阅读说明：本技术 一种角行程低温阀门电动执行机构 (Electric actuating mechanism of angular travel low-temperature valve ) 是由 黄臶 于 2018-08-28 设计创作，主要内容包括：本发明提供了一种角行程低温阀门电动执行机构,包括壳体,其能套于阀门填料函外,且向下延伸；手柄,其设于壳体下部,且壳体内设有一手动锥齿轮与手柄连接；传动单元,其包括设置于壳体顶部的连轴杆,连轴杆向侧方延伸出连轴杆锥齿轮,一传动杆与壳体高度方向平行,传动杆顶部设有与连轴杆锥齿轮相啮合的传动杆上锥齿轮,传动杆底部设有传动杆下锥齿轮,传动杆下锥齿轮能与手动锥齿轮啮合。用壳体套住阀门填料函,将手动控制阀门的手柄高度下调至于管道相近的地方,方便在断电时对阀门进行启闭；并且管道在发生微量泄露时,启闭手柄与管道较近,方便维修人员在维修管道过程中对阀门进行控制。(The invention provides an electric actuating mechanism of an angular travel low-temperature valve, which comprises a shell, a valve stuffing box and a valve core, wherein the shell can be sleeved outside the valve stuffing box and extends downwards; the handle is arranged at the lower part of the shell, and a manual bevel gear is arranged in the shell and connected with the handle; the transmission unit comprises a connecting shaft rod arranged at the top of the shell, a connecting shaft rod bevel gear extends to the lateral side of the connecting shaft rod, a transmission rod is parallel to the height direction of the shell, a transmission rod upper bevel gear meshed with the connecting shaft rod bevel gear is arranged at the top of the transmission rod, a transmission rod lower bevel gear is arranged at the bottom of the transmission rod, and the transmission rod lower bevel gear can be meshed with a manual bevel gear. The valve stuffing box is sleeved by the shell, the handle of the manual control valve is adjusted to be close to the pipeline under the height, and the valve is convenient to open and close when power is off; and when the pipeline is revealed in trace, the opening and closing handle is close to the pipeline, so that maintenance personnel can control the valve conveniently in the pipeline maintenance process.)

1. The utility model provides an angle stroke cryogenic valve electric actuator which characterized in that: comprises that

The shell (1) can be sleeved outside the valve stuffing box and extends downwards;

the handle (3) is arranged at the lower part of the shell (1), and a manual bevel gear (23) is arranged in the shell (1) and connected with the handle (3);

the transmission unit comprises a connecting shaft rod arranged at the top of the shell (1), a connecting shaft rod bevel gear (211) extends out of the side of the connecting shaft rod, a transmission rod (22) is parallel to the height direction of the shell (1), a transmission rod upper bevel gear (221) meshed with the connecting shaft rod bevel gear (211) is arranged at the top of the transmission rod (22), a transmission rod lower bevel gear (222) is arranged at the bottom of the transmission rod (22), and the transmission rod lower bevel gear (221) can be meshed with the manual bevel gear (23).

2. The electric actuator of an angular travel cryogenic valve of claim 1, wherein: the manual bevel gear (23) can be close to or far away from the lower bevel gear (222) of the transmission rod, the manual bevel gear (23) is connected with the end part of the handle (3) through a telescopic rod (33) penetrating through the shell (1), the outer end of the telescopic rod (33) is hinged with the handle (3), and the inner end of the telescopic rod (33) is fixed with the manual bevel gear (23).

3. An angular travel cryogenic valve electric actuator according to claim 2, wherein: handle (3) and the articulated one end of telescopic link (33) are equipped with cam (31), and cam (31) are passed along cam (31) axial to articulated shaft (32), make handle (3) and telescopic link (33) articulated each other, just articulated shaft (32) divide into thin wall side (311) and thick wall side (312) with cam (31), and thick wall side (312) can tightly support on casing (1) outer wall.

4. An angular travel cryogenic valve electric actuator according to claim 2, wherein: the telescopic rod (33) is sleeved with a spring (34), one end of the spring (34) is abutted to the inner wall of the shell (1), and the other end of the spring is abutted to the manual bevel gear (23).

5. The electric actuator of an angular travel cryogenic valve of claim 1, wherein: casing (1) is equipped with first arc wall (13) and second arc wall (14) in handle (3) week side, be equipped with handle stopper (15) between two arc walls (13, 14).

6. The electric actuator of an angular travel cryogenic valve of claim, wherein: the connecting shaft lever bevel gear (211) is 1/4 circular, a gear limiting block (17) is arranged at the rotating limit position of the connecting shaft lever bevel gear, and the gear limiting block (17) is arranged on the inner wall of the shell (1).

7. An angular travel cryogenic valve electric actuator according to claim 5, wherein: the radian of the two arc-shaped grooves is equal.

8. The electric actuator of an angular travel cryogenic valve of claim 1, wherein: a transmission rod cavity (12) is formed in the height direction of the shell (1), and the transmission rod (22) is arranged in the transmission rod cavity (12).

9. An angular travel cryogenic valve electric actuator according to claim 3, wherein: still the cover has a cushion (35) on telescopic link (33), cushion (35) are located between handle (3) and casing (1) outer wall.

10. The electric actuator of an angular travel cryogenic valve of claim 1, wherein: the top of the shell (1) is provided with an installation window (11), and the installation window (11) is arranged on the periphery of the connecting shaft rod.

Technical Field

The invention belongs to the field of electric actuators, and particularly relates to an electric actuating mechanism of an angular travel low-temperature valve.

Background

Along with social development, the requirement on environmental protection technology is higher and higher, products such as LNG (liquefied natural gas) and the like needing low-temperature storage and transportation are developed more and more rapidly, the existing low-temperature valve is higher in stuffing box design and inconvenient to manually adjust in order to ensure the sealing property and the protection of sealing materials, and the overall height of the valve is increased after the existing electric actuator is used; in order to prevent accidents such as power failure, the electric actuator is generally provided with a handle for manual opening and closing, but under the condition of higher height, a user cannot conveniently control the valve by using the handle, and most products stored and transported at low temperature have the characteristics of flammability, explosiveness, toxicity and the like, so that danger is easily caused under some power failure conditions.

Disclosure of Invention

In view of the above, the present invention is directed to an electric actuator for an angular-stroke cryogenic valve.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an electric actuator of an angular travel low-temperature valve comprises

The shell can be sleeved outside the valve stuffing box and extends downwards;

the handle is arranged at the lower part of the shell, and a manual bevel gear is arranged in the shell and connected with the handle;

and the transmission unit comprises a connecting shaft rod arranged at the top of the shell, a connecting shaft rod bevel gear extends out of the connecting shaft rod to the lateral side, a transmission rod is parallel to the height direction of the shell, an upper bevel gear of the transmission rod meshed with the connecting shaft rod bevel gear is arranged at the top of the transmission rod, a lower bevel gear of the transmission rod is arranged at the bottom of the transmission rod, and the lower bevel gear of the transmission rod can be meshed with the manual bevel gear. The manual control valve is used for sleeving a valve stuffing box, and the handle of the manual control valve is lowered to a place close to a pipeline, so that the valve is convenient to open and close when power is off; and when the pipeline is revealed in trace, the opening and closing handle is close to the pipeline, so that maintenance personnel can control the valve conveniently in the pipeline maintenance process.

Furthermore, the manual bevel gear can be close to or far away from the bevel gear below the transmission rod, the manual bevel gear is connected with the end part of the handle through a telescopic rod penetrating through the shell, the outer end of the telescopic rod is hinged with the handle, and the inner end of the telescopic rod is fixed with the manual bevel gear.

Furthermore, the handle is equipped with the cam with the articulated one end of telescopic link, and an articulated shaft passes the cam along the cam axial, makes handle and telescopic link articulated each other, just the articulated shaft divide into thin wall side and thick wall side with the cam, and the thick wall side can tightly support on the casing outer wall. The handle is used for tightly pushing or loosening the shell, so that the telescopic rod can move along the axial direction, and the manual conical teeth and the transmission lower conical teeth can be controlled to be clutched.

Furthermore, the telescopic rod is sleeved with a spring, one end of the spring is abutted to the inner wall of the shell, and the other end of the spring is abutted to the manual bevel gear. The manual bevel gear and the transmission rod lower bevel gear are controlled.

Furthermore, the shell is provided with a first arc-shaped groove and a second arc-shaped groove on the periphery of the handle, and a handle limiting block is arranged between the two arc-shaped grooves (the first arc-shaped groove and the second arc-shaped groove). One of the arc-shaped grooves is used for pulling the handle in a manual state, and the other arc-shaped groove is used for lifting the handle after the handle is pulled, so that the actuating mechanism is adjusted to be in an electric mode.

Furthermore, the connecting shaft rod bevel gear is 1/4 circular, a gear limiting block is arranged at the rotating limit position of the connecting shaft rod bevel gear, and the gear limiting block is arranged on the inner wall of the shell.

Further, the radian of the two arc-shaped grooves is equal.

Furthermore, a transmission rod cavity is formed in the height direction of the shell, and the transmission rod is arranged in the transmission rod cavity. Used for limiting the transmission rod.

Furthermore, a rubber mat is sleeved on the telescopic rod and arranged between the handle and the outer wall of the shell. For preventing the handle from coming into direct contact with the housing.

Furthermore, the top of the shell is provided with an installation window which is arranged on the periphery of the connecting shaft rod. The connecting device is used for connecting and maintaining the connecting shaft rod and the valve rod.

Compared with the prior art, the electric actuating mechanism of the angular travel low-temperature valve has the following advantages:

the manual control handle of the electric actuator is arranged near the pipeline in a gear transmission mode, so that a worker can conveniently maintain the pipeline, or manually control the opening and closing of the pipeline in the case of power failure;

the manual bevel gear which can be clutched with the transmission unit is adopted, so that the manual actuator can not influence the position of the handle in the electric mode.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a general schematic view of the present electric actuator;

FIG. 2 is a cross-sectional view of the electric actuator;

FIG. 3 is a schematic view of the engagement of the manual gear with the lower gear of the transmission rod;

FIG. 4 is a schematic view of the engagement state of the manual gear and the lower gear of the transmission rod;

FIG. 5 is a three-dimensional schematic view of the handle structure;

fig. 6 is a schematic diagram of the relationship between the bevel gear of the connecting shaft lever and the limiting block.

Description of reference numerals:

1-a shell; 11-mounting a window; 12-a drive rod cavity; 13-a first arc-shaped slot; 14-a second arc-shaped slot; 15-handle limiting block; 16-a gap; 17-a gear stop block; 21-connecting the shaft rod; 211-connecting shaft bevel gear; 22-a transmission rod; 221-bevel gear on transmission rod; 222-drive rod lower bevel gear; 23-manual bevel gear; 3-a handle; 31-a cam; 311-thin wall side; 312-thick wall side; 313-an intermediate tank; 32-articulated shaft; 33-a telescopic rod; 34-a spring; 35-a rubber pad; 4-motor.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

An electric actuating mechanism of an angular travel low-temperature valve comprises a cylindrical shell 1 which can be sleeved outside a stuffing box of the low-temperature valve, wherein a connecting shaft rod which can enable a valve rod of the angular travel low-temperature valve to rotate is arranged at the top of the shell 1, a connecting shaft rod 21 bevel gear is arranged below the connecting shaft rod, the section of the connecting shaft rod bevel gear is in a fan shape, the fan-shaped connecting shaft rod gear rotates horizontally, the rotating limit position can meet the limit position of a valve switch, limit blocks are arranged at the limit positions of the connecting shaft rod bevel gear, the limit blocks are fixedly arranged on the shell 1, a motor 4 which can drive the connecting shaft rod to rotate is arranged above the connecting shaft rod 21 bevel gear, and the motor 4 is controlled by a;

a transmission rod 22 is arranged along the height direction of the cylindrical shell 1, an upper bevel gear of the transmission rod 22 meshed with a bevel gear of the connecting shaft rod 21 is arranged at the upper end of the transmission rod 22, and a lower bevel gear of the transmission rod 22 is arranged at the lower end of the transmission rod 22;

the lower end of the shell 1 is provided with a manual bevel gear which can be close to or far away from the lower end of the transmission rod 22, when the manual bevel gear is close to the lower bevel gear of the transmission rod 22, the two bevel gears are meshed, the manual bevel gear is fixedly connected with a telescopic rod 33, the telescopic rod 33 extends outwards to form the shell 1, the outer end of the telescopic rod 33 is hinged with a handle 3, a spring 34 is arranged between the manual bevel gear and the shell 1, the spring 34 is sleeved on the telescopic rod 33, one end of the spring 34 is abutted to the inner wall of the shell 1, and the other end of.

The handle 3 is hinged to the end of the telescopic rod 33 through a hinge shaft 32, one end of the handle 3 hinged to the telescopic rod 33 is in a cam 31 structure capable of being pressed against or loosened from the shell 1, the cam 31 is axially provided with a middle groove 313, the telescopic rod 33 penetrates through the middle groove 313 of the cam 31, the hinge rod penetrates through the cam 31 and divides the side wall of the cam 31 into a thin-wall side 311 and a thick-wall side 312, when the thick-wall side 312 is close to the shell 1, the handle 3 pulls out the telescopic rod 33, and the motor 4 controls the valve; when the thin-walled side 311 is close to the housing 1, the spring 34 can push the manual bevel gear close to the lower bevel gear of the transmission lever 22 and engage both gears with each other to facilitate manual control of the valve.

The tooth profiles of the lower bevel gear of the transmission rod 22 and the manual bevel gear are cycloid tooth profiles.

A rubber pad 35 is arranged between the shell 1 and the handle 3.

The top end of the side wall of the shell 1 is provided with a mounting window 11 for connecting the connecting rod 21 with the valve rod, and the mounting window 11 is opposite to the connecting cavity.

The casing 1 is provided with a first arc-shaped groove and a second arc-shaped groove which are used for accommodating the handle 3, the first arc-shaped groove and the second arc-shaped groove are oppositely arranged, two limiting bosses which are used for limiting the rotation angle of the handle 3 are arranged between the two arc-shaped grooves, the two arc-shaped grooves and the two limiting bosses are encircled into a circle, the first arc-shaped groove is arranged above the second arc-shaped groove, the telescopic rod 33 penetrates out of the casing 1 from the center of the circle, and when the motor 4 automatically controls the valve, the handle 3 is arranged in the first arc-shaped groove; when the valve needs to be manually controlled, the handle 3 is pulled downwards along the hinge shaft 32 to the second arc-shaped groove, and then the valve is adjusted to be opened and closed according to the requirement.

When the electric actuating mechanism of the angular travel low-temperature valve works, under normal conditions, the handle 3 is lifted into the first arc-shaped groove, the thick-wall side 312 jacks the handle 3 outwards to drive the manual bevel gear 23 to be away from the bevel gear under the transmission rod 22, the meshing state is cancelled, and the control system of the electric actuating mechanism controls the motor 4 to rotate to drive the valve rod of the valve to rotate, so that the aim of opening and closing the pipeline is fulfilled; when the manual control valve is needed to be opened and closed, the handle 3 is pulled to the second arc-shaped groove along the hinged position of the handle 3 and the telescopic rod 33, the handle 3 is twisted as required to open and close the valve, and then the handle 3 is pulled upwards to the first arc-shaped groove, so that the electric actuating mechanism is recovered to the electric mode. When the pipeline is exposed and other working conditions occur, the handle 3 arranged near the pipeline is convenient for maintenance personnel to control the opening and closing of the valve when the pipeline is checked.

The lower part of the shell 1 is provided with a notch 16 for clamping a valve pipeline.

The transmission ratio of the bevel gear on the transmission rod 22 to the bevel gear of the connecting shaft rod is 1: 1; the transmission ratio of the bevel gear below the transmission rod 22 to the manual bevel gear 23 is 1: 1.

According to the relative national standard requirements of the low-temperature valve, the low-temperature valve also needs to prevent working conditions such as water drops on the valve due to temperature change, but the existing low-temperature valve is difficult to completely avoid the working conditions.

The invention relates to an electric actuating mechanism of an angular travel low-temperature valve, which mainly protects the internal transmission structure and the structure of a shell 1, and actually a displacement sensor is arranged at a telescopic rod 33, when a manual bevel gear 23 is meshed with a bevel gear below a transmission rod 22, the displacement sensor controls a motor 4 to automatically power off, so that the danger caused by the system power-on in the process of manually adjusting the valve is prevented; as shown in fig. 1, the system control unit is arranged in a control box at the side of the housing 1, and the specific arrangement mode is the same as the prior art;

the electric actuating mechanism of the angular travel low-temperature valve further comprises a locking mechanism and the like, the structure and the connection mode of the electric actuating mechanism can be met in the prior art, and the details are not repeated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.