Switch indication butterfly valve

Abstract

A switch indication butterfly valve comprises a valve body, a valve cover arranged at the top of the valve body, a control box arranged at the top of the valve cover, a valve cavity formed in the valve body, a valve plate arranged in the valve cavity, a valve rod connected to the top of the valve plate, a sliding groove formed in the inner wall of the control box, and a rack arranged in the sliding groove and capable of sliding along the sliding groove. The valve rod in the control box is sleeved with a valve rod gear, the control box is further provided with a hand wheel, the center of the hand wheel is connected with a rotating shaft, the bottom end of the rotating shaft is provided with a rotating shaft gear, one side of the rotating shaft gear is meshed with the valve rod gear, and the other side of the rotating shaft gear is meshed with the rack. A prompting hole is formed in the side wall, corresponding to the end of the sliding groove, of the control box, a prompting protruding block is arranged at the end, corresponding to the prompting hole, of the rack, the protruding block penetrates through the prompting hole when the valve plate is completely closed, and the inner end of the rack abuts against the inner end of the sliding groove when the valve plate is completely opened.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a switch indicating butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on-off control of low-pressure pipeline media. A butterfly valve has a disc as the closing member, which rotates around the valve shaft to open and close. However, when using a butterfly valve, it is difficult for workers to control the locking or opening position of the valve body. As a result, it is difficult for users to know when the butterfly valve is opened to the maximum water flow or when the valve disc is in a tightened state, making operation more inconvenient and the valve is easily damaged due to excessive force. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides the following solutions:

[0004] A switch indicating butterfly valve comprises a valve body, a valve cover is arranged on the top of the valve body, a control box is arranged on the top of the valve cover, a valve cavity is arranged in the valve body, a valve plate is arranged in the valve cavity, the top of the valve plate is connected to the valve stem, the top of the valve stem passes through the valve body and the valve cover and is connected to the control box, the inner wall of the control box is provided with a slide groove, the slide groove is provided with a rack that can slide along the slide groove, the valve stem sleeve located in the control box is provided with a valve stem gear, the control box is also provided with a handwheel, the center of the handwheel is connected to the rotating shaft, the bottom of the rotating shaft is provided with a rotating shaft gear, one side of the rotating shaft gear is meshed with the valve stem gear, and the other side of the rotating shaft gear is meshed with the rack; a prompt hole is opened on the side wall of the control box corresponding to the end of the slide groove, and a prompt protrusion is provided at one end of the rack corresponding to the prompt hole. When the valve plate is completely closed, the protrusion passes through the prompt hole, and when the valve plate is fully opened, the inner end of the rack is against the inner end of the slide groove.

[0005] Furthermore, a card block mounting groove is provided downwardly on the top surface of the prompt protrusion, a card block is slidably arranged in the card block mounting groove, a return spring is provided between the card block and the bottom surface of the card block mounting groove, the upper end of the return spring is fixedly connected to the bottom surface of the card block, and the lower end of the return spring is fixedly connected to the bottom surface of the card block mounting groove.

[0006] Furthermore, a limit plate is provided in the open end of the block installation slot, and a clamping plate is extended outward from the bottom end of the block. When the block moves to the highest point, the top surface of the clamping plate abuts against the bottom surface of the limit plate.

[0007] Furthermore, a card block pressing block is provided on the inner wall of the control box where the prompt hole is located, corresponding to the card block, and the card block pressing block is provided with an arc surface facing one side of the card block.

[0008] Furthermore, the top surface of the block is arc-shaped.

[0009] Furthermore, a prompt door is provided on the side wall of the control box corresponding to the prompt hole, and the upper end of the prompt door is hinged to the side wall of the control box through a prompt door rotating shaft.

[0010] Furthermore, a connecting plate is arranged outside the prompt door shaft, and a connecting plate moving groove is vertically opened on the side wall of the control box. The bolt passes through the connecting plate and the moving groove and is screwed with a nut. The bolt can slide up and down along the moving groove. The left and right ends of the connecting plate are connected to the control box side wall at the upper end of the moving groove through a connecting spring.

[0011] The beneficial effects of the utility model are:

[0012] 1. When the valve is fully closed, the prompt block passes through the prompt hole and props up the prompt door. At this time, the rack abuts against the inner wall of the control box, and the handwheel cannot be turned further. When the valve is fully opened, the inner end of the rack abuts against the inner end of the slide, and the handwheel cannot be turned further, avoiding the problem of valve damage caused by excessive opening and closing of the valve by the staff.

[0013] 2. The prompt convex block is provided with a card block. When the valve is fully closed, the prompt convex block passes through the prompt hole and the card block pops out and abuts against the side wall of the control box to prevent the handwheel rotation from affecting the valve opening degree.

[0014] 3. When the valve needs to be opened, press down the prompt door, which will press the block back into the block installation groove. Reverse the handwheel to retract the prompt block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of part A.

[0017] 1. Valve body; 2. Valve chamber; 3. Valve plate; 4. Valve cover; 5. Valve stem; 6. Rotating shaft; 7. Handwheel; 8. Valve stem gear; 9. Rotating shaft gear; 10. Rack; 11. Control box; 12. Slide; 13. Prompt bump; 14. Clamp; 15. Return spring; 16. Clamping plate; 17. Limiting plate; 18. Prompt door; 19. Prompt door rotating shaft; 20. Connecting plate; 21. Connecting spring; 22. Clamp and pressure block. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, the present invention is further described in detail below in conjunction with the embodiments. In order to thoroughly understand the present invention, some specific details will be involved in the following description. In the absence of these specific details, the present invention can still be implemented, that is, those skilled in the art can more effectively introduce the essence of their work to other technicians in the field using these descriptions and statements here. In addition, it should be noted that it should be understood that the specific embodiments described herein are merely used to explain the present application and are not intended to limit the actual scope of protection. All raw materials used in the following examples are commercially available products.

[0019] Example 1: Figure 1-Figure 2 As shown, a switch indicating butterfly valve includes a valve body 1, a valve cover 4 is arranged on the top of the valve body 1, a control box 11 is arranged on the top of the valve cover 4, a valve cavity 2 is arranged in the valve body 1, a valve plate 3 is arranged in the valve cavity 2, the top of the valve plate 3 is connected to the valve stem 5, the top of the valve stem 5 passes through the valve body 1 and the valve cover 4 and is connected to the control box 11, the inner wall of the control box 11 is provided with a slide groove 12, the slide groove 12 is provided with a rack 10 that can slide along the slide groove 12, the valve stem 5 located in the control box 11 is sleeved with a valve stem gear 8, the control box 11 is also provided with a handwheel 7, the center of the handwheel 7 is connected to the rotating shaft 6, and a rotating shaft gear 9 is provided at the bottom end of the rotating shaft 6. One side of the rotating shaft gear 9 is meshed with the valve stem gear 8, and the other side of the rotating shaft gear 9 is meshed with the rack 10; a prompt hole is opened on the side wall corresponding to the end of the control box 11 and the slide groove 12, and a prompt protrusion 13 is provided at one end of the rack 10 corresponding to the prompt hole. When the valve plate 3 is completely closed, the prompt protrusion 13 passes through the prompt hole. When the valve plate 3 is fully opened, the inner end of the rack 10 is against the inner end of the slide groove 12.

[0020] A card block mounting groove is defined downwardly on the top surface of the prompting protrusion 13, within which a card block 14 is slidably mounted. A return spring 15 is disposed between the card block 14 and the bottom surface of the card block mounting groove. The upper end of the return spring 15 is fixedly connected to the bottom surface of the card block 14, while the lower end of the return spring 15 is fixedly connected to the bottom surface of the card block mounting groove. A limit plate 17 is disposed within the open end of the card block mounting groove, and a retaining plate 16 extends outwardly from the bottom end of the card block 14. When the card block 14 reaches its highest point, the top surface of the retaining plate 16 abuts against the bottom surface of the limit plate 17.

[0021] The inner wall of the control box 11 where the prompt hole is located is provided with a card block pressing block 22 corresponding to the card block 14, and the card block pressing block 22 is provided with an arc surface facing the side of the card block 14. The top surface of the card block 14 is arc-shaped.

[0022] A prompt door 18 is provided on the side wall of the control box 11 corresponding to the prompt hole. The upper end of the prompt door 18 is hinged to the side wall of the control box 11 via a prompt door rotating shaft 19. A connecting plate 20 is disposed on the outer surface of the prompt door rotating shaft 19. A connecting plate movable groove is vertically opened on the side wall of the control box 11. Bolts pass through the connecting plate 20 and are screwed into nuts in the movable groove. The bolts can slide up and down along the movable groove. The left and right ends of the connecting plate 20 are connected to the side wall of the control box 11 at the upper end of the movable groove by connecting springs 21.

[0023] The working principle of the present utility model is as follows: by turning the hand wheel 7, the shaft gear 9 rotates, driving the valve stem gear 8 to rotate, and at the same time driving the rack 10 to slide along the slide groove 12. When the valve plate 3 reaches the fully closed position, the prompt protrusion 13 at the end of the rack 10 passes through the prompt hole, and the prompt protrusion 13 pushes up the prompt door 18. At this time, the clamping block 14 rises from the clamping block mounting groove and abuts against the side wall of the control box 11. When the hand wheel 7 is reversed and it is found that it cannot be rotated, this is the valve closed state. During the process of the prompt protrusion 13 moving toward the prompt hole, as the rack 10 moves, the clamping block 22 gradually presses the clamping block 14 downward until the clamping block 14 enters the clamping block mounting groove and causes the prompt protrusion 13 to pass through the prompt hole. After the prompt protrusion 13 passes through the prompt hole, the clamping block 14 pops out again and abuts against the side wall of the control box 11.

[0024] When the valve needs to be opened, the prompt door 18 is pressed down so that the prompt door 18 presses the block 14 into the block installation groove, and the handwheel 7 is reversed at the same time. The shaft gear 9 rotates to make the rack 10 slide toward the inner end of the slide groove 12. At the same time, the shaft gear 9 drives the valve stem gear 8 to rotate. When the prompt protrusion 13 enters the control box 11, the prompt door 18 can be released. When the rack 10 reaches the inner end of the slide groove 12, the handwheel 7 can no longer rotate. At this time, the valve is in the maximum open state.

[0025] According to the present invention, when the valve is fully closed, the prompt protrusion 13 passes through the prompt hole and props up the prompt door 18. At this time, the rack 10 abuts against the inner wall of the control box 11, and the handwheel 7 cannot be further rotated. When the valve is fully opened, the inner end of the rack 10 abuts against the inner end of the slide 12, and the handwheel 7 cannot be further rotated, thereby avoiding the problem of excessive opening and closing of the valve by the staff causing damage to the valve. The prompt protrusion 13 is provided with a clamping block 14. When the valve is fully closed, the prompt protrusion 14 passes through the prompt hole and the clamping block 14 pops out and abuts against the side wall of the control box 11, preventing the rotation of the handwheel 7 from affecting the degree of opening of the valve. When the valve needs to be opened, the prompt door 18 is pressed down, and the prompt door 18 presses the clamping block 14 back into the clamping block mounting groove. The prompt protrusion 13 can be retracted by reversing the handwheel 7.

[0026] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples and is subject to numerous variations. All variations that can be directly derived or conceived by a person of ordinary skill in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A switch indicating butterfly valve, comprising a valve body, a valve cover arranged on the top of the valve body, a control box arranged on the top of the valve cover, a valve cavity arranged in the valve body, a valve plate arranged in the valve cavity, a valve stem connected to the top of the valve plate, and a valve stem extending through the valve body and the valve cover and connected to the control box, characterized in that: The control box is provided with a slide groove on the inner wall, and a rack that can slide along the slide groove is provided in the slide groove. The valve stem sleeve located in the control box is provided with a valve stem gear. The control box is also provided with a handwheel, the center of the handwheel is connected to the rotating shaft, and a rotating shaft gear is provided at the bottom end of the rotating shaft. One side of the rotating shaft gear is meshed with the valve stem gear, and the other side of the rotating shaft gear is meshed with the rack; a prompt hole is provided on the side wall of the control box corresponding to the end of the slide groove, and a prompt protrusion is provided at one end of the rack corresponding to the prompt hole. When the valve plate is completely closed, the protrusion passes through the prompt hole, and when the valve plate is fully opened, the inner end of the rack is against the inner end of the slide groove.

2. A switch indicating butterfly valve as claimed in claim 1, characterized in that: A card block mounting groove is provided downward on the top surface of the prompt protrusion, a card block is slidably arranged in the card block mounting groove, a return spring is provided between the card block and the bottom surface of the card block mounting groove, the upper end of the return spring is fixedly connected to the bottom surface of the card block, and the lower end of the return spring is fixedly connected to the bottom surface of the card block mounting groove.

3. A switch indicating butterfly valve as claimed in claim 2, characterized in that: A limiting plate is provided in the open end of the clamping block installation slot, and a clamping plate is extended outward from the bottom end of the clamping block. When the clamping block moves to the highest point, the top surface of the clamping plate abuts against the bottom surface of the limiting plate.

4. A switch indicating butterfly valve as claimed in claim 2, characterized in that: A card block pressing block is provided on the inner wall of the control box where the prompt hole is located, corresponding to the card block, and the card block pressing block is provided with an arc surface facing one side of the card block.

5. A switch indicating butterfly valve as claimed in claim 4, characterized in that: The top surface of the block is arc-shaped.

6. The switch indicating butterfly valve according to claim 1, characterized in that: The side wall of the control box is provided with a prompt door corresponding to the prompt hole, and the upper end of the prompt door is hinged to the side wall of the control box through a prompt door rotating shaft.

7. A switch indicating butterfly valve as claimed in claim 6, characterized in that: A connecting plate is arranged outside the prompt door shaft, and a connecting plate moving groove is vertically opened on the side wall of the control box. The bolt passes through the connecting plate and is screwed with a nut in the moving groove. The bolt can slide up and down along the moving groove. The left and right ends of the connecting plate are connected to the control box side wall at the upper end of the moving groove through a connecting spring.

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