CN115229154A - Pneumatic tensioning and pipe drawing device - Google Patents
Pneumatic tensioning and pipe drawing device Download PDFInfo
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- CN115229154A CN115229154A CN202211146748.3A CN202211146748A CN115229154A CN 115229154 A CN115229154 A CN 115229154A CN 202211146748 A CN202211146748 A CN 202211146748A CN 115229154 A CN115229154 A CN 115229154A
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- drawing device
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- 238000007789 sealing Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000011819 refractory material Substances 0.000 claims description 6
- 239000002775 capsule Substances 0.000 abstract 1
- 229910001018 Cast iron Inorganic materials 0.000 description 32
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/108—Removing of casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to the field of centrifugal cast pipes, in particular to a pneumatic tensioning and pipe drawing device. The pneumatic tensioning and pipe drawing device comprises a main shaft pipe, a three-way switching valve, a core pipe, an end cover, a locking nut and a plurality of tensioning units; the three-way switching valve is arranged on the outer side of the main shaft pipe, the end cover is detachably arranged at the opening end, the core pipe is arranged in the main shaft pipe, one end of the core pipe is connected with one outlet of the three-way switching valve, and the other end of the core pipe is fixed on the end cover and penetrates through the end cover to the outside; the outer side of the main shaft pipe is provided with a limiting edge, the locking nut is screwed in the limiting edge, the plurality of tensioning units are sleeved outside the main shaft pipe and sleeved in an area between the limiting edge and the end cover, and the tensioning units are of telescopic hollow capsule structures. The pneumatic tensioning and tube drawing device provided by the invention solves the problem that the tube wall is easily scratched by the existing tube drawing machine.
Description
Technical Field
The invention relates to the field of centrifugal casting pipes, in particular to a pneumatic tensioning and pipe drawing device.
Background
After the pipe is cast using the centrifugal pipe caster, the cast iron pipe needs to be pulled out of the centrifugal pipe caster. In order to solve the problems of time and labor waste and low efficiency of manual tube drawing, a tube drawing machine is generally adopted for tube drawing operation at present. The existing tube drawing machine generally adopts an air cylinder to drive a tensioning device to be tightly abutted against the inner wall of a cast iron tube and to be drawn out, but the inner wall of the cast iron tube is easily damaged in the tube drawing process, and the product quality is seriously influenced. The main defects are as follows: 1. the contact surface of the tensioning device and the inner wall of the cast iron pipe is small, and the tensioning device is easy to slide in the pipe drawing process, so that the pipe wall is damaged; 2. the impact of the cylinder in the action process is large, and the pipe wall is easily damaged; 3. the force application direction is not coaxial with the axial direction of the cast iron pipe in the pipe drawing process, and the tension device is easy to slide when the pipe is stressed laterally, so that the pipe wall is damaged.
Disclosure of Invention
In order to solve the problem that the pipe wall of the existing pipe drawing machine is easy to scratch, the invention provides the pneumatic tensioning and pipe drawing device for solving the problem.
A pneumatic tensioning and pipe drawing device comprises a main shaft pipe, a three-way switching valve, a core pipe, an end cover, a locking nut and a plurality of tensioning units; the main shaft pipe is a cylinder with one closed end and one open end, the three-way switching valve is arranged on the outer side of the main shaft pipe and close to the closed end, the end cover is detachably arranged at the open end, the core pipe is arranged in the main shaft pipe, the inlet of the three-way switching valve faces outwards, two outlets penetrate through the main shaft pipe, one end of the core pipe is connected with one outlet of the three-way switching valve, and the other end of the core pipe is fixed on the end cover and penetrates through the end cover to the outside; a circle of limiting edge is arranged at a position, close to the middle, on the outer side of the main shaft pipe, threads are arranged on the outer side of the limiting edge, the locking nut is screwed in through the threads, the plurality of tensioning units are sleeved outside the main shaft pipe and are sleeved in an area between the limiting edge and the end cover, the interval between the limiting edge and the end cover is larger than or equal to the sum of the lengths of all the tensioning units, and the locking nut, the plurality of tensioning units and the end cover are sequentially abutted; the tensioning units are of telescopic hollow saccular structures, one or more inflation holes are formed in the position of each tensioning unit of the main shaft pipe, and the inner space of the main shaft pipe and the inner space of each tensioning unit are communicated through the inflation holes.
In a preferred embodiment of the pneumatic tensioning and pipe drawing device provided by the invention, the spindle pipe is a steel round pipe, the opening at one end is welded with the end head to realize sealing, the outer wall at the other end is provided with threads, and the end cover is screwed in through the threads.
The core pipe is a steel round pipe, the diameter of the steel round pipe is smaller than that of the main shaft pipe, the steel round pipe is coaxially arranged in the main shaft pipe, and the outer wall of the core pipe close to one end of the end cover is provided with threads; the center of the circle of the end cover is provided with a connecting hole with threads, the end of the core pipe is screwed in through the connecting hole, and the end cover is screwed in the main shaft pipe and is also screwed in the core pipe. And a support is arranged on the outer side of the core pipe and is abutted against the inner wall of the main shaft pipe.
In a preferred embodiment of the pneumatic tube tensioning and pulling device provided by the present invention, the tensioning unit includes an end plate and a rubber layer, the end plate is a circular steel plate, a shaft hole is formed at a center of the circular steel plate for the spindle tube to pass through, the two end plates are arranged in parallel, and a circle of cylindrical rubber layer is arranged between the two end plates along edges of the two end plates.
In a preferred embodiment of the pneumatic tube tensioning and drawing device provided by the invention, the end plate is provided with two rings of sealing grooves along the circumference of the shaft hole on the outer side surface far away from the interior of the tensioning unit, and the sealing ring is arranged in the sealing groove. The end plate comprises an outer ring and an inner ring, the inner ring is detachably arranged in the middle of the outer ring and is provided with the shaft hole and the sealing groove, and the outer ring is connected with the rubber layer. And a heat-insulating refractory material is arranged outside the rubber layer.
In a preferred embodiment of the pneumatic tensioning and pipe drawing device provided by the present invention, the tensioning unit further includes a plurality of tensioning strips, the tensioning strips are long-strip-shaped arc-shaped steel plates bending in the width direction, two ends of the tensioning strips are close to the edges of the two end plates, the plurality of tensioning strips are arranged side by side in a circle along the edges of the end plates, and the rubber layers are respectively disposed between the adjacent tensioning strips and between the tensioning strips and the end plates. The outer side surface of the tensioning strip, which is far away from the interior of the tensioning unit, is provided with a heat-insulating refractory material; or the outer side surface of the whole of the plurality of the tensioning strips is provided with a heat-insulating refractory material.
Compared with the prior art, the pneumatic tensioning and pipe drawing device provided by the invention adopts a mode of inflating and pressurizing the tensioning unit to expand and tension the tensioning unit and abut against the inner wall of the cast iron pipe. The contact surface between the tensioning unit and the inner wall of the cast iron pipe is large, and the friction force is large, so that the sliding cannot be generated in the pipe drawing process, and the pipe wall cannot be damaged. And the number of the tensioning units can be flexibly adjusted, the contact surface between the main shaft pipe and the inner wall of the cast iron pipe can be further enlarged by prolonging the main shaft pipe and increasing the number of the tensioning units, and a series of problems caused by small contact surface are thoroughly solved.
The tensioning speed of the tensioning unit can be conveniently controlled by changing the gas flow in the inflation pressurization process. And because the contact area is larger, the impact caused under the same tensioning speed is also obviously reduced, and the problem that the pipe wall is damaged due to the impact can be thoroughly solved.
The cast iron pipe is pushed out of the pipe die by pressurizing the inside of the pipe die, so that the problem that the pipe wall is damaged due to lateral stress in the pipe drawing process is thoroughly solved. Even if the traditional drawing type pipe drawing scheme is adopted, the rubber layer is used for buffering, the main shaft pipe and the cast iron pipe are not in rigid contact, the tensioning unit cannot slide due to lateral stress, and the pipe wall cannot be damaged.
The tensioning unit in the pneumatic tensioning and tube drawing device provided by the invention is used as a loss part, and is convenient to produce and replace. And because the tensioning unit has no mechanical movable part and has no requirements on maintenance such as lubrication, the labor intensity can be reduced, and the production efficiency can be improved.
Drawings
FIG. 1 is a schematic view of a pneumatic tube tensioning and drawing device in accordance with embodiment 1;
FIG. 2 is a longitudinal sectional view of the pneumatic type tube drawing and tensioning device in accordance with example 1;
FIG. 3 is a cross-sectional view of the pneumatic tube tensioning and drawing device in accordance with example 1;
FIG. 4 is a schematic structural view of the pneumatic tube tensioning and drawing device in accordance with example 2;
FIG. 5 is a longitudinal sectional view of the pneumatic type tube drawing and tensioning device in accordance with example 2;
FIG. 6 is a cross-sectional view of the pneumatic type tube drawing and tensioning device in accordance with example 2;
FIG. 7 is a longitudinal sectional view of the pneumatic type tube drawing and tensioning device in accordance with example 3;
FIG. 8 is a cross-sectional view of the pneumatic tube tensioning and drawing device in accordance with example 3;
fig. 9 is a schematic structural view of the pneumatic tube tensioning and drawing device in embodiment 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1:
please refer to fig. 1 to fig. 3, which are a schematic structural diagram of the pneumatic tensioning and pipe drawing device 1 according to the present embodiment of the invention, and two cross-sectional views at two angles, respectively.
The pneumatic tensioning and pipe drawing device 1 comprises a main shaft pipe 2, a three-way switching valve 3, a core pipe 4, an end cover 5, a locking nut 6 and three tensioning units 7.
The main shaft pipe 2 is a steel round pipe, the end is welded in the opening at the left end to realize sealing, and the main shaft pipe is fixed on a pipe taking device of the multifunctional trolley. A three-way switching valve 3 is arranged at a position close to the fixed point, one inlet of the three-way switching valve 3 faces outwards, and two outlets penetrate into the main shaft pipe 2. An annular limiting edge 21 is fixedly welded at a position close to the middle part, a circle of screw threads are lathed on the outer wall of the limiting edge 21, and the locking nut 6 is screwed on the limiting edge 21 through the screw threads.
Three groups of inflation holes are arranged in the region of the main shaft pipe 2 on the right side of the limiting edge 21, and each inflation hole penetrates through the side wall of the main shaft pipe 2 and is communicated with the inside and the outside of the main shaft pipe 2. Three groups of tensioning units 7 are sleeved on the region of the main shaft pipe 2 on the right side of the limiting edge 21, namely the tensioning units 7 are inflated sequentially through the three-way switching valve 3, the main shaft pipe 2 and the inflation holes, and tensioning is achieved.
The core tube 4 is a steel round tube having a smaller diameter than the main shaft tube 2, and a plurality of brackets 41 are provided on the outer side of the core tube, and are erected in the main shaft tube 2 through the brackets 41, and are coaxial with the main shaft tube 2. The left end of the core tube 4 is connected to an outlet of the three-way switching valve 3 (not shown in the drawing), and the right end thereof is extended out of the spindle tube 2, and the outer wall of the right end is provided with a screw thread.
The outer wall of the right end of the main shaft pipe 2 is also provided with threads. The end cover 5 is provided with a connecting hole with threads at the circle center position for connecting with the core tube 4 except that the inner wall of the cover edge is provided with threads for connecting with the spindle tube 2. The end cover 5 is screwed into the right ends of the main shaft pipe 2 and the core pipe 4 to realize connection, so that the main shaft pipe 2 is sealed and the core pipe 4 is supported and fixed.
The spacing between the limiting edge 21 and the end cover 5 is slightly larger than the sum of the lengths of the three tensioning units 7, and under the size limitation, the tensioning units 7 can be tightly pressed by slightly extending the locking nuts 6 to the right out of the limiting edge 21. Thereby forming a state that the locking nut 6, the three tensioning units 7 and the end cover 5 are sequentially propped tightly to realize integral fixation.
The tension unit 7 comprises an end plate, which in turn comprises an inner ring 72 and an outer ring 73, and a rubber layer 71. The inner ring 72 and the outer ring 73 are both steel rings, and the outer edge of the inner ring 72 is in threaded connection with the inner edge of the outer ring 73 and is spliced to form a complete annular end plate. The outer edge of the end plate, i.e. the outer ring, has a diameter slightly smaller than the inner diameter of the respective cast iron pipe, and the inner edge of the end plate, i.e. the inner ring 72, has a diameter slightly larger than the outer diameter of the main shaft pipe 2.
The two end plates are arranged in parallel, and a circle of cylindrical rubber layer 71 is arranged between the two end plates along the edges of the two end plates. The end plate is divided into inner and outer portions so that the inner ring 72 is not installed during production, thereby forming a larger gap at the end. After the processing step of providing the rubber layer 71 is completed, the mold can be taken out from the large gap.
The end plate and the rubber layer 71 are combined together to form an air bag type structure, after inflation, on one hand, the air bag type structure can be tightly propped against the inner wall of the cast iron pipe, and is connected with the cast iron pipe through friction force, so that the cast iron pipe can be pulled out conveniently; on the other hand, the sealing function is also realized, and the cast iron pipe is pushed out by utilizing the pressure of air pressure by pressurizing the interior of the pipe die of the cast pipe, so that the pipe drawing is realized.
On the outer side of the end plate facing away from the interior of the tensioning unit 7, two rings of sealing grooves are provided around the inner edge of the inner ring 72, i.e. the shaft bore, and a sealing ring 74 is provided in the sealing groove. The tension unit 7 is fitted around the spindle pipe 2 with the inner edge of the inner ring 72 as a shaft hole.
The three tensioning units 7 are sequentially arranged and are tightly abutted through the locking nuts 6 and the end covers 5, so that two circles of sealing rings 74 are tightly abutted between adjacent end plates, between the end plates and the locking nuts 6 and between the end plates and the end covers 5, and a good sealing effect is obtained. After the interior of the tension unit 7 is pressurized and inflated, the tension unit 7 expands under the action of air pressure, so that the sealing ring 74 can be further pressed, and the sealing performance can be further optimized.
Finally, a layer of flexible material with heat insulation and fire resistance is wound on the outer side of the rubber layer 71, so that damage caused by direct contact of the rubber layer 71 and the high-temperature cast iron pipe is avoided. Since the flexible material has a small amount of extensibility and the outer diameter of the rubber layer 71 is only slightly smaller than the inner diameter of the cast iron pipe, the tensioning and sealing capabilities of the tensioning unit 7 after inflation are not affected.
The use flow is as follows: the left end of the main shaft pipe 2 is already installed on a pipe taking device of the multifunctional trolley, and then a high-pressure gas pipeline is connected to an inlet of the three-way switching valve 3. The multifunctional trolley is an existing device which has the functions of lifting, left-right moving and front-back moving and has the function of controlling the extension of a device arranged on the multifunctional trolley. The blocking cover of the pipe die is taken out by using the multifunctional trolley, and then the pneumatic tensioning and pipe drawing device 1 is inserted into the cast iron pipe.
The main shaft pipe 2 is inflated by controlling the three-way switching valve 3, and the gas is inflated into the tensioning unit 7 through the three-way switching valve 3, the main shaft pipe 2 and the inflation hole in sequence, so that the tensioning unit 7 is expanded and is abutted against the inner wall of the cast iron pipe. And then the three-way switching valve 3 is switched to inflate the core tube 4, and the gas sequentially passes through the three-way switching valve 3 and the core tube 4 to inflate the inside of the tube mould.
Since the pipe die, the cast iron pipe and the tension unit 7 cooperate to form a sealed cavity, the tension unit 7 is pushed outward by the pressure of the air filled in the cavity. And because the tensioning unit 7 is already tightly propped against the inner wall of the cast iron pipe, the cast iron pipe can be driven to move outwards, thereby realizing pipe drawing. The traditional tube drawing scheme is used in a matched mode, the multifunctional trolley is controlled to move towards the direction far away from the tube die, the main shaft tube 2 is pulled to drive the cast iron tube to move outwards, and the tube drawing efficiency can be improved.
Example 2:
fig. 4 to fig. 6 are a schematic structural diagram of the pneumatic tensioning and pipe drawing device 1 according to the present embodiment of the invention, and two cross-sectional views at two angles.
The difference from embodiment 1 is the structure of the tension unit 7: the tension unit 7 comprises an end plate comprising an inner ring 72 and an outer ring 73, a tension bar 75 and a rubber layer 71. The inner ring 72 and the outer ring 73 are both steel rings, and the outer edge of the inner ring 72 is in threaded connection with the inner edge of the outer ring 73 and is spliced to form a complete annular end plate. The outer edge of the end plate, i.e. the outer edge of the outer ring, has a diameter which is considerably smaller than the inner diameter of the corresponding cast iron pipe, and the inner edge of the end plate, i.e. the inner edge of the inner ring 72, has a diameter which is slightly larger than the outer diameter of the main shaft pipe 2.
The two end plates are arranged in parallel and on the outside between them, along the edges of both, a ring of tension strips 75 is provided. The tensioning strips 75 are long arc steel plates bent in the width direction, the length direction is parallel to the axial direction of the end plates, and 10 tensioning strips 75 are arranged around the two end plates in a circle to form a cylindrical structure. The tension bars 75 are positioned adjacent to and do not contact the end plates at the inner sides of the arcs at both ends, and adjacent tension bars 75 do not contact each other. Rubber layer 71 connections are provided between the tension strips 75 and the outer edge of the end plate, between adjacent tension strips 75. In particular, the rubber layer 71 disposed between the adjacent tension bars 75 does not extend beyond the outer edge of the tension bars 75 to avoid damage caused by direct contact of the rubber layer 71 with the cast iron pipe having a high temperature.
The end plates, the tensioning strips 75 and the rubber layer 71 are combined together to form an air bag type structure, after inflation, the tensioning strips 75 are abutted against the inner wall of the cast iron pipe, and the connection with the cast iron pipe is realized through friction force, so that the cast iron pipe can be pulled out conveniently. The radian of the outer side of the tensioning strip 75 is consistent with that of the inner wall of the cast iron pipe so as to enhance the sealing effect. The three tensioning units 7 are arranged in a staggered manner, so that gaps between adjacent tensioning strips 75 in the same tensioning unit 7 are blocked by the tensioning strips 75 in another tensioning unit 7, so that sufficient sealing performance is obtained, and the pressure tube drawing is facilitated.
Other structures and use flows are the same as those in embodiment 1, and are not described again.
Example 3:
please refer to fig. 7 and fig. 8, which are two cross-sectional views of the pneumatic tensioning and pipe drawing device 1 according to the present invention.
The difference from embodiment 2 is the structure of the tension unit 7: a layer of material with heat insulation and fire resistance is further arranged on the outer side of each tensioning strip 75, so that the tensioning strips 75 are prevented from directly contacting with the high-temperature cast iron pipe and conducting heat to the rubber layer 71 to cause damage. The radian of the outer side of the material is consistent with the radian of the inner wall of the cast iron pipe so as to enhance the sealing effect.
Further, the length of each tension unit 7 is shortened, thereby increasing the number of tension units 7. All the tension units 7 are arranged in a staggered manner, and gaps between adjacent tension units 7 are blocked. Because the sealing performance is difficult to guarantee under the hard material contact, adopt the scheme that increases tensioning unit 7 quantity can make the route of gas leakage more tortuous, and then constitute labyrinth seal's effect to obtain sufficient sealing performance, be convenient for pressurize the tube drawing.
Other structures and use flows are the same as those in embodiment 2, and are not described again.
Example 4:
fig. 9 is a schematic structural diagram of the pneumatic tensioning and pipe drawing device 1 according to the present embodiment of the invention.
The difference from embodiment 2 is the structure of the tension unit 7: a layer of flexible material with heat insulation and fire resistance is wound outside all the tension strips 75, so that the rubber layer 71 is prevented from being directly contacted with a high-temperature cast iron pipe to cause damage.
Other structures and use flows are the same as those in embodiment 2, and are not described again.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a vapour-pressure type tensioning and tube drawing device which characterized in that: the device comprises a main shaft pipe, a three-way switching valve, a core pipe, an end cover, a locking nut and a plurality of tensioning units; the main shaft pipe is a cylinder with one closed end and one open end, the three-way switching valve is arranged on the outer side of the main shaft pipe and close to the closed end, the end cover is detachably arranged at the open end, the core pipe is arranged in the main shaft pipe, the inlet of the three-way switching valve faces outwards, two outlets penetrate through the main shaft pipe, one end of the core pipe is connected with one outlet of the three-way switching valve, and the other end of the core pipe is fixed on the end cover and penetrates through the end cover to the outside; a circle of limiting edge is arranged at a position, close to the middle, on the outer side of the main shaft pipe, threads are arranged on the outer side of the limiting edge, the locking nut is screwed in through the threads, the plurality of tensioning units are sleeved outside the main shaft pipe and are sleeved in an area between the limiting edge and the end cover, the interval between the limiting edge and the end cover is larger than or equal to the sum of the lengths of all the tensioning units, and the locking nut, the plurality of tensioning units and the end cover are sequentially abutted; the tensioning unit is of a telescopic hollow bag-shaped structure, one or more air inflation holes are formed in the position of each tensioning unit of the main shaft pipe, and the inner space of the main shaft pipe and the inner space of each tensioning unit are communicated through the air inflation holes.
2. The pneumatic tensioning and pipe drawing device of claim 1, wherein: the main shaft pipe is a steel round pipe, the end head is welded in the opening at one end to realize sealing, the outer wall at the other end is provided with threads, and the end cover is screwed in through the threads.
3. The pneumatic tensioning and tube drawing device according to claim 2, wherein: the core pipe is a steel round pipe, the diameter of the steel round pipe is smaller than that of the main shaft pipe, the steel round pipe is coaxially arranged in the main shaft pipe, and the outer wall of the core pipe close to one end of the end cover is provided with threads; the center of the circle of the end cover is provided with a connecting hole with threads, the end of the core tube is screwed in through the connecting hole, and the end cover is screwed in the main shaft tube and is also screwed in the core tube.
4. The pneumatic tensioning and pipe drawing device of claim 3, wherein: and a support is arranged on the outer side of the core pipe and is abutted against the inner wall of the main shaft pipe.
5. The pneumatic tensioning and pipe drawing device according to any one of claims 1 to 4, wherein: the tensioning unit comprises end plates and rubber layers, the end plates are circular steel plates, a shaft hole is formed in the circle center of each end plate and is used for the main shaft pipe to penetrate through, the two end plates are arranged in parallel, and a circle of cylindrical rubber layer is arranged between the two end plates along the edges of the two end plates.
6. The pneumatic tensioning and pipe drawing device according to claim 5, wherein: the end plate is keeping away from the inside lateral surface of tensioning unit follows be equipped with two rings of seal grooves around the shaft hole, and in be equipped with the sealing washer in the seal groove.
7. The pneumatic tensioning and pipe drawing device of claim 6, wherein: the end plate comprises an outer ring and an inner ring, the inner ring is detachably arranged in the middle of the outer ring and is provided with the shaft hole and the sealing groove, and the outer ring is connected with the rubber layer.
8. The pneumatic tensioning and pipe drawing device according to claim 6 or 7, wherein: and a heat-insulating refractory material is arranged outside the rubber layer.
9. The pneumatic tensioning and pipe drawing device according to claim 6 or 7, wherein: the tensioning unit still includes a plurality of tensioning strips, the tensioning strip is the rectangular form arc steel sheet of crooked on the width direction, the both ends of tensioning strip are close to two the edge of end plate, it is a plurality of the tensioning strip is followed the round is arranged side by side at the edge of end plate, and is adjacent between the tensioning lath the tensioning strip with all be equipped with between the end plate the rubber layer.
10. The pneumatic tensioning and pipe drawing device of claim 9, wherein: the outer side surface of the tensioning strip, which is far away from the interior of the tensioning unit, is provided with a heat-insulating refractory material; or the outer side surface of the whole of the plurality of the tensioning strips is provided with a heat-insulating refractory material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211146748.3A CN115229154A (en) | 2022-09-21 | 2022-09-21 | Pneumatic tensioning and pipe drawing device |
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| CN202211146748.3A CN115229154A (en) | 2022-09-21 | 2022-09-21 | Pneumatic tensioning and pipe drawing device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1267312A (en) * | 1969-05-16 | 1972-03-15 | Ct De Rech S De Pont A Mousson | Improvements in or relating to extractor for stripping pipes and other hollow parts from moulds and similar operations |
| CN1142422A (en) * | 1995-06-23 | 1997-02-12 | 丰田自动车株式会社 | Method and apparatus for effecting interference fit of two parts by accelerating part or parts |
| CN1230240A (en) * | 1996-09-13 | 1999-09-29 | 海特克公司 | Device for connecting casings |
| CN103836298A (en) * | 2012-11-22 | 2014-06-04 | 中国石油天然气股份有限公司 | Pipeline isolator |
| CN105293202A (en) * | 2015-11-07 | 2016-02-03 | 江阴市申港电讯器材厂 | Multi-section air bag type inflatable sleeve tandem jointing inflation shaft |
| CN110918921A (en) * | 2019-12-20 | 2020-03-27 | 泽州县金秋铸造有限责任公司 | Tube drawing tensioning device |
| CN211085596U (en) * | 2019-10-22 | 2020-07-24 | 上海锴士自动化科技有限公司 | Sealed pipe fitting gas tightness detection device that aerifys and rise tightly |
| CN212043367U (en) * | 2020-04-24 | 2020-12-01 | 江苏天工科技股份有限公司 | Equipment for welding titanium alloy |
| CN217098222U (en) * | 2022-02-23 | 2022-08-02 | 山东本邦建材专用设备有限公司 | Flexible pipe inserting machine expansion core pipe for hollow light wallboard production line |
-
2022
- 2022-09-21 CN CN202211146748.3A patent/CN115229154A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1267312A (en) * | 1969-05-16 | 1972-03-15 | Ct De Rech S De Pont A Mousson | Improvements in or relating to extractor for stripping pipes and other hollow parts from moulds and similar operations |
| CN1142422A (en) * | 1995-06-23 | 1997-02-12 | 丰田自动车株式会社 | Method and apparatus for effecting interference fit of two parts by accelerating part or parts |
| CN1230240A (en) * | 1996-09-13 | 1999-09-29 | 海特克公司 | Device for connecting casings |
| CN103836298A (en) * | 2012-11-22 | 2014-06-04 | 中国石油天然气股份有限公司 | Pipeline isolator |
| CN105293202A (en) * | 2015-11-07 | 2016-02-03 | 江阴市申港电讯器材厂 | Multi-section air bag type inflatable sleeve tandem jointing inflation shaft |
| CN211085596U (en) * | 2019-10-22 | 2020-07-24 | 上海锴士自动化科技有限公司 | Sealed pipe fitting gas tightness detection device that aerifys and rise tightly |
| CN110918921A (en) * | 2019-12-20 | 2020-03-27 | 泽州县金秋铸造有限责任公司 | Tube drawing tensioning device |
| CN212043367U (en) * | 2020-04-24 | 2020-12-01 | 江苏天工科技股份有限公司 | Equipment for welding titanium alloy |
| CN217098222U (en) * | 2022-02-23 | 2022-08-02 | 山东本邦建材专用设备有限公司 | Flexible pipe inserting machine expansion core pipe for hollow light wallboard production line |
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Application publication date: 20221025 |