CN214406038U

CN214406038U - Double-medium spray gun for blast furnace gas pipeline

Info

Publication number: CN214406038U
Application number: CN202120347459.4U
Authority: CN
Inventors: 庞鹏飞; 窦立锵; 梁康宇; 张威东
Original assignee: Beijing Zhongye Metallurgical Equipment Manufacturing Co ltd
Current assignee: Beijing Zhongye Metallurgical Equipment Manufacturing Co ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-10-15
Anticipated expiration: 2031-02-07

Abstract

The application provides a double-medium spray gun for a blast furnace gas pipeline, which comprises a spraying mechanism and a connecting mechanism, wherein the spraying mechanism comprises a spray gun outer pipe and a spray gun inner pipe, and a gap is formed between the spray gun outer pipe and the spray gun inner pipe; the connecting mechanism comprises a valve body, a first sleeve and a second sleeve which are connected to the two sides of the valve body, and a first cavity is arranged in the valve body; one end of the second sleeve is connected with a fixed flange and an installation flange; the fixed flange and the mounting flange are respectively provided with a first through hole and a second through hole which have the same outer diameter size with the outer pipe of the spray gun; the valve body is provided with a valve core corresponding to the first cavity, the valve core is driven by the lever structure to lift in the first cavity, and the first sleeve is communicated or disconnected with the second sleeve through the lifting of the valve core. The beneficial effect of this application is: the first sleeve is communicated or separated with the second sleeve by the lifting of the valve core in the first cavity, so that the spray gun with abnormal work is quickly and safely replaced on the premise of not stopping gas transmission, and the continuous transmission of gas is ensured.

Description

Double-medium spray gun for blast furnace gas pipeline

Technical Field

The disclosure relates to the technical field of atomizing spray guns in gas pipelines, in particular to a double-medium spray gun for a blast furnace gas pipeline.

Background

A large amount of acidic high-temperature coal gas can be generated in the blast furnace smelting process, the acidic high-temperature coal gas needs to be cooled through a long-distance coal gas pipeline and is sent to a spray tower and a coal gas cabinet, and a cooling, tempering and atomizing spray gun needs to be additionally arranged in the coal gas pipeline of a specific area in the coal gas transmission process, so that the purposes of protecting the coal gas pipeline, primarily cooling the coal gas and adjusting the PH value of the coal gas are achieved.

The atomizing spray gun serving as a key component additionally arranged in a pipeline has good and bad performance and high working efficiency, and plays a key role in removing acid and cooling the coal gas. And the gas is continuous all the time in the use process of the spray gun, the blast furnace always works when the spray gun is abnormal in work and needs to be replaced, and the gas pipeline always has smoke flowing, which brings great difficulty and potential safety hazard to online replacement of the abnormal spray gun.

At present, most of spray guns used in domestic blast furnace gas pipelines are simple atomization spray guns, particularly, the period of online use is short, the spray guns are offline in less than 3 months, the installation and replacement difficulty of the spray guns is high, the time is long, gas leakage is easily caused, and potential safety hazards are brought. The long-acting high-atomization online quick-change spray gun is additionally arranged on a blast furnace gas pipeline, so that the production of the blast furnace is urgent and important.

Disclosure of Invention

The application aims to solve the problems and provides a double-medium spray gun for a blast furnace gas pipeline.

In a first aspect, the application provides a double-medium spray gun for a blast furnace gas pipeline, which comprises a spray mechanism and a connecting mechanism, wherein the spray mechanism comprises a spray gun outer pipe and a spray gun inner pipe sleeved in the spray gun outer pipe, and a gap is arranged between the inner wall of the spray gun outer pipe and the outer wall of the spray gun inner pipe corresponding to the spray gun outer pipe; one end of the spray gun outer pipe is provided with a liquid conveying pipe communicated with the spray gun inner pipe, the side wall of the spray gun outer pipe, which is close to the liquid conveying pipe, is connected with a gas conveying pipe, and the gas conveying pipe is communicated with the gap;

one end of the spray gun outer pipe, which is far away from the infusion pipe, is connected with a spray head part, the spray head part comprises a spray head connecting seat and a nozzle body, the nozzle body is arranged on one side of the spray head connecting seat, and the nozzle body is respectively communicated with the spray gun inner pipe and the gap;

the connecting mechanism comprises a valve body, a first sleeve and a second sleeve which are connected to two sides of the valve body, a first cavity is arranged in the valve body, and one end of the injection mechanism, which is provided with the spray head connecting seat, sequentially penetrates through the second sleeve, the first cavity and the first sleeve and then is connected with the connecting mechanism;

one end, far away from the first sleeve, of the second sleeve is connected with a fixed flange, the fixed flange is connected with an installation flange, and a first sealing gasket is arranged between the fixed flange and the installation flange; the fixed flange and the mounting flange are respectively provided with a first through hole and a second through hole, and the diameters of the first through hole and the second through hole are consistent with the outer diameter of the outer pipe of the spray gun; the spray gun outer pipe sleeved in the first sleeve and the second sleeve is respectively connected with the fixing flange and the mounting flange in a clamping manner through the first through hole and the second through hole;

the valve body is provided with a valve core corresponding to the first cavity, one end of the valve core is connected with a lever structure, the lever structure drives the valve core to lift in the first cavity, the first sleeve is communicated or disconnected with the second sleeve through the lifting of the valve core, and the lifting direction of the valve core is vertical to the axial direction of the first sleeve and the second sleeve.

According to the technical scheme that this application embodiment provided, be equipped with a plurality of support rings along spray gun inner tube axial direction in the clearance, the support ring joint is in the outside of spray gun inner tube.

According to the technical scheme that this application embodiment provided, the spray gun inner tube includes the first section body, the second section body and connects the flexible compensating bellows between the first section body and the second section body, flexible compensating bellows communicates with the first section body and the second section body respectively, the second section body was kept away from to the first section body one end with the transfer line is connected, the first section body was kept away from to the second section body one end with the shower nozzle connecting seat is connected.

According to the technical scheme provided by the embodiment of the application, the lever structure comprises a lower lever and an upper lever, one end of the lower lever is connected with one end of the valve core, the other end of the lower lever is connected with one end of the upper lever, and the end part, far away from the lower lever, of the upper lever enables the valve core to lift through lifting movement.

According to the technical scheme provided by the embodiment of the application, the distance between the upper edge and the lower edge of the spray head part is smaller than or equal to the outer diameter of the spray gun outer pipe, and the upper edge of the spray head part is flush with or lower than the upper edge of the spray gun outer pipe.

According to the technical scheme provided by the embodiment of the application, the gas transmission pipe and the infusion pipe are respectively provided with a one-way valve.

The invention has the beneficial effects that: the application provides a blast furnace gas pipeline is with two medium spray guns, gaseous state medium is transported to the clearance in by the gas-supply pipe, liquid state medium is transported to the spray gun inner tube in by the transfer line, finally gaseous state medium and liquid medium pass the nozzle body and squirt in the gas pipeline outside the spray gun; when the spray gun needs to be replaced, the spray head part is firstly drawn back into the first cavity, the valve core descends in the first cavity until the lower edge of the first cavity through the lever structure, the first sleeve and the second sleeve are separated through the valve core in the first cavity, the coal gas in the coal gas pipeline communicated with the first sleeve is prevented from flowing into the second sleeve, the spray head part is further drawn out of the second sleeve after the first sleeve and the second sleeve are separated through the valve core, the replacement of the spray gun is realized, and the coal gas does not escape out of the connecting mechanism through the first through hole and the second through hole at the end part of the second sleeve because the coal gas does not exist in the second sleeve. Therefore, according to the technical scheme, the spray gun can efficiently atomize under the provided medium pressure and flow, acid substances can be efficiently removed, the temperature of coal gas can be accurately reduced, meanwhile, the connecting mechanism can be used for rapidly and safely replacing the spray gun with abnormal work when the coal gas is transmitted in a pipeline in the production process of a blast furnace, and the requirements of continuous transmission of the coal gas and cooling and tempering of the coal gas are met.

Drawings

FIGS. 1 and 2 are schematic views of a first embodiment of the present application;

the text labels in the figures are represented as: 1. a nozzle connecting base; 2. a nozzle body; 3. a water diversion pin; 4. A spray gun head; 5. an inner tube of the spray gun; 6. an outer tube of the spray gun; 7. a support ring; 8. a first sleeve; 9. a connecting flange; 10. a valve body; 12. locking the nut; 13. a connecting screw; 14. a second seal ring; 15. Tabletting; 16. a valve core; 18. a cylindrical pin; 19. a lower lever; 20. an upper lever; 25. a first bolt; 27. a second sleeve; 28. a fixed flange; 29. a first seal ring; 30. a first gasket; 31. Installing a flange; 32. a bellows; 34. a plug; 37. a one-way valve; 38. a transfusion tube; 39. a gas delivery pipe.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings, and the description of the present section is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention in any way.

Fig. 1 and fig. 2 show schematic diagrams of a first embodiment of the present application, which include a spraying mechanism and a connecting mechanism, wherein the spraying mechanism includes a spray gun outer tube 6 and a spray gun inner tube 5 sleeved in the spray gun outer tube 6, and a gap is provided between the inner wall of the spray gun outer tube 6 and the outer wall of the spray gun inner tube 5; an infusion tube 38 communicated with the spray gun inner tube 5 is arranged at one end of the spray gun outer tube 6, an air delivery tube 39 is connected to the side wall of the spray gun outer tube 6 close to the infusion tube 38, and the air delivery tube 39 is communicated with the gap; a plug 34 is arranged at one end of the spray gun outer pipe 6 and the spray gun inner pipe 5 which are connected with a liquid conveying pipe 38, so that the sealing performance of the spray gun is improved.

One end of the spray gun outer tube 6, which is far away from the infusion tube 38, is connected with a spray head part, the spray head part comprises a spray head connecting seat 1 and a spray head body 2, the spray head body 2 is arranged on one side of the spray head connecting seat 1, and the spray head body 2 is respectively communicated with a spray gun inner tube 5 and a gap;

the connecting mechanism comprises a valve body 10, a first sleeve 8 and a second sleeve 27 which are connected to two sides of the valve body 10, a first cavity is arranged in the valve body 10, and one end of the injection mechanism, which is provided with the spray head connecting seat 1, sequentially penetrates through the second sleeve 27, the first cavity and the first sleeve 8 and then is connected with the connecting mechanism;

one end, far away from the first sleeve 8, of the second sleeve 27 is connected with a fixed flange 28, the fixed flange 28 is connected with an installation flange 31, and a first sealing gasket 30 is arranged between the fixed flange 28 and the installation flange 31; the fixing flange 28 is provided with a first sealing ring 29 to increase the sealing performance of the spray gun; the fixed flange 28 and the mounting flange 31 are respectively provided with a first through hole and a second through hole, and the diameters of the first through hole and the second through hole are consistent with the outer diameter of the spray gun outer tube 6; the spray gun outer pipe 6 sleeved in the first sleeve 8 and the second sleeve 27 is respectively connected with the fixed flange 28 and the mounting flange 31 in a clamping manner through a first through hole and a second through hole;

the valve body 10 is provided with a valve core 16 corresponding to the first cavity, one end of the valve core 16 is connected with a lever structure, the lever structure drives the valve core 16 to lift in the first cavity, the first sleeve 8 is communicated with or disconnected from the second sleeve 27 through the lifting of the valve core 16, and the lifting direction of the valve core 16 is perpendicular to the axial direction of the first sleeve 8 and the second sleeve 27.

In this embodiment, the gaseous medium output by the on-site gas compression equipment is connected into the gap between the outer pipe 6 of the spray gun and the inner pipe 5 of the spray gun through the gas pipe 39, and the liquid medium is connected into the inner pipe 5 of the spray gun through the liquid conveying pipe 38, so that the gaseous medium and the liquid medium are finally sprayed out from the nozzle body 2 at the same time, and the purposes of efficiently removing acidic substances in the gas pipeline and accurately reducing the temperature of the gas are achieved.

In the embodiment, the gas medium is uniformly distributed through the nozzle body 2 and then is guided to accelerate to shear and atomize the accelerated liquid medium, the atomized gas and liquid are cracked and flow in the circumferential direction under the action of the conical water distribution pin 3, the gas and liquid form rotational flow injection through the rotational flow spray gun head 4 and generate gas-assisted atomization with the gas outside the rotational flow spray gun head 4 again, the injection angle after rotational flow can be sprayed within the range of 130 degrees, the injection angle can be selected according to process requirements, and the selection can be 90 degrees and the like.

In this embodiment, the first sleeve 8 is welded to the on-site gas pipeline after being lowered to a proper angle in a shutdown state, and a sealing structure of the first sleeve 8 is formed by the first bolt 25, the connecting flange 9 and the valve body 10 after the welding is completed.

The working process of the implementation is as follows:

when the spray gun is to be installed, the valve core 16 is ensured to be in a descending state, namely the valve core 16 separates and breaks two sides of the corresponding valve core 16 in the first cavity, so that the first sleeve 8 and the second sleeve 27 are in a separation state, the front end of the spray gun, namely one end with a spray head part, horizontally moves to sequentially pass through the mounting flange 31, the first sealing gasket 30 and the fixing flange 28 to enter a space at the end parts of the valve core 16 and the second sleeve 27 in the first cavity, and at the moment, the valve core 16 is driven to ascend through the lever structure, so that the spray head part continuously horizontally moves to penetrate through the first sleeve 8 to enter a gas pipeline;

when the spray gun is to be disassembled and inspected on line, the spray head part is horizontally drawn out to the space corresponding to the lower part of the valve body 10 and the end part of the second sleeve 27 in the first cavity, the valve core 16 is driven to descend through the lever structure, so that the valve core 16 separates and breaks the first cavity, the second sleeve 27 is separated from the gas pipeline, the spray head part is further horizontally moved, so that the spray gun and the spray head part are drawn out to the outer side of the second sleeve 27, and the online disassembly and inspection and replacement are further carried out.

In a preferred embodiment, a plurality of support rings 7 are arranged in the gap along the axial direction of the inner tube 5 of the spray gun, and the support rings 7 are clamped outside the inner tube 5 of the spray gun. A plurality of support rings 7 are arranged between the inner pipe 5 and the outer pipe 6 of the spray gun, so that on one hand, the integral strength of the spray gun is enhanced, the bending deformation of the spray gun is prevented, on the other hand, a gas path channel can be solidified, the smoothness of fluid in a gap of gas is ensured, and the flow speed consistency of the gas in the gap is ensured.

In a preferred embodiment, the spray gun inner tube 5 comprises a first segment, a second segment and a telescopic compensation bellows 32 connected between the first segment and the second segment, the telescopic compensation bellows 32 is respectively communicated with the first segment and the second segment, one end of the first segment away from the second segment is connected with the infusion tube 38, and one end of the second segment away from the first segment is connected with the spray head connecting seat 1. In the preferred embodiment, a section of the spray gun inner tube 5 is provided with the elastic expansion compensation bellows 32, so that the thermal stress contraction of the tube body caused by the difference between the internal temperature and the external temperature of the spray gun inner tube 5 can be prevented, and the welding point and the welding opening between the spray gun inner tube 5 and the spray gun outer tube 6 are pulled to crack the welding opening, thereby protecting the spray gun inner tube 5.

In a preferred embodiment, the lever structure comprises a lower lever 19 and an upper lever 20, one end of the lower lever 19 is connected with one end of the valve core 16, the other end of the lower lever 19 is connected with one end of the upper lever 20, and the valve core 16 is lifted by lifting and moving the end of the upper lever 20 far away from the lower lever. In the preferred embodiment, one end of the upper lever 20 far away from the lower lever is lifted upwards, so that the lower lever 19 moves downwards to drive the valve core 16 to descend through the cylindrical pin 18; the end of the upper lever 20 remote from the lower lever 19 is pressed downwards so that the lower lever 19 moves upwards and the spool 16 is lifted by the cylindrical pin 18. In this embodiment, the valve body 10 and the valve core 16 can be tightly sealed by tightening the lock nut 12, the connection screw 13, the pressing piece 15 and the second sealing ring 14.

In a preferred embodiment, the distance between the upper and lower edges of the lance head is less than or equal to the outer diameter of the lance outer tube 6, and the upper edge of the lance head is flush with the upper edge of the lance outer tube 6 or lower than the upper edge of the lance outer tube 6. In the preferred embodiment, the nozzle head is arranged such that its upper and lower edges are flush with the upper and lower edges of the lance outer tube 6 or are located between the upper and lower edges of the lance outer tube 6 for the purpose of: as can be seen from fig. 1, since the apertures of the first through hole and the second through hole formed in the fixing flange 28 and the mounting flange 31 are the same as the pipe diameter of the outer pipe 6 of the spray gun, if the upper edge or the lower edge of the nozzle part protrudes out of the outer pipe 6 of the spray gun, the protruding edge of the nozzle part is blocked on the first through hole, so that the second sleeve 27 cannot be smoothly pulled out by the spray gun, which is not favorable for the smooth removal of the spray gun.

In a preferred embodiment, the air delivery pipe 39 and the infusion pipe 38 are respectively provided with a one-way valve 37. In the preferred embodiment, the check valve 37 is disposed on the air pipe 39 and the infusion pipe 38 to effectively prevent the medium from flowing back.

The principles and embodiments of the present application are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present application, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments, or may be learned by practice of the invention.

Claims

1. A double-medium spray gun for a blast furnace gas pipeline is characterized by comprising a spray mechanism and a connecting mechanism, wherein the spray mechanism comprises a spray gun outer pipe and a spray gun inner pipe sleeved in the spray gun outer pipe, and a gap is arranged between the inner wall of the spray gun outer pipe and the outer wall of the spray gun inner pipe corresponding to the inner wall of the spray gun outer pipe; one end of the spray gun outer pipe is provided with a liquid conveying pipe communicated with the spray gun inner pipe, the side wall of the spray gun outer pipe, which is close to the liquid conveying pipe, is connected with a gas conveying pipe, and the gas conveying pipe is communicated with the gap;

2. The dual media lance of claim 1, wherein a plurality of support rings are provided in the gap along the axial direction of the lance inner tube, and the support rings are clamped outside the lance inner tube.

3. The dual-media spray gun for the blast furnace gas pipeline according to claim 2, wherein the spray gun inner tube comprises a first segment body, a second segment body and a telescopic compensation corrugated pipe connected between the first segment body and the second segment body, the telescopic compensation corrugated pipe is respectively communicated with the first segment body and the second segment body, one end of the first segment body, far away from the second segment body, is connected with the liquid conveying pipe, and one end of the second segment body, far away from the first segment body, is connected with the spray head connecting seat.

4. The dual media lance of claim 1, wherein the lever structure comprises a lower lever and an upper lever, one end of the lower lever is connected with one end of the valve core, the other end of the lower lever is connected with one end of the upper lever, and the valve core is lifted by lifting and moving the end of the upper lever far away from the lower lever.

5. The dual media lance of claim 1, wherein the distance between the upper edge and the lower edge of the lance head is less than or equal to the outer diameter of the lance outer tube, and the upper edge of the lance head is flush with or lower than the upper edge of the lance outer tube.

6. The dual-media spray gun for the blast furnace gas pipeline according to claim 1, wherein the gas delivery pipe and the liquid delivery pipe are respectively provided with a one-way valve.