CN216618686U - Self-operated differential pressure regulating valve of 1200MW sealing oil system - Google Patents
Self-operated differential pressure regulating valve of 1200MW sealing oil system Download PDFInfo
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- CN216618686U CN216618686U CN202123290308.9U CN202123290308U CN216618686U CN 216618686 U CN216618686 U CN 216618686U CN 202123290308 U CN202123290308 U CN 202123290308U CN 216618686 U CN216618686 U CN 216618686U
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Abstract
The utility model relates to the field of valves, in particular to a self-operated differential pressure regulating valve of a 1200MW sealing oil system, which comprises a valve body, a valve seat arranged in the valve body, a valve cover and a gland, wherein the valve cover and the gland are arranged at the top of the valve body; the valve is characterized by also comprising an actuating mechanism arranged on the top plate, a guide sleeve arranged at the top of the valve body and connected with the valve cover, a corrugated pipe arranged on the guide sleeve, a valve rod arranged on the valve cover and fixedly connected with the actuating mechanism, a valve core arranged on the valve rod and connected with the corrugated pipe, an adjusting component arranged on the outer side of the valve cover and an anti-rotation component arranged on the valve core and the guide sleeve; the anti-rotation component comprises an anti-rotation groove arranged on the valve core, an anti-rotation hole arranged on the guide sleeve and an anti-rotation pin arranged in the anti-rotation hole; according to the utility model, through the arrangement of the corrugated pipe and the pressure guide hole, the stress condition of the valve core is not influenced by the pressure before and after the valve, so that the adjusting precision is improved.
Description
Technical Field
The utility model relates to the field of valves, in particular to a self-operated differential pressure regulating valve of a 1200MW sealing oil system.
Background
The self-operated differential pressure regulating valve does not need external energy, utilizes the self energy of a regulated medium as a power source, introduces an actuating mechanism to control a valve core to change the flow area, is essential key equipment in a double-path sealing oil system of a clear and cold generator, and has the problem that the valve core of the self-operated differential pressure regulating valve in the prior art is seriously influenced by the pressure change before and after the valve and the return difference of the valve rod due to the filler filled between the valve rod and a valve cover, so that the regulating precision is not high enough; in addition, the existing actuating mechanism only has one diaphragm, and when the pressure of chambers at two sides of the diaphragm suddenly changes, the direction of the diaphragm suddenly changes, so that the diaphragm is damaged, and the problem of medium leakage is caused. Therefore, the utility model provides a self-operated differential pressure regulating valve of a 1200MW sealing oil system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the self-operated differential pressure regulating valve is insufficient in regulating precision, and a diaphragm is easy to damage to cause medium leakage.
In order to achieve the purpose, the utility model provides a self-operated differential pressure regulating valve of a MW sealing oil system, which comprises a valve body, a valve seat arranged in the valve body, a valve cover and a gland, wherein the valve cover and the gland are arranged at the top of the valve body; the valve is characterized by further comprising an actuating mechanism arranged on the top plate, a guide sleeve arranged at the top of the valve body and connected with the valve cover, a corrugated pipe arranged on the guide sleeve, a valve rod arranged on the valve cover and fixedly connected with the actuating mechanism, a valve core arranged on the valve rod and connected with the corrugated pipe, an adjusting assembly arranged on the outer side of the valve cover and an anti-rotation assembly arranged on the valve core and the guide sleeve; the anti-rotation component comprises an anti-rotation groove arranged on the valve core, an anti-rotation hole arranged on the guide sleeve and an anti-rotation pin arranged in the anti-rotation hole.
Further preferably, the adjusting assembly comprises a pressure adjusting disc installed on the valve cover, a spring seat installed on the valve rod, and an inner ring spring and an outer ring spring installed on the pressure adjusting disc and connected with the spring seat.
Further preferably, the inner ring spring and the outer ring spring are opposite in rotation direction.
Preferably, the valve cover is provided with a balance cavity; the corrugated pipe arranged on the guide sleeve is positioned in the balance cavity; and a nut connected with the corrugated pipe is arranged on the valve core connected with the corrugated pipe and arranged on the valve rod.
Preferably, the valve core is provided with a pressure guiding hole communicated with the balance cavity, and the guide sleeve is also provided with a pressure guiding hole.
Preferably, the valve cover is provided with a sealing hole, and a gasket and a sealing pressing sleeve are arranged in the sealing hole; the sealing pressing sleeve is provided with a sealing ring; and the top of the valve cover is provided with a pressing plate connected with the sealing pressing sleeve.
Further preferably, the actuating mechanism comprises a lower membrane cover arranged on the top plate, a middle membrane cover arranged on the lower membrane cover, an upper membrane cover arranged on the middle membrane cover, a tray and a pressure plate arranged on the valve rod, and rolling membranes respectively arranged at the top and the bottom of the middle membrane cover and connected with the upper membrane cover and the lower membrane cover.
The utility model has the beneficial effects that: through the arrangement of the corrugated pipe and the pressure guide hole, the pressure before the valve and the pressure after the valve, which are applied to the valve core, are guided to respectively act on the outer surface and the inner surface of the corrugated pipe for balancing, so that the stress condition of the valve core is not influenced by the pressure before the valve and the pressure after the valve, and the adjusting precision is improved;
by arranging the sealing pressing sleeve, the packing seal originally arranged on the valve rod and the valve seat is changed into the sealing through the sealing ring, so that the contact area between the sealing part and the valve rod is reduced, the friction force borne by the valve rod is reduced, the return difference of the valve rod is reduced, and the adjusting precision of the adjusting valve is improved;
through actuating mechanism's setting, change present two-layer rolling diaphragm into with the single diaphragm originally, make actuating mechanism go up the rolling diaphragm of the effect of diaphragm chamber above in the rolling diaphragm, the effect of lower diaphragm chamber is in the rolling diaphragm below, makes the diaphragm direction can not change to the life of extension diaphragm avoids the medium leakage that the diaphragm caused after damaging.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the valve cartridge of the present invention;
FIG. 4 is a schematic view of the construction of the bellows of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 1 at B in accordance with the present invention;
fig. 6 is a schematic structural view of an actuator in the present invention.
The labels in the figure are: the valve comprises a valve body 1, a valve seat 2, a valve cover 3, a balance cavity 31, a seal hole 32, a gasket 33, a seal pressing sleeve 34, a seal ring 35, a pressing plate 36, a gland 4, a column 5, a top plate 6, an actuating mechanism 7, a lower membrane cover 71, a middle membrane cover 72, an upper membrane cover 73, a tray 74, a pressure plate 75, a rolling membrane 76, a guide sleeve 8, a corrugated pipe 9, a valve core 10, a nut 101, a pressure guiding hole 102, a valve rod 11, an adjusting component 12, a pressure adjusting plate 121, an inner ring spring 122, an outer ring spring 123, a spring seat 124, an anti-rotation component 13, an anti-rotation groove 131, an anti-rotation hole 132 and an anti-rotation pin 133.
Detailed Description
The self-operated differential pressure regulating valve of the 1200MW sealing oil system of the present invention is further described in the following embodiments with reference to the accompanying drawings.
Referring to the attached drawings 1-4, the self-operated differential pressure regulating valve of the 1200MW sealing oil system comprises a valve body 1, a valve seat 2 arranged in the valve body 1, a valve cover 3 arranged at the top of the valve body 1 and a gland 4, wherein the gland 4 is connected with the valve cover 3, an upright post 5 arranged on the gland 4 and a top plate 6 arranged at the top of the upright post 5; the valve is characterized by further comprising an actuating mechanism 7 arranged on the top plate 6, a guide sleeve 8 arranged at the top of the valve body 1 and connected with the valve cover 3, a corrugated pipe 9 arranged on the guide sleeve 8, a valve rod 11 arranged on the valve cover 3 and fixedly connected with the actuating mechanism 7, a valve core 10 arranged on the valve rod 11 and connected with the corrugated pipe 9, an adjusting component 12 arranged on the outer side of the valve cover 3 and an anti-rotation component 13 arranged on the valve core 10 and the guide sleeve 8; the anti-rotation component 13 comprises an anti-rotation groove 131 arranged on the valve core 10, an anti-rotation hole 132 arranged on the guide sleeve 8 and an anti-rotation pin 133 arranged in the anti-rotation hole 132; the inner ring spring 122 and the outer ring spring 123 have opposite rotation directions; a balance cavity 31 is arranged on the valve cover 3; the corrugated pipe 9 arranged on the guide sleeve 8 is positioned in the balance cavity 31; a nut 101 connected with the corrugated pipe 9 is arranged on the valve core 10 which is arranged on the valve rod 11 and connected with the corrugated pipe 9; according to the utility model, the rotation-proof component 13 is arranged to limit the valve rod 11, so that the valve core 11 is prevented from rotating in the process of moving up and down to damage the corrugated pipe 9, the corrugated pipe 9 is protected, and the service life of the valve is prolonged.
Referring to fig. 1 to 4, the adjusting assembly 12 of the present invention includes a pressure adjusting disk 121 mounted on the bonnet 3, a spring seat 124 mounted on the valve stem 11, and an inner coil spring 122 and an outer coil spring 123 mounted on the pressure adjusting disk 121 and connected to the spring seat 124; a balance cavity 31 is arranged on the valve cover 3; the inner ring spring 122 and the outer ring spring 123 have opposite rotation directions; the corrugated pipe 9 arranged on the guide sleeve 8 is positioned in the balance cavity 31; a nut 101 connected with the corrugated pipe 9 is arranged on the valve core 10 which is arranged on the valve rod 11 and connected with the corrugated pipe 9; according to the utility model, the rotating directions of the inner ring spring 122 and the outer ring spring 123 are opposite, so that the eccentric force of the inner ring spring 122 and the eccentric force of the outer ring spring 123 are mutually offset, and the valve rod 11 and the valve core 10 cannot deviate in the vertical movement process, thereby improving the stability of the valve core 10 and the valve rod 11 and improving the adjustment precision of the valve.
Referring to fig. 1-5, in the present invention, a pressure guiding hole 102 penetrating through the balance cavity 31 is formed in the valve core 10, and a pressure guiding hole 102 is also formed in the guide sleeve 8; the valve cover 3 is provided with a sealing hole 32, and a gasket 33 and a sealing pressing sleeve 34 are arranged in the sealing hole; the sealing pressing sleeve 34 is provided with a sealing ring 35; the top of the valve cover 3 is provided with a pressing plate 36 connected with the sealing pressing sleeve 34; according to the utility model, through the arrangement of the pressure guide hole 102, the pressure before the valve enters the balance cavity 31 through the pressure guide hole 102 on the valve core 10, the pressure before the valve acts on the outer surface of the corrugated pipe 9, the pressure after the valve is guided into the corrugated pipe 9 through the pressure guide hole 102 on the guide sleeve 34 and acts on the inner surface of the corrugated pipe 8, so that the two forces are respectively balanced with the pressure after the valve acting on the valve core 10 and the pressure before the valve, therefore, when the actuating mechanism 7 controls the movement of the valve core 10, the interference of the pressure before the valve and the pressure after the valve can be avoided, and the adjusting precision of the valve can be improved.
Referring to fig. 1-6, the actuator 7 of the present invention includes a lower cover 71 mounted on the top plate 6, a middle cover 72 mounted on the lower cover 71, an upper cover 73 mounted on the middle cover 72, a tray 74 and a pressure plate 75 mounted on the valve rod 11, and rolling diaphragms 76 mounted on the top and bottom of the middle cover 72 and connected to the upper cover 73 and the lower cover 71, respectively; according to the utility model, the rolling diaphragms 76 are arranged at the top and the bottom of the middle diaphragm cover 72, so that the pressure of the upper diaphragm cavity in the actuating mechanism 7 acts on the rolling diaphragm 76 at the top of the middle diaphragm cover 72, and the pressure of the lower diaphragm cavity in the actuating mechanism acts on the rolling diaphragm 76 at the bottom of the middle diaphragm cover 72, so that the pressures of the upper diaphragm cavity and the lower diaphragm cavity act on the two rolling diaphragms 76 respectively, the direction of the rolling diaphragm 76 cannot change along with the change of the pressures of the upper diaphragm cavity and the lower diaphragm cavity, and the service life of the rolling diaphragm 76 is prolonged, and in the process of moving the rolling diaphragm 76 up and down, the effective area of the rolling diaphragm 76, namely the distance between the diaphragm cover and the tray cannot change, so that the stress of the rolling diaphragm 76 is more uniform, and the actuating mechanism 7 is more stable in the control valve rod 11.
Referring to fig. 1-6, in the working process of the present invention, a medium flows through a valve body 1 and a valve core 10, and pressure before the valve is respectively guided into a balance cavity 31 through a pressure guide hole 102 on the valve core 10 and a guide sleeve 8, so that the pressure before the valve acts on the outer surface of a corrugated pipe 9, the pressure after the valve is guided into the corrugated pipe 9, the pressure after the valve acts on the inner surface of the corrugated pipe 9, and the two forces are respectively balanced with the pressure after the valve and the pressure before the valve acting on the valve core 10; when the pressure behind the valve is too small, the pressure of the upper diaphragm cavity is too small because the pipeline behind the valve is connected with the upper diaphragm cavity of the actuating mechanism 7, so that the pressure of the lower diaphragm cavity is larger than the pressure of the upper diaphragm cavity, the rolling diaphragm 76 moves upwards, the rolling diaphragm 76 drives the tray 74 to move upwards, the tray 74 drives the valve rod 11 to move upwards, the valve rod 11 drives the valve core 10 to move upwards, the opening of the valve is increased, the flow is increased, the pressure behind the valve is increased until the pressure of the upper diaphragm cavity is equal to the pressure of the lower diaphragm cavity and reaches balance; when the pressure behind the valve is too high, the valve core moves downwards, the opening degree of the valve is reduced, and the pressure behind the valve is reduced until the pressure of the upper diaphragm chamber is equal to the pressure of the lower diaphragm chamber to achieve balance.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (7)
1. A1200 MW sealing oil system self-operated differential pressure regulating valve comprises a valve body (1), a valve seat (2) arranged in the valve body (1), a valve cover (3) and a gland (4) which are arranged at the top of the valve body (1), wherein the gland (4) is connected with the valve cover (3), an upright post (5) arranged on the gland (4) and a top plate (6) arranged at the top of the upright post (5); the valve is characterized by further comprising an actuating mechanism (7) arranged on the top plate (6), a guide sleeve (8) arranged at the top of the valve body (1) and connected with the valve cover (3), a corrugated pipe (9) arranged on the guide sleeve (8), a valve rod (11) arranged on the valve cover (3) and fixedly connected with the actuating mechanism (7), a valve core (10) arranged on the valve rod (11) and connected with the corrugated pipe (9), an adjusting component (12) arranged on the outer side of the valve cover (3) and an anti-rotation component (13) arranged on the valve core (10) and the guide sleeve (8); the anti-rotation component (13) comprises an anti-rotation groove (131) arranged on the valve core (10), an anti-rotation hole (132) arranged on the guide sleeve (8) and an anti-rotation pin (133) arranged in the anti-rotation hole (132).
2. The self-operated differential pressure regulating valve of a 1200MW seal oil system as claimed in claim 1, wherein: the adjusting assembly (12) comprises a pressure adjusting disc (121) arranged on the valve cover (3), a spring seat (124) arranged on the valve rod (11), and an inner ring spring (122) and an outer ring spring (123) which are arranged on the pressure adjusting disc (121) and connected with the spring seat (124).
3. The self-operated differential pressure regulating valve of a 1200MW seal oil system as claimed in claim 2, wherein: the inner ring spring (122) and the outer ring spring (123) are opposite in rotation direction.
4. The self-operated differential pressure regulating valve of a 1200MW seal oil system as claimed in claim 1, wherein: a balance cavity (31) is arranged on the valve cover (3); the corrugated pipe (9) arranged on the guide sleeve (8) is positioned in the balance cavity (31); and a nut (101) connected with the corrugated pipe (9) is arranged on a valve core (10) which is arranged on the valve rod (11) and connected with the corrugated pipe (9).
5. The 1200MW seal oil system self-operated differential pressure regulating valve as claimed in claim 1 or 4, wherein: and the valve core (10) is provided with a pressure guide hole (102) communicated with the balance cavity (31), and the guide sleeve (8) is also provided with a pressure guide hole (102).
6. The self-operated differential pressure regulating valve of 1200MW sealing oil system according to claim 4, characterized in that: a sealing hole (32) is formed in the valve cover (3), and a gasket (33) and a sealing pressing sleeve (34) are arranged in the sealing hole; the sealing pressing sleeve (34) is provided with a sealing ring (35); and a pressing plate (36) connected with the sealing pressing sleeve (34) is arranged at the top of the valve cover (3).
7. The self-operated differential pressure regulating valve of a 1200MW seal oil system as claimed in claim 1, wherein: the actuating mechanism (7) comprises a lower membrane cover (71) arranged on the top plate (6), a middle membrane cover (72) arranged on the lower membrane cover (71), an upper membrane cover (73) arranged on the middle membrane cover (72), a tray (74) and a pressure plate (75) arranged on the valve rod (11), and rolling membranes (76) which are respectively arranged at the top and the bottom of the middle membrane cover (72) and are connected with the upper membrane cover (73) and the lower membrane cover (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123290308.9U CN216618686U (en) | 2021-12-25 | 2021-12-25 | Self-operated differential pressure regulating valve of 1200MW sealing oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123290308.9U CN216618686U (en) | 2021-12-25 | 2021-12-25 | Self-operated differential pressure regulating valve of 1200MW sealing oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216618686U true CN216618686U (en) | 2022-05-27 |
Family
ID=81682741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123290308.9U Active CN216618686U (en) | 2021-12-25 | 2021-12-25 | Self-operated differential pressure regulating valve of 1200MW sealing oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216618686U (en) |
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2021
- 2021-12-25 CN CN202123290308.9U patent/CN216618686U/en active Active
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