CN103195925A - Venthole plugging device - Google Patents
Venthole plugging device Download PDFInfo
- Publication number
- CN103195925A CN103195925A CN2013100057575A CN201310005757A CN103195925A CN 103195925 A CN103195925 A CN 103195925A CN 2013100057575 A CN2013100057575 A CN 2013100057575A CN 201310005757 A CN201310005757 A CN 201310005757A CN 103195925 A CN103195925 A CN 103195925A
- Authority
- CN
- China
- Prior art keywords
- cam
- periphery
- bulge loop
- stretching
- annular groove
- 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.)
- Granted
Links
Images
Landscapes
- Sealing Devices (AREA)
Abstract
The invention relates to a venthole plugging device which overcomes the defect that a seal ring is used for sealing in the prior art but is not suitable for being used in a frequent plugging test. The venthole plugging device comprises an elastic body and a stretching rod penetrating through the elastic body, wherein a cam mechanism is fixed at the upper end part of the stretching rod; a penetration hole is formed in the center of the elastic body; the stretching rod penetrates through the penetration hole; at least one bellied convex ring is arranged on the circumference of the stretching rod; the outside diameters of the convex rings are greater than the inside diameter of the penetration hole; and ring grooves matched with the convex rings are formed in the inner wall of the penetration hole. The convex rings budge out the elastic body to form raised sealing rings on the circumferential surface of the elastic body; after the elastic body is inserted in a venthole, the sealing rings are contacted with and pressed against the inner wall of the venthole to form sealing; and as the axial lengths of the convex rings are smaller than that of the elastic body, the raised sealing rings on the circumference of the elastic body are relatively uniform, and the cross sections at all parts of each sealing ring have the same size, the sealing rings are well contacted with the inner wall of the venthole, and the air tightness is good.
Description
Technical field
The present invention relates to a kind of seal arrangement, especially a kind of good sealing effect, the fireballing vent blocking device of shutoff.
Background technique
The general seal arrangement that uses is seal ring, self elasticity by seal ring realizes sealing, but seal ring generally all is to use in fixed occasion, when vent needs frequent the unlatching, use seal ring to cause ring wear easily as seal arrangement, perhaps cause seal ring to peel off from Sealing, influence final sealing effect.Seal ring belongs to drive fit or interference fit, and in frequent process of opening, seal ring is torn easily, and the sealing means of this frequent unlatching do not match with the normal operation mode of seal ring yet, therefore the operating life of shortening seal ring that can be rapid.
Use in some leakage tests or the product performance test, need to carry out the hermetic seal test after finishing as speed changer assembling, for guaranteeing the accuracy of test, to carry out shutoff to vent, if adopt automatic shutoff equipment cost than higher, consider that in the speed changer research and development trial assembly stage cost problem can not be equipped with so special-purpose water-tight equipment, and this equipment interoperability is not strong yet.If adopt artificial shutoff, maximum may just be to use seal ring, but is to use seal ring to be difficult to the long-term quality that guarantees shutoff, can influence the effect of air tightness test.
Patent Office of the People's Republic of China has announced a CN102313631A document on January 11st, 2012, name is called a kind of sealing plug and method of trying the water thereof of trying the water, comprise housing, cam, handle, expansion mechanism, preceding back-up ring and seal ring, two cam contact surfaces that the distance to the cam center of rotation that all arcs connects of having cam does not wait, the cam rotatingshaft connects handle and expansion mechanism, expansion mechanism is made of expander and expanding block, the ladder outer surface of expanding block has groove, extension spring places in this groove and with the expanding block card and ties up on expander, expander and expanding block are conical contact, and the movement by taper struts expanding block and seals.But the expanding block outside is subjected to the restriction of extension spring, and expansion effect is bad, does not reach sealing effect.
Patent Office of the People's Republic of China has announced a CN202417394U patent on September 5th, 2012, name is called a kind of adjustable well head plugging device, the upper end of round-meshed truncated cone shape expander be with externally threaded relief tube to link together, the cylinder type clamping sleeve links together by connecting swivel nut and relief tube, the internal diameter of clamping sleeve is greater than the upper end radius of expander, clamping sleeve top also is provided with several thrusts that has pin-and-hole, and the top pawl is housed in the pin-and-hole, the cylinder type rubber sealing boot is housed below the clamping sleeve.Expander is up, compresses the well head inwall and carries out shutoff thereby stuffing box gland strutted.But the periphery of stuffing box gland is cylinder, and strutting back cylinder and well head inwall, to contact sealing relatively poor, and the wall thickness difference of stuffing box gland, and the position that thickness is big struts weak effect, causes the position of sealing to be in the little position of stuffing box gland thickness, also can reduce sealing effect.
Summary of the invention
The invention solves and use seal ring to seal in the prior art, but be not suitable for using the defective in the test of frequent plug, a kind of vent blocking device is provided, expanding by the extruding elastomer seals, and is suitable in the test of frequent plug.
The present invention has solved also that the periphery of expander is cylinder in the prior art, causes the contact sealing relatively poor, has the defective of gas leakage, and a kind of vent blocking device is provided, by forming the bulge loop of heaving at outer circumferential face, and the contact good airproof performance, sealing effect is better.
The present invention has also solved in the prior art expander and has just formed sealing together in periphery, and the cylinder back of expanding forms sealing, the defective that sealing effect is relatively poor, a kind of vent blocking device is provided, form the bulge loop that multiple tracks is heaved in elastomeric periphery, form multiple-sealed, good sealing effect.
The technical solution adopted for the present invention to solve the technical problems is: a kind of vent blocking device, comprise that an elastomer, penetrates elastomeric stretching bar, fixedly there is a cam mechanism upper end portion of stretching bar, be provided with perforation in the middle of the elastomer, the stretching bar passes perforation, the periphery of stretching bar is provided with the bulge loop of heaving at least together, and the external diameter of bulge loop is greater than the internal diameter of perforation, and the inwall of perforation is provided with the annular groove that matches with bulge loop.The bulge loop jack-up that elastomer is heaved forms the seal ring of a circle projection at elastomeric outer surface, after elastomer is inserted in the vent, seal ring and vent inwall contact and push and form sealing, bulge loop length in the axial direction is less than elastomeric length, the seal ring of projection is more even on the elastomer periphery, seal ring sectional dimension everywhere is identical, so seal ring contacts well good airproof performance with the vent inwall; Mobile in perforation by the stretching bar, bulge loop moves relative to annular groove, thereby make elastomer periphery cylinder maintain the original state or projection, realize Spielpassung and extruding interference fit between elastomer and the vent inwall, Spielpassung makes things convenient for blocking device to be inserted in the vent or extracts, and interference fit realizes sealing.
As preferably, elastomeric periphery is the cylndrical surface, and the external diameter of stretching bar and the external diameter of perforation are suitable, the cross section semicircular in shape of bulge loop, and the cross section of annular groove is rectangular.The seal ring that forms projection in the cylndrical surface contacts well with the vent inwall, good airproof performance, bulge loop is semicircle, make bulge loop enter annular groove or deviate from the annular groove more smooth, while makes that also the seal ring of projection and vent inwall are that line contacts through extruding increase area of contact, improve sealing, also can adopt other sectional shape, such as trapezoidal.
As preferably, cam mechanism comprises with the hinged cam of stretching boom end and is fixed on handle on the cam, and the periphery of cam is circular, and stretching bar off-centre is hinged on the cam, and handle is fixed on the periphery of cam.The handle rotating cam, the eccentric hinged stretching bar of cam pulling, thus bulge loop is heaved elastomer, after cam forwarded the position to, formation was locked, and prevented that cam from turning round automatically.
As preferably, the bulge loop on the periphery of stretching bar is 2 roads or 3 roads, and corresponding annular groove also is 2 roads or 3 roads, and bulge loop equates with spacing between the bulge loop.The multiple tracks bulge loop with can form multiple-sealed ring at elastomer periphery cylinder after annular groove cooperates, seal ring contact with the vent inwall back form multiple-sealed, the effect of energy enhanced leaktightness like this, generally seal ring 2-3 road can satisfy effect.
As preferably, the position of the corresponding annular groove of elastomeric periphery is provided with the shirt rim, and the thickness of the most peripheral of shirt rim is greater than the thickness of intermediate portion, shirt rim, and the shirt rim is concave arc surface towards a side of stretching bar underpart.Elastomer is squeezed when heaving, and the generation deflection can be expanded in the shirt rim, the especially existence of concave arc surface, and under the effect of air-flow, the most peripheral of shirt rim is forced into the vent inwall after the deflection of shirt rim, and air-flow self can provide the active force of sealing, strengthens sealing effect.
As preferably, the annular groove of perforation inwall is stepped, the diameter difference of the annular groove at different ladders place, and each ladder of bulge loop and annular groove cooperates and forms multiple extrusion expansion structure.Annular groove is stepped, and the different ladder position of bulge loop and annular groove cooperates and can form heaving of different heights at elastomer periphery cylinder, thereby produces different squeezing effects, also adapts to the seal request of different vents.
As preferably, cam mechanism comprises with the hinged cam of stretching boom end and is fixed on handle on the cam, the periphery of the cam shape that to be straight flange link to each other at interval with the arc limit, each section straight flange is different to the distance of stretching bar hinge point, a ladder of the equal corresponding annular groove of each section straight flange of cam periphery, handle is fixed on the periphery of cam.Cooperation between the different ladders of bulge loop and annular groove is to rest on different straight flanges by handle drive cam to embody.
As preferably, the end of stretching bar is the retaining head, and the diameter of retaining head is greater than the diameter of stretching bar, and the diameter of retaining head is greater than the diameter of perforation.Retaining head can prevent that elastomer from separating with the stretching bar automatically, when especially blocking device being withdrawed from the vent.
As preferably, be equipped with pad on the stretching bar, pad is between elastomer and the cam.Pad makes an elastomeric end limited post stretching bar and elastomer produce and relatively moves.
As preferably, elastomeric periphery is wavy surface, and the position of the trough respective slot of wave, and elastomer is heaved the position that forms seal ring in the position of crest just in time corresponding bulge loop.
The invention has the beneficial effects as follows: the bulge loop jack-up that elastomer is heaved forms the seal ring of a circle projection at elastomeric outer surface, after elastomer is inserted in the vent, seal ring and vent inwall contact and push and form sealing, bulge loop length in the axial direction is less than elastomeric length, the seal ring of projection is more even on the elastomer periphery, seal ring sectional dimension everywhere is identical, so seal ring contacts well good airproof performance with the vent inwall.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the sealing schematic representation of the present invention's structure shown in Figure 1;
Fig. 3 is second kind of structural representation of the present invention;
Fig. 4 is the sealing schematic representation of the present invention's structure shown in Figure 3;
Fig. 5 is the sealing schematic representation of the third structure of the present invention;
Fig. 6 is the 4th kind of structural representation of the present invention;
Among the figure: 1, handle, 2, cam, 3, bearing pin, 4, pad, 5, elastomer, 6, the stretching bar, 7, bulge loop, 8, annular groove, 9, the retaining head, 10, seal ring, 11, the shirt rim, 12, concave arc surface, 13, straight flange, 14, the arc limit.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment 1: a kind of vent blocking device (referring to accompanying drawing 1), comprise that an elastomer 5, penetrates elastomeric stretching bar 6, fixedly there is a cam mechanism upper end portion of stretching bar, is equipped with pad 4 on the stretching bar, and pad is between elastomer and the cam mechanism.Elastomeric periphery is the cylndrical surface, is provided with perforation in the middle of the elastomer, and the stretching bar passes perforation, and the external diameter of stretching bar and the external diameter of perforation are suitable.The inwall of perforation is provided with the annular groove 8 of one indent, and the periphery of stretching bar is provided with the bulge loop of heaving together 7, the cross section semicircular in shape of bulge loop, and the cross section of annular groove is rectangular.The maximum diameter of bulge loop is greater than the diameter of perforation, and fixedly there is retaining 9 lower end of stretching bar, and the diameter of retaining head is greater than the diameter of boring a hole.Cam mechanism comprises with the hinged cam 2 of stretching boom end and is fixed on handle 1 on the cam, and the periphery of cam is circular, and the stretching bar is hinged on the cam by bearing pin 3 off-centre, and handle is fixed on the periphery of cam.
Blocking device is inserted in the vent, follows swing handle, cam rotates around the center of circle of cam, and bearing pin drives the throw of eccentric of moving twice on the stretching bar, and pad stops that elastomer moves, and makes to produce between elastomer and the stretching bar to relatively move.Bulge loop on the stretching bar is deviate from the annular groove and is pushed elastomer, make and form the seal ring 10(of projection referring to accompanying drawing 2 on the cylndrical surface of elastomer periphery), the height of projection of seal ring is decided according to the height of bulge loop, seal ring and vent inwall contact and form extruding, thereby finish the vent shutoff.When needs were removed blocking device, with the handle backswing, the stretching bar resetted.Because elastomer pushes mutually with the vent inwall, the bar that therefore stretches is mobile in perforation, and bulge loop is in the position of annular groove again, and restore elastomeric periphery cylndrical surface, and blocking device can be extracted in vent.
Embodiment 2: a kind of vent blocking device (referring to accompanying drawing 3 accompanying drawings 4), be provided with 2 road annular grooves 8 in the elastomeric perforation, and the distance between the annular groove is greater than the throw of eccentric of twice, and the stretching bar is provided with 2 corresponding road bulge loops 7.Break active handle off with the fingers and thumb, the bulge loop extruding elastomer of stretching bar periphery forms 2 road seal rings 10 in elastomer periphery cylndrical surface, can form the two seals position during elastomer shutoff vent, has therefore improved sealing effect.All the other structures are with reference to embodiment 1.
Embodiment 3: a kind of vent blocking device (referring to accompanying drawing 5), the position of the corresponding annular groove of elastomeric periphery is provided with shirt rim 11, the thickness of the most peripheral of shirt rim is greater than the thickness of intermediate portion, shirt rim, and the shirt rim is concave arc surface 12 towards a side of stretching bar underpart.Elastomer is subjected to bulge loop and pushes when heaving, the generation deflection can be expanded in the shirt rim, especially the existence of concave arc surface, the shirt rim can be towards the direction deflection of retaining head, after the deflection under the effect of air-flow, the most peripheral of shirt rim is forced into the vent inwall, and air-flow self can provide the active force of sealing, strengthens sealing effect.All the other structures are with reference to embodiment 1.
Embodiment 4: a kind of vent blocking device (referring to accompanying drawing 6), and the annular groove 8 of perforation inwall is stepped, and each annular groove has two ladders, and the height of bulge loop is greater than the degree of depth of the annular groove of maximum diameter.Cam mechanism comprises with the hinged cam 2 of stretching boom end and is fixed on handle 1 on the cam, the periphery of cam is the shape that straight flange 13 links to each other with 14 intervals, arc limit, each section straight flange is different to the distance of stretching bar hinge point, a ladder of the equal corresponding annular groove of each section straight flange of cam periphery, handle is fixed on the periphery of cam.All the other structures are with reference to embodiment 1.
Handle drives cam and rotates, when cam turns to the first road straight flange, bulge loop on the stretching bar enters on second ladder of annular groove, produce one seal ring 10 this moment in elastomeric periphery cylndrical surface, the height of seal ring is the degree of depth poor at the height of bulge loop and this ladder place, and can finish the vent shutoff this moment.
If the height deficiency of seal ring, then follow rotating cam, make cam forward the second road straight flange to, the inwall of the bulge loop extruding elastomer perforation of stretching bar, produce seal ring in elastomer periphery cylndrical surface, the height of seal ring is gap poor between the height of bulge loop and stretching bar and the perforation, and this moment, the height of seal ring was greater than the height that cam is in the seal ring that produces on the first road straight flange.At this moment seal ring can the big vent of shutoff diameter.
Above-described embodiment is several preferred version of the present invention, is not the present invention is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technological scheme that claim puts down in writing.
Claims (10)
1. vent blocking device, comprise that an elastomer, penetrates elastomeric stretching bar, fixedly there is a cam mechanism upper end portion of stretching bar, it is characterized in that being provided with perforation in the middle of the elastomer, the stretching bar passes perforation, the periphery of stretching bar is provided with the bulge loop of heaving at least together, and the external diameter of bulge loop is greater than the internal diameter of perforation, and the inwall of perforation is provided with the annular groove that matches with bulge loop.
2. vent blocking device according to claim 1 is characterized in that elastomeric periphery is the cylndrical surface, and the external diameter of stretching bar and the external diameter of perforation are suitable, the cross section semicircular in shape of bulge loop, and the cross section of annular groove is rectangular.
3. vent blocking device according to claim 1, it is characterized in that cam mechanism comprises with the hinged cam of stretching boom end and is fixed on handle on the cam, the periphery of cam is circular, and stretching bar off-centre is hinged on the cam, and handle is fixed on the periphery of cam.
4. according to claim 1 or 2 or 3 described vent blocking devices, the bulge loop on the periphery of the bar that it is characterized in that stretching is 2 roads or 3 roads, and corresponding annular groove also is 2 roads or 3 roads, and bulge loop equates with spacing between the bulge loop.
5. vent blocking device according to claim 4, the position that it is characterized in that the corresponding annular groove of elastomeric periphery is provided with the shirt rim, the thickness of the most peripheral of shirt rim is greater than the thickness of intermediate portion, shirt rim, and the shirt rim is concave arc surface towards a side of stretching bar underpart.
6. vent blocking device according to claim 1 and 2, the annular groove of the inwall that it is characterized in that boring a hole is stepped, the diameter difference of the annular groove at different ladders place, each ladder of bulge loop and annular groove cooperates and forms multiple extrusion expansion structure.
7. vent blocking device according to claim 6, it is characterized in that cam mechanism comprises with the hinged cam of stretching boom end and is fixed on handle on the cam, the periphery of the cam shape that to be straight flange link to each other at interval with the arc limit, each section straight flange is different to the distance of stretching bar hinge point, a ladder of the equal corresponding annular groove of each section straight flange of cam periphery, handle is fixed on the periphery of cam.
8. vent blocking device according to claim 1, the end of the bar that it is characterized in that stretching is the retaining head, and the diameter of retaining head is greater than the diameter of stretching bar, and the diameter of retaining head is greater than the diameter of perforation.
9. according to claim 1 or 2 or 8 described vent blocking devices, be equipped with pad on the bar that it is characterized in that stretching, pad is between elastomer and the cam.
10. vent blocking device according to claim 1 is characterized in that elastomeric periphery is wavy surface, and the position of the trough respective slot of wave, and elastomer is heaved the position that forms seal ring in the position of crest just in time corresponding bulge loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005757.5A CN103195925B (en) | 2013-01-07 | 2013-01-07 | Vent blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005757.5A CN103195925B (en) | 2013-01-07 | 2013-01-07 | Vent blocking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195925A true CN103195925A (en) | 2013-07-10 |
| CN103195925B CN103195925B (en) | 2015-10-14 |
Family
ID=48718654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310005757.5A Active CN103195925B (en) | 2013-01-07 | 2013-01-07 | Vent blocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103195925B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759006A (en) * | 2014-01-27 | 2014-04-30 | 安徽江淮汽车股份有限公司 | Internal expansion plugging device for cam shaft hole |
| CN104948736A (en) * | 2014-03-26 | 2015-09-30 | 福特全球技术公司 | Sealing device |
| CN105697186A (en) * | 2016-01-14 | 2016-06-22 | 安徽江淮汽车股份有限公司 | Sealing device for oil level gauge hole of engine |
| CN112440114A (en) * | 2019-09-05 | 2021-03-05 | 中国科学院沈阳自动化研究所 | Material-increasing and material-decreasing composite manufacturing process equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5774634A (en) * | 1980-10-28 | 1982-05-10 | Toyoda Gosei Co Ltd | Seal device for pressure leak testing |
| DE3718619A1 (en) * | 1987-06-03 | 1988-12-22 | Thyssen Polymer Gmbh | Closure plug |
| US5095738A (en) * | 1991-02-25 | 1992-03-17 | Irontite Products Co., Inc. | Internal combustion engine head leak tester |
| CN101986120A (en) * | 2010-11-01 | 2011-03-16 | 力帆实业(集团)股份有限公司 | Engine airtight detection rapid plugging head |
| CN201858352U (en) * | 2010-11-01 | 2011-06-08 | 力帆实业(集团)股份有限公司 | Plugging head structure |
| CN102359598A (en) * | 2011-06-28 | 2012-02-22 | 东风（十堰）底盘部件有限公司 | Plug |
| CN202350988U (en) * | 2011-12-07 | 2012-07-25 | 宁波路润冷却器制造有限公司 | Auxiliary device for detecting air tightness of shell |
-
2013
- 2013-01-07 CN CN201310005757.5A patent/CN103195925B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5774634A (en) * | 1980-10-28 | 1982-05-10 | Toyoda Gosei Co Ltd | Seal device for pressure leak testing |
| DE3718619A1 (en) * | 1987-06-03 | 1988-12-22 | Thyssen Polymer Gmbh | Closure plug |
| US5095738A (en) * | 1991-02-25 | 1992-03-17 | Irontite Products Co., Inc. | Internal combustion engine head leak tester |
| CN101986120A (en) * | 2010-11-01 | 2011-03-16 | 力帆实业(集团)股份有限公司 | Engine airtight detection rapid plugging head |
| CN201858352U (en) * | 2010-11-01 | 2011-06-08 | 力帆实业(集团)股份有限公司 | Plugging head structure |
| CN102359598A (en) * | 2011-06-28 | 2012-02-22 | 东风（十堰）底盘部件有限公司 | Plug |
| CN202350988U (en) * | 2011-12-07 | 2012-07-25 | 宁波路润冷却器制造有限公司 | Auxiliary device for detecting air tightness of shell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759006A (en) * | 2014-01-27 | 2014-04-30 | 安徽江淮汽车股份有限公司 | Internal expansion plugging device for cam shaft hole |
| CN104948736A (en) * | 2014-03-26 | 2015-09-30 | 福特全球技术公司 | Sealing device |
| CN105697186A (en) * | 2016-01-14 | 2016-06-22 | 安徽江淮汽车股份有限公司 | Sealing device for oil level gauge hole of engine |
| CN112440114A (en) * | 2019-09-05 | 2021-03-05 | 中国科学院沈阳自动化研究所 | Material-increasing and material-decreasing composite manufacturing process equipment |
| CN112440114B (en) * | 2019-09-05 | 2022-02-22 | 中国科学院沈阳自动化研究所 | Material-increasing and material-decreasing composite manufacturing process equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103195925B (en) | 2015-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209115078U (en) | A kind of metal variable diameter sealed soluble press-fracturing bridge plug | |
| CN103195925A (en) | Venthole plugging device | |
| CA2475957A1 (en) | Multi-point high pressure seal for expandable tubular connections | |
| CN109578740B (en) | Pipeline plugging device | |
| CN107989569B (en) | Coiled tubing dynamic seal device | |
| CN110735609B (en) | Application method of device for petroleum industry | |
| CN203594397U (en) | Installation tool for oil extraction well mouth seal polish rod packing | |
| CN106854983A (en) | Plug for tubing coupling | |
| CN203809252U (en) | Dual-purpose tire valve connecting device | |
| CN103452517B (en) | A kind of ring packing assembly of multi-level metal sealing structure | |
| CN207094003U (en) | A kind of pipe joint of belt lock catch | |
| CN2916114Y (en) | Oil well head sealing device | |
| CN215213407U (en) | Eccentric polished rod sealing device | |
| US11499390B2 (en) | Sealing assembly for dissolvable bridge plug, a dissolvable bridge plug and a sealing method for gap | |
| CN214787301U (en) | Packer for oil production pipeline | |
| CN107061973A (en) | A kind of oil filling interface arrangement | |
| CN205716137U (en) | Quick connector | |
| CN209603915U (en) | It is a kind of for salvaging the fishing device of wireless drilling instrument | |
| NO340858B1 (en) | High temperature / high pressure seal | |
| CN109282106B (en) | Plugging device and plugging device | |
| CN108150130A (en) | Fracturing bridge plug | |
| CN208122809U (en) | A kind of rotating blowout preventer | |
| CN206786314U (en) | A kind of oil filling interface arrangement | |
| CN216479346U (en) | Water stop ring with integrated hinge rubber ring | |
| CN220869370U (en) | Sealing rubber cylinder for packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |