A furnace mouth micro-pressure difference detection control device

Abstract

The present disclosure relates to the technical field of industrial automation control, and one embodiment of the present disclosure provides a furnace mouth micro-pressure difference detection control device, which comprises a shell, and a connecting pipe is fixedly installed on the left side of the bottom end of the shell. In the present disclosure, by arranging a pressure ring pipe, a purging electromagnetic valve, a fixing ring and a poking needle, the stability of the fixing on the pressure ring pipe is ensured by the fixing ring, the pressure in the flue is collected by the pressure ring pipe at multiple points, the internal accumulated ash and slag of the pressure ring pipe is purged by the nitrogen gas after pressure reduction by the purging electromagnetic valve, the poking needle is started at a fixed time, the external pneumatic valve drives the poking needle to reciprocate to break hard slag, and the whole can effectively avoid the blockage of the channel by the high-temperature slag of the converter, prevent the distortion of the micro-pressure difference measurement value caused by the blockage, ensure the accuracy of the pressure signal transmitted to the PLC, and solve the technical problem of the easy blockage of the pressure tapping port in the prior art.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of industrial automation control technology, and more specifically, to a furnace mouth micro-differential pressure detection and control device. Background Technology

[0002] As a core component of the converter dry dust removal system, the furnace mouth micro-pressure difference detection and control device is mainly used to monitor the minute pressure difference between the converter furnace mouth and the flue in real time. By transmitting the detected pressure signal to the dry PLC control system, it enables precise control of the dust collector fan speed, thereby ensuring stable flue gas velocity in the flue, improving flue gas purification efficiency and coal gas recovery quality, and preventing flue gas from being discharged during recovery or release. This device is widely used in converter steelmaking production.

[0003] However, the above implementation method still has the following problems: During the long-term smelting process in the converter, high-temperature slag and dust are prone to accumulate and blockage in the pressure tapping port and pressure tapping channel of the micro-differential pressure detection at the furnace mouth, resulting in poor flow or even complete blockage of the pressure tapping port. On the one hand, the blockage will cause the micro-differential pressure detection value to be distorted, making it impossible for the PLC system to obtain accurate pressure signals, which in turn will lead to deviation in the fan speed regulation, causing fluctuations in flue gas flow rate, reduced dust removal effect, and even problems such as flue gas emission polluting the environment or reduced gas recovery. On the other hand, after the pressure tapping port is blocked, it needs to be disassembled and cleaned manually, which not only increases the workload of operation and maintenance personnel, but also requires suspending the converter smelting process, prolonging equipment downtime, and affecting production efficiency. Therefore, it needs to be improved. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a furnace mouth micro-differential pressure detection and control device, which solves the technical problem that the pressure tapping port is prone to blockage in the prior art.

[0005] According to one aspect, at least one embodiment of this disclosure provides a furnace mouth micro differential pressure detection and control device, including a housing, a connecting pipe fixedly installed on the left side of the bottom end of the housing, a first protective shell fixedly connected to the bottom end of the housing, a second protective shell fixedly installed at the bottom end of the first protective shell, a connecting ring movably sleeved on the outer surface of the first protective shell, a fixing block movably sleeved inside the connecting ring, three fixing blocks, an interface fixedly connected to the outer end of the fixing block, three interfaces, a pressure ring tube fixedly installed at the outer end of the interface, a purge solenoid valve fixedly connected to the outer surface of the pressure ring tube, a flange fixedly installed on the front side of the outer surface of the pressure ring tube, four fixing posts fixedly connected to the outer surface of the pressure ring tube, fixing rings fixedly installed on opposite sides of the four fixing posts, a needle fixedly connected inside the fixing ring, the outer surface of the needle fixedly sleeved with the inner surface of the pressure ring tube, and the inner end of the needle penetrating the pressure ring tube and extending into the interior of the pressure ring tube.

[0006] As a preferred embodiment of this utility model, a rectangular groove is provided inside the fixing block, and a rectangular block is fixedly installed inside the rectangular groove.

[0007] As a preferred embodiment of this utility model, a limiting strip is movably fitted inside the rectangular block, and a connecting rod is fixedly connected to the outer end of the limiting strip.

[0008] As a preferred embodiment of this utility model, a push block is fixedly installed at the outer end of the connecting rod, and the outer end of the connecting rod passes through the rectangular block and extends to the outside of the rectangular block.

[0009] As a preferred embodiment of this utility model, a reset spring is fixedly connected to the bottom of the limiting strip, and the bottom end of the reset spring is fixedly connected to the bottom end inside the rectangular block.

[0010] As a preferred embodiment of this utility model, the outer end of the connecting rod passes through the rectangular groove and extends to the outside of the rectangular groove, and the outer surface of the connecting rod is smooth.

[0011] As a preferred embodiment of this utility model, a limiting block is fixedly connected to the outer surface of the fixing block, and the outer surface of the fixing block is movably sleeved with the inner surface of the first protective shell.

[0012] As a preferred embodiment of this utility model, a limiting groove is formed inside the connecting ring, and the inner surface of the limiting groove is movably connected to the outer surface of the limiting block.

[0013] As a preferred embodiment of this utility model, a locking block is fixedly installed at the top of the connecting ring, and a bolt is movably sleeved inside the locking block.

[0014] As a preferred embodiment of this utility model, the outer surface of the limiting strip is movably sleeved with the inner surface of the connecting ring, and the inner surface of the limiting strip is movably sleeved with the outer surface of the bolt.

[0015] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this disclosure, by setting up a pressure ring pipe, a purging solenoid valve, a fixing ring, and a purging needle, the purging needle is fixed to the pressure ring pipe with stability through the fixing ring. The pressure inside the flue is collected at multiple points through the pressure ring pipe, while the purging solenoid valve uses depressurized nitrogen to purge the accumulated ash and slag inside the pressure ring pipe. The purging needle is activated at regular intervals, and an external pneumatic valve drives the purging needle to reciprocate and break hard slag. The whole process of purging with nitrogen removes the slight accumulation of ash and slag in the pressure ring pipe and breaking hardened slag with the purging needle can effectively avoid the blockage of the pressure tapping channel by high-temperature slag in the converter, prevent the distortion of the micro-pressure difference measurement value due to blockage, ensure the accuracy of the pressure signal transmitted to the PLC, and provide reliable data for subsequent fan speed adjustment and differential pressure control.

[0016] 2. In this disclosure, by setting a fixed block, interface, limit strip, and return spring, the whole assembly moves together with the connecting rod and limit strip by pulling the push block, compressing the return spring. At this time, the limit strip will be completely retracted into the rectangular groove, and the interface will be pulled outward to move the fixed block together. After the fixed block is pulled to the top, the connecting ring can be rotated to change the interface of different specifications. When components such as pressure ring tube and transmitter need to be repaired or replaced, there is no need to readjust the flue interface structure. The multi-interface conversion allows for quick disassembly and assembly, reducing downtime maintenance time, improving equipment operation and maintenance efficiency, avoiding the extension of converter smelting interruption time due to interface compatibility issues, improving the overall practicality, and adapting to changes in long-term production needs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present disclosure; Figure 2 for Figure 1 A schematic diagram of the structure of the first protective shell in the embodiment; Figure 3 for Figure 2 A schematic diagram of the pressure ring tube in the embodiment; Figure 4 for Figure 2 A schematic diagram of the connecting ring structure in the embodiment; Figure 5 for Figure 4 A schematic diagram of the structure of the fixing block in the embodiment; Figure 6 for Figure 5 The schematic diagram of the limiting strip in the embodiment is shown.

[0019] In the diagram: 1. Outer shell; 2. Connecting pipe; 3. Protective shell No. 1; 4. Protective shell No. 2; 5. Connecting ring; 6. Fixing block; 7. Interface; 8. Pressure ring pipe; 9. Purge solenoid valve; 10. Flange; 11. Fixing ring; 12. Fixing column; 13. Needle; 14. Rectangular groove; 15. Rectangular block; 16. Limiting strip; 17. Connecting rod; 18. Push block; 19. Return spring; 20. Limiting block; 21. Limiting groove; 22. Locking block; 23. Bolt. Detailed Implementation

[0020] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0023] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1 to 6 The diagram illustrates a furnace mouth micro-pressure differential detection and control device according to an embodiment of this disclosure. It includes a housing 1, a connecting pipe 2 fixedly installed on the left side of the bottom end of the housing 1, a first protective shell 3 fixedly connected to the bottom end of the housing 1, a second protective shell 4 fixedly installed at the bottom end of the first protective shell 3, a connecting ring 5 movably sleeved on the outer surface of the first protective shell 3, and three fixing blocks 6 movably sleeved inside the connecting ring 5. Three interfaces 7 are fixedly connected to the outer ends of the fixing blocks 6. A pressure ring tube 8 is fixedly installed at the outer end of the tube. A purge solenoid valve 9 is fixedly connected to the outer surface of the pressure ring tube 8. A flange 10 is fixedly installed on the front side of the outer surface of the pressure ring tube 8. A fixing post 12 is fixedly connected to the outer surface of the pressure ring tube 8. There are four fixing posts 12. A fixing ring 11 is fixedly installed on the opposite side of the four fixing posts 12. A needle 13 is fixedly connected inside the fixing ring 11. The outer surface of the needle 13 is fixedly sleeved with the inner surface of the pressure ring tube 8. The inner end of the needle 13 penetrates the pressure ring tube 8 and extends into the interior of the pressure ring tube 8.

[0027] There are four needles 13, which are evenly arranged along the circumference of the pressure ring tube 8 to ensure that all areas inside the pressure ring tube 8 are covered. The pressure ring tube 8 is made of high-temperature resistant stainless steel, and the needles 13 are made of high-strength heat-resistant steel. The inner end of the needle 13 is conical. The fixing ring 11 is fixed to the pressure ring tube 8 by four fixing posts 12 to ensure the stability of the connection. The pressure ring tube 8 is connected to the external pipeline through the flange 10 to ensure the sealing of the connection. One end of the purge solenoid valve 9 is connected to the pressure ring tube 8, and the other end is connected to the external nitrogen source. The purge solenoid valve 9 is controlled by an external start control cabinet. The needles 13 are equipped with photoelectric switches at both ends of their stroke.

[0028] In some examples, a rectangular groove 14 is provided inside the fixing block 6, and a rectangular block 15 is fixedly installed inside the rectangular groove 14.

[0029] The depth of the rectangular groove 14 is perfectly matched with the length of the rectangular block 15, and the inner surfaces of both the rectangular groove 14 and the rectangular block 15 are provided with through grooves to facilitate subsequent positioning.

[0030] In some examples, the rectangular block 15 is movably fitted with a limiting strip 16, and the outer end of the limiting strip 16 is fixedly connected to a connecting rod 17.

[0031] The fixing block 6 and the first protective shell 3 are fixed by the limiting strip 16. The connecting rod 17 is designed to connect with the slide groove and extend through the slide groove to the outside of the slide groove.

[0032] In some examples, a push block 18 is fixedly installed at the outer end of the connecting rod 17, and the outer end of the connecting rod 17 passes through the rectangular block 15 and extends to the outside of the rectangular block 15.

[0033] Pulling the push block 18 can move the connecting rod 17 up and down, and the connecting rod 17 will move the limit strip 16 together during the movement.

[0034] In some examples, a return spring 19 is fixedly connected to the bottom of the limit bar 16, and the bottom end of the return spring 19 is fixedly connected to the bottom end inside the rectangular block 15.

[0035] When the limiting bar 16 moves downward, it will be completely locked in the rectangular groove 14. At this time, the return spring 19 is compressed by the limiting bar 16 and stores elastic energy.

[0036] In some examples, the outer end of the connecting rod 17 passes through the rectangular groove 14 and extends to the outside of the rectangular groove 14, and the outer surface of the connecting rod 17 is smooth.

[0037] When it is necessary to reset the limit bar 16 and the connecting rod 17, the reset spring 19 will push the limit bar 16 upward through its elastic force, and the limit bar 16 will drive the connecting rod 17 to move together during the upward movement.

[0038] In some examples, the outer surface of the fixing block 6 is fixedly connected to the limiting block 20, and the outer surface of the fixing block 6 is movably sleeved with the inner surface of the first protective shell 3.

[0039] Each fixed block 6 has two upper limit blocks 20. The upper limit blocks 20 limit the fixed block 6 to ensure the stability of the fixed block 6 during movement.

[0040] In some examples, a limiting groove 21 is provided inside the connecting ring 5, and the inner surface of the limiting groove 21 is movably connected to the outer surface of the limiting block 20.

[0041] The depth of the limiting groove 21 is perfectly matched with that of the limiting block 20. The outer surface of the limiting block 20 is smooth, which reduces the friction when moving within the limiting groove 21.

[0042] In some examples, a locking block 22 is fixedly installed at the top of the connecting ring 5, and a bolt 23 is movably fitted inside the locking block 22.

[0043] There are six locking blocks 22, with each pair of locking blocks 22 forming a group. Each group of locking blocks 22 is connected to a bolt 23, and the threaded end of the bolt 23 is engaged with the outer surface of the locking block 22.

[0044] In some examples, the outer surface of the limiting strip 16 is movably sleeved with the inner surface of the connecting ring 5, and the inner surface of the limiting strip 16 is movably sleeved with the outer surface of the bolt 23.

[0045] The bolt end of bolt 23 is passed through the clamping block 22 and the limiting strip 16, and then fixed with a nut, so that the first protective shell 3, the connecting ring 5 and the fixing block 6 are in a fixed state.

[0046] Working principle and usage process of this utility model: The entire system collects pressure within the flue gas at multiple points through the pressure ring pipe 8 installed in the converter gasification cooling flue section. During the high slag blowing period, the purging solenoid valve 9 is triggered periodically to purge the pressure ring pipe 8 with depressurized nitrogen to remove minor ash and slag accumulation. Simultaneously, the needle 13 is activated periodically, driven by an external pneumatic valve to reciprocate and break up hard slag. The limit switch inside the needle 13 provides real-time feedback to the external PLC to indicate the switch is in position, preventing damage from overtravel. After slag breaking, the system is purged again to blow the broken slag away from the pressure tapping channel. During the low slag tapping period, the PLC extends the purging and slag breaking interval to avoid disturbing the flue gas pressure. The PLC monitors the solenoid valve action and limit switch signals. If problems such as needle 13 jamming or solenoid valve failure occur, the pneumatic control cabinet alarm indicator is immediately triggered to remind maintenance, ensuring dust removal efficiency and flue gas recovery, and preventing flue gas emissions.

[0047] When it is necessary to change to a different specification of interface 7, rotate the needle 13 to open the fixing between the connecting ring 5, the fixing block 6 and the first protective shell 3. At this time, by pulling the push block 18, the connecting rod 17 will move together. When the connecting rod 17 moves, it will move the limiting strip 16 together, compressing the return spring 19. At this time, the limiting strip 16 will be completely retracted into the rectangular groove 14. Pull the interface 7 outward to move the fixing block 6 together. After pulling the fixing block 6 to the top, rotate the connecting ring 5 to change to a different specification of interface 7. After selecting a suitable interface 7, push the fixing block 6 backward until the limiting strip 16 is ejected by the elastic force of the return spring 19. Fix the ejected limiting strip 16 with the bolt 23. At this time, the switching of different specification interfaces 7 is completed, which is convenient for connecting and fixing with pressure ring tubes 8 of different sizes, improving the overall practicality.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A furnace mouth micro-differential pressure detection and control device, comprising a housing (1), characterized in that: A connecting pipe (2) is fixedly installed on the left side of the bottom end of the outer shell (1). A first protective shell (3) is fixedly connected to the bottom end of the outer shell (1). A second protective shell (4) is fixedly installed at the bottom end of the first protective shell (3). A connecting ring (5) is movably sleeved on the outer surface of the first protective shell (3). A fixing block (6) is movably sleeved inside the connecting ring (5). There are three fixing blocks (6). An interface (7) is fixedly connected to the outer end of the fixing block (6). There are three interfaces (7). A pressure ring pipe (8) is fixedly installed at the outer end of the interface (7). (8) has a purge solenoid valve (9) fixedly connected to its outer surface. A flange (10) is fixedly installed on the front side of the outer surface of the pressure ring tube (8). A fixing post (12) is fixedly connected to the outer surface of the pressure ring tube (8). There are four fixing posts (12). A fixing ring (11) is fixedly installed on the opposite side of the four fixing posts (12). A needle (13) is fixedly connected inside the fixing ring (11). The outer surface of the needle (13) is fixedly sleeved with the inner surface of the pressure ring tube (8). The inner end of the needle (13) penetrates the pressure ring tube (8) and extends into the interior of the pressure ring tube (8).

2. The furnace mouth micro-pressure differential detection and control device according to claim 1, characterized in that: The fixed block (6) has a rectangular groove (14) inside, and a rectangular block (15) is fixedly installed inside the rectangular groove (14).

3. The furnace mouth micro-pressure differential detection and control device according to claim 2, characterized in that: The rectangular block (15) is movably fitted with a limiting strip (16), and the outer end of the limiting strip (16) is fixedly connected to a connecting rod (17).

4. The furnace mouth micro-pressure differential detection and control device according to claim 3, characterized in that: A push block (18) is fixedly installed at the outer end of the connecting rod (17), and the outer end of the connecting rod (17) passes through the rectangular block (15) and extends to the outside of the rectangular block (15).

5. The furnace mouth micro-pressure differential detection and control device according to claim 3, characterized in that: A reset spring (19) is fixedly connected to the bottom of the limiting strip (16), and the bottom end of the reset spring (19) is fixedly connected to the bottom end inside the rectangular block (15).

6. The furnace mouth micro-pressure differential detection and control device according to claim 3, characterized in that: The outer end of the connecting rod (17) passes through the rectangular groove (14) and extends to the outside of the rectangular groove (14), and the outer surface of the connecting rod (17) is smooth.

7. The furnace mouth micro-pressure differential detection and control device according to claim 1, characterized in that: The outer surface of the fixed block (6) is fixedly connected to the limiting block (20), and the outer surface of the fixed block (6) is movably sleeved with the inner surface of the first protective shell (3).

8. The furnace mouth micro-pressure differential detection and control device according to claim 1, characterized in that: The connecting ring (5) has a limiting groove (21) inside, and the inner surface of the limiting groove (21) is movably connected to the outer surface of the limiting block (20).

9. The furnace mouth micro-pressure differential detection and control device according to claim 1, characterized in that: The top end of the connecting ring (5) is fixedly installed with a locking block (22), and the inside of the locking block (22) is movably fitted with a bolt (23).

10. The furnace mouth micro-pressure differential detection and control device according to claim 3, characterized in that: The outer surface of the limiting strip (16) is movably sleeved with the inner surface of the connecting ring (5), and the inner surface of the limiting strip (16) is movably sleeved with the outer surface of the bolt (23).

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