Bevel gear valve driving device

Abstract

The utility model discloses a bevel gear 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, the bevel gear impact disc is in linkage connection with the valve rod nut through a transmission piece, and the transmission shaft is connected with the 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 plurality of balls are distributed between the lower end of the bevel gear impact disc and the upper end of the base in a circumferential array mode, and gaps are formed between the upper end of the bevel gear impact disc and the inner side of the upper cover, between the periphery of the bevel gear impact disc and the inner side of the upper cover and between the lower end of the bevel gear impact disc and the upper end of the base. According to the utility model, the torque can be greatly reduced, the operation is easier, and the service life of the device can be obviously prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission devices, in particular to a bevel gear 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 bevel gear valve drive device usually includes a shell, which is composed of an upper cover and a base. The shell is provided with disc teeth, a transmission member, a copper nut and a bevel gear. The bevel gear is meshed with the disc teeth, and the copper nut is meshed with the valve stem. The disc teeth and the copper nut are connected by a transmission member. The shell includes an upper cover and a base, and the disc teeth are positioned between the upper cover and the base. Since the disc teeth are subjected to unilateral force when rotating, the displacement of the disc teeth and the positioning of the base and the upper cover generate sliding friction, which greatly increases the torque. Therefore, not only is the operation more laborious, but also the service life is reduced. Utility Model Content

[0004] The purpose of the utility model is to provide a bevel gear valve driving device, which can significantly reduce torque, 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 bevel gear valve drive device, comprising a base, an upper cover, a valve stem nut, a bevel gear impact disk, 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 disk is arranged in the upper cover, the bevel gear impact disk 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 tooth portion meshing with the upper end of the bevel gear impact disk; a plurality of ball bearings are distributed in a circular array between the lower end of the bevel gear impact disk and the upper end of the base, and gaps are provided between the upper end of the bevel gear impact disk and the inner side of the upper cover, between the outer periphery of the bevel gear impact disk and the inner side of the upper cover, and between the lower end of the bevel gear impact disk and the upper end of the base.

[0006] By adopting the above technical solution, the friction force on the bevel gear impact plate during transmission can be significantly reduced, thereby greatly reducing the torque, which not only makes the operation easier but also significantly improves the service life of the device.

[0007] 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 the ball rolling is arranged in the annular rolling cavity.

[0008] By adopting the above technical solution, the ball can be well positioned so that the ball can roll along a specific track.

[0009] The utility model is further configured such that an annular positioning flange is provided at the lower end of the bevel gear impact plate, an annular positioning recess corresponding to the annular positioning flange is provided at the upper end of the base, the first annular groove is provided at the junction of the lower end of the bevel gear impact plate and the annular positioning flange, and the second annular groove is provided at the junction of the upper end of the base and the annular positioning recess.

[0010] By adopting the above technical solution, while positioning the ball, the bevel gear impact plate can also be positioned, further improving the stability of the device operation.

[0011] The utility model is further configured as follows: the transmission member includes an impact nut, which is rotatably arranged in the base, and the inner side of the impact nut is provided with a plurality of first linkage teeth distributed in a circular array, and 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 plate is provided with a plurality of transmission protrusions, and the outer periphery of the impact nut is provided with a plurality of transmission grooves matching with the transmission protrusions.

[0012] By adopting the above technical solution, stable transmission from the bevel gear impact plate to the valve stem nut can be achieved.

[0013] The utility model is further configured such that a first limiting flange is also provided on the outer periphery of the impact nut, a first limiting step is provided on the inner side of the base, and a bottom cover for pressing the first limiting flange against the first limiting step is also installed at the lower end of the base.

[0014] By adopting the above technical solution, the impact nut can be positioned so that it can only rotate in the circumferential direction.

[0015] The utility model is further configured such that a plane bearing is respectively sandwiched between the first limiting flange and the first limiting step and between the first limiting flange and the bottom cover, and both ends of the plane bearing located at the upper part are respectively in full-plane contact with the first limiting step and the first limiting flange, and both ends of the plane bearing located at the lower part are respectively in full-plane contact with the first limiting flange and the bottom cover.

[0016] By adopting the above technical scheme, not only can the friction force when the impact nut rotates 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 the 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.

[0017] The utility model is further configured such that a second limiting flange is provided on the outer periphery of the valve stem nut, a second limiting step is provided on the inner periphery of the impact nut, and a nut gland is threadedly connected on the inner side of the impact nut for pressing the second limiting flange onto the second limiting step, and the number of the nut glands is two, and the two nut glands are pressed against each other.

[0018] By adopting the above technical solution, the positioning installation of the valve stem nut can be achieved, and the installation structure is simple and reliable, and the disassembly and assembly are very convenient.

[0019] The utility model is further configured that a plurality of operating grooves are distributed in a circumferential array on the upper end of the nut gland, and the operating grooves are arranged on the inner circle of the nut gland.

[0020] By adopting the above technical solution, it is convenient for operators to perform rotating operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0023] Figure 3 It is an exploded view of the matching structure of the bevel gear impact plate, the impact nut and the valve stem nut;

[0024] Figure 4 It is a structural schematic diagram of the nut gland of the utility model.

[0025] 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. ball; 8. first annular groove; 9. second annular groove; 10. annular rolling cavity; 11. annular positioning flange; 12. annular positioning recess; 13. impact nut; 14. first linkage tooth; 15. second linkage tooth; 16. transmission protrusion; 17. transmission groove; 18. first limiting flange; 19. first limiting step; 20. bottom cover; 21. plane bearing; 22. second limiting flange; 23. second limiting step; 24. nut cover; 25. operating groove; 28. gap. DETAILED DESCRIPTION

[0026] 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.

[0027] Example: As attached Figures 1 to 3 The bevel gear valve driving device shown 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 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; a plurality of balls 7 are distributed in a circumferential array between the lower end of the bevel gear impact plate 4 and the upper end of the base 1, and a gap 28 is provided between the upper end of the bevel gear impact plate 4 and the inner side of the upper cover 2, between the outer periphery of the bevel gear impact plate 4 and the inner side of the upper cover 2, and between the lower end of the bevel gear impact plate 4 and the upper end of the base 1. This design can significantly reduce the friction force of the bevel gear impact plate 4 during transmission, thereby greatly reducing the torque, which not only makes the operation easier, but also significantly improves the service life of the device.

[0028] As attached Figure 2 As shown, the upper end of the base 1 is provided with a first annular groove 8, the lower end of the bevel gear impact plate 4 is provided with a second annular groove 9, the first annular groove 8 and the second annular groove 9 are combined to form an annular rolling cavity 10, and the ball 7 is rolled in the annular rolling cavity 10. This design can form a good positioning for the ball 7, so that the ball 7 can roll along a specific track.

[0029] As attached Figure 2 As shown, the lower end of the bevel gear impact plate 4 is provided with an annular positioning flange 11, the upper end of the base 1 is provided with an annular positioning recess 12 corresponding to the annular positioning flange 11, the first annular groove 8 is provided at the junction of the lower end of the bevel gear impact plate 4 and the annular positioning flange 11, and the second annular groove 9 is provided at the junction of the upper end of the base 1 and the annular positioning recess 12. While positioning the ball 7, the bevel gear impact plate 4 can also be positioned, further improving the stability of the device operation.

[0030] As attached Figure 1 and attached Figure 3As shown, the transmission member includes an impact nut 13, which is rotatably arranged in the base 1, and a plurality of first linkage teeth 14 are distributed in a circumferential array on the inner side of the impact nut 13, and a plurality of second linkage teeth 15 meshing with the first linkage teeth 14 are arranged on the outer periphery of the valve stem nut 3; a plurality of transmission protrusions 16 are arranged on the inner periphery of the bevel gear impact plate 4, and a plurality of transmission grooves 17 matching with the transmission protrusions 16 are arranged on the outer periphery of the impact nut 13, and the arc length of the transmission grooves 17 is greater than the arc length of the transmission protrusions 16. This design can realize stable transmission from the bevel gear impact plate 4 to the valve stem nut 3.

[0031] As attached Figure 1 As shown, the outer periphery of the impact nut 13 is further provided with a first limiting flange 18, the inner side of the base 1 is provided with a first limiting step 19, and the lower end of the base 1 is further provided with a bottom cover 20 for pressing the first limiting flange 18 against the first limiting step 19. This design can position the impact nut 13 so that it can only rotate in the circumferential direction.

[0032] As attached Figure 1 As shown, a plane bearing 21 is sandwiched between the first limiting flange 18 and the first limiting step 19 and between the first limiting flange 18 and the bottom cover 20, and the two ends of the upper plane bearing 21 are in full plane contact with the first limiting step 19 and the first limiting flange 18, respectively, and the two ends of the lower plane bearing 21 are in full plane contact with the first limiting flange 18 and the bottom cover 20. This design can not only significantly reduce the friction when the impact nut 13 rotates, but also, compared with the prior art, since the plane bearing 21 used has only half of the force-bearing surface, if the force is too large during use, the plane bearing 21 will be deformed, increase friction, increase torque and reduce service life. This solution adopts the upper and lower plane bearings 21 to bear force on the whole plane, which can significantly reduce torque and increase the service life of the device.

[0033] As attached Figure 1 As shown, the outer periphery of the valve stem nut 3 is provided with a second limiting flange 22, the inner periphery of the impact nut 13 is provided with a second limiting step 23, and the inner side of the impact nut 13 is threadedly connected with a nut gland 24 for pressing the second limiting flange 22 onto the second limiting step 23, that is, the inner side of the impact nut 13 has an internal thread, the outer periphery of the nut gland 24 has an external thread matching the internal thread, and the number of the nut glands 24 is two, and the two nut glands 24 are pressed against each other. This design can realize the positioning installation of the valve stem nut 3, and the installation structure is simple and reliable, and it is very convenient to disassemble and assemble.

[0034] As attached Figure 1 and attached Figure 4As shown, a plurality of operating grooves 25 are distributed in a circumferential array on the upper end of the nut gland 24, and the operating grooves 25 are arranged at the inner circle of the nut gland 24. This structure is convenient for operators to perform rotation operations.

Claims

1. A bevel gear 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: A plurality of balls (7) are distributed in a circular array between the lower end of the bevel gear impact plate (4) and the upper end of the base (1), and gaps (28) are provided between the upper end of the bevel gear impact plate (4) and the inner side of the upper cover (2), between the outer periphery of the bevel gear impact plate (4) and the inner side of the upper cover (2), and between the lower end of the bevel gear impact plate (4) and the upper end of the base (1).

2. The bevel gear valve driving device according to claim 1, characterized in that: The upper end of the base (1) is provided with a first annular groove (8), and the lower end of the bevel gear impact plate (4) is provided with a second annular groove (9). The first annular groove (8) and the second annular groove (9) are combined to form an annular rolling cavity (10), and the ball (7) is rolled in the annular rolling cavity (10).

3. The bevel gear valve driving device according to claim 2, characterized in that: The lower end of the bevel gear impact plate (4) is provided with an annular positioning flange (11), the upper end of the base (1) is provided with an annular positioning recess (12) corresponding to the annular positioning flange (11), the first annular groove (8) is provided at the junction of the lower end of the bevel gear impact plate (4) and the annular positioning flange (11), and the second annular groove (9) is provided at the junction of the upper end of the base (1) and the annular positioning recess (12).

4. The bevel gear valve driving device according to claim 1, characterized in that: The transmission member comprises an impact nut (13), the impact nut (13) is rotatably arranged in the base (1), a plurality of first linkage teeth (14) are distributed in a circumferential array on the inner side of the impact nut (13), a plurality of second linkage teeth (15) meshing with the first linkage teeth (14) are arranged on the outer periphery of the valve stem nut (3); a plurality of transmission protrusions (16) are arranged on the inner periphery of the bevel gear impact plate (4), and a plurality of transmission grooves (17) matching with the transmission protrusions (16) are arranged on the outer periphery of the impact nut (13).

5. The bevel gear valve driving device according to claim 4, characterized in that: The outer periphery of the impact nut (13) is also provided with a first limiting flange (18), the inner side of the base (1) is provided with a first limiting step (19), and the lower end of the base (1) is also provided with a bottom cover (20) for pressing the first limiting flange (18) against the first limiting step (19).

6. The bevel gear valve driving device according to claim 5, characterized in that: A plane bearing (21) is sandwiched between the first limiting flange (18) and the first limiting step (19) and between the first limiting flange (18) and the bottom cover (20), respectively, and two ends of the plane bearing (21) located at the upper part are in full-plane contact with the first limiting step (19) and the first limiting flange (18), respectively, and two ends of the plane bearing (21) located at the lower part are in full-plane contact with the first limiting flange (18) and the bottom cover (20), respectively.

7. The bevel gear valve driving device according to claim 4, characterized in that: The valve stem nut (3) is provided with a second limiting flange (22) on its outer periphery, the impact nut (13) is provided with a second limiting step (23) on its inner periphery, and the impact nut (13) is threadedly connected on the inner side with a nut cover (24) for pressing the second limiting flange (22) onto the second limiting step (23), and the number of the nut covers (24) is two, and the two nut covers (24) are pressed against each other.

8. The bevel gear valve driving device according to claim 7, characterized in that: A plurality of operating grooves (25) are distributed in a circumferential array on the upper end of the nut gland (24), and the operating grooves (25) are arranged on the inner circle of the nut gland (24).

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