CN218931509U

CN218931509U - Safety protection device for portal crane

Info

Publication number: CN218931509U
Application number: CN202221956202.XU
Authority: CN
Inventors: 姜朋飞; 王刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2023-04-28
Anticipated expiration: 2032-07-27

Abstract

The utility model discloses a safety protection device for a portal crane, which comprises a pulley box and a footstock, wherein the pulley boxes are symmetrically and integrally arranged at two ends of the footstock, grooved wheels are rotatably arranged in the two groups of pulley boxes through shaft rods, sleeves are symmetrically arranged at the front and back of the tops of the two groups of pulley boxes, the two groups of sleeves and the two groups of pulley boxes are mutually communicated, wear-resistant bushings are arranged at the top ends of the two groups of sleeves, a plurality of groups of balls are arranged on the inner walls of the two groups of wear-resistant bushings, and the safety protection device is characterized in that after goods are hooked and connected through a connecting rod, the hook rotates on the connecting rod through a connecting sleeve, and a limit key arranged on the inner wall of the connecting sleeve and a limit chute on the connecting rod limit rotation, so that a step groove of the lock rod can completely rotate on the top surface of one end of the hook. When the hook is used for a long time, if the step groove at the bottom of the lock rod cannot be contacted with the top surface of the hook, the opening degree of the hook is increased.

Description

Safety protection device for portal crane

Technical Field

The utility model relates to the technical field of crane hook protection, in particular to a safety protection device for a portal crane.

Background

The portal crane is mainly used for loading and unloading operations of outdoor goods yards, stock yards and bulk cargos, has the characteristics of high field utilization rate, large operation range, wide application range, strong universality and the like, is widely used in port goods yards, has a metal structure like a portal frame, is provided with two supporting legs below a bearing girder, can directly walk on a track on the ground, can be provided with overhanging cantilever beams at two ends, and has a door frame structure form, a girder structure, application and the like.

The anti-drop lifting hook of the portal crane is an important safety protection component on the crane, and the anti-drop device is deformed, displaced and the like in the hoisting operation process, so that potential safety hazards of the slipping of the lifting rigging from the large hook exist. And meanwhile, the purchase cost is increased by frequently replacing the anti-drop structure. Meanwhile, the opening degree of the lifting hook can be gradually increased when the lifting hook is used for a long time, and the lifting operation is affected when the opening is too large.

Accordingly, a person skilled in the art provides a safety device for a portal crane to solve the above-mentioned problems set forth in the background art.

Disclosure of Invention

The utility model aims to provide a safety protection device for a portal crane, which is used for solving the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a safety device for portal crane, includes pulley case and footstock, pulley case be located footstock both ends symmetry and integral type setting, the inside of two sets of pulley cases is installed through the axostylus axostyle rotation and is installed the sheave, and symmetry is provided with the sleeve pipe around the top of two sets of pulley cases, and two sets of sleeve pipes link up the setting mutually with two sets of pulley cases, and two sets of sheathed tube tops are provided with wear-resisting bush, and two sets of wear-resisting bush's inner wall is provided with a plurality of groups of balls.

As a still further proposal of the utility model, the whole sleeve is arranged in a T-shaped structure, and the balls on the inner wall of the wear-resistant lining rotate and are placed on the inner wall of the wear-resistant lining and are distributed in a ring shape. One end of the ball protrudes out of the inner wall of the wear-resistant lining, and the sleeve is in threaded connection with the wear-resistant lining.

As a still further scheme of the utility model, a transverse plate is fixedly arranged between the bottoms of the two groups of pulley boxes, a connecting rod penetrates through the transverse plate and is fixedly arranged at the position of the transverse plate, and a limiting cap is arranged at the top of the connecting rod. The bottom integral type of connecting rod is provided with the couple.

As a still further proposal of the utility model, the diameter of the connecting rod is smaller than the diameter of the connecting part with the hook, the connecting rod and the hook are connected to form a right-angle step, the connecting sleeve is sleeved on the connecting rod, and the locking rod is fixedly arranged on one side of the connecting sleeve.

As a still further proposal of the utility model, a limit chute is arranged on the circumference of one side of the connecting rod, the whole limit chute is arranged in a transverse L-shaped structure, and a limit key which is mutually jogged with the limit chute is fixedly arranged on one side of the inner wall of the connecting sleeve.

As a still further proposal of the utility model, one end of the lock rod is vertically bent downwards, the bottom surface of the lock rod is provided with a right-angle step groove, and the top surface of the step groove is contacted with the top end of the hook.

As a still further aspect of the present utility model, the lock lever is integrally formed of a steel material. The two groups of wear-resistant bushings are integrally made of high manganese steel materials with better wear resistance.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the pulley box, the sleeve and the wear-resistant bushing, the mooring rope can be sleeved from the grooved pulley inside the pulley box when in use, and is led out from the two sleeve ends to be in winding connection with external traction equipment. The cable can slide through the wear-resistant bushing during traction, and the rolling balls in the wear-resistant bushing can reduce friction between the cable and the wear-resistant bushing, so that friction damage of the cable is reduced, and service life is prolonged. And meanwhile, the wear-resistant bushing is in threaded connection with the sleeve, so that the replacement is convenient.

2. Through connecting rod, spacing arc groove and the locking lever that set up, its protection principle is, after the couple connects the goods, through the adapter sleeve rotatory on the connecting rod, because spacing key that the adapter sleeve inner wall set up is spacing rotation with spacing spout on the connecting rod, makes the step groove of locking lever can rotate in the one end top surface of couple completely. When the hook is used for a long time, if the step groove at the bottom of the lock rod cannot be contacted with the top surface of the hook, the opening degree of the hook is increased. If one side of the step groove at the bottom of the lock rod is out of contact with the top of the hook, the hook can be judged to be unusable.

Drawings

FIG. 1 is a schematic view of the overall structure of a safety device for a portal crane;

FIG. 2 is a schematic view showing the detachment of a locking bar from a connecting bar of a safety device for a portal crane;

fig. 3 is a disassembled view of the wear bushing and sleeve of a safety shield apparatus for a portal crane.

In the figure: 1. a pulley box; 101. a sheave; 102. a top base; 103. wear-resistant bushings; 104. a sleeve; 105. a ball; 2. a hook; 201. a cross plate; 202. a limit cap; 203. connecting sleeves; 204. a connecting rod; 205. a step groove; 206. a lock lever; 207. limiting sliding grooves; 208. and a limit key.

Detailed Description

Referring to fig. 1-3, in the embodiment of the utility model, a safety protection device for a portal crane comprises a pulley box 1 and a top seat 102, wherein the pulley box 1 is symmetrically and integrally arranged at two ends of the top seat 102, grooved pulleys 101 are rotatably arranged in the pulley box 1 through shafts, sleeves 104 are symmetrically arranged at the front and back of the tops of the pulley boxes 1, the sleeves 104 and the pulley boxes 1 are mutually communicated, wear-resistant bushings 103 are arranged at the top ends of the sleeves 104, a plurality of groups of balls 105 are arranged on the inner walls of the wear-resistant bushings 103, the diameter of a connecting rod 204 is smaller than that of a connecting position of a hook 2, a right-angle step is formed by connecting the connecting rod 204 with the hook 2, a connecting sleeve 203 is sleeved on the connecting rod 204, a lock rod 206 is fixedly arranged at one side of the connecting sleeve 203, and the lock rod 206 is integrally made of steel materials. The two groups of wear-resistant bushings 103 are integrally made of high manganese steel materials with good wear resistance, so that the structural strength is improved.

As shown in fig. 1-3, the sleeve 104 is integrally provided in a T-shaped structure, and the balls 105 on the inner wall of the wear-resistant bush 103 rotate and are placed on the inner wall of the wear-resistant bush 103 and are distributed in a ring shape. One end of the ball 105 protrudes out of the inner wall of the wear-resistant bushing 103, the wear-resistant bushing 103 can be formed by sleeving an inner bushing and an outer bushing, and the ball 105 is arranged between the inner bushing and the outer bushing in a rolling way. While the balls 105 may also be replaced by cylinders rotatably mounted inside the wear bushing 103, depending on design requirements. And sleeve 104 is threaded with wear-resisting bush 103, when the cable is contacted with wear-resisting bush 103 inside ball 105 in the use, reduce friction and prolong the life of cable.

As shown in fig. 1-3, a transverse plate 201 is fixedly arranged between the bottoms of the two groups of pulley boxes 1, a connecting rod 204 is penetrated and fixedly arranged at the position of the transverse plate 201, a limit cap 202 is arranged at the top of the connecting rod 204, and the limit cap 202 can further play a role in protection to prevent the hook 2 from falling off. The bottom of the connecting rod 204 is integrally provided with a hook 2.

As shown in fig. 1-3, a limit chute 207 is provided on a circumferential surface of one side of the connecting rod 204, and the limit chute 207 is integrally provided in a transverse L-shaped structure. One end of the limiting chute 207 is radially arranged along the circumferential surface of the connecting rod 204, and the other end of the limiting chute is axially arranged along the circumferential surface of the connecting rod 204. A limit key 208 which is mutually embedded with the limit sliding groove 207 is fixedly arranged on one side of the inner wall of the connecting sleeve 203.

As shown in fig. 1-3, one end of the lock rod 206 is vertically bent downwards, a right-angle step groove 205 is formed in the bottom surface of the lock rod 206, the top surface of the step groove 205 is in contact with the top end of the hook 2, and if the step groove 205 at the bottom of the lock rod 206 cannot be in contact with the top surface of the hook 2 during long-term use, the opening degree of the hook 2 is increased.

The working principle of the utility model is as follows: when in use, the cable is wound on the grooved wheels 101 in the pulley box 1, led out from the ends of the two sets of sleeves 104 and wound on external traction equipment, and passes through the wear-resistant bushing 103 during traction, and the balls 105 rolling in the wear-resistant bushing 103 can reduce friction between the cable and the wear-resistant bushing 103, reduce friction damage of the cable and prolong service life. And meanwhile, the wear-resistant bushing 103 is in threaded connection with the sleeve 104, so that the replacement is convenient. After the hook 2 is hung with goods, the hook is rotated on the connecting rod 204 through the connecting sleeve 203, and the step groove 205 of the lock rod 206 can be completely rotated on the top surface of one end of the hook 2 due to the limit rotation of the limit key 208 arranged on the inner wall of the connecting sleeve 203 and the limit sliding groove 207 on the connecting rod 204. If the step groove 205 at the bottom of the lock lever 206 cannot contact with the top surface of the hook 2 when the hook is used for a long time, the opening degree of the hook 2 is increased. If the side of the stepped groove 205 at the bottom of the lock lever 206 is to be out of contact with the top of the hook 2, it can be judged that the hook 2 cannot be used.

The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. Safety protection device for portal crane, comprising a pulley box (1) and a top seat (102), characterized in that: the pulley box (1) is located both ends symmetry and the integral type setting of footstock (102), and sheave (101) are installed through the axostylus axostyle rotation to the inside of two sets of pulley boxes (1), and symmetry is provided with sleeve pipe (104) around the top of two sets of pulley boxes (1), and two sets of sleeve pipes (104) link up setting mutually with two sets of pulley boxes (1), and the top of two sets of sleeve pipes (104) is provided with wear-resisting bush (103), and the inner wall of two sets of wear-resisting bush (103) is provided with a plurality of groups of balls (105).

2. The safety protection device for the portal crane according to claim 1, wherein the sleeve (104) is integrally arranged in a T-shaped structure, balls (105) on the inner wall of the wear-resistant bush (103) rotate and are placed on the inner wall of the wear-resistant bush (103) and are distributed in a ring shape, one end of each ball (105) protrudes out of the inner wall of the wear-resistant bush (103), and the sleeve (104) is in threaded connection with the wear-resistant bush (103).

3. Safety protection device for portal cranes according to claim 1, characterized in that a transverse plate (201) is fixedly arranged between the bottoms of the two groups of pulley boxes (1), a connecting rod (204) is fixedly installed at the position of the transverse plate (201) in a penetrating way, a limit cap (202) is arranged at the top of the connecting rod (204), and a hook (2) is integrally arranged at the bottom of the connecting rod (204).

4. A safety device for a portal crane according to claim 3, wherein the diameter of the connecting rod (204) is smaller than the diameter of the connecting part of the hanger (2), the connecting rod (204) and the hanger (2) are connected to form a right-angle step, the connecting sleeve (203) is sleeved on the connecting rod (204), and a lock rod (206) is fixedly arranged on one side of the connecting sleeve (203).

5. The safety protection device for the portal crane of claim 4, wherein a limit chute (207) is formed on a circumferential surface of one side of the connecting rod (204), the limit chute (207) is integrally formed in an L-shaped structure, and a limit key (208) which is mutually embedded with the limit chute (207) is fixedly arranged on one side of the inner wall of the connecting sleeve (203).

6. The safety protection device for the portal crane according to claim 4, wherein one end of the lock rod (206) is bent vertically downwards, a right-angle step groove (205) is formed in the bottom surface of the lock rod (206), and the top surface of the step groove (205) and the top end of the hook (2) are in contact with each other.

7. The safety device for a portal crane according to claim 4, wherein the lock rod (206) is integrally formed of a steel material, and the two sets of wear-resistant bushings (103) are integrally formed of a high manganese steel material having excellent wear resistance.