Automatic butterfly valve of liquid methane tank container

Abstract

An automatic butterfly valve for a liquid methane tank container belongs to the technical field of industrial butterfly valve control. The automatic control device comprises an automatic control device and a butterfly valve, the automatic control device comprises a box body and a box cover, a supporting plate is connected into the box body, a servo motor is connected to the side of the supporting plate, the external connecting part of the servo motor extends out of an opening in the lower portion of the box body, and an output shaft of the servo motor is transversely connected with a first bevel gear; a first bevel gear is arranged on the supporting plate, a second bevel gear is longitudinally arranged in cooperation with the first bevel gear, the first bevel gear and the second bevel gear are meshed with each other, a straight gear and an operating rod are arranged above the supporting plate in a sitting mode, the straight gear and the second bevel gear are axially connected and rotate at the same time, and a planetary gear train is arranged on the operating rod in a sitting mode and rotates in cooperation with the straight gear. A valve rod of the butterfly valve extends into the box body and is rotatably connected with the box body through a connecting piece, and the valve rod and the operating rod are connected and rotate at the same time. Manual operation can be omitted, the opening and closing degree of the butterfly valve can be accurately controlled, and the control precision of the butterfly valve in the low-temperature environment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial butterfly valve control, and in particular relates to an automatic butterfly valve for a liquid methane tank container. Background Art

[0002] The butterfly valve is a common fluid control device, which is widely used in industrial and civil pipeline systems due to its simple structure, small size, light weight, and rapid opening and closing. However, the traditional butterfly valve has the following problems when used in the environment of liquid methane tank containers: liquid methane is stored at low temperature in the tank container, and its flow control usually requires manual rotation or only simple electric control. Manual control by staff at low temperatures is dangerous. If the existing electric control device is used, most of them only realize the opening and closing functions of the butterfly valve, and the control accuracy of the butterfly valve is affected by the low temperature environment, and it is difficult to achieve precise flow regulation. Summary of the invention

[0003] The present invention aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides an automatic butterfly valve for a liquid methane tank container; the present invention can save manual operation, and can accurately control the opening and closing size of the butterfly valve, thereby improving the control accuracy of the butterfly valve in a low temperature environment.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] The present invention provides an automatic butterfly valve for a liquid methane tank container, comprising an automatic control device and a butterfly valve, characterized in that the automatic control device comprises a box body and a box cover, a support plate is connected to the box body, a servo motor is connected to the side of the support plate, the external connection part of the servo motor extends from an opening at the bottom of the box body, a first helical gear is horizontally connected to the output shaft of the servo motor, a second helical gear is longitudinally arranged to cooperate with the first helical gear, the first helical gear and the second helical gear are meshed with each other, a spur gear and an operating rod are arranged above the support plate, the spur gear and the second helical gear are axially connected and rotate simultaneously, a planetary gear train is arranged on the operating rod, the planetary gear train rotates in coordination with the spur gear, the valve stem of the butterfly valve extends into the box body and is rotatably connected to the box body through a connecting piece, the valve stem is connected to the operating rod and rotates simultaneously, and the bottom of the valve body of the butterfly valve is connected to a sealing cover through a sealing bolt and a sealing gasket.

[0006] Furthermore, the second bevel gear is connected to the spur gear via bolts, and a shock-proof washer is provided between the second bevel gear and the bolts.

[0007] Furthermore, the planetary gears of the planetary gear system are correspondingly seated on the claws at the upper end of the operating rod, and an intermediate gear is meshed between the sun gear of the planetary gear system and the spur gear. The sun gear, the spur gear and the intermediate gear rotate simultaneously. The planetary gear system drives the planetary gears to rotate simultaneously through the rotation of the sun gear and the cooperation of the gear ring, thereby driving the operating rod to rotate.

[0008] Furthermore, a limit block is arranged above the intermediate gear, the limit block is fixed on the box cover, and the limit block is in contact with the intermediate gear shaft to prevent the intermediate gear from moving.

[0009] Furthermore, the operating rod and the valve stem are fixed to each other through buckles and keys and rotate in coordination.

[0010] Furthermore, a sealing ring and a copper sleeve are provided on the valve stem at the connection with the box body.

[0011] Furthermore, the support plate is connected to the box and the servo motor through support bolts and shock-proof gaskets.

[0012] Furthermore, the box cover is detachably connected to the box body by bolts.

[0013] Beneficial effects of the present invention.

[0014] The present invention can improve fluid control accuracy and equipment reliability, adopts servo motor and planetary gear system transmission to improve transmission accuracy in low temperature environment, and adopts mechanical transmission for switching and flow control, which saves manual operation and avoids danger, and can control flow more accurately than traditional electric control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] Figure 1 It is a side sectional structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal top view of the automatic control device of the present invention.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Markings in the figure: 1 is a butterfly valve, 2 is a box body, 3 is a box cover, 4 is a support plate, 5 is a servo motor, 6 is a first bevel gear, 7 is a second bevel gear, 8 is a spur gear, 9 is an operating lever, 10 is a planetary gear system, 11 is a valve stem, 12 is a connecting piece, 13 is a sealing bolt, 14 is a sealing gasket, 15 is a sealing cover, 16 is a shockproof gasket, 17 is a planetary gear, 18 is a sun gear, 19 is a gear ring, 20 is an intermediate gear, 21 is a limit block, 22 is a buckle, 23 is a key, 24 is a sealing ring, 25 is a copper sleeve, 26 is a support bolt, and 27 is a shockproof gasket. DETAILED DESCRIPTION

[0020] As shown in the accompanying drawings, this embodiment provides an automatic butterfly valve for a liquid methane tank container, including an automatic control device and a butterfly valve 1. The butterfly valve 1 adopts a conventional butterfly valve. When selecting the butterfly plate, the sealing performance of the butterfly plate in cooperation with the tank body and the flexibility of the switch operation should be considered. The valve body is the main part of the butterfly valve 1, which plays the role of connecting the pipeline, accommodating the valve seat, butterfly plate and other components. The butterfly plate is a key component of the butterfly valve 1, and the opening, regulation and closing of the fluid are achieved by rotating the butterfly plate. The valve seat is usually made of rubber, polytetrafluoroethylene and other materials. Its main function is to seal the gap between the butterfly plate and the valve body to prevent leakage of the medium. The valve stem 11 is a component that drives the butterfly plate to rotate, and is controlled by a handle and other devices.

[0021] The automatic control device comprises a box body 2 and a box cover 3. The box cover 3 is detachably connected to the box body 2 by bolts, so as to facilitate the installation and replacement of internal components.

[0022] The box body 2 is connected with a support plate 4 through support bolts 26 and shockproof washers 27, and a servo motor 5 is connected to the side of the support plate 4 through support bolts 26 and shockproof washers 27. The external part of the servo motor 5 extends from the opening below the box body 2 and is electrically connected to the controller and various sensors in the tank container. When the pressure or temperature in the liquid methane tank container exceeds the set value, the signal is transmitted through the relevant sensor to start the servo motor 5. The use of the servo motor 5 can control the size of any flow, can make the flow control linearly change, and the control accuracy is more accurate.

[0023] The output shaft of the servo motor 5 is laterally connected to a first bevel gear 6 , and a second bevel gear 7 is longitudinally arranged to cooperate with the first bevel gear 6 . The first bevel gear 6 and the second bevel gear 7 are meshed with each other, and the servo motor 5 controls the first bevel gear 6 and the second bevel gear 7 to rotate.

[0024] A spur gear 8 and an operating rod 9 are arranged above the support plate 4. The spur gear 8 and the second bevel gear 7 are axially connected by bolts and rotate simultaneously. A shockproof washer 16 is arranged between the second bevel gear 7 and the bolt to prevent the thread of the bolt from being damaged.

[0025] A planetary gear train 10 is disposed on the operating lever 9. The planetary gear train 10 has a conventional structure and includes a central sun gear 18, a plurality of planetary gears 17 on the periphery of the sun gear 18, and a gear ring 19 on the outer ring of the planetary gear 17. The upper end of the operating lever 9 has a claw head that matches the planetary gear 17. The planetary gears 17 of the planetary gear train 10 are correspondingly disposed on the claw heads on the upper end of the operating lever 9. An intermediate gear 20 is meshed between the sun gear 18 and the spur gear 8 of the planetary gear train 10. The intermediate gear 20 is provided because there is a certain distance between the spur gear 8 and the sun gear 18, and the intermediate gear 20 is required for mutual meshing transmission. If the intermediate gear 20 is not used and the spur gear 8 is directly meshed with the sun gear 18, then the spur gear 8 or the planetary gear 17 system needs to be enlarged, and the planetary gear 17 system will have overlapping parts with the spur gear 8, and the two will have an over-fit. Although if the distance between the central axis of the operating lever 9 and the central axis of the spur gear 8 is increased, the corresponding spur gear 8 and the sun gear 18 also need to be increased accordingly, there will still be overlapping parts when fitting together to produce a transition fit, so it is necessary to use an intermediate gear 20 for transmission.

[0026] In order to prevent the intermediate gear 20 from moving, a limit block 21 is provided above the intermediate gear 20. The limit block 21 is fixed on the box cover 3. The limit block 21 contacts the axis of the intermediate gear 20, and prevents the intermediate gear 20 from moving axially but still allows it to rotate.

[0027] After the spur gear 8 and the second bevel gear 7 rotate simultaneously, the sun gear 18, the spur gear 8 and the intermediate gear 20 rotate simultaneously, and the planetary gear system 10 drives the planetary gears 17 to rotate simultaneously through the rotation of the sun gear 18 and the cooperation of the gear ring 19, thereby driving the operating lever 9 to rotate.

[0028] The valve stem 11 of the butterfly valve 1 extends into the housing 2 and is rotatably connected to the housing 2 through a connecting piece 12. A sealing ring 24 and a copper sleeve 25 are provided on the valve stem 11 at the connection with the housing 2 to reduce friction and loss.

[0029] The valve stem 11 and the operating rod 9 are fixedly connected to each other through the buckle 22 and the key 23 and rotate simultaneously. The rotation of the operating rod 9 drives the valve stem 11 to rotate simultaneously. As is well known, the valve stem 11 and the butterfly plate are fixed by the locating pin and rotate in coordination, and the butterfly plate is connected to the valve core through the flange and bolts, which will not be repeated.

[0030] By rotating the handle operating rod 9, the valve stem 11 drives the butterfly plate to rotate, thereby realizing the opening and closing of the fluid; secondly, during the opening process, the valve seat and the butterfly plate fit tightly to form a sealing pair to prevent medium leakage; thirdly, by adjusting the opening angle of the butterfly plate, the flow rate can be adjusted; finally, in the closed state, the butterfly valve 1 has a good flow-cutting performance to ensure the safe and stable operation of the pipeline system.

[0031] The opening and closing angles of the valve core are precisely controlled by an automatic control device. When the value measured by the sensor is within a given range, the servo motor 5 will start to reverse until the valve core closes and stops.

[0032] In order to prevent leakage of liquid methane in a closed state, a sealing cover 15 is connected to the bottom of the valve body of the butterfly valve 1 through a sealing bolt 13 and a sealing gasket 14, which further improves the sealing performance of the butterfly valve 1 in a low-temperature environment of liquid methane.

[0033] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. An automatic butterfly valve for a liquid methane tank container, comprising an automatic control device and a butterfly valve (1), characterized in that: The automatic control device comprises a box body (2) and a box cover (3); a support plate (4) is connected inside the box body (2); a servo motor (5) is connected to the side of the support plate (4); an externally connected portion of the servo motor (5) extends from an opening at the bottom of the box body (2); an output shaft of the servo motor (5) is transversely connected to a first bevel gear (6); a second bevel gear (7) is longitudinally arranged to cooperate with the first bevel gear (6); the first bevel gear (6) and the second bevel gear (7) are meshed with each other; a spur gear (8) and an operating rod (9) are arranged above the support plate (4). 9), the spur gear (8) and the second bevel gear (7) are axially connected and rotate simultaneously, a planetary gear train (10) is seated on the operating rod (9), and the planetary gear train (10) rotates in coordination with the spur gear (8), the valve stem (11) of the butterfly valve (1) extends into the housing (2) and is rotatably connected to the housing (2) via a connecting piece (12), the valve stem (11) is connected to the operating rod (9) and rotates simultaneously, and the bottom of the valve body of the butterfly valve (1) is connected to a sealing cover (15) via a sealing bolt (13) and a sealing gasket (14).

2. The automatic butterfly valve for liquid methane tank container according to claim 1 is characterized in that: The second bevel gear (7) is connected to the spur gear (8) via bolts, and a shock-proof washer (16) is provided between the second bevel gear (7) and the bolts.

3. The automatic butterfly valve for liquid methane tank container according to claim 1, characterized in that: The planetary gears (17) of the planetary gear train (10) are correspondingly seated on the claws at the upper end of the operating rod (9); an intermediate gear (20) is meshed between the sun gear (18) of the planetary gear train (10) and the spur gear (8); the sun gear (18), the spur gear (8) and the intermediate gear (20) rotate simultaneously; the planetary gear train (10) drives the planetary gears (17) to rotate simultaneously through the rotation of the sun gear (18) and the cooperation of the gear ring (19), thereby driving the operating rod (9) to rotate.

4. The automatic butterfly valve for liquid methane tank container according to claim 3 is characterized in that: A limit block (21) is arranged above the intermediate gear (20), the limit block (21) is fixed on the box cover (3), and the limit block (21) is in contact with the shaft of the intermediate gear (20) to prevent the intermediate gear (20) from moving.

5. The automatic butterfly valve for liquid methane tank container according to claim 1, characterized in that: The operating rod (9) and the valve stem (11) are fixed to each other via a buckle (22) and a key (23) and rotate in coordination with each other.

6. The automatic butterfly valve for liquid methane tank container according to claim 1, characterized in that: A sealing ring (24) and a copper sleeve (25) are provided on the valve stem (11) at the connection with the box body (2).

7. The automatic butterfly valve for liquid methane tank container according to claim 1, characterized in that: The support plate (4) is connected to the box body (2) and the servo motor (5) via support bolts (26) and shock-proof gaskets (27).

8. The automatic butterfly valve for liquid methane tank container according to claim 1, characterized in that: The box cover (3) is detachably connected to the box body (2) via bolts.

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