four-way reversing valve ; 23 is a throttle valve; 24 is a hydraulic control check valve.

【Detailed ways】

The technical features of the utility model will be described in further detail below in conjunction with the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

A manual elevating platform, comprising an underframe 1, a workbench 2 parallel to the underframe 1 is arranged above the underframe 1, and a lift is provided between the workbench 2 and the underframe 1 device and the hydraulic drive device that drives the lifting device to rise and fall, the lifting device includes two groups of parallel upper inner rods 3, upper outer rods 4, lower inner rods 5 and lower outer rods 6, the lower inner rods 5 and the lower ends of the lower outer rods 6 are respectively hinged on the chassis 1, the upper ends of the lower inner rods 5 are hinged with the lower ends of the upper outer rods 4, and the upper ends of the lower outer rods 6 are connected to the The lower ends of the upper inner rods 3 are hinged, the upper ends of the upper inner rods 3 and the upper outer rods 4 are respectively hinged on the bottom surface of the workbench 2, and a second inner rod 5 is arranged between the two parallel lower inner rods 5. A connecting rod 7, a second connecting rod 8 is provided between two parallel upper and outer rods 4, the hydraulic drive device includes a manual pump 9 and a control box 10 arranged on the chassis 1, in the A hydraulic cylinder 11 for driving the lifting device to rise is provided between the first connecting rod 7 and the second connecting rod 8, and an oil tank 21 connected with the manual pump 9 through a hydraulic pipeline 20 is also provided on the underframe 1 , the manual pump 9 is a foot pump, as shown in Figure 1.

The cylinder body of the hydraulic cylinder 11 is hinged on the first connecting rod 7, and the piston rod of the hydraulic cylinder 11 is hinged on the second connecting rod 8. By pressurizing the hydraulic cylinder 11, its piston rod will Push the second connecting rod 8 to rise up, and the hydraulic cylinder 11 is also equipped with a hydraulic lock, and the hydraulic lock is composed of two hydraulically controlled one-way valves 24 on the hydraulic circuit.

The underframe 1 is surrounded by four beams to form a rectangle, inside the two parallel beams of the underframe 1 are provided with inner boards 12, and the two lower inner rods 5 are respectively hinged on the said underframe 1 through pin shafts. on the inner panel 12.

The base frame 1 is provided with two scissor fixing ears 13 , and the lower outer rod 6 is hinged on the base frame 1 through the scissor fixing ears 13 .

Two support plates 16 are fixed on the bottom surface of the workbench 2, and the two upper outer rods 4 are respectively hinged and fixed on the support plates 16, and the upper ends of the two upper outer rods 4 are also connected with the first Three connecting rods 14, the upper end of the upper inner rod 3 is also hinged on the bottom surface of the workbench 2 through the scissors fixed ear 13, a fourth connecting rod 15 is connected between the two parallel upper inner rods 3 , Plays the role of stabilizing the entire lifting device.

The bottom of the underframe 1 is provided with four rollers 18 for walking, and the rollers 18 are universal wheels, using PU wheels, with high bearing capacity, good wear resistance and durability.

The underframe 1 is also provided with a hand lever 19 to push the manual lifting platform to walk.

The manual lifting platform also includes a support frame at the bottom, and the support frame includes four sets of support assemblies 17 that are hinged at the four corners of the chassis 1 so as to be able to rotate 270 degrees. The support assemblies 17 include one end connected to The hinged support arm 1701 of the chassis 1, the other end of the support arm 1701 is provided with a threaded hole and a support screw 1702 is provided through the threaded hole, and the upper end of the support screw 1702 is provided with a screw to adjust the support screw through rotation. The driving lever 1703 of 1702 telescopic lengths, the lower end is provided with the supporting plate 1704 that is pressed on the ground. The supporting screw 1702 is a heavy-duty screw, and the driving rod 1703 is rotated according to different terrains, so that each supporting screw 1702 has different lengths under the supporting arm 1701, so that the lifting platform can work on uneven bottom surfaces such as cobblestones around the transformer .

The hydraulic working principle diagram of the lifting platform is shown in Figure 4. After the three-position four-way reversing valve 22 is opened, the fuel tank 10 is pressurized by the manual pump 9, passes through the filter and the throttle valve 23, and enters from the cylinder end of the hydraulic cylinder 11. , the piston rod stretches out and pushes the second connecting rod 8 to rise upwards. Because there is a mutual connection and fixed relationship between the rods of the lifting device, the entire lifting device and the workbench 2 are pushed up. When it is necessary to lift the raised work The platform 2 is lowered, and the input end of the three-position four-way reversing valve 22 is changed, so that the high-speed oil is input from the piston rod end of the hydraulic cylinder 11, and the high-speed oil pushes the piston rod to retract into the cylinder, so that the entire lifting device can Down, the flow rate of the oil is controlled by the throttle valve 23 in the regulating circuit, so as to control the rising and falling speed of the lifting device. Two hydraulic control check valves 24 prevent the oil from flowing backwards, which provides a safety guarantee for the device. The control buttons are all arranged in the control box 10, and the operation is simple and convenient. The workbench in the present embodiment can rise to a height of 2 meters from the original height of 0.65 meters.

When working, drive the retracted manual lifting platform to the right below the fan to be overhauled, unfold the four support arms, tighten the energy release button of the oil cylinder, use the foot pump until it withstands the cooling fan, and then remove the cooling fan fixing screw , release the energy release button of the oil cylinder, the height of the maintenance platform is lowered to 0.65 meters, and the maintenance platform and the cooling fan are passed through the cobblestone ground of the main transformer site together, and the fan is repaired in the open passage.

The utility model has been described in detail above in conjunction with the embodiments of the accompanying drawings, and those skilled in the art can make various changes to the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the utility model, and the utility model shall take the scope defined by the appended claims as the protection scope of the utility model.

Claims (10)

1. a hand-operated lifting platform, it is characterized in that: include underframe (1), the bench board (2) parallel with described underframe (1) is provided with in described underframe (1) top, the fluid pressure drive device being provided with jacking system and driving this jacking system to rise and decline between described bench board (2) and described underframe (1), described jacking system comprises two groups of parallel upper interior bars (3), upper outside bar (4), bar (5) and lower outside bar (6) in lower, the lower end of described lower interior bar (5) and described lower outside bar (6) is hinged on described underframe (1) respectively, the upper end of described lower interior bar (5) and the lower end of described upper outside bar (4) hinged, the upper end of described lower outside bar (6) and the lower end of described upper interior bar (3) hinged, the upper end of described interior bar (3) and described upper outside bar (4) is hinged on the bottom surface of described bench board (2) respectively, first connecting rod (7) is provided with between two parallel lower interior bars (5), second connecting rod (8) is provided with between two parallel upper outside bars (4), described fluid pressure drive device comprises and is located at manual pump (9) on described underframe (1) and control box (10), the hydraulic actuating cylinder (11) for driving described jacking system to rise is provided with between described first connecting rod (7) and second connecting rod (8).

2. hand-operated lifting platform according to claim 1, it is characterized in that: the cylinder body of described hydraulic actuating cylinder (11) is hinged on described first connecting rod (7), the piston rod of described hydraulic actuating cylinder (11) is hinged on described second connecting rod (8), and (11) are also equipped with hydraulic lock to described hydraulic actuating cylinder.

3. hand-operated lifting platform according to claim 2, it is characterized in that: described underframe (1) surrounds rectangle by four beams, inside two beams that described underframe (1) is parallel, be provided with interior plate (12), the lower interior bar (5) described in two is hinged on described interior plate (12) respectively by bearing pin.

4. hand-operated lifting platform according to claim 3, it is characterized in that: described underframe (1) is provided with two scissors and fixes ear (13), described lower outside bar (6) is fixed ear (13) by described scissor and is hinged on described underframe (1).

5. hand-operated lifting platform according to claim 4, it is characterized in that: be fixed with two pieces of stay bearing plates (16) in described bench board (2) bottom surface, upper outside bar (4) described in two is hingedly fixed on described stay bearing plate (16) respectively, also be connected with third connecting rod (14) in the upper end of two described upper outside bars (4), the upper end of described interior bar (3) is also fixed ear (13) by described scissor and is hinged on described bench board (2) bottom surface.

6. hand-operated lifting platform according to claim 5, is characterized in that: described manual pump (9) is foot pump.

7. hand-operated lifting platform according to claim 6, is characterized in that: described underframe (1) bottom is provided with four rollers (18) for walking.

8. hand-operated lifting platform according to claim 7, is characterized in that: described underframe (1) is also provided with the hand rod (19) promoting the walking of this hand-operated lifting platform.

9. hand-operated lifting platform according to claim 8, is characterized in that: between two parallel upper interior bars (3), be connected with double leval jib (15).

10. hand-operated lifting platform according to claim 9, it is characterized in that: this hand-operated lifting platform also comprises the bracing frame being located at bottom, support frame as described above comprises four groups of corners being hinged on described underframe (1) thus can 270 degree of supporting component (17) rotated, described supporting component (17) comprises one end and the hinged hold-down arm (1701) of described underframe (1), the other end of described hold-down arm (1701) is provided with tapped bore and is provided with studdle (1702) by this tapped bore, described studdle (1702) upper end is provided with by rotating with the driving lever (1703) regulating described studdle (1702) collapsing length, lower end is provided with and is pressed in ground supporting disk (1704).