Valve driving device

Abstract

The utility model discloses a valve driving device which comprises a base, an upper cover, a valve rod nut, a bevel gear impact disc and a transmission shaft, the upper cover is installed on the upper portion of the base, the valve rod nut is arranged in the base, the bevel gear impact disc is arranged in the upper cover, and the bevel gear impact disc is in linkage connection with the valve rod nut through a transmission piece. The transmission shaft penetrates through the side part of the upper cover; a bevel gear part meshed with the upper end of the bevel gear impact disc is arranged at the inner end of the transmission shaft; a cylindrical rotating part is arranged at the inner end of the transmission shaft, a rotating groove is formed in the inner end of the upper cover, the cylindrical rotating part is rotationally arranged in the rotating groove, a first bearing is clamped between the transmission shaft and the upper cover, and a second bearing is clamped between the cylindrical rotating part and the upper cover; the first bearing and the second bearing are arranged on the two sides of the bevel gear part respectively. The torque of the transmission shaft can be greatly reduced, operation is easier, and the service life of the device can be remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission devices, in particular to a valve driving device. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are usually controlled by valve control systems. Valve drive devices are indispensable drive devices for realizing valve program control, automatic control and remote control. Their movement process can be controlled by the size of stroke, torque or axial thrust.

[0003] The existing valve drive device usually includes a shell, which is composed of an upper cover and a base. The shell is provided with a disc gear, a transmission member, a copper nut and a bevel gear. The bevel gear meshes with the disc gear, and the copper nut meshes with the valve stem. The disc gear and the copper nut are connected by a transmission member. Among them, there are two ball bearings arranged side by side on the transmission shaft of the existing bevel gear, which are supported on one side of the transmission shaft. When the transmission shaft rotates, the force is unilateral. The unilateral force will greatly increase the torque, which will not only reduce the service life of the device, but also make the opening and closing operation of the valve more laborious. Utility Model Content

[0004] The purpose of the utility model is to provide a valve driving device, which can significantly reduce the torque of the transmission shaft, not only making the operation easier, but also significantly improving the service life of the device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve drive device, comprising a base, an upper cover, a valve stem nut, a bevel gear impact plate, and a transmission shaft, wherein the upper cover is installed on the upper part of the base, the valve stem nut is arranged in the base, the bevel gear impact plate is arranged in the upper cover, the bevel gear impact plate and the valve stem nut are linked and connected through a transmission member, the transmission shaft is passed through the side of the upper cover, and the inner end of the transmission shaft is provided with a bevel gear portion meshing with the upper end of the bevel gear impact plate; the inner end of the transmission shaft is provided with a cylindrical rotating portion, the inner end of the upper cover is provided with a rotating groove, the cylindrical rotating portion is rotatably arranged in the rotating groove, a first bearing is sandwiched between the transmission shaft and the upper cover, a second bearing is sandwiched between the cylindrical rotating portion and the upper cover, and the first bearing and the second bearing are respectively arranged on both sides of the bevel gear portion.

[0006] By adopting the above technical solution, a structure in which two bearings are installed on both sides of the force point (bevel gear part) can be used to reduce the force on the bearings and greatly reduce the torque of the transmission shaft. This not only makes operation easier, but also significantly improves the service life of the device.

[0007] The utility model is further configured such that a first step is provided at the open end of the side of the upper cover, a second step is provided on the transmission shaft, the first step and the second step are on the same vertical plane, a cover plate is also installed at the open end of the side of the upper cover, and a retaining spring is clamped on the transmission shaft; the cover plate and the retaining spring are both tightly pressed against the outer end of the first bearing, and the first step and the second step are both tightly pressed against the inner end of the first bearing.

[0008] By adopting the above technical solution, the positioning installation of the first bearing can be achieved, the installation structure is simple and reliable, the force is evenly distributed, and the disassembly and assembly are very convenient.

[0009] The utility model is further configured such that the bevel gear portion presses the second bearing tightly against the rotation groove.

[0010] By adopting the above technical solution, the positioning installation of the second bearing can be achieved, the installation structure is simple and reliable, and the disassembly and assembly is very convenient.

[0011] The utility model is further configured that an oil filling hole connected with the rotating groove is opened on the outer side of the upper cover, and a fuel filling nozzle is installed on the outer end of the oil filling hole.

[0012] By adopting the above technical solution, grease is injected into the rotating groove through the oiling nozzle, so as to lubricate the second bearing, reduce its friction and increase its service life.

[0013] The utility model is further configured such that a first annular groove is provided at the upper end of the base, a second annular groove is provided at the lower end of the bevel gear impact plate, the first annular groove and the second annular groove are combined to form an annular rolling cavity, and a plurality of balls are rolled in the annular rolling cavity.

[0014] By adopting the above technical solution, the friction force on which the bevel gear impacts the disk during transmission can be significantly reduced, thereby further reducing the torque.

[0015] The utility model is further configured as follows: the transmission member includes an impact ring, which is rotatably arranged between the upper cover and the base, the inner side of the impact ring is provided with a plurality of first linkage teeth distributed in a circular array, the outer periphery of the valve stem nut is provided with a plurality of second linkage teeth meshing with the first linkage teeth; the inner periphery of the bevel gear impact disk is provided with a plurality of transmission protrusions, and the outer periphery of the impact ring is provided with a plurality of transmission grooves matching with the transmission protrusions.

[0016] By adopting the above technical solution, stable transmission from the bevel gear impact plate to the valve stem nut can be achieved.

[0017] The utility model is further configured such that a first positioning groove is provided on the inner side of the upper cover, a second positioning groove is provided on the inner side of the base, and the upper and lower ends of the impact ring are respectively embedded in the first positioning groove and the second positioning groove.

[0018] By adopting the above technical solution, the impact ring can be positioned so that it can only rotate in the circumferential direction, and the positioning structure is very simple. The positioning installation of the impact ring can be achieved by simply connecting the upper cover with the base.

[0019] The utility model is further configured such that a limiting flange is provided on the outer periphery of the valve stem nut, a limiting groove is provided on the lower end of the base, the limiting flange is rotatably arranged in the limiting groove, and a bottom cover for limiting the limiting flange in the limiting groove is also installed at the bottom of the base.

[0020] By adopting the above technical solution, the valve stem nut can be positioned so that it can only rotate in the circumferential direction, and the positioning structure is very simple. The positioning installation of the valve stem nut can be achieved by simply connecting the bottom cover to the base.

[0021] The utility model is further configured such that a plane bearing is respectively sandwiched between the limit flange and the inner end of the limit groove and between the limit flange and the inner end of the bottom cover, and both ends of the plane bearing located at the upper part are respectively in full-plane contact with the inner end of the limit groove and the upper end of the limit flange, and both ends of the plane bearing located at the lower part are respectively in full-plane contact with the lower end of the limit flange and the inner end of the bottom cover.

[0022] By adopting the above technical scheme, not only can the friction force during the rotation of the valve stem nut be significantly reduced, but also compared with the prior art, since the plane bearing used has only half of the force-bearing surface, if the force is too large during use, the plane bearing will be deformed, which will increase friction, increase torque and reduce service life. This scheme adopts upper and lower plane bearings to bear force on the entire plane, which can significantly reduce torque and increase the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0025] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle B part;

[0026] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part C in the middle.

[0027] In the figure: 1. base; 2. upper cover; 3. valve stem nut; 4. bevel gear impact plate; 5. transmission shaft; 6. bevel gear portion; 7. cylindrical rotating portion; 8. rotating groove; 9. first bearing; 10. second bearing; 11. first step; 12. second step; 13. cover plate; 14. retaining ring; 15. oil filling hole; 16. oiling nozzle; 17. first annular groove; 18. second annular groove; 19. annular rolling cavity; 20. ball; 21. impact ring; 22. first linkage tooth; 23. second linkage tooth; 24. transmission protrusion; 25. transmission groove; 26. first positioning groove; 27. second positioning groove; 28. limiting flange; 29. ​​limiting groove; 30. bottom cover; 31. plane bearing. DETAILED DESCRIPTION

[0028] 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.

[0029] Example: As attached Figures 1 to 4 The valve driving device shown in the figure comprises a base 1, an upper cover 2, a valve stem nut 3, a bevel gear impact plate 4, and a transmission shaft 5. The upper cover 2 is installed on the upper part of the base 1, and the two can be connected by screws. The valve stem nut 3 is arranged in the base 1, and the bevel gear impact plate 4 is arranged in the upper cover 2. The bevel gear impact plate 4 and the valve stem nut 3 are linked and connected through a transmission member. The transmission shaft 5 is penetrated through the side of the upper cover 2, and the inner end of the transmission shaft 5 is provided with a bevel gear portion 6 meshing with the upper end of the bevel gear impact plate 4; the inner end of the transmission shaft 5 is provided with The cylindrical rotating part 7 is coaxially arranged with the transmission shaft 5, and the two are an integrated structure. The inner end of the upper cover 2 is provided with a rotation groove 8, and the rotation groove 8 is cylindrical. The cylindrical rotating part 7 is rotatably arranged in the rotation groove 8. A first bearing 9 is sandwiched between the transmission shaft 5 and the upper cover 2. A second bearing 10 is sandwiched between the cylindrical rotating part 7 and the upper cover 2, and the first bearing 9 and the second bearing 10 are respectively arranged on both sides of the bevel gear part 6. The first bearing 9 and the second bearing 10 are both ball bearings 20. The structure of two bearings installed on both sides of the force point (bevel gear part 6) can make the bearing force smaller and can greatly reduce the torque of the transmission shaft 5. It is not only easier to operate, but also can significantly improve the service life of the device.

[0030] As attached Figure 1 and attached Figure 2As shown, the open end of the side of the upper cover 2 is provided with a first step 11, and the transmission shaft 5 is provided with a second step 12, the first step 11 and the second step 12 are on the same vertical plane, and a cover plate 13 is also installed at the open end of the side of the upper cover 2, and the two can be connected by screws, and a retaining spring 14 is clamped on the transmission shaft 5, that is, a clamping groove is provided on the transmission shaft 5, and the retaining spring 14 is clamped in the clamping groove; the cover plate 13 and the retaining spring 14 are both tightly pressed against the outer end of the first bearing 9, and the first step 11 and the second step 12 are both tightly pressed against the inner end of the first bearing 9. This design can realize the positioning installation of the first bearing 9, the installation structure is simple and reliable, the force is evenly applied, and the disassembly and assembly are very convenient.

[0031] As attached Figure 2 As shown, the bevel gear portion 6 presses the second bearing 10 tightly against the rotation groove 8. This design can realize the positioning installation of the second bearing 10, the installation structure is simple and reliable, and the disassembly and assembly are very convenient.

[0032] As attached Figure 1 and attached Figure 3 As shown, the upper cover 2 is provided with an oil filling hole 15 connected to the rotating groove 8 on the outer side, and a grease nozzle 16 is installed at the outer end of the oil filling hole 15, and the grease nozzle 16 can be threadedly connected to the outer end of the oil filling hole 15. Grease is injected into the rotating groove 8 through the grease nozzle 16 to lubricate the second bearing 10, reduce its friction, and increase its service life.

[0033] As attached Figure 1 and attached Figure 4 As shown, the upper end of the base 1 is provided with a first annular groove 17, and the lower end of the bevel gear impact plate 4 is provided with a second annular groove 18. The first annular groove 17 and the second annular groove 18 are combined to form an annular rolling cavity 19, and a plurality of balls 20 are rollingly arranged in the annular rolling cavity 19. This design can significantly reduce the friction force of the bevel gear impact plate 4 during transmission, thereby further reducing the torque.

[0034] As attached Figure 1 As shown, the transmission member includes an impact ring 21, which is rotatably arranged between the upper cover 2 and the base 1, and a plurality of first linkage teeth 22 are distributed in a circumferential array on the inner side of the impact ring 21, and a plurality of second linkage teeth 23 meshing with the first linkage teeth 22 are arranged on the outer periphery of the valve stem nut 3; a plurality of transmission protrusions 24 are arranged on the inner periphery of the bevel gear impact plate 4, and a plurality of transmission grooves 25 matching with the transmission protrusions 24 are arranged on the outer periphery of the impact ring 21. This design can realize stable transmission from the bevel gear impact plate 4 to the valve stem nut 3.

[0035] As attached Figure 1As shown, the inner side of the upper cover 2 is provided with a first positioning groove 26, the inner side of the base 1 is provided with a second positioning groove 27, and the upper and lower ends of the impact ring 21 are respectively embedded in the first positioning groove 26 and the second positioning groove 27. This design can realize the positioning of the impact ring 21, so that it can only rotate in the circumferential direction, and the positioning structure is very simple. It only needs to connect the upper cover 2 with the base 1 to realize the positioning and installation of the impact ring 21.

[0036] As attached Figure 1 As shown, the outer periphery of the valve stem nut 3 is provided with a limiting flange 28, and the limiting flange 28 is an annular structure. The lower end of the base 1 is provided with a limiting groove 29, and the limiting flange 28 is rotatably arranged in the limiting groove 29. A bottom cover 30 for limiting the limiting flange 28 in the limiting groove 29 is also installed at the bottom of the base 1. The bottom cover 30 can be connected to the base 1 by screws. This design can realize the positioning of the valve stem nut 3 so that it can only rotate in the circumferential direction, and the positioning structure is very simple. It only needs to connect the bottom cover 30 with the base 1 to realize the positioning and installation of the valve stem nut 3.

[0037] As attached Figure 1 As shown, a plane bearing 31 is sandwiched between the limit flange 28 and the inner end of the limit groove 29 and between the limit flange 28 and the inner end of the bottom cover 30, and the two ends of the upper plane bearing 31 are in full plane contact with the inner end of the limit groove 29 and the upper end of the limit flange 28, respectively, and the two ends of the lower plane bearing 31 are in full plane contact with the lower end of the limit flange 28 and the inner end of the bottom cover 30. This design can not only significantly reduce the friction when the valve stem nut 3 rotates, but also, compared with the prior art, since the plane bearing 31 used has only half of the force-bearing surface, if the force is too large during use, the plane bearing 31 will be deformed, increase friction, increase torque and reduce service life. This solution adopts the upper and lower plane bearings 31 to bear force on the whole plane, which can significantly reduce torque and increase the service life of the device.

Claims

1. A valve driving device, comprising a base (1), an upper cover (2), a valve stem nut (3), a bevel gear impact plate (4), and a transmission shaft (5), wherein the upper cover (2) is mounted on the upper part of the base (1), the valve stem nut (3) is arranged in the base (1), the bevel gear impact plate (4) is arranged in the upper cover (2), the bevel gear impact plate (4) and the valve stem nut (3) are linked and connected through a transmission member, the transmission shaft (5) is passed through the side of the upper cover (2), and the inner end of the transmission shaft (5) is provided with a bevel gear portion (6) meshing with the upper end of the bevel gear impact plate (4); characterized in that: The inner end of the transmission shaft (5) is provided with a cylindrical rotating part (7), the inner end of the upper cover (2) is provided with a rotating groove (8), the cylindrical rotating part (7) is rotatably arranged in the rotating groove (8), a first bearing (9) is sandwiched between the transmission shaft (5) and the upper cover (2), a second bearing (10) is sandwiched between the cylindrical rotating part (7) and the upper cover (2), and the first bearing (9) and the second bearing (10) are respectively arranged on both sides of the bevel gear part (6).

2. The valve driving device according to claim 1, characterized in that: A first step (11) is provided at the open end of the side of the upper cover (2), and a second step (12) is provided on the transmission shaft (5); the first step (11) and the second step (12) are on the same vertical plane; a cover plate (13) is also installed at the open end of the side of the upper cover (2), and a retaining spring (14) is clamped on the transmission shaft (5); the cover plate (13) and the retaining spring (14) are both tightly abutted against the outer end of the first bearing (9), and the first step (11) and the second step (12) are both tightly abutted against the inner end of the first bearing (9).

3. The valve driving device according to claim 2, characterized in that: The bevel gear portion (6) presses the second bearing (10) tightly against the rotation groove (8).

4. The valve driving device according to claim 3, characterized in that: An oil filling hole (15) communicating with the rotating groove (8) is provided on the outer side of the upper cover (2), and an oil filling nozzle (16) is installed at the outer end of the oil filling hole (15).

5. The valve driving device according to claim 1, characterized in that: The upper end of the base (1) is provided with a first annular groove (17), and the lower end of the bevel gear impact plate (4) is provided with a second annular groove (18). The first annular groove (17) and the second annular groove (18) are combined to form an annular rolling cavity (19), and a plurality of balls (20) are rollingly arranged in the annular rolling cavity (19).

6. The valve driving device according to claim 1, characterized in that: The transmission member comprises an impact ring (21), the impact ring (21) is rotatably arranged between the upper cover (2) and the base (1), a plurality of first linkage teeth (22) are distributed in a circumferential array on the inner side of the impact ring (21), a plurality of second linkage teeth (23) meshing with the first linkage teeth (22) are arranged on the outer periphery of the valve stem nut (3); a plurality of transmission protrusions (24) are arranged on the inner periphery of the bevel gear impact plate (4), and a plurality of transmission grooves (25) matching with the transmission protrusions (24) are arranged on the outer periphery of the impact ring (21).

7. The valve driving device according to claim 6, characterized in that: A first positioning groove (26) is provided on the inner side of the upper cover (2), a second positioning groove (27) is provided on the inner side of the base (1), and the upper and lower ends of the impact ring (21) are respectively embedded in the first positioning groove (26) and the second positioning groove (27).

8. The valve driving device according to claim 1, characterized in that: The valve stem nut (3) is provided with a limiting flange (28) on its outer periphery, and the base (1) is provided with a limiting groove (29) at its lower end. The limiting flange (28) is rotatably arranged in the limiting groove (29), and a bottom cover (30) for limiting the limiting flange (28) in the limiting groove (29) is also installed at the bottom of the base (1).

9. The valve driving device according to claim 8, characterized in that: A plane bearing (31) is respectively sandwiched between the limiting flange (28) and the inner end of the limiting groove (29) and between the limiting flange (28) and the inner end of the bottom cover (30), and two ends of the plane bearing (31) located at the upper part are in full-plane contact with the inner end of the limiting groove (29) and the upper end of the limiting flange (28), and two ends of the plane bearing (31) located at the lower part are in full-plane contact with the lower end of the limiting flange (28) and the inner end of the bottom cover (30).

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