CN217842830U - Adjustable back pressure valve for nuclear power equipment - Google Patents
Adjustable back pressure valve for nuclear power equipment Download PDFInfo
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- CN217842830U CN217842830U CN202221569846.3U CN202221569846U CN217842830U CN 217842830 U CN217842830 U CN 217842830U CN 202221569846 U CN202221569846 U CN 202221569846U CN 217842830 U CN217842830 U CN 217842830U
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- valve body
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- supporting seat
- nuclear power
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- 238000007789 sealing Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000013011 mating Effects 0.000 claims abstract description 11
- 210000004907 gland Anatomy 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002222 downregulating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses an adjustable back pressure valve for nuclear power equipment, a supporting seat is arranged in a valve body, a valve core is arranged at the bottom of the supporting seat, a slidable adjusting rod is arranged in the supporting seat, an adjusting nut matched with the adjusting rod is arranged on the adjusting rod, and an adjusting spring is arranged between the adjusting nut and the valve core; the left and right mating flanges matched with the valve body are respectively arranged on two sides of the valve body, a left sealing ring and a right sealing ring are arranged between the left and right mating flanges and the valve body, and the valve body is provided with a water inlet hole and a water outlet hole. During the use, realize power transmission through adjusting pole and adjusting nut cooperation, control adjusting nut axial motion has saved the spatial structure who adjusts pole upper portion, and then has reduced valve size and weight, can realize that pressure is adjustable under the condition of not demolising the pipeline, satisfies nuclear power equipment's debugging and maintenance demand, and compact structure is small and exquisite simultaneously, and the installation of being convenient for is dismantled and is maintained in the future.
Description
Technical Field
The utility model mainly relates to a technical field of back pressure valve, in particular to an adjustable back pressure valve for nuclear power equipment especially relates to a totally closed adjustable back pressure valve for nuclear power equipment.
Background
In the prior art, as shown in fig. 1, a backpressure valve of 1A in seismic rating is typically used in the 2500 pound reactor coolant line of a nuclear power plant. Existing designs place pressure control elements inside the tubes, taking into account the radioactivity of the reactor coolant. Before installation, the control pressure needs to be adjusted in advance, and then a subsequent pipeline is installed. Although the safety of the structural design is guaranteed, the adjustment and maintenance work is inconvenient, if the discharge pressure needs to be finely adjusted, the front pipeline needs to be closed, the rear pipeline is dismantled, spare and accessory parts are cleaned, the pressure is set again, then the pipeline installation is recovered, the operation is tried again, and the whole process is quite complicated.
Therefore, the market strongly needs a back pressure valve which is convenient to adjust, install and detach.
Disclosure of Invention
The utility model provides a to the above-mentioned problem, a adjustable back pressure valve for nuclear power equipment is provided, through the improvement of structure, not only can satisfy the zero requirement of leaking of pipeline full-sealing medium, can realize moreover that pressure is adjustable under the condition of not demolising the pipeline, satisfies nuclear power equipment's debugging and maintains the demand.
The purpose of the utility model can be realized by the following technical scheme: an adjustable back pressure valve for nuclear power equipment comprises a valve body and an upper gland matched with the valve body, and is characterized in that a supporting seat is arranged in the valve body, a valve core is arranged at the bottom of the supporting seat, a slidable adjusting rod is arranged in the supporting seat, an adjusting nut matched with the adjusting rod is arranged on the adjusting rod, and an adjusting spring is arranged between the adjusting nut and the valve core; the left and right mating flanges matched with the valve body are respectively arranged on two sides of the valve body, a left sealing ring and a right sealing ring are arranged between the left and right mating flanges and the valve body, and the valve body is provided with a water inlet hole and a water outlet hole.
Preferably, the adjusting rod is connected with the adjusting nut through a thread structure, the adjusting nut is provided with a group of symmetrically arranged guide convex blocks, and the inner wall of the supporting seat is provided with a group of guide grooves matched with the guide convex blocks.
Furthermore, a spring supporting hole is formed in the valve core, a group of longitudinal and transverse flow guide holes are formed in the middle of the valve core, the bottom of the valve core is a spherical surface, and hard alloy sealing surfaces are respectively arranged on the side portions of the contact positions of the valve core and the valve body.
Furthermore, the longitudinal and transverse flow guide holes are formed by a group of vertically communicated pore passages, one end of each longitudinal and transverse flow guide hole is communicated with the spring support hole, and the other end of each longitudinal and transverse flow guide hole is communicated with the water outlet hole of the valve body.
Compared with the prior art, the technical scheme of the utility model except whole technical scheme's improvement, still include the improvement in the aspect of many details, particularly, have following beneficial effect:
1. according to the improved scheme of the utility model, a supporting seat is arranged in the valve body, a valve core is arranged at the bottom of the supporting seat, a slidable adjusting rod is arranged in the supporting seat, an adjusting nut matched with the adjusting rod is arranged on the adjusting rod, an adjusting spring is arranged between the adjusting nut and the valve core, power transmission is realized by matching the adjusting rod and the adjusting nut, the axial movement of the adjusting nut is controlled, the space structure at the upper part of the adjusting rod is saved, and the size and the weight of the valve are further reduced;
2. in the structure of the utility model, a plurality of sealing structures are arranged, the two sides of the valve body are respectively provided with a left mating flange and a right mating flange which are matched with the valve body, and a left sealing ring and a right sealing ring are arranged between the left mating flange and the valve body, so that the valve body forms static sealing to prevent micro leakage, and the requirement of zero leakage of a pipeline full-sealing medium is met through layer-upon-layer protection;
3. the utility model discloses a structure can realize under the condition of not demolising the pipeline that pressure is adjustable, satisfies nuclear power equipment's debugging and maintains the demand, and compact structure is small and exquisite simultaneously, and the installation of being convenient for is dismantled and is maintained in the future, facilitate promotion and utilization.
Drawings
Fig. 1 is a schematic structural diagram of the prior art.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic diagram of the local enlarged structure of the present invention.
Fig. 4 is a schematic view of the valve core structure of the present invention.
Fig. 5 is a schematic structural view of the adjusting nut of the present invention.
Fig. 6 is a schematic structural view of the supporting seat of the present invention.
Fig. 7 is a partial plan view of the support base of the present invention.
The figures are labeled as follows:
1. the valve comprises a left mating flange, a left sealing ring 2, a valve body 3, a first bolt 4, a first nut 5, an upper gland 6, a second bolt 7, a second nut 8, a screw 9 and an upper gland sealing ring 10;
11. the valve comprises a supporting seat, a 12-adjusting rod, a 13-adjusting rod sealing ring, a 14-adjusting nut, a 15-valve body sealing ring, a 16-adjusting spring, a 17-valve core, a 18-third bolt, a 19-third nut and a 20-right sealing ring;
21. right companion flange, 22 spring support holes, 23 longitudinal and transverse diversion holes, 24 hard alloy sealing surfaces, 25 spherical surfaces, 26 guide lugs and 27 guide grooves.
Detailed Description
The following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings, will make it clear to those skilled in the art how the invention may be practiced. While the invention has been described in connection with its preferred embodiments, these embodiments are intended to be illustrative, and not limiting, of the scope of the invention.
As shown in fig. 2, an adjustable back pressure valve for nuclear power equipment comprises a valve body 3 and an upper gland 6 matched with the valve body, and is different from the prior art in that a supporting seat 11 is arranged in the valve body, a valve core 17 is arranged at the bottom of the supporting seat, a slidable adjusting rod 12 is arranged in the supporting seat, an adjusting nut 14 matched with the adjusting rod is arranged on the adjusting rod, the adjusting rod can drive the adjusting nut to axially move along the inner wall of the supporting seat, and an adjusting spring 16 is arranged between the valve cores of the adjusting nut and used for controlling the opening and closing of the valve core; the both sides of valve body are equipped with respectively with valve body complex left and right companion flange, are equipped with left and right sealing washer 2, 20 between left and right companion flange and the valve body, and the valve body is equipped with inlet opening and apopore.
The utility model discloses before the use, need debug earlier. Before debugging, firstly removing the fixing bolt and nut of the upper gland and dismantling the upper gland 6. During debugging, the square head of the adjusting rod is clamped by a wrench, the adjusting rod is rotated to drive the adjusting nut to move downwards, and the adjusting nut presses the adjusting spring downwards to push the valve core to be closed. The medium enters the valve body from the inlet of the valve, and when the pressure of the medium is greater than the pressure of the spring above the valve core, the valve core is opened, and the medium is discharged to the water outlet pipeline. And then slowly rotating the adjusting rod to control the spring force above the valve core and set the discharge pressure to the system requirement. And finally, the upper valve cover is fastened on the valve body through bolts and nuts to realize full sealing.
Example 1
The valve body 3 of the utility model is internally provided with a supporting seat 11, the bottom of the supporting seat is provided with a valve core 17 which can slide up and down, a slidable adjusting rod 12 is arranged in the supporting seat, the adjusting rod is provided with an adjusting nut 14 which is matched with the adjusting rod, and an adjusting spring 16 is arranged between the adjusting nut and the valve core; the both sides of valve body are equipped with respectively with valve body complex left and right companion flange, are equipped with left and right sealing washer 2, 20 between left and right companion flange and the valve body, and the valve body is equipped with inlet opening and apopore.
Specifically, the adjusting rod is connected with the adjusting nut through a thread structure, the adjusting nut is provided with a group of guide convex blocks 26 which are symmetrically arranged, and the inner wall of the supporting seat is provided with a group of guide grooves 27 which are matched with the guide convex blocks. When the valve core is used, the adjusting rod is rotated to drive the adjusting nut to move downwards, so that the adjusting nut continuously presses the adjusting spring, and the valve core is pushed to be closed.
Further, be equipped with spring support hole 22 on the case, the one end of regulating spring is placed in spring support hole 22, the middle part of case is equipped with a set of water conservancy diversion hole 23 of crossing vertically and horizontally, the bottom of case is spherical surface 25, be connected through the back taper structure between spherical surface and the case body simultaneously, the leakproofness after the case closure can be guaranteed to this back taper structure, there is the side part with the valve body contact on this back taper structure, the surface of side part is equipped with sealed face 24 of carbide, the sealed face thickness of carbide is 1-3mm.
Furthermore, the longitudinal and transverse diversion holes 23 are formed by a group of vertical and communicated pore channels, one end of each longitudinal and transverse diversion hole is communicated with the spring support hole, and the other end of each longitudinal and transverse diversion hole is communicated with the water outlet hole of the valve body. An upper gland sealing ring is arranged between the supporting seat and the upper gland, and a valve body sealing ring is arranged between the supporting seat and the valve body, so that the medium can be effectively prevented from leaking.
Example 2
The utility model discloses when debugging, adjust the square head of pole with the spanner centre gripping, the regulation pole is rotated to the regulation pole, and it is down to drive adjusting nut, and adjusting nut pushes down regulating spring, promotes the valve core and closes. The medium enters the valve body from the inlet of the valve, and when the pressure of the medium is greater than the pressure of the spring above the valve core, the valve core is opened, and the medium is discharged to the water outlet pipeline.
When the regulating valve is used, the regulating rod can be slowly rotated to control the spring force above the valve core, and the discharge pressure is set to meet the system requirement. And finally, the upper valve cover is fastened on the valve body through bolts and nuts to realize full sealing.
And simultaneously, in order to prevent the medium leakage, the utility model discloses the structure adopts six sealing washers. The left and right mating flange joint surfaces are respectively provided with a left and right sealing ring to realize the static sealing of the flange joint surfaces. The adjusting rod rotates, and the upper part of the adjusting rod is provided with two sealing rings to realize dynamic sealing in the moving process. And a valve body sealing ring is arranged on the joint surface of the middle supporting seat and the valve body, so that the medium in the valve body is prevented from leaking to the atmospheric environment. And finally, an upper gland sealing ring is arranged on the joint surface of the upper gland and the supporting seat, and static sealing is carried out to prevent trace leakage at the dynamic sealing position of the valve rod. And the leakage of the reactor coolant is avoided by layer-upon-layer protection.
The structure adjusting rod adopts a concealed rod type transmission method for adjustment. The adjusting rod is in threaded fit with the adjusting nut, so that power transmission is realized. A group of symmetrical guide convex blocks are arranged on the outer edge of the adjusting nut and matched with guide grooves in the supporting seat to realize circumferential limiting. When the adjusting rod rotates, the adjusting nut can only axially move under the action of the thread due to the axial limit of the adjusting nut. By the structure, the upper space of the adjusting rod is saved, and the size and the weight of the valve are further reduced, so that the device is compact in structure, and the production cost is reduced.
It should be noted that many variations and modifications of the embodiments of the present invention are possible, which are fully described, and are not limited to the specific examples of the above embodiments. The above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In conclusion, the scope of the present invention shall include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art, and shall be subject to the appended claims.
Claims (5)
1. An adjustable back pressure valve for nuclear power equipment comprises a valve body and an upper gland matched with the valve body, and is characterized in that a supporting seat is arranged in the valve body, a valve core is arranged at the bottom of the supporting seat, a slidable adjusting rod is arranged in the supporting seat, an adjusting nut matched with the adjusting rod is arranged on the adjusting rod, and an adjusting spring is arranged between the adjusting nut and the valve core; the left and right mating flanges matched with the valve body are respectively arranged on two sides of the valve body, a left sealing ring and a right sealing ring are arranged between the left and right mating flanges and the valve body, and the valve body is provided with a water inlet hole and a water outlet hole.
2. The adjustable back pressure valve for nuclear power equipment as claimed in claim 1, wherein the adjusting rod is connected with the adjusting nut through a threaded structure, the adjusting nut is provided with a set of symmetrically arranged guide protrusions, and the inner wall of the supporting seat is provided with a set of guide grooves matched with the guide protrusions.
3. The adjustable back pressure valve for the nuclear power equipment as claimed in claim 1, wherein the valve core is provided with a spring support hole, the middle part of the valve core is provided with a group of longitudinal and transverse flow guide holes, the bottom of the valve core is spherical, and the side parts of the contact part of the valve core and the valve body are respectively provided with a hard alloy sealing surface.
4. The adjustable back pressure valve for nuclear power equipment as recited in claim 3, wherein the vertical and horizontal pilot holes are formed by a set of vertically communicating holes, one end of the vertical and horizontal pilot holes is communicated with the spring support hole, and the other end is communicated with the water outlet hole of the valve body.
5. The adjustable back pressure valve for nuclear power equipment as claimed in claim 1, wherein an upper gland seal ring is provided between the support seat and the upper gland, and a valve body seal ring is provided between the support seat and the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221569846.3U CN217842830U (en) | 2022-06-22 | 2022-06-22 | Adjustable back pressure valve for nuclear power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221569846.3U CN217842830U (en) | 2022-06-22 | 2022-06-22 | Adjustable back pressure valve for nuclear power equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217842830U true CN217842830U (en) | 2022-11-18 |
Family
ID=84026777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221569846.3U Active CN217842830U (en) | 2022-06-22 | 2022-06-22 | Adjustable back pressure valve for nuclear power equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217842830U (en) |
-
2022
- 2022-06-22 CN CN202221569846.3U patent/CN217842830U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An adjustable backpressure valve for nuclear power equipment Granted publication date: 20221118 Pledgee: Agricultural Bank of China Limited Shanghai Yangtze River Delta Integrated Demonstration Zone Sub branch Pledgor: SHANGHAI IVCO VALVE CO.,LTD. Registration number: Y2024310000185 |