CN204300374U - Piston effect self sealss Quick-opening sealing structure - Google Patents
Piston effect self sealss Quick-opening sealing structure Download PDFInfo
- Publication number
- CN204300374U CN204300374U CN201420740833.7U CN201420740833U CN204300374U CN 204300374 U CN204300374 U CN 204300374U CN 201420740833 U CN201420740833 U CN 201420740833U CN 204300374 U CN204300374 U CN 204300374U
- Authority
- CN
- China
- Prior art keywords
- operating valve
- quick operating
- quick
- type circle
- type
- 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
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model provides a kind of piston effect self sealss Quick-opening sealing structure, there is valve body and quick operating valve, it is characterized in that: the inner surface of valve end has a ring-shaped step structure, a piston packing is embedded at ring-shaped step structure place, plane O type circle is embedded with between the bottom surface of piston packing and the bottom surface of ledge structure, there is between the bottom surface of piston packing and the bottom surface of ledge structure entrance pressure passage, the runner of entrance pressure expanding channels plane O type circle and valve body, quick operating valve O type circle is embedded with in O type ring recess set by the end face of quick operating valve, quick operating valve O type circle position corresponds to piston packing, the diameter of above-mentioned plane O type circle is greater than the diameter of quick operating valve O type circle.The self sealss that the utility model can realize utilizing piston effect to reach, anti-block, prevent sealing ring from coming off, open and close easily, the object of good sealing effect.
Description
Technical field
The utility model relates to invention Quick-opening sealing structure, particularly relates to a kind of frame for movement of the pipe cleaning valve on oil, natural gas line or the sealing of the quick operating valve on fast opening blind.
Background technology
Known quick operating valve Sealing Technology has following two kinds:
The first structure: pipe cleaning valve Quick-opening sealing structure adopts radial direction or the end face O type circle hermetically-sealed construction of standard usually.
The second structure: the self-fastening sealing structure of pipe cleaning valve quick operating valve, forming by assembling O type circle in quick operating valve end face groove, it is characterized in that: O type circle is arranged in the groove on quick operating valve inner surface, being distributed with the tracting pressuring hole communicated with quick operating valve inner chamber in groove.
But two kinds of technology have suitable defective, and the first mainly contains following shortcoming:
1, quick operating valve O type circle is in cross section is in the groove of rectangle, easily comes off, lose sealing after long-term keying.
2, operate frictional resistance when quick operating valve pushes or rotate to precalculated position comparatively large, open and close effort.
3, reducing quick operating valve O type circle initial sealing power for reducing keying moment, just likely causing valve cavity pressure to pass the lower position of initial sealing power, to such an extent as to causing leakage.
The second mainly contains following shortcoming:
1, O type ring recess directly processes on quick operating valve, and the machining accuracy of its groove is difficult to ensure, groove shape is difficult to control, and O type circle thus can be caused to fill not enter or be loaded into rear caducous situation.
2, utilize quick operating valve groove structure and tracting pressuring hole impulse, but its essence is that quick operating valve groove structure is meaningless, and tracting pressuring hole is easily by filter medium clogging.
3, realize self-tightening sealing by means of only O type circle, itself does not possess self-tightening sealing function, is only to realize simple plane O type circle sealing function.
Utility model content
The utility model provides a kind of piston effect self sealss Quick-opening sealing structure, its objective is the shortcoming overcoming above prior art, proposes and can utilize piston effect, reach and realize self-packing Quick-opening sealing structure.
The technical solution of the utility model is:
A kind of piston effect self sealss Quick-opening sealing structure, there is valve body and quick operating valve, it is characterized in that: the inner surface of the end of valve body has a ring-shaped step structure, a piston packing is embedded at ring-shaped step structure place, plane O type circle is embedded with between the bottom surface of piston packing and the bottom surface of ledge structure, there is between the bottom surface of piston packing and the bottom surface of ledge structure entrance pressure passage, the runner of entrance pressure expanding channels plane O type circle and valve body, quick operating valve O type circle is embedded with in O type ring recess set by the end face of quick operating valve, quick operating valve O type circle position corresponds to piston packing, the diameter of above-mentioned plane O type circle is greater than the diameter of quick operating valve O type circle.
Described ring-shaped step structure is a second order ledge structure, the cross section of piston packing is L-type and is embedded on second order ledge structure, the bottom surface of described ledge structure is the first stage terrace of ledge structure, plane O type circle is positioned at the first stage terrace place of ledge structure, and it is that the annular of V-type rushes down slag chute that the second-order step surface of ledge structure and piston packing end face corresponding with it form a cross section.
Described ring-shaped step structure is a second order ledge structure, the cross section of piston packing is L-type and is embedded on second order ledge structure, the circle body that piston packing is corresponding with the sidewall of second-order step is provided with several screw hole the even cloth of circumference, there is anti-loosing screw and pass screw hole and be arranged in screw set on the sidewall of second-order step; The diameter of screw hole is greater than the diameter of the anti-loosing screw head being arranged in screw hole.
Quick operating valve O type circle is embedded in the O type ring recess set by the end face of quick operating valve, and the top of O type ring recess has the peak structure of the projection that direction is stretched out in O type ring recess, and peak structure pushes down quick operating valve O type circle.
The end face of quick operating valve is provided with step surface, a side being installed in the quick operating valve gland on the end face of quick operating valve and step surface define the O type ring recess being embedded quick operating valve O type circle, and the top, side of quick operating valve gland has the peak structure of the projection that direction is stretched out in O type ring recess.
The beneficial effects of the utility model are:
1, piston packing utilizes piston effect to form reliably self sealss.
2, rush down slag chute when can make have the grains of sand or other graininess medium in medium, prevent medium from entering hermetically-sealed construction, effectively ensure that quick operating valve is not stuck.
3, anti-loosing screw is while ensureing that piston packing has certain displacement (ensureing the formation of piston effect), can prevent piston packing from coming off.
4, quick operating valve gland design has independently peak structure, and selects different corrosion resistant gland materia according to different media.This measure effectively prevents the corrosion of peak location, ensure that the fixation of spike to O type circle, the gland comprising spike can be ensured processing dimension accuracy as individual part, thus ensure the tension active of the effective magnitude of interference of quick operating valve O type circle, quick operating valve O type circle, reach the object ensureing quick operating valve sealing, simultaneously also more convenient to the replacing of quick operating valve O type circle.
5, operate frictional resistance when quick operating valve pushes or rotate to precalculated position less, open and close easily.
Accompanying drawing explanation
Fig. 1: the utility model structural representation;
The A portion enlarged drawing of Fig. 2: Fig. 1;
The B portion enlarged drawing of Fig. 3: Fig. 2.
In figure: 1: quick operating valve, 2: quick operating valve gland, 3: bolt, 4: piston packing, 5: rush down slag chute, 6: valve body, 7: entrance pressure passage, 8: anti-loosing screw, 9: plane O type circle, 10: radial O type circle, 11: quick operating valve O type circle, 12: runner, 21: spike, 22:O type ring recess, 41: the bottom surface, 42 of piston packing: the end face of piston packing, 61: the first stage terraces, 62: second-order step surface, 81: screw hole.
Detailed description of the invention:
As shown in Figure 1:
The quick operating valve 1 that the utility model has valve body 6 and coordinates with valve body 6.
A depressed part has been established and forming station terrace in the middle part of the end face of quick operating valve 1, an annular quick operating valve gland 2 is installed in depressed part with bolt 3, the side of quick operating valve gland 2 and step surface just define the O type ring recess 22 for being embedded quick operating valve O type circle 11, as shown in Figure 3, the top, side of quick operating valve gland 2 has spike 21 structure of the projection that direction is stretched out in O type ring recess 22, is also the bulge-structure that the top, side of quick operating valve gland 2 has a circle outside.The quick operating valve O type circle 11 be embedded like this in O type ring recess 22 will be pushed down by spike 21.
Offer small one and large one two loop configuration of diameter at the inner surface of valve body 6 and form an annular second order ledge structure, larger-diameter loop configuration is the first stage rank, its bottom surface is the first stage terrace 61, its side is the sidewall on the first stage rank, the loop configuration of small diameter is second-order step, its bottom surface is second-order step surface 62, and its side is the sidewall of second-order step.
The cross section of piston packing 4 is L-type, coordinates and is embedded on above-mentioned second order ledge structure.
The part that piston packing 4 coordinates with the first stage rank, is embedded with radial O type circle 10 in the interface of the sidewall of piston packing 4 and the sidewall on the first stage rank, is embedded with plane O type circle 9 in the bottom surface 41 of piston packing and the first stage terrace 61 interface.
The diameter of plane O type circle 9 is greater than the diameter of quick operating valve O type circle 11.
The circle body that piston packing 4 is corresponding with the sidewall of second-order step is provided with several (three or more) screw hole 81 the even cloth of circumference, and having anti-loosing screw 8 through screw hole 81 to be arranged in screw set on the sidewall of second-order step thus fixed piston sealing ring 4; The diameter of screw hole 81 is greater than the diameter of the anti-loosing screw head being arranged in screw hole 81, and the gap between the anti-loosing screw head produced like this and screw hole 81 ensures that piston packing 4 has certain displacement.
Between the bottom surface 41 of piston packing and the first stage terrace 61, there is entrance pressure passage 7, entrance pressure passage 7 connects the runner 12 of plane O type circle 11 and valve body 6, in the present embodiment be piston packing bottom surface 41 not with the first stage terrace 61 contact, gap between the bottom surface 41 of piston packing and the first stage terrace 61 becomes entrance pressure passage 7, and this entrance pressure passage 7 is communicated with screw hole 81, thus entrance pressure passage 7 connects the runner 12 of plane O type circle 11 and valve body 6.
As shown in Figure 2, the second-order step surface 62 of ledge structure and the end face 42 of piston packing corresponding are with it all in skewed, thus the annular that formation cross section is V-type rushes down slag chute 5.
Utility model works principle:
As Fig. 1: when medium enters in the runner 12 of pipe cleaning valve quick operating valve body, pressure medium acts on piston packing 4 because medium enters from entrance pressure passage 7, and pressure medium acts on quick operating valve 1, diameter due to plane O type circle 9 is greater than the diameter of quick operating valve O type circle 11, the annulus area S that the potted line of the plane O type circle 9 on piston packing 4 and runner 12 are formed
1, than the annulus area S that potted line and the runner 12 of quick operating valve O type circle 11 are formed
2greatly, after pressure enters, utilize Δ S=S
1-S
2the difference in areas formed, forms piston effect.When the pressure was increased, piston packing 4 moves to quick operating valve 1 direction, compressing quick operating valve O type circle 11, and form thrust and be adjacent to quick operating valve 1, along with the change of pressure, quick operating valve O type circle 11 can regulate the degree of being adjacent to sealing ring automatically, ensures positiver sealing; S
1and S
2can according to different pressures grade accurate Calculation, finally ensure that this difference in areas Δ S is arranged in rational scope, realize reliable self sealss with quick operating valve under guaranteeing different pressures rating conditions.
When bore is greater than DN500, due to when taking out wiper, sealing ring may be hauled out by the wiper being attached with a large amount of dirt, increase anti-loosing screw 8, prevent piston packing 4 from coming off while guaranteeing to produce the displacement needed for piston effect.
As Fig. 2: assemble rear formation by piston packing 4 and valve body 6 and rush down slag chute 5; when having the grains of sand or other graininess medium in medium; can be deposited on and rush down in slag chute 5; after pressure medium disappears; piston packing 4 moves up; the impurity rushed down in slag chute 5 can be extruded, effectively prevent medium from entering hermetically-sealed construction, ensure that quick operating valve 1 is not stuck.
As Fig. 3: it is one of modal mode of quick operating valve seal failure that quick operating valve O type circle 11 comes off, the key preventing quick operating valve O type circle 11 from coming off is the spike 21 on quick operating valve gland 2.Under major part service condition, the material of quick operating valve 1 is consistent with the material of valve body 6 is carbon steel, if spike 21 is an one-piece parts with quick operating valve 1, so spike 21 will be easy to be corroded, therefore devise quick operating valve gland 2, and select different corrosion resistant gland materia according to different media.This measure effectively prevents the corrosion of spike 21 position, ensure that the fixation of spike 21 pairs of quick operating valve O type circles 11.
The utility model utilizes piston effect can effectively realize self sealss, anti-block, and can prevent piston packing 4 from coming off, independent spike 21 structure of quick operating valve 1 ensures that quick operating valve O type circle 11 keeps certain tension active while can not coming off simultaneously, and form initial sealing, when operation quick operating valve 1 pushes or rotate to precalculated position, frictional resistance is less, open and close easily, good sealing effect.
Replacement scheme:
For the utility model, a lot of modification and improvement can also be made according to invention spirit of the present utility model and principle, as the change of the implementation of piston effect, the change of fast opening blind sealing, screw hole structure change deltiod into or act on identical other shapes etc., but these modification and improve the scope of the claims all belonging to the utility model and apply for.
Claims (5)
1. a piston effect self sealss Quick-opening sealing structure, there is valve body and quick operating valve, it is characterized in that: the inner surface of the end of valve body has a ring-shaped step structure, a piston packing is embedded at ring-shaped step structure place, plane O type circle is embedded with between the bottom surface of piston packing and the bottom surface of ledge structure, there is between the bottom surface of piston packing and the bottom surface of ledge structure entrance pressure passage, the runner of entrance pressure expanding channels plane O type circle and valve body, quick operating valve O type circle is embedded with in O type ring recess set by the end face of quick operating valve, quick operating valve O type circle position corresponds to piston packing, the diameter of above-mentioned plane O type circle is greater than the diameter of quick operating valve O type circle.
2. piston effect self sealss Quick-opening sealing structure as claimed in claim 1, it is characterized in that: above-mentioned ring-shaped step structure is a second order ledge structure, the cross section of piston packing is L-type and is embedded on second order ledge structure, the bottom surface of described ledge structure is the first stage terrace of ledge structure, plane O type circle is positioned at the first stage terrace place of ledge structure, and it is that the annular of V-type rushes down slag chute that the second-order step surface of ledge structure and piston packing end face corresponding with it form a cross section.
3. piston effect self sealss Quick-opening sealing structure as claimed in claim 1, it is characterized in that: above-mentioned ring-shaped step structure is a second order ledge structure, the cross section of piston packing is L-type and is embedded on second order ledge structure, the circle body that piston packing is corresponding with the sidewall of second-order step is provided with several screw hole the even cloth of circumference, there is anti-loosing screw and pass screw hole and be arranged in screw set on the sidewall of second-order step; The diameter of screw hole is greater than the diameter of the anti-loosing screw head being arranged in screw hole.
4. piston effect self sealss Quick-opening sealing structure as claimed in claim 1, it is characterized in that: quick operating valve O type circle is embedded in the O type ring recess set by the end face of quick operating valve, the top of O type ring recess has the peak structure of the projection that direction is stretched out in O type ring recess, and peak structure pushes down quick operating valve O type circle.
5. piston effect self sealss Quick-opening sealing structure as claimed in claim 4, it is characterized in that: the end face of quick operating valve is provided with step surface, a side being installed in the quick operating valve gland on the end face of quick operating valve and step surface define the O type ring recess being embedded quick operating valve O type circle, and the top, side of quick operating valve gland has the peak structure of the projection that direction is stretched out in O type ring recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740833.7U CN204300374U (en) | 2014-12-01 | 2014-12-01 | Piston effect self sealss Quick-opening sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740833.7U CN204300374U (en) | 2014-12-01 | 2014-12-01 | Piston effect self sealss Quick-opening sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204300374U true CN204300374U (en) | 2015-04-29 |
Family
ID=53105915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420740833.7U Active CN204300374U (en) | 2014-12-01 | 2014-12-01 | Piston effect self sealss Quick-opening sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204300374U (en) |
-
2014
- 2014-12-01 CN CN201420740833.7U patent/CN204300374U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203453501U (en) | Soft and hard dual-valve-port stop valve | |
| CN202646742U (en) | High-pressure accumulation-proof throttling stop valve | |
| CN204300374U (en) | Piston effect self sealss Quick-opening sealing structure | |
| CN104696585A (en) | Multi-protection corrugated pipe stop valve for chlorine | |
| CN106641320B (en) | Valve rod sealing structure of underwater ball valve | |
| CN203453513U (en) | Novel external balance stop valve | |
| CN201265689Y (en) | Abrasion-proof slag-discharging valve | |
| CN209743630U (en) | flat gate valve with composite sealing valve seat structure | |
| CN204961893U (en) | Special ball valve of silica flour tail gas | |
| CN107100997B (en) | Lip-shaped sealing ring and plug valve thereof | |
| CN204201128U (en) | A kind of valve seat construction of synthetic gas butterfly valve | |
| CN203730778U (en) | Novel oil-gas throttle valve | |
| CN211624277U (en) | Improved high-performance ball valve | |
| CN206754387U (en) | A kind of improved high-voltage needle-valve | |
| CN205781266U (en) | Valve rod with removable seal set | |
| CN201723755U (en) | Flat gate valve for forge welding | |
| CN203836197U (en) | Sealing ring with openings | |
| CN204677785U (en) | A kind of valve plate of three eccentricity hard seal butterfly valve and valve seal cooperating structure | |
| CN206495816U (en) | A kind of mechanical seal for pump suitable for the highly crystalline station of high solids | |
| CN203131060U (en) | High-pressure corrugated pipe ball core cut-off valve | |
| CN206017748U (en) | Regulating valve special for chlorine | |
| CN201496604U (en) | Composite sealing ball valve | |
| CN202597741U (en) | Sealing component for external refining vacuum hopper | |
| CN210218697U (en) | Self-sealing balance stop valve | |
| CN204114265U (en) | With the reduction valve of stop valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |