CN219139850U

CN219139850U - High-pressure-difference-resistant micro-flow regulating valve

Info

Publication number: CN219139850U
Application number: CN202320054144.XU
Authority: CN
Inventors: 吴延昭; 石微宁; 顾斌
Original assignee: Tianjin Jingwei Control Technology Co ltd
Current assignee: Tianjin Jingwei Control Technology Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-06-06
Anticipated expiration: 2033-01-09

Abstract

The utility model provides a high-pressure-difference-resistant micro-flow regulating valve which is characterized by comprising a valve body, a valve seat valve cage sealing gasket, a soft valve seat sealing assembly, a valve core, a valve cover sealing gasket, a valve cover, a valve rod guide piece, a V-shaped ring packing sleeve, a fastening nut and a packing gland nut, wherein the valve seat valve cage sealing gasket is arranged at the bottom of the inner side of the valve body, and the valve seat valve cage sealing gasket is connected with the soft valve seat sealing assembly; the needle valve core and the valve seat are adopted for guiding, so that the scouring of high pressure difference to the valve internal parts is effectively resisted, and the appearance is small; the ring surrounds the valve core, helps to eliminate the gap flow held by the relatively long-gap butt-joint metal-to-metal microvalve trim, and fluid flows through the valve core and along with the movement of the valve core over the ring, flows in a flow path that is V-notched, thereby providing predictable control over the entire range of travel.

Description

High-pressure-difference-resistant micro-flow regulating valve

Technical Field

The utility model relates to the technical field of regulating valves, in particular to a high-pressure-difference-resistant micro-flow regulating valve.

Background

With the rapid development of industry, the application of high pressure difference and small flow working conditions in industrial production devices such as petroleum, chemical industry, metallurgy, electric power and the like is becoming popular, and the effectiveness and reliability of a medium control execution element, namely a regulating valve, are particularly important from the viewpoint of safe production.

The high pressure difference and small flow valve is easy to cause cavitation and vibration, and the main failure mode is as follows: valve rod fracture, valve internals scour, sealing surface failure, junction drop, and then lead to the governing valve unable control or failure.

Disclosure of Invention

According to the technical problem, the utility model provides the high-pressure-difference-resistant micro flow regulating valve with high sealing performance.

The utility model provides a high-pressure-difference-resistant micro-flow regulating valve which is characterized by comprising a valve body, a valve seat valve cage sealing gasket, a soft valve seat sealing assembly, a valve core, a valve cover sealing gasket, a valve cover, a valve rod guide piece, a V-shaped ring packing sleeve, a fastening nut and a packing gland nut, wherein the valve seat valve cage sealing gasket is arranged at the bottom of the inner side of the valve body, the valve seat valve cage sealing gasket is connected with the soft valve seat sealing assembly, the valve core is arranged in the soft valve seat sealing assembly, the valve cover sealing gasket is arranged at the upper side of the top of the valve body, the valve cover sealing gasket is connected with the valve cover, the valve rod guide piece is arranged in the middle of the inner side of the valve cover, the V-shaped ring packing sleeve is arranged at the upper side of the inner side of the valve cover, the outer side of the top of the valve cover is connected with the fastening nut, and the inner side of the top of the valve cover is connected with the packing gland nut.

The utility model provides a high-pressure-difference-resistant micro-flow regulating valve which is characterized by further comprising a valve rod adapter, a valve body bolt, a valve rod adapter nut, a hexagonal nut, an integrated valve seat and a travel indicator, wherein the valve rod adapter nut is connected with a packing gland nut, the valve rod adapter nut is connected with the valve rod adapter, the outer side of the valve rod adapter is connected with the travel indicator, the valve body bolt is connected with the hexagonal nut, the valve body bolt and the hexagonal nut are connected with a valve body and a valve cover, and the integrated valve seat is arranged in the valve body.

The soft valve seat sealing assembly comprises a valve cage, a ring, a clamping ring, a fixing ring and a spring, wherein the inner side of the valve cage is connected with the ring, the ring is connected with the clamping ring, the clamping ring is connected with the spring, and the spring is connected with the fixing ring.

The valve core penetrates through the middle parts of the inner sides of the valve body and the valve cover, and a V-shaped notch groove is formed in the bottom of the valve core.

The beneficial effects of the utility model are as follows: the utility model relates to a high pressure difference resistant micro flow regulating valve, which adopts a needle valve core and a valve seat for guiding, so that the high pressure difference resistant micro flow regulating valve can effectively resist scouring brought by high pressure difference to valve internal parts, and has a small appearance; the ring surrounds the valve core, so that clearance flow held by a butt-joint metal-to-metal miniature valve inner part with a longer clearance is eliminated, fluid flows through the valve core and flows through a flow channel of a V-shaped notch along with the movement of the valve core above the ring, the whole stroke range is predictably controlled, and VI switching off can be realized when the V-shaped notch moves below the ring; the dynamically loaded metal sealing snap ring tightly fixes the ring, the valve core is against the metal snap ring, the IV level secondary shutoff is realized, and the hydraulic seal is formed in the completely fixed ring. Thus, the greater the process pressure, the tighter the shut down.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model at different cross-sectional lines;

FIG. 3 is a schematic cross-sectional view of a soft valve seat seal assembly of the present utility model.

Reference numerals: 1. a valve body; 2. a valve seat cage gasket; 3. a soft valve seat seal assembly; 4. a valve core; 5. a valve cover gasket; 6. a valve cover; 7. a hexagonal nut; 8. a spool guide; v-ring packing kit; 10. a fastening nut; 11. a gland nut; 26. a valve stem adapter; 28. a valve body bolt; 31. a valve stem adapter nut; 32. an integral valve seat; 35. a travel indicator; 3A, a valve cage; 3B, ring; 3C, clamping rings; 3D, fixing the ring; 3E, springs; v-notch groove.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described in the following with reference to the accompanying drawings.

The utility model provides a high-pressure-difference-resistant micro-flow regulating valve which is characterized by comprising a valve body 1, a valve seat cage sealing gasket 2, a soft valve seat sealing assembly 3, a valve core 4, a valve cover sealing gasket 5, a valve cover 6, a valve rod guide 8, a V-shaped ring packing sleeve 9, a fastening nut 10 and a packing gland nut 11, wherein the valve seat cage sealing gasket 2 is arranged at the bottom of the inner side of the valve body 1, the valve seat cage sealing gasket 2 is connected with the soft valve seat sealing assembly 3, the valve core 4 is arranged in the soft valve seat sealing assembly 3, the valve cover sealing gasket 5 is arranged at the upper side of the top of the valve body 1, the valve cover sealing gasket 5 is connected with the valve cover 6, the valve rod guide 8 is arranged in the middle of the inner side of the valve cover 6, the upper side of the inner side of the valve cover 6 is provided with the V-shaped ring packing sleeve 9, the outer side of the top of the valve cover 6 is connected with the fastening nut 10, and the inner side of the top of the valve cover 6 is connected with the packing gland nut 11.

The utility model provides a high-pressure-difference-resistant micro-flow regulating valve which is characterized by further comprising a valve rod adapter 26, a valve body bolt 28, a hexagon nut 7, a valve rod adapter nut 31, an integrated valve seat 32 and a stroke indicator 35, wherein the valve rod adapter nut 31 is connected with a packing gland nut 11, the valve rod adapter nut 31 is connected with the valve rod adapter 26, the outer side of the valve rod adapter 26 is connected with the stroke indicator 35, the valve body bolt 28 is connected with the hexagon nut 7, the valve body bolt 28 and the hexagon nut 7 are connected with a valve body 1 and a valve cover 6, and the integrated valve seat 32 is arranged in the valve body 1.

The soft valve seat sealing assembly 3 comprises a valve cage 3A, a ring 3B, a clamping ring 3C, a fixed ring 3D and a spring 3E, wherein the inner side of the valve cage 3A is connected with the ring 3B, the ring 3B is connected with the clamping ring 3C, the clamping ring 3C is connected with the spring 3E, and the spring 3E is connected with the fixed ring 3D.

The valve core 4 penetrates through the middle parts of the inner sides of the valve body 1 and the valve cover 6, and a V-shaped notch groove 3F is formed in the bottom of the valve core 4.

Examples

The utility model is specially designed for severe low-flow high-pressure control application, is commonly used in laboratories and test factories, adopts a needle valve core and a valve seat for guiding, effectively resists scouring of valve internals caused by high pressure difference, and has small appearance.

The ring 3B surrounds the valve core 4 and helps to eliminate the gap flow held by the longer gap butt metal-to-metal microvalve trim. Fluid flows through the valve core 4 and flows through a flow passage with a V-shaped notch along with the movement of the valve core 4 above the ring 3B, so that the whole travel range is predictably and accurately controlled, and VI switching-off can be realized when the V-shaped notch moves below the ring 3B.

The dynamically loaded metal sealing snap ring 3C tightly fixes the ring 3B, the valve core 4 is abutted against the metal snap ring 3C, IV-level secondary shutoff is realized, in addition, the fluid process pressure and the sealing force of the actuating mechanism are combined, and thus, the hydraulic seal is formed in the completely fixed ring 3B. Thus, the greater the process pressure, the tighter the shut down.

The utility model can bear 20.7Mpa pressure, realize the adjustment of micro flow rate 0.00013, bring about a solution under the severe working conditions of ultra-high pressure difference and micro flow rate, and has application in some severe working conditions, thereby solving the problems of valve core vibration, valve rod fracture, sealing surface scouring and high noise easily caused by flash evaporation and cavitation of an on-site regulating valve.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. Various components mentioned in the present utility model are common in the art, and it should be understood by those skilled in the art that the present utility model is not limited by the above embodiments, and the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications can be made in the present utility model without departing from the spirit and scope of the utility model, which is defined in the claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a small flow control valve of high pressure differential resistance, its characterized in that includes valve body, disk seat valve cage sealing gasket, soft disk seat sealing subassembly, case, valve gap sealing gasket, valve gap, valve rod guide, V type ring packing external member, fastening nut and gland nut, the inboard bottom of valve body sets up disk seat valve cage sealing gasket, disk seat valve cage sealing gasket and soft disk seat sealing subassembly are connected, the inside case that sets up of soft disk seat sealing subassembly, valve body top upside sets up the valve gap sealing gasket, valve gap sealing gasket and valve gap connection, the inboard middle part of valve gap sets up the valve rod guide, the inside upside of valve gap sets up V type ring packing external member, the valve gap top outside is connected with fastening nut, the valve gap top inboard is connected with gland nut.

2. The high pressure differential resistant micro flow regulating valve according to claim 1, further comprising a valve stem adapter, a valve body bolt, a valve stem adapter nut, a hexagonal nut, an integrated valve seat and a travel indicator, wherein the valve stem adapter nut is connected with the packing gland nut, the valve stem adapter nut is connected with the valve stem adapter, the outer side of the valve stem adapter is connected with the travel indicator, the valve body bolt is connected with the hexagonal nut, the valve body bolt and the hexagonal nut are connected with the valve body and the valve cover, and the integrated valve seat is arranged inside the valve body.

3. The high pressure differential resistant micro flow regulating valve as set forth in claim 1, wherein said soft valve seat seal assembly comprises a cage, a ring, a snap ring, a retaining ring and a spring, said cage inner side being connected to said ring, said ring being connected to said snap ring, said snap ring being connected to said spring, said spring being connected to said retaining ring.

4. The micro flow regulating valve with high pressure difference resistance according to claim 1, wherein the valve core penetrates through the valve body and the middle part of the inner side of the valve cover, and a V-shaped notch groove is formed in the bottom of the valve core.