CN219888868U - Bellows stop valve - Google Patents

Abstract

The utility model discloses a corrugated pipe stop valve which comprises a valve body, wherein one end of a sleeve is fixedly connected with the valve body through a connecting fixing piece, the inside of the other end of the sleeve is in threaded fit with the middle part of an upper valve rod, the upper end of the upper valve rod is fixedly provided with a handle, the lower end of the upper valve rod is connected with the upper end of a lower valve rod, the lower end of the lower valve rod is matched with the valve body, a corrugated pipe welding assembly is sleeved on the lower end of the lower valve rod, a trapezoid corrugated pipe is sleeved on the lower valve rod, the lower end of the trapezoid corrugated pipe is connected with the corrugated pipe welding assembly, the upper end of the trapezoid corrugated pipe is connected with the upper end of the lower valve rod, and a guide ring is arranged on the upper end of the lower valve rod. The structural design of the trapezoid corrugated pipe ensures that the trapezoid corrugated pipe cannot retain the medium when the trapezoid corrugated pipe is fully opened, and only a small space can retain the medium when the trapezoid corrugated pipe is closed, but the whole trapezoid corrugated pipe cannot be destructively influenced, so that the sealing performance of the stop valve and the sealing performance of the valve head are improved.

Description

Bellows stop valve

Technical Field

The utility model relates to the field of valves, in particular to a corrugated pipe stop valve.

Background

The structure of the corrugated pipe of the existing corrugated pipe stop valve mainly comprises five common structures of U-shaped, V-shaped, S-shaped, omega-shaped and C-shaped corrugated pipes. Because the structural characteristic of the corrugated pipe can rotate in the axial direction and the radial direction, and the axial direction can realize larger compression and stretching rotation, the corrugated pipe with the five structures has respective advantages in various fields or working conditions, such as:

as shown in fig. 1 (a), the U-shaped bellows is the most widely used bellows at present, and is characterized by relatively good pressure resistance, high rigidity, long service life, relatively uniform stress, simple structure, and relatively small axial compression distance.

As shown in fig. 1 (B), the V-shaped bellows is mainly used for vibration resistance and noise reduction problems of aerospace, automobiles, and the like. The V-shaped corrugated pipe has the characteristics of good stability and low rigidity, the shape of the diaphragm of the V-shaped corrugated pipe is closer to the waveform when gas is pressurized, and the V-shaped corrugated pipe is widely applied to the aerospace field and is suitable for reducing the condition of violent vibration.

As shown in fig. 1 (C), the S-shaped bellows is characterized by a higher bearing capacity, but a slightly lower compensation capacity, and a slightly lower axial compression distance and stiffness than the U-shape.

As shown in fig. 1 (D), the C-type bellows is characterized by a high bearing capacity but a low compensation capacity. The manufacturing process is simple, and the method can not be adopted under the conventional working condition.

As shown in fig. 1 (E), when the internal pressure is high, the omega-shaped bellows is deformed little by bending, and is not easily deformed in a plane, so that the omega-shaped bellows is particularly suitable for use in a case where the internal pressure is high, the deformation is small, and the caliber is large.

But cannot completely cover the working conditions, for example, in the working condition that some media are high-temperature liquid metal, (1) if an omega-shaped/S-shaped corrugated pipe stop valve is adopted, the pressure-bearing requirement can be met, but the axial compression amount and the compensation capability are lower, so that the valve circulation capability is low, the medium circulation resistance is high, the omega-shaped/S-shaped valve is placed in a direction rotated by 90 degrees when the valve is horizontally installed, when the media are not circulated, a metal solution stays in a groove part of the corrugated pipe, if the temperature is reduced, solidification occurs in the area for a long time, dead angles are formed, the corrugated pipe is fixed and cannot be compressed, the valve cannot be normally opened and closed, and thus, the risk of leakage caused by the fact that the valve rod threads are damaged or the corrugated pipe is broken is possibly caused by forcibly operating the handle to open and close the valve is caused when the valve is forcedly operated, as shown in fig. 2 (F) and fig. 2 (G). (2) If the U-shaped corrugated pipe stop valve is adopted, the pressure bearing and the area forming the dead angle of the metal liquid medium in the corrugated pipe can be met, but the compression amount and the compensation capacity of the corrugated pipe are only slightly better than those of other structures, and the compression amount and the compensation capacity of the corrugated pipe are not improved.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, provides a corrugated pipe stop valve, adds a corrugated pipe stop valve which can achieve higher compression and compensation capacity under specific working conditions on the basis of five corrugated pipes with structures in the current application environment, compensates the defects of the corrugated pipe by designing corresponding structures, and has better service life on the premise of meeting the functional performance.

The aim of the utility model is realized by the following technical scheme:

the utility model provides a bellows stop valve, includes valve body, sleeve pipe, bellows welding set spare, trapezoidal bellows, guide ring, lower valve rod, upper valve rod, handle and connection mounting, sheathed tube one end is passed through connection mounting with the valve body is fixed link to each other, the sheathed tube other end inside with the middle part screw-thread fit of upper valve rod, the upper end of upper valve rod is fixed to be provided with the handle, the lower extreme of upper valve rod with the upper end of lower valve rod links to each other, the lower extreme of lower valve rod with the valve body cooperation, bellows welding set spare cover is established on the lower extreme of lower valve rod and with the inner wall sealing fit of valve body, trapezoidal bellows cover establish on the lower valve rod and the lower extreme with bellows welding set spare sealing fit links to each other, the upper end of trapezoidal bellows with the upper end sealing fit of lower valve rod links to each other, the guide ring sets up on the upper end of lower valve rod and with telescopic inner wall cooperation.

Further, the bellows welding assembly comprises a bellows positioning ring and a bellows sealing ring, the outer wall of the bellows sealing ring is in sealing fit with the valve body, the lower end of the trapezoid bellows is in sealing welding between the inner wall of the bellows sealing ring and the outer wall of the bellows positioning ring, and the middle part of the bellows positioning ring is provided with a through hole penetrating through and matched with the lower valve rod.

Further, a limiting groove is formed in the middle of the lower end of the upper valve rod, and a limiting end matched with the limiting groove is arranged at the upper end of the lower valve rod.

Further, the end part of the limiting end head is provided with a spherical surface, and the top of the spherical surface is in contact with the bottom of the limiting groove.

Further, a first air hole and a second air hole which penetrate through the side wall of the sleeve are formed in the side wall of the sleeve, and the first air hole and the second air hole are respectively formed in two sides of the guide ring.

Further, a conical surface is arranged on the outer wall of the corrugated pipe sealing ring, and a conical groove matched with the conical surface is arranged on the valve body.

Further, the end of the sleeve acts on the end of the bellows seal ring.

Further, the connecting fixing piece is a nut.

Further, in the trapezoid corrugated pipe, the height of the trapezoid is 3.5-8 mm, the width of the top of the trapezoid is 2-2.2 mm, and the top of the trapezoid is provided with a chamfer.

Further, the guide ring is disposed between the lower stem and the upper stem.

The beneficial effects of the utility model are as follows:

1) In this bellows stop valve, the structural design of trapezoidal bellows makes the trapezoidal bellows can not be detained the medium when full open, and only less space can be detained the medium but can not produce destructive effect to whole bellows when closing, and has improved the sealing performance and the valve head sealing performance of this stop valve, reduces the possibility that the liquid metal medium is detained the back cooling hardening in the bellows to reduce the damage probability of bellows, improve life.

2) In the corrugated pipe stop valve, the corrugated pipe welding assembly realizes a hard sealing structure, is not applicable to accessories such as gaskets and the like to participate in sealing, and improves the sealing performance.

3) In this bellows stop valve, set up lower valve rod and last valve rod, two segmentation valve rod structures and the guide ring structure of low friction, reduce the rotation of lower valve rod and the wearing and tearing of valve head and disk seat, reduce the valve internal leakage probability to and adopt the sealed valve gap of line contact, reduce the valve external leakage probability.

Drawings

FIG. 1 is a cross-sectional view of five bellows in the prior art;

FIG. 2 is a schematic diagram of a prior art metal solution retained in a bellows;

FIG. 3 is a diagram showing the connection structure of the bellows stop valve;

FIG. 4 is an enlarged connection block diagram at G of FIG. 3;

FIG. 5 is an enlarged connection block diagram at H of FIG. 3;

FIG. 6 is a cross-sectional view of the present trapezoidal bellows;

in the figure, a 1-valve body, a 2-sleeve, a 3-trapezoid corrugated pipe, a 4-guide ring, a 5-lower valve rod, a 6-upper valve rod, a 7-handle, an 8-connection fixing piece, a 9-corrugated pipe positioning ring, a 10-corrugated pipe sealing ring, an 11-limiting groove, a 12-limiting end, a 13-first air hole and a 14-second air hole.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

Referring to fig. 1-6, the present utility model provides a technical solution:

the utility model provides a bellows stop valve, including valve body 1, sleeve pipe 2, bellows welding set spare, trapezoidal bellows 3, guide ring 4, lower valve rod 5, go up valve rod 6, handle 7 and connection mounting 8, the one end of sleeve pipe 2 is through connection mounting 8 and the fixed continuous of valve body 1, the inside middle part screw thread fit of going up valve rod 6 of the other end of sleeve pipe 2, the fixed handle 7 that is provided with of upper end of going up valve rod 6, the lower extreme of going up valve rod 6 links to each other with the upper end of lower valve rod 5, the lower extreme of lower valve rod 5 cooperates with valve body 1, bellows welding set spare cover is established on the lower extreme of lower valve rod 5 and with the inner wall sealing fit of valve body 1, trapezoidal bellows 3 cover is established on lower valve rod 5 and the lower extreme links to each other with bellows welding set spare sealing fixation, the upper end of trapezoidal bellows 3 links to each other with the upper end sealing fixation of lower valve rod 5, guide ring 4 sets up on the upper end of lower valve rod 5 and cooperates with the inner wall of sleeve pipe 2. The end of the sleeve 2 acts on the end of the bellows seal ring 10. The connecting fixture 8 is a nut. The guide ring 4 is arranged between the lower valve stem 5 and the upper valve stem 6. Wherein, the valve body 1 controls fluid flow, the lower extreme control fluid of lower valve rod 5 makes and break-make, and the effect of upper valve rod 6 is the upper and lower removal of drive lower valve rod 5, and handle 7 facilitates the user's operation, and trapezoidal bellows 3 realizes sealedly with bellows welded component better cooperation, and the effect of guide ring 4 is the axiality of guaranteeing lower valve rod 5 and upper valve rod 6 in the course of the work, and the effect of connecting mounting 8 is in the same place valve body 1 and sleeve pipe 2 fixed, and sleeve pipe 2 is used for installing lower valve rod 5 and upper valve rod 6.

In some embodiments, the bellows welding assembly comprises a bellows positioning ring 9 and a bellows sealing ring 10, the outer wall of the bellows sealing ring 10 is in sealing fit with the valve body 1, the lower end of the trapezoid bellows 3 is in sealing welding between the inner wall of the bellows sealing ring 10 and the outer wall of the bellows positioning ring 9, and the middle part of the bellows positioning ring 9 is provided with a through hole penetrating through and matched with the lower valve rod 5. The outer wall of the bellows sealing ring 10 is provided with a conical surface, and the valve body 1 is provided with a conical groove matched with the conical surface. A common bellows valve stem seal for low leakage valve cap seals is a planar gasket seal, which requires the use of a gasket to assist in sealing, which is not the best choice for higher pressure and low leakage rate requirements. The line contact hard sealing structure is adopted in the patent, a conical groove is formed in the valve body 1, a conical surface is formed in the outer wall of the corrugated pipe sealing ring 10, after the line contact hard sealing structure and the conical surface are matched and contacted, the line contact hard sealing structure is compressed by a nut, so that the line contact hard sealing structure is directly contacted and sealed without auxiliary packing or accessories, and the requirements of low leakage rate and high bearing capacity are met.

In some embodiments, a limit groove 11 is arranged in the middle of the lower end of the upper valve rod 6, and a limit end head 12 matched with the limit groove 11 is arranged at the upper end of the lower valve rod 5. The end of the limiting end head 12 is provided with a spherical surface, and the top of the spherical surface is contacted with the bottom of the limiting groove 11. The upper end of the lower valve rod 5 is a limit end 12 with a T-shaped structure, the upper valve rod 6 is a limit groove 11 with a groove, the limit end 12 and the limit groove are matched with each other for use, when the valve needs to be closed, the lower valve rod 5 is pushed by a plane above the groove of the upper valve rod 6 to seal, and at the moment, the contact position of the upper valve rod and the lower valve rod is surface-to-surface contact. This patent lower valve rod T type upper end designs to spherical face, makes its formation point face contact or less face and face contact, and the contact surface is less the frictional force is less the same the less when the pressure that needs compress tightly lower valve rod 5 when the valve is closed, and then lower valve rod 5 is forced rotatory probability is less the more to reach the lower valve rod and reduce the rotatory drawback that produces wearing and tearing to the disk seat.

In some embodiments, the side wall of the sleeve 2 is provided with a first air hole 13 and a second air hole 14 which penetrate through, and the first air hole 13 and the second air hole 14 are respectively arranged at two sides of the guide ring 4. The first air hole 13 is provided near the valve body 1 side. In order to avoid the condition that the concentricity of the lower valve rod 5 is reduced by the point-to-surface contact operation, a guide ring 4 is further arranged in the middle to axially fix the joint of the lower valve rod 5 and the upper valve rod 6, and the guide ring 4 is made of a non-metal material with a self-lubricating effect so as to avoid the deflection of the lower valve rod 5 in the radial direction, so that the trapezoidal corrugated pipe 3 cannot deflect. And the first air hole 13 and the second air hole 14 are arranged at the upper and lower positions of the sleeve 6, so that pressure difference in the upper and lower side cavities of the guide ring 4 caused by the up and down movement of the guide ring 4 is avoided.

In some embodiments, the trapezoid corrugated pipe 3 has a trapezoid height of 3.5-8 mm, a trapezoid top width of 2-2.2 mm, and a chamfer is arranged at the trapezoid top. The technology adopted by the patent is the trapezoid corrugated pipe 3, the structure corrugated pipe is similar to a U-shaped structure and a V-shaped structure, but the trapezoid corrugated pipe 3 has better bearing capacity compared with the V-shaped corrugated pipe, and has larger compression capacity and compensation capacity compared with the U-shaped corrugated pipe; the unilateral bevel angle of the trapezoid corrugated pipe 3 is 10 degrees, when the limit compression degree is reached, the long side and the short side of the trapezoid are exchanged, the unilateral bevel angle is 10 degrees, so that the single compression of the trapezoid corrugated pipe can reach twice the compression amount of other corrugated pipes, the axial stroke of the trapezoid corrugated pipe is a great advantage, the service life of the trapezoid corrugated pipe 3 can be reduced in consideration of the fact that the limit position is adopted for opening and closing each time, three main parameters of unilateral angle limitation, trapezoid height and trapezoid short side length are regulated according to the valve nominal diameter and pressure bearing capacity, the unilateral angle influences the compression amount, the trapezoid height influences the compression toughness (service life) of the trapezoid corrugated pipe and indirectly influences the compression rate, the trapezoid short side length influences the compression toughness of the trapezoid corrugated pipe, when the unilateral angle is 5-10 degrees, the pressure bearing capacity, the compression amount and the compensation capacity of the trapezoid corrugated pipe 3 are good when the size ratio of the trapezoid height to the trapezoid short side length is 2.5-3.5 times.

In the description of the present utility model, it should be understood that the terms "bottom," "one end," "middle," "another end," "upper," "one side," "top," "inner," "two ends," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims (10)

1. A bellows stop valve, characterized in that: including valve body (1), sleeve pipe (2), bellows welding set, trapezoidal bellows (3), guide ring (4), lower valve rod (5), go up valve rod (6), handle (7) and connection mounting (8), the one end of sleeve pipe (2) is passed through connection mounting (8) with valve body (1) is fixed link to each other, the other end of sleeve pipe (2) inside with go up the middle part screw-thread fit of valve rod (6), the upper end of last valve rod (6) is fixed to be provided with handle (7), the lower extreme of last valve rod (6) with the upper end of lower valve rod (5) links to each other, the lower extreme of lower valve rod (5) with valve body (1) cooperation, bellows welding set cover is established on the lower extreme of lower valve rod (5) and with the inner wall sealing fit of valve body (1), trapezoidal bellows (3) cover is established on lower valve rod (5) and the lower extreme with bellows welding set up the upper end of trapezoidal bellows (3) with the upper end of lower valve rod (5) is in sealing fit with the upper end of lower valve rod (4).

2. A bellows shut-off valve according to claim 1, wherein: the corrugated pipe welding assembly comprises a corrugated pipe positioning ring (9) and a corrugated pipe sealing ring (10), wherein the outer wall of the corrugated pipe sealing ring (10) is in sealing fit with the valve body (1), the lower end of the trapezoid corrugated pipe (3) is in sealing welding between the inner wall of the corrugated pipe sealing ring (10) and the outer wall of the corrugated pipe positioning ring (9), and the middle part of the corrugated pipe positioning ring (9) is provided with a through hole penetrating through and matched with the lower valve rod (5).

3. A bellows shut-off valve according to any one of claims 1 or 2, wherein: the middle part of the lower end of the upper valve rod (6) is provided with a limiting groove (11), and the upper end of the lower valve rod (5) is provided with a limiting end (12) matched with the limiting groove (11).

4. A bellows stop valve according to claim 3, wherein: the end part of the limiting end head (12) is provided with a spherical surface, and the top of the spherical surface is contacted with the bottom of the limiting groove (11).

5. A bellows shut-off valve according to any one of claims 1 or 2, wherein: the side wall of the sleeve (2) is provided with a first air hole (13) and a second air hole (14) which penetrate through the side wall, and the first air hole (13) and the second air hole (14) are respectively arranged on two sides of the guide ring (4).

6. A bellows shut-off valve according to claim 2, wherein: the outer wall of the corrugated pipe sealing ring (10) is provided with a conical surface, and the valve body (1) is provided with a conical groove matched with the conical surface.

7. A bellows stop valve according to claim 6, wherein: the end of the sleeve (2) acts on the end of the bellows sealing ring (10).

8. A bellows shut-off valve according to any one of claims 1 or 2, wherein: the connecting fixing piece (8) is a nut.

9. A bellows shut-off valve according to any one of claims 1 or 2, wherein: in the trapezoid corrugated pipe (3), the height of a trapezoid is 3.5-8 mm, the width of the top of the trapezoid is 2-2.2 mm, and a chamfer is arranged on the top of the trapezoid.

10. A bellows shut-off valve as defined in claim 9 wherein: the guide ring (4) is arranged between the lower valve rod (5) and the upper valve rod (6).