1. The utility model provides a telescopic governing valve, its characterized in that includes valve body (1), case (2), valve rod (3) and actuating mechanism (4), be provided with disk seat (5) in valve body (1), install sleeve (6) on disk seat (5), install between disk seat (5) and sleeve (6) case (2), wear to be equipped with valve rod (3) in valve body (1), valve rod (3) run through case (2), install clamping ring (7) on case (2), be provided with balanced sealing ring (11) between case (2) and clamping ring (7), install elastic sealing ring (12) between case (2) and sleeve (6), first seal gasket (13) and second seal gasket (14) are installed respectively to the upper and lower both sides of elastic sealing ring (12).

2. The spool-type regulator valve of claim 1, wherein: the valve core (2) is provided with a first balance hole (16), a guide surface (17) and a first pressure equalizing ring groove (18), the first balance hole (16) is symmetrically arranged relative to the axis direction of the valve core (2), the lower end of the valve core (2) is provided with the guide surface (17), and the first pressure equalizing ring groove (18) is arranged outside the guide surface (17).

3. The spool-type regulator valve of claim 2, wherein: the lower end of the valve core (2) is provided with a conical sealing surface.

4. The spool-type regulator valve of claim 1, wherein: and the pressing ring (7) is uniformly provided with second balance holes (19) along the axial direction.

5. The spool-type regulator valve of claim 1, wherein: the balance sealing ring is characterized in that a third balance hole (20), a second balance ring groove (21) and a gasket groove (22) are formed in the balance sealing ring (11), the third balance hole (20) is axially arranged along the balance sealing ring (11), the second balance ring groove (21) is formed in the periphery of the balance sealing ring (11), and a fifth sealing gasket (23) is embedded into the gasket groove (22).

6. The spool-type regulator valve of claim 1, wherein: the lower end of the balance sealing ring (11) is provided with a conical sealing surface.

7. The spool-type regulator valve of claim 1, wherein: the inner periphery of the elastic sealing ring (12) is set to be a conical sealing surface, an elastic groove (15) is formed in the elastic sealing ring (12), and at least one elastic groove (15) is formed in the upper side and the lower side of the elastic sealing ring (12) respectively.

8. The spool-type regulator valve of claim 1, wherein: still the cover is equipped with retaining member (27) on case (2), retaining member (27) locking is on balanced sealing ring (11) upper portion, be provided with annular (25) and through-hole (26) on retaining member (27) for case (2) epicoele and valve back pressure balance.

9. The spool-type regulator valve of claim 1, wherein: the valve core (2) is connected with the valve rod (3) through threads, and spot welding locking is added.

10. The spool-type regulator valve of claim 1, wherein: and a third sealing gasket (8) is arranged at the lower part of the valve seat (5), and a fourth sealing gasket (9) is arranged on the upper side of the pressing ring (7).

Background

The sleeve type regulating valve is widely applied in the industrial production process, such as industries of thermal power plants, coal chemical industry, LNG liquefied natural gas and the like, plays a crucial role in a pipeline system, the valve core is an opening and closing part of the valve core, and the sleeve can be designed into various types, such as a common window type, a porous type, a labyrinth type and the like, so as to meet the requirements of various working conditions; the cross section of a flow channel can be changed in the moving process of the valve core to form accurate adjustment on a medium, the valve is a straight stroke adjusting valve which has good sealing performance, has two functions of adjustment and opening and closing, can be matched with a pneumatic or electric actuator, and is suitable for a control system requiring a large adjustable ratio. The problem that current governing valve exists:

(1) as shown in fig. 1, the pilot-operated type internal part structure can meet the working conditions of high temperature, low temperature and high pressure, but has the disadvantages of complicated structure, high processing cost, unsuitability for low-pressure working conditions, complicated unbalanced force calculation process, non-rigid connection between a valve core and a valve rod, and easy surging, which is the biggest disadvantage of the pilot-operated type structure;

(2) as shown in fig. 2, the structure is a floating plug balanced type internal member structure, the structure cannot be applied to a high-temperature working condition due to the problem of the material of the balance ring, and also, when the temperature is low, the shrinkage coefficient of the floating plug ring is far larger than that of metal due to the problem of the material of the balance ring, the size deformation is serious, the problem cannot be solved even by a special low-temperature sealing ring in the market, and the floating plug ring becomes abnormally hard at low temperature, so that the leakage requirement cannot be met, even the valve is easy to be stuck, the floating plug ring balanced type structure is only applicable to the working condition of about-29-200 ℃, even under the working condition, the floating plug ring balanced type structure is continuously rubbed with metal more, the friction force exists, the service life is not long, the internal member of the floating plug ring type structure cannot eliminate the unbalanced force, and therefore, the valve cannot eliminate the unbalanced force;

(3) as shown in fig. 3, the flexible graphite balanced type internal structure is similar to a universal plug ring structure, and the sealing material is different, but the flexible graphite is suitable for a high-temperature low-pressure-difference working condition, and is suitable for static sealing due to the structural problem of the flexible graphite, but the dynamic sealing high-pressure-difference condition is easily blown away by pressure, the leakage level difference is large, the friction force is large, and the unbalanced surface of the internal part of the flexible graphite balanced type structure cannot be eliminated, so that the unbalanced force cannot be eliminated by the valve;

(4) as shown in fig. 4, the structure of the C-shaped ring is suitable for high-low temperature and high-low pressure working conditions, and the C-shaped ring has a complex forming process and a welding problem, and the welding joint processing technology is difficult to overcome, can be used under the condition that the leakage level is not greater than iv level, has short-time sliding friction at the closing moment, is easy to have a strain problem, cannot meet the requirement under the condition of strict requirement on leakage, has a large unbalanced area, and is not beneficial to stable adjustment;

(5) as shown in fig. 5, in the conventional dual seat trim structure, due to installation problems, the outer diameters of the upper and lower valve seats must be different, which results in large unbalanced force; as shown in fig. 6, the double-seat type internal part structure has an unbalanced area slightly smaller than that of the traditional double-seat type internal part structure, but still exists and cannot be eliminated, and the two double-seat type structures have no compensation because two sealing surfaces are in rigid contact in principle, so that simultaneous sealing cannot be realized in practice, the leakage rate is tens of times or even hundreds of times greater than that of a single-seat valve, if the leakage needs to be reduced, the test and the assembly must be repeated, the working period is long, and the cost is high; even if satisfy the leakage requirement under the normal atmospheric temperature operating mode, but high temperature or low temperature can't reach sealed requirement at part expansion or shrink during the in-service use, and simultaneously, the valve body runner structure is complicated makes the processing degree of difficulty improve, and processing cost is too big, and is too heavy, therefore, it only is applicable to the not tight operating mode of leakage requirement.

Disclosure of Invention

The invention aims to provide a sleeve type regulating valve which is sealed by adopting a metal material and an elastic material at the same time, so that complete matching can be realized under the elastic compensation of the elastic material in a high-temperature and low-temperature state, no medium unbalanced force and no balance ring friction force exist in the valve regulating process, an actuator only needs to overcome the filler friction force, the fine-tuning crawling problem is eliminated, the dead zone is effectively reduced, and the regulating precision is improved.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a telescopic governing valve, includes valve body, case, valve rod and actuating mechanism, be provided with the disk seat in the valve body, install the sleeve on the disk seat, the case is installed between disk seat and sleeve, wear to be equipped with the valve rod in the valve body, the valve rod runs through the case, install the clamping ring on the case, be provided with balanced sealing ring between case and the clamping ring, install elastic sealing ring between case and the sleeve, first seal gasket and second seal gasket are installed respectively to elastic sealing ring's upper and lower both sides.

Furthermore, the valve core is provided with a first balance hole, a guide surface and a first pressure equalizing ring groove, the balance holes are symmetrically arranged in the axial direction of the valve core, the guide surface is arranged at the lower end of the valve core, and the first pressure equalizing ring groove is arranged outside the guide surface.

Furthermore, the lower end of the valve core is provided with a conical sealing surface.

Furthermore, second balance holes are uniformly formed in the pressing ring along the axial direction.

Further, be provided with third balancing hole, second pressure-equalizing ring groove and gasket groove on the balanced sealing ring, the third balancing hole sets up along balanced sealing ring axial, set up second pressure-equalizing ring groove in the periphery of balanced sealing ring, the inside gasket groove that sets up on the balanced sealing ring, the embedded fifth seal gasket that is equipped with of gasket groove.

Further, the lower end of the balance sealing ring is provided with a conical sealing surface.

Furthermore, the inner periphery of the elastic sealing ring is set to be a conical sealing surface, an elastic groove is formed in the elastic sealing ring, and at least one elastic groove is formed in the upper side and the lower side of the elastic sealing ring respectively.

Further, still the cover is equipped with the retaining member on the case, the retaining member locking is on balanced sealing ring upper portion, be provided with annular and through-hole on the retaining member for valve body internal pressure is balanced when locking.

Furthermore, the valve core and the valve rod are connected through threads, and spot welding locking is added.

Furthermore, a third sealing gasket is arranged on the lower portion of the valve seat, and a fourth sealing gasket and a fifth sealing gasket are respectively arranged on the upper side and the lower side of the pressing ring.

In conclusion, the invention has the following beneficial effects:

1. the conical sealing surface at the lower end of the valve core is matched and mounted with the valve seat to form a main seal, meanwhile, the balance sealing ring made of metal is matched and mounted with the elastic sealing ring to form a second auxiliary seal, so that the elastic sealing ring and the balance sealing ring can be tightly matched under the compensation action of the elastic sealing ring no matter in a high-temperature state or a low-temperature state, and the elastic sealing ring deforms upwards under the action of a medium to form a self-sealing effect with the balance sealing ring, so that full coverage in the high-temperature state and the low-temperature state is realized;

2. furthermore, the valve rod is connected with the valve core through threads, a thin nut is added for locking, and spot welding is added for locking to prevent loosening, so that the stable connection of the valve rod and the valve core is ensured;

3. furthermore, a locking piece is sleeved on the valve core, is provided with an internal thread, is matched and screwed with the external thread on the upper part of the valve core and is used for locking the balance sealing ring, the valve core and a fifth sealing gasket in the gasket groove; moreover, the annular groove and the through holes are uniformly arranged in the axial direction of the locking piece, so that when the locking piece is locked at any position, the through holes can be communicated with the balance sealing ring and the valve core through the annular groove, and the pressure balance between the upper cavity of the valve core and the back of the valve is realized;

4. furthermore, because the clearance between the elastic sealing ring and the valve core is small, in the valve adjusting process, the valve core at the upper part of the elastic sealing ring is only pressed by the pressure behind the valve and keeps balance without unbalanced force, and the upper end and the lower end of the valve core are also stressed and balanced with the elastic sealing ring, the balanced sealing ring, the valve seat and the like, so that medium unbalanced force is not generated in the adjusting process, the friction force of the balanced sealing ring is not generated, the actuator only needs to overcome the friction force of the filler, the fine-adjustment crawling problem is eliminated, the dead zone is effectively reduced, and the adjusting precision is improved;

5. further, the balance sealing ring made of metal and the elastic sealing ring act simultaneously, when the valve is closed, the auxiliary seal has an elastic compensation function, and the balance sealing ring and the elastic sealing ring can be better and closely matched.

Drawings

FIG. 1 is a diagram of a pilot operated internal part of the background art;

FIG. 2 is a structural diagram of a balanced internal part of a universal plug ring in the background art;

FIG. 3 is a view of a prior art construction of a flexible graphite balancing member;

FIG. 4 is a view showing the structure of a C-ring inner member in the related art;

FIG. 5 is a structural view of a conventional dual seating type trim in the background art;

FIG. 6 is a structural view of a dual seat type trim in the prior art;

FIG. 7 is a schematic view of the overall structure for embodying the regulating valve in the embodiment;

FIG. 8 is an enlarged schematic structural view of a portion A of FIG. 7 according to an exemplary embodiment;

FIG. 9 is a schematic structural view of an embodiment for embodying the elastic groove;

FIG. 10 is a schematic diagram of an embodiment for embodying the regulation of the regulator valve of FIG. 2;

FIG. 11 is a schematic structural view for embodying the locker in the embodiment;

in the figure, 1, a valve body; 2. a valve core; 3. a valve stem; 4. an actuator; 5. a valve seat; 6. a sleeve; 7. pressing a ring; 8. a third sealing gasket; 9. a fourth sealing gasket; 11. a balance seal ring; 12. an elastic sealing ring; 13. A first sealing gasket; 14. a second sealing gasket; 15. an elastic groove; 16. a first balance hole; 17. a guide surface; 18. a first pressure equalizing ring groove; 19. a second balance hole; 20. a third balance hole; 21. a second pressure equalizing ring groove; 22. a gasket groove; 23. a fifth sealing gasket; 25. a ring groove; 26. a through hole; 27. and a locking member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

Example (b):

a sleeve type regulator valve, as shown in FIGS. 7 and 8, includes a valve body 1, a valve element 2, a valve stem 3, and an actuator 4. A valve seat 5 is arranged in the valve body 1, a sleeve 6 is arranged on the valve seat 5, the valve core 2 is arranged between the valve seat 5 and the sleeve 6, and the lower end of the valve core 2 is provided with a conical sealing surface, so that the valve core 2 is better matched with the valve seat 5. Wear to be equipped with valve rod 3 in the valve body 1, valve rod 3 runs through case 2, and case 2 and valve rod 3 pass through threaded connection, and increase thin nut locking to increase spot welding locking, ensure that valve rod 3 and case 2 reliably connect. The valve core 2 is provided with a pressing ring 7, the lower part of the valve seat 5 is provided with a third sealing gasket 8, the upper side of the pressing ring 7 is provided with a fourth sealing gasket 9, and the sealing performance between the valve core 2 and the pressing ring 7 is enhanced. A balance sealing ring 11 is arranged between the valve core 2 and the pressing ring 7, and the balance sealing ring 11 is made of metal. An elastic sealing ring 12 is further installed between the valve core 2 and the sleeve 6, the elastic sealing ring 12 has an elastic compensation effect, and the balance sealing ring 11 and the elastic sealing ring 12 can be matched more closely in the valve adjusting process. Moreover, the first gasket 13 and the second gasket 14 are respectively installed on the upper side and the lower side of the elastic sealing ring 12, thereby further enhancing the sealing effect of the elastic sealing ring 12.

As shown in fig. 8 and 9, in order to improve the sealing effect of the balance sealing ring 11, the lower end of the balance sealing ring 11 is provided with a tapered sealing surface, the inner circumference of the elastic sealing ring 12 is provided with a tapered sealing surface, so that the two are more closely attached, the elastic sealing ring is provided with an elastic groove 15, and the elastic groove 15 is respectively provided at the upper side and the lower side of the elastic sealing ring 12. By the provision of the elastic groove 15, a compensation space is provided for the deformation of the elastic sealing ring 12.

As shown in fig. 8 and 10, in order to realize the stable adjustment of the valve core 2 in the valve body 1, the valve core 2 is provided with a first balance hole 16, a guide surface 17 and a first pressure equalizing ring groove 18, the two first balance holes 16 are symmetrically arranged about the axial direction of the valve core 2, the lower end of the valve core 2 is provided with the guide surface 17, the first pressure equalizing ring groove 18 is arranged outside the guide surface 17, through the arrangement of the guide surface 17, the lower part of the valve core 2 and the balance sealing ring 11 form a fixed guide structure, and the guide structure is just at the two ends of the valve core 2, no matter at which valve position, the guide structure is always unchanged, and the use stability of the regulating valve is effectively enhanced. The pressing ring 7 is provided with second balance holes 19 uniformly along the axial direction. Be provided with third balancing hole 20, second pressure-equalizing ring groove 21 and gasket groove 22 on the balanced sealing ring 11, third balancing hole 20 sets up along balanced sealing ring 11 axial, sets up second pressure-equalizing ring groove 21 in the periphery of balanced sealing ring 11, and inside set up gasket groove 22 on the balanced sealing ring 11, moreover at the embedded fifth seal gasket 23 that is equipped with of gasket groove 22. Through the arrangement of the first balance hole 16, the second balance hole 19 and the second balance hole 19, the interior of the valve body 1 is smooth, and pressure balance between the upper cavity of the valve core 2 and the back of the valve is realized. Meanwhile, the first pressure equalizing ring groove 18 and the second pressure equalizing ring groove 21 are arranged, so that the medium realizes balanced pressure regulation through the first pressure equalizing ring groove 18 and the second pressure equalizing ring groove 21, the friction force of radial movement of the valve core 2 is reduced, and the valve core 2 is prevented from being locked in the valve body 1.

As shown in fig. 8 and 11, in order to improve the connection stability between the valve core 2 and the balance sealing ring 11 sleeved on the valve core 2, a locking member 27 is further sleeved on the valve core 2, the locking member 27 is locked on the upper portion of the balance sealing ring 11, and the locking member 27 is provided with a ring groove 25 and a through hole 26, so that the pressure in the valve body 1 is balanced during locking, wherein the locking member 27 is a locking nut.

The specific implementation process comprises the following steps: according to the invention, a conical sealing surface at the lower end of the valve core 2 and the valve seat 5 form a first seal, and then the balance sealing ring 11 made of metal and the elastic sealing ring 12 form a second seal, so that the elastic sealing ring 12 can be tightly matched under the compensation action of the elastic sealing ring 12 no matter in a high-temperature state or a low-temperature state; and the first sealing gasket 13 and the second sealing gasket 14 on the upper side and the lower side of the elastic sealing ring 12, the third sealing gasket 8 is installed on the lower portion of the valve seat 5, the fourth sealing gasket 9 on the upper side of the pressing ring 7 is embedded with the fifth sealing gasket 23 in the gasket groove 22, and the combined action of the sealing gaskets enables the regulating valve to be stably regulated in high-temperature and low-temperature environments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.