CN204900954U - Hydrostatic test relief valve - Google Patents
Hydrostatic test relief valve Download PDFInfo
- Publication number
- CN204900954U CN204900954U CN201520618303.XU CN201520618303U CN204900954U CN 204900954 U CN204900954 U CN 204900954U CN 201520618303 U CN201520618303 U CN 201520618303U CN 204900954 U CN204900954 U CN 204900954U
- Authority
- CN
- China
- Prior art keywords
- sealing
- sealed
- hydrostatic test
- locking device
- valve gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a hydrostatic test relief valve, including disk seat, valve gap, sealing device and locking device. Be formed with sealed face on the access road inside wall of disk seat. The valve gap is installed on the disk seat to with access road interior rectify right. Sealing device includes sealing plug, bracing piece, the sealed pad and two sealing washers. The sealing plug includes and head, setting are sealed up in sealed first the inner to the bellied sealing flange in outer lane to the sealed column of answering of facing. The bracing piece is connected with the sealing plug, stretches out to the valve gap. The outer lane at sealed head is established to the sealed cover that fills up to press from both sides and establish between sealing flange and disk seat. The outer lane at sealed head is established to sealed snare to separate each other in the axial and set up. Locking device installs on the valve gap, offsets with the bracing piece, supports sealing device and presses on the disk seat. This experiment relief valve adopts multistage sealedly, and the sealed pad that locking device adopted the pressure mode of supporting can guarantee last one -level is sealed, has satisfied the sealed requirement of hydrostatic test, can not take place the phenomenon that sealed face is beated and was lost efficacy.
Description
Technical field
The utility model relates to technical field of nuclear power, more particularly, relates to a kind of hydrostatic test safety valve.
Background technique
The VVP safety valve that VVP main steam line in correlation technique is selected is generally spring-loaded pressure relief valve, the valve seat of spring-loaded pressure relief valve is connected to main pipeline, as second side hydraulic test pressure border, cannot remove, in the second side hydrostatic test, need the test pressure bearing 12.8Mpa, exceed its setting valve (8.5/8.7Mpa)
Spring-loaded pressure relief valve is as the drawback on second side hydrostatic test border:
1. bear test high pressure: in the hydrostatic test, safety valve bears comparatively high test pressures, and the sealing surface of flap and valve seat easily produces leakage;
2. repeatedly grind, increase workload: before equipment is installed to factory, need carry out the grinding work meeting the hydrostatic test, after the hydrostatic test, also need the grinding work again carrying out meeting the work such as subsequent thermal examination on-line tuning, 21 deck valve family of power and influence flap valve seat grinding workloads are large; Repeatedly grind the wearing and tearing also causing flap, sealing surface of seat, cause Set pressure deviation, affect life of valve;
3. there is potential safety hazard: the valve leak occurred in the hydrostatic test, take-off etc. all need to eliminate by increasing the female locking torque of the back of the body, and too high locking torque causes valve rod, flap sealing surface of seat damage risk; If valve seal lost efficacy in test, there is the damage possibility causing valve flap sealing surface of seat, and also can cause hydrostatic test failure.
Model utility content
The technical problems to be solved in the utility model is, provides a kind of hydrostatic test safety valve of improvement.
The utility model solves the technological scheme that its technical problem adopts: construct a kind of hydrostatic test safety valve, comprise valve seat, valve gap, seal arrangement and locking device;
Described valve seat is provided with inlet channel, the bell mouth shape sealing surface madial wall of described inlet channel being formed with the straight-tube shape sealing surface corresponding with described seal arrangement or arranging in described valve seat;
Described valve gap is arranged on described valve seat, and with described inlet channel in rectify right;
Described seal arrangement comprises sealing plug, strut, sealing gasket and at least two seal rings, and described sealing plug comprises the column sealing head corresponding with described sealing surface profile, is arranged on the sealing flange of the inner end of described sealing head to outer ring projection; Described strut is connected with the inner of described sealing plug, and stretches out to described valve gap; Described sealing gasket is set in the outer ring of described sealing head, and is folded between the side of described sealing flange and the internal face of described valve seat; Described at least two seal rings are set in the outer ring of described sealing head, and in axially spaced setting;
Described locking device is arranged on described valve gap, offsets with described strut, compresses power be pressed on described valve seat by described seal arrangement to provide one.
Preferably, described valve gap is provided with the locking holes of installing for described locking device, and described locking device can axially movably match with described locking holes, to regulate described sealing flange to the pressure force of described sealing gasket.
Preferably, described locking device comprises the bolt with described locking holes screw-thread fit.
Preferably, one end that described strut is relative with described valve gap be provided with for described locking device compress compress plate.
Preferably, compress the plate end face relative with described valve gap described in and be provided with the inner fovea part compressed for described locking device.
Preferably, the end face outer ring, one end that described sealing head is relative with described flange is provided with for guiding the guide portion be inserted in described inlet channel.
Preferably, described guide portion is taper or fillet structure.
Preferably, described sealing plug and described strut are structure as a whole.
Preferably, the outer ring of described sealing head is provided with the annular seal groove installed for described seal ring.
Preferably, described at least two seal rings comprise two seal rings.
Implement hydrostatic test safety valve of the present utility model, there is following beneficial effect: this experimental safe valve arrangement is simple, easy accessibility, adopt multi-stage sealed mode, and the sealing of the sealing gasket of afterbody can be ensured by regulation locking device, can not leak, meet hydrostatic test seal request, locking device compresses seal arrangement, also can not occur sealing surface beat lost efficacy phenomenon.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the cross-sectional view of the hydrostatic test safety valve in the utility model embodiment;
Fig. 2 is the partial cutaway schematic of the seal arrangement in Fig. 1.
Embodiment
In order to there be understanding clearly to technical characteristics of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figures 1 and 2, the hydrostatic test safety valve in the utility model preferred embodiment comprises valve seat 1, valve gap 2, seal arrangement 3 and locking device 4.
In certain embodiments, valve seat 1 is provided with inlet channel 11 and pressure release passage 12, the madial wall of inlet channel 11 is formed with the straight-tube shape sealing surface 111 corresponding with seal arrangement 3.
Further, valve gap 2 is arranged on valve seat 1, and with inlet channel 11 in rectify right.Valve gap 2 is threaded with valve seat 1, ensures the intensity connected.Valve gap 2 is provided with the locking holes 21 of installing for locking device 4, and in other embodiments, locking device 4 also can be arranged on inside valve gap 2.
In certain embodiments, seal arrangement 3 comprises sealing plug 31, strut 32, sealing gasket 33 and two seal rings 34.Sealing plug 31 comprises the column sealing head 311 corresponding with sealing surface 111 profile, is arranged on the sealing flange 312 of the inner end of sealing head 311 to outer ring projection.Sealing head 311 is cylindric, and further, the end face outer ring, one end that sealing head 311 is relative with flange is provided with for guiding the guide portion 313 be inserted in inlet channel 11.Preferably, guide portion 313 is in taper, and certainly, guide portion 313 also can be fillet structure.
In other embodiments, sealing surface 111 also can be the horn mouth bar shape structure arranged inside valve seat 1, and meanwhile, sealing head 311 also can be cone-like structure, conveniently offsets with sealing surface 111 inside valve seat 1, is beneficial to the sealing of sealing surface 111.
Further, strut 32 is connected with the inner of sealing plug 31, and stretches out to valve gap 2, and valve gap 2 side can be provided support sealing plug 31, ensures sealing.Sealing gasket 33 is set in the outer ring of sealing head 311, and be folded between the side of sealing flange 312 and the internal face of valve seat 1, when valve gap 2 side provides support power to strut 32, sealing gasket 33 can be allowed to be squeezed, reach the effect to sealing between sealing flange 312 and valve seat 1.In order to proof strength, sealing plug 31 and strut 32 are structure as a whole, can not due to link position variable effect support force.
Further, two seal rings 34 are set in the outer ring of sealing head 311, and in axially spaced setting, seal respectively at the axial diverse location of sealing head 311 and sealing surface 111.Two seal rings 34 are in different position seals, and when the seal ring 34 of the entry end near inlet channel 11 lost efficacy by high-pressure leakage, seal ring 34 below can continue to play seal action.
After all seal rings 34 all lost efficacy, sealing gasket 33 played final seal action, can effectively prevent safety valve leakage failure.The outer ring of sealing head 311 is provided with the annular seal groove installed for seal ring 34, is convenient to the installation location of seal ring 34.In other embodiments, winding also can be multiple to the quantity of the seal ring 34 on sealing head 311, forms the sealing of multiple position.
In certain embodiments, locking device 4 is arranged on valve gap 2, offsets with strut 32, compresses power be pressed on valve seat 1 by seal arrangement 3 to provide one, ensures that sealing gasket 33 position can keep sealing state.Further, valve gap 2 is provided with the locking holes 21 of installing for locking device 4, and locking device 4 can axially movably match with locking holes 21, to regulate the pressure force of sealing flange 312 pairs of sealing gaskets 33.
Preferably, locking device 4 comprises the bolt with locking holes 21 screw-thread fit, turns bolt adjusted position, regulates the pressure force to sealing gasket 33.In other embodiments, locking device 4 also can be telescopic oil cylinder etc. and compresses mutually with strut 32.
Preferably, one end that strut 32 is relative with valve gap 2 be provided with for locking device 4 compress compress plate 35, compress the compressed area that plate 35 can increase locking device 4, and can and the inner face of valve gap 2 coordinate, prevent from strut 32 from overturning affecting compressing power to sealing gasket 33.Further, compress plate 35 end face relative with valve gap 2 and be provided with the inner fovea part 351 compressed for locking device 4, the forced position of locking device 4 can be allowed more accurate.
Understandably, above-mentioned each technical characteristics can combination in any use and unrestricted.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a hydrostatic test safety valve, is characterized in that, comprises valve seat (1), valve gap (2), seal arrangement (3) and locking device (4);
Described valve seat (1) is provided with inlet channel (11), the bell mouth shape sealing surface (111) madial wall of described inlet channel (11) being formed with the straight-tube shape sealing surface (111) corresponding with described seal arrangement (3) or arranging in described valve seat (1);
Described valve gap (2) is arranged on described valve seat (1), and with described inlet channel (11) interior rectify right;
Described seal arrangement (3) comprises sealing plug (31), strut (32), sealing gasket (33) and at least two seal rings (34), and described sealing plug (31) comprises the column sealing head (311) corresponding with described sealing surface (111) profile, is arranged on the sealing flange (312) of the inner end of described sealing head (311) to outer ring projection; Described strut (32) is connected with the inner of described sealing plug (31), and stretches out to described valve gap (2); Described sealing gasket (33) is set in the outer ring of described sealing head (311), and is folded between the side of described sealing flange (312) and the internal face of described valve seat (1); Described at least two seal rings (34) are set in the outer ring of described sealing head (311), and in axially spaced setting;
Described locking device (4) is arranged on described valve gap (2), offsets with described strut (32), compresses power be pressed on described valve seat (1) by described seal arrangement (3) to provide one.
2. hydrostatic test safety valve according to claim 1, it is characterized in that, described valve gap (2) is provided with the locking holes (21) of installing for described locking device (4), described locking device (4) can axially movably match with described locking holes (21), to regulate described sealing flange (312) to the pressure force of described sealing gasket (33).
3. hydrostatic test safety valve according to claim 2, is characterized in that, described locking device (4) comprises the bolt with described locking holes (21) screw-thread fit.
4. the hydrostatic test safety valve according to any one of claims 1 to 3, is characterized in that, one end that described strut (32) is relative with described valve gap (2) be provided with for described locking device (4) compress compress plate (35).
5. hydrostatic test safety valve according to claim 4, is characterized in that, described in compress plate (35) end face relative with described valve gap (2) and be provided with for described locking device (4) inner fovea part (351) that compresses.
6. hydrostatic test safety valve according to claim 1, is characterized in that, the end face outer ring, one end that described sealing head (311) is relative with described flange is provided with for guiding the guide portion (313) be inserted in described inlet channel (11).
7. hydrostatic test safety valve according to claim 6, is characterized in that, described guide portion (313) is in taper or fillet structure.
8. hydrostatic test safety valve according to claim 1, is characterized in that, described sealing plug (31) and described strut (32) are structure as a whole.
9. hydrostatic test safety valve according to claim 1, is characterized in that, the outer ring of described sealing head (311) is provided with the annular seal groove installed for described seal ring (34).
10. hydrostatic test safety valve according to claim 9, is characterized in that, described at least two seal rings (34) comprise two seal rings (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520618303.XU CN204900954U (en) | 2015-08-17 | 2015-08-17 | Hydrostatic test relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520618303.XU CN204900954U (en) | 2015-08-17 | 2015-08-17 | Hydrostatic test relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204900954U true CN204900954U (en) | 2015-12-23 |
Family
ID=54923130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520618303.XU Active CN204900954U (en) | 2015-08-17 | 2015-08-17 | Hydrostatic test relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204900954U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795722A (en) * | 2017-12-06 | 2018-03-13 | 霍山嘉远智能制造有限公司 | A kind of bonnet water pressure test welding end floating seal frock |
-
2015
- 2015-08-17 CN CN201520618303.XU patent/CN204900954U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795722A (en) * | 2017-12-06 | 2018-03-13 | 霍山嘉远智能制造有限公司 | A kind of bonnet water pressure test welding end floating seal frock |
| CN107795722B (en) * | 2017-12-06 | 2024-01-26 | 霍山嘉远智能制造有限公司 | Floating sealing tool for welding end of valve cover hydrostatic test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204900954U (en) | Hydrostatic test relief valve | |
| CN203730863U (en) | Hydraulic pipe damping pressure release valve for coffee machine | |
| CN204457568U (en) | A kind of gas wellhead equipment adopting metal sealing | |
| CN105466643A (en) | Sealing method of aviation casting machine box cavity pressure test | |
| CN205504251U (en) | Pressurization connects | |
| CN203549042U (en) | Safe pull-off valve | |
| CN203730508U (en) | Oil drainage bolt | |
| CN106246916A (en) | A kind of hydraulic pressure plugging device of pipe joint | |
| CN202972298U (en) | Expansion joint of pipeline | |
| CN205206768U (en) | Tap is led in air guide | |
| CN103644343A (en) | Safe emergency release coupler | |
| CN208331241U (en) | A kind of High Pressure Sealing Gland | |
| CN203641767U (en) | Pressurized plugging device for oil-gas transmission pipeline | |
| CN202266770U (en) | Double-circulation rotary joint with inner pipe looseness prevention structure | |
| CN204495643U (en) | Internal-expansion type steel pipe water-pressure sealed circle | |
| CN202418188U (en) | Radial high-pressure stop nut | |
| CN105508611A (en) | Stuffing sealing structure and plunger pump with same | |
| CN205743833U (en) | A kind of high pressure VR blocks up | |
| CN105804989B (en) | Drilling pump bonnet threaded pre-tightening locking device | |
| CN204922200U (en) | High pressure isolating valve structure | |
| CN205559843U (en) | High platform filler closing device of ball valve | |
| CN103939447A (en) | Double-seal bolt | |
| CN204592490U (en) | Valve gap | |
| CN210239704U (en) | Two rubber sealing device of pipe jacking construction entrance to a cave of easily changing | |
| CN204572435U (en) | The sealing configuration of water pump joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |