CN210367804U

CN210367804U - Quenching cooling device for heat treatment of PC steel bar

Info

Publication number: CN210367804U
Application number: CN201921575350.5U
Authority: CN
Inventors: 时伟
Original assignee: Handan Daobo Metal Materials Co Ltd
Current assignee: Handan Daobo Metal Materials Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-04-21
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a PC rod iron is quenching cooling device for thermal treatment, which comprises a bracket, the catch basin, first casing, the second casing, first water pump, filtering mechanism, the cooling tower, the water supply tank, second water pump and controller, the second casing passes through the fixed plate to be fixed in first casing, the intercommunication has a plurality of branch water supply pipes on the second casing, it has a plurality of outlets to open on the second casing, the cooling water liquid level is not less than first opening top in the second casing, open bottom first casing has the delivery port, the catch basin pass through cooling tube in proper order with first water pump, filtering mechanism, cooling tower and second water pump intercommunication, second water pump output even has the main water supply pipe, main water supply pipe and each branch water supply pipe connection. The utility model discloses can make the PC rod iron dip the cooling water quick even cooling, and the cooling water has mobility in the second casing, guarantees the temperature of cooling water, and the cooling water need not to shut down when circulated use clearance filter mechanism, realizes continuous production.

Description

Quenching cooling device for heat treatment of PC steel bar

Technical Field

The utility model relates to the technical field of PC steel bar heat treatment equipment, in particular to a quenching and cooling device for PC steel bar heat treatment.

Background

The prestressed steel bar is a steel bar for prestressed concrete, called PC steel bar for short, and has the characteristics of high strength toughness, low relaxation, strong bond strength with concrete, good weldability, upsetting property, material saving and the like, so that the prestressed steel bar is widely applied to prestressed members such as high-strength prestressed concrete centrifugal pipe piles, electric poles, overhead piers, railway sleepers and the like abroad, and has a very wide market in the world, especially Asia.

In the PC steel bar treatment quenching process, when the temperature of the PC steel bar is raised to a certain temperature, the PC steel bar needs to be cooled, the heated steel bar is cooled by a conventional quenching cooling device in a spraying mode, and after the PC steel bar is contacted with cooling water, air films and water vapor bubbles are generated between the surface of the PC steel bar and the cooling water, so that the surface of steel cannot be directly contacted with the cooling water, the rapid and uniform cooling effect cannot be achieved, and the product cannot obtain an ideal martensite structure and ideal straightening property; the cooling water contains piece and the impurity on rod iron surface after the heat transfer after spraying, just can use after needing to filter, and the heat transfer after spraying cooling water temperature also can rise, must cool off after filtering and just can cyclic utilization, and often need shut down during the clearance filter equipment, unable continuous production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems and designing a quenching cooling device for heat treatment of PC steel bars.

The technical scheme of the utility model is that the quenching cooling device for heat treatment of the PC steel bar comprises a bracket, a water collecting tank, a first shell, a second shell, a first water pump, a filtering mechanism, a cooling tower, a water supply tank, a second water pump and a controller, wherein the first shell is fixed on the bracket, the second shell is fixed in the first shell through a fixing plate, two ends of the second shell are provided with two first openings along the axis for the PC steel bar to pass through, two ends of the first shell are provided with second openings corresponding to the first openings, the second shell is communicated with a plurality of branch water supply pipes distributed at equal intervals, the second shell is provided with a plurality of water outlets distributed uniformly, the liquid level of cooling water in the second shell is not lower than the top of the first openings, the water collecting tank is positioned below the bracket, the bottom of the first shell is provided with a water outlet for guiding the cooling water after heat exchange to the water collecting tank, the water collecting tank is communicated with the first water pump, the filtering mechanism, the cooling tower and the second water pump in sequence through cooling pipelines, the output end of the second water pump is connected with a main water supply pipe, and the main water supply pipe is connected with each branch water supply pipe.

Furthermore, a liquid level sensor for detecting the water level at the top of the first opening is arranged in the second shell.

Furthermore, water guide plates for guiding the cooling water after heat exchange to the water collecting tank are fixed on two sides of the water outlet.

Furthermore, a rotating shaft is arranged in the water collecting tank, shaft seats are arranged on the inner walls of the two sides of the water collecting tank, the two ends of the rotating shaft are horizontally arranged in bearings of the two shaft seats, and a plurality of stirring blades are arranged on the rotating shaft.

Further, the filtering mechanism comprises a first filter, a second filter, a first electromagnetic valve, a second electromagnetic valve and a pipeline pressure sensor which are arranged on the cooling pipeline, the first filter and the second filter are arranged on the cooling pipeline in parallel, the first filter and the first electromagnetic valve are connected in series, the second filter and the second electromagnetic valve are connected in series, the pipeline pressure sensor is used for detecting the pressure of the cooling pipeline between the first water pump and the cooling tower, and the first filter and the second filter are both YFF-700 and 304-type water filters.

The utility model has the advantages that: by arranging the first shell and the second shell, cooling water is introduced into the second shell, the heated PC steel bar completely enters the cooling water when passing through the second shell, so that the PC steel bar is rapidly and uniformly cooled, the cooling water in the second shell has fluidity, the cooling water after heat exchange is discharged into the water collecting pool, and the stirring blades are driven to rotate by the self-force of the cooling water, so that the water in the water collecting pool is stirred, and the heat radiation of the quick-change hot water is added; after the cooling tower is cooled, the cooling water is recycled; whether the impurities of the filter need to be cleaned or not can be judged according to the detection data of the pipeline pressure sensor, the two filters are flexibly switched to filter the cooling water, the shutdown is not needed, and the continuous production is realized.

Drawings

FIG. 1 is a schematic structural view of a quenching cooling device for heat treatment of a PC steel bar of the present invention;

FIG. 2 is a partial schematic view of a quenching cooling device for heat treatment of a PC steel bar of the present invention;

in the figure, 1, a bracket; 2. a water collecting tank; 3. a first housing; 4. a second housing; 5. a first water pump; 6. a cooling tower; 7. a water supply tank; 8. a second water pump; 9. a controller; 10. a fixing plate; 11. a PC steel bar; 12. a first opening; 13. a second opening; 14. a branched water supply pipe; 15. a water outlet; 16. a water outlet; 17. a main water supply pipe; 18. a liquid level sensor; 19. a water guide plate; 20. a rotating shaft; 21. a shaft seat; 22. a stirring blade; 23. a cooling duct; 24. a first filter; 25. a second filter; 26. a first solenoid valve; 27. a second solenoid valve; 28. a pipeline pressure sensor.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1-2: a quenching cooling device for heat treatment of PC steel rods comprises a support 1, a water collecting tank 2, a first shell 3, a second shell 4, a first water pump 5, a filtering mechanism, a cooling tower 6, a water supply tank 7, a second water pump 8 and a controller 9, wherein the first shell 3 is fixed on the support 1, the second shell 4 is fixed in the first shell 3 through a fixing plate 10, two ends of the second shell 4 are provided with two first openings 12 along the axis for the PC steel rods 11 to pass through, two ends of the first shell 3 are provided with second openings 13 corresponding to the first openings 12, the second shell 4 is communicated with a plurality of branched water supply pipes 14 which are distributed at equal intervals, the second shell 4 is provided with a plurality of water discharge ports 15 which are distributed uniformly, the liquid level of cooling water in the second shell 4 is not lower than the top of the first openings 12, the water collecting tank 2 is positioned below the support 1, the bottom of the first shell 3 is provided with a water outlet 16 for guiding the cooling water after heat exchange to the water collecting tank 2, the water collecting tank 2 is sequentially communicated with the first water pump 5, the filtering mechanism, the cooling tower 6 and the second water pump 8 through a cooling pipeline 23, the output end of the second water pump 8 is connected with a main water supply pipe 17, and the main water supply pipe 17 is connected with each branch water supply pipe 14.

In order to facilitate the regulation of the power of the second water pump 8, the water level in the second housing 4 can be higher than the first opening 12, and a level sensor 18 for detecting the water level at the top of the first opening 12 is arranged in the second housing 4.

In order to guide the water in the first housing 3 to the water collecting tank 2 through the water outlet 16, water guide plates 19 for guiding the cooling water after heat exchange to the water collecting tank 2 are fixed on two sides of the water outlet 16, so that the cooling water after heat exchange is prevented from flowing out from the water outlet 16 along the bottom of the second housing 4.

For the water radiating effect after improving the heat transfer, be equipped with pivot 20 in catch basin 2, install axle bed 21 on the inner wall of catch basin 2 both sides, pivot 20 both ends horizontal installation is in the bearing of two axle beds 21, install a plurality of stirring vane 22 on the pivot 20, delivery port 16 center is not on a vertical face with pivot 20, pivot 20 is partial to delivery port 16 one side, and delivery port 16 exhaust water can fall on the stirring vane 22 of pivot 20 one side, avoid contacting simultaneously with the stirring vane 22 of pivot 20 both sides, influence stirring vane 22's rotation, delivery port 16 exhaust water drives stirring vane 22 rotatory through its self momentum, with the water in stirring catch basin 2, add the hydrothermal heat dissipation of quick change.

The filtering mechanism comprises a first filter 24, a second filter 25, a first electromagnetic valve 26, a second electromagnetic valve 27 and a pipeline pressure sensor 28 which are arranged on the cooling pipeline 23, the first filter 24 and the second filter 25 are arranged on the cooling pipeline 23 in parallel, the first filter 24 and the first electromagnetic valve 26 are connected in series, the second filter 25 and the second electromagnetic valve 27 are connected in series, and the pipeline pressure sensor 28 is used for detecting the pressure of the cooling pipeline 23 between the first water pump 5 and the cooling tower 6. The controller 9 is electrically connected to the first water pump 5, the second water pump 8, the liquid level sensor 18, the first solenoid valve 26, and the second solenoid valve 27.

The utility model has the advantages that: through the arrangement of the first shell 3 and the second shell 4, cooling water is introduced into the second shell 4, the heated PC steel bar 11 completely enters the cooling water when passing through the second shell 4, so that the PC steel bar 11 is rapidly and uniformly cooled, the cooling water in the second shell 4 has fluidity, the cooling water after heat exchange is discharged into the water collecting tank 2, and the stirring blades 22 are driven to rotate by the self-force of the cooling water, so that water in the water collecting tank 2 is stirred, and the heat radiation of quick-change hot water is added; after cooling by the cooling tower 6, the cooling water is recycled; whether the impurities of the filter need to be cleaned or not can be judged according to the detection data of the pipeline pressure sensor 28, the two filters are flexibly switched to filter the cooling water, the shutdown is not needed, and the continuous production is realized.

The working principle of the embodiment is as follows: the cooling water is stored in the water supply tank 7, and the second water pump 8 pumps the cooling water in the water supply tank 7 into the main water supply pipe 17 and the branch water supply pipe 14 in sequence, so as to enter the second housing 4; the heated PC steel bar 11 enters the first shell 3 from the first opening 12 and then enters the second shell 4 from the second opening 13, and contacts with the cooling water in the second housing 4, the cooling water after heat exchange is discharged from the water discharge port 15, the liquid level sensor 18 detects the water level in the second housing 4, so that the water level in the second casing 4 and the second opening 13, the controller 9 controls the output of the second water pump 8, the water supply amount of the branched water supply pipe 14 is larger than the discharge amount of the water discharge port 15, so that the water level in the second shell 4 can be higher than the first opening 12, the PC steel bar 11 is immersed in the water and passes through the second shell 4, the cooling water after heat exchange in the second shell 4 can be discharged through the water outlet 15, the branched water supply pipe 14 continuously supplies cooling water into the second housing 4, so that the cooling water in the second housing 4 keeps flowing state and keeps cooling low temperature;

the cooling water after heat exchange enters the first shell 3 through the water outlet 15 and then is discharged into the water collecting tank 2 through the water outlet 16, and the stirring blades 22 are driven to rotate through the self gravity of the cooling water to stir the water in the water collecting tank 2 and heat the quick-change hot water for heat dissipation;

the first water pump 5 pumps water in the water collecting tank 2 into the cooling tower 6, the cooling tower 6 cools the water, and the cooled water flows into the water supply tank 7, so that the cooling water can be recycled; can judge whether need clear up the impurity of filter according to pipeline pressure sensor 28's detected data, pipeline pressure sensor 28 sends cooling tube 23 pressure information to controller 9, when first filter 24 filters, open through controller 9 control second solenoid valve 27, first solenoid valve 26 is closed, make second filter 25 replace first filter 24 to filter, can clear up first filter 24 this moment, filter the cooling water through switching two filters in a flexible way, need not the shut down, realize continuous production.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. A quenching cooling device for PC steel bar heat treatment comprises a support (1), a water collecting tank (2), a first shell (3), a second shell (4), a first water pump (5), a filtering mechanism, a cooling tower (6), a water supply tank (7), a second water pump (8) and a controller (9), and is characterized in that the first shell (3) is fixed on the support (1), the second shell (4) is fixed in the first shell (3) through a fixing plate (10), two ends of the second shell (4) are provided with two first openings (12) for the PC steel bars (11) to pass through along the axis thereof, two ends of the first shell (3) are provided with second openings (13) corresponding to the first openings (12), the second shell (4) is communicated with a plurality of branched water supply pipes (14) distributed at equal intervals, the second shell (4) is provided with a plurality of water discharge ports (15) distributed uniformly, the cooling water liquid level is not less than first opening (12) top in second casing (4), catch basin (2) are located support (1) below, open first casing (3) bottom has delivery port (16) that are used for with heat transfer back cooling water direction catch basin (2), catch basin (2) pass through cooling tube (23) in proper order with first water pump (5), filtering mechanism, cooling tower (6) and second water pump (8) intercommunication, second water pump (8) output even has main delivery pipe (17), main delivery pipe (17) are connected with each branch's delivery pipe (14).

2. The quenching and cooling device for the heat treatment of the PC steel bar according to claim 1, wherein a liquid level sensor (18) for detecting the water level at the top of the first opening (12) is arranged in the second shell (4).

3. The quenching cooling device for the heat treatment of the PC steel bar as claimed in claim 1, wherein water guide plates (19) for guiding cooling water after heat exchange to the water collecting tank (2) are fixed on two sides of the water outlet (16).

4. The quenching cooling device for the heat treatment of the PC steel bar as claimed in claim 1, wherein a rotating shaft (20) is arranged in the water collecting tank (2), shaft seats (21) are arranged on the inner walls of the two sides of the water collecting tank (2), the two ends of the rotating shaft (20) are horizontally arranged in the bearings of the two shaft seats (21), and a plurality of stirring blades (22) are arranged on the rotating shaft (20).

5. The quenching cooling device for the heat treatment of the PC steel bar according to claim 1, wherein the filtering mechanism comprises a first filter (24), a second filter (25), a first electromagnetic valve (26), a second electromagnetic valve (27) and a pipeline pressure sensor (28), the first filter (24) and the second filter (25) are installed on the cooling pipeline (23) in parallel, the first filter (24) and the first electromagnetic valve (26) are connected in series, the second filter (25) and the second electromagnetic valve (27) are connected in series, and the pipeline pressure sensor (28) is used for detecting the pressure of the cooling pipeline (23) between the first water pump (5) and the cooling tower (6).