A closed concentrated sulfuric acid sampler

Abstract

The utility model relates to a kind of closed concentrated sulphuric acid sampler, and the purpose is to solve the technical problem that concentrated sulphuric acid detection is not accurate due to the opening of existing concentrated sulphuric acid sampler.The technical scheme is as follows:it includes pedal, cylinder, uncovering device, sealing cover and two drainage tubes, the cylinder is fixed on the bottom plate, the pedal is obliquely arranged on the bottom plate, the lower end is hinged to the bottom plate through torsion spring hinge, the upper end is provided with extension plate, the extension plate extends to both sides of the cylinder, two semicircular sealing covers are hinged to the sidewall of the cylinder, the top drainage tube extends into the cylinder, the bottom drainage tube horizontally extends into the sidewall bottom of the cylinder, the uncovering device includes traction rope, fixed pulley and pulley bracket, the pulley bracket is fixed on the outer sidewall of the cylinder, the fixed pulley is arranged on the pulley bracket, the traction rope is fixedly connected with lower fixed end, upper fixed end and extension plate respectively, the sealing cover is opened after the pedal is stepped, the pedal and sealing cover are automatically reset after the force is removed, time and labor are saved, and it is automatic and efficient.

Description

Technical Field

[0001] This utility model belongs to the field of concentrated sulfuric acid sampling technology, specifically relating to a closed concentrated sulfuric acid sampler. Background Technology

[0002] In modern sulfuric acid production, the dry absorption process involves absorbing sulfur trioxide-containing gas from the conversion process into concentrated sulfuric acid, thus producing the finished acid. The concentration of the 93% sulfuric acid is controlled between 93% and 93.5%, and the concentration of the 98% sulfuric acid is controlled between 98% and 98.5%. To strictly control the concentration and quality of the concentrated sulfuric acid, samples need to be taken regularly from the drying circulation tank, the primary absorption circulation tank, and the secondary absorption circulation tank for testing.

[0003] Traditional concentrated sulfuric acid sampling involves connecting a thin tube to the outlet of a concentrated sulfuric acid pump, installing a control valve on the tube, and diverting the concentrated sulfuric acid to an open container at the top. A drain tube is installed at the bottom of the container to introduce the concentrated sulfuric acid into a circulation tank. During sampling, a person manually collects the concentrated sulfuric acid sample from the open container using a volumetric flask with a long handle.

[0004] While CN217520792U achieves closed sampling, opening the cap requires manual operation, posing a risk of acid mist exposure. CN201212859Y uses an open acid sampler, making the acid concentration susceptible to air humidity. In traditional concentrated sulfuric acid sampling operations, the open design of the sample container at the top can easily cause concentrated sulfuric acid to splash and injure people. Turbid substances in the air can enter and contaminate the concentrated sulfuric acid, reducing its quality. Furthermore, prolonged exposure of concentrated sulfuric acid to air can cause it to absorb moisture, resulting in inaccurate test results. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide a sealed concentrated sulfuric acid sampler.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A sealed concentrated sulfuric acid sampler includes a pedal, a cylinder, two sets of opening devices, a bottom drain tube, two sealing caps, and a top drain tube. The cylinder is vertically fixed on a base plate. The pedal is inclinedly set on the base plate on one side of the cylinder, with its lower end hinged to the base plate via a torsion spring hinge. Two extension plates are horizontally arranged on both sides of the upper end, with the other end of the extension plates extending to both sides of the cylinder. The sealing caps are semi-circular in structure, with two semi-circular sealing caps located at the upper part of the cylinder. The outer ends of the two sealing caps are hinged to the side wall of the cylinder via a sealing cap pivot. The lower end of the top drain tube passes through the middle of the two sealing caps, extends into the cylinder, and is vertically fixed. The bottom drain tube extends horizontally into the bottom of the side wall of the cylinder on the other side of the pedal.

[0008] The opening device includes a traction rope, a fixed pulley, and a pulley bracket. The pulley bracket is fixed on both sides of the outer wall of the cylinder. The fixed pulley is mounted on the pulley bracket via a pulley shaft and is higher than the top surface of the cylinder. The lower end of the traction rope is connected to the lower fixed end of the traction rope at the bottom of the side wall of the cylinder, and the middle part is fixedly connected to the extension plate of the pedal. After passing around the fixed pulley, the upper end of the traction rope is connected to the upper fixed end of the traction rope in the middle of the sealing cover. The two sets of opening devices are symmetrically arranged on both sides of the outer wall of the cylinder.

[0009] The upper end of the top drain pipe is connected to the concentrated sulfuric acid pump of the concentrated sulfuric acid circulation tank, and the bottom drain pipe is connected to the concentrated sulfuric acid circulation tank.

[0010] Furthermore, a sealing cap limiting ring is provided on the upper part of the inner wall of the cylinder, so that the sealing cap is in a horizontal state when closed.

[0011] Furthermore, the sealing cap and the sealing cap limiting ring are made of stainless steel, with a layer of perfluoroether rubber sealing layer wrapped on the outside.

[0012] Furthermore, a wedge-shaped sealing strip is provided at the joint of the two sealing caps, the bottom of which fits against the outer curved surface of the top drainage pipe, and a sealing strip is provided between the bottom drainage pipe and the cylinder.

[0013] Furthermore, the upper fixed end of the traction rope is located 5mm outside the vertical line of the center of gravity of the sealing cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The sealing cap of this utility model is always in a sealed state, which avoids splashing concentrated sulfuric acid and causing injury, prevents turbidity in the air from entering and contaminating the concentrated sulfuric acid, and prevents air from directly contacting the concentrated sulfuric acid, diluting the concentration of the concentrated sulfuric acid and causing inaccurate test results.

[0016] 2. This utility model utilizes the self-weight of the sealing cap to generate extrusion force, eliminating the need for additional springs / cylinders. The wedge-shaped sealing strip automatically compensates for wear during the opening process. When the traction rope breaks, the sealing cap can automatically close under the action of gravity.

[0017] 3. The sealing cover of this utility model opens after the pedal is stepped on, and the pedal and sealing cover automatically reset after the force is released, which saves time and effort and is automatic and efficient.

[0018] 4. When sampling, the sealing cover can be opened by simply stepping on the pedal, avoiding direct contact between the hand and the sampler and improving the safety of operation;

[0019] 5. This utility model has a simple structure, is easy to use, requires no power device, has a low failure rate, low cost, and is safe and reliable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0022] Figure 3 This is a partial cross-sectional view of the present invention;

[0023] In the diagram: 1-Pedal; 2-Base plate; 3-Cylinder body; 4-Lower fixed end of traction rope; 5-Traction rope; 6-Bottom drainage pipe; 7-Sealing cover shaft; 8-Sealing cover; 9-Upper fixed end of traction rope; 10-Top drainage pipe; 11-Fixed pulley; 12-Pulley shaft; 13-Pulley bracket; 14-Torsion spring hinge; 15-Sealing cover limit ring. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0025] like Figure 1-3 As shown, a sealed concentrated sulfuric acid sampler includes a pedal 1, a cylinder 3, two sets of opening devices, a bottom drainage tube 6, two sealing caps 8, and a top drainage tube 10. The cylinder 3 is vertically fixed on a base plate 2. The pedal 1 is inclinedly disposed on the base plate 2 on one side of the cylinder 3, and its lower end is hinged to the base plate 2 by a torsion spring hinge 14. Two extension plates are horizontally disposed on both sides of the upper end, and the other ends of the extension plates extend to both sides of the cylinder 3. The sealing caps 8 are semi-circular structures, and the two semi-circular sealing caps 8 are disposed inside the upper part of the cylinder 3, and the outer ends of the two sealing caps 8 are hinged to the side wall of the cylinder 3 by a sealing cap pivot 7. A wedge-shaped sealing strip is provided at the joint of the two sealing caps 8. The bottom of the sealing strip fits against the curved surface of the outer wall of the top drainage pipe 10. A sealing cap limiting ring 15 is provided on the upper part of the inner side wall of the cylinder 3 so that the sealing cap 8 is in a horizontal state when closed. The sealing cap 8 and the sealing cap limiting ring 15 are made of stainless steel base and wrapped with a layer of perfluoroether rubber sealing layer on the outside. The lower end of the top drainage pipe 10 passes through the middle of the two sealing caps 8 and extends into the cylinder 3 and is vertically fixed. The bottom drainage pipe 6 extends horizontally into the bottom of the side wall of the cylinder 3 on the other side of the pedal 1. A sealing strip is provided between the bottom drainage pipe 6 and the cylinder 3.

[0026] The opening device includes a traction rope 5, a fixed pulley 11, and a pulley bracket 13. The pulley bracket 13 is fixed on both sides of the outer wall of the cylinder 3. The fixed pulley 11 is mounted on the pulley bracket 13 via a pulley shaft 12, and the fixed pulley 11 is higher than the top surface of the cylinder 3. The lower end of the traction rope 5 is connected to the lower fixed end 4 of the traction rope at the bottom of the side wall of the cylinder 3, and the middle part is fixedly connected to the extension plate of the pedal 1. After passing around the fixed pulley 11, the upper end of the traction rope 5 is connected to the upper fixed end 9 of the traction rope in the middle of the sealing cover 8. The two sets of opening devices are symmetrically arranged on both sides of the outer wall of the cylinder 3. The upper fixed end 9 of the traction rope is located 5mm outside the vertical line of the center of gravity of the sealing cover 8, so that the two covers generate an inward squeezing force when opening the cover, and the sealing strip continuously presses the top drainage pipe 10 to achieve dynamic sealing.

[0027] The upper end of the top drain pipe 10 is connected to the concentrated sulfuric acid pump of the concentrated sulfuric acid circulation tank, and the bottom drain pipe 6 is connected to the concentrated sulfuric acid circulation tank.

[0028] Tests showed that when the lid was opened to 30°, the compressive force between the sealing caps reached 3.2N, and the acid mist emission rate was 0.85mg / m³ (HJ544-2016 method), which is 94% lower than that of traditional open containers (15mg / m³).

[0029] Before using this utility model, adjust the tension of the traction rope 5, connect the top drainage pipe 10 and the bottom drainage pipe 6, and the concentrated sulfuric acid enters the cylinder 3 from the circulation tank through the concentrated sulfuric acid pump along the top drainage pipe 10, and then returns to the circulation tank along the bottom drainage pipe 6, forming a flow circulation of concentrated sulfuric acid. At this time, the sealing cap 8 is in a sealed state, which can prevent concentrated sulfuric acid from splashing and injuring people. At the same time, it can prevent turbidity in the air from entering and contaminating the concentrated sulfuric acid, reducing the quality of sulfuric acid. Moreover, it can prevent concentrated sulfuric acid from being exposed to the air for a long time, absorbing moisture from the air and causing the acid concentration to deviate, resulting in inaccurate test results.

[0030] When sampling is required, the operator steps on pedal 1 with his foot. Pedal 1 moves downward, and the extension plate in front drives the traction rope 5 to move downward. The traction rope 5 pulls the sealing cap 8 through the fixed pulley 11 to rotate around the sealing cap shaft 7 and open upward. At this time, the operator manually holds the volumetric flask with a long handle to collect the concentrated sulfuric acid sample in the cylinder 3.

[0031] After sampling, release pedal 1. Pedal 1 returns to its original position under the action of torsion spring hinge 14. At the same time, release traction rope 5. Sealing cover 8 falls back to its original position under its own weight and closes automatically. Sealing cover limit ring 15 can prevent sealing cover 8 from falling beyond its original position.

Claims

1. A closed concentrated sulfuric acid sampler characterized by, Includes a pedal (1), a cylinder (3), two sets of opening devices, a bottom drain pipe (6), two sealing caps (8) and a top drain pipe (10). The cylinder (3) is vertically fixed on the base plate (2). The pedal (1) is inclinedly set on the base plate (2) on one side of the cylinder (3). The lower end is hinged to the base plate (2) by a torsion spring hinge (14). Two extension plates are horizontally provided on both sides of the upper end. The other end of the extension plates extends to both sides of the cylinder (3). The sealing cap (8) is a semi-circular structure. The two semi-circular sealing caps (8) are set in the upper part of the cylinder (3). The outer ends of the two sealing caps (8) are hinged to the side wall of the cylinder (3) through the sealing cap pivot (7). The lower end of the top drain pipe (10) passes through the middle of the two sealing caps (8) and extends into the cylinder (3) and is vertically fixed. The bottom drain pipe (6) extends horizontally into the bottom of the side wall of the cylinder (3) on the other side of the pedal (1). The opening device includes a traction rope (5), a fixed pulley (11) and a pulley bracket (13). The pulley bracket (13) is fixed on both sides of the outer wall of the cylinder (3). The fixed pulley (11) is mounted on the pulley bracket (13) through the pulley shaft (12), and the fixed pulley (11) is higher than the top surface of the cylinder (3). The lower end of the traction rope (5) is connected to the lower fixed end (4) of the traction rope at the bottom of the side wall of the cylinder (3), and the middle part is fixedly connected to the extension plate of the pedal (1). After passing around the fixed pulley (11), the upper end of the traction rope (5) is connected to the upper fixed end (9) of the traction rope in the middle of the sealing cover (8). The upper fixed end (9) of the traction rope is located 5mm away from the center axis of the cylinder from the vertical line of the center of gravity of the sealing cover (8). The two sets of opening devices are symmetrically arranged on both sides of the outer wall of the cylinder (3). The upper end of the top drain pipe (10) is connected to the concentrated sulfuric acid pump of the concentrated sulfuric acid circulation tank, and the bottom drain pipe (6) is connected to the concentrated sulfuric acid circulation tank.

2. A closed concentrated sulfuric acid sampler according to claim 1, characterized in that The inner wall of the cylinder (3) is provided with a sealing cap limiting ring (15) so that the sealing cap (8) is in a horizontal state when closed.

3. A closed concentrated sulfuric acid sampler according to claim 2, characterized in that The sealing cap (8) and the sealing cap limiting ring (15) are made of stainless steel base and wrapped with a layer of perfluoroether rubber sealing layer on the outside.

4. A closed concentrated sulfuric acid sampler according to claim 1, characterized in that A wedge-shaped sealing strip is provided at the joint of the two sealing caps (8). The bottom of the sealing strip is in contact with the outer curved surface of the top drain pipe (10). A sealing strip is provided between the bottom drain pipe (6) and the cylinder (3).

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