CN221824509U - A manual and automatic gate valve - Google Patents

Abstract

The utility model discloses a manual-automatic gate valve, comprising a valve body, a valve cover, a valve stem and a gate plate, the valve cover is installed on the upper part of the valve body, the valve stem penetrates the valve cover, and the inner end of the valve stem is linked to the gate plate, and a valve seat for forming a seal with the gate plate when the valve is closed is provided in the valve body; it also comprises a bracket, a worm gear reducer, a motor and a hand wheel, the bracket is installed on the valve cover, the worm gear reducer is installed on the bracket, the output end of the worm gear reducer is linked to the valve stem, a mounting sleeve is respectively provided on both sides of the shell of the worm gear reducer, the motor and the hand wheel are respectively installed on the corresponding mounting sleeves, and the motor and the hand wheel are respectively connected to the two ends of the worm of the worm gear reducer through a transmission switching mechanism. The utility model integrates manual and automatic operation, and the manual and automatic operation can be switched freely. When the automatic operation fails, the manual operation can be switched in time to open and close the valve, and it has the advantages of convenient and safe use.

Description

A manual and automatic gate valve

Technical Field

The utility model relates to the technical field of valve structures, in particular to a manual-automatic gate valve.

Background Art

The gate valve is an opening and closing part, the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate. Usually the sealing surface is welded with metal materials to increase wear resistance. The gate plates are rigid gate plates and elastic gate plates. Depending on the gate plates, gate valves are divided into rigid gate valves and elastic gate valves.

Traditional gate valves are divided into electric gate valves and pure manual gate valves. Electric gate valves use electric actuators to drive the valve stem up and down, which in turn drives the gate plate up and down to open and close the gate valve; manual gate valves use hand wheels to drive the valve stem up and down, which in turn drives the gate plate up and down to open and close the gate valve. Among them, electric gate valves are prone to safety accidents when they fail because they cannot be operated in time, while pure manual gate valves are less convenient in daily use and have the defects of being time-consuming and labor-intensive.

Therefore, it is very necessary to design a manual-automatic gate valve that is safe and convenient to use.

Utility Model Content

The purpose of the utility model is to provide a manual-automatic gate valve, which integrates manual and automatic operation, and the manual and automatic operation can be switched freely. When the automatic operation fails, the manual operation can be switched in time to open and close the valve, which has the advantages of being convenient and safe to use.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a manual-automatic gate valve, comprising a valve body, a valve cover, a valve stem and a gate plate, the valve cover is installed on the upper part of the valve body, the valve stem passes through the valve cover, and the inner end of the valve stem is linked to the gate plate, and a valve seat is provided in the valve body for forming a sealing fit with the gate plate when the valve is closed; it also includes a bracket, a worm gear reducer, a motor and a handwheel, the bracket is installed on the valve cover, the worm gear reducer is installed on the bracket, the output end of the worm gear reducer is linked to the valve stem, a mounting sleeve is respectively provided on both sides of the outer shell of the worm gear reducer, the motor and the handwheel are respectively installed on the corresponding mounting sleeves, and the motor and the handwheel are respectively connected to the two ends of the worm of the worm gear reducer through a transmission switching mechanism.

By adopting the above technical solution, in daily use, the motor can be used to provide power for the opening and closing of the valve. When the valve fails, a transmission switching mechanism is operated to cause the motor to disengage from the worm gear reducer, and another transmission switching mechanism is operated to cause the handwheel to form a linkage with the worm gear reducer. At this time, the valve can be driven to open and close by the handwheel. This integrates manual and automatic operations, and the manual and automatic operations can be switched freely. When the automatic operation fails, the manual operation can be switched in time to open and close the valve, which has the advantages of being convenient and safe to use.

The utility model is further configured as follows: the transmission switching mechanism includes a push rod and a linkage sleeve, the linkage sleeve is slidably arranged in the mounting sleeve, the mounting sleeve is provided with a guide hole along the axial direction, the outer circumference of the mounting sleeve is provided with an annular groove, the push rod passes through the guide hole and is inserted into the annular groove; the inner circumference of the linkage sleeve is provided with a plurality of linkage convex strips extending along the axial direction in a circular array, the two ends of the worm are respectively provided with a linkage shaft, the linkage shaft is provided with a first linkage groove matching with the linkage convex strip, the hand wheel is provided with a wheel axle, and the motor shaft of the motor and the wheel axle of the hand wheel are provided with a second linkage groove for matching with the corresponding linkage convex strip in the linkage sleeve.

By adopting the above technical solution, by operating the axial sliding of the linkage sleeve, the linkage or separation between the motor shaft and the worm and the linkage or separation between the wheel shaft and the worm can be achieved, and the operation is very convenient.

The utility model is further configured that the inner end of the push rod is in a dome shape.

By adopting the above technical solution, not only is the installation convenient, but also the contact area of the inner end of the push rod is small and the friction force is smaller.

The utility model is further configured such that the width of the guide hole is smaller than the diameter of the push rod, and a first positioning hole and a second positioning hole are provided in the guide hole. When the push rod is located in the first positioning hole, the linkage sleeve cooperates with the linkage shaft of the worm gear, and when the push rod is located in the second positioning hole, the linkage sleeve is separated from the linkage shaft of the worm gear.

By adopting the above technical solution, the push rod can be locked through the first positioning hole and the second positioning hole when the linkage sleeve is in the locked state and the separated state, so that it will not loosen or deviate in the corresponding state position, thereby ensuring the stability of the structure.

The utility model is further configured that the transmission switching mechanism also includes a guide rod, both ends of the guide rod are bent and connected to the corresponding outer wall of the mounting sleeve, and the push rod is provided with a guide hole matching the guide rod.

By adopting the above technical solution, the guide rod can not only guide the push rod to make its sliding more stable, but also limit the axial position of the push rod to prevent it from detaching.

The utility model is further configured such that an end cover is installed at the outer end of the mounting sleeve, a through hole is penetrated in the middle of the end cover, the axle of the hand wheel passes through the through hole corresponding to the end cover, two retaining springs are clamped on the axle, and the two retaining springs are respectively against the inner and outer sides of the end cover.

By adopting the above technical solution, the wheel axle can be installed and axially limited at the same time, the installation structure is simple and reliable, and disassembly and assembly are very convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a schematic diagram of the structure of the transmission switching mechanism of the present utility model;

FIG3 is a schematic diagram of the structure of the guide hole of the utility model.

In the figure: 1. valve body; 2. valve cover; 3. valve stem; 4. gate; 5. valve seat; 6. bracket; 7. worm gear reducer; 8. motor; 9. hand wheel; 10. housing; 11. mounting sleeve; 12. transmission switching mechanism; 13. worm; 14. push rod; 15. linkage sleeve; 16. guide hole; 17. annular groove; 18. linkage convex strip; 19. linkage shaft; 20. first linkage groove; 21. axle; 22. second linkage groove; 23. first positioning hole; 24. second positioning hole; 25. guide rod; 26. guide hole; 27. end cover; 28. through hole; 29. retaining spring.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Embodiment: A manual-automatic gate valve as shown in Figures 1 to 3 includes a valve body 1, a valve cover 2, a valve stem 3 and a gate plate 4. The valve cover 2 is installed on the upper part of the valve body 1, the valve stem 3 penetrates the valve cover 2, and the inner end of the valve stem 3 is linked with the gate plate 4. A valve seat 5 is provided in the valve body 1 for forming a sealing fit with the gate plate 4 when the valve is closed; the valve also includes a bracket 6, a worm gear reducer 7, a motor 8 and a handwheel 9. The bracket 6 is installed on the valve cover 2, and the worm gear reducer 7 is installed on the bracket 6, the output end of the worm gear reducer 7 is linked with the valve stem 3, and a mounting sleeve 11 is respectively provided on both sides of the housing 10 of the worm gear reducer 7, the mounting sleeve 11 and the housing 10 are an integrated structure, and the interior of the mounting sleeve 11 is connected with the interior of the housing 10, the motor 8 and the handwheel 9 are respectively installed on the corresponding mounting sleeve 11, and the motor 8 and the handwheel 9 are respectively connected to the two ends of the worm 13 of the worm gear reducer 7 through a transmission switching mechanism 12. In addition, the manual-automatic integrated structure can also be used on the stop valve. In daily use, the motor 8 can be used to provide power for the opening and closing of the valve. When the valve fails, the motor 8 is driven to disengage from the worm gear reducer 7 by operating a transmission switching mechanism 12, and the handwheel 9 is driven to form a linkage with the worm gear reducer 7 by operating another transmission switching mechanism 12, and the valve can be driven to open and close by the handwheel 9. The manual and automatic operation are integrated, and the manual and automatic operation can be switched freely. When the automatic operation fails, the manual operation can be switched in time to open and close the valve, which has the advantages of convenient and safe use. In addition, using the motor 8 as a power source can also greatly reduce the overall volume of the valve.

As shown in Figure 2, the transmission switching mechanism 12 includes a push rod 14 and a linkage sleeve 15, the linkage sleeve 15 is slidably arranged in the mounting sleeve 11, the outer periphery of the linkage sleeve 15 is fitted with the inner periphery of the mounting sleeve 11, the mounting sleeve 11 is axially penetrated with a guide hole 16, the extension direction of the guide hole 16 is the same as the extension direction of the central axis of the linkage sleeve 15, the outer periphery of the mounting sleeve 11 is provided with an annular groove 17, the push rod 14 penetrates the guide hole 16 and is inserted into the annular groove 17; the inner periphery of the linkage sleeve 15 is provided with a plurality of axially extending linkage convex strips 18 in a circumferential array, the two ends of the worm 13 are respectively provided with a linkage shaft 19, the linkage shaft 19 is provided with a first linkage groove 20 matched with the linkage convex strip 18, the hand wheel 9 is provided with a wheel shaft 21, and the motor 8 shaft of the motor 8 and the wheel shaft 21 of the hand wheel 9 are provided with a second linkage groove 22 for matching with the linkage convex strip 18 in the corresponding linkage sleeve 15. By operating the axial sliding of the linkage sleeve 15, the linkage or separation between the motor 8 shaft and the worm 13 and the linkage or separation between the wheel shaft 21 and the worm 13 can be achieved, and the operation is very convenient.

The inner end of the push rod 14 is dome-shaped, which is not only easy to install, but also has a small contact area at the inner end of the push rod 14, resulting in less friction.

As shown in Figures 2 and 3, the width of the guide hole 16 is smaller than the diameter of the push rod 14 (the width of the guide hole 16 is slightly smaller than the diameter of the push rod 14), and a first positioning hole 23 and a second positioning hole 24 are provided in the guide hole 16. When the push rod 14 is located in the first positioning hole 23, the linkage sleeve 15 is linked with the linkage shaft 19 of the worm 13, and when the push rod 14 is located in the second positioning hole 24, the linkage sleeve 15 is separated from the linkage shaft 19 of the worm 13. Through the first positioning hole 23 and the second positioning hole 24, the push rod 14 can be locked in the two positions of the linkage sleeve 15 in the locked state and the separated state, so that it will not be loosened or offset in the corresponding state position, thereby ensuring the stability of the structure.

As shown in FIG. 2 , the transmission switching mechanism 12 further includes a guide rod 25, the two ends of which are bent and connected to the outer wall of the corresponding mounting sleeve 11 (can be plugged in with interference fit or welded), and the push rod 14 is provided with a guide hole 26 that matches the guide rod 25. The guide rod 25 can not only guide the push rod 14 to make its sliding more stable, but also limit the axial position of the push rod 14 to prevent it from being separated.

As shown in FIG. 2 , an end cap 27 is installed at the outer end of the mounting sleeve 11, a through hole 28 is provided in the middle of the end cap 27, the wheel axle 21 of the hand wheel 9 passes through the through hole 28 of the corresponding end cap 27, two retaining springs 29 are clamped on the wheel axle 21, and the two retaining springs 29 are respectively against the inner and outer sides of the end cap 27. This design can realize the installation of the wheel axle 21 and limit its axial position at the same time, the installation structure is simple and reliable, and the disassembly and assembly are very convenient.

Claims (6)

1. A manual-automatic gate valve, comprising a valve body (1), a valve cover (2), a valve stem (3) and a gate plate (4), wherein the valve cover (2) is mounted on the upper part of the valve body (1), the valve stem (3) passes through the valve cover (2), and the inner end of the valve stem (3) is linked to the gate plate (4), and a valve seat (5) is provided in the valve body (1) for forming a sealing fit with the gate plate (4) when the valve is closed; characterized in that: it also includes a bracket (6), a worm gear reducer (7), a motor (8) and a hand wheel (9), wherein the bracket (6) is arranged The worm gear reducer (7) is mounted on the valve cover (2), the worm gear reducer (7) is mounted on the bracket (6), the output end of the worm gear reducer (7) is linked to the valve stem (3), a mounting sleeve (11) is provided on both sides of the housing (10) of the worm gear reducer (7), the motor (8) and the hand wheel (9) are respectively mounted on the corresponding mounting sleeves (11), and the motor (8) and the hand wheel (9) are respectively connected to the two ends of the worm (13) of the worm gear reducer (7) through a transmission switching mechanism (12). 2. A manual-automatic gate valve according to claim 1, characterized in that: the transmission switching mechanism (12) comprises a push rod (14) and a linkage sleeve (15), the linkage sleeve (15) is slidably arranged in the mounting sleeve (11), the mounting sleeve (11) is provided with a guide hole (16) along the axial direction, the outer periphery of the mounting sleeve (11) is provided with an annular groove (17), the push rod (14) passes through the guide hole (16) and is inserted into the annular groove (17); the inner periphery of the linkage sleeve (15) is A plurality of linkage ridges (18) extending in the axial direction are arranged in a circular array, a linkage shaft (19) is respectively arranged at both ends of the worm (13), a first linkage groove (20) is arranged on the linkage shaft (19) and is matched with the linkage ridges (18), a wheel shaft (21) is arranged on the hand wheel (9), and a second linkage groove (22) for matching with the linkage ridges (18) in the corresponding linkage sleeve (15) is arranged on the motor (8) shaft of the motor (8) and the wheel shaft (21) of the hand wheel (9). 3. A manual-automatic gate valve according to claim 2, characterized in that the inner end of the push rod (14) is dome-shaped. 4. A manual-automatic gate valve according to claim 2, characterized in that: the width of the guide hole (16) is smaller than the diameter of the push rod (14), and a first positioning hole (23) and a second positioning hole (24) are provided in the guide hole (16); when the push rod (14) is located in the first positioning hole (23), the linkage sleeve (15) cooperates with the linkage shaft (19) of the worm (13); when the push rod (14) is located in the second positioning hole (24), the linkage sleeve (15) is separated from the linkage shaft (19) of the worm (13). 5. A manual-automatic gate valve according to claim 2, characterized in that: the transmission switching mechanism (12) also includes a guide rod (25), the two ends of the guide rod (25) are bent and connected to the outer wall of the corresponding mounting sleeve (11), and the push rod (14) is provided with a guide hole (26) that matches the guide rod (25). 6. A manual-automatic gate valve according to claim 1, characterized in that: an end cover (27) is installed at the outer end of the mounting sleeve (11), a through hole (28) is penetrated through the middle of the end cover (27), the axle (21) of the hand wheel (9) passes through the through hole (28) of the corresponding end cover (27), two retaining springs (29) are clamped on the axle (21), and the two retaining springs (29) are respectively abutted against the inner and outer sides of the end cover (27).