Vacuum-pumping system for tubular pile maintenance autoclave
By setting up a vacuum system in the autoclave, the problem of serious steam loss caused by large amount of cold air in the autoclave is solved, and the effect of reducing steam loss and production costs is achieved, and the environmental protection and efficiency of the pipe pile maintenance process is improved.
Patent Information
- Application Number
- CN202420978272.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-07
AI Technical Summary
In the existing high-strength concrete pipe pile production and maintenance process, the amount of cold air in the autoclave is large, resulting in serious saturated steam loss and increasing production costs.
A pipe pile maintenance autoclave vacuum system is designed. By setting up a drain pipe, a waste steam pipe and a steam injector pipe at the left end of the autoclave, and equipped with a vacuum pump, a vacuum gauge, a check valve and an intake valve, the gas in the autoclave is vacuumed, reducing the amount of cold air and reducing steam loss.
Through the vacuum system, the thermal alternating rate in the autoclave is greatly improved, the loss of saturated steam is reduced, the efficiency of steam is improved, the cost of pipe pile maintenance process is reduced, and the production is achieved with a lower carbon and environmentally friendly.
Smart Images
Figure CN222590205U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe pile maintenance, in particular to a pipe pile maintenance autoclave vacuum pumping system. Background Art
[0002] The current high-strength concrete pipe pile production and maintenance process generally adopts a double steam process, that is, normal pressure maintenance and high pressure maintenance. The steam consumption of high pressure maintenance is the biggest factor affecting the cost. In the face of the current national environmental protection requirements, low-carbon and green production has received more and more attention in pipe pile companies, and it is also a key process for pipe pile production companies to focus on reducing costs.
[0003] Under current process conditions, pipe pile manufacturers change the door opening mode of the autoclave from a single door at one end to a double door at both ends, that is, one end exits the autoclave and the other end enters the autoclave, and speeds up the entry speed to reduce the heat exchange loss between the cold air outside the autoclave and the saturated steam inside the autoclave, but this still consumes a lot of saturated steam. We propose a new curing process that can reduce the amount of cold air in the autoclave, thereby reducing the loss of saturated steam, and increase the utilization rate of steam backflow between autoclaves, thereby reducing the loss of saturated steam, comprehensively reducing the production cost of the pipe pile curing process, making it more low-carbon and environmentally friendly, and improving the competitiveness of the product.
[0004] In view of the deficiencies in the prior art, the present application provides a vacuum pumping system for a pipe pile curing autoclave that can reduce the loss of saturated steam during autoclave curing. Utility Model Content
[0005] The utility model aims to provide a vacuum pumping system for a high-pressure autoclave for maintaining pipe piles, so as to solve the problems raised in the above-mentioned background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum extraction system for a pipe pile maintenance autoclave, comprising an autoclave, an exhaust pipe, a residual steam pipe and a steam return pipe are connected in parallel at the left end of the autoclave, a steam inlet is opened at the top, a vacuum pump is provided on the left side of the autoclave, the air inlet end of the vacuum pump is connected to the exhaust pipe, a vacuum gauge, a check valve and an air inlet valve are sequentially provided on the pipeline between the vacuum pump and the exhaust pipe, a bypass pipe is connected on the pipeline between the vacuum pump and the vacuum gauge, and a safety net is provided on the free end of the bypass pipe.
[0007] Furthermore, the exhaust end of the vacuum pump is connected to the upper end of the water tank, a water supply pipe and an overflow pipe are connected to the middle of the outer side of the water tank, a fan is provided on the top, a perforated mesh is provided at the upper end of the water tank, and water is supplied to the vacuum pump through a water supply pipe at the lower end of the water tank, and a drain pipe is connected to the water supply pipe.
[0008] Furthermore, an air inlet is provided on the water tank.
[0009] Furthermore, a sewage pipe is provided at the bottom of the water tank.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] (1) After the gas in the autoclave is extracted, the heat exchange rate can be greatly improved and the loss of saturated steam can be reduced;
[0012] (2) After the autoclave is evacuated, the pipe piles in the autoclave are heated more evenly, reducing the temperature difference between the inside and outside of the pipe pile embryo;
[0013] (3) After the high-pressure autoclave is evacuated, the steam transfer between autoclaves is more thorough, which can improve the efficiency of steam transfer. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a structural diagram of a vacuum pumping system of a high-pressure autoclave for maintaining pipe piles.
[0015] In the figure: autoclave 1, vacuum pump 2, water tank 3, punching net 4, fan 5, water adding pipe 6, overflow pipe 7, sewage pipe 8, water supply pipe 9, drain pipe 10, exhaust pipe 11, residual steam pipe 12, steam return pipe 13, steam inlet 14, bypass pipe 21, safety net 22, vacuum gauge 23, check valve 24, air inlet valve 25, air inlet 31. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] See also Figure 1 A vacuum pumping system for a pile maintenance autoclave comprises an autoclave 1, wherein an exhaust pipe 11, a residual steam pipe 12 and a reverse steam pipe 13 are connected in parallel at the left end of the autoclave 1, and a steam inlet 14 is provided at the top thereof. A vacuum pump 2 is provided on the left side of the autoclave 1, and an air inlet end of the vacuum pump 2 is connected to the exhaust pipe 11. A vacuum gauge 23, a check valve 24 and an air inlet valve 25 are sequentially provided on the pipeline between the vacuum pump 2 and the exhaust pipe 11. A bypass pipe 21 is connected on the pipeline between the vacuum pump 2 and the vacuum gauge 23, and a safety net 22 is provided on the free end of the bypass pipe 21.
[0018] In this embodiment, when the vacuum pump 2 fails, the steam that has been cured is discharged through the exhaust pipe 11, and the remaining steam is discharged through the remaining steam pipe 12. The steam can also be output to other autoclaves 1 that need to be cured through the steam return pipe 13.
[0019] In this embodiment, the exhaust end of the vacuum pump 2 is connected to the upper end of the water tank 3, and the middle part of the outer side of the water tank 3 is connected with a water adding pipe 6 and an overflow pipe 7. When the water temperature in the water tank 3 is too high to cool the vacuum pump 2, cold water needs to be added to the water tank 3 through the water adding pipe 6, and the excess water is discharged through the overflow pipe 7. A fan 5 is provided on the top of the water tank 3. After the vacuum pump 2 evacuates the high-temperature gas in the autoclave 1 into the water tank, the gas is discharged through the fan 5. A perforated mesh 4 is provided at the upper end of the water tank 3, and the water vapor in the drawn gas is precipitated into the bottom of the water tank 3 after heat exchange through the 6 layers of perforated mesh 4. An air inlet 31 is provided on the water tank 3 to facilitate heat exchange with the fan 5. The lower end of the water tank 3 supplies water to the vacuum pump 2 through a water supply pipe 9, and a drain pipe 10 is connected to the water supply pipe 9 to facilitate drainage.
[0020] When in use, the pipe piles to be high-pressure cured are grouped into the autoclave 1 as required, the safety valve of the autoclave door is locked, and then the vacuum pump 2 is started to allow the vacuum pump 2 to extract the low-temperature gas in the autoclave 1 relative to the high-temperature steam to form a sub-vacuum state in the autoclave. The vacuum pump works for 10 to 60 minutes, and the vacuum degree is preferably -0.08 to -0.02Mpa. Then the air inlet valve 25 is closed, and saturated high-temperature steam enters the autoclave 1 through the steam inlet 14, so that the temperature in the autoclave 1 is increased to perform temperature and pressure curing on the pipe piles. The temperature and pressure increase time is 1.0 to 2.0 hours, the constant temperature and pressure time is 4.0 to 6.0 hours, and the pressure relief time is 1.5 to 3.0 hours.
[0021] When the vacuum pump 2 is working, the water tank 3 supplies water to the vacuum pump 2 through the water supply pipe 9. The gas in the autoclave 1 extracted by the vacuum pump 2 is discharged after being processed by the water tank 3, and the generated sewage is discharged through the sewage pipe 8 at the bottom of the water tank 3.
[0022] In this embodiment, when the vacuum pump 2 is turned on, the air inlet valve 25 is closed first, and the gas pumped by the vacuum pump 2 is supplied through the bypass pipe 21. The safety net 22 can prevent impurities from entering. After the vacuum pump 2 is stably vacuumed, the air inlet valve 25 is opened, the bypass pipe 21 is closed, and the vacuum pump 1 is started to be vacuumed. This method can effectively prevent the pipeline from being damaged due to unstable vacuum in the initial stage.
[0023] In this embodiment, the vacuum pump 2 can be used by connecting multiple autoclaves 1 in series one by one, or multiple vacuum pumps 2 can be used together to act on one autoclave 1 or multiple autoclaves 1.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pile maintenance autoclave vacuum system, comprising an autoclave (1), wherein the left end of the autoclave (1) is connected in parallel with an exhaust pipe (11), a residual steam pipe (12) and a steam return pipe (13), and a steam inlet (14) is provided on the top thereof, characterized in that: A vacuum pump (2) is provided on the left side of the autoclave (1); an air inlet end of the vacuum pump (2) is connected to the exhaust pipe (11); a vacuum gauge (23), a check valve (24) and an air inlet valve (25) are provided in sequence on the pipeline between the vacuum pump (2) and the exhaust pipe (11); a bypass pipe (21) is connected to the pipeline between the vacuum pump (2) and the vacuum gauge (23); a safety net (22) is provided at the free end of the bypass pipe (21).
2. The vacuum pumping system for the pipe pile maintenance autoclave according to claim 1, characterized in that: The exhaust end of the vacuum pump (2) is connected to the upper end of the water tank (3); a water supply pipe (6) and an overflow pipe (7) are connected to the middle of the outer side of the water tank (3); a fan (5) is provided on the top; a perforated mesh (4) is provided at the upper end of the inner side of the water tank (3); the lower end of the water tank (3) supplies water to the vacuum pump (2) through a water supply pipe (9); and a drainage pipe (10) is connected to the water supply pipe (9).
3. The vacuum pumping system for the pipe pile maintenance autoclave according to claim 2, characterized in that: The water tank (3) is provided with an air inlet (31).
4. The vacuum pumping system for the pipe pile maintenance autoclave according to claim 2, characterized in that: A sewage pipe (8) is also provided at the bottom of the water tank (3).