CN217898813U

CN217898813U - Urea butterfly valve

Info

Publication number: CN217898813U
Application number: CN202220844326.2U
Authority: CN
Inventors: 尹鹏; 李梅; 肖传耀; 王宽; 王靓健
Original assignee: Parker Wuxi Valve Co ltd
Current assignee: Parker Wuxi Valve Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-11-25
Anticipated expiration: 2032-04-12

Abstract

The utility model relates to a butterfly valve, in particular to a urea butterfly valve, which comprises a valve body and a valve plate, wherein the valve body is provided with a valve hole; further comprising: the valve rod is rotatably arranged in a shaft hole of the valve body, the shaft hole is communicated with the valve hole, and the valve plate is fixed on the valve rod and is movably positioned in the valve hole; the packing sealing devices are arranged at two ends of the shaft hole and are in rotary connection with the valve rod; the rotating supports are fixed at two ends of the valve body; and the rotary connecting device is arranged on the rotary support and is connected with the valve rod. The utility model provides a pair of urea butterfly valve sets up rotating-structure in the both sides of valve body, and the rotation of valve rod is not influenced by the crystallization of medium, and the long service life of valve, switch are nimble to the atress of valve rod is even, can bear the pressure differential of bigger operating mode pressure, and the runner of valve body does not have the dead angle smoothly.

Description

Urea butterfly valve

Technical Field

The utility model relates to a butterfly valve, especially a urea butterfly valve.

Background

At present, butterfly valves of most of existing valve manufacturers adopt a built-in bearing structure, and a bearing is located inside a valve body. Since there are situations where the transport medium is prone to crystallization on a urea synthesis plant, the built-in bearing structure enables the medium to directly contact the bearings and crystallization to easily occur at the bearing gaps. The crystallized medium not only corrodes metal parts, but also causes the bearing to be jammed, thereby influencing the normal opening and closing of the valve.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a set up the rotating-structure in the outside of valve body, the valve rod atress is even, the valve rod rotates a urea butterfly valve that does not receive the crystallization of medium to influence, and concrete technical scheme is:

a urea butterfly valve comprises a valve body and a valve plate, wherein a valve hole is formed in the valve body; further comprising: the valve rod is rotatably arranged in a shaft hole of the valve body, the shaft hole is communicated with the valve hole, and the valve plate is fixed on the valve rod and is movably positioned in the valve hole; the packing sealing devices are arranged at two ends of the shaft hole and are in rotary connection with the valve rod; the rotating supports are fixed at two ends of the valve body; and the rotary connecting device is arranged on the rotary support and is connected with the valve rod.

Preferably, the rotary connecting device comprises: the rotating seat is arranged on the rotating bracket; the shaft sleeve or the bearing is arranged on the rotating seat, and the valve rod is arranged on the shaft sleeve or the bearing; the lubricating ring is arranged on the rotating seat and is positioned on one side of the rotating seat; the positioning seat is arranged at the end part of the valve rod and is positioned on one side of the lubricating ring; and the positioning bolt is movably inserted on the positioning seat and is connected with the valve rod, and the positioning bolt is used for tightly pressing the positioning seat on the lubricating ring.

Wherein, still include: and the stop gasket is arranged between the positioning bolt and the positioning seat.

Furthermore, a lubricating conical surface is arranged on the lubricating ring, a rotating conical surface is arranged on the positioning seat, the rotating conical surface is movably pressed on the lubricating conical surface, and the rotating conical surface and the lubricating conical surface have different tapers.

Preferably, the positioning device further comprises a cover plate, the cover plate is fixed on the rotating seat, and the positioning bolt and the positioning seat are located in the cover plate.

Preferably, the stuffing seal comprises: the guide sleeve is fixed in the valve hole; the packing bottom ring is arranged in the valve hole and is positioned on one side of the guide sleeve; the sealing ring is arranged in the valve hole and is positioned on one side of the packing bottom ring; the packing top ring is positioned on one side of the sealing ring; the compression ring is installed in the valve hole, and the packing top ring is installed on the compression ring; and the packing flange is arranged on the valve body and is tightly pressed on the compression ring.

Furthermore, a positioning ring is arranged on the guide sleeve and is tightly pressed on a shaft shoulder of the shaft hole.

Furthermore, a first pressing conical surface is arranged on the packing flange, a second pressing conical surface is arranged on the pressing ring, and the first pressing conical surface is pressed on the second pressing conical surface.

Preferably, a connecting ring is arranged at the bottom of the packing top ring, a connecting groove is arranged at the bottom of the compression ring, and the connecting ring is inserted into the connecting groove.

Compared with the prior art the utility model discloses following beneficial effect has:

the utility model provides a pair of urea butterfly valve sets up revolution mechanic in the both sides of valve body, and the rotation of valve rod is not influenced by the crystallization of medium, and the long service life of valve, switch are nimble to the atress of valve rod is even, can bear the pressure differential of bigger operating mode pressure, and the runner of valve body is smooth does not have the dead angle.

Drawings

FIG. 1 is a schematic diagram of a urea butterfly valve;

FIG. 2 is a front view of a urea butterfly valve;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

FIG. 5 is an exploded view of the swivel joint assembly;

FIG. 6 is a cross-sectional view of the stuffing seal;

fig. 7 is an exploded view of the stuffing seal.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1 to 7, the urea butterfly valve comprises a valve body 1, a valve plate 2, a valve rod 3, a packing sealing device, a rotating bracket 7 and a rotating connecting device.

The valve body 1 is a cylinder, and valve opening 11 and shaft hole are equipped with on the valve body 1, and valve opening 11 is located the axis, and the shaft hole communicates with each other with valve opening 11, and the axis of valve body 1 is passed in the shaft hole, and the bilateral symmetry of valve body 1 is equipped with connection plane, and valve opening 11 passes connection plane, and rotating bracket 7 passes through the bolt fastening on connection plane, and connection plane makes things convenient for rotating bracket 7's fixed.

Packing sealing device installs the both ends in the shaft hole, and rotates with valve rod 3 and be connected, and valve plate 2 is fixed on valve rod 3, and valve plate 2 activity is located valve opening 11. The rotary connection device is mounted on the rotary bracket 7 and is connected with the valve rod 3.

Because the both sides of valve opening 11 all are equipped with the shaft hole, the interior runner of valve body 1 is simplified, does not have unnecessary part and dead angle on the whole valve body 1 runner, prevents the crystallization of medium.

Specifically, the packing sealing device comprises a compression ring 42, a packing top ring 43, a sealing ring 44, a packing bottom ring 45 and a guide sleeve 46 which are sequentially arranged in a shaft hole from outside to inside, and further comprises a packing flange 41, wherein the packing flange 41 is connected with the valve body 1 through bolts and is compressed on the top of the compression ring 42. A first pressing conical surface 411 is arranged on the packing flange 41, a second pressing conical surface 422 is arranged on the pressing ring 42, and the first pressing conical surface 411 is pressed on the second pressing conical surface 422; the pressing conical surface can form pre-pressure, so that the stable pressing of the packing sealing device is realized. The bottom of packing top ring 43 is provided with connecting ring 431, the bottom of clamp ring 42 is provided with connecting groove 421, connecting ring 431 is inserted in connecting groove 421, and connecting groove 421 and connecting ring 431 can facilitate clamp ring 42 to compress packing top ring 43. A positioning ring 461 is arranged on the guide sleeve 46, and the positioning ring 461 is tightly pressed on the shaft shoulder of the shaft hole. The positioning ring 461 fixes the position of the guide sleeve 46 and prevents the guide sleeve 46 from moving axially. The packing flange 41 and the retaining ring 461 effect the axial positioning of the sealing ring 44. The valve rod 3 is movably inserted on the guide sleeve 46, the packing bottom ring 45, the sealing ring 44 and the packing top ring 43.

The rotary connection device comprises a rotary seat 6, a shaft sleeve 55 or a bearing, a lubricating ring 56, a positioning seat 54, a positioning bolt 53, a stop washer 52 and a cover plate 51. The rotating seat 6 is arranged on the rotating bracket 7 through a bolt; the bearing or the bearing is arranged in a rotating hole of the rotating seat 6, and the valve rod 3 is arranged on the shaft sleeve 55 or the bearing; the lubricating ring 56 is arranged at the top of the rotating hole, and a lubricating conical surface 561 is arranged on the lubricating ring 56; the positioning seat 54 is installed at the end of the valve rod 3 and located at one side of the lubricating ring 56, the positioning seat 54 is provided with a rotating conical surface 541, the positioning bolt 53 is movably inserted on the positioning seat 54 and connected with the valve rod 3, the positioning bolt 53 movably presses the rotating conical surface 541 on the lubricating conical surface 561, the rotating conical surface 541 and the lubricating conical surface 561 have different tapers, the contact area between the rotating conical surface 541 and the lubricating conical surface 561 is reduced, the friction force is reduced, and therefore the valve plate 2 can rotate smoothly. The lubricating ring 56 is a copper ring having a self-lubricating function. The stop washer 52 is installed between the positioning bolt 53 and the positioning seat 54, and the stop washer 52 prevents the positioning bolt 53 from loosening, so that the valve rod 3 is prevented from moving along the axial direction, the position of the valve plate 2 is unchanged, and the sealing performance and smooth opening and closing of the butterfly valve are ensured. The cover plate 51 is fixed on the rotating seat 6, and the positioning bolt 53 and the positioning seat 54 are both positioned in the cover plate 51. The cover plate 51 protects the positioning seat 54 and the lubricating ring 56 from foreign matter such as dust.

An external rotating structure is adopted, the shaft sleeve 55 or the bearing is arranged outside the valve body 1, the medium is isolated from the bearing or the shaft sleeve 55, and crystallization of the medium at the bearing or the shaft sleeve 55 is avoided. The corrosion prevention requirement on the bearing or the shaft sleeve 55 is reduced, the conventional material can be adopted, and the cost is reduced. When bearing or axle sleeve 55 are changed, need not dismouting valve plate 2, it is convenient to maintain.

The two ends of the valve rod 3 are guided in a double mode, stress is distributed evenly, and the valve rod 3 can bear pressure difference of larger working condition pressure.

And no valve seat is arranged, and the flow channel of the valve body 1 is smooth and has no dead angle.

And parts such as a sealing ring 44 pressing ring and the like are not needed, so that the number of parts of the butterfly valve is reduced.

The technical principle of the present invention has been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the claims of the present invention.

Claims

1. A urea butterfly valve comprises a valve body (1) and a valve plate (2), wherein a valve hole (11) is formed in the valve body (1); it is characterized by also comprising:

the valve rod (3) is rotatably arranged in a shaft hole of the valve body (1), the shaft hole is communicated with the valve hole (11), and the valve plate (2) is fixed on the valve rod (3) and movably positioned in the valve hole (11);

the packing sealing devices are arranged at two ends of the shaft hole and are rotationally connected with the valve rod (3);

the rotary supports (7), the rotary supports (7) are fixed at two ends of the valve body (1); and

and the rotating connecting device is arranged on the rotating bracket (7) and is connected with the valve rod (3).

2. A urea butterfly valve according to claim 1, wherein said rotary connection means comprise:

the rotating seat (6), the rotating seat (6) is installed on the rotating bracket (7);

a shaft sleeve (55) or a bearing, wherein the shaft sleeve (55) or the bearing is arranged on the rotating seat (6), and the valve rod (3) is arranged on the shaft sleeve (55) or the bearing;

a lubrication ring (56), the lubrication ring (56) being mounted on the rotating seat (6) and located on one side of the rotating seat (6);

the positioning seat (54) is arranged at the end part of the valve rod (3), and is positioned at one side of the lubricating ring (56); and

the positioning bolt (53) is movably inserted on the positioning seat (54) and connected with the valve rod (3), and the positioning bolt (53) is used for pressing the positioning seat (54) on the lubricating ring (56).

3. The urea butterfly valve of claim 2, further comprising:

a stop washer (52), the stop washer (52) being mounted between the positioning bolt (53) and the positioning seat (54).

4. The urea butterfly valve according to claim 2, wherein the lubricant ring (56) is provided with a lubricant cone surface (561), the positioning seat (54) is provided with a rotating cone surface (541), the rotating cone surface (541) is movably pressed on the lubricant cone surface (561), and the rotating cone surface (541) and the lubricant cone surface (561) have different tapers.

5. The urea butterfly valve according to claim 2, further comprising a cover plate (51), said cover plate (51) being fixed to said rotating seat (6), said positioning bolt (53) and said positioning seat (54) being located inside said cover plate (51).

6. A urea butterfly valve according to any one of claims 1 to 5, characterised in that said stuffing seal comprises:

the guide sleeve (46), the said guide sleeve (46) is fixed in said valve hole (11);

the packing bottom ring (45) is installed in the valve hole (11) and is positioned on one side of the guide sleeve (46);

a sealing ring (44), wherein the sealing ring (44) is installed in the valve hole (11) and is positioned on one side of the packing bottom ring (45);

a packing top ring (43), the packing top ring (43) being located on one side of the sealing ring (44);

a compression ring (42), the compression ring (42) being mounted within the valve bore (11), the packing top ring (43) being mounted on the compression ring (42); and

the packing flange (41), the packing flange (41) is installed on the valve body (1) and is pressed on the compression ring (42).

7. The urea butterfly valve according to claim 6, wherein a positioning ring (461) is arranged on the guide sleeve (46), and the positioning ring (461) is pressed on a shaft shoulder of the shaft hole.

8. A urea butterfly valve according to claim 6, characterized in that said packing flange (41) is provided with a first pressing cone (411), said pressing ring (42) is provided with a second pressing cone (422), and said first pressing cone (411) presses against said second pressing cone (422).

9. A urea butterfly valve according to claim 6, characterized in that the bottom of the packing top ring (43) is provided with a connecting ring (431), the bottom of the compression ring (42) is provided with a connecting groove (421), and the connecting ring (431) is inserted in the connecting groove (421).