Sulfur dioxide corrosion test box

Abstract

The utility model discloses a sulfur dioxide corrosion test box which comprises a test box body, a gas inlet pipeline is arranged at the upper end of the test box body, a gas outlet pipeline is arranged at the lower end of the test box body, a sucking pump and a gas purification treatment device are sequentially arranged on the gas outlet pipeline in the gas flow direction, a gas inlet switching unit is arranged on the gas inlet pipeline, and a gas outlet switching unit is arranged on the gas outlet pipeline. A sulfur dioxide gas inlet pipe and an air inlet pipe are arranged on the gas inlet switching unit, and the gas inlet switching unit is arranged to be capable of switching the gas inlet pipeline to be communicated with the sulfur dioxide gas inlet pipe or the gas inlet pipeline to be communicated with the air inlet pipe. According to the sulfur dioxide corrosion test box, inlet air can be switched between sulfur dioxide and air, so that the sulfur dioxide or the air in the inner cavity of the test box body can be conveniently emptied.

Description

TECHNICAL FIELD

[0001] The utility model relates to a test box, specifically, a kind of sulfur dioxide corrosion test box. BACKGROUND

[0002] Gas corrosion test box is used to carry out gas corrosion test on test piece, to test the corrosion resistance of test piece in specified gas environment, for example, when the specified gas is sulfur dioxide gas, the gas corrosion test box is sulfur dioxide corrosion test box, and sulfur dioxide gas needs to be introduced into the test box body during test.

[0003] Chinese patent CN201920167597.7 discloses a kind of sulfur dioxide corrosion test box, and its technical scheme points are including test box main body, also including purification device, the purification device includes outer box, transparent plastic box, box cover and first activated carbon filter screen, the outer box is connected with test box main body by purification pipe, first air pump is provided on purification pipe, the transparent plastic box is arranged in outer box, and the transparent plastic box is filled with sodium hydroxide solution, the outer box is provided with observation port for observing sodium hydroxide solution level, the first activated carbon filter screen is arranged in outer box, the box cover is detachably connected with outer box, and the box cover is provided with exhaust pipe.

[0004] The sulfur dioxide corrosion test box can only discharge the discharged sulfur dioxide gas after purification by purification device, and the sulfur dioxide gas is directly introduced into the test box main body through the introduction pipe, without the function of introducing air, and the emptying effect of the residual sulfur dioxide gas in the test box main body is poor after test, which can cause sulfur dioxide gas to be emitted when the test box main body is opened to take the test piece. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of sulfur dioxide corrosion test box, which can switch between sulfur dioxide and air for inlet gas, to facilitate the emptying of sulfur dioxide or air in the cavity of test box body.

[0006] To achieve the above-mentioned purpose, the utility model provides a kind of sulfur dioxide corrosion test box, including test box body, the upper end of the test box body is provided with inlet pipeline, and the lower end is provided with outlet pipeline, the outlet pipeline is sequentially provided with suction pump and gas purification treatment device along the direction of air flow, the inlet pipeline is provided with inlet switching unit, the inlet switching unit is provided with sulfur dioxide inlet pipe and air inlet pipe, and the inlet switching unit is set to be able to switch the inlet pipeline and the sulfur dioxide inlet pipe communication or inlet pipeline and the air inlet pipe communication.

[0007] Preferably, the air inlet switching unit comprises a fixed block, a rectangular sliding hole penetrating front and back is arranged in the middle of the fixed block, a valve block is slidingly arranged in the rectangular sliding hole; one side of the fixed block is provided with an air outlet nozzle communicating with the rectangular sliding hole and the air inlet pipeline, the other side of the fixed block is provided with a first air inlet nozzle communicating with the rectangular sliding hole and the sulfur dioxide inlet pipe and a second air inlet nozzle communicating with the rectangular sliding hole and the air inlet pipe; a rectangular cavity is arranged in the middle of the valve block, a first air outlet hole and a second air outlet hole are arranged on the side of the rectangular cavity facing the air outlet nozzle, a first air inlet hole and a second air inlet hole are arranged on the side of the rectangular cavity away from the air outlet nozzle; the first air outlet hole is coaxially arranged with the second air inlet hole, and the second air outlet hole is coaxially arranged with the first air inlet hole.

[0008] Preferably, a gas cylinder is arranged on the outer side of the fixed block, a U-shaped rod is connected to the shaft end of the gas cylinder, and the end of the U-shaped rod away from the gas cylinder is connected to the end of the valve block.

[0009] Preferably, a side ear is fixed to the circumferential side of the fixed block, and a mounting hole is arranged on the side ear.

[0010] Preferably, a booster pump is arranged on the sulfur dioxide inlet pipe.

[0011] According to the above technical scheme, the utility model provides a sulfur dioxide corrosion test box, which comprises a test box body, an air inlet pipeline is arranged on the upper end of the test box body, an air outlet pipeline is arranged on the lower end of the test box body, a suction pump and a gas purification treatment device are sequentially arranged on the air outlet pipeline along the air flow direction, an air inlet switching unit is arranged on the air inlet pipeline, a sulfur dioxide inlet pipe and an air inlet pipe are arranged on the air inlet switching unit, and the air inlet switching unit is arranged to be capable of switching the air inlet pipeline to be communicated with the sulfur dioxide inlet pipe or the air inlet pipeline to be communicated with the air inlet pipe.

[0012] The use mode of the sulfur dioxide corrosion test box is as follows: when sulfur dioxide corrosion test is needed, a test piece is placed in the test box body, the suction pump is started, the air inlet pipeline is switched to be communicated with the sulfur dioxide inlet pipe through the air inlet switching unit, sulfur dioxide gas enters the test box body, the original air in the test box body is discharged as the sulfur dioxide gas increases, so that the sulfur dioxide gas in the test box body has sufficient density to meet the sulfur dioxide corrosion test. When the test is completed, the air inlet pipeline is switched to be communicated with the air inlet pipe through the air inlet switching unit, air enters the test box body, the sulfur dioxide gas in the test box body is discharged as the air increases, and then the test piece is taken out by opening the test box body. The sulfur dioxide gas discharged through the air outlet pipeline is purified through the gas purification treatment device before being discharged, so as to increase the environmental protection effect.

[0013] The sulfur dioxide corrosion test box can switch the inlet gas between sulfur dioxide and air, facilitate emptying the sulfur dioxide or air in the inner cavity of the test box body, thereby increasing the sufficient sulfur dioxide density during the test, and avoiding the sulfur dioxide gas flowing out to cause environmental pollution when the test piece is taken out.

[0014] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0016] Figure 1 is a structure diagram of a preferred embodiment of the sulfur dioxide corrosion test box;

[0017] Figure 2 is a schematic diagram of the overall structure of a preferred embodiment of the inlet gas switching unit;

[0018] Figure 3 is a schematic diagram of the side structure of a preferred embodiment of the inlet gas switching unit;

[0019] Figure 4 is Figure 3 A-A cross-sectional structure schematic diagram of

[0020] Explanation of reference signs

[0021] 1-test box body; 2-inlet gas pipeline; 3-inlet gas switching unit; 4-sulfur dioxide inlet pipe; 5-boosting pump; 6-air inlet pipe; 7-outlet gas pipeline; 8-gas purification treatment device; 9-pumping pump; 301-fixed block; 302-cylinder; 303-outlet nozzle; 304-rectangular sliding hole; 305-first inlet nozzle; 306-second inlet nozzle; 307-side ear; 308-U-shaped rod; 309-valve block; 310-rectangular cavity; 3091-first outlet hole; 3092-first inlet hole; 3093-second outlet hole; 3094-second inlet hole. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0023] In the utility model, in the case that no opposite statement is made, the orientation words such as up, down, left, right, front, back, inside and outside contained in the term only represent the orientation of the term in the normal use state, or the common name understood by the person skilled in the art, and should not be regarded as the limitation of the term.

[0024] Referring to Figures 1-4 The sulfur dioxide corrosion test box shown in the figure, including test box body 1, the upper end of test box body 1 is provided with air inlet pipeline 2, the lower end is provided with air outlet pipeline 7, air outlet pipeline 7 is provided with air suction pump 9 and gas purification treatment device 8 in turn along the air flow direction, air inlet pipeline 2 is provided with air inlet switching unit 3, air inlet switching unit 3 is provided with sulfur dioxide inlet pipe 4 and air inlet pipe 6, air inlet switching unit 3 is arranged to be able to switch the communication of air inlet pipeline 2 and sulfur dioxide inlet pipe 4 or air inlet pipeline 2 and air inlet pipe 6.

[0025] Through the implementation of the above technical scheme, when the sulfur dioxide corrosion test needs to be carried out, the test piece is placed in the test box body 1, the air suction pump 9 is started, and the air inlet pipeline 2 is switched to communicate with the sulfur dioxide inlet pipe 4 through the air inlet switching unit 3, so that the sulfur dioxide gas enters the test box body 1, and as the sulfur dioxide gas increases, the original air in the test box body 1 is discharged, so that the sulfur dioxide gas in the test box body 1 has sufficient density to meet the sulfur dioxide corrosion test. When the test is completed, the air inlet pipeline 2 is switched to communicate with the air inlet pipe 6 through the air inlet switching unit 3, so that air enters the test box body 1, and as the air increases, the sulfur dioxide gas in the test box body 1 is discharged, and then the test box body 1 is opened to take out the test piece. The sulfur dioxide gas discharged through the air outlet pipeline 7 is purified through the gas purification treatment device 8 before being discharged, so as to increase the environmental protection effect.

[0026] The sulfur dioxide corrosion test box improves the air inlet and air outlet of the test box, so that the sulfur dioxide corrosion test box can switch the air inlet between sulfur dioxide and air, facilitate the emptying of sulfur dioxide or air in the cavity of the test box body 1, thereby increasing the sufficient sulfur dioxide density during the test, and avoiding the flow of sulfur dioxide gas to cause environmental pollution when the test piece is taken out. The gas purification treatment device 8 in the utility model uses any device capable of treating sulfur dioxide gas in the art, for example, the sulfur dioxide gas treatment device disclosed in the existing published patent CN201721100687.1.

[0027] In this embodiment, in order to further provide an air intake switching unit 3, the air intake switching unit 3 comprises a fixed block 301, a rectangular sliding hole 304 is arranged in the middle of the fixed block 301 and extends front and back, and a valve block 309 is arranged in the rectangular sliding hole 304; one side of the fixed block 301 is provided with an air outlet nozzle 303 which communicates with the rectangular sliding hole 304 and the air intake pipeline 2, the other side of the fixed block 301 is provided with a first air inlet nozzle 305 which communicates with the rectangular sliding hole 304 and the sulfur dioxide air intake pipe 4, and a second air inlet nozzle 306 which communicates with the rectangular sliding hole 304 and the air intake pipe 6; the middle of the valve block 309 is provided with a rectangular cavity 310, the side of the rectangular cavity 310 facing the air outlet nozzle 303 is provided with a first air outlet hole 3091 and a second air outlet hole 3093, and the side of the rectangular cavity 310 facing away from the air outlet nozzle 303 is provided with a first air inlet hole 3092 and a second air inlet hole 3094; the first air outlet hole 3091 is coaxially arranged with the second air inlet hole 3094, and the second air outlet hole 3093 is coaxially arranged with the first air inlet hole 3092.

[0028] By sliding the valve block 309, when the first air outlet hole 3091 is aligned with the air outlet nozzle 303, and at the same time the first air inlet hole 3092 is aligned with the first air inlet nozzle 305, the sulfur dioxide gas enters the test box body 1 in sequence through the sulfur dioxide air intake pipe 4, the first air inlet nozzle 305, the first air inlet hole 3092, the rectangular cavity 310, the first air outlet hole 3091, the air outlet nozzle 303 and the air intake pipeline 2.

[0029] When the second air outlet hole 3093 is aligned with the air outlet nozzle 303, and at the same time the second air inlet hole 3094 is aligned with the second air inlet nozzle 306, the air enters the test box body 1 in sequence through the air intake pipe 6, the second air inlet nozzle 306, the second air inlet hole 3094, the rectangular cavity 310, the second air outlet hole 3093, the air outlet nozzle 303 and the air intake pipeline 2.

[0030] In this embodiment, the outer side of the fixed block 301 is provided with a gas cylinder 302, the shaft end of the gas cylinder 302 is connected with a U-shaped rod 308, and the end of the U-shaped rod 308 away from the gas cylinder 302 is connected with the end of the valve block 309. By using the gas cylinder 302 as the driving force for moving the valve block 309, the valve block 309 is driven to move in position under the linkage of the U-shaped rod 308.

[0031] In this embodiment, the circumferential side of the fixed block 301 is fixedly connected with an edge lug 307, and the edge lug 307 is provided with a mounting hole. By such arrangement, the fixed block 301 can be mounted on the outer side of the test box body 1 through the edge lug 307 and bolts.

[0032] In the embodiment, the sulfur dioxide gas inlet pipe 4 is provided with a booster pump 5. The sulfur dioxide gas is pressurized by the booster pump 5, so that the adding efficiency of the sulfur dioxide gas is improved, and the pressure of the sulfur dioxide gas added into the test box body 1 is increased by the booster pump 5, so as to meet the test requirements of different pressure environments.

[0033] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0034] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners.

[0035] In addition, various different embodiments of the present application can also be combined in any manner, as long as they do not deviate from the technical concept of the present application, and they should also be considered as disclosed content of the present application.

Claims

1. A sulfur dioxide corrosion test chamber, characterized in that: The invention comprises a test box body (1), wherein an air inlet pipeline (2) is provided at the upper end of the test box body (1), and an air outlet pipeline (7) is provided at the lower end, and an air pump (9) and a gas purification treatment device (8) are sequentially provided on the air outlet pipeline (7) along the air flow direction, an air inlet switching unit (3) is provided on the air inlet pipeline (2), and a sulfur dioxide inlet pipe (4) and an air inlet pipe (6) are provided on the air inlet switching unit (3), and the air inlet switching unit (3) is configured to switch the air inlet pipeline (2) to be connected to the sulfur dioxide inlet pipe (4) or to switch the air inlet pipeline (2) to be connected to the air inlet pipe (6).

2. The sulfur dioxide corrosion test chamber according to claim 1, characterized in that: The air intake switching unit (3) comprises a fixed block (301), a rectangular sliding hole (304) penetrating from front to back is provided in the middle of the fixed block (301), and a valve block (309) is slidably provided in the rectangular sliding hole (304); An air outlet nozzle (303) communicating with the rectangular sliding hole (304) and the air inlet line (2) is provided on one side of the fixing block (301); a first air inlet nozzle (305) communicating with the rectangular sliding hole (304) and the sulfur dioxide inlet pipe (4) and a second air inlet nozzle (306) communicating with the rectangular sliding hole (304) and the air inlet pipe (6) are provided on the other side of the fixing block (301); A rectangular cavity (310) is provided in the middle of the valve block (309); a first air outlet (3091) and a second air outlet (3093) are provided on the side of the rectangular cavity (310) facing the air outlet nozzle (303); and a first air inlet (3092) and a second air inlet (3094) are provided on the side of the rectangular cavity (310) facing away from the air outlet nozzle (303); The first air outlet (3091) and the second air inlet (3094) are coaxially arranged, and the second air outlet (3093) and the first air inlet (3092) are coaxially arranged.

3. The sulfur dioxide corrosion test chamber according to claim 2, characterized in that: A cylinder (302) is provided on the outside of the fixed block (301); The shaft end of the cylinder (302) is connected to a U-shaped rod (308), and one end of the U-shaped rod (308) away from the cylinder (302) is connected to the end of the valve block (309).

4. The sulfur dioxide corrosion test chamber according to claim 2, characterized in that: A side ear (307) is fixedly connected to the peripheral side of the fixing block (301), and a mounting hole is provided on the side ear (307).

5. The sulfur dioxide corrosion test chamber according to claim 1, characterized in that: A booster pump (5) is provided on the sulfur dioxide inlet pipe (4).

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