A gate limiting device

Abstract

The utility model relates to water conservancy engineering equipment technical field especially relates to a gate limiting device, including limit control mechanism and two trigger buffer mechanism, limit control mechanism includes installation box body and sets up the guide rod in installation box body, opens door limit switch, closes door limit switch, the first spring cavity cover is fixed in installation box body, the guide rod sliding is inserted in the first spring cavity cover, and the guide rod installs the first piston block with the stroke switch block, both sides of first piston block all are fixed with first spring, and first piston block, first spring all are located in the first spring cavity cover, two trigger buffer mechanisms are located limit control mechanism's both sides, and trigger buffer mechanism is located the moving path on the guide rod. The device is through the guide rod and promotes the stroke switch block's removal accuracy, and by the cooperation of stroke switch block and limit switch, will be in control error stability control within 5mm, greatly improved the control accuracy and response accuracy of opening and closing.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering equipment technology, and in particular to a gate limiting device. Background Technology

[0002] In water conservancy projects, ports and wharves, municipal water supply and drainage, etc., gates are key equipment for controlling water flow and ensuring the safety of facilities. Their operational stability and position control accuracy are directly related to the safety and efficient operation of the entire water conservancy system.

[0003] Traditional gate limit devices mostly employ a single trigger mechanism design. These devices rely on physical contact between a single metal contact and the gate's trigger element to achieve limit movement. However, due to vibrations and impacts during gate operation, the contact is prone to wear and deformation, resulting in stroke control errors generally exceeding ±15mm. When the gate overtravels, it is susceptible to hard collisions with the gate housing's stop structure, causing gate frame warping, overload damage to the hoist gearbox, and even tearing of the gate's sealing rubber strip, leading to water leakage and other safety accidents. These devices suffer from low limit accuracy, delayed trigger response, and insufficient reliability. Therefore, we propose a gate limit device to address these issues. Utility Model Content

[0004] This invention addresses the shortcomings of existing gate limiting devices, such as low limiting accuracy, delayed trigger response, and insufficient reliability, by providing a gate limiting device.

[0005] This utility model is achieved through the following technical solution:

[0006] A gate limiting device includes a limit control mechanism and two trigger buffer mechanisms. The limit control mechanism includes a mounting box and a guide rod, an opening limit switch, and a closing limit switch disposed in the mounting box. A first spring cavity is fixed in the mounting box. The guide rod is slidably inserted into the first spring cavity, and both ends of the guide rod penetrate the mounting box. A first piston block and a limit switch block are mounted on the guide rod. A first spring is fixed on both sides of the first piston block, and the first piston block and the first spring are both located in the first spring cavity.

[0007] The door opening limit switch and the door closing limit switch are located on both sides of the aforementioned limit switch block;

[0008] The two trigger buffer mechanisms are located on both sides of the limit control mechanism, and the trigger buffer mechanisms are located on the moving path of the guide rod.

[0009] In a preferred embodiment of this utility model, guide sleeves are fixed at both ends of the mounting box, and the guide rod is inserted into the guide sleeve and slides in cooperation with the guide sleeve to improve the stability of the guide rod when sliding.

[0010] In a preferred embodiment of the present invention, the first spring cavity sleeve is open at both ends, and a first cover plate is threaded to both ends of the first spring cavity sleeve. The guide rod passes through the first cover plate and slides with the first cover plate. The first spring can be replaced by disassembling the first cover plate.

[0011] In a preferred embodiment of this utility model, both ends of the guide rod are threaded with fine-tuning nuts. The fine-tuning nuts can be snap-fitted or threaded, making it easy to replace the fine-tuning nuts after wear.

[0012] In a preferred embodiment of the present invention, the triggering buffer mechanism includes a second spring cavity and a limiting rod slidably inserted in the second spring cavity. One end of the limiting rod is fixed with a contact block, and a second piston block is fixed on the limiting rod. A second spring is installed on the side of the second piston block away from the contact block. The second spring and the second piston block are both located in the second spring cavity. The second piston block is pushed by the second spring, so that the limiting rod is fixed in the second spring cavity under normal conditions.

[0013] In a preferred embodiment of the present invention, the two ends of the second spring cavity sleeve are open, and the two ends of the second spring cavity sleeve are threaded with a second cover plate. The limiting rod passes through the second cover plate and slides with the second cover plate. The detachable second cover plate facilitates the replacement of the internal second spring.

[0014] In a preferred embodiment of this utility model, an adjusting nut is threaded to the end of the limiting rod away from the contact block. Through the cooperation of the adjusting nut and the second spring, the limiting rod is installed in the second spring cavity. At the same time, the second spring can also buffer the guide rod after triggering the limit switch and buffer the kinetic energy at the end of the gate opening and closing.

[0015] In a preferred embodiment of this utility model, the spring constant of the second spring is greater than that of the first spring, so that when the guide rod contacts the contact block, the first spring will be compressed and deformed.

[0016] The beneficial effects of this utility model are:

[0017] 1. This device improves the movement accuracy of the limit switch block by using a guide rod, and through the cooperation of the limit switch block and the limit switch, the stroke control error is stably controlled within ±5mm, which greatly improves the control accuracy and response accuracy of opening and closing.

[0018] 2. This device can absorb the kinetic energy at the end of the opening and closing of the gate through the buffering of the first and second springs, avoiding the hard-hitting contact in the traditional structure, and thus avoiding equipment damage problems such as gate frame warping and seal tearing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of a gate limiting device according to the present invention;

[0020] Figure 2 This is a cross-sectional view of the limit control mechanism in a gate limit device according to the present invention.

[0021] Figure 3 This is a cross-sectional view of the trigger buffer mechanism in a gate limiting device according to the present invention.

[0022] In the diagram: 1. Limit control mechanism; 11. Mounting housing; 12. First spring sleeve; 13. Guide rod; 14. First piston block; 15. First spring; 16. First cover plate; 17. Limit switch block; 18. Door closing limit switch; 19. Door opening limit switch; 110. Fine-tuning nut; 2. Trigger buffer mechanism; 21. Second spring sleeve; 22. Limit rod; 23. Second cover plate; 24. Second spring; 25. Contact block; 26. Adjusting nut; 27. Second piston block. Detailed Implementation

[0023] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0024] like Figure 1-3 The gate limiting device shown includes a limit control mechanism 1 and two trigger buffer mechanisms 2;

[0025] The limit control mechanism 1 includes a mounting box 11, in which a first spring sleeve 12 is fixed. A guide rod 13 is inserted into the first spring sleeve 12 and slides with the first spring sleeve 12. A first piston block 14 and a limit switch block 17 are mounted on the guide rod 13. A first spring 15 is fixed on both sides of the first piston block 14 and the first piston block 14 and the first spring 15 are both located in the first spring sleeve 12. The two ends of the first spring sleeve 12 are open and both ends of the first spring sleeve 12 are threaded with a first cover plate 16. The guide rod 13 passes through the first cover plate 16 and slides with the first cover plate 16. The first spring 15 can be replaced by disassembling the first cover plate 16.

[0026] Secondly, guide sleeves are fixed at both ends of the mounting housing 11, and the two ends of the guide rod 13 are inserted into the guide sleeves and slide in cooperation with the guide sleeves. The two ends of the guide rod 13 extend to the outside of the mounting housing 11. The guide sleeves improve the stability of the guide rod 13 when sliding. At the same time, fine-tuning nuts 110 are threaded to both ends of the guide rod 13. The setting of fine-tuning nuts 110 can firstly avoid wear at the end of the guide rod 13 after long-term use, and the detachable connection makes it easy to replace the fine-tuning nuts 110 after wear, thereby maintaining control accuracy. Secondly, by rotating the fine-tuning nuts 110, the contact position of the guide rod 13 can be finely adjusted, so that the guide rod 13 can better contact the trigger buffer mechanism 2 and better trigger the limit switch, further maintaining control accuracy.

[0027] The mounting box 11 is also equipped with four limit switches. The two on the left are door closing limit switches 18, and the two on the right are door opening limit switches 19. The door opening limit switches 19 and door closing limit switches 18 are located on both sides of the aforementioned limit switch block 17.

[0028] Specifically, the trigger buffer mechanism 2 includes a second spring cavity 21 and a limiting rod 22 slidably inserted in the second spring cavity 21. One end of the limiting rod 22 is fixed with a contact block 25, and a second piston block 27 is fixed on the limiting rod 22. A second spring 24 is installed on the side of the second piston block 27 away from the contact block 25. The stiffness coefficient of the second spring 24 is greater than that of the first spring 15, so that when the guide rod 13 contacts the contact block 25, the first spring 15 will be compressed and deformed, while the second spring 24 remains unchanged. The second spring 24 and the second piston block 27 are both located in the second spring cavity 21. The second spring 24 pushes the second piston block 27, so that the limiting rod 22 is fixed in the second spring cavity 21 under normal conditions. The two ends of the second spring cavity 21 are open, and a second cover plate 23 is threadedly installed on both ends of the second spring cavity 21. The limiting rod 22 passes through the second cover plate 23 and slides with the second cover plate 23. The second spring 24 can be replaced by using the detachable second cover plate 23.

[0029] Furthermore, the end of the limit rod 22 away from the contact block 25 is threaded with an adjusting nut 26. Through the cooperation of the adjusting nut 26 and the second spring 24, the limit rod 22 is installed in the second spring cavity sleeve 21. At the same time, the second spring 24 can also buffer the guide rod 13 after the limit switch is triggered, and buffer the kinetic energy at the end of the opening and closing of the gate.

[0030] Two trigger buffer mechanisms 2 are located on both sides of the limit control mechanism 1, and the trigger buffer mechanisms 2 are located on the moving path of the guide rod 13;

[0031] In this embodiment, two trigger buffer mechanisms 2 are respectively installed at the top and bottom ends of the horizontal sliding gate, with the side being the trigger plane and facing the guide rod 13 in the limit control mechanism 1. The trigger buffer mechanism 2 moves with the horizontal sliding gate.

[0032] The limit control mechanism 1 is installed horizontally and fixed inside the gate housing at the intersection of the horizontal sliding gate and the river channel via a bracket;

[0033] When the gate is opened, when the gate is opened to the position close to the opening position, the contact block 25 in the trigger buffer mechanism 2 at the gate head touches the guide rod 13, causing the guide rod 13 to move to the right and compress the first spring 15 in the first spring cavity sleeve 12. At the same time, it drives the limit switch block 17 to move to the right, triggering the right opening limit switch 19, so that the gate opening and closing equipment stops running and the gate opening stops.

[0034] When the gate is closed, firstly, under the elastic force of the first spring 15 in the first spring cavity 12, the guide rod 13 returns to its original state. Secondly, when the gate is closed to the near-closed position, the contact block 25 in the trigger buffer mechanism 2 at the gate tail touches the guide rod 13, causing the guide rod 13 to move to the left and compress the first spring 15 in the first spring cavity 12, which drives the limit switch block 17 to move to the left, triggering the left-side closing limit switch 18, causing the gate opening and closing equipment to stop operating, and the gate closing to stop.

[0035] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0036] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A gate limiting device, comprising a limit control mechanism (1) and two trigger buffer mechanisms (2), characterized in that: The limit control mechanism (1) includes a mounting box (11) and a guide rod (13), a door opening limit switch (19), and a door closing limit switch (18) disposed in the mounting box (11). A first spring cavity sleeve (12) is fixed inside the mounting box (11). The guide rod (13) is slidably inserted into the first spring cavity sleeve (12), and both ends of the guide rod (13) penetrate the mounting box (11). A first piston block (14) and a limit switch block (17) are installed on the guide rod (13). A first spring (15) is fixed on both sides of the first piston block (14), and the first piston block (14) and the first spring (15) are both located inside the first spring cavity sleeve (12). The door opening limit switch (19) and the door closing limit switch (18) are located on both sides of the aforementioned limit switch block (17); The two trigger buffer mechanisms (2) are located on both sides of the limit control mechanism (1), and the trigger buffer mechanism (2) is located on the moving path of the guide rod (13).

2. The gate limiting device according to claim 1, characterized in that: Both ends of the mounting box (11) are fixed with guide sleeves, and the guide rod (13) is inserted into the guide sleeve and slides in cooperation with the guide sleeve.

3. The gate limiting device according to claim 1, characterized in that: The first spring sleeve (12) has open ends, and the first cover plate (16) is threaded to both ends of the first spring sleeve (12). The guide rod (13) passes through the first cover plate (16) and slides with the first cover plate (16).

4. A gate limiting device according to claim 2 or 3, characterized in that: Both ends of the guide rod (13) are threaded with fine-tuning nuts (110).

5. A gate limiting device according to claim 1, characterized in that: The trigger buffer mechanism (2) includes a second spring cavity (21) and a limiting rod (22) slidably inserted in the second spring cavity (21). One end of the limiting rod (22) is fixed with a contact block (25), and a second piston block (27) is fixed on the limiting rod (22). A second spring (24) is installed on the side of the second piston block (27) away from the contact block (25). The second spring (24) and the second piston block (27) are both located in the second spring cavity (21).

6. A gate limiting device according to claim 5, characterized in that: The second spring sleeve (21) is open at both ends, and the second cover plate (23) is threaded on both ends of the second spring sleeve (21). The limiting rod (22) passes through the second cover plate (23) and slides with the second cover plate (23).

7. A gate limiting device according to claim 6, characterized in that: The end of the limiting rod (22) away from the contact block (25) is threaded with an adjusting nut (26).

8. A gate limiting device according to claim 5, characterized in that: The spring constant of the second spring (24) is greater than that of the first spring (15).

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