CN216895828U

CN216895828U - Balanced cage valve of two direction V type valve cores

Info

Publication number: CN216895828U
Application number: CN202220730095.2U
Authority: CN
Inventors: 王帮春; 何曾宝; 游金瑞
Original assignee: Sichuan Bolangshuwei Technology Co ltd
Current assignee: Sichuan Bolangshuwei Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-05
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a double-guide V-shaped valve element balance cage valve, relates to a balance cage regulating valve, solves the problems of complex assembly and poor sealing performance of the existing balance cage regulating valve, and has the technical scheme that: the valve seat is provided with a sleeve type balance valve core, the sleeve type balance valve core is abutted to the valve seat, the sleeve type balance valve core is connected with a valve rod, a guide mechanism is sleeved outside the valve rod and fixed on the valve body through a valve cover, and the sleeve type balance valve core slides between the valve seat and the guide mechanism; the lower part of the sleeve type balance valve core is a throttling cavity with a downward opening, the side wall of the throttling cavity is provided with a throttling opening, the upper part of the sleeve type balance valve core is a balance cavity with an upward opening, the throttling cavity is communicated with the balance cavity through a balance hole, and a matching surface which is abutted against a valve seat is arranged between the throttling cavity and the balance cavity; the assembly degree of difficulty has been reduced, avoids the assembly badly, and sealed effect is more outstanding, and is provided with dual guide structure, ensures even running.

Description

Balanced cage valve of two direction V type valve cores

Technical Field

The utility model relates to a balance cage type adjusting valve, in particular to a double-guide V-shaped valve core balance cage type valve.

Background

The cage type regulating valve is a pressure balance type regulating valve, the valve inner part adopts a sleeve-guided balance type valve core, and the valve core is mainly used for realizing the stable action of the valve core by utilizing the pressure of fluid; at present, a common balance cage type adjustment adopts a split design of a balance cylinder, a throttling sleeve and a valve core; the valve core is driven to vertically move up and down along the wall of the throttling sleeve by the action of the driving mechanism, so that the flow area of the throttling sleeve is changed, the adjustment of technological parameters such as pressure, flow and the like of a medium is realized, and most of static unbalanced force on the valve core is balanced by the balancing cylinder when the throttling sleeve is closed; however, due to the adoption of the split type design, on one hand, the assembly is complex, and on the other hand, the sealing performance is poor due to the split type structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that the existing balance cage type regulating valve is complex in assembly and poor in sealing performance, and aims to provide a double-guide V-shaped valve core balance cage type valve.

The utility model is realized by the following technical scheme:

a double-guide V-shaped valve core balance cage type valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve seat is arranged in the valve cavity, a sleeve type balance valve core is arranged on the valve seat and is abutted against the valve seat, a valve rod is connected to the sleeve type balance valve core, a guide mechanism is sleeved outside the valve rod and is fixed to the valve body through a valve cover, and the sleeve type balance valve core slides between the valve seat and the guide mechanism;

the lower part of the sleeve type balance valve core is a throttling cavity with a downward opening, the side wall of the throttling cavity is provided with a throttling opening, the upper part of the sleeve type balance valve core is a balance cavity with an upward opening, the throttling cavity is communicated with the balance cavity through a balance hole, and a matching surface which is abutted against the valve seat is arranged between the throttling cavity and the balance cavity.

Compared with the prior art, adopt telescopic balanced case, the medium flow can be adjusted in a flexible way to the throttle cavity of its lower part, the balanced cavity on its upper portion can guarantee that the medium pressure that valve core upper portion received when the valve is closed is balanced with the medium pressure that the valve core lower part received, eliminate most static unbalanced force on the case, save actuating mechanism's operating force, and simultaneously, greatly reduced the assembly degree of difficulty, need not to assemble the throttle sleeve in proper order during the use, case and balance cylinder, can avoid assembling various interference that bad appearance, and the telescopic balanced case of integral type design, need not like traditional split type design generally, install accessories such as O type circle, sealed pad between the part, the sealed effect of integral type design is more outstanding, the leakage grade is high.

Furthermore, the throttling openings are uniformly arranged along the side wall of the throttling cavity.

By adopting the technical scheme, most media flowing in from the bottom opening of the throttling cavity can flow out from the throttling openings uniformly distributed on the side wall of the throttling cavity, the throttling openings can be set to be in size and shape according to the control characteristics of the valve, and the impact force of the media in the cavity to the throttling cavity can be better buffered by the throttling openings uniformly arranged along the side wall of the throttling cavity, so that the throttling cavity is more uniformly pressurized, and the media flowing through the cavity can be subjected to flow regulation.

Furthermore, the throttle opening is the type of falling V, throttle opening is 3.

By adopting the technical scheme, the throttling opening arranged in the inverted V shape is narrow at the top and wide at the bottom, the medium flowing through the cavity can be subjected to flow regulation, most of the medium in the cavity can flow out of the throttling opening, and the medium with the suddenly changed direction in the cavity can be buffered through the throttling opening arranged in the inverted V shape, so that the working stability of the sleeve-type balance valve core is improved.

Furthermore, the opening caliber of the valve seat is matched with the outer diameter of the throttling cavity, the outer diameter of the balance cavity is larger than that of the throttling cavity, and the matching surface between the balance cavity and the throttling cavity is an inclined surface.

By adopting the technical scheme, the valve seat is matched with the throttling cavity in size, and when the sleeve type balance valve core moves up and down, the valve seat can play a role in matching and guiding the throttling cavity, so that the stable operation of the sleeve type balance valve core is ensured; the outer diameter of the balance cavity is larger than that of the throttling cavity, a matching surface with an inclination angle is formed between the balance cavity and the throttling cavity, the sleeve type balance valve core can be abutted against a valve seat in the cavity through the matching surface, namely, the downward movement limit of the sleeve type balance valve core is as follows: the matching surface is abutted against the valve seat, at the moment, the valve is closed, the medium at the bottom of the throttling cavity enters the balancing cavity at the upper part of the sleeve type balancing valve core through the balancing hole, the matching surface is further assisted to be abutted against the valve seat so as to maintain the closing of the valve, the operating force of an execution structure is saved, meanwhile, the upper part and the lower part of the sleeve type balancing valve core are balanced under the pressure, and most of unbalanced force on the sleeve type balancing valve core is reduced.

Further, the outer diameter of the lower portion of the guide mechanism is matched with the inner diameter of the balance cavity, a matching table is arranged on the side wall of the guide mechanism, a matching groove is formed in the matching table, and the matching groove is abutted to the balance cavity.

By adopting the technical scheme, the size of the lower part of the guide mechanism is matched with the size of the guide mechanism, and when the sleeve type balance valve core moves up and down, the guide mechanism can play a role in matching and guiding the balance cavity, so that the stable operation of the sleeve type balance valve core is ensured; and the lateral wall of the guide mechanism is provided with a matching platform which is propped against the top of the balance cavity, namely the sleeve type balance valve core moves upwards to the limit: the top of the balance cavity is abutted against the matching platform, the valve is fully opened at the moment, and most of the medium at the bottom of the throttling cavity flows out of the valve body through the throttling opening.

Furthermore, a stuffing box is arranged in a gap between the guide mechanism and the valve rod, and the stuffing box is fixed on the guide mechanism through a stuffing compression sleeve.

By adopting the technical scheme, the gap between the guide mechanism and the valve rod is sealed by the stuffing box, so that the medium at the bottom of the guide mechanism is prevented from overflowing to the outside, and the outside air is prevented from entering the valve.

Furthermore, the guide mechanism and the stuffing box are integrally arranged.

By adopting the technical scheme, the cost can be saved, the assembly flow can be simplified, the structural strength can be improved by the integrally arranged guide mechanism and the stuffing box, and good matching guidance performance is ensured.

Further, a bushing is arranged at the bottom of the stuffing box.

By adopting the technical scheme, the bushing arranged at the bottom of the stuffing box can play a role in matching and guiding the valve rod when the sleeve type balance valve core moves up and down, so that the stable operation of the sleeve type balance valve core is ensured.

Further, the valve seat and the valve body are integrally arranged.

By adopting the technical scheme, the valve seat does not need to be additionally installed, and is integrally formed with the valve body, so that the reliability of combination of the valve seat and the valve body is ensured.

Further, the surface of the valve seat is subjected to laser quenching or chemical plating to form a wear-resistant surface.

By adopting the technical scheme, the valve seat can be formed into different hard alloy layers by selecting surface laser quenching or chemical nickel-phosphorus plating according to material and working condition actual conditions, the hardness of the valve seat is improved, the valve seat is not easy to deform in the process of offsetting the throttling cavity, the manufacturing cost is low, and the valve seat is economical and efficient.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a sleeve type balance valve core, the lower part of which is provided with a throttling cavity with a V-shaped throttling opening, which can flexibly adjust the medium flow, and the upper part of which is provided with a balance cavity, which can ensure that the medium pressure borne by the upper part of the valve core is balanced with the medium pressure borne by the lower part of the valve core when a valve is closed, eliminate most static unbalanced force on the valve core and save the operating force of an actuating mechanism; the telescopic balanced case of integral type design, greatly reduced the assembly degree of difficulty, can avoid assembling various interference that bad appearance appears, and need not like traditional split type design generally, and the accessory such as installation O type circle, sealed pad between the part, sealed effect is more outstanding, leaks the grade height.

2. The utility model provides a double-guide balance cage type valve, wherein a valve seat is matched with a throttling cavity in size, the valve seat plays a first heavy-fit guide role when a sleeve type balance valve core moves up and down, the size of the lower part of a guide mechanism is matched with the size of the guide mechanism, the guide mechanism plays a second heavy-fit guide role when the sleeve type balance valve core moves up and down, and the stable operation of the sleeve type balance valve core is ensured by combining the matching guide effect of the guide mechanism on a valve rod.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

FIG. 1 is a schematic structural diagram according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sleeve balanced valve spool according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a guiding mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a throttle opening according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1. a valve body; 2. a valve cavity; 3. a valve seat; 4. a sleeve-type balance valve core; 5. a valve stem; 6. a guide mechanism; 7. a valve cover; 41. a throttling cavity; 42. a balance cavity; 43. a balance hole; 44. a throttle opening; 61. a matching table; 62. a mating groove; 63. a bushing; 64. a stuffing box; 65. and (5) a packing pressing sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.

Example 1

This example 1 provides a dual pilot V-spool balanced cage valve, as shown in figures 1-4,

as shown in fig. 1, including

valve body

1, 1 left side of valve body is provided with the runner import, 1 right side of valve body is provided with the runner export, be provided with valve chamber 2 in the valve body 1, valve chamber 2 and left runner import and the runner export intercommunication on right side, valve chamber 2 has the disk seat 3 with 1 integrated into one piece of valve body, be provided with telescopic balanced case 4 on the disk seat 3, valve rod 5 through threaded connection on the telescopic balanced case 4, 5 periphery covers of valve rod are equipped with guiding mechanism 6, guiding mechanism 6 is fixed in on the valve body 1 through valve gap 7.

As shown in fig. 2, the lower part of the sleeve-type balance valve core 4 is a throttling cavity 41 with a downward opening, the side wall of the throttling cavity 41 is uniformly provided with throttling openings 44, media can flow out of the throttling openings 44, the size and shape of the throttling openings can be set according to the control characteristics of the valve, specifically, as shown in fig. 4, the throttling openings can be set to be inverted V-shaped and set to be 3, and media with sharply changed directions can be buffered; the upper part of the sleeve type balance valve core 4 is a balance cavity 42, the balance cavity 42 is communicated with the throttling cavity 41 through a balance hole 43, and the balance hole 43 is uniformly arranged at the bottom of the balance cavity 42 in an annular shape; the outer diameter of the balance cavity 42 is larger than the outer diameter of the throttling cavity 41, a matching surface is arranged at a joint part between the balance cavity 42 and the throttling cavity 41, the matching surface is an inclined surface and is abutted against the valve seat 3 for limiting the lower limit of the stroke of the sleeve-type balance valve core 4, the outer diameter of the throttling cavity 41 is matched with the opening diameter of the valve seat 3 in the radial direction, and the throttling cavity 41 can slide along the valve seat 3.

The guide mechanism 6 is a hollow cylinder as shown in fig. 3, the valve rod 5 is arranged in the middle of the guide mechanism, the outer diameter of the lower part of the guide mechanism is matched with the inner diameter of the balance cavity 42, namely, the inner wall of the balance cavity 42 is attached to the outer wall of the lower part of the guide mechanism 6, so that the balance cavity 42 can slide along the radial direction of the guide mechanism 6, the side wall of the guide mechanism is also provided with a horizontally extending matching table 61, the lower part of the matching table 61 is provided with a matching groove 62, and the matching groove 62 is abutted to the upper part of the balance cavity 42 and used for limiting the upper limit of the stroke of the sleeve type balance valve core 4; a packing box 64 is arranged in a gap between the guide mechanism 6 and the valve rod 5, the packing box 64 is fixed on the guide mechanism 6 through a packing pressing sleeve 65 and used for closing a gap between the guide mechanism 6 and the valve rod 5, and a bushing 63 can be further arranged at the bottom of the packing box 64 and used for guiding the valve rod 5 in a matched mode.

In a specific embodiment, the guide mechanism 6 and the stuffing box 64 can be integrally arranged, so that the assembly process is simplified, and the structural strength is increased.

Furthermore, the surface of the valve seat 3 can also be subjected to laser quenching or chemical nickel and phosphorus plating to form a wear-resistant surface, so that the hardness of the valve seat 3 is improved.

When the valve is fully opened, the sleeve type balance valve core 4 is abutted against a matching groove on the guide mechanism 6, and a medium enters the valve cavity 2 from a flow channel inlet on the left side of the valve body 1 and flows to a flow channel outlet through a throttling opening 44 on the side wall of the throttling cavity 41; when the valve is closed, the sleeve type balance valve core 4 is abutted against the valve seat 3, and a medium enters the valve cavity 2 from the flow passage inlet on the left side of the valve body 1 and enters the balance cavity 42 through the balance hole 43, so that the medium pressure borne by the sleeve type balance valve core 4 is balanced, and the valve is kept closed.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a balanced cage valve of two direction V type valve cores, characterized by: the balance valve comprises a valve body (1), wherein a valve cavity (2) is arranged in the valve body (1), a valve seat (3) is arranged in the valve cavity (2), a sleeve type balance valve core (4) is arranged on the valve seat (3), the sleeve type balance valve core (4) is abutted to the valve seat (3), a valve rod (5) is connected to the sleeve type balance valve core (4), a guide mechanism (6) is sleeved outside the valve rod (5), the guide mechanism (6) is fixed to the valve body (1) through a valve cover (7), and the sleeve type balance valve core (4) slides between the valve seat (3) and the guide mechanism (6);

the lower portion of the sleeve type balance valve core (4) is provided with a throttling cavity (41) with a downward opening, the side wall of the throttling cavity (41) is provided with a throttling opening (44), the upper portion of the sleeve type balance valve core (4) is provided with a balance cavity (42) with an upward opening, the throttling cavity (41) is communicated with the balance cavity (42) through a balance hole (43), and a matching surface which is abutted against the valve seat (3) is arranged between the throttling cavity (41) and the balance cavity (42).

2. A double guide V-spool balanced cage valve according to claim 1 wherein: the throttling openings (44) are uniformly arranged along the side wall of the throttling cavity (41).

3. A double guide V-spool balanced cage valve according to claim 2 wherein: the throttling openings (44) are of an inverted V shape, and the number of the throttling openings (44) is 3.

4. A double guide V-spool balanced cage valve according to claim 1 wherein: the opening caliber of the valve seat (3) is matched with the outer diameter of the throttling cavity (41), the outer diameter of the balance cavity (42) is larger than the outer diameter of the throttling cavity (41), and the matching surface between the balance cavity (42) and the throttling cavity (41) is an inclined surface.

5. A double guide V-shaped valve core balanced cage valve according to claim 4 wherein: the outer diameter of the lower portion of the guide mechanism (6) is matched with the inner diameter of the balance cavity (42), a matching table (61) is arranged on the side wall of the guide mechanism (6), a matching groove (62) is formed in the matching table (61), and the matching groove (62) is abutted to the balance cavity (42).

6. A double guide V-spool balanced cage valve according to claim 1 wherein: a stuffing box (64) is arranged in a gap between the guide mechanism (6) and the valve rod (5), and the stuffing box (64) is fixed on the guide mechanism (6) through a stuffing pressing sleeve (65).

7. A double guide V-spool balanced cage valve according to claim 6 wherein: the guide mechanism (6) and the stuffing box (64) are integrally arranged.

8. A double guide V-spool balanced cage valve according to claim 6 wherein: and a bushing (63) is arranged at the bottom of the stuffing box (64).

9. A double guide V-spool balanced cage valve according to claim 1 wherein: the valve seat (3) and the valve body (1) are integrally arranged.

10. A double guide V-spool balanced cage valve according to claim 1 wherein: the surface of the valve seat (3) forms a wear-resistant surface through a laser quenching or chemical plating process.