Ultralow-temperature double-eccentric elastic sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses an ultralow-temperature double-eccentric elastic sealing butterfly valve which comprises a valve body, a valve plate is arranged in the valve body, a valve rod is arranged on the rear side of the valve plate and located at the eccentric position of the valve plate, a cavity is formed in the valve body, and the valve plate is arranged in the cavity. The upper end of the valve rod rotatably penetrates into the cavity, a driving rod is rotatably connected to the interior of the cavity, the upper end of the driving rod rotatably penetrates out of the interior of the valve body, and through cooperation of a movable disc, a fixed disc, a butt joint rod, a butt joint groove and other structures, the situation that a valve plate is driven to rotate when the driving rod is touched unconsciously is effectively avoided; and meanwhile, by means of cooperation of a fixing ring, a lifting handle and other structures, unlocking can only be achieved through active force application, the safety and stability of the valve body are further improved, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field, concretely is a kind of super low temperature double eccentric elastic sealing butterfly valve. BACKGROUND

[0002] With the development of aerospace, shipping and many other industries, the importance of butterfly valves used in extreme complex conditions (super low temperature, super high temperature, high pressure, multiphase flow, etc.) gradually highlights. For example, liquefied natural gas (LNG) is a special ship designed and built for transporting liquefied natural gas at -163℃ super low temperature, and super low temperature butterfly valves are used very frequently.

[0003] In the prior art, the publication number CN219119813U discloses a super low temperature double eccentric elastic sealing butterfly valve, but the above prior art has the problem that when the personnel mobility is large and the valve rod does not have a protection function, the valve rod is easily rotated after the work personnel rotates the valve plate to the appropriate angle through the valve rod, which easily causes the butterfly valve to be mistakenly opened or closed due to collision of the valve rod, and the safety is poor. In view of this, we propose a super low temperature double eccentric elastic sealing butterfly valve to solve the above problems. UTILITY MODEL CONTENTS

[0004] In view of the shortcomings of the prior art, the utility model provides a super low temperature double eccentric elastic sealing butterfly valve to solve the problem of poor safety of some existing super low temperature double eccentric elastic sealing butterfly valves.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a super low temperature double eccentric elastic sealing butterfly valve, comprising a valve body, a valve plate is arranged inside the valve body, a valve rod is arranged at the rear side of the valve plate, the valve rod is located at the eccentric position of the valve plate, a cavity is formed in the inside of the valve body, the upper end of the valve rod penetrates into the inside of the cavity in a rotating manner, a drive rod is rotatably connected to the inside of the cavity, the upper end of the drive rod penetrates out of the inside of the valve body in a rotating manner, an activity disc is movably sleeved on the outside of the valve rod, a fixed disc is fixedly connected to the upper end of the valve rod, a butt joint rod is fixedly connected to the lower surface of the fixed disc, a butt joint groove is formed in the upper surface of the activity disc, the butt joint groove and the butt joint rod are matched, and a drive assembly is arranged on the surface of the activity disc.

[0006] Preferably, the drive assembly comprises two round rods, both of which are fixedly connected to the upper surface of the activity disc, two arc-shaped grooves are formed in the upper surface of the valve body, and both of the arc-shaped grooves are in communication with the cavity.

[0007] Preferably, the two round rods are respectively slidably connected in the inside of the two arc-shaped grooves, and the upper end of the round rod extends out of the inside of the cavity.

[0008] Preferably, the upper end of the two round rods is fixedly connected with a fixing ring, and the outer part of the fixing ring is fixedly connected with a lifting handle.

[0009] Preferably, the outer part of the driving rod is movably sleeved with a first connecting ring, the first connecting ring is movably sleeved on the outer part of the round rod, the inner part of the first connecting ring is provided with a groove, and the surface of the round rod is fixedly connected with a fixing block.

[0010] Preferably, the outer part of the driving rod is rotatably sleeved with a second connecting ring, the second connecting ring and the first connecting ring are fixedly connected with a spring, and the spring is movably sleeved on the outer part of the driving rod.

[0011] Preferably, the outer part of the driving rod is fixedly connected with a rotating handle.

[0012] Preferably, the inner part of the cavity is fixedly connected with a motor, the output shaft of the motor is fixedly connected with a first gear, the outer part of the first gear is meshedly connected with a second gear, and the second gear is fixedly sleeved on the outer part of the valve rod.

[0013] Compared with the prior art, the utility model provides a kind of super low temperature double eccentric elastic sealing butterfly valve, with following beneficial effects:

[0014] 1、the super low temperature double eccentric elastic sealing butterfly valve, by the cooperation of movable disc, fixed disc, butt joint rod, butt joint groove and other structures, effectively avoid the situation that drive rod is driven to rotate when being touched unintentionally, simultaneously with the cooperation of fixed ring, lifting handle and other structures, it is unlocked by active force, further improve the safety and stability of valve body itself, and practicality is higher.

[0015] 2、the super low temperature double eccentric elastic sealing butterfly valve, by the cooperation of first connecting pipe and spring, the shielding and sealing of arc-shaped groove are realized. SHEET DESCRIPTION

[0016] Figure 1 it is the structure schematic view of a kind of super low temperature double eccentric elastic sealing butterfly valve of the utility model;

[0017] Figure 2 it is the first schematic view of the section structure of valve body of the utility model;

[0018] Figure 3 it is the second schematic view of the section structure of valve body of the utility model;

[0019] Figure 4 it is Figure 3 the enlarged view of A in figure;

[0020] Figure 5 it is Figure 2 the enlarged view of B in figure;

[0021] Figure 6 It is the cross section structure schematic view of the first connecting ring of the utility model.

[0022] In the drawing: 1, valve body; 2, valve plate; 3, valve stem; 4, cavity; 5, drive rod; 6, arc slot; 7, round rod; 8, movable disc; 9, fixed disc; 10, butt joint rod; 11, butt joint groove; 12, fixed ring; 13, second connecting ring; 14, first connecting ring; 15, spring; 16, motor; 17, first gear; 18, second gear; 19, recess; 20, fixed block; 21, rotating handle; 22, lifting handle. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range protected by the utility model.

[0024] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a kind of super-low temperature double eccentric elastic sealing butterfly valve, the inside of valve body 1 is provided with valve plate 2, the rear side of valve plate 2 is provided with valve stem 3, valve stem 3 is located at the eccentricity of valve plate 2, the inside of valve body 1 is opened with cavity 4, the upper end of valve stem 3 rotates and penetrates into the inside of cavity 4, drive rod 5 is rotatably connected in the inside of cavity 4, the upper end of drive rod 5 rotates and penetrates out of the inside of valve body 1, movable disc 8 is movably sleeved on the outside of valve stem 3, the upper end of valve stem 3 is fixedly connected with fixed disc 9, the lower surface of fixed disc 9 is fixedly connected with butt joint rod 10, the upper surface of movable disc 8 is opened with butt joint groove 11, butt joint groove 11 and butt joint rod 10 are adapted, the surface of movable disc 8 is provided with drive assembly.

[0025] Drive assembly includes two round rods 7, two round rods 7 are all fixedly connected with the upper surface of movable disc 8, the upper surface of valve body 1 is opened with two arc grooves 6, two arc grooves 6 are all communicated with cavity 4.

[0026] Two round rods 7 are slidably connected in the inside of two arc grooves 6, and the upper end of round rod 7 extends out of the inside of cavity 4.

[0027] The upper end of two round rods 7 is fixedly connected with fixed ring 12, and the outside of fixed ring 12 is fixedly connected with lifting handle 22.

[0028] Wherein, through the cooperation of arc groove 6 and round rod 7, the maximum rotation angle of fixed ring 12 will not exceed 90 degrees, to avoid excessive compression of sealing surface to cause damage.

[0029] The outer movable sleeve of the driving rod 5 is provided with a first connecting ring 14, the first connecting ring 14 is slidably sleeved on the outside of the round rod 7, the inside of the first connecting ring 14 is provided with a groove 19, and the surface of the round rod 7 is fixedly connected with a fixed block 20 located in the inside of the groove 19.

[0030] The outer rotating sleeve of the driving rod 5 is provided with a second connecting ring 13, the second connecting ring 13 and the first connecting ring 14 are fixedly connected with a spring 15, and the spring 15 is movably sleeved on the outside of the driving rod 5.

[0031] The outer side of the driving rod 5 is fixedly connected with a rotating handle 21.

[0032] The inside of the cavity 4 is fixedly connected with a motor 16, the output shaft of the motor 16 is fixedly connected with a first gear 17, the outside of the first gear 17 is meshedly connected with a second gear 18, and the second gear 18 is fixedly sleeved on the outside of the valve rod 3.

[0033] Among them, the motor 16 is also matched with a power supply, a wire, a controller and a microcomputer, and the like structure, because it is not the main structure, it will not be described too much.

[0034] Working principle:

[0035] When the ultra-low temperature double eccentric elastic sealing butterfly valve is used, if it is necessary to manually open or close the valve body 1, the rotating handle 21 is held and then the lifting handle 22 is hooked by the fingers, at this time, the lifting handle 22 is arranged to drive the movement of the fixed ring 12, the movement of the fixed ring 12 can drive the movement of the round rod 7, the movement of the round rod 7 can drive the movement of the movable disc 8, at this time, the movable disc 8 will move on the outside of the valve rod 3, the subsequent butt joint rod 10 will be clamped into the inside of the butt joint groove 11, so as to realize the connection of the movable disc 8 and the fixed disc 9, and the subsequent rotating handle 21 and lifting handle 22 can realize the movement of the round rod 7 in the inside of the arc-shaped groove 6, so as to drive the valve rod 3 to rotate under the rotation of the driving rod 5, so as to realize the rotation of the valve plate 2 and the opening of the valve body 1.

[0036] At the same time, the cooperation of the groove 19 and the fixed block 20 will drive the movement of the first connecting ring 14 when the round rod 7 moves, and because the second connecting ring 13 is rotatably sleeved on the outside of the driving rod 5, the spring 15 will be deformed when the first connecting ring 14 moves, and the reset of the first connecting ring 14 and the movable disc 8 can be realized by the elastic force of the spring 15 itself, and the rotation of the valve rod 3 cannot be realized when the rotating handle 21 is rotated alone.

[0037] When it is needed to drive the valve rod 3 to rotate by external power, the switch of the motor 16 is opened, at this time, the rotation of the valve rod 3, i.e. the opening or closing of the valve body 1, can be realized by the cooperation of the first gear 17 and the second gear 18.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultra-low temperature double-eccentric elastomeric seal butterfly valve comprising a valve body (1), characterized in that: The inside of the valve body (1) is provided with a valve plate (2), the rear side of the valve plate (2) is provided with a valve rod (3), the valve rod (3) is located at the eccentric position of the valve plate (2), the inside of the valve body (1) is provided with a cavity (4), the upper end of the valve rod (3) rotates and penetrates into the inside of the cavity (4), the inside of the cavity (4) is rotatably connected with a driving rod (5), the upper end of the driving rod (5) rotates and penetrates out of the inside of the valve body (1), the outside of the valve rod (3) movably sheaths an activity disc (8), the upper end of the valve rod (3) is fixedly connected with a fixed disc (9), the lower surface of the fixed disc (9) is fixedly connected with a butt joint rod (10), the upper surface of the activity disc (8) is provided with a butt joint groove (11), the butt joint groove (11) is matched with the butt joint rod (10), and the surface of the activity disc (8) is provided with a driving assembly.

2. The ultra-low temperature double offset, elastomeric seal butterfly valve of claim 1, wherein: The driving assembly comprises two round rods (7), both the round rods (7) are fixedly connected with the upper surface of the activity disc (8), and the upper surface of the valve body (1) is provided with two arc-shaped grooves (6) communicating with the cavity (4).

3. The ultra-low temperature double offset, elastomeric seal butterfly valve of claim 2, wherein: Both the round rods (7) are slidably connected in the two arc-shaped grooves (6), and the upper end of the round rod (7) extends out of the inside of the cavity (4).

4. The ultra-low temperature double offset, elastomeric seal butterfly valve of claim 3, wherein: The upper end of each of the round rods (7) is fixedly connected with a fixed ring (12), and the outside of the fixed ring (12) is fixedly connected with a lifting handle (22).

5. An ultra-low temperature double offset, elastomeric seal butterfly valve as defined in claim 4, wherein: The outside of the driving rod (5) movably sheaths a first connecting ring (14), the first connecting ring (14) is slidably sheathed outside the round rod (7), the inside of the first connecting ring (14) is provided with a groove (19), and the surface of the round rod (7) is fixedly connected with a fixed block (20) located in the inside of the groove (19).

6. An ultra-low temperature double offset, elastomeric seal butterfly valve as defined in claim 5, wherein: The outside of the driving rod (5) rotatably sheaths a second connecting ring (13), the second connecting ring (13) and the first connecting ring (14) are fixedly connected with a spring (15), and the spring (15) movably sheaths the outside of the driving rod (5).

7. The ultra-low temperature double offset, elastomeric seal butterfly valve of claim 6, wherein: The outside of the driving rod (5) is fixedly connected with a rotating handle (21).

8. The ultra-low temperature double offset, elastomeric seal butterfly valve of claim 1, wherein: The inside of the cavity (4) is fixedly connected with a motor (16), the output shaft of the motor (16) is fixedly connected with a first gear (17), the outside of the first gear (17) is meshedly connected with a second gear (18), and the second gear (18) fixedly sheaths the outside of the valve rod (3).

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