Descaling valve system with low-pressure pre-flushing function and using method
By setting up a two -way valve and overflow valve in the division valve system, the problem of equipment damage caused by high -pressure water impact and the primitive valve of the low -pressure pre -fling water unilateral valve can be achieved, and the safe and reliable operation of the scales valve system is realized. Increased stability.
Patent Information
- Application Number
- CN202411505872.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-01-24
AI Technical Summary
In the prior art, when high-pressure water spray removes the iron oxide sheet of hot rolled steel billets, it is easy to form a cavity due to water leakage in the pipeline, causing high-pressure water to rapidly compress the cavity, impact the equipment, and cause damage. At the same time, the low-pressure pre-flushing check valve is prone to damage, and high-pressure water may enter the low-pressure pipeline.
The integrated structure of the scale valve group and the pre -rinse valve group is used to set up a two -way valve between the high -pressure water and the pre -water switch valve, and set the overflow valve between the two unidirectional valves to prevent high -pressure water pairs of water pairs The impact of one -way valve ensures the safe and reliable closure of the unidirectional valve.
It effectively prevents high-pressure water from entering low-pressure pipelines, avoids equipment damage, ensures the safe and reliable operation of the descaling valve system, and improves the stability and durability of the system through pneumatic control and filters.
Smart Images
Figure CN119346639A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of removing iron oxide scale from hot-rolled steel billets, and in particular relates to a descaling valve system with low-pressure pre-flushing water and a use method thereof. Background Art
[0002] In the prior art, the method of spraying high-pressure water onto the surface of the steel plate to remove the scale from the hot-rolled billet is often used. High-pressure water descaling is an intermittent working system. When a billet passes through, the descaling valve is opened to remove the scale; when no billet passes through, the descaling valve is closed. At this time, the water in the descaling pipeline can leak through the nozzle, forming a cavity in the pipeline. When the descaling valve is opened again, the high-pressure water will sharply compress the cavity, impact the pipeline and nozzle, and cause equipment damage.
[0003] At present, in order to prevent the formation of cavities due to water leakage in the pipeline, low-pressure pre-flushing water is often used before the descaling valve is opened to fill the pipeline with water so that high-pressure water can safely reach the surface of the steel billet. The low-pressure pre-flushing water uses a separate circuit. In order to prevent high-pressure water from entering the low-pressure pipeline, a double check valve is often set in the prior art. However, due to the impact of high-pressure water on the double check valve, the check valve is sometimes damaged. Summary of the invention
[0004] In order to overcome the problem that the existing low-pressure pre-flush water check valve is damaged and high-pressure water enters the low-pressure pipeline, the purpose of the present invention is to provide a descaling valve system with low-pressure pre-flush water and a method of use. The descaling valve system adopts an integrated structure of a descaling valve group and a pre-flush water valve group. In order to prevent high-pressure water from entering the low-pressure pipeline, a double check valve is arranged between the high-pressure water and the pre-flush water switch valve, and an overflow valve is arranged between the two check valves to prevent the impact of high-pressure water on the check valve, so that the check valve can be closed safely and reliably.
[0005] The technical solution of the present invention is: a descaling valve system with low-pressure pre-flush water, including a dephosphorization valve group and a pre-flush water valve group, the dephosphorization valve group including a descaling valve, the input end of the descaling valve is connected to a high-pressure dephosphorization water connection port through a pipeline, the output end of the descaling valve is connected to a nozzle pipeline connection port through a pipeline, the pre-flush water valve group includes a pneumatic switch valve, one end of the pneumatic switch valve is connected to a low-pressure dephosphorization water connection port through a pipeline, and the other end is connected to a first one-way valve and a second one-way valve in sequence through pipelines, the output end of the second one-way valve is connected to the output end pipeline of the descaling valve through a pipeline, an overflow pipeline is connected to the pipeline between the first one-way valve and the second one-way valve, an overflow valve is provided on the overflow pipeline, the output end of the overflow valve is connected to an overflow valve discharge port, and the overflow valve discharge port is connected to a drain ditch through a pipeline.
[0006] The descaling valve is also connected to a pneumatic control assembly, which includes a pneumatic throttle valve, a pneumatic valve, a pneumatic triplet and a ball valve connected in sequence through pipelines, and the input end of the ball valve is connected to an external air source connection port.
[0007] The pneumatic triplet is connected with the pneumatic switch valve through a pipeline.
[0008] A maintenance valve is provided on the pipeline between the pneumatic switch valve and the low-pressure dephosphorization water connection port.
[0009] The set pressure of the overflow valve is adjustable, and the set pressure is 2-3 bar higher than the low-pressure water at the low-pressure dephosphorization water connection port.
[0010] A filter and a manual inspection valve are also provided on the pipeline between the descaling valve and the high-pressure dephosphorization water connection port.
[0011] A throttling pipe is connected to the pipe between the pneumatic switch valve and the first one-way valve, a throttling valve is arranged on the throttling pipe, an output end of the throttle valve is connected to a throttle valve outlet, and the throttle valve outlet is connected to a drainage ditch through a pipe.
[0012] A method for using a descaling valve system with low-pressure pre-flushing water, using the descaling valve system with low-pressure pre-flushing water as described above, comprising the following steps: S1: When a steel billet passes through, the descaling valve is opened, and high-pressure dephosphorization water passes through the high-pressure dephosphorization water connection port and then enters the nozzle pipe connection port after passing through the descaling valve. The nozzle pipe connection port is connected to a nozzle to remove the iron oxide scale on the surface of the steel billet by high-pressure water spraying; S2: When no steel billet passes through, the descaling valve is closed and the pneumatic switch valve is opened. The low-pressure dephosphorization water flows through the low-pressure dephosphorization water connection port through the first one-way valve and the second one-way valve and then enters the nozzle pipe connection port, so that the nozzle pipe is filled with low-pressure dephosphorization water. At the same time, an overflow valve is set between the first one-way valve and the second one-way valve. When the pressure in the pipeline exceeds the set value, the overflow valve opens to overflow to prevent overpressure from causing damage to the first one-way valve and the second one-way valve.
[0013] The technical effects of the present invention are as follows: 1. The present invention adopts an integrated structure of a dephosphorization valve group and a pre-flushing water valve group. In order to prevent high-pressure water from entering a low-pressure pipeline, a double one-way valve is arranged between the high-pressure water and pre-flushing water switch valves, and an overflow valve is arranged between the two one-way valves to prevent the impact of high-pressure water on the one-way valve, so that the one-way valve can be safely and reliably closed; 2. The dephosphorization valve switch of the present invention adopts a pneumatic control mode, and the cylinder action speed can be adjusted by a pneumatic throttle valve. At the same time, a high-pressure water filter is arranged to prevent large particle pollutants from damaging the sealing surface of the descaling valve and prevent the nozzle from being blocked; 3. The switch of the pneumatic switch valve of the present invention also adopts pneumatic control, and shares the air source with the descaling valve, and has a compact structure.
[0014] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The present invention is a schematic structural diagram of a descaling valve system with low-pressure pre-flush water according to an embodiment of the present invention.
[0016] Figure markings: 1-ball valve; 2-pneumatic triplex; 3-pneumatic valve; 4-pneumatic throttle valve; 5-descaling valve; 6-manual inspection valve; 7-filter; 8-inspection valve; 9-pneumatic switch valve; 10-first one-way valve; 11-second one-way valve; 12-overflow valve; 13-throttle valve; 14-low-pressure dephosphorization water connection port; 15-high-pressure dephosphorization water connection port; 16-external air source connection port; 17-nozzle pipe connection port; 18-overflow valve outlet; 19-throttle valve outlet; 20-drain ditch. DETAILED DESCRIPTION Example 1
[0017] like Figure 1 As shown, a descaling valve system with low-pressure pre-flush water includes a dephosphorization valve group and a pre-flush water valve group, the dephosphorization valve group includes a descaling valve 5, the input end of the descaling valve 5 is connected to a high-pressure dephosphorization water connection port 15 through a pipeline, and the output end of the descaling valve 5 is connected to a nozzle pipe connection port 17 through a pipeline, the pre-flush water valve group includes a pneumatic switch valve 9, one end of the pneumatic switch valve 9 is connected to a low-pressure dephosphorization water connection port 14 through a pipeline, and the other end is connected to a first one-way valve 10 and a second one-way valve 11 in sequence through pipelines, the output end of the second one-way valve 11 is connected to the output end pipeline of the descaling valve 5 through a pipeline, an overflow pipeline is connected to the pipeline between the first one-way valve 10 and the second one-way valve 11, the overflow pipeline is provided with an overflow valve 12, the output end of the overflow valve 12 is connected to an overflow valve discharge port 18, and the overflow valve discharge port 18 is connected to a drain ditch 20 through a pipeline.
[0018] During actual use, when a steel billet passes through the present invention, the descaling valve 5 is opened, and the high-pressure dephosphorization water enters the nozzle pipe connection port 17 after passing through the descaling valve 5 via the high-pressure dephosphorization water connection port 15. The nozzle pipe connection port 17 is connected to a nozzle, and the iron oxide scale on the surface of the steel billet is removed by high-pressure water jetting; when no steel billet passes through, the descaling valve 5 is closed, the pneumatic switch valve 9 is opened, and the low-pressure dephosphorization water enters the nozzle pipe connection port 17 after passing through the first one-way valve 10 and the second one-way valve 11 via the low-pressure dephosphorization water connection port 14, so that the nozzle pipe is filled with low-pressure dephosphorization water. At the same time, an overflow valve 12 is arranged between the first one-way valve 10 and the second one-way valve 11. When the pressure in the pipeline exceeds the set value, the overflow valve 12 opens to overflow, so as to prevent the first one-way valve 10 and the second one-way valve 11 from being damaged by overpressure. The present invention adopts an integrated structure of a dephosphorization valve group and a pre-flush water valve group. In order to prevent high-pressure water from entering a low-pressure pipeline, a double check valve is arranged between the high-pressure water and the pre-flush water switch valve, and an overflow valve is arranged between the two check valves to prevent the high-pressure water from impacting the check valve, so that the check valve can be closed safely and reliably. Example 2
[0019] Preferably, on the basis of Example 1, in this embodiment, the descaling valve 5 is also connected to a pneumatic control component, and the pneumatic control component includes a pneumatic throttle valve 4, a pneumatic valve 3, a pneumatic triplet 2 and a ball valve 1 connected in sequence through pipelines, and the input end of the ball valve 1 is connected to the external air source connection port 16.
[0020] During actual use, the descaling valve 5 of the present invention is also connected to a pneumatic control component, which includes a pneumatic throttle valve 4, a pneumatic valve 3, a pneumatic triplet 2 and a ball valve 1 connected in sequence through pipelines. The input end of the ball valve 1 is connected to the external air source connection port 16. The dephosphorization valve switch adopts pneumatic control, and the cylinder action speed can be adjusted by the pneumatic throttle valve. Example 3
[0021] Preferably, based on Example 1 or Example 2, in this embodiment, the pneumatic triplet 2 is connected to the pneumatic switch valve 9 through a pipeline.
[0022] In actual use, the pneumatic switch valve of the present invention is also pneumatically controlled, and shares the air source with the descaling valve, so the structure is compact. Example 4
[0023] Preferably, on the basis of Example 1 or Example 3, in this embodiment, a maintenance valve 8 is provided on the pipeline between the pneumatic switch valve 9 and the low-pressure dephosphorization water connection port 14 .
[0024] During actual use, a maintenance valve 8 is provided on the pipeline between the pneumatic switch valve 9 and the low-pressure dephosphorization water connection port 14 of the present invention, which is used to perform maintenance on the low-pressure dephosphorization water pipeline. Example 5
[0025] Preferably, based on Example 1 or Example 4, in this embodiment, the set pressure of the overflow valve is adjustable, and the set pressure is 2-3 bar higher than the low-pressure water at the low-pressure dephosphorization water connection port 14 .
[0026] During actual use, the set pressure of the overflow valve of the present invention is adjustable, and the set pressure is 2-3 bar higher than the low-pressure water at the low-pressure dephosphorization water connection port 14. When the pressure in the pipeline exceeds the set value, the overflow valve 12 opens to overflow to prevent the first one-way valve 10 and the second one-way valve 11 from being damaged by impact due to overpressure, and the one-way valve can be closed safely and reliably. Example 6
[0027] Preferably, on the basis of Example 1 or Example 5, in this embodiment, a filter 7 and a manual inspection valve 6 are further provided on the pipeline between the descaling valve 5 and the high-pressure dephosphorization water connection port 15 .
[0028] During actual use, the present invention is provided with a water filter to prevent large particle pollutants from damaging the sealing surface of the descaling valve and prevent the nozzle from being blocked. Example 7
[0029] Preferably, on the basis of Example 1 or Example 6, in this embodiment, a throttling pipe is connected to the pipe between the pneumatic switch valve 9 and the first one-way valve 10, a throttling valve 13 is provided on the throttling pipe, the output end of the throttle valve 13 is connected to a throttle valve outlet 19, and the throttle valve outlet 19 is connected to a drain ditch 20 through a pipe.
[0030] During actual use, a throttling pipe is connected to the pipe between the pneumatic switch valve 9 and the first one-way valve 10 of the present invention, and a throttling valve 13 is provided on the throttling pipe for adjusting the pressure in the low-pressure dephosphorization water pipe to prevent overpressure from causing the first one-way valve 10 and the second one-way valve 11 to be damaged by impact. Example 8
[0031] A method for using a descaling valve system with low-pressure pre-flushing water, using the descaling valve system with low-pressure pre-flushing water as described above, comprising the following steps: S1: When a steel billet passes through, the descaling valve 5 is opened, and the high-pressure dephosphorization water passes through the high-pressure dephosphorization water connection port 15 and the descaling valve 5 and then enters the nozzle pipe connection port 17. The nozzle pipe connection port 17 is connected to a nozzle to remove the iron oxide scale on the surface of the steel billet by high-pressure water spraying; S2: When no steel billet passes through, the descaling valve 5 is closed and the pneumatic switch valve 9 is opened. The low-pressure dephosphorization water flows through the low-pressure dephosphorization water connection port 14, passes through the first one-way valve 10 and the second one-way valve 11, and then enters the nozzle pipe connection port 17, so that the nozzle pipe is filled with low-pressure dephosphorization water. At the same time, an overflow valve 12 is arranged between the first one-way valve 10 and the second one-way valve 11. When the pressure in the pipeline exceeds the set value, the overflow valve 12 opens to overflow to prevent the first one-way valve 10 and the second one-way valve 11 from being damaged due to overpressure.
[0032] During the switching process from low-pressure pre-flushing water to high-pressure water descaling in the present invention, the high-pressure water quickly fills the nozzle pipe connecting port 17 and the second one-way valve 11, and quickly moves in the closing direction. The overflow valve 12 plays a role in buffering the closing of the second one-way valve 11. The first one-way valve 10 is a backup for the second one-way valve 11. When the first one-way valve 10 is closed, in order to prevent the formation of high pressure between the pneumatic switch valve 9 and the first one-way valve 10 to prevent the closing of the first one-way valve 10, a throttle valve 13 is provided to safely and reliably close the first one-way valve 10, thereby preventing high-pressure water from entering the low-pressure pipeline and impacting the pneumatic switch valve 9.
[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.
Claims
1. A descaling valve system with low-pressure pre-flushing water, characterized in that: The invention comprises a dephosphorization valve group and a pre-flushing valve group, wherein the dephosphorization valve group comprises a descaling valve (5), wherein the input end of the descaling valve (5) is connected to a high-pressure dephosphorization water connection port (15) via a pipeline, and the output end of the descaling valve (5) is connected to a nozzle pipeline connection port (17) via a pipeline. The pre-flushing valve group comprises a pneumatic switch valve (9), wherein one end of the pneumatic switch valve (9) is connected to a low-pressure dephosphorization water connection port (14) via a pipeline, and the other end is connected to a first check valve (10) and a second check valve (11) in sequence via pipelines, wherein the output end of the second check valve (11) is connected to the output end pipeline of the descaling valve (5) via a pipeline, and an overflow pipeline is connected to the pipeline between the first check valve (10) and the second check valve (11), wherein an overflow valve (12) is provided on the overflow pipeline, wherein the output end of the overflow valve (12) is connected to an overflow valve discharge port (18), and wherein the overflow valve discharge port (18) is connected to a drainage ditch (20) via a pipeline.
2. A descaling valve system with low-pressure pre-flushing water according to claim 1, characterized in that: The descaling valve (5) is also connected to a pneumatic control assembly, which comprises a pneumatic throttle valve (4), a pneumatic valve (3), a pneumatic triplet (2) and a ball valve (1) which are sequentially connected via pipelines, and an input end of the ball valve (1) is connected to an external air source connection port (16).
3. A descaling valve system with low-pressure pre-flushing water according to claim 2, characterized in that: The pneumatic triplex (2) is connected to the pneumatic switch valve (9) via a pipeline.
4. A descaling valve system with low-pressure pre-flushing water according to claim 1, characterized in that: A maintenance valve (8) is provided on the pipeline between the pneumatic switch valve (9) and the low-pressure dephosphorization water connection port (14).
5. A descaling valve system with low-pressure pre-flushing water according to claim 1, characterized in that: The overflow valve has an adjustable set pressure, and the set pressure is 2-3 bar higher than the low-pressure water at the low-pressure dephosphorization water connection port (14).
6. A descaling valve system with low-pressure pre-flushing water according to claim 1, characterized in that: A filter (7) and a manual inspection valve (6) are also provided on the pipeline between the descaling valve (5) and the high-pressure dephosphorization water connection port (15).
7. A descaling valve system with low-pressure pre-flushing water according to claim 1, characterized in that: A throttling pipeline is connected to the pipeline between the pneumatic switch valve (9) and the first one-way valve (10), a throttling valve (13) is provided on the throttling pipeline, an output end of the throttling valve (13) is connected to a throttling valve outlet (19), and the throttling valve outlet (19) is connected to a drainage ditch (20) via a pipeline.
8. A method for using a descaling valve system with low-pressure pre-flushing water, using the descaling valve system with low-pressure pre-flushing water as claimed in claim 1, characterized in that: The following steps are involved: S1: When a steel billet passes through, the descaling valve (5) is opened, and high-pressure dephosphorization water passes through the high-pressure dephosphorization water connection port (15) and the descaling valve (5) and then enters the nozzle pipe connection port (17). The nozzle pipe connection port (17) is connected to a nozzle, and the iron oxide scale on the surface of the steel billet is removed by high-pressure water spraying; S2: When no steel billet passes through, the descaling valve (5) is closed and the pneumatic switch valve (9) is opened. The low-pressure dephosphorization water passes through the low-pressure dephosphorization water connection port (14) and the first one-way valve (10) and the second one-way valve (11) and then enters the nozzle pipe connection port (17), so that the nozzle pipe is filled with the low-pressure dephosphorization water. At the same time, an overflow valve (12) is arranged between the first one-way valve (10) and the second one-way valve (11). When the pressure in the pipe exceeds a set value, the overflow valve (12) opens to overflow, thereby preventing the first one-way valve (10) and the second one-way valve (11) from being damaged due to overpressure.