CN107178631B - Device for automatically sealing prestressed duct - Google Patents
Device for automatically sealing prestressed duct Download PDFInfo
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- CN107178631B CN107178631B CN201710411279.6A CN201710411279A CN107178631B CN 107178631 B CN107178631 B CN 107178631B CN 201710411279 A CN201710411279 A CN 201710411279A CN 107178631 B CN107178631 B CN 107178631B
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- 238000007789 sealing Methods 0.000 title claims abstract description 138
- 238000005192 partition Methods 0.000 claims description 42
- 230000000149 penetrating effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 11
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 4
- 239000011440 grout Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
- F16K11/074—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a device for automatically sealing a prestressed duct, which comprises a duct, wherein a support gasket, a return spring, a sealing cover, a channel pipe and an ejector piece are sequentially arranged in the duct from top to bottom, the support gasket and the channel pipe are both in threaded connection with the duct, the top end of the return spring is connected with the support gasket, the bottom end of the return spring is close to the top end of the sealing cover, a first through hole is formed in the middle of the channel pipe along the axial direction of the channel pipe, the ejector piece comprises a base and an ejector pin arranged on the base, and after the ejector pin penetrates through the first through hole, the top end of the ejector pin is abutted against the bottom end face of the sealing cover. By utilizing the device, the external joint can be detached under the condition of keeping the internal pressure of the prestressed duct, so that the waste is reduced.
Description
Technical Field
The invention belongs to the technical field of highway bridge engineering, and particularly relates to a device for automatically sealing a prestressed duct.
Background
Concrete bridge damage represents various forms, such as prestress loss, concrete breakage and cracking, steel bar corrosion, support seat hollowing and the like, and the damage causes the reduction of the integral rigidity and the bearing capacity of the concrete bridge, and is an important reason for causing bridge diseases. The prestressed duct grouting aims at mainly preventing the prestressed tendon from being corroded, transmitting prestress into a concrete structure through the condensed slurry and making up for the section loss caused by the reserved prestressed duct.
The device for automatically sealing the prestressed duct loop is a protection device which is used for sealing the prestressed duct to maintain the pressure of the prestressed duct in the pressure maintaining process at the later stage of prestressed duct grouting and preventing grouting in the duct from spraying. In the prestressed duct grouting process, grout is filled in a prestressed duct through a U-shaped loop formed by the prestressed duct, the grout is pressed into the prestressed duct through an external connecting pipeline of the prestressed duct under the action of a hydraulic pump, the hydraulic pump must apply enough pressure to ensure that the grout is completely filled in the prestressed duct, and two adjacent prestressed ducts are connected through a connecting pipe, so that two or more ducts form a loop; and closing the pipeline ball valves at two ends of the pore channel loop after grouting is finished so as to ensure that the whole prestressed pore channel is in a closed state, thereby filling the prestressed pore channel with grouting.
Before grouting liquid in the prestressed duct is solidified, pipelines connected with valves at two ends of a duct loop are in a closed state to maintain pressure so that grouting can be filled in the duct, but once grouting is solidified, the pipelines and the valves connected at two ends are filled with grouting and cannot be reused, so that cost waste is serious; however, if the pipelines and the valves at the two ends are detached before the grouting liquid is solidified, grouting pressure of the prestressed duct cannot be maintained, grouting can be sprayed out from the duct under the action of pressure, and grouting of the prestressed duct is not full.
In the prior art, a device or a method for enabling the prestressed duct to be in a certain pressure state and not to leak outside after grouting is finished and detaching pipelines and valves at two ends does not exist. It will thus be seen that the prior art is susceptible to further improvements and enhancements.
Disclosure of Invention
The invention provides a device for automatically sealing a prestressed duct, which aims to avoid the defects of the prior art, so that the use of redundant ducts in the pressure maintaining process is reduced, and resources are saved.
The technical scheme adopted by the invention is as follows:
a device for automatically sealing a prestressed pore passage comprises a pipeline, wherein a supporting gasket, a reset spring, a sealing cover, a channel pipe and an ejector piece are sequentially arranged in the pipeline from top to bottom, the supporting gasket and the channel pipe are all in threaded connection with the pipeline, the top end of the reset spring is connected with the supporting gasket, the bottom end of the reset spring is close to the top end of the sealing cover, a first through hole is formed in the middle of the channel pipe along the axial direction of the channel pipe, the ejector piece comprises a base and an ejector pin arranged on the base, after the ejector pin penetrates through the first through hole, the top end of the ejector pin is abutted against the bottom end face of the sealing cover, a first hollow part is arranged on the supporting gasket, a plurality of first holes penetrating through the supporting gasket are formed in the first hollow part, a second hollow part is arranged on the sealing cover, a plurality of second holes penetrating through the sealing cover are formed in the second hollow part, a third hollow part is arranged on the base, and a plurality of third holes penetrating through the base are formed in the third hollow part, first hole, second hole, first through-hole and the cooperation of third hole form the air passage, the base is along pipeline axial displacement under the exogenic action, and when the seal closure laminated each other with the passageway pipe, the air passage was sealed, and when seal closure and passageway pipe alternate segregation, the air passage switched on.
The pipeline is internally provided with a first thread section and a second thread section, the first thread section is positioned at the upper part of the pipeline, the second thread section is positioned at the lower part of the pipeline, and the first thread section and the second thread section are both provided with internal threads with the same structure.
The supporting gasket is arranged on the first internal thread section, and a first external thread matched with the internal thread of the first internal thread section is arranged on the periphery of the supporting gasket.
The support gasket comprises a gasket body with a cross section in a circular ring shape, a first hollow part is arranged in the middle of the gasket body and comprises a plurality of first clapboards, one end of each first clapboard is connected with each other, the other end of each first clapboard is connected with the gasket body, and the first holes are formed between the two adjacent first clapboards and the gasket body in a matched mode.
The sealing cover comprises a cross section annular cover body, a second hollow-out portion is arranged in the middle of the cover body and comprises a sealing disc and a plurality of second partition plates which are separated from each other, each second partition plate is connected with the sealing disc, the cross section area of the sealing disc is larger than that of the first through hole, and the two adjacent second partition plates are matched with the sealing disc and the cover body to form the second hole.
A sealing gasket is arranged between the bottom end surface of the sealing cover and the top end surface of the channel pipe, a second through hole communicated with the first through hole is formed in the center of the sealing gasket, and the cross sectional area of the second through hole is smaller than that of the sealing disc.
The channel pipe is arranged on the second thread section, and second external threads matched with the internal threads of the second thread section are arranged on the periphery of the channel pipe.
The base comprises a base body with a circular cross section, a third hollow-out portion is arranged in the middle of the base body and comprises a plurality of third partition plates, one end of each third partition plate is connected with each other, the other end of each third partition plate is connected with the base body, and the third partition plates and the base body are matched to form a third hole.
The ejector pins are arranged at the top ends of the centers of the intersecting positions of all the third partition plates.
The invention also discloses a method for automatically sealing the prestressed duct, which comprises the following steps:
the method comprises the following steps that 1, a pipeline is selected, the inner diameter of the selected pipeline needs to be larger than the outer diameter of a pre-stressed duct to be sealed, a first thread section is arranged at one end of the pipeline, a second thread section is arranged at the other end of the pipeline, the first thread section and the second thread section are both provided with internal threads with the same structure, and the internal threads are matched with external threads arranged at an interface end of the pre-stressed duct;
and 7, connecting one end of the pipeline with one interface end of the pre-stressed duct to be sealed, connecting the other end of the pipeline with the other interface end of the pre-stressed duct to be sealed, and forming a complete loop by the pipeline and the pre-stressed duct to be sealed.
The support gasket comprises a gasket body with a cross section in a circular ring shape, a first hollow part is arranged in the middle of the gasket body and comprises a plurality of first clapboards, one end of each first clapboard is connected with each other, the other end of each first clapboard is connected with the gasket body, and the first holes are formed between the two adjacent first clapboards and the gasket body in a matched mode.
The sealing cover comprises a cover body with a cross section in a circular ring shape, a second hollow part is arranged in the middle of the cover body and comprises a sealing disc and a plurality of second partition plates which are separated from each other, each second partition plate is connected with the sealing disc, the cross section area of the sealing disc is larger than that of the first through hole, and the second hole is formed by matching two adjacent second partition plates with the sealing disc and the cover body together.
The first through hole is communicated with the second through hole, and the cross sectional area of the second through hole is smaller than that of the sealing plate.
The base comprises a base body with a circular cross section, a third hollow-out portion is arranged in the middle of the base body and comprises a plurality of third partition plates, one end of each third partition plate is connected with each other, the other end of each third partition plate is connected with the base body, and the third partition plates and the base body are matched to form a third hole.
The ejector pins are arranged at the top ends of the centers of the intersecting positions of all the third partition plates.
When the second thread section of the pipeline is connected with the interface end of the pre-stressed duct to be sealed, under the rotating action of the internal thread and the external thread, the interface end of the pre-stressed duct to be sealed pushes the base of the ejector piece to enable the base to move along the axial direction of the pipeline, the ejector pin pushes the sealing cover to move, the sealing cover compresses the reset spring, the sealing cover is separated from the sealing gasket and the channel pipe, and the air passing channel is communicated.
When the base in the pipeline is disconnected with the interface end of the pre-stressed duct to be sealed, the sealing cover rebounds under the action of the reset spring, the sealing cover is attached to the sealing gasket again, and the air passing channel is sealed.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
by utilizing the invention, the grouting in the prestressed duct can be ensured to be in a certain pressure state and not to leak outside after the grouting is finished, and the pipelines and valves at two ends of the prestressed duct can be detached, thereby saving the cost.
Drawings
Fig. 1 is a half-sectional view of the apparatus for automatically closing a prestressed duct of the present invention.
FIG. 2 is a half sectional view of the pipe of the present invention.
Fig. 3 is an isometric view of a support pad of the present invention.
Fig. 4 is an isometric view of the closure of the present invention.
Fig. 5 is an isometric view of the passage tube of the present invention.
Fig. 6 is an isometric view of the ejector of the present invention.
Wherein,
1. the sealing device comprises a pipeline 11, a first threaded section 12, a second threaded section 2, a supporting gasket 21, a gasket body 22, a first partition plate 23, a first hole 3, a return spring 4, a sealing cover 41, a cover body 42, a second partition plate 43, a sealing plate 44, a second hole 5, a pushing piece 51, a base body 52, a third partition plate 53, a thimble 54, a third hole 6, a channel pipe 61, a first through hole 7 and a sealing gasket
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, but the present invention is not limited to these examples.
As shown in fig. 1 to 6, a device for automatically sealing a prestressed duct comprises a duct 1, wherein a supporting gasket 2, a return spring 3, a sealing cover 4, a channel pipe 6 and a pushing piece 5 are sequentially arranged in the duct 1 from top to bottom. A first thread section 11 and a second thread section 12 are arranged inside the pipeline 1, the first thread section 11 is located on the upper portion of the pipeline 1, the second thread section 12 is located on the lower portion of the pipeline 1, and the first thread section 11 and the second thread section 12 are both provided with internal threads with the same structure. The supporting gasket 2 and the channel pipe 6 are both in threaded connection with the pipeline 1.
The support gasket 2 is arranged on the first internal thread section 11, and a first external thread matched with the internal thread of the first internal thread section 11 is arranged on the periphery of the support gasket 2. The supporting pad 2 is provided with a first hollow portion, and the first hollow portion is provided with a plurality of first holes 23 penetrating through the supporting pad 2. Specifically, the support gasket 2 includes a gasket body 21 having a circular ring-shaped cross section, the first hollow-out portion is disposed in the middle of the gasket body 21, the first hollow-out portion includes a plurality of first partition plates 22, one end of each first partition plate 22 is connected to each other, the other end of each first partition plate 22 is connected to the gasket body 21, and the first holes 23 are formed by the cooperation of two adjacent first partition plates 22 and the gasket body.
The top end of the return spring 3 is connected with the supporting gasket 2, and the bottom end of the return spring is close to the top end of the sealing cover 4.
The sealing cover 4 is provided with a second hollow portion, and the second hollow portion is provided with a plurality of second holes 44 penetrating through the sealing cover 4. Specifically, the sealing cover 4 includes a cover body 41 with a circular cross section, a second hollow portion is disposed in the middle of the cover body 41, the second hollow portion includes a sealing plate 43 and a plurality of second partition plates 42 separated from each other, each second partition plate 42 is connected to the sealing plate 43, and two adjacent second partition plates 42 are matched with the sealing plate 43 and the cover body 41 together to form the second hole 44. The cross-sectional area of the sealing disk 43 is larger than the cross-sectional area of the first through hole 61 and the cross-sectional area of the sealing disk 43 is larger than the cross-sectional area of the second through hole, so that the second hole 44 cannot be communicated with the first through hole and the second through hole when the sealing cover 4 is attached to the sealing gasket 7 and the channel tube 6.
The middle part of the channel pipe 6 is provided with a first through hole 61 along the axial direction. The passage pipe 6 is arranged on the second thread section 12, and second external threads matched with the internal threads of the second thread section 12 are arranged on the periphery of the passage pipe 6.
A sealing gasket 7 is arranged between the bottom end surface of the sealing cover 4 and the top end surface of the channel pipe 6. The sealing gasket 7 is made of rubber. The center of the sealing gasket 7 is provided with a second through hole communicated with the first through hole 61.
The ejector 5 comprises a base and an ejector pin 53 arranged on the base, and after the ejector pin 53 penetrates through the first through hole 61, the top end of the ejector pin 53 is abutted against the bottom end face of the sealing cover 4. A third hollowed-out portion is formed in the base, and a plurality of third holes 54 penetrating through the base are formed in the third hollowed-out portion. Specifically, the base includes a base body 51 with a circular cross section, the third hollow portion is disposed in the middle of the base body 51, the third hollow portion includes a plurality of third partition plates 52, one end of each third partition plate 52 is connected to each other, the other end is connected to the base body 51, and the third holes 54 are formed between two adjacent third partition plates 52 and the base body 51 in a matching manner. The thimble 53 is provided at the top end of the center of the intersection of all the third partition plates 52.
The first hole 23, the second hole 44, the second through hole, the first through hole 61 and the third hole 54 are matched to form an air passing channel, the base moves along the axial direction of the pipeline 1 under the action of external force, when the sealing cover 4 is attached to the sealing gasket 7, the air passing channel is closed, and when the sealing cover 4 is separated from the sealing gasket 7, the air passing channel is communicated.
The invention also discloses a method for automatically sealing the prestressed duct, which comprises the following steps:
and 7, connecting one end of the pipeline 1 with one interface end of the pre-stressed duct to be sealed, connecting the other end of the pipeline 1 with the other interface end of the pre-stressed duct to be sealed, and forming a complete loop by the pipeline 1 and the pre-stressed duct to be sealed.
When the second thread section 12 of the pipeline 1 is connected with the interface end of the pre-stressed duct to be sealed, under the rotation action of the internal thread and the external thread, the interface end of the pre-stressed duct to be sealed pushes the base of the ejector 5, so that the base moves along the axial direction of the pipeline 1, the ejector pin 53 pushes the sealing cover 4 to move, the sealing cover 4 compresses the return spring 3, the sealing cover 4 is separated from the sealing gasket 7 and the channel pipe 6, and the air passing channel is communicated.
When the base in the pipeline 1 is disconnected with the interface end of the pre-stressed duct to be sealed, the sealing cover 4 rebounds under the action of the return spring 3, the sealing cover 4 is attached to the sealing gasket 7 again, and the air passing channel is sealed.
The parts which are not described in the invention can be realized by adopting or referring to the prior art.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
1. A method for automatically closing a prestressed duct utilizes a device for automatically closing the prestressed duct, which is characterized by comprising a pipeline, wherein a supporting gasket, a reset spring, a sealing cover, a channel pipe and a pushing piece are sequentially arranged in the pipeline from top to bottom, the supporting gasket and the channel pipe are all in threaded connection with the pipeline, the top end of the reset spring is connected with the supporting gasket, the bottom end of the reset spring is close to the top end of the sealing cover, the middle part of the channel pipe is provided with a first through hole along the axial direction of the channel pipe, the pushing piece comprises a base and an ejector pin arranged on the base, after the ejector pin penetrates through the first through hole, the top end of the ejector pin is abutted against the bottom end surface of the sealing cover, the supporting gasket is provided with a first hollow part, the first hollow part is provided with a plurality of first holes penetrating through the supporting gasket, the sealing cover is provided with a second hollow part, and the second hollow part is provided with a plurality of second holes penetrating through the sealing cover, the base is provided with a third hollow part, a plurality of third holes penetrating through the base are formed in the third hollow part, the first holes, the second holes, the first through holes and the third holes are matched to form an air passage, the base moves axially along a pipeline under the action of external force, when the sealing cover is attached to the channel pipe, the air passage is closed, and when the sealing cover is separated from the channel pipe, the air passage is communicated; the sealing cover comprises a cover body with a circular cross section, a second hollow part is arranged in the middle of the cover body and comprises a sealing disc and a plurality of second partition plates which are separated from each other, each second partition plate is connected with the sealing disc, the cross section area of the sealing disc is larger than that of the first through hole, and two adjacent second partition plates are matched with the sealing disc and the cover body together to form a second hole; a sealing gasket is arranged between the bottom end surface of the sealing cover and the top end surface of the channel pipe, a second through hole communicated with the first through hole is formed in the center of the sealing gasket, and the cross sectional area of the second through hole is smaller than that of the sealing disc;
a first thread section and a second thread section are arranged in the pipeline, the first thread section is positioned at the upper part of the pipeline, the second thread section is positioned at the lower part of the pipeline, and the first thread section and the second thread section are both provided with internal threads with the same structure;
the supporting gasket is arranged on the first thread section, and a first external thread matched with the internal thread of the first thread section is arranged on the periphery of the supporting gasket;
the channel pipe is arranged in the second thread section, and second external threads matched with the internal threads of the second thread section are arranged on the periphery of the channel pipe;
the method specifically comprises the following steps:
step 1, selecting a pipeline, wherein the inner diameter of the selected pipeline is required to be larger than the outer diameter of a pre-stressed duct to be sealed, a first thread section is arranged at one end of the pipeline, a second thread section is arranged at the other end of the pipeline, the first thread section and the second thread section are both provided with internal threads with the same structure, and the internal threads are matched with external threads arranged at an interface end of the pre-stressed duct;
step 2, selecting a support gasket, arranging a first external thread matched with the internal thread of the pipeline on the periphery of the selected support gasket, arranging a first hollow part on the support gasket, arranging a plurality of first holes penetrating through the support gasket at the first hollow part, and screwing the support gasket into the first thread section of the pipeline from one end of the pipeline;
step 3, selecting a return spring, and connecting the return spring to the supporting pad;
step 4, selecting a sealing cover, wherein a second hollow part is arranged on the selected sealing cover, a plurality of second holes penetrating through the sealing cover are formed in the second hollow part, and the sealing cover is arranged in the pipeline from the other end of the pipeline, so that the top end of the sealing cover is close to the bottom end of the reset spring;
step 5, selecting a sealing gasket and a channel pipe, wherein the selected channel pipe is provided with a first through hole along the axial direction, the outer wall of the channel pipe is provided with a second external thread matched with the internal thread of the pipeline, the sealing gasket is provided with a second through hole, the sealing gasket is placed at the top end of the channel pipe and screwed into the second thread section of the pipeline along with the channel pipe until the sealing gasket is attached to the sealing cover, and the sealing cover can be extruded at the screwed position of the channel pipe to be ensured, so that the sealing cover is always contacted with the sealing gasket in a natural state;
step 6, selecting an ejector, wherein the selected ejector comprises a base and an ejector pin arranged on the base, a third hollowed-out part is arranged on the base, a plurality of third holes penetrating through the base are formed in the third hollowed-out part, the base is screwed into a second thread section of the pipeline, and the top end of the ejector pin is abutted against the bottom end face of the sealing cover after the ejector pin penetrates through the first through hole in a natural state; the first hole, the second through hole, the first through hole and the third hole are matched to form a gas passing channel;
step 7, connecting one end of the pipeline with one interface end of the pre-stressed duct to be sealed, connecting the other end of the pipeline with the other interface end of the pre-stressed duct to be sealed, and enabling the pipeline and the pre-stressed duct to be sealed to form a complete loop;
when the second thread section of the pipeline is connected with the interface end of the pre-stressed duct to be sealed, under the rotating action of the internal thread and the external thread, the interface end of the pre-stressed duct to be sealed pushes the base of the ejector piece to enable the base to move along the axial direction of the pipeline, the ejector pin pushes the sealing cover to move, the sealing cover compresses the reset spring, the sealing cover is separated from the sealing gasket and the channel pipe, and the air passage is communicated;
when the base in the pipeline is disconnected with the interface end of the pre-stressed duct to be sealed, the sealing cover rebounds under the action of the reset spring, the sealing cover is attached to the sealing gasket again, and the air passing channel is sealed.
2. The method of claim 1, wherein the support gasket comprises a gasket body with a circular cross section, the first hollow-out portion is disposed in the middle of the gasket body, the first hollow-out portion comprises a plurality of first partition plates, one end of each first partition plate is connected with each other, the other end of each first partition plate is connected with the gasket body, and the first holes are formed between two adjacent first partition plates and the gasket body in a matching manner.
3. The method according to claim 1, wherein the base comprises a base body with a circular cross section, the third hollow portion is arranged in the middle of the base body, the third hollow portion comprises a plurality of third partition plates, one end of each third partition plate is connected with each other, the other end of each third partition plate is connected with the base body, and the third holes are formed between two adjacent third partition plates and the base body in a matched mode.
4. The method of claim 3, wherein the ejector pin is disposed at the top end of the center of the intersection of all the third partitions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710411279.6A CN107178631B (en) | 2017-06-05 | 2017-06-05 | Device for automatically sealing prestressed duct |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710411279.6A CN107178631B (en) | 2017-06-05 | 2017-06-05 | Device for automatically sealing prestressed duct |
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| CN107178631A CN107178631A (en) | 2017-09-19 |
| CN107178631B true CN107178631B (en) | 2022-09-06 |
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| CN115095295B (en) * | 2022-06-28 | 2023-11-21 | 陈大野 | Self-sealing device at bottom of well |
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| TW465752U (en) * | 2000-08-04 | 2001-11-21 | Chi-Mei Tzeng | Novel cock for both natural and liquid gases |
| CN202659996U (en) * | 2012-06-06 | 2013-01-09 | 福建振宝机械有限公司 | Triggering type pressure release valve |
| CN204176030U (en) * | 2014-09-26 | 2015-02-25 | 平顶山市天勤仪表有限责任公司 | For the calibration valve of SF6 gas assembly apparatus |
| CN104712790A (en) * | 2015-03-18 | 2015-06-17 | 丁文玲 | Fluid communication switching device |
| CN204942849U (en) * | 2015-09-21 | 2016-01-06 | 航宇救生装备有限公司 | A kind of pipe joint with self-styled quick-speed plug function |
| CN205225175U (en) * | 2015-11-20 | 2016-05-11 | 中国石油天然气股份有限公司 | Float collar device |
| CN206093045U (en) * | 2016-08-15 | 2017-04-12 | 浙江恒捷铜业有限公司 | Water mixing valve |
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|---|---|
| CN107178631A (en) | 2017-09-19 |
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