CN216555370U - Pilot-operated stop valve suitable for thermal shock working condition - Google Patents
Pilot-operated stop valve suitable for thermal shock working condition Download PDFInfo
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- CN216555370U CN216555370U CN202121301690.6U CN202121301690U CN216555370U CN 216555370 U CN216555370 U CN 216555370U CN 202121301690 U CN202121301690 U CN 202121301690U CN 216555370 U CN216555370 U CN 216555370U
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- thermal shock
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Abstract
This novel stop valve that belongs to, concretely relates to pilot-operated type stop valve suitable for thermal shock operating mode. A pilot operated stop valve suitable for thermal shock working condition comprises a valve body and a valve cover positioned on the upper part of the valve body, wherein an actuating mechanism assembly is arranged on the upper part of the valve cover; a valve clack component is arranged in a cavity of the valve body; and a valve rod is further arranged in the cavity of the valve body and penetrates through the valve cover, so that the valve clack assembly is connected with the actuating mechanism assembly. This neotype effect that is showing is: for line contact between this neotype metallic sealing ring and the valve body, the clearance between big valve clack excircle and the valve body is suitably enlargied, when the medium rapid heating up, although big valve clack can expand in advance of the valve body, metallic sealing ring has certain elasticity, and the clearance between big valve clack excircle and the valve body is enough big, can offset the instantaneous inflation volume of big valve clack excircle under the thermal shock operating mode, therefore this kind of structure both can realize reducing and opens and close the moment of torsion, can smoothly open again under the thermal shock operating mode.
Description
Technical Field
This novel stop valve that belongs to, concretely relates to pilot-operated type stop valve suitable for thermal shock operating mode.
Background
The stop valve is applied to various industrial system pipelines in a large number, but the stop valve with a conventional structure has larger opening and closing torque under a high-pressure working condition, and in order to reduce the opening and closing torque, the stop valve with a pilot structure is usually adopted.
At present, the principle that the pilot-operated stop valve with a common structure reduces opening and closing torque is as follows: when the medium goes in and out from the top, the small valve clack is opened first to exhaust the pressure in the valve middle cavity, so as to realize the pressure balance between the upper end and the lower end of the large valve clack (the valve middle cavity and the valve outlet), and then the large valve clack is opened, thus reducing the opening and closing torque of the valve. In order to exhaust the pressure of the valve middle cavity as much as possible, the clearance between the excircle of the large valve clack and the valve body must be small, but when the medium is heated up rapidly, the large valve clack expands before the valve body, and at the moment, the valve is opened and is blocked.
Therefore, the existing pilot-operated stop valve can reduce the opening and closing torque, but the opening is possibly blocked under the thermal shock working condition.
SUMMERY OF THE UTILITY MODEL
The content of this novel is to prior art's shortcoming, provides a pilot-operated type stop valve suitable for thermal shock operating mode.
This is novel to realize like this: a pilot operated stop valve suitable for thermal shock working condition comprises a valve body and a valve cover positioned on the upper part of the valve body, wherein an actuating mechanism assembly is arranged on the upper part of the valve cover; a valve clack component is arranged in a cavity of the valve body; and a valve rod is further arranged in the cavity of the valve body and penetrates through the valve cover, so that the valve clack assembly is connected with the actuating mechanism assembly.
The pilot-operated stop valve suitable for thermal shock working conditions comprises a large valve clack and a small valve clack, wherein the large valve clack is arranged in a valve body, a cavity is arranged in the large valve clack, the small valve clack is arranged in the cavity and is in threaded connection with a valve rod, a valve clack cover with a limiting function is arranged at the upper ends of the large valve clack and the small valve clack, the valve rod penetrates through the valve clack cover, the valve clack cover divides the valve body into a valve middle cavity and a flow channel, and the flow channel comprises a valve inlet and a valve outlet.
The pilot operated stop valve suitable for the thermal shock working condition is characterized in that a metal sealing ring is arranged in the groove of the excircle of the large valve clack, and the metal sealing ring is used for sealing the large valve clack and the inner wall of the valve body.
The pilot-operated stop valve suitable for the thermal shock working condition is characterized in that a small valve seat hole is formed in the bottom of the large valve clack and is communicated with a flow channel and a cavity formed in the large valve clack.
The pilot operated stop valve suitable for the thermal shock working condition comprises a bracket and an actuating mechanism fixedly connected with the bracket.
The pilot operated stop valve suitable for the thermal shock working condition is characterized in that the valve rod penetrates through the support and is fixedly connected with the actuating mechanism.
The pilot-operated stop valve suitable for the thermal shock working condition is characterized in that the metal sealing ring has certain elasticity, and the gap between the excircle of the large valve clack and the valve body is large enough, so that the instantaneous expansion of the excircle of the large valve clack under the thermal shock working condition can be counteracted.
This neotype effect that is showing is: for line contact between this neotype metallic sealing ring and the valve body, the clearance between big valve clack excircle and the valve body is suitably enlargied, when the medium rapid heating up, although big valve clack can expand in advance of the valve body, metallic sealing ring has certain elasticity, and the clearance between big valve clack excircle and the valve body is enough big, can offset the instantaneous inflation volume of big valve clack excircle under the thermal shock operating mode, therefore this kind of structure both can realize reducing and opens and close the moment of torsion, can smoothly open again under the thermal shock operating mode.
Drawings
FIG. 1 is a schematic diagram of a pilot operated stop valve suitable for thermal shock conditions
In the figure: 1, a valve body; 2, a big valve clack; 3, a small valve clack; 4, a metal sealing ring; 5, a valve clack cover; 6, a valve rod; 7, a valve cover; 8, a bracket; 9 an actuating mechanism; a, valve inlet; the outlet of the valve B; c, valve middle cavity; d small valve seat hole
Detailed Description
As shown in figure 1, the pilot operated stop valve suitable for thermal shock working conditions comprises a valve body 1, a large valve clack 2, a small valve clack 3, a metal sealing ring 4, a valve clack cover 5, a valve rod 6, a valve cover 7, a support 8 and an actuating mechanism 9. Valve gap 7 is equipped with on 1 upper portion of valve body, and 7 upper portions of valve gap are connected with actuating mechanism 9 through support 8, are equipped with big valve clack 2 in the valve body 1, have set up metal seal ring 4 in big valve clack 2 excircle recess, and little valve clack 3 is located big valve clack 2, and little valve clack 3 passes through threaded connection with valve rod 6, sets up valve clack lid 5 on big valve clack 2 upper portion, and big valve clack 2 passes through threaded connection with valve clack lid 5. The bottom of the big valve clack 2 is provided with a small valve seat hole D. The metal sealing ring 4 is limited and fixed through the large valve clack 2 and the valve clack cover 5. The small valve clack 3 is limited by the large valve clack 2 and the valve clack cover 5.
The metal sealing ring 4 is in line contact with the valve body 1. The metal sealing ring 4 has certain elasticity, and the clearance between the excircle of the large valve clack 2 and the valve body 1 is large enough, so that the instantaneous expansion of the excircle of the large valve clack 2 under the thermal shock working condition can be counteracted.
Fig. 1 is a schematic diagram of an initial working state of the pilot-operated stop valve suitable for thermal shock conditions, and the following description is made with reference to fig. 1 to describe a working principle of the pilot-operated stop valve suitable for thermal shock conditions: the valve inlet A and the valve middle cavity C are filled with media, an opening signal is input to start the actuating mechanism 9, the actuating mechanism 9 drives the small valve clack 3 to move upwards through the valve rod 6, the valve outlet B, the valve middle cavity C and the small valve seat hole D are communicated, the valve middle cavity C is completely relieved, the pressures of the upper end and the lower end of the large valve clack 2 are balanced, the small valve clack 3 continues to move upwards to contact the valve clack cover 5, the small valve clack 3 drives the large valve clack 2 to move upwards together, the valve inlet A, the valve outlet B, the valve middle cavity C and the small valve seat hole D are communicated, and the small valve clack 3 and the large valve clack 2 continue to move upwards until the valve is completely opened; medium flows from the valve inlet A to the valve outlet B, a closing signal is input to start the actuating mechanism 9, and the actuating mechanism 9 drives the small valve clack 3 and the large valve clack 2 to move downwards together through the valve rod 6 until the valve is completely closed.
Claims (6)
1. The utility model provides a pilot-operated formula stop valve suitable for thermal shock operating mode which characterized in that: the valve comprises a valve body (1) and a valve cover (7) positioned on the upper part of the valve body (1), wherein an actuating mechanism component is arranged on the upper part of the valve cover (7); a valve clack component is arranged in a cavity of the valve body (1); a valve rod (6) is further arranged in the cavity of the valve body (1), and the valve rod (6) penetrates through the valve cover (7) so that the valve clack assembly is connected with the actuating mechanism assembly;
the valve clack subassembly include big valve clack (2) and little valve clack (3), big valve clack (2) set up in valve body (1), set up the cavity in big valve clack (2), set up little valve clack (3) in this cavity, little valve clack (3) pass through threaded connection with valve rod (6), valve clack lid (5) that have limit function are set up in the upper end of big valve clack (2) and little valve clack (3), valve rod (6) run through valve clack lid (5), this valve clack subassembly divide into valve well chamber (C) and runner with valve body (1), the runner includes valve import (A) and valve export (B).
2. The pilot operated stop valve adapted for thermal shock conditions of claim 1 wherein: the outer circle groove of the large valve clack (2) is internally provided with a metal sealing ring (4), and the metal sealing ring (4) is used for sealing between the large valve clack (2) and the inner wall of the valve body (1).
3. The pilot operated stop valve adapted for thermal shock conditions of claim 2 wherein: the bottom of the big valve clack (2) is provided with a small valve seat hole (D), and the small valve seat hole (D) is communicated with a flow passage and a cavity arranged in the big valve clack (2).
4. A pilot operated shut off valve adapted for thermal shock conditions as defined in claim 3 wherein: the actuating mechanism assembly comprises a support (8) and an actuating mechanism (9) fixedly connected with the support (8).
5. The pilot operated stop valve adapted for thermal shock conditions of claim 4 wherein: the valve rod (6) penetrates through the bracket (8) and is fixedly connected with the actuating mechanism (9).
6. The pilot operated stop valve adapted for thermal shock conditions of claim 5 wherein: the metal sealing ring (4) has certain elasticity, and the clearance between the excircle of the large valve clack (2) and the valve body (1) is large enough, so that the instantaneous expansion of the excircle of the large valve clack (2) under the thermal shock working condition can be counteracted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121301690.6U CN216555370U (en) | 2021-06-10 | 2021-06-10 | Pilot-operated stop valve suitable for thermal shock working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121301690.6U CN216555370U (en) | 2021-06-10 | 2021-06-10 | Pilot-operated stop valve suitable for thermal shock working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216555370U true CN216555370U (en) | 2022-05-17 |
Family
ID=81537214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121301690.6U Active CN216555370U (en) | 2021-06-10 | 2021-06-10 | Pilot-operated stop valve suitable for thermal shock working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216555370U (en) |
-
2021
- 2021-06-10 CN CN202121301690.6U patent/CN216555370U/en active Active
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