A valve capable of preventing wire slippage and a method of using the same

Abstract

The invention discloses a valve capable of preventing slipping of threads and a method for using the same, comprising a valve body, wherein the valve body is fixedly connected to a housing, the housing is threadedly connected to a threaded rod, the upper end of the threaded rod is connected to a hand wheel; the bottom end of the threaded rod is rotatably connected to a valve core; a spacer is fixedly connected to the valve body, the spacer is provided with a water outlet, and the valve core is arranged directly above the water outlet; the housing is rotatably connected to a threaded shaft, the threaded shaft is connected to a driving mechanism, the threaded shaft is threadedly connected to an outer cylinder, and the outer cylinder is slidably connected to the housing; the lower end of the outer cylinder is connected to a pressing plate after passing through the housing, the pressing plate is provided with a through hole for the threaded rod to pass through, and in an initial state, the lower end of the pressing plate is in contact with the upper end of the valve core. The invention is easy to operate, and can close and lock the valve in time after the slipping of threads occurs, thereby achieving the effect of emergency shutdown and facilitating the subsequent replacement of the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a valve capable of preventing wire slippage and a use method thereof. Background Art

[0002] Valves are control components in pipeline fluid delivery systems, used to change the cross-section of the passage and the direction of medium flow, and have functions such as diversion, shutoff, throttling, non-return, diversion or overflow pressure relief. Valves used for fluid control, from the simplest shut-off valve to various valves used in extremely complex automatic control systems, have a wide variety of varieties and specifications, and can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals and radioactive fluids.

[0003] There are many transmission methods that can be used to control valves. For gear-driven valves, existing valves are prone to thread slippage and failure to close after years of disrepair. If it is inconvenient to replace the valves in time, it is easy to cause waste or accidents, thus bringing unnecessary losses. Summary of the invention

[0004] In order to solve the above problems in the prior art, a valve capable of preventing wire slippage and a method for using the same are provided.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The present invention proposes a valve that can prevent slipping of the thread, comprising a valve body, wherein the valve body is fixedly connected to an outer shell, the outer shell is threadedly connected to a threaded rod, the upper end of the threaded rod is connected to a handwheel; the lower end of the threaded rod is rotatably connected to a valve core; a partition plate is fixedly connected to the valve body, the partition plate is provided with a water outlet, and the valve core is arranged directly above the water outlet; the outer shell is rotatably connected to a threaded shaft, the threaded shaft is connected to a driving mechanism, the threaded shaft is threadedly connected to an outer cylinder, and the outer cylinder is slidably connected to the outer shell; the lower end of the outer cylinder is connected to a pressure plate after passing through the outer shell, the pressure plate is provided with a through hole for the threaded rod to pass through, and in an initial state, the lower end of the pressure plate is in contact with the upper end of the valve core.

[0007] Preferably, the pressing plate is sleeved on the threaded rod, and the threaded rod can slide or rotate in the through hole of the pressing plate, and the aperture of the through hole is smaller than the diameter of the valve core.

[0008] Preferably, the driving mechanism comprises an upper cover rotatably connected to the outer shell, a gear ring is fixedly connected inside the upper cover, a part of the gear ring is provided with teeth, a pinion is fixedly connected to the upper end of the threaded shaft, and the pinion is meshed with the teeth.

[0009] Preferably, a connecting rod is fixedly connected to the upper end of the threaded rod, the upper end of the connecting rod is fixedly connected to the hand wheel, a large gear is fixedly sleeved on the connecting rod, and the large gear is meshed with the teeth.

[0010] Preferably, when the connecting rod rotates, the valve core is driven to move downward, and when the valve core contacts the water outlet, the pinion gear is not meshed with the teeth.

[0011] Preferably, a ratchet is provided on the fixed sleeve on the threaded shaft, the housing is rotatably connected to a pawl via a rotating shaft, the pawl cooperates with the ratchet, and the rotating shaft is connected to the housing via a torsion spring.

[0012] Preferably, the outer shell is provided with an internal thread, and the threaded rod includes an external thread, and the external thread is meshed with the internal thread.

[0013] Preferably, a waterproof ring is provided at the connection between the threaded rod and the housing.

[0014] The present invention also provides a method for using a valve capable of preventing slipping of the thread, which uses the above-mentioned valve capable of preventing slipping of the thread, and comprises the following steps:

[0015] S1: When the handwheel rotates, the handwheel drives the threaded rod to rotate through the connecting rod, and then drives the valve core to move downward. When the thread slips, the valve core cannot be driven to move downward by the specified distance;

[0016] S2: The large gear drives the ring gear to rotate. At this time, as the hand wheel continues to rotate, the teeth and the pinion gear mesh. Then the ring gear drives the pinion gear to rotate, and the pinion gear drives the threaded shaft to rotate.

[0017] S3: As the threaded shaft rotates, the outer cylinder slides downward, the pressure plate drives the valve core to move downward, and then drives the threaded rod to move downward while rotating, so that the valve core completes the blocking of the water outlet. During this process, the ratchet drives the pawl to rotate around the rotating shaft, thereby preventing the threaded shaft from reversing.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention is provided with a threaded shaft. When the threaded shaft rotates, it can drive the outer cylinder to slide in the vertical direction, thereby driving the pressure plate to move downward. Under the action of the pressure plate, the valve core can be driven to continue to move downward. At this time, the threaded rod rotates and moves downward. At the same time, under the action of the ratchet and the pawl, the threaded shaft is prevented from reversing, thereby driving the valve core to move downward a suitable distance, so that the water outlet is closed, and the valve can be closed and locked in time, thereby achieving the effect of emergency shutdown, which is convenient for the subsequent replacement of the valve.

[0020] 2. A gear ring is also provided in the present invention. Under normal conditions, the threaded rod can drive the gear ring to rotate. At this time, after the valve core and the water outlet are in contact, the gear ring is not meshed with the pinion gear, and therefore will not drive the threaded shaft to rotate. When thread slippage occurs, the handwheel continues to rotate, and cannot drive the valve core and the water outlet to complete the coordination. Therefore, as the handwheel continues to rotate, the gear ring will continue to rotate, so that the gear ring and the pinion gear will mesh, thereby driving the threaded shaft to rotate and realizing the downward movement of the pressure plate, which is convenient for driving the valve core to move downward to close the water outlet. Therefore, the pressure plate will only move in the case of thread slippage, thereby not affecting the normal opening and closing of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is the overall front view of the present invention;

[0023] Figure 2 This is the overall front view of the present invention (in working state);

[0024] Figure 3 yes Figure 2 Schematic diagram of the structure of the AA part;

[0025] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle ratchet part.

[0026] Description of reference numerals:

[0027] 1 valve body; 2 connecting rod; 3 upper cover; 4 gear ring; 41 teeth; 5 small gear; 6 threaded shaft; 7 ratchet; 8 pawl; 81 rotating shaft; 9 outer cylinder; 10 pressure plate; 11 handwheel; 12 spacer; 13 water outlet; 14 valve core; 15 internal thread; 16 external thread; 17 threaded rod; 18 outer shell; 19 waterproof ring; 20 large gear. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] Reference Figure 1-4 This embodiment provides a valve that can prevent slipping of the thread, including a valve body 1, an outer wall of the valve body 1 is fixedly connected to a shell 18, and the shell 18 is communicated with the inner space of the valve body 1.

[0030] The outer shell 18 is threadedly connected to a threaded rod 17, and the upper end of the threaded rod 17 is connected to a handwheel 11; the lower end of the threaded rod 17 is rotatably connected to a valve core 14; a partition plate 12 is fixedly connected to the valve body 1, and the partition plate 12 is provided with a water outlet 13, and the valve core 14 is arranged directly above the water outlet 13.

[0031] The shell 18 is provided with a through hole, which passes through the shell 18 and communicates with the space inside the valve body 1. The lower end of the threaded rod 17 passes through the through hole and is connected to the valve core 14. The valve core 14 is adapted to the water outlet 13. As the threaded rod 17 moves downward, the valve core 14 can close the water outlet 13.

[0032] The through hole is provided with an internal thread 15, and the threaded rod 17 includes an external thread 16, which meshes with the internal thread 15. A waterproof ring 19 is provided at the connection between the threaded rod 17 and the housing 18, and a plurality of waterproof rings 19 can be provided according to actual needs, thereby achieving a better water-stopping effect.

[0033] The outer shell 18 is rotatably connected to a threaded shaft 6, the threaded shaft 6 is connected to a driving mechanism, the threaded shaft 6 is threadedly connected to an outer cylinder 9, and the outer cylinder 9 is slidably connected to the outer shell 18; the lower end of the outer cylinder 9 passes through the outer shell 18 and is connected to a pressure plate 10, the pressure plate 10 is provided with a through hole for the threaded rod 17 to pass through, and in the initial state, the lower end of the pressure plate 10 is in contact with the upper end of the valve core 14.

[0034] The upper and lower ends of the threaded shaft 6 are rotatably connected to the housing 18 through bearings, so the threaded shaft 6 can only rotate but not move in the vertical direction. The housing 18 also has a slideway, and the outer cylinder 9 is arranged in the slideway, and the outer cylinder 9 is slidably connected to the slideway, so that the outer cylinder 9 can only move in the vertical direction but not rotate. The outer cylinder 9 is sleeved on the threaded shaft 6, so when the threaded shaft 6 rotates, the outer cylinder 9 can be driven to move downward.

[0035] The pressure plate 10 is sleeved on the threaded rod 17, and the threaded rod 17 can slide or rotate in the through hole of the pressure plate 10. The aperture of the through hole is much smaller than the diameter of the valve core 14. When the pressure plate 10 moves downward, the valve core 14 can be driven to move downward due to the smaller aperture of the through hole.

[0036] The lower end of the threaded rod 17 is a smooth rod, which is arranged in the through hole of the pressure plate 10. When the valve is opened and closed normally, the threaded rod 17 can rotate around the through hole of the pressure plate 10 and slide at the same time.

[0037] The driving mechanism includes an upper cover 3 rotatably connected to the housing 18 , a gear ring 4 is fixedly connected inside the upper cover 3 , a portion of the gear ring 4 is provided with teeth 41 , a pinion 5 is fixedly connected to the upper end of the threaded shaft 6 , and the pinion 5 meshes with the teeth 41 .

[0038] The upper end of the threaded rod 17 is fixedly connected to the connecting rod 2 , and the upper end of the connecting rod 2 is fixedly connected to the hand wheel 11 . A large gear 20 is fixedly sleeved on the connecting rod 2 , and the large gear 20 is meshed with the teeth 41 .

[0039] The upper cover 3 can only rotate around the outer shell 18 , and three quarters of the gear ring 4 is provided with teeth 41 . When the hand wheel 11 drives the connecting rod 2 to rotate, the gear ring 4 can be driven to rotate through the large gear 20 .

[0040] When the connecting rod 2 rotates, the valve core 14 is driven to move downward. When the valve core 14 contacts the water outlet 13, the pinion 5 is not meshed with the teeth 41, and at this time, the pinion 5 is at a certain distance from the teeth 41.

[0041] Therefore, only when the thread slippage problem occurs, when the valve core 14 and the water outlet 13 are not matched, the handwheel 11 drives the ring gear 4 to rotate to a suitable angle, the pinion 5 will mesh with the teeth 41, and the ring gear 4 will drive the threaded shaft 6 to rotate through the pinion 5.

[0042] A ratchet 7 is fixedly sleeved on the threaded shaft 6, and a housing 18 is rotatably connected to a pawl 8 via a rotating shaft 81. The pawl 8 cooperates with the ratchet 7, and the rotating shaft 81 is connected to the housing 18 via a torsion spring.

[0043] Under the action of the torsion spring, the pawl 8 always cooperates with the ratchet 7, and under the action of the pawl 8, the ratchet 7 can be prevented from reversing. When the threaded shaft 6 rotates clockwise, it can drive the ratchet 7 to rotate clockwise, and at the same time drive the outer cylinder 9 to move downward, at which time the pawl 8 can be driven to rotate around the rotating shaft 81, and under the action of the pawl 8, the ratchet 7 cannot rotate counterclockwise, preventing the outer cylinder 9 from moving upward.

[0044] The present invention also provides a method for using a valve capable of preventing slipping of the thread, and the method comprises the following steps:

[0045] S1: When the hand wheel 11 rotates, the hand wheel 11 drives the threaded rod 17 to rotate through the connecting rod 2, thereby driving the valve core 14 to move downward. When the thread slips, the valve core 14 cannot be driven to move downward by a specified distance;

[0046] S2: The large gear 20 drives the ring gear 4 to rotate. At this time, as the hand wheel 11 continues to rotate, the teeth 41 and the pinion 5 are meshed. Then the ring gear 4 drives the pinion 5 to rotate, and the pinion 5 drives the threaded shaft 6 to rotate.

[0047] S3: As the threaded shaft 6 rotates, the outer tube 9 slides downward, the pressure plate 10 drives the valve core 14 to move downward, and then drives the threaded rod 17 to move downward while rotating, so that the valve core 14 completes the blocking work of the water outlet 13. During this process, the ratchet 7 drives the pawl 8 to rotate around the rotating shaft 81, thereby preventing the threaded shaft 6 from reversing.

[0048] It should be noted that when the threaded shaft 6 rotates, it can drive the outer tube 9 to slide in the vertical direction, thereby driving the pressure plate 10 to move downward. Under the action of the pressure plate 10, the valve core 14 can continue to move downward. At this time, the threaded rod 17 rotates and moves downward. At the same time, under the action of the ratchet 7 and the pawl 8, the threaded shaft 6 is prevented from reversing, thereby driving the valve core 14 to move downward a suitable distance, so that the water outlet 13 is closed, and the valve can be closed and locked in time, thereby achieving the effect of emergency shutdown, which is convenient for the subsequent valve replacement work.

[0049] In addition, under normal conditions, the threaded rod 17 can drive the ring gear 4 to rotate. At this time, when the valve core 14 and the water outlet 13 are in contact, the ring gear 4 is not engaged with the pinion 5, and therefore will not drive the threaded shaft 6 to rotate. When thread slippage occurs, the handwheel 11 continues to rotate, and cannot drive the valve core 14 and the water outlet 13 to complete the coordination. Therefore, as the handwheel 11 continues to rotate, the ring gear 4 will continue to rotate, so that the ring gear 4 and the pinion 5 will be engaged, thereby driving the threaded shaft 6 to rotate, realizing the downward movement of the pressure plate 10, so as to facilitate the downward movement of the valve core 14 to close the water outlet 13. Therefore, the pressure plate 10 will only move in the case of thread slippage, thereby not affecting the normal opening and closing of the valve.

[0050] Although the 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A valve capable of preventing wire slippage, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to a housing (18), the housing (18) is threadedly connected to a threaded rod (17), the upper end of the threaded rod (17) is connected to a hand wheel (11); the lower end of the threaded rod (17) is rotatably connected to a valve core (14); a partition plate (12) is fixedly connected inside the valve body (1), the partition plate (12) is provided with a water outlet (13), and the valve core (14) is arranged directly above the water outlet (13); the housing (18) is rotatably connected to a threaded shaft (6), the threaded shaft (6) is connected to a driving mechanism, the threaded shaft (6) is threadedly connected to an outer cylinder (9), and the outer cylinder (9) is slidably connected to the housing (18); the lower end of the outer cylinder (9) passes through the housing (18) and is connected to a pressure plate (10), the pressure plate (10) is provided with a through hole for the threaded rod (17) to pass through, and in an initial state, the lower end of the pressure plate (10) is in contact with the upper end of the valve core (14); The pressing plate (10) is sleeved on the threaded rod (17), and the threaded rod (17) can slide or rotate in a through hole of the pressing plate (10), and the diameter of the through hole is smaller than the diameter of the valve core (14); The driving mechanism comprises an upper cover (3) rotatably connected to the housing (18); a gear ring (4) is fixedly connected inside the upper cover (3); a portion of the gear ring (4) is provided with teeth (41); a pinion (5) is fixedly connected to the upper end of the threaded shaft (6); the pinion (5) meshes with the teeth (41); The upper end of the threaded rod (17) is fixedly connected to a connecting rod (2), the upper end of the connecting rod (2) is fixedly connected to the hand wheel (11), a large gear (20) is fixedly sleeved on the connecting rod (2), and the large gear (20) is meshed with the teeth (41); When the connecting rod (2) rotates, the valve core (14) is driven to move downward, and when the valve core (14) contacts the water outlet (13), the pinion (5) is not meshed with the teeth (41).

2. A valve capable of preventing wire slippage according to claim 1, characterized in that: A ratchet (7) is fixedly mounted on the threaded shaft (6), and the housing (18) is rotatably connected to a pawl (8) via a rotating shaft (81). The pawl (8) cooperates with the ratchet (7), and the rotating shaft (81) is connected to the housing (18) via a torsion spring.

3. A valve capable of preventing wire slippage according to claim 2, characterized in that: The outer shell (18) is provided with an internal thread (15), and the threaded rod (17) includes an external thread (16), and the external thread (16) is meshed with the internal thread (15).

4. A valve capable of preventing wire slippage according to claim 1, characterized in that: A waterproof ring (19) is provided at the connection between the threaded rod (17) and the housing (18).

5. A method for using a valve capable of preventing slipping of the thread, characterized in that: Using the anti-slip valve as claimed in claim 3, The following steps are involved: S1: When the hand wheel (11) is rotated, the hand wheel (11) drives the threaded rod (17) to rotate through the connecting rod (2), thereby driving the valve core (14) to move downward. When the thread is slipped, the valve core (14) cannot be driven to move downward by a specified distance. S2: The large gear (20) drives the ring gear (4) to rotate. At this time, as the hand wheel (11) continues to rotate, the teeth (41) and the pinion (5) are meshed. Then, the ring gear (4) drives the pinion (5) to rotate, and the pinion (5) drives the threaded shaft (6) to rotate. S3: As the threaded shaft (6) rotates, the outer cylinder (9) is driven to slide downward, the pressure plate (10) drives the valve core (14) to move downward, and the threaded rod (17) is then driven to move downward while rotating, so that the valve core (14) completes the work of blocking the water outlet (13). During this process, the ratchet wheel (7) drives the pawl (8) to rotate around the rotating shaft (81), thereby preventing the threaded shaft (6) from rotating backward.

Images