Stop valve capable of limiting flow

Abstract

The invention relates to the technical field of stop valves, in particular to a stop valve capable of limiting flow, which comprises an oil tank arranged at the upper end of a valve body, a steel brush is obliquely and fixedly mounted at one end of the oil tank, an oblique oil outlet hole is formed in one end of the oil tank, and the oil outlet hole is positioned at the upper end of the steel brush. When the valve rod rotates, a second gear is driven to rotate, when the second gear rotates, a first gear and a rotating rod are driven to rotate, the rotating rod drives a circular shaft to rotate through a second steering gear, when the circular shaft rotates, a first steering gear is driven to rotate, the circular rod is driven to rotate through the first steering gear, the circular rod drives a first chain wheel to rotate, and the first chain wheel drives a chain to drive a push plate to rotate. The push plate pushes lubricating oil upwards, when the lubricating oil moves to one side of the oil outlet hole, the lubricating oil flows to the upper end of the steel brush along the inclined oil outlet hole and flows to bristles of the steel brush through the oil guide groove, and the valve rod is lubricated and protected against rust while dust of the valve rod is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of stop valves, in particular to a stop valve capable of limiting flow. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be large, otherwise the valve stem will bend. For example, Chinese patent CN 204493752 U discloses a stop valve with a fixed flow rate. Its technical solution is as follows: a stop valve with a fixed flow rate, including a valve body, a valve disc, a valve stem, a valve cover and a handwheel. The valve body has an inlet channel and an outlet channel, and the valve body is provided with a limit mechanism to limit the rotation of the valve stem.

[0003] However, after the existing stop valve is installed, the stop valve stem is usually exposed to the outside for a long time, which makes it very inconvenient for the user to rotate the stop valve stem by operating the handwheel in the later stage. There is no mechanism to clean the groove of the outer wall of the stop valve stem while the stop valve stem is rotating, and there is no mechanism to inject oil into the stop valve stem while cleaning the groove. As a result, the stop valve stem is not very flexible when rotating, and the operation is inconvenient, which easily leads to a short service life of the stop valve in the later stage. Summary of the Invention

[0004] The object of the present invention is to provide a stop valve capable of limiting flow, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a stop valve capable of limiting flow, comprising an oil tank disposed at the upper end of a valve body, a steel brush being fixedly and obliquely mounted on one end of the oil tank, an inclined oil outlet being formed at one end of the oil tank, the oil outlet being located above the steel brush, a sprocket 1 and a sprocket 2 being rotatably connected within the oil tank, a chain being transmission-connected to the outer ends of the sprocket 1 and the sprocket 2, a plurality of push plates being evenly and fixedly mounted on the outer wall of the chain, the push plates being in contact with the side wall of one end of the oil tank, a driving component being disposed at the upper end of the valve body, and the chain being driven to rotate by the driving component; The lower end of the valve stem is rotatably connected to a sleeve, the inner end of the sleeve is slidably connected to a mounting rod, the lower end of the mounting rod is fixedly connected to a valve disc, and the valve disc is provided with flow limiting holes running through its upper and lower ends. A spring is installed between the sleeve and the mounting rod, and a circular plate is fixedly installed at the outer end of the sleeve.

[0006] Preferably, the driving component includes a slide groove opened on the outer wall of the valve stem and a rotating rod rotatably connected to the outer wall of the valve body. The outer end of the valve stem is sleeved with gear 2, and the inner end of gear 2 is fixedly installed with a slider corresponding to the slide groove, and the slider is slidably inserted into the slide groove.

[0007] Preferably, the rotating rod and the valve stem are arranged in parallel, the lower end of the rotating rod is rotatably connected to the upper end of the valve body through a bearing, the outer wall of the upper end of the rotating rod is fixedly installed with gear one, gear one and gear two are meshed and connected, the outer end of the rotating rod is rotatably connected to two rotating sleeves, the two rotating sleeves are respectively located at the upper and lower ends of gear one, and two limit rods are symmetrically fixedly installed on the outer wall of each rotating sleeve, and the limit rods are located on the outside of gear two.

[0008] Preferably, a support rod is provided on one side of the rotating rod, the lower end of the support rod is fixed to the upper end of the valve body, the upper end of the support rod is rotatably connected to a circular shaft through a bearing, and the circular shaft and one end side wall of the oil tank are arranged parallel.

[0009] Preferably, one end of the circular shaft is fixedly mounted with a steering gear 1, the other end is fixedly mounted with a steering gear 2, the outer wall of the rotating rod is fixedly mounted with the steering gear 2, and the outer walls of the two steering gears 2 are meshed and connected with each other.

[0010] Preferably, the upper and lower sides of the inner end of the oil tank are rotatably connected to round rods, sprocket one and sprocket two are fixedly sleeved on the outer wall of the round rod, one end of the round rod at the upper end passes through the outer end of the oil tank and is fixedly installed with steering gear one, and the outer walls of the two steering gears are meshed and connected.

[0011] Preferably, an oil guide groove is provided at the upper end of the steel brush, and the outer end of the steel brush contacts the outer wall of the valve stem.

[0012] Preferably, an oil filling hole is opened on one side of the upper end of the oil tank, a rubber plug is provided in the oil filling hole, and lubricating oil is provided in the oil tank.

[0013] Preferably, a shielding cover is fixedly mounted on the upper end of the valve body, and one end of the valve stem rotates through the upper end side wall of the shielding cover.

[0014] Preferably, the diameter of the circular plate is smaller than the diameter of the large end of the valve disc, and a sealing ring is fixedly installed at the lower end of the circular plate. The valve stem drives the valve disc to move downward and blocks the flow channel of the valve body, and the fluid flows through the flow limiting hole. When the valve stem continues to rotate, the sleeve slides on the outer wall of the mounting rod through the extrusion spring, synchronously driving the circular plate to move downward. The circular plate contacts the upper end of the valve disc through the sealing ring and blocks the flow limiting hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the stop valve is used, the present invention needs to rotate the valve stem. When the valve stem rotates, it drives gear two to rotate. When gear two rotates, it drives gear one and the rotating rod to rotate. The rotating rod drives the circular shaft to rotate through steering gear two. When the circular shaft rotates, it drives steering gear one to rotate, and drives the circular rod to rotate through steering gear one. The circular rod drives sprocket one to rotate. Sprocket one drives the chain to rotate with the push plate. The push plate pushes the lubricating oil upward. When the lubricating oil moves to one side of the oil outlet hole, it flows along the inclined oil outlet hole to the upper end of the steel brush and flows through the oil guide groove to the bristles of the steel brush, thereby cleaning the valve stem from dust and lubricating and rust-proofing the valve stem at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of a shield removal structure according to the present invention; Figure 3 This is a schematic diagram of the second structure of the shielding cover removed according to the present invention; Figure 4 This is a structural schematic diagram of one end of the fuel tank of the present invention; Figure 5 For the present invention Figure 2 A magnified view of the structure of the middle A area; Figure 6 This is a schematic diagram of the cross-sectional structure of the fuel tank of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the valve body of the present invention.

[0017] In the figure: 1. Valve body; 2. Valve stem; 3. Slide; 4. Oil tank; 5. Rubber plug; 6. Oil outlet; 7. Steel brush; 8. Oil guide groove; 9. Round rod; 10. Steering gear 1; 11. Round shaft; 12. Steering gear 2; 13. Sprocket 1; 14. Sprocket 2; 15. Chain; 16. Push plate; 17. Support rod; 18. Rotating rod; 19. Shielding cover; 20. Gear 1; 21. Rotating sleeve; 22. Gear 2; 23. Limit rod; 24. Sleeve; 25. Spring; 26. Mounting rod; 27. Round plate; 28. Valve disc; 29. ​​Flow limiting hole. DETAILED DESCRIPTION

[0018] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 7The present invention provides a technical solution: a stop valve with limited flow, comprising an oil tank 4 arranged at the upper end of the valve body 1, and a steel brush 7 is fixedly installed at one end of the oil tank 4 at an angle. The outer end of the steel brush 7 contacts the outer wall of the valve stem 2. When the valve stem 2 rotates, the steel brush 7 can clean the outer wall of the valve stem 2 and brush out impurities in the thread groove of the valve stem 2. An oil guide groove 8 is provided on the brush handle at the upper end of the steel brush 7, and an inclined oil outlet hole 6 is provided at one end of the oil tank 4. The oil outlet hole 6 is located at the upper end of the steel brush 7 and the oil guide groove 8. The lubricating oil in the oil tank 4 is discharged to the upper end of the steel brush 7 through the oil outlet hole 6, and flows to the bristles of the steel brush 7 through the oil guide groove 8, thereby cleaning the dust on the valve stem 2 and lubricating and preventing rust on the valve stem 2 at the same time.

[0020] A sprocket 13 and a sprocket 2 14 are rotatably connected inside the oil tank 4, and a chain 15 is connected to the outer ends of the sprocket 13 and the sprocket 2 14 for transmission. A number of push plates 16 are evenly and fixedly mounted on the outer wall of the chain 15. The push plates 16 are in contact with the inner wall of one end of the oil tank 4 where the oil outlet hole 6 is provided. A driving component is provided at the upper end of the valve body 1, and the chain 15 is driven to rotate by the driving component. When the driving component drives the chain 15 to rotate, the chain 15 will rotate with the number of push plates 16, and the push plates 16 will push the lubricating oil upward. When the lubricating oil moves to one side of the oil outlet hole 6, it will flow along the inclined oil outlet hole 6 to the upper end of the steel brush 7.

[0021] The driving component includes a slide 3 provided on the outer wall of the valve stem 2 and a rotating rod 18 rotatably connected to the outer wall of the valve body 1. The outer end of the valve stem 2 is sleeved with a gear 22. The inner end of the gear 22 is fixedly mounted with a slider corresponding to the slide 3. The slider slides into the slide 3. The gear 22 can rotate with the rotation of the valve stem 2. At the same time, by sliding the slider in the slide 3, the gear 22 can rotate in place. The rotating rod 18 is arranged in parallel with the valve stem 2. The lower end of the rotating rod 18 is rotatably connected to the upper end of the valve body 1 through a bearing. The rotating rod 18 A gear 20 is fixedly mounted on the outer wall of the upper end, and the gear 20 is meshed with the gear 22. The outer end of the rotating rod 18 is rotatably connected to two rotating sleeves 21. The two rotating sleeves 21 are respectively located at the upper and lower ends of the gear 1 20. Two limiting rods 23 are symmetrically fixedly mounted on the outer wall of each rotating sleeve 21. The limiting rods 23 are located on the outside of the gear 2 22. The four limiting rods 23 limit the gear 2 22. When the valve stem 2 rotates, it will drive the gear 2 22 to rotate, and the gear 2 22 will drive the rotating rod 18 to rotate through the gear 1 20.

[0022] A support rod 17 is provided on one side of the rotating rod 18, and the lower end of the support rod 17 is fixed to the upper end of the valve body 1. The upper end of the support rod 17 is rotatably connected to a round shaft 11 through a bearing. The round shaft 11 is fixedly sleeved on the inner wall of the bearing, and the outer wall of the bearing is fixedly installed on the upper end of the support rod 17, so that the round shaft 11 can rotate in place. The round shaft 11 and one end side wall of the oil tank 4 are arranged parallel to each other. One end of the round shaft 11 is fixedly installed with a steering gear 10, and the other end is fixedly installed with a steering gear 2 12. The outer wall of the rotating rod 18 is fixedly installed with a steering gear 2 12, and the outer walls of the two steering gears 2 12 are meshed with each other. The inner end of the oil tank 4 is rotatably connected with a round rod 9 on both the upper and lower sides, and the sprocket 1 13 and the sprocket 2 14 are fixedly sleeved on the outer wall of the round rod 9. One end of the round rod 9 at the upper end passes through the outer end of the oil tank 4 and is fixedly installed with a steering gear 10, and the outer walls of the two steering gears 10 are meshed.

[0023] Specifically, when using the stop valve, the valve stem 2 needs to be rotated. When the valve stem 2 rotates, it will drive the gear 2 22 to rotate. When the gear 2 22 rotates, it will drive the gear 1 20 and the rotating rod 18 to rotate. The rotating rod 18 drives the circular shaft 11 to rotate through the steering gear 2 12. When the circular shaft 11 rotates, it will drive the steering gear 10 to rotate, and drive the circular rod 9 to rotate through the steering gear 10. The circular rod 9 drives the sprocket 13 to rotate. The sprocket 13 drives the chain 15 to rotate with the push plate 16. The push plate 16 pushes the lubricating oil upward. When the lubricating oil moves to one side of the oil outlet 6, it will flow along the inclined oil outlet 6 to the upper end of the steel brush 7, and flow through the oil guide groove 8 to the bristles of the steel brush 7, thereby cleaning the dust on the valve stem 2 while lubricating and preventing rust on the valve stem 2.

[0024] The lower end of the valve stem 2 is rotatably connected to the sleeve 24, and the inner end of the sleeve 24 is slidably connected to the mounting rod 26. The lower end of the mounting rod 26 is fixedly connected to the valve disc 28. The valve disc 28 is provided with a flow limiting hole 29 running through its upper and lower ends. A spring 25 is installed between the sleeve 24 and the mounting rod 26. The outer end of the sleeve 24 is fixedly installed with a circular plate 27. The diameter of the circular plate 27 is smaller than the diameter of the large end of the valve disc 28. A sealing ring is fixedly installed at the lower end of the circular plate 27. The valve stem 2 drives the valve disc 28 to move downward and block the flow channel of the valve body 1. The fluid flows through the flow limiting hole 29. When the valve stem 2 continues to be rotated, the sleeve 24 slides on the outer wall of the mounting rod 26 by squeezing the spring 25, and synchronously drives the circular plate 27 to move downward. The circular plate 27 contacts the upper end of the valve disc 28 through the sealing ring and blocks the flow limiting hole 29.

[0025] Specifically, when it is necessary to limit the flow of the fluid, the valve disc 28 is driven downward by rotating the valve stem 2 to block the flow channel of the valve body 1, and the fluid flows through the flow limiting hole 29. If it is necessary to close the stop valve, the valve stem 2 is continued to be rotated, and the sleeve 24 moves downward with the circular plate 27 through the extrusion spring 25. The circular plate 27 contacts the upper end of the valve disc 28 through the sealing ring and blocks the flow limiting hole 29, thereby sealing the flow limiting hole 29.

[0026] like Figure 2 and Figure 4 As shown, in some embodiments, an oil filling hole is opened on one side of the upper end of the oil tank 4, a rubber plug 5 is provided in the oil filling hole, and lubricating oil is provided in the oil tank 4. More specifically, lubricating oil can be injected into the oil tank 4 through the oil filling hole, and the rubber plug 5 can be inserted into the oil filling hole to seal it, so that lubricating oil can be added to the oil tank 4 conveniently.

[0027] like Figure 1 As shown, in some embodiments, a shielding cover 19 is fixedly installed on the upper end of the valve body 1, and one end of the valve stem 2 rotates through the upper side wall of the shielding cover 19. More specifically, the shielding cover 19 shields the driving component to increase the service life of the driving component.

[0028] During actual use, when using the stop valve, the valve stem 2 needs to be rotated. When the valve stem 2 rotates, it will drive the gear 2 22 to rotate. When the gear 2 22 rotates, it will drive the gear 1 20 and the rotating rod 18 to rotate. The rotating rod 18 drives the circular shaft 11 to rotate through the steering gear 2 12. When the circular shaft 11 rotates, it will drive the steering gear 10 to rotate, and drive the circular rod 9 to rotate through the steering gear 10. The circular rod 9 drives the sprocket 13 to rotate. The sprocket 13 drives the chain 15 to rotate with the push plate 16. The push plate 16 pushes the lubricating oil upward. When the lubricating oil moves to one side of the oil outlet 6, it will flow along the inclined oil outlet 6 to the upper end of the steel brush 7, and flow through the oil guide groove 8 to the bristles of the steel brush 7, thereby cleaning the dust on the valve stem 2 while lubricating and preventing rust on the valve stem 2.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A stop valve capable of limiting flow, characterized in that: The invention comprises an oil tank (4) arranged at the upper end of the valve body (1), a steel brush (7) is fixedly installed at one end of the oil tank (4), an inclined oil outlet hole (6) is opened at one end of the oil tank (4), and the oil outlet hole (6) is located at the upper end of the steel brush (7), a sprocket 1 (13) and a sprocket 2 (14) are rotatably connected in the oil tank (4), the outer ends of the sprocket 1 (13) and the sprocket 2 (14) are connected to a chain (15), and a plurality of push plates (16) are evenly fixedly installed on the outer wall of the chain (15), and the push plates (16) are in contact with the side wall of one end of the oil tank (4). A driving component is provided at the upper end of the valve body (1), and the chain (15) is driven to rotate by the driving component. The lower end of the valve stem (2) is rotatably connected to a sleeve (24), the inner end of the sleeve (24) is slidably connected to a mounting rod (26), the lower end of the mounting rod (26) is fixedly connected to a valve disc (28), and the valve disc (28) is provided with a flow limiting hole (29) passing through the upper and lower ends thereof. A spring (25) is installed between the sleeve (24) and the mounting rod (26), and a circular plate (27) is fixedly installed at the outer end of the sleeve (24).

2. A flow-limitable stop valve according to claim 1, characterized in that: The driving component includes a slide groove (3) provided on the outer wall of the valve stem (2) and a rotating rod (18) rotatably connected to the outer wall of the valve body (1); the outer end of the valve stem (2) is sleeved with a gear 2 (22); the inner end of the gear 2 (22) is fixedly mounted with a slider corresponding to the slide groove (3); the slider is slidably inserted into the slide groove (3).

3. A stop valve capable of limiting flow according to claim 2, characterized in that: The rotating rod (18) and the valve stem (2) are arranged in parallel. The lower end of the rotating rod (18) is rotatably connected to the upper end of the valve body (1) through a bearing. A gear 1 (20) is fixedly installed on the outer wall of the upper end of the rotating rod (18). The gear 1 (20) and the gear 2 (22) are meshed and connected. The outer end of the rotating rod (18) is rotatably connected to two rotating sleeves (21). The two rotating sleeves (21) are respectively located at the upper and lower ends of the gear 1 (20). Two limiting rods (23) are symmetrically fixedly installed on the outer wall of each rotating sleeve (21). The limiting rods (23) are located on the outer side of the gear 2 (22).

4. A stop valve capable of limiting flow according to claim 3, characterized in that: A support rod (17) is provided on one side of the rotating rod (18), the lower end of the support rod (17) is fixed to the upper end of the valve body (1), and the upper end of the support rod (17) is rotatably connected to a circular shaft (11) via a bearing, and the circular shaft (11) and one end side wall of the oil tank (4) are arranged in parallel.

5. A stop valve capable of limiting flow according to claim 4, characterized in that: One end of the circular shaft (11) is fixedly mounted with a steering gear 1 (10), and the other end is fixedly mounted with a steering gear 2 (12). The outer wall of the rotating rod (18) is fixedly mounted with the steering gear 2 (12), and the outer walls of the two steering gears 2 (12) are meshed and connected with each other.

6. A stop valve capable of limiting flow according to claim 5, characterized in that: The inner end of the oil tank (4) is rotatably connected to a round rod (9) on both the upper and lower sides. The sprocket 1 (13) and the sprocket 2 (14) are fixedly sleeved on the outer wall of the round rod (9). One end of the round rod (9) at the upper end passes through the outer end of the oil tank (4) and is fixedly installed on the steering gear 1 (10). The outer walls of the two steering gears 1 (10) are meshed and connected.

7. The flow-limitable stop valve according to claim 1, characterized in that: An oil guide groove (8) is provided at the upper end of the steel brush (7), and the outer end of the steel brush (7) contacts the outer wall of the valve stem (2).

8. The flow-limitable stop valve according to claim 1, characterized in that: An oil filling hole is provided on one side of the upper end of the oil tank (4), a rubber plug (5) is provided in the oil filling hole, and lubricating oil is provided in the oil tank (4).

9. The flow-limitable stop valve according to claim 1, characterized in that: A shielding cover (19) is fixedly mounted on the upper end of the valve body (1), and one end of the valve stem (2) rotates through the upper end side wall of the shielding cover (19).

10. The flow-limitable stop valve according to claim 1, characterized in that: The diameter of the circular plate (27) is smaller than the diameter of the large end of the valve disc (28). A sealing ring is fixedly installed at the lower end of the circular plate (27). The valve stem (2) drives the valve disc (28) to move downward and blocks the flow channel of the valve body. The fluid flows through the flow-limiting hole (29). When the valve stem (2) continues to rotate, the sleeve (24) slides on the outer wall of the mounting rod (26) through the extrusion spring (25), synchronously driving the circular plate (27) to move downward. The circular plate (27) contacts the upper end of the valve disc (28) through the sealing ring and blocks the flow-limiting hole (29).

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