CN112431984B - Compensator without internal pressure thrust - Google Patents
Compensator without internal pressure thrust Download PDFInfo
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- CN112431984B CN112431984B CN202011315266.7A CN202011315266A CN112431984B CN 112431984 B CN112431984 B CN 112431984B CN 202011315266 A CN202011315266 A CN 202011315266A CN 112431984 B CN112431984 B CN 112431984B
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- China
- Prior art keywords
- medium flow
- flow channel
- channel body
- compensator
- internal pressure
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/022—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with a single corrugation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a compensator without internal pressure thrust, wherein the lower end of a steel pipe is inserted into a first medium flow channel body and is fixed at the bottom of the first medium flow channel body, an outer sleeve is sleeved on the steel pipe, and a heat insulation material layer is arranged on the outer wall of the steel pipe; when the medium runner is in a thermal expansion state, the rotatable screw is meshed with the gear, and the compensator can offset internal pressure thrust, simplify the design of a support and hanger, reduce the using amount of civil engineering structural materials, save investment and increase the safety of a medium runner system.
Description
Technical Field
The invention belongs to the field of fluid conveying pipelines, and relates to a compensator without internal pressure thrust.
Background
In almost all industrial production fields of steel, electricity, building materials, chemical industry, nonferrous metals and the like, the conveying and the discharge of fluid media are involved. The medium flow channel mostly adopts a compensator to realize the compensation of thermal expansion. The conventional compensator generally realizes free compensation through a non-metallic material or a metal corrugated pipe. After the compensator is arranged in the pipeline, the elbows at the two ends of the medium flow channel can be subjected to tensile force caused by medium pressure. In this case, a fixing bracket is generally disposed at two ends of the compensator to balance the internal pressure and thrust, thereby preventing the compensator from being pulled apart.
On one hand, under the large background of capacity removal in the industrial field, the industrial kiln tends to be large-sized and efficient, so that the size of a medium flow channel is larger and larger, and the internal pressure thrust at two ends of the compensator is larger and larger. On the other hand, along with the popularization and application of the compensator in a high-pressure occasion, the internal pressure thrust of the compensator is increased more and more. The increase of the pressure thrust in the compensator leads to the fixed gallows in both ends to the more and more big horizontal thrust of civil engineering structure. Particularly, for a medium flow channel laid at high altitude, the structural design for bearing horizontal thrust is more and more complex, a large amount of steel is consumed, and great potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a compensator without internal pressure thrust, which can offset the internal pressure thrust, simplify the design of a support and hanger, reduce the using amount of civil structure materials, save the investment and increase the safety of a medium runner system.
In order to achieve the above purpose, the compensator without internal pressure thrust is installed on a medium flow channel, and comprises a steel pipe, a rotatable screw, round steel, a bearing and a gear, wherein the medium flow channel comprises a first medium flow channel body, a second medium flow channel body and a soft connecting part for connecting the first medium flow channel body and the second medium flow channel body;
The rotatable screw engages the gear when the media path is in a thermally expanded state.
The round steel is welded on the outer wall of the second medium flow channel body or welded on the reinforcing rib on the outer wall of the second medium flow channel body.
The soft connecting part is a metal corrugated pipe.
The soft connecting part is made of fabric or skin.
Two fixing supports are arranged at the bottom of the medium flow channel, wherein one fixing support is fixed at the bottom of the first medium flow channel body, and the other fixing support is fixed at the bottom of the second medium flow channel body.
The steel pipe is a seamless steel pipe.
The invention has the following beneficial effects:
when the compensator without the internal pressure thrust is operated specifically, when a medium flow channel is in a cold state, a gear and a rotatable screw rod are in a state of just being disengaged, after the medium flow channel is put into operation, the temperature of a wall plate begins to rise, the height of the gear rises due to thermal expansion of a second medium flow channel body, the gear and the rotatable screw rod begin to be meshed, the temperature gradually rises until the gear and the rotatable screw rod are completely self-locked, when the medium flow channel is stopped or industrial load is reduced, the temperature of the wall plate is gradually reduced, the process is opposite to the thermal expansion process, and the gear and the rotatable screw rod are unlocked, so that the compensator can absorb the internal pressure thrust automatically, manpower intervention is not needed, the internal pressure thrust is counteracted, the design of a support and hanger is simplified, the consumption of civil engineering structure materials is reduced, investment is saved, and meanwhile, the safety of a medium flow channel system is improved.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
fig. 2 is a view showing the connection relationship between the gear 6 and the rotatable screw 3.
Wherein, 1 is soft connecting part, 2 is the steel pipe, 3 is rotatable screw rod, 4 is round steel, 5 is the bearing, 6 is the gear, 71 is first medium runner body, 72 is second medium runner body, 8 is the fixed bolster, 9 is the reinforcement rib.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the compensator without internal pressure thrust according to the present invention is installed on a medium flow passage, and includes a steel pipe 2, a rotatable screw 3, round steel 4, a bearing 5 and a gear 6, the medium flow channel comprises a first medium flow channel body 71, a second medium flow channel body 72 and a soft connecting part 1 for connecting the first medium flow channel body 71 and the second medium flow channel body 72, the lower end of a steel pipe 2 is inserted into the first medium flow channel body 71 and fixed at the bottom of the first medium flow channel body 71, an outer sleeve is sleeved on the steel pipe 2, the outer wall of the steel pipe 2 is provided with a heat insulation material layer, the heat insulation material layer is positioned in the outer sleeve, the lower end of the round steel 4 is fixed on the second medium flow channel body 72, the upper end of the steel pipe 2 is connected with the rotatable screw 3 after being bent, the upper end of the round steel 4 is sleeved with the gear 6 after being bent, and the bearing 5 is arranged between the gear 6 and the round steel 4; the rotatable screw 3 is engaged with the gear 6 when the medium flow path is in a thermally expanded state.
Round steel 4 is welded to the outer wall of the second medium flow channel body 72 or to the reinforcing rib 9 on the outer wall of the second medium flow channel body 72.
The flexible connecting part 1 is a metal corrugated pipe, or the flexible connecting part 1 is made of fabric or skin, and the steel pipe 2 is a seamless steel pipe.
Two fixing brackets 8 are arranged at the bottom of the medium flow channel, wherein one fixing bracket 8 is fixed at the bottom of the first medium flow channel body 71, and the other fixing bracket 8 is fixed at the bottom of the second medium flow channel body 72.
The specific working process of the invention is as follows:
when the medium flow passage is in a cold state, the gear 6 and the rotatable screw 3 are just in a disengagement state, and after the medium flow passage is put into operation, the temperature of the wall plate begins to rise, and the gear 6 is lifted to some extent due to the thermal expansion of the second medium flow passage body 72. The gear 6 and the rotatable screw 3 start to be meshed, and self-locking starting is achieved. The thrust of the internal pressure in the medium flow channel will now be balanced by the friction between the gear 6 and the rotatable screw 3.
When the wall temperature rises further, the height of the gear 6 rises further while thermally expanding in the horizontal direction following the medium flow passage. The teeth of the gear 6 have a profile which is small at the top and large at the bottom, so that the gear 6 is further engaged with the rotatable screw 3 until the maximum operating temperature is reached, and the two are completely engaged. During this period, the degree of engagement between the gear 6 and the rotatable screw 3 changes with the fluctuation of the temperature of the medium flow passage, but is always in a self-locking state.
When the medium flow channel is stopped or the industrial load is reduced, the temperature of the wall plate is gradually reduced, contrary to the thermal expansion process, at the moment, the gear 6 moves towards the stretching direction of the compensator along with the thermal contraction of the medium flow channel in the horizontal direction on one hand, and moves downwards along with the thermal contraction of the medium flow channel in the radial direction on the other hand, namely, the gear 6 is gradually disengaged from the rotatable screw 3 until the medium flow channel is completely stopped and even cooled to the room temperature, so that the gear 6 is just disengaged from the rotatable screw 3. During this period, the degree of engagement between the gear 6 and the rotatable screw 3 changes with the fluctuation of the temperature of the medium flow passage, but is always in a self-locking state.
During specific operation, the tooth height and the appearance of the gear 6 need to be designed, the height of the gear is consistent with the height difference of expansion caused by heat and contraction caused by cold on two sides, and the appearance of the gear 6 is matched with the expansion caused by heat and the retraction dimension of the medium flow channel.
In practical operation, generally, three sets of the present invention can be installed, wherein the three sets of the present invention are respectively located on the front side, the rear side and the top of the medium flow channel; when the size of the medium flow passage is smaller, only one set of the invention is needed to be installed on the top of the medium flow passage.
Taking a steel structure frame of 10m (length) × 15m (width) as an example, assuming that the height of the frame is 50m, after a large-sized medium flow channel is laid on the top, the horizontal thrust on the top of the frame is about 50 tons considering that the size or pressure of the flow channel is large. According to rough estimation, the total amount of the steel structure of the conventional compensator is about 375 tons, and after the method is adopted, the total amount of the steel structure is 150 tons, the total amount of saved steel is about 225 tons, and the direct economic benefit is more than 200 ten thousand yuan.
Claims (6)
1. The compensator without the internal pressure thrust is installed on a medium flow channel and is characterized by comprising a steel pipe (2), a rotatable screw rod (3), round steel (4), a bearing (5) and a gear (6), wherein the medium flow channel comprises a first medium flow channel body (71), a second medium flow channel body (72) and a soft connecting part (1) for connecting the first medium flow channel body (71) and the second medium flow channel body (72), the lower end of the steel pipe (2) is inserted into the first medium flow channel body (71) and fixed at the bottom of the first medium flow channel body (71), an outer sleeve is sleeved on the steel pipe (2), a heat insulation material layer is arranged on the outer wall of the steel pipe (2), the heat insulation material layer is positioned in the outer sleeve, the lower end of the round steel (4) is fixed on the second medium flow channel body (72), the upper end of the steel pipe (2) is connected with the rotatable screw rod (3) after being bent, the upper end of the round steel (4) is bent and then sleeved with a gear (6), wherein a bearing (5) is arranged between the gear (6) and the round steel (4);
when the medium flow passage is in a thermal expansion state, the rotatable screw (3) is engaged with the gear (6).
2. The compensator of no internal pressure thrust according to claim 1, wherein round steel (4) is welded to the outer wall of the second medium flow channel body (72) or to a reinforcing rib (9) on the outer wall of the second medium flow channel body (72).
3. Compensator of non-internal pressure thrust according to claim 1, characterized by soft connection part (1) being metal bellows.
4. Compensator for thrust without internal pressure, according to claim 1, characterized by the fact that the soft connecting element (1) is made of fabric or skin.
5. Compensator of no internal pressure thrust according to claim 1, characterized by that the bottom of the medium flow channel is provided with two fixing brackets (8), where one fixing bracket (8) is fixed to the bottom of the first medium flow channel body (71) and the other fixing bracket (8) is fixed to the bottom of the second medium flow channel body (72).
6. Compensator of no internal pressure thrust according to claim 1, characterized by the steel tube (2) being a seamless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011315266.7A CN112431984B (en) | 2020-11-20 | 2020-11-20 | Compensator without internal pressure thrust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011315266.7A CN112431984B (en) | 2020-11-20 | 2020-11-20 | Compensator without internal pressure thrust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112431984A CN112431984A (en) | 2021-03-02 |
| CN112431984B true CN112431984B (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011315266.7A Active CN112431984B (en) | 2020-11-20 | 2020-11-20 | Compensator without internal pressure thrust |
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| Country | Link |
|---|---|
| CN (1) | CN112431984B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2314214Y (en) * | 1997-12-30 | 1999-04-14 | 机械工业部沈阳仪器仪表工艺研究所 | Force balancing corrugated compensator |
| CN2738079Y (en) * | 2004-10-01 | 2005-11-02 | 邯郸钢铁股份有限公司 | Corrugated compensator with telescopic rotary flange |
| CN205424099U (en) * | 2015-11-25 | 2016-08-03 | 中国能源建设集团广东省电力设计研究院有限公司 | Novel gallows system in air heater of thermal power factory export wind channel of heat |
| CN206072635U (en) * | 2016-09-13 | 2017-04-05 | 河南晋煤天庆煤化工有限责任公司 | New flare stack road compensating joint |
| CN206846160U (en) * | 2017-06-16 | 2018-01-05 | 中国电力工程顾问集团华北电力设计院有限公司 | The compensator structure of zero internal pressure thrust |
| CN107559526A (en) * | 2017-11-10 | 2018-01-09 | 江苏飞天管道设备有限公司 | A kind of expansion joint |
| CN208634632U (en) * | 2018-08-03 | 2019-03-22 | 洛阳美波工贸有限公司 | A kind of high temperature resistant and anti-loosening metal bellows |
-
2020
- 2020-11-20 CN CN202011315266.7A patent/CN112431984B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2314214Y (en) * | 1997-12-30 | 1999-04-14 | 机械工业部沈阳仪器仪表工艺研究所 | Force balancing corrugated compensator |
| CN2738079Y (en) * | 2004-10-01 | 2005-11-02 | 邯郸钢铁股份有限公司 | Corrugated compensator with telescopic rotary flange |
| CN205424099U (en) * | 2015-11-25 | 2016-08-03 | 中国能源建设集团广东省电力设计研究院有限公司 | Novel gallows system in air heater of thermal power factory export wind channel of heat |
| CN206072635U (en) * | 2016-09-13 | 2017-04-05 | 河南晋煤天庆煤化工有限责任公司 | New flare stack road compensating joint |
| CN206846160U (en) * | 2017-06-16 | 2018-01-05 | 中国电力工程顾问集团华北电力设计院有限公司 | The compensator structure of zero internal pressure thrust |
| CN107559526A (en) * | 2017-11-10 | 2018-01-09 | 江苏飞天管道设备有限公司 | A kind of expansion joint |
| CN208634632U (en) * | 2018-08-03 | 2019-03-22 | 洛阳美波工贸有限公司 | A kind of high temperature resistant and anti-loosening metal bellows |
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| Publication number | Publication date |
|---|---|
| CN112431984A (en) | 2021-03-02 |
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