A gate reverse pre-tightening mechanical device

Abstract

The present invention discloses a mechanical device for reverse pre-tightening of a gate, which includes a tie rod, a guide shaft, a lever, a weight, a connecting rod, an eccentric wheel, and a support hinge; there are two guide shafts in total, which are arranged in parallel along the vertical direction, and the guide shafts are fixedly connected to the gate leaf as a whole; the tie rod is connected and installed on the gate leaf through the guide shaft, the upper part of the tie rod is connected to the hoist, and the weight is fixedly installed at the bottom of the tie rod; the support hinge is fixedly installed on the gate leaf, there are two sets of support hinges in total, the lever is installed on the lever support hinge, and the eccentric wheel is installed on the side of the gate leaf through the eccentric wheel support hinge; the connecting rod is located on the side of the gate leaf, one end of the lever is connected to the middle part of the tie rod, the other end of the lever is connected to the upper end of the connecting rod, and the lower end of the connecting rod is connected to the eccentric wheel. The present invention can reduce the gap between the gate and the gate slot after the gate is closed, without the need to additionally add power equipment, and can be applied to gates with high water-stopping requirements and weak operation and management capabilities.

Description

Technical Field

[0001] The present invention relates to a pre-tightening device, and more particularly to a mechanical device for reverse pre-tightening of a gate. Background Art

[0002] At present, the water seal device of a general plane gate mainly uses the upstream water pressure to press the gate water seal rubber against the downstream gate slot embedment to achieve the effect of sealing and water stoppage. When the water level upstream of the gate is high, the water pressure acting on the gate is sufficient to press the gate tightly against the gate slot embedment, and the water stoppage effect is good; when the water level upstream of the gate is low, the water pressure acting on the gate is not sufficient to press the gate against the gate slot embedment, and the water seal effect is poor.

[0003] If the water stoppage effect of the working gate is poor, it will cause waste of water resources; if the water stoppage effect of the maintenance gate is poor, it will increase the drainage workload during the project maintenance and increase the safety risk of the maintenance work. For plane gates with high water stoppage requirements, rollers or sliders with reverse pre-compression are usually used to improve the guarantee degree of the water seal pre-compression amount of the gate. For those with particularly high requirements, a hydraulic jack cylinder can be set to ensure the water seal compression amount when the gate blocks water. The reverse rollers and reverse sliders are limited by the high installation accuracy requirements and it is difficult to achieve an ideal effect. Although the hydraulic jack cylinder can achieve a relatively ideal effect, the equipment cost is high, the maintenance workload is large, and the reliability of the electric control equipment decreases in a humid environment. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art and provides a mechanical device for reverse pre-tightening of a gate. The whole system is a pure mechanical device, which can achieve the effect of reverse pre-tightening after the gate is fully closed without adding power supply and electrical equipment, nor manual operation.

[0005] The technical solution adopted by the present invention is:

[0006] A reverse pre-tightening mechanical device for a gate, comprising a pull rod, a guide shaft, a lever, a weight, a connecting rod, an eccentric wheel, and a support hinge. There are two guide shafts in total, which are arranged in parallel along the vertical direction, and the two guide shafts are fixedly connected to the gate leaf as a whole; the pull rod is connected and installed on the gate leaf through the guide shaft, the upper part of the pull rod is connected to the hoist, and the weight is fixedly installed at the bottom of the pull rod; the support hinge is fixedly installed on the gate leaf, and there are two sets of support hinges in total, including a lever support hinge and an eccentric wheel support hinge, which are respectively used for installing the lever and the eccentric wheel; the lever is installed on the lever support hinge and can rotate around the lever support hinge; the connecting rod is located on the side of the gate leaf, and the eccentric wheel is installed on the side of the gate leaf through the eccentric wheel support hinge; one end of the lever is connected to the middle of the pull rod, the other end of the lever is connected to the upper end of the connecting rod, and the lower end of the connecting rod is connected to the eccentric wheel. After the gate is lowered in place, the hoist continues to move downward for a certain distance, and the pull rod continues to move downward under the action of the weight; the end of the lever connected to the pull rod moves downward together with the pull rod, the lever rotates around the lever support hinge, and the other end of the lever moves upward around the lever support hinge, pulling the connecting rod upward; when the connecting rod moves upward, the eccentric wheel rotates, and the height of the outer edge of the eccentric wheel above the gate gradually increases during rotation, and the gap between the outer edge of the eccentric wheel and the gate slot gradually decreases, so as to push the gate to be pressed against the downstream surface.

[0007] Further, a long hole is provided on the pull rod, the length of the long hole is longer than the distance between the two guide shafts, and the two guide shafts pass through the long hole, and the pull rod can move in the up and down directions.

[0008] Further, the eccentric wheel includes a movable wheel and a fixed pad. The fixed pad is installed on the gate leaf. There is an eccentricity between the rotation center and the outer edge curvature center of the movable wheel. The inner edge curvature center of the movable wheel is concentric with the curvature center of the fixed pad and the rotation center of the movable wheel. The inner edge of the movable wheel is tangent to the outer edge of the fixed pad, and the movable wheel is connected to the lower end of the connecting rod. The center of the eccentric wheel support hinge is the rotation center of the movable wheel; there is a distance offset between the rotation center and the arc center of the outer edge of the movable wheel, and the rotation of the eccentric wheel changes the distance from the highest point of the wheel rim to the center of the support hinge.

[0009] Further, the weight can pry the eccentric wheel to rotate under the action of the lever.

[0010] The operating principle of the present invention is as follows: During the closing process of the gate, the hoist pulls up the tie rod upward. The end of the lever far from the tie rod is pressed downward, and then the eccentric wheel is pressed downward through the connecting rod. The most prominent point on the outer edge of the eccentric wheel is lower than the most prominent point of the gate, and the gap between the gate and the gate slot can ensure the smooth fall of the gate. After the gate is completely closed, the hoist does not provide pulling force, and the weight drives the tie rod to move downward. Then, the connecting rod is lifted through the lever, and the connecting rod drives the eccentric wheel to rotate. The outer edge of the eccentric wheel bulges outward, presses tightly against the reverse rail of the gate slot, and pushes the gate downstream slightly to pre-tighten the gate. When opening the gate, the hoist pulls upward, and the force-bearing situation of the entire pre-tightening device is the same as that during the closing process of the gate. The outer edge of the eccentric wheel is at the same height as the reverse support point of the gate, and the gap between the gate and the gate slot can ensure the smooth opening of the gate.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. The device can reduce the gap between the gate and the gate slot after the gate is closed.

[0013] 2. The device does not require new power equipment for the gate.

[0014] 3. The device does not change the opening and closing operation procedures of the gate.

[0015] 4. The gate equipment is simple and has low maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the upstream view of the present invention;

[0017] Figure 2 is the side view of the present invention.

[0018] In the figure: 1 - gate leaf; 2 - lever hinge; 3 - lever; 4 - hoist; 5 - tie rod; 5a - long hole; 6 - guide shaft; 7 - weight; 8 - connecting rod; 9 - eccentric wheel; 9a - movable wheel; 9b - fixed pad; 10 - eccentric wheel hinge. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following further describes the present invention in detail with reference to the drawings:

[0020] As shown in the attached Figure 1 、 Figure 2As shown in the figure, a reverse pre-tightening mechanical device for a gate of the present invention includes a lever hinge 2, a lever 3, a pull rod 5, a guide shaft 6, a weight 7, a connecting rod 8, an eccentric wheel 9, and an eccentric wheel hinge 10; a long hole 5a is provided on the pull rod 5; the guide shaft 6 passes through the long hole 5a of the pull rod 5 and is connected to the gate leaf 1, and the guide shaft 6 and the pull rod 5 can move relative to each other; the lever 3 is hinged to the lever hinge 2 and can rotate around the lever hinge 2. One end of the lever 3 is connected to the pull rod 5, and the other end of the lever 3 is connected to the upper end of the connecting rod 8; the weight 7 is fixed to the bottom of the pull rod 5; the eccentric wheel 9 includes a movable wheel 9a and a fixed pad 9b. The fixed pad 9b is installed on the gate leaf 1. There is an eccentricity between the rotation center and the outer edge curvature center of the movable wheel 9a. The inner edge curvature center of the movable wheel 9a is concentric with the curvature center of the fixed pad 9b and the rotation center of the movable wheel 9a. The inner edge of the movable wheel 9a is tangent to the outer edge of the fixed pad 9b. The movable wheel 9a is connected to the lower end of the connecting rod 8; the eccentric wheel hinge 10 is installed on the side of the gate, and the center of the eccentric wheel hinge 10 is the rotation center of the movable wheel 9a.

[0021] During the closing process of the gate, the hoist 4 pulls up the pull rod 5. The lever 3 rotates around the lever hinge 2. The end of the lever 3 far from the pull rod 5 is pressed downward. The movable wheel 9a of the eccentric wheel 9 is rotated downward around the eccentric wheel hinge 10 through the connecting rod 8. The outer edge of the eccentric wheel 9 is reduced to be level with the reverse support point of the gate leaf 1. The gap between the gate and the gate slot can ensure the smooth falling of the gate; after the gate is completely closed, the hoist 4 does not provide pulling force. The weight 7 drives the pull rod 5 to move downward, and then the connecting rod 8 is lifted through the lever 3. The connecting rod 8 drives the movable wheel 9a of the eccentric wheel 9 to rotate. The outer edge of the movable wheel 9a bulges outward, presses tightly against the reverse rail of the gate slot, and pushes the gate downstream a little, reducing the gap between the gate and the gate slot to pre-tighten the gate; when opening the gate, the hoist 4 pulls up. The force-bearing situation of the whole pre-tightening device is the same as that during the closing process. The outer edge of the eccentric wheel 9 is level with the reverse support point of the gate. The gap between the gate and the gate slot can ensure the smooth opening of the gate.

[0022] After the gate is completely closed, the pre-tightening device uses gravity to reduce the gap between the gate leaf 1 and the gate slot, and there is no need to newly add power equipment to the gate; during the opening and closing process of the gate, the opening and closing procedures are the same as those of a conventional gate. All components of the whole set are simple in structure and have low maintenance requirements.

[0023] The above embodiments describe the present invention in conjunction with the accompanying drawings, but it should not be construed as limiting the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the technical solutions obtained by equivalent substitution or equivalent transformation methods all fall within the protection scope of the present invention.

Claims

1. A mechanical device for reverse pre-tightening of a gate, characterized in that: it includes a pull rod, a guide shaft, a lever, a weight, a connecting rod, an eccentric wheel, and a support hinge; there are two guide shafts in total, arranged parallel to each other in the vertical direction, and the two guide shafts are fixedly connected to the gate leaf as a whole; the pull rod is connected and installed on the gate leaf through the guide shaft, the upper part of the pull rod is connected to the hoist, and the weight is fixedly installed at the bottom of the pull rod; the support hinge is fixedly installed on the gate leaf, and there are two sets of support hinges in total, including a lever support hinge and an eccentric wheel support hinge, which are respectively used for installing the lever and the eccentric wheel; the lever is installed on the lever support hinge and can rotate around the lever support hinge; the eccentric wheel is installed on the side of the gate through the eccentric wheel support hinge; the connecting rod is located on the side of the gate, one end of the lever is connected to the middle of the pull rod, the other end of the lever is connected to the upper end of the connecting rod, and the lower end of the connecting rod is connected to the eccentric wheel; a long hole is provided on the pull rod, the length of the long hole is longer than the distance between the two guide shafts, the two guide shafts pass through the long hole, and the pull rod can move relative to the guide shaft in the up and down directions.

2. The mechanical device for reverse pre-tightening of a gate according to claim 1, characterized in that: the eccentric wheel includes a movable wheel and a fixed pad, the fixed pad is installed on the gate leaf, there is an eccentricity between the rotation center and the outer edge curvature center of the movable wheel, the inner edge curvature center of the movable wheel is concentric with the curvature center of the fixed pad and the rotation center of the movable wheel, the inner edge of the movable wheel is tangent to the outer edge of the fixed pad, and the movable wheel is connected to the lower end of the connecting rod; the center of the eccentric wheel support hinge is the rotation center of the movable wheel.

3. The mechanical device for reverse pre-tightening of a gate according to claim 1, characterized in that: the weight can pry the eccentric wheel to rotate under the action of the lever.

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