Large-torque valve shaft transmission device

Abstract

The utility model belongs to the technical field of valve shaft transmission, and particularly relates to a large-torque valve shaft transmission device which comprises a crank, the top of the front end of the crank is connected with a valve body, a valve shaft is arranged on the valve body, a crank gland is connected to the position, corresponding to the valve shaft, of the front end of the crank, and the crank gland is in threaded fit with the crank through a bolt and a gasket. The upper plane of the valve shaft is parallel to the crank gland, the valve shaft is inserted into the shaft hole of the crank, the upper plane of the valve shaft is parallel to the crank gland, and the crank gland is locked on the crank, so that the valve shaft, the crank gland and the crank form a whole to transmit torque, the large plane between the crank gland and the valve shaft is used for driving, the stress area is large, and deformation is not prone to occurring; safety and reliability are achieved, and the using working conditions of large-diameter valves and high-pressure valves are completely met.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve shaft drive technical field, concretely is a big torque valve shaft transmission device. BACKGROUND

[0002] Generally, the crank and valve shaft transmission torque usually adopts pin or key connection mode. In the valve opening and closing process, the torque is conducted through the pin or key, at this time, the pin or key bears the shear force and torsional stress in the valve shaft rotation direction. When the pin or key connection mode is applied to the large-diameter valve and high-pressure valve, the opening and closing torque of the valve is very large, the pin or key will bear excessive shear force and torsional stress, thereby causing the pin or key to deform and the torque transmission to fail. If the size of the pin (key) is increased, the strength of the valve shaft will be reduced; if the size of the valve shaft is increased, the cost of the product will be increased. Therefore, it is urgent to provide a big torque valve shaft transmission device. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] Therefore, the purpose of the utility model is to provide a big torque valve shaft transmission device, the valve shaft is inserted into the shaft hole of the crank, the upper surface of the valve shaft is arranged in parallel with the crank gland, the crank gland is locked on the crank, the valve shaft, the crank gland and the crank become a whole to transmit torque, the large plane between the crank gland and the valve shaft is driven, the stress area is large and not easy to deform, safe and reliable, fully meet the use conditions of large-diameter valves and high-pressure valves.

[0005] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0006] A big torque valve shaft transmission device comprises:

[0007] The crank as the force applying base is connected with the valve body at the top of the front end, and the valve shaft is arranged on the valve body.

[0008] As a preferred scheme of the big torque valve shaft transmission device, the front end of the crank is connected with the crank gland at the position corresponding to the valve shaft, the crank gland is screwed with the gasket and the crank, and the upper surface of the valve shaft is arranged in parallel with the crank gland.

[0009] As a preferred scheme of the big torque valve shaft transmission device, the front end of the crank is provided with the shaft hole, and the valve shaft extends to the position of the shaft hole and is connected with the crank.

[0010] As a preferred scheme of the large-torque valve shaft transmission device, the valve body is embedded with a bearing, the valve shaft is connected with the inner wall of the bearing, and rotates from the bearing.

[0011] As a preferred scheme of the large-torque valve shaft transmission device, a stuffing box is formed on the valve body, the stuffing box is filled with stuffing, and the valve body is provided with a stuffing gland at a position corresponding to the stuffing box.

[0012] As a preferred scheme of the large-torque valve shaft transmission device, the valve body is provided with a stuffing pad at a position corresponding to the contact surface of the stuffing gland.

[0013] As a preferred scheme of the large-torque valve shaft transmission device, the crank is provided with an anti-skid pad at a position corresponding to the handle.

[0014] Compared with the prior art, the large-torque valve shaft transmission device has the following beneficial effects:

[0015] The valve shaft is inserted into the shaft hole of the crank, the upper surface of the valve shaft is arranged in parallel with the crank gland, the crank gland is locked on the crank, the valve shaft, the crank gland and the crank become an integrated whole to transmit torque, the large-area flat surface between the crank gland and the valve shaft is driven, the stress area is large and the deformation is not easy, which is safe and reliable, and fully meets the use conditions of large-diameter valves and high-pressure valves. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the present application will be described in detail below in combination with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0017] Fig. 1 It is a schematic diagram of the overall structure of the present application;

[0018] Fig. 2 It is a schematic diagram of the crank assembly part of the present application.

[0019] In the figure: 1 crank, 2 valve shaft, 3 crank gland, 4 bolt, 5 gasket, 6 stuffing gland, 7 stuffing, 8 stuffing pad, 9 valve body, 10 bearing. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings.

[0021] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present application, therefore, the present application is not limited by the specific implementation disclosed below.

[0022] Secondly, the present application is described in detail in combination with the schematic diagram, in the detailed description of the present application, for the convenience of description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of the present application protection herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below in combination with the drawings.

[0024] The present application provides a large torque valve shaft transmission device, please refer to Figs. 1-2 , including, crank 1, valve shaft 2, crank gland 3, bolt 4, gasket 5, packing gland 6, packing box 7, packing pad 8, valve body 9 and bearing 10;

[0025] Please continue to refer to Figs. 1-2 , as the force base of crank 1, the front end of crank 1 is connected with valve body 9, and valve shaft 2 is arranged on valve body 9;

[0026] The front end of crank 1 is connected with crank gland 3 corresponding to the position of valve shaft 2, and the crank gland 3 is screwed with gasket 5 and crank 1, the upper surface of valve shaft 1 is arranged in parallel with crank gland 3, and the crank gland 3 is locked on the crank 1;

[0027] The front end of crank 1 is provided with shaft hole (not marked in the figure), valve shaft 2 extends to the shaft hole position and is connected with crank 1, bearing 10 is embedded in valve body 9, valve shaft 2 is connected with the inner wall of bearing 10 and rotates from bearing 10;

[0028] Valve body 9 is provided with packing box 7, packing box 7 is filled with packing (not marked in the figure), valve body 9 is provided with packing gland 6 corresponding to the position of packing box 7 on the outside, valve body 9 is provided with packing pad 8 corresponding to the contact surface of packing gland 6 on the outside, the packing is arranged in the packing box 7, and the packing is sealed by packing gland 6 and packing pad 8, so as to ensure the sealing property of valve body 9;

[0029] Insert valve shaft 2 into the shaft hole of crank 1, the upper plane of valve shaft 2 is arranged in parallel with crank gland 3, lock crank gland 3 on crank 1, make valve shaft 2, crank gland 3 and crank 1 into a whole to transmit torque, drive through the big plane between crank gland 3 and valve shaft 2, the stress area is big, not easy to deform, safe and reliable, fully meet the use condition of large-diameter valve and high-pressure valve.

[0030] Working principle: when using, insert valve shaft 2 into the shaft hole of crank 1, the upper plane of valve shaft 2 is arranged in parallel with crank gland 3, lock crank gland 3 on crank 1, make valve shaft 2, crank gland 3 and crank 1 into a whole to transmit torque, drive through the big plane between crank gland 3 and valve shaft 2, the stress area is big, not easy to deform, safe and reliable, fully meet the use condition of large-diameter valve and high-pressure valve.

[0031] Although the utility model has been described above with reference to the embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the features in the embodiments disclosed by the utility model can be combined in any way, and the combinations are not exhaustively described in the specification only for the purpose of saving space and resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A large torque valve shaft drive characterized by, Include: The crank (1) is connected with the valve body (9) at the top of the front end, and the valve shaft (2) is arranged on the valve body (9).

2. A large torque valve shaft drive as defined in claim 1, characterized in that The crank (1) is connected with the crank gland (3) at the front end corresponding to the position of the valve shaft (2), the crank gland (3) is screwed with the gasket (5) and the crank (1) through the bolt (4), and the upper surface of the valve shaft (2) is arranged in parallel with the crank gland (3).

3. A large torque valve shaft drive as defined in claim 1, wherein, The crank (1) is provided with an axle hole at the front end, the valve shaft (2) extends to the position of the axle hole and is connected with the crank (1).

4. A large torque valve shaft drive as defined in claim 1, wherein, The bearing (10) is embedded in the valve body (9), the valve shaft (2) is connected with the inner wall of the bearing (10), and rotates from the bearing (10).

5. A large torque valve shaft drive as defined in claim 1, wherein, The valve body (9) is provided with a stuffing box (7), the stuffing box (7) is filled with stuffing, and the valve body (9) is provided with a stuffing gland (6) outside the position corresponding to the stuffing box (7).

6. A large torque valve shaft drive as defined in claim 1, wherein, The valve body (9) is connected with the packing pad (8) outside the position corresponding to the contact surface of the stuffing gland (6).

7. A large torque valve shaft drive as defined in claim 1, wherein, The crank (1) is covered with a non-slip pad outside the position corresponding to the handle.

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