Safety protection device for hoisting machinery

Abstract

The utility model discloses a safety protection device for hoisting machinery, and relates to the technical field of hoisting machinery. Comprising a supporting plate, a pull ring and two pneumatic clamping jaws, the two pneumatic clamping jaws are symmetrically arranged on the two sides of the bottom of the supporting plate, and connecting parts are arranged on the tops of the pneumatic clamping jaws. The protective device is arranged, in the initial state, under the action of the weight of the balance weight head and the inserting rod, the pull rope pulls the inserting block, the inserting block is contained in the inserting groove, when the round pipe fitting is clamped, the balance weight head and the top end of the round pipe fitting are squeezed, the inserting rod moves upwards along the inserting rod, and under the action of the gravity of the inserting block, the inserting rod is inserted into the inserting groove. When the round pipe fitting is lifted, the inserting block and the protection plates fall to the two sides of the bottom of the round pipe fitting, when one pneumatic clamping jaw is damaged, the round pipe fitting is separated from the pneumatic clamping jaw, at the moment, the two protection plates at the position support the round pipe fitting, the round pipe fitting is prevented from being separated from the other pneumatic clamping jaw under the action of gravity, and protection in the round pipe fitting lifting process is achieved.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, specifically a safety protection device for lifting machinery. Background Technology

[0002] Lifting machinery refers to electromechanical equipment used for vertical lifting or vertical lifting and horizontal movement of heavy objects.

[0003] Chinese utility model patent, authorized announcement number CN221253622U, discloses a safety protection device for lifting machinery. This device is adjustable according to tubular objects of different lengths, making it more versatile. After the two second rectangular plates are adjusted, the two ends of the tubular object are placed in the center of the two semi-circular fixed plates, and the goods are clamped and fixed by pneumatic grippers. The device is easy to operate and has good stability. It can also be adapted to tubular objects of different sizes.

[0004] The above solution solves the technical problems mentioned in the background art. However, in practical applications, the above solution still has certain defects. For example, during the lifting of tubular goods, if one or two pneumatic grippers are damaged, the pneumatic grippers cannot grasp the tubular goods. Under the gravity of the tubular goods, there may be a risk that the tubular goods will fall. Utility Model Content

[0005] The purpose of this utility model is to provide a safety protection device for lifting machinery to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a safety protection device for lifting machinery, comprising a support plate, a pull ring and two pneumatic grippers, wherein the two pneumatic grippers are symmetrically arranged on both sides of the bottom of the support plate, and a connecting part is provided on the top of the pneumatic grippers;

[0007] The connecting part includes a first vertical rod and a second vertical rod, which are movably connected by a pin.

[0008] The support plate is symmetrically equipped with protective devices on both sides. The two protective devices are located between the two pneumatic grippers. When one or both pneumatic grippers are damaged, the protective devices will support the round pipe.

[0009] Preferably, the protective device includes a horizontal plate fixed on both sides of the support plate, an inclined block fixed on the outside of the horizontal plate, a slot opened in the inclined block, an insert block movably inserted into the slot, and a first limiting head fixed on the top of the insert block located in the slot.

[0010] The bottom plate of the insert is located at the bottom of the round pipe fitting;

[0011] A drive unit is provided between the two plug blocks.

[0012] Preferably, the included angle between the two inserts is 40-120 degrees.

[0013] Preferably, a protective plate is formed at the bottom of the insert block, and the outer side of the protective plate is covered with a rubber anti-slip sleeve.

[0014] Preferably, the driving component includes a socket rod fixed to the bottom end of the support plate, a plug rod is movably inserted into the socket rod, and a second limiting head is fixed to the top end of the plug rod;

[0015] The support plate has insertion holes on both sides, and pull ropes are installed in the insertion holes. The two ends of the pull ropes are fixed to the side of the insertion block and the top of the insertion rod, respectively.

[0016] Preferably, a counterweight head is fixed at the bottom end of the insertion rod.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This lifting machinery safety protection device is equipped with a protective device. In the initial state, under the weight of the counterweight head and the insert rod, the pull rope pulls the insert block, which is stored in the slot. When clamping the round pipe, the counterweight head is pressed against the top of the round pipe, and the insert rod moves upward along the receiving rod. Under the gravity of the insert block, the insert block and the protective plate fall to the bottom sides of the round pipe. When one of the pneumatic grippers is damaged, the round pipe at that point is separated from the pneumatic gripper. At this time, the two protective plates at that point support the round pipe to prevent it from separating from the other pneumatic gripper under the action of gravity, thus achieving protection during the lifting process of the round pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the working state of this utility model;

[0020] Figure 2 This is a side axial view of the present invention;

[0021] Figure 3 This is a half-sectional view of the protective device of this utility model.

[0022] In the diagram: 1. Support plate; 2. Pneumatic gripper; 201. First vertical rod; 202. Second vertical rod; 3. Pull ring; 4. Protective device; 401. Horizontal plate; 402. Inclined block; 403. Slot; 404. Insertion block; 405. Protective plate; 406. First limiting head; 407. Socket rod; 408. Insertion rod; 409. Counterweight head; 410. Pull rope; 411. Guide tube; 5. Round pipe fitting. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-3 As shown, this utility model provides a technical solution: a safety protection device for lifting machinery, including a support plate 1, a pull ring 3 and two pneumatic grippers 2. The pull ring 3 is fixed at the middle position of the top of the support plate 1 and is used to connect the boom of the crane. The two pneumatic grippers 2 are symmetrically arranged on both sides of the bottom of the support plate 1 and are used to clamp the two sides of the round pipe 5 to realize the lifting of the round pipe 5.

[0025] A connecting part is provided at the top of the pneumatic gripper 2, wherein, for example, Figure 1 or Figure 2 As shown, the connecting part includes a first vertical rod 201 and a second vertical rod 202. The first vertical rod 201 and the second vertical rod 202 are movably connected by a pin. Through the connection of the pin, the pneumatic gripper 2 can rotate around the pin towards the support plate 1.

[0026] like Figure 1 and Figure 3 As shown, protective devices 4 are symmetrically arranged on both sides of the support plate 1. The two protective devices 4 are located between the two pneumatic grippers 2. When one or both pneumatic grippers 2 are damaged, the protective devices 4 support the round tube 5.

[0027] Specifically, such as Figure 3 As shown, the protective device 4 includes a horizontal plate 401 fixed to both sides of the support plate 1. A wedge block 402 is fixed to the outside of the horizontal plate 401. A slot 403 is provided in the wedge block 402. A plug 404 is movably inserted into the slot 403. The wedge block 402 and the plug 404 are collinear. A first limiting head 406 is fixed to the top of the plug 404 located in the slot 403. When the plug 404 extends completely out of the slot 403, the first limiting head 406 and the bottom inner wall of the wedge block 402 are closed. The two inserts 404 are in contact with each other, which prevents the insert 404 from dislodging from the slot 403. It should be noted that the bottom plate of the insert 404 is located at the bottom of the round tube 5 and there is a gap between the insert 404 and the round tube 5. The included angle between the two inserts 404 is 40-120 degrees. In one embodiment of this solution, the preferred angle is 45 degrees. In this way, even if the pneumatic gripper 2 does not clamp the round tube 5, the two inserts 404 can still support the round tube 5.

[0028] To increase the friction between the insert 404 and the round tube 5, a protective plate 405 is formed at the bottom of the insert 404, and the outer side of the protective plate 405 is covered with a rubber anti-slip sleeve.

[0029] A driving component is provided between the two insert blocks 404. The driving component drives the insert blocks 404 to move along the slots 403. Specifically, the driving component includes a receiving rod 407 fixed to the bottom of the support plate 1. An insert rod 408 is movably inserted into the receiving rod 407. A second limiting head is fixed to the top of the insert rod 408. Similarly, the second limiting head limits the insert rod 408 to prevent it from disengaging from the receiving rod 407. The driving component is located on both sides of the support plate 1. An insertion hole is provided, and a pull rope 410 is provided inside the insertion hole. The two ends of the pull rope 410 are fixed to the side of the insertion block 404 and the top of the insertion rod 408, respectively. To reduce the wear of the pull rope 410, a guide tube 411 is fixed to the outside of the insertion hole. A counterweight head 409 made of metal material is fixed to the bottom of the insertion rod 408. It is known that in the initial state, under the gravity of the counterweight head 409 and the insertion rod 408, the insertion block 404 is stored in the slot 403.

[0030] As a supplement to this solution, in the initial state, under the weight of the counterweight head 409 and the insertion rod 408, the pull rope 410 pulls the insertion block 404, which is housed in the slot 403. When the round pipe 5 is clamped, the counterweight head 409 presses against the top of the round pipe 5, and the insertion rod 408 moves upward along the receiving rod 407. Under the gravity of the insertion block 404, the insertion block 404 and the protective plate 405 fall to the bottom sides of the round pipe 5. When one of the pneumatic grippers 2 is damaged, the round pipe 5 at that point is separated from the pneumatic gripper 2. At this time, the two protective plates 405 at that point support the round pipe 5 to prevent it from being separated from the other pneumatic gripper under its own weight, thus protecting the round pipe 5 during the lifting process.

[0031] When the round pipe 5 is lifted and needs to be lowered, the pneumatic gripper 2 slowly releases its grip on the round pipe 5. As the round pipe 5 moves downward, the counterweight head 409 moves downward under its own weight. Since there is a gap between the insert block 404 and the round pipe 5, the insert block 404 is stored in the slot 403. Alternatively, the operator can pull the insert block 404 upward to store it in the slot 403. At the same time as storage, the pneumatic gripper 2 slowly releases its grip on the round pipe 5.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A safety shield for a hoisting machine comprising a support plate (1), a pull ring (3) and two pneumatic jaws (2), characterized in that: Two said pneumatic clamping jaws (2) are symmetrically arranged at the bottom of the support plate (1) on both sides, and the top of the pneumatic clamping jaw (2) is provided with a connecting part; The connecting part comprises a first vertical rod (201) and a second vertical rod (202), and the first vertical rod (201) and the second vertical rod (202) are movably connected by a pin shaft; The support plate (1) is symmetrically provided with a protection device (4) on both sides, and the two protection devices (4) are located between the two pneumatic clamping jaws (2), so that when one or both of the pneumatic clamping jaws (2) are damaged, the protection device (4) can support the circular pipe (5).

2. A load handling safety shield according to claim 1, characterised in that: The protection device (4) comprises a horizontal plate (401) fixed on both sides of the support plate (1), an inclined block (402) fixed outside the horizontal plate (401), an insertion slot (403) formed in the inclined block (402), an insertion block (404) movably inserted into the insertion slot (403), and a first limiting head (406) fixed on the top of the insertion block (404) located in the insertion slot (403). The bottom plate body of the insertion block (404) is located at the bottom of the circular pipe (5). A driving member is arranged between the two insertion blocks (404).

3. A load handling safety shield according to claim 2, wherein: The included angle formed between the two insertion blocks (404) is 40-120 degrees.

4. A load handling safety shield according to claim 2, wherein: The insertion block (404) is formed with a protection plate (405), and the outer side of the protection plate (405) is covered with a rubber anti-skid sleeve.

5. A load handling safety shield according to claim 2, wherein: The driving member comprises a socket rod (407) fixed at the bottom end of the support plate (1), an insertion rod (408) movably inserted into the socket rod (407), and a second limiting head fixed at the top end of the insertion rod (408). The two side plate bodies of the support plate (1) are both provided with an insertion hole, and a pull rope (410) is arranged in the insertion hole, and the two ends of the pull rope (410) are respectively fixed with the side surface of the insertion block (404) and the top end of the insertion rod (408).

6. A load handling safety shield according to claim 5, wherein: The bottom end of the insertion rod (408) is fixed with a counterweight head (409).

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