CN102394481B - Self-locking device used for lifting member - Google Patents

Abstract

The invention discloses a self-locking device used for component lifting in the field of transmission line maintenance. The self-locking device is arranged in pairs on two parallel well-shaped frames of the lifting platform; the self-locking device includes a fixed Stopper, gripper, back-moving spring and balance cable; Described fixed stopper is erected on the well-tac-toe frame along the horizontal horizontal direction of described well-tac-toe frame; The first end of described gripper is pivotally connected to fixed stopper by rotating shaft Above, the second end of the handle is a notch; the first end of the return spring is connected to the lower grip of the notch, and the second end of the return spring is connected to the bottom of the fixed block. On the well-shaped frame; the first end of the balance cable is connected to the upper grip of the notch, and the second end of the balance cable goes around the pulley fixed on the well-shaped frame above the fixed block Natural drooping; when the self-locking device is balanced, the grip is inclined to the horizontal plane, and when locked, the grip is parallel to the horizontal plane.

Description

A self-locking device for component lifting

technical field

The invention relates to a self-locking device for lifting and lowering components in the field of power transmission line maintenance.

Background technique

With the rapid development of regional economy and large-scale urban construction in recent years, the demand for power load has continued to increase significantly. At the same time, users have put forward higher requirements for the quality and reliability of power supply, and generally hope to reduce the time and frequency of power outages. In order to ensure that the user's demand for electricity is met, live construction operations have been carried out to reduce the scope and duration of power outages, which has become an inevitable requirement.

At present, the live working tools that can quickly reach the accident site are mainly 10kV insulated bucket trucks. However, 10kV insulated bucket trucks cannot enter narrow streets, lanes, residential areas, farmland, etc. In places, it also often blocks traffic and causes adverse social repercussions. On the other hand, 10kV insulated arm trucks are expensive, and the number of equipment is limited, so they cannot be used for a long time.

In summary, it is necessary to develop insulation tools for manned live working that are suitable for the above-mentioned environment. Insulation tools for live work include a lifting platform, which must occupy a small area, be easy to build and dismantle, and must ensure the safety of construction personnel during the building process. At the same time, the lifting platform must fix the insulating platform of the live working insulating tool at the designated position for live working work. But there are not many reports in this area.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and provide a self-locking device for component lifting in the field of transmission line maintenance. It can fix the insulation platform of the insulation tool for live work at the designated position, which is convenient for the live operation of the live work personnel, and also ensures the personal safety of the live work personnel.

A technical solution to achieve the above object is: a self-locking device for component lifting, the self-locking device is arranged in pairs on two parallel well-shaped frames of the lifting platform; the self-locking device includes Fixed stoppers, grippers, return springs and balance cables;

The fixed block is erected on the well-shaped frame along the horizontal direction of the well-shaped frame;

The first end of the gripper is pivotally connected to the fixed block through a rotating shaft, and the second end of the gripper is a notch composed of an upper gripping portion and a lower gripping portion;

The first end of the return spring is connected to the lower grip part of the notch, and the second end of the return spring is connected to the well-tac-toe frame below the fixed block;

The first end of the balance cable is connected to the upper grip part of the notch, and the second end of the balance cable hangs down naturally after bypassing the pulley on the well-tac-toe frame fixed above the fixed block;

When the self-locking device is balanced, the grip is inclined to the horizontal plane,

When the self-locking device is locked, the handle is parallel to the horizontal plane.

Further, when the self-locking device is unlocked, the handle is perpendicular to the horizontal plane. Further, the fixed block is erected on the longitudinal horizontal beam of the well-shaped frame along the horizontal and transverse direction of the well-shaped frame.

Further, the second end of the return spring is connected to the column of the well-tac-toe frame under the fixed block.

Further, the pulley 46 is fixed on the horizontal horizontal beam 52 or the longitudinal horizontal beam 53 of the well-shaped frame above the fixed block.

A technical solution of the self-locking device for component lifting is adopted in the present invention, that is, the position of the gripper is controlled by the return spring and the balance cable to realize the unlocking and locking of the self-locking device. The technical effect is that the self-locking device can fix the insulating platform of the live working insulating tool on the designated position of the lifting platform, thereby facilitating the live operation of live workers and ensuring the personal safety of live workers.

Description of drawings

Fig. 1 is a structural schematic diagram of a self-locking device for component lifting of the present invention;

Fig. 2a is a schematic diagram of the position of the gripper in a locked state of a self-locking device for component lifting according to the present invention;

Fig. 2b is a schematic diagram of the position of the gripper in the unlocked state of a self-locking device for component lifting according to the present invention;

Fig. 3 a is a structural schematic diagram of a lifting platform with a self-locking device for component lifting of the present invention installed before the inner support of the lifting platform and the insulating platform are installed;

Figure 3b is a schematic diagram of the inner support structure of the lifting platform;

Figure 3c is a side view of the single-section structure of the inner bracket of the lifting platform;

Figure 3d is a schematic structural diagram of the hydraulic trolley of the lifting platform;

Fig. 4 is a structural schematic diagram of a lifting platform with a self-locking device for component lifting of the present invention installed after the inner support of the lifting platform and the insulating platform are installed;

Fig. 5 is a three-dimensional structural schematic diagram of the lifting platform with a self-locking device for component lifting of the present invention installed after the inner bracket and the insulating platform of the lifting platform are installed.

Detailed ways

Please refer to Fig. 1 to Fig. 5, in order to better understand the technical solution of the present invention, the following specific embodiments are described in detail in conjunction with the accompanying drawings:

A self-locking device for component lifting according to the present invention, the self-locking devices are arranged in pairs on two parallel well-shaped frames 5 of the lifting platform.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a self-locking device for lifting and lowering components according to the present invention. Described self-locking device comprises fixed block 41, gripper 42, back-moving spring 43 and balance cable 44; Wherein fixed block 41 is erected on the described well-shaped frame 5 along the horizontal horizontal direction of described well-shaped frame 5, described The first end of the gripper 42 is pivotally connected to the fixed block 41 through the rotating shaft 45, and the second end of the gripper 42 is a notch 421 composed of an upper gripping portion and a lower gripping portion; The first end of the back-moving spring 43 is connected to the lower grip portion of the notch 421, and the second end of the back-moving spring 43 is connected to the well-tac-toe frame below the fixed block 41; The first end is connected to the upper gripping portion of the notch 421 , and the second end of the balance cable 44 hangs down naturally after bypassing the pulley 46 fixed on the well-shaped frame 5 above the fixed block 41 .

In actual use, the fixed block 41 is erected on the longitudinal horizontal beam of the well-shaped frame along the horizontal direction of the well-shaped frame 5; the second end of the back-moving spring 43 is generally fixed on On the column 51 of the well-shaped frame 5 below the fixed block 41; the pulley 46 is generally fixed on the horizontal horizontal beam 52 or the longitudinal horizontal beam 53 of the well-shaped frame 5 above the fixed block 41; design like this The purpose is to increase the structural strength of the self-locking device.

In Fig. 1, the self-locking device is in a balanced state, the pulling force generated by the balance cable 44 is equal to the pulling moment generated by the return spring 43, and the grip 42 is inclined to the horizontal plane. The position at must be able to ensure that the longitudinal horizontal beam 61 of the inner bracket 6 can slide into the notch 421 of the handle 42 when the inner bracket 6 of the lifting platform slides downward. In actual use, inner brackets 6 of different specifications can be selected according to the position of the handle 42 when the self-locking device is balanced. Please refer to Fig. 2a and Fig. 2b. Fig. 2a and Fig. 2b show the positions of the gripper 42 in a locked state and an unlocked state, respectively, of a self-locking device for component lifting according to the present invention.

In Fig. 2a, the self-locking device is in a locked state. At this time, the handle 42 is parallel to the horizontal plane, and the longitudinal horizontal beam 61 of the inner bracket 6 of the lifting platform is supported by the notch 421 of the handle 42. Support 6 no longer falls.

The self-locking device described in Fig. 2b is in the unlocked state, and now the grip 42 is perpendicular to the horizontal plane, so that the inner support 6 is not blocked by the grip 42 of the self-locking device during the falling process, but the grip 42 Being perpendicular to the horizontal plane is not a necessary condition, as long as the inner support 6 is not blocked by the handle 42 of the self-locking device during the falling process when the self-locking device is in the unlocked state. The purpose of setting the balance cable 44 in the present invention is to pull the handle 42 to the unlocked position in the process of dismounting the inner bracket 6, so as to ensure that the inner bracket 6 can be locked on the two grippers of the self-locking device arranged in pairs. Falling in the space between 42 is not blocked by the gripper 42 of the self-locking device, so the balance cable 44 is a necessary part.

Taking Fig. 3a, Fig. 3b, Fig. 3c, Fig. 3d, Fig. 4 and Fig. 5 as examples below, the process of lifting the insulating platform 1 with a self-locking device 4 for component lifting of the present invention installed .

Described lifting platform comprises two parallel well-shaped frames 5, inner support 6, hydraulic trolley 7 and a kind of self-locking device 4 that is used for component lifting of the present invention, described two well-shaped frames 5 bottom inner sides are paired Vertical guide rails 56 are set opposite to each other. The hydraulic trolley 7 includes an operating rod 71 and a hydraulic regulating valve 72. Pulleys 73 are arranged on both sides of the hydraulic trolley 7. The top of the trolley is a bearing insulating platform 1 and an insulating interval 2. , Fine-tuning the installation plane of the lifting mechanism 3 and the inner support 6.

First place the bottom plane for installing the lifting platform horizontally directly below the construction point, set up the well-shaped frame 5 of the lifting platform at the corresponding position, and set the horizontal adjustment screw 57 on the bottom surface of the well-shaped frame 5 to adjust the level. Adjust screw 57, make described well-tac-toe frame 5 to vertical state, and described well-tac-toe frame 5 is fixed, generally adopt the form of diagonal brace 54 to fix described well-tac-toe frame 5 in actual use, then in two parallel A hydraulic trolley 7 is arranged between the well-shaped frame 5 of the hydraulic trolley, and the pulley 73 of the hydraulic trolley 7 is clamped on the guide rail 56, and the hydraulic trolley 7 can slide vertically along the guide rail 56. The platform 1, the insulation interval 2, the fine-tuning lifting mechanism 3 and the inner bracket 6 perform the jacking operation. At this time, the self-locking device 4 on the well 5 is in a balanced state. In order to fix the well-tac-toe frame 5, a fixed beam 55 is also arranged between the two well-tac-toe frames 5. As shown in Figure 3a.

Put the assembled insulation platform 1, insulation interval 2, fine-tuning lifting mechanism 3 and a section of inner bracket 6 as a whole (not shown in Fig. 3a) directly on the installation plane of the hydraulic trolley 7, and use your feet to step on the The operating lever 71 of the hydraulic trolley 7 makes the guide rail 56 of the hydraulic trolley 7 slide upward. The longitudinal horizontal beam 61 of the inner support 6 produces an upward thrust to the gripper 42 of the self-locking device 4, which destroys the original moment balance of the gripper 42 of the self-locking device 4, and the gripper 42 and The included angle between the horizontal planes increases, so that the longitudinal horizontal beam 61 of the inner bracket 6 passes over the handle 42 of the self-locking device 4 . At this moment, the hydraulic trolley 7 no longer rises, and the hydraulic control valve 72 of the hydraulic trolley 7 is released, so that the hydraulic trolley 7 descends to the bottom along the guide rail 56 . And the handle 42 of the self-locking device 4 returns to the equilibrium position under the action of the pulling force of the return spring 43, and the longitudinal horizontal beam 61 of the inner bracket falls into the grip of the self-locking device 4 during the falling process of the inner bracket 6. In the notch 421 of the hand 42, under the action of gravity of the inner bracket 6 and above, the gripper 42 makes the gripper 42 of the self-locking device 4 reach the locked position, and the gripper of the self-locking device 4 Under the supporting effect of the notch 421 of 42 to the longitudinal horizontal beam 61 of the inner support 6, the inner support 6 and the above part no longer descend. An open space has just been formed between the bottom of the inner support 6 and the installation plane of the hydraulic trolley 7 like this, and the height of this space is greater than the height of a joint inner support 6 . Then put into the second joint interior support 6, make described hydraulic trolley 7 rise along described guide rail 56 with the same method. When the support 6 in the first joint and the second joint is in contact, the hydraulic trolley 7 remains stationary. Then the column 63 of the first section and the second section inner support 6 is fastened with the stainless steel connector 64. Then the hydraulic trolley 7 continues to rise along the guide rail 56, and after the longitudinal horizontal beam 61 of the support 6 in the second section passes over the handle 42 of the self-locking device 4, the hydraulic trolley 7 no longer rises along the guide rail 56 , but loosen the hydraulic control valve 72 of the hydraulic trolley 7 by hand, so that the hydraulic trolley 7 descends to the bottom along the guide rail 56, and the notch 421 of the handle 42 of the self-locking device 4 supports the second inner support 6 The longitudinal horizontal beam 61. Then put into the third section inner support 6. The following operation sequence can refer to the steps of installing the inner bracket 6 in the first two sections. Fix the bottom of the inner support 6 at the bottom end until the insulating platform 1 is raised to the height required for construction, as shown in FIG. 4 . Then, the operator can climb onto the insulating platform 1 along the steps 62 of the inner support 6 . When dismounting, first loosen the fixing at the bottom of the inner bracket 6 of the last section (the bottommost section), and then step on the operating lever 71 of the hydraulic trolley 7 to make the hydraulic trolley 7 rise along the guide rail 56 and push it up. Raise the inner support 6. When the longitudinal horizontal crossbeam 61 of the first joint inner support 6 at the bottom end rises enough to reset the grab handle 42 of the self-locking device 4, that is, when the self-locking device 4 is in a balanced state, pull the balance cable 44 to make the self-locking device 4 reset. The handle 42 of the self-locking device 4 reaches the unlocking position, that is, the falling of the inner support 6 is not blocked by the handle 42 of the self-locking device 4 during the falling process, and the hydraulic control valve 72 of the hydraulic trolley 7 is released. Make the integral whereabouts of insulation platform 1, insulation interval 2, fine-tuning lifting mechanism 3 and inner bracket 6 composition. When the horizontal longitudinal horizontal crossbeam 61 of the bottom second inner support 6 was supported by the gripper 42 of the self-locking device 4, the hydraulic trolley 7 remained stationary, and the stainless steel connector 64 was opened, and the hydraulic trolley 7 and the last joint Support 6 descends to the bottom, just can take out last joint inner support 6. By analogy, until the disassembly of the first section inner support 6 at the top is completed, at this moment the insulating platform 1, the insulating interval 2, the fine-tuning lifting mechanism 3, etc. can be removed together to complete the disassembly.

Please refer to Fig. 5, the opposite inner sides of two parallel well-shaped frames 5 in Fig. 5, along the axial direction of the longitudinal horizontal crossbeam 53 of said well-shaped frame 5, several pairs of said self-locking devices 4 are arranged, simultaneously, in In the vertical direction, several pairs of self-locking devices 4 are also arranged on the opposite insides of the two parallel well-shaped frames 5, and the vertical distance between every two pairs of self-locking devices 4 is a single-section inner bracket. 6 Integer multiples of the height in the vertical direction. The purpose of this design is to increase the stability and strength of the lifting platform structure.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than as a limitation to the present invention, as long as within the scope of the spirit of the present invention, the above-described embodiments Changes and modifications will fall within the scope of the claims of the present invention.

Claims (5)

1. self-locking device that is used for the member lifting, described self-locking device is arranged on two well cabinet frames (5) that be arranged in parallel of hoistable platform in pairs in opposite directions; It is characterized in that:

Described self-locking device comprises fixed stop (41), handgrip (42), back-moving spring (43) and tail rope (44);

Described fixed stop (41) is erected on the described well cabinet frame (5) along the horizontal cross of described well cabinet frame (5);

First end of described handgrip (42) is articulated on the described fixed stop (41) by rotation axis (45), the recess (421) that grasping part and following grasping part were formed on second end of described handgrip (42) was served as reasons;

First end of described back-moving spring (43) connects the following grasping part of described recess (421), and second end of described back-moving spring (43) is connected on the well cabinet frame (5) of described fixed stop (41) below;

First end of described tail rope (44) connects the last grasping part of described recess (421), and pulley (46) back that second end of described tail rope (44) is walked around on the well cabinet frame (5) that is fixed in described fixed stop (41) top is sagging naturally;

Described self-locking device balance, described handgrip (42) tilts with horizontal plane,

Described self-locking device locking, described handgrip (42) is parallel with horizontal plane.

2. self-locking device according to claim 1, it is characterized in that: described self-locking device release, described handgrip (42) is vertical with horizontal plane.

3. self-locking device according to claim 1 and 2, it is characterized in that: described fixed stop (41) is erected on the vertical equity crossbeam (53) of described well cabinet frame (5) along the horizontal cross of described well cabinet frame (5).

4. self-locking device according to claim 1 and 2 is characterized in that: second end of described back-moving spring (43) is connected on the column (51) of well cabinet frame (5) of described fixed stop (41) below.

5. self-locking device according to claim 1 and 2 is characterized in that: described pulley (46) is fixed on the transverse horizontal crossbeam (52) or vertical equity crossbeam (53) of well cabinet frame (5) of described fixed stop (41) top.

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