Stroke limiting and controlling device for oil cylinder of gate valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a gate valve oil cylinder stroke limiting and control device which comprises a gate valve and a stroke switch control device, and the stroke switch control device comprises a stroke switch trigger, two stroke switch fixing seats and two stroke switches. The travel switch fixing seat is fixedly connected to the outer side face of the valve frame, the travel switch is fixedly connected with the travel switch fixing seat through a bolt, the travel switch trigger is fixedly connected to the inserting plate, and the travel switch trigger triggers the travel switch along with sliding of the inserting plate. According to the device, the travel switch control device is adopted, the travel switch is used for controlling opening and closing of the electric hydraulic valve, accurate adjustment of the travel of the hydraulic cylinder is achieved, and meanwhile remote and intelligent control over the valve can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and specifically relates to a stroke limit and control device for the oil cylinder of a knife gate valve. Background Art

[0002] Valves are commonly used important control devices for controlling the entry and exit of materials. With the continuous optimization of the use environment and the development trend of intelligent industry with gradually reduced manual labor, the hydraulic knife gate valve is a commonly used industrial valve, mainly composed of a hydraulic cylinder, a knife gate, a housing, etc., and the opening and closing of the knife gate valve are realized by the telescopic movement of the oil cylinder. At present, the structure of conventional hydraulic knife gate valves generally directly controls the stroke of the hydraulic cylinder by adjusting the hydraulic valve, with relatively poor accuracy and stability, and it is difficult to realize the intelligent control of the knife gate valve. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a stroke limit and control device for the oil cylinder of a knife gate valve, which includes a knife gate valve and a travel switch control device. The knife gate valve includes a hydraulic cylinder, a valve frame and a knife gate. The hydraulic cylinder drives the knife gate to slide horizontally within the valve frame. The travel switch control device includes a travel switch trigger, two travel switch fixing seats and two travel switches. The travel switch fixing seats are fixedly connected to the outer side surface of the valve frame. The travel switches are fixedly connected to the travel switch fixing seats by bolts. The travel switches are arranged perpendicular to the valve frame, and an induction head is fixedly arranged on the side of the travel switch facing the hydraulic cylinder. The travel switch trigger is L-shaped. A chute is provided at the bottom of the valve frame for the travel switch trigger to penetrate and slide. One end of the travel switch trigger is fixedly connected to the side of the knife gate close to the travel switch, and an operating head is fixedly arranged on the other side of the travel switch trigger. The operating head is arranged between the two induction heads. The travel switch trigger slides with the knife gate to trigger the travel switch.

[0004] Further, the travel switch is connected to an electro-hydraulic valve through a wire, and the electro-hydraulic valve is used to control the start or stop of the movement of the hydraulic cylinder.

[0005] Further, the travel switch fixing seats are welded to the outer side surface of the valve frame.

[0006] Further, the travel switch trigger is welded to the knife gate.

[0007] Further, the travel switch is a direct-acting travel switch or a micro-motion travel switch.

[0008] The utility model further includes other devices or components that can enable the stroke limit and control device for the oil cylinder of the knife gate valve to be used normally, which are all conventional technical means in the art. In addition, the travel switches or hydraulic cylinders not defined in the utility model all adopt conventional technical means in the art.

[0009] The working principle of the present utility model is as follows. The knife gate valve mentioned in this device includes a valve frame made of channel steel, a bolt-type roller bearing, a knife gate, and a hydraulic cylinder. The knife gate is slidably connected within the valve frame through the bolt-type roller bearing. The telescopic rod of the hydraulic cylinder is hingedly connected to the lower side of the knife gate. By driving the movement of the knife gate through the telescopic movement of the hydraulic cylinder, the opening and closing of the valve are achieved. The control of the travel of the knife gate is realized through the travel switch control device provided on the knife gate valve.

[0010] When the valve needs to be opened, the knife gate moves to the right until the travel switch trigger triggers the travel switch on the right side. The electro-hydraulic valve receives the electrical signal transmitted by the travel switch and controls the hydraulic cylinder to stop telescoping, completing the opening action of the valve. When the valve needs to be closed, the knife gate moves to the left until the travel switch trigger triggers the travel switch on the left side. The electro-hydraulic valve receives the electrical signal transmitted by the travel switch and controls the hydraulic cylinder to stop telescoping, completing the closing action of the knife gate valve.

[0011] The specific positions or dimensions of the travel switch fixing seat and the travel switch trigger fixedly connected to the knife gate valve are set according to parameters such as the actual required travel of the knife gate and the opening and closing positions of the knife gate.

[0012] The beneficial effects of the present utility model are as follows. In this device, a travel switch control device is adopted to control the opening and closing of the electro-hydraulic valve with the travel switch, solving the problem of precise adjustment of the travel of the hydraulic cylinder. At the same time, remote and intelligent control of the valve can also be achieved. Description of the Drawings

[0013] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0014] Figure 1 is the overall schematic diagram of the present utility model.

[0015] Figure 2 is the structural schematic diagram of the travel switch trigger in the present utility model. Detailed Embodiment

[0016] The following clearly describes the present utility model in conjunction with the drawings in the embodiments of the present utility model and specific embodiments. The description here is only used to explain the present utility model and does not serve as a limitation to the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present utility model.

[0017] Embodiment

[0018] As Figures 1-2As shown in the figure, the utility model provides a travel limit and control device for a knife gate valve oil cylinder, which includes a knife gate valve 1 and a travel switch control device. The knife gate valve includes a hydraulic cylinder 7, a valve frame 8 and a knife gate 9. The hydraulic cylinder 7 drives the knife gate 9 to slide horizontally within the valve frame 8. The travel switch control device includes a travel switch trigger 2, two travel switch fixing seats 3 and two travel switches 4. The travel switch fixing seats 3 are welded on the outer side surface of the valve frame 8. The travel switches 4 are fixedly connected to the travel switch fixing seats 3 through bolts. The travel switches 4 are arranged perpendicular to the valve frame 8, and an induction head 5 is fixedly arranged on the side of the travel switch 4 facing the hydraulic cylinder 7. The travel switch trigger 2 is L-shaped. A chute 10 is provided at the bottom of the valve frame 8 for the travel switch trigger 2 to penetrate and slide. One end of the travel switch trigger 2 is welded to the side of the knife gate 9 close to the travel switch 4, and an operating head 6 is fixedly arranged on the other side of the travel switch trigger 2. The operating head 6 is arranged between the two induction heads 5. The travel switch trigger 2 triggers the travel switch 4 as the knife gate 9 slides.

[0019] As a further measure of the utility model, the travel switch 4 is connected to an electro-hydraulic valve (not shown in the figure) through a wire, and the electro-hydraulic valve is used to control the start or stop of the movement of the hydraulic cylinder 7; the travel switch 4 is a direct-acting travel switch.

[0020] The working principle of the utility model is that the knife gate valve mentioned in this device includes a valve frame 8 made of channel steel, a bolt-type roller bearing, a knife gate 9 and a hydraulic cylinder 7. The knife gate 9 is slidably connected within the valve frame 8 through a bolt-type roller bearing. The telescopic rod of the hydraulic cylinder 7 is hingedly connected to the lower side of the knife gate 9. The knife gate 9 is driven to move by the hydraulic cylinder 7 to realize the opening and closing of the valve. The control of the travel of the knife gate 9 is realized through the travel switch control device arranged on the knife gate valve.

[0021] When the valve needs to be opened, the knife gate 9 moves to the right until the travel switch trigger 2 on the knife gate 9 triggers the travel switch 4 on the right side. The electro-hydraulic valve receives the electrical signal transmitted from the travel switch 4 and controls the hydraulic cylinder 7 to stop moving, completing the opening action of the valve. When the valve needs to be closed, the knife gate 9 moves to the left until the travel switch trigger 2 triggers the travel switch 4 on the left side. The electro-hydraulic valve receives the electrical signal transmitted from the travel switch 4 and controls the hydraulic cylinder 7 to stop moving, completing the closing action of the knife gate valve.

[0022] The specific positions or dimensions of the travel switch fixing seats 3 and the travel switch trigger 2 fixedly connected to the knife gate valve are set according to parameters such as the actual required travel of the knife gate 9 and the opening and closing positions of the knife gate 9.

[0023] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A travel limit and control device for a flap valve oil cylinder, comprising a flap valve and a travel switch control device. The flap valve includes a hydraulic cylinder, a valve frame, and a flap. The hydraulic cylinder drives the flap to slide horizontally within the valve frame. It is characterized in that: The travel switch control device includes a travel switch trigger, two travel switch fixing seats and two travel switches. The travel switch fixing seats are fixedly connected to the outer side surface of the valve frame. The travel switches are fixedly connected to the travel switch fixing seats through bolts. The travel switches are arranged perpendicular to the valve frame, and an induction head is fixedly arranged on the side of the travel switch facing the hydraulic cylinder. The travel switch trigger is L-shaped. A chute through which the travel switch trigger can penetrate and slide is provided at the bottom of the valve frame. One end of the travel switch trigger is fixedly connected to the side of the plug plate close to the travel switch, and an operating head is fixedly arranged on the other side of the travel switch trigger. The operating head is arranged between the two induction heads. The travel switch trigger slides with the plug plate to trigger the travel switch.

2. The stroke limit and control device for the plug valve oil cylinder according to claim 1, characterized in that: The travel switch is connected to an electro-hydraulic valve through a wire, and the electro-hydraulic valve is used to control the start or stop of the movement of the hydraulic cylinder.

3. The stroke limit and control device for the plug valve oil cylinder according to claim 1, characterized in that: The travel switch fixing seat is welded to the outer side surface of the valve frame.

4. The stroke limit and control device for the plug valve oil cylinder according to claim 1, characterized in that: The travel switch trigger is welded to the plug plate.

5. The stroke limit and control device for the plug valve oil cylinder according to claim 1, characterized in that: The travel switch is a direct-acting travel switch or a micro-motion travel switch.

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