CN219300052U

CN219300052U - Double-bearing anti-rotation top-loading hand wheel device

Info

Publication number: CN219300052U
Application number: CN202320026534.6U
Authority: CN
Inventors: 王利华; 李建林; 陈红方; 武显强
Original assignee: Dongchen Intelligent Technology Co ltd
Current assignee: Dongchen Intelligent Technology Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-07-04
Anticipated expiration: 2033-01-06

Abstract

The utility model relates to a double-bearing anti-rotation top-loading hand wheel device. In the top type hand wheel device of the traditional pneumatic actuating mechanism, the single bearing mechanism has high contact stress and poor shock resistance, and under the working condition of high load, the single bearing mechanism can not bear bidirectional axial load while bearing radial load. The utility model comprises an upper film cover, wherein a hand wheel seat is arranged on the upper film cover, and is characterized in that two groups of plane bearings are arranged at the upper end of the hand wheel seat, a nut is arranged at the center of the plane bearings, the upper part of the nut is connected with a hand wheel and can synchronously rotate along with the hand wheel, the lower part of the nut is connected with a screw rod, and an anti-rotation screw is arranged between the nut and the screw rod. The utility model can fundamentally avoid the bearing from bearing high contact stress and bearing radial load and bearing bidirectional axial load, and ensure the safe, stable and efficient operation of equipment.

Description

Double-bearing anti-rotation top-loading hand wheel device

Technical Field

The utility model relates to the technical field of pneumatic actuators, in particular to a double-bearing anti-rotation top-loading hand wheel device.

Background

For industries such as electric power, petroleum, chemical industry, metallurgy and the like, dangerous working conditions such as combustible gas and combustible liquid can be conveyed. When the air source is lost and an emergency occurs, the air-closure type single-action pneumatic actuator can be automatically reset, so that the danger is reduced to the minimum.

According to the process requirements of different positions, when the gas interruption, the power interruption and the signal interruption faults occur, the valve sometimes needs to be closed. Because of the hazards, valve closure is typically accomplished by a hand wheel mechanism, which is required to ensure proper operation of the valve.

The top type hand wheel device of the traditional pneumatic actuating mechanism uses a single bearing mechanism, and in a general case, the single bearing mechanism is difficult to ensure the dustproof performance, the service life and the ageing resistance of the pneumatic actuating mechanism, and the abrasion of a connecting sleeve is reduced.

In the top type hand wheel device of the traditional pneumatic actuating mechanism, the single bearing mechanism has high contact stress and poor shock resistance, and under the working condition of high load, the single bearing mechanism can not bear bidirectional axial load while bearing radial load.

In addition, when the single bearing mechanism operates, the hand wheel is used as a limiting piece and is directly contacted with the hand wheel seat, and then abrasion exists between the hand wheel and the nut. The hand wheel is regarded as the rotating member, belongs to clearance fit between hand wheel seat, under the operating mode of high load, carries out switching operation repeatedly, can lead to pneumatic actuating mechanism's leakproofness loss, and its reason lies in:

1. the single bearing mechanism cannot withstand radial loads while simultaneously being capable of withstanding bi-directional axial loads, thereby resulting in a failure of the valve to open or close in a preset position.

2. The single bearing mechanism is repeatedly opened and closed, and has high contact stress and weak impact resistance.

3. The single bearing mechanism has a service life under the operation of high load and frequent opening and closing.

Disclosure of Invention

Aiming at the problems, the utility model provides the double-bearing anti-rotation top-loading hand wheel device which can fundamentally avoid high contact stress and radial load of the bearing, and simultaneously can bear bidirectional axial load, thereby ensuring safe, stable and efficient operation of equipment.

The utility model adopts the following technical scheme: the double-bearing anti-rotation top-loading hand wheel device comprises an upper film cover, wherein a hand wheel seat is arranged on the upper film cover, and the double-bearing anti-rotation top-loading hand wheel device is characterized in that two groups of plane bearings are arranged at the upper end of the hand wheel seat, a nut is arranged at the center of each plane bearing, a hand wheel connected with the upper part of the nut can synchronously rotate along with the hand wheel, a screw rod is connected with the lower part of the nut, and an anti-rotation screw is arranged between the nut and the screw rod.

Preferably, the anti-rotation screw is arranged on the hand wheel seat by an external thread structure, and the bottom of the anti-rotation screw is placed in the groove of the screw rod.

Preferably, the screw rod is connected with the nut through trapezoidal threads.

Preferably, the two groups of plane bearings are respectively arranged on the upper end face and the lower end face of the inner hole step of the hand wheel seat.

Preferably, a sealing groove is formed in the center of the inner hole step of the hand wheel seat, and an O-shaped ring is arranged in the sealing groove.

Preferably, the nut and the hand wheel are fixed through a flat key, and a compression nut is arranged above the nut.

Preferably, the upper membrane cover is connected with the exhaust cap through threads.

Preferably, the device further comprises a coupling sleeve which is connected to the upper membrane cover in a threaded mode, and the step surface of the screw rod is arranged in the middle of the coupling sleeve.

The beneficial effects of the utility model are as follows:

(1) The double-bearing structure is adopted, so that uneven contact stress of the single-bearing device under a high-load working condition is effectively eliminated, and the double-bearing device can bear a bidirectional axial load while bearing a radial load.

(2) The double bearings are used as the limiting elements, and the hand wheel is directly contacted with the upper surface of the bearings, so that abrasion between the hand wheel and the hand wheel seat is avoided, and the hand wheel is smoother during rotary motion.

(3) The double bearing structure cooperates with the O-shaped ring to form a sealing structure, so that impurities in the air are effectively prevented from entering the air chamber of the pneumatic actuating mechanism, and the whole device is good in dust resistance.

(4) And an anti-rotation screw is arranged in the screw rod groove, so that the screw rod is ensured to normally move in the operation of the device.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present utility model.

Fig. 2 is a schematic diagram of the a portion structure of fig. 1.

Fig. 3 is a schematic diagram of the B section structure of fig. 1.

In the figure: 1. the device comprises an upper film cover 2, an exhaust cap 3, a hand wheel seat 4, a bearing 5, a key 6, a compression nut 7, a hand wheel 8, a nut 9, an O-shaped ring 10, an anti-rotation screw 11, a screw rod 12 and a coupling sleeve.

Detailed Description

The utility model will be further illustrated with reference to specific examples.

The double-bearing anti-rotation top-loading hand wheel device shown in fig. 1-3 comprises an upper membrane cover 1, an exhaust cap 2, a hand wheel seat 3, a bearing 4, a key 5, a compression nut 6, a hand wheel 7, a screw 8, an O-shaped ring 9, an anti-rotation screw 10, a screw rod 11 and a coupling sleeve 12.

The upper film cover 1 is provided with a hand wheel seat 3, two groups of plane bearings 4 are arranged at the upper end of the hand wheel seat 3, a nut 8 is arranged at the center of the plane bearings 4, the upper part of the nut 8 is connected with a hand wheel 7 and can synchronously rotate along with the hand wheel, the lower part of the nut 8 is connected with a screw rod 11, and an anti-rotation screw 10 is arranged between the nut 8 and the screw rod 11. In the embodiment, the upper end of the hand wheel seat is provided with the double-bearing structure, so that the contact stress of the hand wheel can be counteracted, and the abrasion of the lower end of the hand wheel is reduced. Ensuring that the screw rod is concentric with the screw nut in the movement process.

Specifically, the screw rod 11 is connected with the screw nut 8 through trapezoidal threads. The nut 8 and the hand wheel 7 are fixed through the flat key 5, and threads are arranged at the upper end of the nut, so that the pressing nut 6 is screwed to limit the hand wheel and the nut.

In one embodiment, the anti-rotation screw 10 is arranged on the hand wheel seat 3 in an external thread structure, and the bottom of the anti-rotation screw 10 is placed into the groove of the screw rod 11. The anti-rotation screw is arranged on the side face of the hand wheel seat and is in threaded connection with the side face of the hand wheel seat, and the anti-rotation screw is inserted into the groove of the screw rod, so that the screw rod can be prevented from rotating when moving up and down.

In one embodiment, two sets of planar bearings 4 are respectively arranged on the upper end face and the lower end face of the inner hole step of the hand wheel seat 3. The two sets of planar bearings are separated by an inner bore step.

Specifically, the inner hole step of the hand wheel seat forms a sealing groove at the center, and an O-shaped ring 9 is arranged in the sealing groove. The O-shaped ring at the joint center of the biplane bearing forms a dustproof structure, so that impurities in the air are prevented from entering the air chamber of the pneumatic actuator.

In one embodiment, the upper membrane cover 1 is connected with the exhaust cap 2 through threads.

Specifically, the device also comprises a coupling sleeve 12 which is connected to the upper membrane cover 1 in a threaded manner, and the step surface of the screw rod 11 is arranged in the middle of the coupling sleeve 12.

The working process and the working principle of the utility model are as follows:

as shown in fig. 2, in the air-loss state of the actuator, the hand wheel 7 and the connected nut 8 need to be rotated, and the nut 8 is connected with the screw rod 11 in a threaded manner, so that the opening and closing work of the valve is realized. The double bearing 4 structure at the bottom of the nut 8 counteracts the stress of the device, thus making the rotation smooth.

As shown in the figure 3 of the drawings,

once the air source fails, the main hand wheel is manually rotated, the hand wheel 7 drives the screw nut 8 to rotate, so that the screw rod 11 in the air source is pushed to move up and down, and the limit step at the lower end of the screw rod 11 drives the connecting sleeve to move up and down, so that the push rod moves up and down. Until the anti-rotation screw 10 abuts against the upper end groove in the screw rod 11.

The utility model has smart structure and reasonable design, is suitable for severe working conditions of frequent actions and high load, can fundamentally avoid the bearing from bearing high contact stress and bearing radial load, and can bear bidirectional axial load at the same time, thereby ensuring the safe, stable and efficient operation of the equipment.

It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. The utility model provides a duplex bearing prevents changeing top mounted hand wheel device, includes membrane lid (1), sets up hand wheel seat (3) on going up membrane lid (1), its characterized in that hand wheel seat (3) upper end install two sets of plane bearing (4), the center installation screw (8) of plane bearing (4), hand wheel (7) can be done synchronous gyration motion along with it in connection with the upper portion of screw (8), screw (11) are connected to the lower part of screw (8), install between screw (8) and screw (11) and prevent changeing screw (10).

2. The double-bearing anti-rotation top-loading hand wheel device according to claim 1, characterized in that the anti-rotation screw (10) is arranged on the hand wheel seat (3) by an external thread structure, and the bottom of the anti-rotation screw (10) is placed into a groove of the screw rod (11).

3. The double-bearing anti-rotation top-loading hand wheel device according to claim 1, characterized in that the screw rod (11) is connected with the screw nut (8) through trapezoidal threads.

4. The double-bearing anti-rotation top-loading hand wheel device is characterized in that two groups of plane bearings (4) are respectively arranged on the upper end face and the lower end face of an inner hole step of a hand wheel seat (3).

5. The double-bearing anti-rotation top-loading hand wheel device is characterized in that a sealing groove is formed in the center of an inner hole step of the hand wheel seat, and an O-shaped ring (9) is arranged in the sealing groove.

6. The double-bearing anti-rotation top-loading hand wheel device according to claim 1, wherein the nut (8) and the hand wheel (7) are fixed through a flat key (5), and a compression nut (6) is arranged above the hand wheel (7).

7. The double-bearing anti-rotation top-loading hand wheel device is characterized in that the upper membrane cover (1) is connected with the exhaust cap (2) through threads.

8. The double-bearing anti-rotation top-loading hand wheel device according to claim 1, further comprising a coupling sleeve (12) in threaded connection with the upper membrane cover (1), wherein the step surface of the screw rod (11) is arranged in the middle of the coupling sleeve (12).