Self-locking switch of stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve self-locking switch which comprises a valve body, a valve cover, a screw rod, a valve plate, a supporting rod, a connecting plate, a pressing rod, a baffle, a lever plate, a fulcrum and a sealing gasket. The screw rod rotates to drive the valve plate to move downwards, then the left end and the right end of the valve plate make contact with the valve body and the baffle respectively, the function of closing the valve is achieved, meanwhile, in the process that the valve plate moves downwards to be close to the valve body and the baffle, the pressing rod presses the right end of the lever plate downwards, and due to the action of the fulcrum and the pressing rod, the valve plate is closed. The left end of the lever plate moves in the direction close to the valve plate, then the sealing gasket on the lever plate is attached to the lower bottom face of the valve plate, the valve plate is used for closing the valve body firstly, then the sealing gasket is used for improving the sealing performance of the valve plate, the phenomenon of liquid leakage is not prone to occurring when the valve is closed, and the sealing performance of the valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of globe valves, and specifically relates to a self-locking switch for a globe valve. Background Art

[0002] A globe valve, also known as a stop valve, belongs to a forced-sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. However, in the prior art, in actual operation of the globe valve, the valve is prone to not being tightly closed. At the same time, due to the large fluid resistance inside the globe valve, during long-term operation, the sealing reliability is not strong. Therefore, in view of the above technical problems, a self-locking switch for a globe valve is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a self-locking switch for a globe valve, and by setting a valve plate, a support rod, a connecting plate, a pressure rod, a baffle, a lever plate, a fulcrum and a sealing gasket, the problems raised in the above background art are solved.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A self-locking switch for a globe valve includes a valve body and a valve cover. A screw rod is rotatably arranged in the middle of the valve cover. The lower end of the screw rod penetrates through the valve cover and extends into the valve body, and a valve plate is arranged at the lower end of the screw rod. A support rod is fixedly arranged on the upper surface of the valve plate. The top end of the support rod is fixedly provided with a connecting plate. A pressure rod is connected to the lower end of the connecting plate, and the pressure rod is located on the side of the connecting plate away from the screw rod;

[0006] A baffle is arranged in the inner cavity of the valve body. A lever plate is arranged in the inner cavity of the baffle. The lever plate penetrates through the baffle. A fulcrum is arranged at the lower end of the lever plate, and the end of the fulcrum away from the lever plate is fixed at the bottom of the inner cavity of the baffle. A sealing gasket is arranged on the top surface of the lever plate.

[0007] As a preferred solution, a stop block is further arranged in the valve body, and a clamping groove is arranged on the stop block.

[0008] As a preferred solution, a clamping block is fixedly connected to the lower end of the left port of the valve plate, and the clamping block is matched with the clamping groove.

[0009] As a preferred solution, a screw sleeve is attached to the outer wall of the screw rod.

[0010] As a preferred solution, a rotating handwheel is arranged at the upper end of the screw rod.

[0011] As a preferred solution, the valve cover is installed on the top of the valve body through bolts, and nuts are arranged at the tops of the bolts.

[0012] As can be seen from the technical solution provided by the present utility model above, a self-locking switch of a globe valve provided by the present utility model has the following beneficial effects:

[0013] 1. By rotating the screw rod, the valve plate is driven to move downward, so that the left and right ends of the valve plate are respectively in contact with the valve body and the baffle, achieving the function of closing the valve. At the same time, during the downward movement of the valve plate close to the valve body and the baffle, the pressure rod presses the right end of the lever plate. Due to the action of the fulcrum and the pressure rod, the left end of the lever plate moves towards the direction close to the valve plate, so that the sealing gasket on the lever plate fits on the lower bottom surface of the valve plate. First, the valve body is closed by the valve plate, and then the sealing gasket is used to increase the sealing performance of the valve plate, making it not easy to leak liquid when the valve is closed and increasing the sealing performance of the valve;

[0014] 2. By arranging a card slot on the stop block and a clamping block on the valve plate that matches the card slot, during the downward movement of the valve plate, the clamping block is driven to fall into the card slot to limit the valve plate. At the same time, the gravity of the valve plate by the screw rod and the upward supporting force of the lever plate on the valve plate are used to self-lock the globe valve, increasing the stability of the globe valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of a self-locking switch of a globe valve according to the present utility model;

[0016] Figure 2 is an enlarged view of part A of a self-locking switch of a globe valve according to the present utility model;

[0017] Figure 3 is an enlarged view of part B of a self-locking switch of a globe valve according to the present utility model.

[0018] In the figure: 1. Valve body; 2. Valve cover; 3. Screw rod; 4. Screw sleeve; 5. Valve plate; 6. Support rod; 7. Connecting plate; 8. Pressure rod; 9. Lever plate; 10. Fulcrum; 11. Sealing gasket; 12. Baffle; 13. Stop block; 14. Card slot; 15. Clamping block; 16. Rotating handwheel; 17. Bolt; 18. Nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and the specific embodiments.

[0024] As Figures 1-3 shown, an embodiment of the present utility model provides a self-locking switch for a globe valve, which includes a valve body 1 and a valve cover 2. A screw rod 3 is rotatably disposed in the middle of the valve cover 2. The lower end of the screw rod 3 penetrates through the valve cover 2 and extends into the valve body 1. A valve plate 5 is disposed at the lower end of the screw rod 3. A support rod 6 is fixedly disposed on the upper surface of the valve plate 5. A connecting plate 7 is fixedly disposed at the top end of the support rod 6. A pressure rod 8 is connected to the lower end of the connecting plate 7. The pressure rod 8 is located on the side of the connecting plate 7 away from the screw rod 3;

[0025] A baffle 12 is disposed in the inner cavity of the valve body 1. A lever plate 9 is disposed in the inner cavity of the baffle 12. The lever plate 9 penetrates through the baffle 12. A fulcrum 10 is disposed at the lower end of the lever plate 9. One end of the fulcrum 10 away from the lever plate 9 is fixed to the bottom of the inner cavity of the baffle 12. A sealing gasket 11 is disposed on the top surface of the lever plate 9.

[0026] Among them, the rotation of the screw rod 3 drives the valve plate 5 to move downward, making the valve plate 5 approach the valve body 1 and the baffle 12. When the left and right ends of the valve plate 5 come into contact with the valve body 1 and the baffle 12 respectively, the function of shutting off the valve is achieved. At the same time, during the downward movement of the valve plate 5, the pressure rod 8 acts on the right end of the lever plate 9 arranged in the inner cavity of the baffle 12. By the action of the fulcrum 10, the left end of the lever plate 9 moves towards the direction close to the valve plate 5, and then the sealing gasket 11 on the lever plate 9 fits on the lower bottom surface of the valve plate 5. First, the valve plate 5 is used to close the valve body 1, and then the sealing gasket 11 is used to increase the sealing performance of the valve plate 5, so that the valve is not prone to liquid leakage when closed, and the sealing performance of the valve is increased.

[0027] As Figure 3 shown, a stop block 13 is further arranged in the valve body 1, and a clamping groove 14 is arranged on the stop block 13.

[0028] Among them, the stop block 13 is used to increase the sealing performance between the valve plate 5 and the valve body 1. The clamping groove 14 is arranged on the stop block 13 to facilitate the stop block 13 to limit the valve plate 5.

[0029] As Figure 3 shown, a clamping block 15 is fixedly connected to the lower end of the left side port of the valve plate 5, and the clamping block 15 is matched with the clamping groove 14.

[0030] Among them, a clamping block 15 matched with the clamping groove 14 is arranged on the valve plate 5. During the downward movement of the valve plate 5, the clamping block 15 can be clamped in the clamping groove 14 to limit the valve plate 5. At the same time, the gravity of the valve plate 5 by the screw rod 3 and the upward supporting force of the lever plate 9 on the valve plate 5 are used to lock the globe valve, increasing the stability of the globe valve.

[0031] As Figure 1 shown, a spiral sleeve 4 is attached to the outer wall of the screw rod 3.

[0032] Among them, the spiral sleeve 4 is arranged on the outer wall of the screw rod 3 to facilitate the rotation of the screw rod 3 and make it labor-saving when the screw rod 3 rotates.

[0033] As Figure 1 shown, a rotary handwheel 16 is arranged at the upper end of the screw rod 3.

[0034] Among them, the rotary handwheel 16 is arranged on the screw rod 3. The rotation of the rotary handwheel 16 can drive the screw rod 3 to rise and fall to achieve the purpose of opening and closing the globe valve.

[0035] As Figure 1 shown, the valve cover 2 is installed on the top of the valve body 1 through bolts 17, and nuts 18 are arranged at the tops of the bolts 17.

[0036] Among them, by arranging the bolts 17, the valve cover 2 can be installed on the valve body 1, and it is not easy for the valve cover 2 to fall off the valve body 1.

[0037] Working principle of this embodiment: When the globe valve needs to be closed, by rotating the rotary handwheel 16, the screw rod 3 is driven to move downward, approaching the valve body 1 and the baffle 12. During the downward movement of the valve plate 5, the pressure rod 8 acts on the right end of the lever plate 9 inside the baffle 12. By using the function of the fulcrum 10, the left end of the lever plate 9 moves towards the direction close to the valve plate 5. Furthermore, the sealing gasket 11 on the lever plate 9 fits on the lower bottom surface of the valve plate 5, making it not easy for the valve to leak liquid when closed, increasing the sealing performance of the valve. At the same time, during the downward movement of the valve plate 5, the latch 15 can be engaged in the card slot 14 to limit the valve plate 5. At the same time, by using the gravity of the valve plate 5 by the screw rod 3 and the upward supporting force of the lever plate 9 on the valve plate 5, the globe valve is self-locked, increasing the stability of the globe valve. When the globe valve needs to be opened, rotate the rotary handwheel 16 in the reverse direction, driving the screw rod 3 to move upward, making the pressure rod 8 away from the lever plate 9. Furthermore, the lever plate 9 moves away from the valve plate 5. At the same time, the latch 15 is separated from the card slot 14, opening the globe valve.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking switch for a globe valve, comprising a valve body (1) and a valve cover (2), characterized in that: A screw rod (3) is rotatably arranged in the middle of the valve cover (2). The lower end of the screw rod (3) penetrates through the valve cover (2) and extends into the valve body (1), and a valve plate (5) is arranged at the lower end of the screw rod (3). A support rod (6) is fixedly arranged on the upper surface of the valve plate (5). The top end of the support rod (6) is fixedly provided with a connecting plate (7). A pressure rod (8) is connected to the lower end of the connecting plate (7), and the pressure rod (8) is located on the side of the connecting plate (7) away from the screw rod (3). A baffle plate (12) is arranged in the inner cavity of the valve body (1). A lever plate (9) is arranged in the inner cavity of the baffle plate (12). The lever plate (9) penetrates through the baffle plate (12). A fulcrum (10) is arranged at the lower end of the lever plate (9). One end of the fulcrum (10) away from the lever plate (9) is fixed at the bottom of the inner cavity of the baffle plate (12). A sealing gasket (11) is arranged on the top surface of the lever plate (9).

2. The stop valve self-locking switch according to claim 1, characterized in that: A stop block (13) is further arranged in the valve body (1), and a clamping groove (14) is arranged on the stop block (13).

3. The stop valve self-locking switch according to claim 2, characterized in that: A clamping block (15) is fixedly connected to the lower end of the left port of the valve plate (5), and the clamping block (15) is matched with the clamping groove (14).

4. The self-locking switch of the globe valve according to claim 1, wherein: A screw sleeve (4) is attached to the outer wall of the screw rod (3).

5. The self-locking switch of the globe valve according to claim 4, characterized in that: A rotary handwheel (16) is arranged at the upper end of the screw rod (3).

6. The stop valve self-locking switch according to claim 5, characterized in that: The valve cover (2) is installed on the top of the valve body (1) through bolts (17), and nuts (18) are arranged at the tops of the bolts (17).

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