CN212318832U - Balanced all-metal hard sealing sleeve valve - Google Patents

Abstract

The utility model provides a balanced type all-metal hard seal cover cylinder valve, includes valve body, lower valve body, valve rod, balance cylinder, disk seat, sleeve, whole sealed case, white steel clamp graphite winding pad, pressure-bearing concave ring, whole sealing ring, elastic guide ring, a serial communication port, pressure-bearing concave ring, whole sealing ring and elastic guide ring belong to the partly of whole sealed case, whole sealing ring cross-section is the split ring thin slice of taking the arc shape, the balance cylinder inner wall is hugged closely to whole sealing ring, at whole sealing ring front end pressure-bearing concave ring, there is structural groove in the centre, design elastic guide ring below the recess, rampart and balance cylinder inner wall contact cooperation, six balancing holes of equipartition on the whole sealed case, compare with prior art, the beneficial effects of the utility model: simple structure, convenient to use, the application is strong, and whole sealing ring changes along with medium pressure change, can be used to the poor occasion of high pressure, adopts whole seal structure, realizes sealed more easily for high temperature environment, and all-metal seals life-span firmly.

Description

Balanced all-metal hard sealing sleeve valve

Technical Field

The utility model relates to a sleeve governing valve field especially relates to an all metal hard seal sleeve valve of balanced type.

Background

The sleeve regulating valve is a variety developed in sixty years. The sleeve and valve core throttling mode replaces the valve core and valve seat throttling mode of single and double valve seats, and the balance type and the unbalance type are included, wherein the balance type is that the valve core is provided with balance holes which are symmetrically distributed in parallel to the axial direction, so that chambers on the upper end surface and the lower end surface of the valve core are communicated, most of forces acting on the valve core in the axial direction by a medium in the valve are mutually counteracted, and unbalanced forces generated by the medium on a valve rod are very small.

Traditional balanced type sleeve governing valve's case adopts fixed knot to construct, only offset through the pressure differential of medium intercommunication itself and come balanced valve internal pressure, medium pressure differential can't be offset completely to this kind of balance, still there is unbalanced force to case and valve rod, it reveals to take place easily, and the sealed two kinds of forms that adopt sealing washer or external seal device usually of governing valve are sealed, the sealing washer is nonmetal material, there is certain moulding and elasticity, the texture is softer, service temperature can not be higher than 220 usually, the circulation medium can not contain impurity, otherwise wear and tear easily, the high temperature problem has been solved to external seal device, but frictional resistance is big, long-time use is yielding, cause the valve seal to become invalid, be unfavorable for long-time frequent use, short service life.

Disclosure of Invention

The utility model provides a balanced all-metal hard sealing sleeve valve, in order to solve a series of technical problems brought by the traditional sealing form, the utility model is a balanced all-metal hard sealing sleeve valve, which adopts metal elastic hard sealing, and designs a valve plug and a sealing ring into a whole, a sliding sealing line for sealing is designed into a closed loop line moving along with the valve plug, the sealing ring belongs to a part of the valve plug, the stress is pressed on the inner wall of a balance cylinder, the whole structure does not need to be provided with a sealing structure again, the structure is simple, the installation is convenient, the whole sealing ring is of a metal structure, is not sensitive to the external temperature, the applicable temperature range is large, the whole sealing ring is not easy to deform, the sealing pressure is large, the sealing ring can be enhanced along with the pressure increase of a medium, the sealing performance is improved, the failure phenomenon can not occur because of the pressure increase, the good leakproofness of valve has been guaranteed, and sealing ring department design pressure-bearing concave ring has reduced the medium and has hurt the impact of sealing ring, guarantees the operational environment of sealing ring, and the elastic guide ring plays the support regulatory action, guarantees relative motion's axiality between valve plug and the sleeve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a balanced all-metal hard sealing sleeve valve comprises an upper valve body, a lower valve body, a valve rod, a balance cylinder, a valve seat, a sleeve, an integral sealing valve core, a white steel graphite winding pad, a pressure-bearing concave ring, an integral sealing ring and an elastic guide ring, wherein the upper valve body, the balance cylinder and the lower valve body are mutually matched and fixed, the valve seat and the sleeve are arranged at the position of a medium outlet in the lower valve body, the balanced all-metal hard sealing sleeve valve is characterized in that the integral sealing valve core is of a lower-part lengthened sleeve structure, the upper part of the integral sealing valve core is provided with a sealing structure, a matching internal thread hole is arranged in the middle of the integral sealing valve core, the valve rod and the integral sealing valve core are matched and connected through the internal thread hole, the outer wall of the integral sealing valve core is in matching contact with the inner wall of the balance cylinder, the pressure-bearing concave ring, the integral sealing, the assembled integral sealing ring is tightly attached to the inner wall of the balance cylinder, a circular pressure-bearing concave ring is arranged at the front end of an opening of the integral sealing ring, a structural groove is arranged at the middle position of the integral sealing valve core, a semi-ring type elastic guide ring is designed below the groove, the annular wall of the elastic guide ring is in contact fit with the inner wall of the balance cylinder, the lower end of the integral sealing valve core is in fit seal with the valve seat and the sleeve, and six balance holes are uniformly distributed on the integral sealing valve core.

Static sealing positions of the upper valve body and the balance cylinder, the lower valve body and the valve seat and the like are sealed by white steel graphite-sandwiched winding gaskets.

The integral sealing valve core and the valve seat are sealed by conical surfaces, and the integral sealing valve core and the sleeve are sealed by cylindrical surfaces.

The valve rod and the integral sealing valve core are positioned by a conical surface and are in threaded connection.

The sleeve valve medium is liquid.

The valve rod of the sleeve valve, the balance cylinder and the inner cavity of the integral sealing valve core are filled with media.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the balanced all-metal hard sealing sleeve valve has the advantages that the integral sealing ring and the integral sealing valve core are of an integral metal structure, the structure is simple, the processing is convenient, the application range is wide, the metal structure is not easy to wear and deform, the requirements on temperature, environment and medium conditions are not high, the valve can work under the conditions of high temperature, normal temperature, low temperature, high and low temperature alternation, severe environment, more medium impurities and the like, the applicability is wide, the selection range is large, and most of engineering requirements are met.

2) The balanced all-metal hard sealing sleeve valve is strong in sealing performance of the whole sealing ring, the sealing pressing force is enhanced along with the increase of medium pressure, the sealing performance is enhanced, leakage is not prone to occurring, the semicircular whole sealing ring has certain elasticity, the sealing contact surface can be automatically adjusted according to the matching condition in the using process, the whole sealing ring and the balance cylinder are always kept in contact with the inner wall of the balance cylinder, the whole sealing ring and the balance cylinder are in a dynamic contact sealing state, and the balanced all-metal hard sealing sleeve valve is suitable for high-pressure, vibration and frequent braking environments.

3) The sealing structure is a whole sliding seal, the sealing line is only a sliding sealing line moving along with the valve plug, sealing is easier to realize, abrasion is not easy to occur, and the service life of the all-metal hard seal is long.

4) According to the balanced all-metal hard sealing sleeve valve, the pressure-bearing concave ring in front of the whole sealing ring bears the pressure caused by medium flowing, the whole sealing ring is protected to be very small by the medium pressure, the pressure of the upper cross section and the lower cross section of the whole sealing ring is balanced, the whole sealing ring is protected from being damaged by pressure, the service life of the whole sealing ring is prolonged, and the service life of the sleeve valve is prolonged.

5) The balanced all-metal hard sealing sleeve valve has the advantages that the rigidity of the elastic guide ring at the lower part is high, the supporting effect is achieved, the coaxiality is guaranteed on the premise that the relative motion between the integral sealing valve core and the sleeve is kept, meanwhile, the elastic guide ring with the high rigidity has a certain protection effect on the integral sealing ring, the phenomenon that the deformation of the integral sealing ring exceeds an allowable limit due to external force is prevented, the sealing function of the integral sealing ring is guaranteed, the sealing service life is long, and the sealing effect is good.

6) The balanced all-metal hard sealing sleeve valve has the advantages that the static seal is good in sealing performance due to the fact that the white steel and the graphite winding pad are used for static sealing, the elasticity is high, certain displacement compensation can be conducted, the installation precision is improved, the valve is durable in use, and the practicability is high.

7) According to the balanced all-metal hard sealing sleeve valve, the structural form and the assembly relation of the integral sealing valve core determine that a certain elastic space exists, the position can be adjusted according to the balanced flowing of upper and lower cavity media, the sealing contact surface of the integral sealing valve core is ensured, the dynamic sealing environment is always kept, and the sealing performance of the sleeve adjusting valve is improved.

8) The medium circulation of two upper and lower chambeies is made to six balanced holes to a balanced type all-metal hard seal cover cylinder valve, has guaranteed sleeve governing valve internal pressure dynamic balance, and valve usability is good, has avoided appearing revealing, the valve trouble that unbalanced force such as vibrations caused.

Drawings

Fig. 1 is the utility model discloses a balanced type all-metal hard seal cover cylinder valve structure cross-sectional view.

Fig. 2 is a partial enlarged view of a balanced all-metal hard seal sleeve valve.

In the figure: 1. upper valve body 2, lower valve body 3, valve rod 4, balance cylinder 5, valve seat 6, sleeve 7, integral sealing valve core 8, white steel sandwiched graphite winding pad 9, balance hole 10, pressure bearing concave ring 11, integral sealing ring 12, sealing surface 13, elastic guide ring 14, medium 15, medium inlet 16, medium outlet 16

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1 and 2, a balanced all-metal hard seal sleeve valve comprises an upper valve body 1, a lower valve body 2, a valve rod 3, a balance cylinder 4, a valve seat 5, a sleeve 6, an integral seal valve core 7, a white steel graphite-sandwiched winding pad 8, a balance hole 9, a pressure-bearing concave ring 10, an integral seal ring 11 and an elastic guide ring 13, wherein the upper valve body 1, the balance cylinder 4 and the lower valve body 2 are mutually matched and fixed, the valve seat 5 and the sleeve 6 are arranged at the position of a medium outlet 16 in the lower valve body 2, the integral seal valve core 7 is lengthened at the lower part, the upper part is provided with a seal structure, a matching internal thread hole is arranged in the middle of the integral seal valve core 7 and is matched and connected with the integral seal valve core 7 through the internal thread hole, the valve rod 3 and the integral seal valve core 7 are positioned through a conical surface, the conical surface is automatically positioned, the coaxiality is easier to be, the non-fixed integral sealing valve core 7 can be adjusted in real time according to the stress condition, so that the integral sealing valve core 7 is in a dynamic stress balance state, the outer wall of the integral sealing valve core 7 is in fit contact with the inner wall of the balance cylinder 4, the pressure-bearing concave ring 10, the integral sealing ring 11 and the elastic guide ring 13 belong to one part of the integral sealing valve core 7, the section of the integral sealing ring 11 is an open ring sheet with an arc shape, the outer diameter of the integral sealing ring 11 is larger than the inner diameter of the balance cylinder 4, the integral sealing ring 11 is tightly attached to the inner wall of the balance cylinder 4 after assembly, the integral sealing ring 11 expands outwards under the stress of the medium 14 pressure, the final stress is pressed to the inner wall of the balance cylinder 4, the larger the medium 14 pressure is, the larger the integral sealing ring 11 is stressed, a circle of sealing belt is formed, the formed sealing belt slides up and down along with the action of the integral sealing ring 11 to form an integral dynamic sliding seal, a circular pressure-bearing concave ring 10 is arranged at the front end of an opening of the integral sealing ring 11, the pressure-bearing concave ring 10 bears the destructive pressure of a medium 14 to the integral sealing ring 11, so that the medium 14 has a buffer at the pressure-bearing concave ring 10, meanwhile, the pressure difference of the upper section and the lower section of the integral sealing ring 11 is reduced, the integral sealing ring 11 is prevented from being damaged due to the pressure difference of the medium 14, a structural groove is arranged at the middle position of the integral sealing valve core 7, a semi-ring type elastic guide ring 13 is designed below the groove, the ring wall of the elastic guide ring 13 is in contact fit with the inner wall of the balance cylinder 4, the rigidity of the elastic guide ring 13 is larger than that of the integral sealing ring 11, the elastic guide ring 13 is not easy to, meanwhile, the integral sealing ring 11 is provided with a guiding protection function, when the integral sealing valve core 7 is stressed unevenly, the rigidity of the elastic guide ring 13 is large, the reaction force after contact is large, and the contact surface of the integral sealing ring 11 can be prevented from exceeding the limit position, so that the integral sealing ring 11 is protected, the lower end of the integral sealing valve core 7 is matched and sealed with the valve seat 5 and the sleeve 6, the conical sealing surface at the lower end of the integral sealing valve core 7 is in contact and sealed with the conical sealing surface of the valve seat 5, because the integral sealing valve core 7 is in non-fixed fit with the valve rod 3, the integral sealing valve core 7 is in a dynamic balance state, the contact surface of the integral sealing valve core 7 and the contact surface of the valve seat 5 are also in a dynamic sealing state and always kept sealed, the sealing performance of the valve is improved, six balance holes 9 are uniformly distributed on the integral sealing valve core 7, the medium 14 enters the inner, the dynamic balance state is formed by the cooperation of the integral sealing ring 11, the conical surface matching surface and the loose threads, so that the unbalanced forces of the upper cavity and the lower cavity of the medium 14 are mutually counteracted, and the whole valve is in a dynamic balance state.

As shown in fig. 1, static sealing positions of the upper valve body 1 and the balance cylinder 4, the lower valve body 2 and the valve seat 5, and the like are sealed by white steel sandwiched graphite winding pads 8, the white steel sandwiched graphite winding pads 8 are good in elasticity, strong in sealing performance and capable of performing displacement compensation.

As shown in fig. 1, the integral sealing valve core 7 and the valve seat 5 are sealed by a conical surface, the integral sealing valve core 7 and the sleeve 6 are sealed by a cylindrical surface, the conical surface is tightly sealed, and the secondary sealing is matched with the cylindrical surface, so that the valve is ensured not to leak under any condition, the valve can be turned off for a long time, and the cylindrical surface of the sleeve 6 has a matching guide function for the integral sealing valve core 7, and the coaxiality is ensured while the sealing function is realized.

As shown in figure 1, the valve rod 3 and the integral sealing valve core 7 are positioned by a conical surface, are in threaded connection and are of an unfixed structure, the coaxiality of the integral sealing valve core 7 can be automatically adjusted, and the sealing function and the balance function of the integral sealing valve core 7 are ensured.

As shown in fig. 1, the sleeve valve medium 14 is a liquid.

As shown in fig. 1, the inner cavity of the sleeve valve stem 3, the balance cylinder 4 and the integral seal valve core 7 is filled with medium 14, so that the medium 14 flowing through the balance hole 9 of the whole valve body keeps a dynamic balance state.

The utility model relates to a theory of operation of hard sealed sleeve valve of balanced type all metal is: the sleeve valve can achieve the sealing requirement without other sealing elements through the self-contained sealing function of the integral sealing valve core 7, when a medium 14 enters the valve inner cavity through the balance hole 9, the integral sealing ring 11 of the integral sealing valve core 7 plays a role in sealing, the medium 14 is sealed in the valve cavity, the pressure-bearing concave ring 10 bears most of the medium pressure to protect the sealing function of the integral sealing ring 11 for use, the pressure of the integral sealing ring 11 is enhanced along with the increase of the pressure of the medium 14, the deformation of the integral sealing ring 11 is increased, the sealing effect is better, the sealing failure caused by the overlarge pressure of the medium 14 is avoided, the integral sealing ring 11 also has a dynamic balance function while sealing, because the assembly of the integral sealing valve core 7 adopts the conical surface positioning and the non-fixed structure of threaded connection, the elastic characteristic of the integral sealing ring 11 can be matched with the increase of the upper, the position and the angle of the integral sealing valve core 7 are dynamically adjusted, the pressure difference in the valve is ensured to be zero, the integral sealing of the valve is ensured, and the valve is in a dynamic balance state.

The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[ examples ] A method for producing a compound

As shown in fig. 1 and 2, parts such as an upper valve body 1, a lower valve body 2, a valve rod 3, a balance cylinder 4, a valve seat 5, a sleeve 6, an integral sealing valve core 7 and the like are processed according to design requirements.

As shown in fig. 2, the outer diameter of the upper integral sealing ring 11 of the processed integral sealing valve core 7 is larger than the inner diameter of the balance cylinder 4, the elasticity is good, the surface of the circular groove of the pressure-bearing concave ring 10 is smooth, no stress concentration point exists, the pressure-bearing structure is damaged by excessive stability and no sharp point and the like of the integral sealing ring 11, the rigidity of the elastic guide ring 13 is larger than that of the integral sealing ring 11, the position is close to the middle position of the integral sealing valve core 7, the structural groove is arranged at the middle position of the integral sealing valve core 7, and the effective contact between the outer wall of the integral sealing valve core 7 and the inner wall of the balance.

As shown in fig. 1, install sleeve 6, base 5 and balance cylinder 4 in lower valve body 2, with valve rod 3 and the cooperation installation of integral seal case 7, install valve rod 3 and the installed part of integral seal case 7 inside lower valve body 2 again for the outer wall of integral seal case 7 contacts with 4 inner walls of balance cylinder, integral seal ring 11 compresses tightly at 4 inner walls of balance cylinder, 4 inner walls of elastic guide ring 10 laminating balance cylinder, the lower part extension sleeve wall of integral seal case 7 contacts with sleeve 6 and valve seat 5 respectively with the sealed face of circular cone and seals.

As shown in fig. 1, the upper valve cover 1 is closed and the white steel-sandwiched graphite wound gasket 8 is installed in a sealed position and fixed by bolts.

And (3) connecting a water pipe to the medium inlet 15, carrying out a hydraulic pressure test, then testing the tightness of the sleeve regulating valve, then opening the valve to test the adjustability of the sleeve regulating valve, and finally carrying out purging and sealing storage for later use.

The utility model discloses in use, simple structure, convenient to use, the application is strong, and whole sealing ring changes along with medium pressure and can be used to the poor occasion of high pressure, has reduced the structure of independent balance circle, adopts whole seal structure, and sealed be a slip sealing strip, realizes sealed more easily for high temperature environment, and is that the all-metal seals up longe-lived firmly.

Claims (6)

1. A balanced all-metal hard sealing sleeve valve comprises an upper valve body, a lower valve body, a valve rod, a balance cylinder, a valve seat, a sleeve, an integral sealing valve core, a white steel graphite winding pad, a pressure-bearing concave ring, an integral sealing ring and an elastic guide ring, wherein the upper valve body, the balance cylinder and the lower valve body are mutually matched and fixed, the valve seat and the sleeve are arranged at the position of a medium outlet in the lower valve body, the balanced all-metal hard sealing sleeve valve is characterized in that the integral sealing valve core is of a lower-part lengthened sleeve structure, the upper part of the integral sealing valve core is provided with a sealing structure, a matching internal thread hole is arranged in the middle of the integral sealing valve core, the valve rod and the integral sealing valve core are matched and connected through the internal thread hole, the outer wall of the integral sealing valve core is in matching contact with the inner wall of the balance cylinder, the pressure-bearing concave ring, the integral sealing, the assembled integral sealing ring is tightly attached to the inner wall of the balance cylinder, a circular pressure-bearing concave ring is arranged at the front end of an opening of the integral sealing ring, a structural groove is arranged at the middle position of the integral sealing valve core, a semi-ring type elastic guide ring is designed below the groove, the annular wall of the elastic guide ring is in contact fit with the inner wall of the balance cylinder, the lower end of the integral sealing valve core is in fit seal with the valve seat and the sleeve, and six balance holes are uniformly distributed on the integral sealing valve core.

2. The balanced all-metal hard seal sleeve valve of claim 1, wherein static seal locations such as the upper valve body and the balance cylinder, the lower valve body and the balance cylinder, and the lower valve body and the valve seat are sealed by white steel sandwiched graphite wound gaskets.

3. The balanced all-metal hard seal sleeve valve of claim 1, wherein the integral seal spool and valve seat seal is a conical face seal and the integral seal spool and sleeve seal is a cylindrical face seal.

4. The balanced all-metal hard seal sleeve valve of claim 1, wherein said valve stem and integral seal cartridge are conically tapered and threadably engaged.

5. The balanced all-metal hard seal sleeve valve of claim 1 wherein said sleeve valve media is a liquid.

6. The balanced all-metal hard seal sleeve valve of claim 1, wherein the inner cavities of the sleeve valve stem, the balance cylinder and the integral seal spool are filled with media.

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