CN211398640U - Large-diameter high-pressure stop valve - Google Patents
Large-diameter high-pressure stop valve Download PDFInfo
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- CN211398640U CN211398640U CN201922474176.1U CN201922474176U CN211398640U CN 211398640 U CN211398640 U CN 211398640U CN 201922474176 U CN201922474176 U CN 201922474176U CN 211398640 U CN211398640 U CN 211398640U
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Abstract
The utility model discloses a large-caliber high-pressure stop valve, which relates to the technical field of high-pressure pipeline valves and comprises a valve body, a valve seat, a large valve core, a small valve core, a valve core cover, a throttling sleeve, a valve cover, a valve rod and an actuating mechanism; the large-caliber high-pressure stop valve adopts a pilot-operated double-valve-core structure, so that the driving force required by the action of the actuating mechanism can be effectively reduced; a throttling sleeve component is arranged in the stop valve, so that the stop valve has an adjusting function; the hard alloy is welded on the sealing surface of the valve seat and the valve core in a surfacing mode, the service life of the valve can be prolonged, meanwhile, the valve seat is of a detachable structure, the sealing surface is easy to repair after being abraded, the maintenance period can be shortened, and the maintenance cost is reduced.
Description
Technical Field
The utility model relates to a high-pressure pipeline valve technical field, concretely relates to heavy-calibre high-pressure stop valve is applied to heavy-calibre high-pressure stop valve and replaces gate valve technical field.
Background
A large-diameter high-pressure gate valve for shutoff action is required to be arranged on a high-pressure water supply and steam pipeline of a power plant and a chemical industry enterprise; the sealing measure between the valve clack and the valve seat of the traditional large-caliber high-pressure gate valve is a fit plane structure, the sealing plane between the valve clack and the valve seat of the structure is easy to wear, and the valve clack and the valve seat are difficult to repair and replace after being worn, so that the large-caliber high-pressure gate valve is short in service life, long in maintenance period and high in maintenance cost.
Disclosure of Invention
The utility model aims at providing a heavy-calibre high pressure stop valve adopts the guide's formula double-valve-element structure, can reduce the required drive power of actuating mechanism action effectively, the utility model discloses the stop valve has regulatory function, long service life, and the disk seat adopts detachable structure, easily maintains the restoration, can shorten maintenance cycle, reduces cost of maintenance.
According to the technical scheme of the utility model, the large-caliber high-pressure stop valve comprises a valve body, a valve seat, a large valve core, a small valve core, a valve core cover, a throttling sleeve, a valve cover, a valve rod and an actuating mechanism; one end of the valve rod is connected with the actuating mechanism, the other end of the valve rod is connected with the small valve core, the small valve core is arranged between the large valve core and the valve core cover, the large valve core and the valve core cover are fixedly connected to form a valve core assembly, the valve core assembly is arranged in the throttling sleeve, and the throttling sleeve is fixed in the inner cavity of the valve body; the valve seat is fixed in the inner cavity of the valve body; the valve cover is connected with the valve body.
The large-caliber high-pressure stop valve adopts a pilot-operated double-valve-core structure and comprises the large valve core, the small valve core, the valve rod and the valve core cover; the valve core assembly can freely move up and down in the throttling sleeve.
The actuating mechanism is fixed above the valve cover through a bolt, a round through hole is formed in the center of the valve cover, and the valve rod penetrates through the round through hole and extends into the inner cavity of the valve body.
The big valve core is provided with a first balance hole, and the valve core cover is provided with a plurality of second balance holes.
And hard alloy is welded on the joint sealing surface of the valve seat and the big valve core in a surfacing mode, and hard alloy is welded on the joint sealing surface of the small valve core and the big valve core in a surfacing mode.
The throttling sleeve is positioned above the valve seat, and a certain distance gap is kept between the throttling sleeve and the valve seat.
The utility model has the beneficial technical effects that:
the utility model discloses a two case structures of guide's formula can reduce the required drive power of actuating mechanism action effectively, the application utility model discloses the stop valve has regulatory function, long service life, and the disk seat adopts detachable structure, and easy the restoration after the sealed face wearing and tearing can shorten maintenance cycle, reduces cost of maintenance.
Drawings
Fig. 1 is a schematic structural diagram of a large-caliber high-pressure stop valve disclosed in the present application.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
Referring to fig. 1, a large-caliber high-pressure stop valve comprises a valve body 1, a valve seat 2, a large valve core 3, a small valve core 4, a valve core cover 5, a throttling sleeve 6, a valve cover 7, a valve rod 8 and an actuating mechanism 9; the large-caliber high-pressure stop valve adopts a pilot-operated type double-valve-core structure and comprises a large valve core 3, a small valve core 4, a valve rod 8 and a valve core cover 5, wherein one end of the valve rod 8 is connected with an actuating mechanism 9, the other end of the valve rod is connected with the small valve core 4, the small valve core 4 is arranged between the large valve core 3 and the valve core cover 5, the large valve core 3 and the valve core cover 5 are fixedly connected to form a valve core assembly, and the valve core assembly is arranged in a throttling sleeve 6 and can freely move up and down in the throttling sleeve 6; the throttling sleeve 6 is fixed above the inner cavity of the valve body 1, a certain distance gap is kept between the throttling sleeve and the valve seat 2, and the valve seat 2 is fixed in the inner cavity of the valve body 1; the valve cover 7 is fixedly connected with the valve body 1 through bolts; the actuating mechanism 9 is fixed above the valve cover 7 through a bolt, a round through hole is formed in the center of the valve cover 7, and the valve rod 8 penetrates through the round through hole and extends into the inner cavity of the valve body 1.
The large valve core 3 is provided with a first balance hole 11, the valve core cover 5 is provided with a plurality of second balance holes 10, and the actuating mechanism 9 drives the valve core assembly to move up and down in the throttling sleeve 6 through the valve rod 8; when the stop valve needs to be opened, the small valve core 4 firstly moves upwards to open a small section of stroke, the first balance hole 11 is communicated with the second balance hole 10, the upper cavity and the lower cavity of the balance hole are communicated, the air pressure is balanced, the driving force required by the actuating mechanism 9 for driving the valve core assembly to act is greatly reduced, the valve core assembly can be easily and quickly lifted up, an inlet pipeline and an outlet pipeline of the valve body 1 are communicated, and meanwhile, the size of a connecting channel can be adjusted by adjusting the position of the valve core assembly in the throttling sleeve 6 according to the requirement of medium flow, so that the flow; when the stop valve needs to be closed, the actuating mechanism 9 pushes the valve core assembly to move downwards through the valve rod 8 until the large valve core 3 and the valve seat 2 are pressed and sealed, and at the moment, the connecting channel between the inlet pipeline and the outlet pipeline of the valve body 1 is cut off.
Hard alloy is welded on the joint sealing surface of the valve seat 2 and the large valve core 3, and hard alloy is welded on the joint sealing surface of the small valve core 4 and the large valve core 3, so that the wear resistance is improved, the service life of the valve can be prolonged, the valve seat 2 adopts a detachable structure, the sealing surface is easy to repair after being worn, the maintenance period can be shortened, and the maintenance cost is reduced.
The specific working principle of the large-caliber high-pressure stop valve is as follows:
the utility model discloses a heavy-calibre high pressure stop valve of this application adopts the two case structures of pilot-operated formula, and when opening the valve, actuating mechanism drives little case through the valve rod and moves upward earlier and open a segment stroke, and cavity communicates about the balancing hole this moment, and atmospheric pressure is balanced, can reduce the actuating mechanism effectively and drive the required drive power of case subassembly action, and the case subassembly can be lifted up fast easily, makes valve body inlet pipeline and outlet pipeline switch on; meanwhile, the size of the connecting channel can be adjusted by adjusting the position of the valve core assembly in the throttling sleeve 6 according to the requirement of medium flow, so that the flow regulation is realized.
The hard alloy is welded on the joint sealing surface of the valve seat and the large valve core, and the hard alloy is welded on the joint sealing surface of the small valve core and the large valve core, so that the wear resistance is improved, the service life of the stop valve can be prolonged, the valve seat is of a detachable structure, the sealing surface is easy to detach and repair after being worn, the maintenance period can be shortened, and the maintenance cost is reduced.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.
Claims (6)
1. A large-caliber high-pressure stop valve is characterized in that,
the valve comprises a valve body (1), a valve seat (2), a large valve core (3), a small valve core (4), a valve core cover (5), a throttling sleeve (6), a valve cover (7), a valve rod (8) and an actuating mechanism (9); one end of the valve rod (8) is connected with the actuating mechanism (9), the other end of the valve rod is connected with the small valve core (4), the small valve core (4) is arranged between the large valve core (3) and the valve core cover (5), the large valve core (3) and the valve core cover (5) are fixedly connected to form a valve core assembly, the valve core assembly is arranged in the throttling sleeve (6), and the throttling sleeve (6) is fixed in the inner cavity of the valve body (1); the valve seat (2) is fixed in the inner cavity of the valve body (1); the valve cover (7) is connected with the valve body (1).
2. The large-caliber high-pressure stop valve according to claim 1, characterized in that a pilot-operated double-valve-core structure is adopted, and comprises the large valve core (3), the small valve core (4), the valve rod (8) and the valve core cover (5); the valve core assembly can freely move up and down in the throttling sleeve (6).
3. A large-caliber high-pressure stop valve according to claim 1, wherein the actuator (9) is fixed above the valve cover (7) through a bolt, a round through hole is formed in the center of the valve cover (7), and the valve rod (8) penetrates through the round through hole and extends into the inner cavity of the valve body (1).
4. A large-caliber high-pressure stop valve according to claim 1, wherein the large spool (3) is designed with a first balance hole (11), and the spool cover (5) is designed with a plurality of second balance holes (10).
5. A large-caliber high-pressure stop valve according to claim 1, wherein the hard alloy is welded on the joint sealing surface of the valve seat (2) and the large valve core (3), and the hard alloy is welded on the joint sealing surface of the small valve core (4) and the large valve core (3).
6. A large bore high pressure shut-off valve according to claim 1, characterized in that the throttling sleeve (6) is located above the valve seat (2) with a distance gap from the valve seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922474176.1U CN211398640U (en) | 2019-12-31 | 2019-12-31 | Large-diameter high-pressure stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922474176.1U CN211398640U (en) | 2019-12-31 | 2019-12-31 | Large-diameter high-pressure stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211398640U true CN211398640U (en) | 2020-09-01 |
Family
ID=72209122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922474176.1U Active CN211398640U (en) | 2019-12-31 | 2019-12-31 | Large-diameter high-pressure stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211398640U (en) |
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2019
- 2019-12-31 CN CN201922474176.1U patent/CN211398640U/en active Active
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