Mechanical automatic grab beam device and its usage method

Abstract

The present invention relates to a mechanical automatic grab beam device and its usage method. The purpose of the present invention is to provide a mechanical automatic grab beam device and its usage method with simple structure, safety and reliability, and easy operation. The technical solution of the present invention is: This device is used for automatically grasping and releasing the gate lifting shaft on the gate, and has a grab beam body. Both ends of the grab beam body are supported by a guide wheel mechanism in the gate slots on both sides of the gate. A clamping device capable of clamping the gate lifting shaft is installed on the grab beam body; the clamping device has a mounting seat fixed on the grab beam body, and a claw vise composed of a left claw and a right claw is installed at the lower end of the mounting seat. The upper parts of the left claw and the right claw are respectively rotatably installed on the mounting seat through a rotating shaft. A locking mechanism capable of locking the relative positions of the left claw and the right claw when the claw vise clamps and lifts the gate lifting shaft is installed on the mounting seat, and an unlocking mechanism capable of unlocking the locking mechanism is provided corresponding to the locking mechanism. The present invention is applicable to the field of water conservancy and hydropower.

Description

Technical Field

[0001] The present invention relates to a mechanical automatic grab beam device and its usage method, which is applicable to the field of water conservancy and hydropower. Background Art

[0002] An automatic grab beam is a special load-taking device for gantry hoists in hydropower stations and is widely used in water conservancy and hydropower projects. Especially when a mobile hoist is used to operate multiple gates, the frequent disassembly and assembly of the hanging shafts can be effectively avoided through the operation of the automatic grab beam. The performance of the automatic grab beam directly affects the reliability and working efficiency of the hoist.

[0003] The reliable alignment of the mechanical automatic grab beam and the automatic connection to the gate hanging shaft are the keys to grabbing the gate. When the gate is opened and closed, the connection process between the grab beam and the gate hanging shaft is completed underwater and cannot be directly observed. This requires the grab beam to be safely and reliably hooked and unhooked from the gate hanging shaft. Therefore, the reliability of the automatic grab beam that can automatically hook and unhook from the gate in deep water is very important. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the above problems, to provide a mechanical automatic grab beam device and its usage method with a simple structure, high safety and reliability, and convenient operation.

[0005] The technical solution adopted by the present invention is: a mechanical automatic grab beam device for automatically grabbing and releasing the gate hanging shaft on the gate, characterized in that: it has a grab beam body, both ends of the grab beam body are supported in the gate grooves on both sides of the gate through a guide wheel mechanism, and a clamping device capable of clamping the gate hanging shaft is installed on the grab beam body;

[0006] The clamping device has a mounting seat fixed on the grab beam body, a jaw clamp composed of a left jaw and a right jaw is installed at the lower end of the mounting seat, the upper parts of the left jaw and the right jaw are respectively rotatably installed on the mounting seat through a rotating shaft, a locking mechanism capable of locking the relative positions of the left jaw and the right jaw when the jaw clamp clamps and lifts the gate hanging shaft is installed on the mounting seat, and a unlocking mechanism corresponding to the locking mechanism and capable of unlocking the locking mechanism is provided;

[0007] An unlocking operating rod corresponding to the above unlocking mechanism is provided on the gate and can extend upward to touch the unlocking mechanism to unlock the locking mechanism when the gate approaches the bottom sill;

[0008] The locking mechanism has a locking wedge block located above the position between the left jaw and the right jaw, and the locking wedge block is installed on the mounting seat through a limit sleeve and can move up and down;

[0009] A left groove is formed on the upper part of the left jaw, and a right groove is formed on the upper part of the right jaw. When the left jaw and the right jaw rotate to the position of clamping the gate hanging shaft, a clamping groove corresponding to the locking wedge block is formed between the left groove and the right groove;

[0010] When a clamping groove is formed between the left groove and the right groove, the locking wedge can enter the clamping groove under its own gravity, thereby locking the relative positions of the left claw and the right claw.

[0011] The unlocking mechanism has a rotating rod rotatably connected to the upper end of the locking wedge through a horizontal rotating shaft. One end of the rotating rod is connected to the manual lifting mechanism upward through Chain Ⅰ. The other end of the rotating rod is provided with a balance weight and is connected to the grab beam body upward through Chain Ⅱ. On the rotating rod, a support member capable of supporting on the top end of the unlocking operating rod is provided on the unlocking operating rod corresponding to the lower part between the balance weight and the horizontal rotating shaft;

[0012] When the support member supports the top end of the unlocking operating rod, the balance weight at one end of the rotating rod can rotate downward around the support member under its own gravity, so as to lift the locking wedge at the other end of the rotating rod upward to unlock the locking mechanism.

[0013] The unlocking operating rod is vertically movably inserted into the vertical through hole of the gate, and the length of the unlocking operating rod is greater than the height of the gate.

[0014] A guide groove is formed in a circle on the guide wheel in the guide wheel device, and guide protruding strips adapted to the guide groove are formed in the gate grooves on both sides of the gate.

[0015] A using method of the mechanical automatic grab beam device is characterized in that:

[0016] a. Automatic hook-up:

[0017] Initially, the claw is in an open state under its own gravity;

[0018] When the grab beam device descends onto the gate, the gate hanging shaft enters the claw relatively upward and applies an upward pressure to the tails of the left and right claws in the claw jaws. The left and right claws rotate, and the tips of the left and right claws are joined together to form a clamping groove composed of the left groove on the left claw and the right groove on the right claw at the tails of the left and right claws;

[0019] The locking wedge in the locking mechanism moves downward under its own weight and enters the clamping groove;

[0020] When the grab beam device is lifted, the gate hanging shaft applies a downward pressure to the tips of the left and right claws in the claw jaws. Since the locking wedge is inserted into the clamping groove formed by the tails of the left and right claws, the left and right claws cannot rotate and can only clamp the locking wedge in the clamping groove;

[0021] b. Automatic unhooking:

[0022] The grab beam device is connected to the gate, the claw clamps the gate hanging shaft on the gate, and the gate hanging shaft applies a downward pressure to the tips of the left and right claws in the claw jaws;

[0023] The grab beam device and the gate descend. When the gate approaches the bottom sill, the unlocking operating rod on the bottom sill of the gate extends from the upper end of the gate, supports the support member in the unlocking mechanism, and causes the support member end of the rotating rod in the unlocking mechanism to rotate upward around the horizontal rotating shaft on the locking wedge block;

[0024] After the gate contacts the bottom sill, the grab beam device continues to descend until the gate hanging shaft no longer exerts a downward pressure on the left and right claw tips in the claw jaws, and the card slot releases the locking wedge block;

[0025] The end of the rotating rod in the unlocking mechanism away from the locking wedge block rotates downward around the support member under the gravity of the counterweight, and pulls the locking wedge block connected to the other end of the rotating rod upward from the card slot;

[0026] Lift the grab beam device. The gate hanging shaft exerts a downward pressure on the left and right claw tips in the claw jaws. The left and right claws rotate, the claw jaws open, and the grab beam device disengages from the gate hanging shaft; after the support member separates from the unlocking operating rod, the locking wedge block moves downward under its own weight and reaches the claw jaws.

[0027] The beneficial effects of the present invention are as follows: Through the cooperation of the claw jaws and the locking mechanism, the present invention realizes automatic hooking after the gate hanging shaft enters the claw jaws. Through the cooperation of the unlocking mechanism and the unlocking operating rod, automatic unlocking is realized. Thus, it can be realized that the mechanical grab beam can automatically hook and unhook with the gate hanging shaft under the condition that the water depth cannot be observed.

[0028] In the present invention, the locking mechanism cooperates with the card slot formed between the locking wedge block and the left and right claws. When downward pressure is applied to the left and right claw tips, the locking wedge block blocks the rotation positions of the left and right claws, making the left and right claws unable to rotate, thereby realizing the clamping of the gate hanging shaft by the claw jaws.

[0029] In the present invention, the unlocking mechanism is composed of a rotating rod rotatably installed on the locking wedge block, combined with a support member and a counterweight. When the gate approaches the bottom sill, the locking mechanism can be unlocked under the action of the unlocking operating rod, and the left and right claws can be restored to a rotatable state, thereby realizing automatic unlocking.

[0030] Compared with ordinary grab beams, the present invention has the advantages of simple structure, reliability, convenient installation, simple operation, and flexible layout, greatly improving the reliability of the grab beam operation of the mobile hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the embodiment.

[0032] Figure 2 It is a schematic diagram of the automatic hooking operation in the embodiment.

[0033] Figure 3 It is a schematic diagram of the automatic unhooking operation in the embodiment.

[0034] Figure 4 Schematic diagram of the manual decoupling operation in the embodiment.

[0035] In the figure: 1. Grabbing beam body; 2. Guide wheel; 3. Gate; 4. Gate hanging shaft; 5. Unlocking operating rod; 6. Left claw; 6-1. Left groove; 7. Right claw; 7-1. Right groove; 8. Manual lifting mechanism; 9. Locking wedge; 10. Rotating rod; 11. Counterweight; 12. Support; 13. Chain Ⅰ; 14. Chain Ⅱ; 15. Mounting seat; 16. Limiting sleeve Specific implementation mode

[0036] This embodiment is a mechanical automatic grabbing beam device, which has a grabbing beam body. Both ends of the grabbing beam body are supported by a guide wheel mechanism in the gate grooves on both sides of the gate. The grabbing beam body is generally designed as a box-shaped or I-shaped structure, and a total of 4 guide wheels are arranged at both ends. A guide groove is made on the guide wheel, and a guide raised strip adapted to the guide groove is made in the gate grooves on both sides of the gate. During operation, the guide wheel is embedded in the guide raised strip of the gate groove.

[0037] In this example, a clamping device is installed on the grabbing beam body, and the gate hanging shaft on the gate can be clamped through the clamping device. In this embodiment, the clamping device includes a mounting seat, a claw, a locking mechanism and an unlocking mechanism. Among them, the mounting seat is fixed on the grabbing beam body, and the claw is composed of a left claw and a right claw. The upper parts of the left claw and the right claw are rotatably installed on the mounting seat through a rotating shaft respectively.

[0038] In this embodiment, the locking mechanism has a locking wedge located above the middle position between the left claw and the right claw. The locking wedge is installed on the mounting seat through a limiting sleeve and can move up and down. In this example, a left groove is made on the upper part of the left claw, and a right groove is made on the upper part of the right claw. When the left claw and the right claw rotate to the point where the lower tip of the left claw is close to the lower tip of the right claw, the left groove and the right groove after the rotation of the left and right claws form a clamping groove, and the position of the clamping groove corresponds to the locking wedge above. After the clamping groove is formed, the locking wedge will move down into the clamping groove under the action of its own weight, thereby locking the relative positions of the left claw and the right claw and making the left claw and the right claw unable to rotate.

[0039] In this embodiment, the unlocking mechanism has a rotating rod rotatably connected to the upper end of the locking wedge through a horizontal rotating shaft. One end of the rotating rod is connected upward to the manual lifting mechanism through Chain Ⅰ, and a counterweight is provided at the other end of the rotating rod and is connected upward to the grabbing beam body through Chain Ⅱ. A support perpendicular to the rotating rod is provided between the rotating rod, the counterweight and the horizontal rotating shaft, and the support can adjust the distance of its relative downward extension from the rotating rod (such as a screw vertically threadedly connected to the threaded through hole on the rotating rod).

[0040] In this example, an unlocking operating rod corresponding to the position of the support member in the upper unlocking mechanism is provided on the gate, and the unlocking operating rod can extend upward from the upper end of the gate when the gate approaches the bottom sill to support the support member in the unlocking mechanism. The unlocking operating rod can be vertically moved and inserted into the vertical through hole of the gate, and the length of the unlocking operating rod is greater than the height of the gate.

[0041] When the support member is supported on the top of the unlocking operating rod, the counterweight at one end of the rotating rod can rotate downward around the support member under its own gravity, thereby lifting the locking wedge at the other end of the rotating rod upward to unlock the locking mechanism.

[0042] The mechanical automatic beam grabbing device in this embodiment can realize automatic hooking, automatic unhooking and manual unhooking, wherein the automatic hooking method of the mechanical automatic beam grabbing device is as follows:

[0043] In the initial state, the claw clamp is in an open state under the action of the left claw and the right claw's own weight, the locking wedge is placed on the left claw and the right claw under the action of its own weight, and the balance weight end of the rotating rod moves downward around the horizontal rotating shaft above the locking wedge under the action of the balance weight until the chain II is straightened;

[0044] Raise the position of the support on the rotating rod to prevent the support from contacting the unlocking lever below;

[0045] When the grab beam device descends onto the gate, the gate hanging shaft at the upper end of the gate moves upward relatively and enters the claw clamp and applies upward pressure to the tail of the left and right claws in the claw clamp jaws. The left and right claws rotate around the rotating shaft, and the tips of the left and right claws are spliced. The left groove and the right groove after the left and right claws rotate form a slot corresponding to the upper locking wedge block;

[0046] The locking wedge moves downward under the action of its own weight and falls into the slot formed between the left and right claws;

[0047] Lift the grab beam device, and the gate hanging shaft moves downward relatively, applying downward pressure to the tips of the left and right claws in the jaws of the claw clamp. Since the locking wedges are inserted into the grooves formed at the tails of the left and right claws, the left and right claws cannot rotate, and only the left groove and the right groove can clamp the locking wedges, so that the gate hanging shaft cannot be separated from the claw clamp, realizing automatic hooking.

[0048] The automatic unhooking method of the mechanical automatic beam grabbing device in this embodiment is as follows:

[0049] Lower the support on the rotating rod to ensure that the support contacts the top of the unlocking lever below;

[0050] The grab beam device is connected to the gate, the claw clamp clamps the gate hanging shaft on the gate, the gate hanging shaft applies downward pressure to the left and right claw tips in the claw clamp jaws, and the left groove and the right groove on the upper part of the left and right claws clamp and lock the wedge;

[0051] The gripper beam device and the gate descend. When the gate approaches the bottom sill, the unlocking operating rod on the bottom sill of the gate extends from the upper end of the gate, supporting the support member in the unlocking mechanism, causing the support member end of the rotating rod in the unlocking mechanism to rotate upward around the horizontal rotating shaft on the locking wedge block;

[0052] After the gate contacts the bottom sill, the gripper beam device continues to descend until the gate suspension shaft no longer exerts a downward pressure on the left and right claw tips in the jaw of the gripper, and the left and right grooves on the upper parts of the left and right claws release the locking wedge block;

[0053] The end of the rotating rod in the unlocking mechanism away from the locking wedge block rotates downward around the contact point of the support member with the unlocking operating rod under the gravity of the counterweight, pulling the locking wedge block connected to the other end of the rotating rod upward from the card slot;

[0054] Lift the gripper beam device. The gate suspension shaft exerts a downward pressure on the left and right claw tips in the jaw of the gripper. The left and right claws rotate, the gripper opens, and the gripper beam device disengages from the gate suspension shaft; after the support member separates from the unlocking operating rod, the locking wedge block moves downward under its own weight and is placed on the left and right claws, returning to the initial state.

[0055] The manual decoupling method of the mechanical automatic gripper beam device in this embodiment is as follows: Lift chain Ⅰ upward through the manual lifting mechanism, causing the chain Ⅰ end of the rotating rod to rotate upward around the connection point of the rotating rod and chain Ⅱ, rotating the locking wedge block upward and pulling it out from the card slot. After the locking wedge block is pulled out from the card slot, the locking mechanism is unlocked, and the left and right claws can rotate and the gripper can be opened.

[0056] The above embodiments are only used to explain the inventive concept of the present invention, rather than limiting the protection scope of the rights of the present invention. Any non-substantive modification made to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A mechanical automatic grab beam device for automatically grabbing and releasing the gate lifting shaft (4) on the gate, characterized in that: It has a grab beam body (1), and both ends of the grab beam body (1) are supported in the gate grooves on both sides of the gate (3) through guide wheel mechanisms. A clamping device capable of clamping the gate lifting shaft (4) is installed on the grab beam body (1). The clamping device has a mounting seat (15) fixed on the grab beam body (1). A claw vise composed of a left claw (6) and a right claw (7) is installed at the lower end of the mounting seat (15). The upper parts of the left claw (6) and the right claw (7) are respectively rotatably installed on the mounting seat (15) through rotating shafts. A locking mechanism capable of locking the relative positions of the left claw (6) and the right claw (7) when the claw vise clamps and lifts the gate lifting shaft (4) is installed on the mounting seat (15). An unlocking mechanism corresponding to the locking mechanism is provided to unlock the locking mechanism. An unlocking operation rod (5) corresponding to the above unlocking mechanism is provided on the gate (3), and when the gate approaches the bottom sill, it can extend upward to touch the unlocking mechanism to unlock the locking mechanism. The locking mechanism has a locking wedge block (9) located above the position between the left claw (6) and the right claw (7). The locking wedge block (9) is installed on the mounting seat (15) through a limit sleeve (8) and can move up and down. A left groove (6-1) is formed on the upper part of the left claw (6), and a right groove (7-1) is formed on the upper part of the right claw (7). When the left claw (6) and the right claw (7) rotate to the position of clamping the gate lifting shaft (4), a clamping groove corresponding to the locking wedge block (9) is formed between the left groove (6-1) and the right groove (7-1). When a clamping groove is formed between the left groove (6-1) and the right groove (7-1), the locking wedge block (9) can enter the clamping groove under the action of its own gravity, thereby locking the relative positions of the left claw (6) and the right claw (7). The unlocking mechanism has a rotating rod (10) rotatably connected to the upper end of the locking wedge block (9) through a horizontal rotating shaft. One end of the rotating rod (10) is connected upward to a manual lifting mechanism (8) through a chain I (13). A counterweight (11) is provided at the other end of the rotating rod (10) and is connected upward to the grab beam body (1) through a chain II (14). A support member (12) capable of supporting on the top end of the unlocking operation rod (5) is provided on the rotating rod (10) corresponding to the unlocking operation rod (5) below between the counterweight (11) and the horizontal rotating shaft. When the support member (12) supports on the top end of the unlocking operation rod (5), the counterweight (11) at one end of the rotating rod (10) can rotate downward around the support member (12) under the action of its own gravity, thereby being able to lift the locking wedge block (9) at the other end of the rotating rod (10) upward to unlock the locking mechanism. The unlocking operation rod (5) is vertically inserted into the vertical through hole of the gate, and the length of the unlocking operation rod (5) is greater than the height of the gate.

2. The mechanical automatic grab beam device according to claim 1, wherein: A guide groove is formed on the guide wheel (2) in the guide wheel device, and a guide rib adapted to the guide groove is formed in the gate grooves on both sides of the gate.

3. A method for using the mechanical automatic grab beam device according to any one of claims 1 to 2, characterized in that: a. Automatic hook-up: Initially, the claw vise is in an open state under the action of its own gravity. When the grab beam device descends onto the gate, the gate lifting shaft (4) moves relatively upward into the claw tongs and applies an upward pressure to the tails of the left and right claws within the claw tong jaws. The left and right claws rotate, and the tips of the left and right claws merge to form a clamping groove at the tails of the left and right claws, which is composed of the left groove (6-1) on the left claw (6) and the right groove (7-1) on the right claw (7). The locking wedge block (9) in the locking mechanism moves downward under its own weight into the clamping groove. When the grab beam device is lifted, the gate lifting shaft (4) applies a downward pressure to the tips of the left and right claws within the claw tong jaws. Since the locking wedge block (9) is inserted into the clamping groove formed by the tails of the left and right claws, the left and right claws cannot rotate and can only clamp the locking wedge block (9) within the clamping groove. b. Automatic unhooking: The grab beam device is connected to the gate, and the claw tongs grip the gate lifting shaft (4) on the gate. The gate lifting shaft (4) applies a downward pressure to the tips of the left and right claws within the claw tong jaws. The grab beam device and the gate descend. When the gate approaches the bottom sill, the unlocking operating rod (5) on the gate bottom sill extends from the upper end of the gate and supports the support member (12) in the unlocking mechanism, causing the support member (12) end of the rotating rod (10) in the unlocking mechanism to rotate upward around the horizontal rotating shaft on the locking wedge block (9). After the gate contacts the bottom sill, the grab beam device continues to descend until the gate lifting shaft (4) no longer applies a downward pressure to the tips of the left and right claws within the claw tong jaws, and the clamping groove releases the locking wedge block (9). The end of the rotating rod (10) in the unlocking mechanism away from the locking wedge block (9) rotates downward around the support member (12) under the gravity of the counterweight (11), pulling the locking wedge block (9) connected to the other end of the rotating rod (10) upward out of the clamping groove. Lift the grab beam device. The gate lifting shaft (4) applies a downward pressure to the tips of the left and right claws within the claw tong jaws. The left and right claws rotate, the claw tongs open, and the grab beam device disengages from the gate lifting shaft (4). After the support member (12) separates from the unlocking operating rod (5), the locking wedge block (9) moves downward under its own weight onto the claw tongs.

Images