CN214466175U - Large-caliber pressure reducing valve - Google Patents
Large-caliber pressure reducing valve Download PDFInfo
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- CN214466175U CN214466175U CN202120322636.3U CN202120322636U CN214466175U CN 214466175 U CN214466175 U CN 214466175U CN 202120322636 U CN202120322636 U CN 202120322636U CN 214466175 U CN214466175 U CN 214466175U
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- clack
- valve clack
- sleeve
- pressure reducing
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Abstract
The utility model discloses a large-diameter pressure reducing valve, which relates to the valve field, and comprises a valve body and the like, wherein the valve body is fixedly arranged at the lower part of a valve cover, a driving actuating mechanism is fixedly arranged on the valve cover and is used for connecting a movable valve rod, and the valve rod penetrates through the valve cover and extends into a sleeve arranged in the valve body; the sleeve is internally provided with a valve clack, the top end of the valve clack is fixedly provided with a pressing plate, the valve rod penetrates through the pressing plate and is fixedly connected with the valve clack, and the valve clack is driven to move up and down along the inner wall of the sleeve; and a plurality of annular grooves are formed in the outer circumference of the valve clack and used for placing the guide ring and the sealing ring, the guide ring is positioned at the top of the valve clack and is in contact fit with the pressing plate, and the valve clack is tightly fit with the inner wall of the sleeve through the pretightening force generated by the pressing plate on the guide ring and the sealing ring, so that sealing and guiding are realized. The utility model discloses on the basis of traditional relief pressure valve, structural design, performance, noise reduction, parameter variation etc. all have had great innovation and technological perfection, satisfy the requirement of the large-traffic harsh operating mode of user.
Description
Technical Field
The utility model relates to a field of valve, concretely relates to heavy-calibre relief pressure valve.
Background
With the rapid development of the cogeneration industry, the stability requirements of steam users inside or downstream of power plants on the steam use pressure are higher and higher. The large-caliber reducing valve is used for reliably regulating and reducing the pressure of steam with higher pressure of large-flow steam coming from upstream so as to achieve the required pressure of downstream equipment. The steam generator has the functions of reducing steam pressure, automatically controlling and adjusting and the like, is widely applied to industries such as power plants, petrifaction and papermaking, and is suitable for the ranges of steam flow more than or equal to 220t/h, working temperature 485 ℃ and working pressure 2.5 MPa. The traditional large-caliber reducing valve is difficult to control the aspects of leakage amount, large pressure change, large flow change range and the like, can not meet the requirement of large flow variable working conditions, and directly influences the use and safety of equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, and provide a heavy-calibre relief pressure valve body adopt height to advance low, the flat casting structure that advances to go out, the runner is smooth and easy. The pressure reduction adopts a cage type structure, and the pressure reduction performance is reliable. The valve clack adopts the balanced design, reduces the unbalanced force of medium to the valve clack. The sealing adopts single-seat conical surface sealing, and the sealing performance is improved.
The purpose of the utility model is accomplished through following technical scheme: the large-caliber reducing valve comprises a valve body, a valve clack, a valve cover, a driving execution mechanism and a valve rod, wherein the valve body is fixedly arranged at the lower part of the valve cover; the sleeve is internally provided with a valve clack, the top end of the valve clack is fixedly provided with a pressing plate, and the valve rod penetrates through the pressing plate and is fixedly connected with the valve clack and used for driving the valve clack to move up and down along the inner wall of the sleeve; and a plurality of annular grooves are formed in the outer circumference of the valve clack and used for placing the guide ring and the sealing ring, the guide ring is positioned at the top of the valve clack and is in contact fit with the pressing plate, and the valve clack is tightly fit with the inner wall of the sleeve through the pretightening force generated by the pressing plate on the guide ring and the sealing ring, so that sealing and guiding are realized.
As a further technical scheme, the valve body adopts a streamline structure, and the diameters of an inlet and an outlet of the valve body are more than or equal to 600 mm.
As a further technical scheme, the valve clack adopts a horn-shaped structure with a narrow upper part and a wide lower part, a balance hole is formed in the valve clack, a valve clack upper cavity is formed between the upper part of the pressing plate and the inner wall of the sleeve, a valve clack lower cavity is formed at the lower part of the valve clack, and the valve clack upper cavity and the valve clack lower cavity are communicated through the balance hole to balance air pressure between the valve clack upper cavity and the valve clack lower cavity.
As a further technical scheme, a plurality of small through holes are uniformly formed in the throttling surface at the lower part of the sleeve along the length direction of the sleeve and are used for linearly adjusting steam pressure.
As a further technical scheme, the sealing surface of the sleeve and the valve clack is conical surface sealing, and STL cobalt-based hard alloy is welded on the sealing surface.
As a further technical scheme, the guide ring is made of antimony-added hard graphite and is used for reducing friction of relative movement between the valve clack and the sleeve and playing a role in vibration reduction.
As a further technical scheme, the driving actuating mechanism adopts electric or pneumatic power to adjust the working stroke.
As a further technical scheme, an anti-rotation frame is arranged between the valve rod and the driving execution mechanism, and the valve clack is guaranteed not to rotate relatively in the working process.
As a further technical scheme, the sealing ring is made of tetrafluoroethylene carbon fiber materials.
The utility model has the advantages that: on the basis of the traditional pressure reducing valve, the technical design of a novel structure is carried out, great innovation and technical perfection are realized in the aspects of structural design, service performance, noise reduction, parameter change and the like, and the requirement of a user on a high-flow harsh working condition is met.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of a partial region of fig. 1.
Description of reference numerals: the valve comprises a valve body 1, a valve clack 2, a sleeve 3, a guide ring 4, a valve cover 5, a filler 6, a driving execution mechanism 7, an anti-rotation frame 8, a pressure plate 9, a valve rod 10, a balance hole 11, a sealing ring 12 and a small through hole 13.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
example (b): as shown in fig. 1 and 2, the large-caliber pressure reducing valve comprises a valve body 1, a valve clack 2, a valve cover 5, a driving actuator 7 and a valve rod 10, wherein the valve body 1 adopting a streamline structure (preferably, the diameter of an inlet and an outlet of the valve body 1 is 600mm) is fixedly arranged at the lower part of the valve cover 5, the driving actuator 7 is fixedly arranged on the valve cover 5, the driving actuator 7 is used for connecting the movable valve rod 10, the valve rod 10 penetrates through the valve cover 5 and extends into a sleeve 3 arranged in the valve body 1, and a filler 6 is filled in the valve cover 5 and is used for being matched with the valve rod 10 for contact sealing; a valve clack 2 is further arranged in the sleeve 3, a pressure plate 9 is fixedly arranged at the top end of the valve clack 2, an upper cavity of the valve clack 2 is formed between the upper part of the pressure plate 9 and the inner wall of the sleeve 3, and a lower cavity of the valve clack 2 is formed at the lower part of the valve clack 2; the valve rod 10 penetrates through the pressure plate 9 and is fixedly connected with the valve clack 2 and used for driving the valve clack 2 to move up and down along the inner wall of the sleeve 3; a plurality of annular grooves are formed in the outer circumference of the valve clack 2 and used for placing the guide ring 4 and the sealing ring 12, the guide ring 4 is located at the top of the valve clack 2 and is in contact fit with the pressing plate 9, and the valve clack 2 is tightly fit with the inner wall of the sleeve 3 through pretightening force generated by the pressing plate 9 on the guide ring 4 and the sealing ring 12, so that sealing and guiding are achieved.
Referring to the attached drawing 2, the valve clack 2 adopts a horn-shaped structure with a narrow upper part and a wide lower part, two balance holes 11 are formed in the valve clack 2, the balance holes 11 communicate the upper cavity of the valve clack 2 with the lower cavity of the valve clack 2 to balance air pressure between the upper cavity and the lower cavity of the valve clack 2, the upper cavity of the valve clack 2 is guaranteed not to be pressed by pressure, the opening operating force of the valve is greatly reduced, and therefore the driving force of the driving actuating mechanism 7 is reduced.
Preferably, a plurality of small through holes 13 are uniformly formed in the throttling surface at the lower part of the sleeve 3 along the length direction of the sleeve 3 and used for linearly adjusting the steam pressure, namely, the number of the opened small through holes 13 is changed along with the movement stroke of the valve rod 10.
Preferably, the sealing surface of the sleeve 3 and the valve clack 2 is conical surface sealing, and STL cobalt-based hard alloy is welded on the sealing surface, so that the high-temperature sealing performance is met, and the flushing resistance of the valve is improved. The guide ring 4 is made of antimony-added hard graphite and is used for reducing the friction of relative movement between the valve clack 2 and the sleeve 3 and playing a role in vibration reduction. The driving executing mechanism 7 adopts electric or pneumatic power to adjust the working stroke. The anti-rotation frame 8 is arranged between the valve rod 10 and the driving execution mechanism 7, so that the valve clack 2 does not rotate relatively in the working process, and the use reliability is ensured. The sealing ring 12 is made of tetrafluoroethylene carbon fiber materials, and can effectively prevent a medium from entering the upper cavity of the valve clack 2 through a gap between the valve clack 2 and the sleeve 3.
The utility model is suitable for a large-traffic steam pressure reduction system guarantees the required stable steam pressure parameter of pipeline equipment behind the valve, adopts electronic or pneumatic drive actuating mechanism to carry out the working stroke and adjusts. When the steam passes through the small through hole on the valve inner sleeve, the flow area is rapidly reduced, resistance is generated, the specific volume of the steam is changed, and therefore the steam pressure is reduced. The adjustment of different pressures can be achieved by driving the actuator to change the stroke.
It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.
Claims (9)
1. A large-caliber pressure reducing valve is characterized in that: the valve comprises a valve body (1), a valve clack (2), a valve cover (5), a driving execution mechanism (7) and a valve rod (10), wherein the valve body (1) is fixedly arranged at the lower part of the valve cover (5), the driving execution mechanism (7) is fixedly arranged on the valve cover (5), the driving execution mechanism (7) is used for connecting the driving valve rod (10), the valve rod (10) penetrates through the valve cover (5) and extends into a sleeve (3) arranged in the valve body (1), and a filler (6) is filled in the valve cover (5) and is used for being matched with the valve rod (10) to be in contact sealing; the valve clack (2) is further arranged in the sleeve (3), a pressing plate (9) is fixedly arranged at the top end of the valve clack (2), and a valve rod (10) penetrates through the pressing plate (9) and is fixedly connected with the valve clack (2) and used for driving the valve clack (2) to move up and down along the inner wall of the sleeve (3); a plurality of annular grooves are formed in the outer circumference of the valve clack (2) and used for placing the guide ring (4) and the sealing ring (12), the guide ring (4) is located at the top of the valve clack (2) and is in contact fit with the pressing plate (9), and the valve clack (2) is tightly fit with the inner wall of the sleeve (3) through pretightening force generated by the pressing plate (9) on the guide ring (4) and the sealing ring (12), so that sealing and guiding are achieved.
2. The large bore pressure reducing valve of claim 1, wherein: the valve body (1) adopts a streamline structure, and the diameters of an inlet and an outlet of the valve body (1) are more than or equal to 600 mm.
3. The large bore pressure reducing valve of claim 1, wherein: valve clack (2) adopt narrow wide horn shape structure down, have seted up balancing hole (11) on valve clack (2), form valve clack (2) epicoele between clamp plate (9) top and sleeve (3) inner wall, valve clack (2) lower part forms valve clack (2) cavity of resorption, and balancing hole (11) are with valve clack (2) epicoele and valve clack (2) cavity of resorption intercommunication to the atmospheric pressure between the balanced two.
4. The large bore pressure reducing valve of claim 1, wherein: and a plurality of small through holes (13) are uniformly formed in the throttling surface at the lower part of the sleeve (3) along the length direction of the sleeve (3) and are used for linearly adjusting the steam pressure.
5. The large bore pressure reducing valve of claim 1, wherein: the sealing surface of the sleeve (3) and the valve clack (2) is conical surface sealing, and STL cobalt-based hard alloy is welded on the sealing surface.
6. The large bore pressure reducing valve of claim 1, wherein: the guide ring (4) is made of hard graphite added with antimony.
7. The large bore pressure reducing valve of claim 1, wherein: the driving actuating mechanism (7) adopts electric or pneumatic operation to adjust the working stroke.
8. The large bore pressure reducing valve of claim 1, wherein: an anti-rotation frame (8) is arranged between the valve rod (10) and the driving execution mechanism (7), and the valve clack (2) is ensured not to rotate relatively in the working process.
9. The large bore pressure reducing valve of claim 1, wherein: the sealing ring (12) is made of tetrafluoroethylene carbon fiber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120322636.3U CN214466175U (en) | 2021-02-04 | 2021-02-04 | Large-caliber pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120322636.3U CN214466175U (en) | 2021-02-04 | 2021-02-04 | Large-caliber pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214466175U true CN214466175U (en) | 2021-10-22 |
Family
ID=78137560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120322636.3U Active CN214466175U (en) | 2021-02-04 | 2021-02-04 | Large-caliber pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214466175U (en) |
-
2021
- 2021-02-04 CN CN202120322636.3U patent/CN214466175U/en active Active
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