CN214683734U - Water injection sealing plug for expansion pipe of stainless steel lined composite steel pipe - Google Patents
Water injection sealing plug for expansion pipe of stainless steel lined composite steel pipe Download PDFInfo
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- CN214683734U CN214683734U CN202121352382.6U CN202121352382U CN214683734U CN 214683734 U CN214683734 U CN 214683734U CN 202121352382 U CN202121352382 U CN 202121352382U CN 214683734 U CN214683734 U CN 214683734U
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Abstract
The utility model discloses a water injection sealing plug for an expansion pipe of a lining stainless steel composite steel pipe, which comprises a plug body, wherein the end part of the plug body is sequentially provided with an inlet guide part, a sealing part and a limiting part, the sealing part is provided with a ring groove, and a sealing ring is arranged in the ring groove; the water injection device is characterized in that a water injection passage for injecting water to the composite steel pipe is formed in the plug body, a normal-pressure water injection port and a high-pressure water injection port are formed in the plug body, and the normal-pressure water injection port and the high-pressure water injection port are respectively communicated with the water injection passage. The utility model discloses a sealed end cap of water injection is being suppressed the expand tube in-process, realizes face seal with compound steel pipe tip, and sets up the sealing washer in the sealing, has consequently improved the sealing performance of suppressing the expand tube in-process.
Description
Technical Field
The utility model relates to a processing equipment technical field of the compound steel pipe of nonrust steel pipe is established to the parent tube inside lining, concretely relates to a water injection seal plug that is used for inside lining nonrust steel compound steel pipe to use when the expand tube is suppressed.
Background
In the coal mining process, the remote high-pressure centralized liquid supply pipeline system is required to convey the emulsion for the hydraulic support, a high-pressure rubber pipe or a pipeline coated with a corrosion-resistant layer (paint spraying) outside a seamless steel pipe is generally adopted, the emulsion output by a pump station has high-pressure pulsation impact, the corrosion-resistant layer can fall off under the impact to cause pipeline blockage, the inner wall of the pipeline cannot be coated with the corrosion-resistant layer, chemical treatment modes such as acid pickling and phosphating and the like are adopted, the roughness of the inner surface of the pipeline is poor, the on-way pressure loss is large, the corrosion resistance service life is short, the pipeline cannot be reused, the high-pressure rubber pipe is easy to break except for short service life, and the safety problem occurs. In order to solve the problems, the stainless steel-lined and plastic-coated composite steel pipe is produced at the same time.
The stainless steel-lined externally-coated plastic composite steel pipe is formed by processing and manufacturing a thick-wall seamless steel pipe (base pipe) and a stainless steel pipe (inner pipe), and an anticorrosive plastic coating is coated on the outer surface of the composite steel pipe. When processing the composite pipe, the inner pipe is required to expand to generate plastic deformation and be combined with the outer pipe into a whole. The prior production methods generally comprise two methods, one method is that an inner pipe and an outer pipe are sleeved and then two ends of the inner pipe are plugged, explosive or mixed gas is placed in the inner pipe for detonation, and the inner pipe is expanded and tightly combined with the outer pipe by means of explosive force; and the other is that after the two ends are plugged, high-pressure water is added into the inner pipe to ensure that the inner pipe expands for the whole length in a short time and is tightly combined with the outer pipe, and when the high-pressure water is pressurized, the tightness of the sealing of the composite steel pipe is critical.
Chinese utility model patent CN205362343U discloses a stainless steel composite pipe processing device, the conical plug used in the device and the end face of the composite steel pipe adopt line sealing, when pressurized by high pressure water, leakage is easily caused due to loose sealing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, to the defect that prior art exists, provide a compound steel pipe of inside lining stainless steel for expand tube water injection seal end cap to improve the sealing performance of compound steel pipe when the expand tube is suppressed.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a compound steel pipe expansion of inside lining stainless steel is with sealed end cap of water injection, includes: the end part of the plug body is sequentially provided with an inlet guide part, a sealing part and a limiting part, the sealing part is provided with an annular groove, and a sealing ring is arranged in the annular groove;
the water injection device is characterized in that a water injection passage for injecting water to the composite steel pipe is formed in the plug body, a normal-pressure water injection port and a high-pressure water injection port are formed in the plug body, and the normal-pressure water injection port and the high-pressure water injection port are respectively communicated with the water injection passage.
Preferably, the inlet guide part is frustum-shaped, and the sealing part is frustum-shaped.
Preferably, the sealing part comprises a first sealing part and a second sealing part, the first sealing part is adjacent to the inlet guide part, the second sealing part is adjacent to the limiting part, and the taper of the first sealing part is greater than that of the second sealing part.
Preferably, the annular groove and the seal ring are provided in the second seal portion.
Preferably, one end of the sealing part connected with the limiting part forms a limiting shaft shoulder, and a transition arc is arranged between the peripheral surface of the sealing part and the limiting shaft shoulder.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the utility model discloses a compound steel pipe of inside lining stainless steel is sealed end cap of water injection for expand tube, tip have set gradually entry guide part, sealing and spacing portion, and the ring channel has been seted up to the sealing, is provided with the sealing washer in the ring channel. The inside of the water injection sealing plug is provided with a water injection passage for injecting water into the composite steel pipe, the water injection sealing plug is provided with a normal pressure water injection port and a high pressure water injection port, and the normal pressure water injection port and the high pressure water injection port are respectively communicated with the water injection passage. The utility model discloses a sealed end cap of water injection is being suppressed the expand tube in-process, realizes face seal with compound steel pipe tip to be provided with the sealing washer in the sealing, consequently improved the sealing performance of suppressing the expand tube in-process.
The sealing part is frustum shape, and the sealing part includes first sealing part and second sealing part, and the tapering of first sealing part is greater than the tapering of second sealing part, is being suppressed the expand tube and is accomplishing the back, can more effectually make the sealed end cap of water injection break away from with the tip of compound steel pipe.
Drawings
FIG. 1 is a schematic structural view of a water injection sealing plug for an expansion pipe lined with stainless steel composite steel according to an embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
in the figure: 1-inlet guide part, 2-sealing part, 21-first sealing part, 22-second sealing part, 3-sealing ring, 4-limiting part, 5-limiting shaft shoulder, 6-transition arc, 7-water injection passage, 8-normal pressure water injection port and 9-high pressure water injection port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Herein, for convenience of description, the outer steel pipe of the composite steel pipe is defined as a base pipe, and the inner lining stainless steel pipe of the composite steel pipe is defined as an inner pipe. Herein, compound steel pipe is using the utility model discloses a compound steel pipe of inside lining stainless steel expands with sealed end plug of water injection to compound steel pipe before the expand tube is suppressed to compound steel pipe, the inner tube both ends carry out the reaming turn-ups to weld and seal inner tube and outer pipe end behind the turn-ups, reserve the gas outlet about 10mm during the welding. The water injection sealing plug for the lining stainless steel composite steel pipe expansion is used in the pipe expansion process by pressing and needs to be used in pairs with the exhaust sealing plug.
As shown in fig. 1, the water injection sealing plug for the lining stainless steel composite steel pipe expansion pipe comprises a plug body, wherein an inlet guide part 1, a sealing part 2 and a limiting part 4 are sequentially arranged at the end part of the plug body, an annular groove is formed in the sealing part 2, and a sealing ring 3 is arranged in the annular groove. The inlet guide part 1 is in a frustum shape with the diameter gradually increased from the front end to the rear end, and when the water injection sealing plug deviates from the central axis of the composite steel pipe in the using process, the water injection sealing plug can more conveniently extend into the composite steel pipe through the inlet guide part 1 in the frustum shape. Sealing portion 2 also is frustum shape, and at the in-process that sealing portion 2 stretched into in the compound steel pipe, the outer diameter that increases gradually can avoid compound steel pipe's inner tube to take place to break, and sealing portion 2 and sealing washer 3 can seal compound steel pipe. Preferably, the sealing part 2 includes a first sealing part 21 and a second sealing part 22, as shown in fig. 2, the first sealing part 21 is adjacent to the inlet guide part 1, the second sealing part 22 is adjacent to the stopper part 4, the taper of the first sealing part 21 is greater than that of the second sealing part 22, and at this time, the annular groove and the sealing ring 3 are provided in the second sealing part 22. After the pipe expansion is completed, the water injection sealing plug needs to be separated from the end of the composite steel pipe, the taper of the first sealing part 21 is larger than that of the second sealing part 22, and the water injection sealing plug can be separated from the composite steel pipe more easily. The one end that sealing portion 2 and spacing portion 4 are connected takes shape spacing shaft shoulder 5, is provided with level and smooth transition circular arc 6 between the outer peripheral face of sealing portion 2 and the spacing shaft shoulder 5, stops when the sealed end cap of water injection stretches into compound steel pipe to spacing shaft shoulder 5, can play spacing effect.
As shown in fig. 1, a water injection passage 7 is arranged inside the water injection sealing plug, a high-pressure water injection port 9 is arranged on the water injection sealing plug, the high-pressure water injection port 9 is communicated with the water injection passage 7, a normal-pressure water injection port 8 is also arranged on the water injection sealing plug, and the normal-pressure water injection port 8 is also communicated with the water injection passage 7. The normal pressure water injection port 8 is externally connected with a normal pressure water channel, when the water injection sealing plug extends into the composite steel pipe, normal pressure water is injected into the composite steel pipe through a water pump, and a spherical stop valve is arranged in the normal pressure water channel; the high-pressure water injection port 9 is externally connected with a high-pressure water path, and high-pressure water is injected into the composite steel pipe by a high-pressure water pump to increase the pressure in the composite steel pipe so as to enable the inner pipe to expand and be tightly attached to the outer pipe.
The utility model discloses a sealed end cap of water injection adopts the face to seal with the terminal surface of compound steel pipe, and is provided with the sealing washer in the sealing, and is sealed for current line, has improved the sealing performance who suppresses the expand tube in-process.
The foregoing is considered as illustrative of the preferred embodiments of the invention and not in limitation thereof, and all changes which come within the spirit and scope of the invention are desired to be protected.
Claims (5)
1. The utility model provides a compound steel pipe expansion of inside lining stainless steel is with sealed end cap of water injection, includes: the plug body is characterized in that,
the end part of the plug body is sequentially provided with an inlet guide part, a sealing part and a limiting part, the sealing part is provided with an annular groove, and a sealing ring is arranged in the annular groove;
the water injection device is characterized in that a water injection passage for injecting water to the composite steel pipe is formed in the plug body, a normal-pressure water injection port and a high-pressure water injection port are formed in the plug body, and the normal-pressure water injection port and the high-pressure water injection port are respectively communicated with the water injection passage.
2. The water injection sealing plug for the lining stainless steel composite steel pipe expansion pipe according to claim 1, wherein the inlet guide part is frustum-shaped, and the sealing part is frustum-shaped.
3. The water injection sealing plug for the lining stainless steel composite steel pipe expansion pipe according to claim 2, wherein the sealing portion comprises a first sealing portion and a second sealing portion, the first sealing portion is adjacent to the inlet guide portion, the second sealing portion is adjacent to the limiting portion, and the taper of the first sealing portion is greater than that of the second sealing portion.
4. The water injection sealing plug for the lining stainless steel composite steel pipe expansion pipe according to claim 3, wherein the annular groove and the sealing ring are arranged on the second sealing portion.
5. The water injection sealing plug for the lining stainless steel composite steel pipe expansion pipe according to claim 1, wherein a limiting shaft shoulder is formed at one end of the sealing part connected with the limiting part, and a transition arc is arranged between the outer peripheral surface of the sealing part and the limiting shaft shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121352382.6U CN214683734U (en) | 2021-06-17 | 2021-06-17 | Water injection sealing plug for expansion pipe of stainless steel lined composite steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121352382.6U CN214683734U (en) | 2021-06-17 | 2021-06-17 | Water injection sealing plug for expansion pipe of stainless steel lined composite steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214683734U true CN214683734U (en) | 2021-11-12 |
Family
ID=78556011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121352382.6U Active CN214683734U (en) | 2021-06-17 | 2021-06-17 | Water injection sealing plug for expansion pipe of stainless steel lined composite steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214683734U (en) |
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2021
- 2021-06-17 CN CN202121352382.6U patent/CN214683734U/en active Active
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