Sample processor

Abstract

The utility model discloses a sample processor, which comprises a gas-guide tube, a valve core and a cavity, one end of the gas-guide tube is communicated with the atmosphere, and the other end of the gas-guide tube is provided with a piston component; the piston component can be inserted into the cavity, a liquid storage cavity is defined by the piston component and the cavity, the liquid storage cavity can contain an MMP crude product, and the piston component inserted into the cavity can slide along the inner wall of the cavity so as to change the volume of the liquid storage cavity; the valve element is installed on the air guide pipe, when the valve element is in an open state, the liquid storage cavity is communicated with the atmosphere through the air guide pipe, and when the valve element is in a closed state, the liquid storage cavity is isolated from the atmosphere. Excessive hydrogen sulfide gas in an MMP crude product is effectively removed, and the problem that a sample cannot be effectively sucked in the existing MMP crude product analysis and detection process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sample processors, in particular to a sample processor. Background Art

[0002] Methyl 3-mercaptopropionate (MMP for short) is an important raw material for isothiazolinone industrial fungicides OIT and DCOIT. The current production process uses methyl acrylate and excess hydrogen sulfide as raw materials, and obtains MMP after catalytic addition. Excess hydrogen sulfide is dissolved in the obtained MMP crude product.

[0003] When this crude MMP product containing hydrogen sulfide gas is detected by gas chromatography, hydrogen sulfide will be released from the crude MMP product due to the negative pressure extraction of the gas injector, resulting in most of the gas injector being hydrogen sulfide gas. The sample that actually enters the gas chromatography vaporization chamber (liquid crude MMP product) is quite limited, which can easily lead to analysis failure. Summary of the invention

[0004] The utility model provides a sample processor to effectively remove excess hydrogen sulfide gas in a crude MMP product, thereby overcoming the problem that the sample cannot be effectively absorbed during the current analysis and detection process of the crude MMP product.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A sample processor comprises an air guide tube, a valve core and a cavity, wherein one end of the air guide tube is connected to the atmosphere and the other end of the air guide tube is provided with a piston component;

[0007] The piston component can be inserted into the cavity to form a liquid storage cavity with the cavity, and the liquid storage cavity can accommodate the crude MMP product. The piston component inserted into the cavity can slide along the inner wall of the cavity to change the volume of the liquid storage cavity;

[0008] The valve core is installed on the air guide pipe. When the valve core is in an open state, the liquid storage chamber is connected to the atmosphere through the air guide pipe. When the valve core is in a closed state, the liquid storage chamber is isolated from the atmosphere.

[0009] Furthermore, the piston component includes a piston plate and a sealing ring, wherein the piston plate is fixed to the outer periphery of the air guide tube, and the sealing ring is sleeved on the outer periphery of the piston plate, and the outer periphery of the sealing ring can abut against the inner wall of the cavity.

[0010] Furthermore, a valve core mounting portion is provided on the air guide pipe, the valve core is arranged on the valve core mounting portion, the valve core can rotate relative to the valve core mounting portion, and an air guide hole is opened on the valve core;

[0011] When the valve core rotates until the air guide hole is connected to the air guide tube, the valve core is in an open state, and when the valve core rotates until the air guide hole is isolated from the air guide tube, the valve core is in a closed state.

[0012] Furthermore, the piston component can be pulled out from the cavity.

[0013] Furthermore, a knob is provided on the valve core.

[0014] Furthermore, both ends of the sealing ring are provided with limiting parts, and the piston plate is located between the limiting parts at both ends of the sealing ring.

[0015] Furthermore, the bottom of the cavity is hemispherical.

[0016] Beneficial effects:

[0017] The utility model provides a sample processor, when it is necessary to release the excess hydrogen sulfide in the crude MMP product, the liquid storage chamber is isolated from the atmosphere by closing the valve core, and the volume of the liquid storage chamber is increased by sliding the piston component along the cavity, so that a negative pressure is formed in the liquid storage chamber, thereby promoting the release of hydrogen sulfide in the crude MMP product;

[0018] When it is necessary to discharge the excess hydrogen sulfide in the crude MMP product, the valve core is opened to connect the liquid storage chamber to the atmosphere, and the piston component is made to slide along the cavity to reduce the volume of the liquid storage chamber, so that the hydrogen sulfide released from the crude MMP product is discharged from the liquid storage chamber;

[0019] The utility model provides a sample processor which effectively promotes the release and discharge of excess hydrogen sulfide in a crude MMP product, thereby avoiding the problem of unsuccessful sample aspiration in a crude product gas chromatography analysis test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a structural schematic diagram of a sample processor disclosed in the utility model;

[0022] Figure 2 It is a cross-sectional view of a sample processor disclosed in the utility model;

[0023] Figure 3 It is a top view schematic diagram of a sample processor disclosed in the utility model when the valve core is in a closed state;

[0024] Figure 4 It is a cross-sectional schematic diagram of a sample processor disclosed in the utility model when the valve core is in a closed state;

[0025] Figure 5 It is a top view schematic diagram of a sample processor disclosed in the utility model when the valve core is in an open state;

[0026] Figure 6 It is a cross-sectional schematic diagram of a sample processor disclosed in the utility model when the valve core is in an open state;

[0027] Figure 7 for Figure 2 BB cross-sectional view.

[0028] In the figure:

[0029] 1. Air guide pipe; 11. Valve core installation part;

[0030] 2. Valve core; 21. Air guide hole; 22. Knob;

[0031] 3. Sealing ring;

[0032] 4. Cavity;

[0033] 5. Piston plate;

[0034] 6. Limiting part;

[0035] A. MMP crude product. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] This embodiment provides a sample processor, such as Figure 1 As shown, it comprises an air guide tube 1, a valve core 2 and a cavity 4, wherein both ends of the air guide tube 1 are open, one end of the air guide tube 1 is connected to the atmosphere, and the other end of the air guide tube 1 is provided with a piston component;

[0038] The piston component can be inserted into the cavity 4 to form a liquid storage cavity with the cavity 4. Figure 2 As shown, the liquid storage chamber can accommodate the MMP crude product A, and the piston component inserted into the cavity 4 can slide along the inner wall of the cavity 4 to change the volume of the liquid storage chamber;

[0039] like Figure 2 As shown, the valve core 2 is installed on the air guide tube 1. When the valve core 2 is in an open state, the liquid storage chamber is connected to the atmosphere through the air guide tube 1. When the valve core 2 is in a closed state, the liquid storage chamber is isolated from the atmosphere.

[0040] The sample processor provided in this embodiment allows crude MMP to be added into the cavity 4 by pulling out the piston component from the cavity 4;

[0041] When the excess hydrogen sulfide in the crude MMP product A needs to be released, the liquid storage chamber is isolated from the atmosphere by closing the valve core 2, and the volume of the liquid storage chamber is increased by sliding the piston member along the cavity 4, so that a negative pressure is formed in the liquid storage chamber, thereby promoting the release of hydrogen sulfide in the crude MMP product A;

[0042] When it is necessary to discharge the excess hydrogen sulfide in the crude MMP product A, the valve core 2 is opened to connect the liquid storage chamber to the atmosphere, and the piston member is made to slide along the cavity 4 to reduce the volume of the liquid storage chamber, so that the hydrogen sulfide released from the crude MMP product A is discharged from the liquid storage chamber;

[0043] The sample processor provided in this embodiment has a simple structure and is easy to operate. It effectively promotes the release and discharge of excess hydrogen sulfide in the crude MMP product A, thereby avoiding the problem of unsuccessful sample aspiration in the crude product gas chromatography analysis.

[0044] When the untreated crude MMP product is directly extracted by negative pressure using a gas injector, the released hydrogen sulfide gas will be discharged into the laboratory. Due to its unique odor similar to that of rotten eggs and its low olfactory threshold, it is easy to cause discomfort to the experimenters. The sample processor provided in this embodiment can directly discharge the hydrogen sulfide by opening the valve core 2 in the fume hood or at the vent when it is necessary to discharge the hydrogen sulfide. The end of the air guide tube 1 away from the piston component can also be connected to a pipeline, and the hydrogen sulfide can be passed into the alkaline solution through the pipeline for absorption to avoid hydrogen sulfide polluting the laboratory environment.

[0045] In a specific embodiment, Figure 2 As shown, the piston component includes a piston plate 5 and a sealing ring 3. The piston plate 5 is fixed to the outer periphery of the air duct 1. In the present embodiment, the piston plate 5 and the air duct 1 are integrally formed. The sealing ring 3 is sleeved on the outer periphery of the piston plate 5. The outer periphery of the sealing ring 3 can abut against the inner wall of the cavity 4 to provide sealing for the liquid storage cavity.

[0046] In a specific embodiment, Figures 2 to 6 As shown, the air guide pipe 1 is provided with a valve core mounting portion 11, the valve core 2 is arranged on the valve core mounting portion 11, the valve core 2 can rotate relative to the valve core mounting portion 11, and the valve core 2 is provided with an air guide hole 21;

[0047] like Figure 5 and Figure 6 As shown, when the valve core 2 rotates until the air guide hole 21 is connected to the air guide pipe 1, the valve core 2 is in an open state. Figure 3 and Figure 4 As shown, when the valve core 2 rotates until the air guide hole 21 is isolated from the air guide pipe 1, the valve core 2 is in a closed state.

[0048] In a specific embodiment, the piston component can also be pulled out from the cavity 4. In this embodiment, one end of the cavity 4 is open, and the piston component is inserted into the cavity 4 through the opening of the cavity 4, and the piston component is pulled out from the cavity 4 through the opening of the cavity 4.

[0049] By pulling the piston component out of the cavity 4 , the crude MMP product can be added into the cavity 4 , and the crude MMP product from which hydrogen sulfide has been discharged can be taken out of the cavity 4 .

[0050] In a specific embodiment, Figures 3 to 6 As shown, a knob 22 is provided on the valve core 2 , and the knob 22 provides convenience for an operator to rotate the valve core 2 .

[0051] In actual operation, when the piston component is separated from the cavity 4, add the MMP crude product A into the cavity 4, turn the knob 22, rotate the valve core 2 until the air guide hole 21 is connected with the air guide tube 1, insert the piston component into the cavity 4, push the piston component downward, and move it downward along the inner wall of the cavity 4 to above the liquid level of the MMP crude product A, so as to discharge the excess air in the liquid storage cavity;

[0052] Next, the valve core 2 is rotated until the air guide hole 21 is isolated from the air guide tube 1, and the piston component is pulled upward to move upward along the inner wall of the cavity 4 to the top of the cavity 4, so that negative pressure is formed in the liquid storage cavity, promoting the release of hydrogen sulfide in the MMP crude product 5;

[0053] Then, the valve core 2 is rotated again until the air guide hole 21 is connected to the air guide pipe 1, and the piston component is pushed downward to move downward along the inner wall of the cavity 4 to above the liquid level of the MMP crude product A, so as to discharge the hydrogen sulfide released from the liquid storage cavity;

[0054] The above operation is repeated twice, and then the piston component is separated from the chamber 4 again, and the treated MMP crude product A is transferred to the gas phase test sample bottle;

[0055] When the treated MMP crude product A is detected by gas chromatography, the gas injector can successfully absorb the MMP crude product A, and no escaped hydrogen sulfide gas can be detected in the experimental environment.

[0056] In a specific embodiment, Figure 2 and Figure 7As shown, both ends of the sealing ring 3 are provided with limiting parts 6, and the piston plate 5 is located between the limiting parts 6 at both ends of the sealing ring 3 to prevent the piston plate 5 and the sealing ring 3 from separating during the sliding process;

[0057] In this embodiment, the sealing ring 3 and the limiting portion 6 are formed in one piece, and the sealing ring 3 and the limiting portion 6 can wrap the piston plate 5 .

[0058] In a specific embodiment, Figure 1 and Figure 2 As shown, the bottom of the cavity 4 is hemispherical, and the cross-sectional area of ​​the hemispherical bottom is smaller than that of other positions of the cavity 4, which can play a limiting role and prevent the piston assembly from squeezing the MMP crude product A, thereby preventing the MMP crude product A from rushing out of the air duct 1.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A sample processor, characterized in that: It comprises an air guide tube (1), a valve core (2) and a cavity (4); one end of the air guide tube (1) is connected to the atmosphere, and the other end of the air guide tube (1) is provided with a piston component; The piston component can be inserted into the cavity (4) to form a liquid storage cavity with the cavity (4), and the liquid storage cavity can accommodate the crude MMP product (A). The piston component inserted into the cavity (4) can slide along the inner wall of the cavity (4) to change the volume of the liquid storage cavity; The valve core (2) is mounted on the air guide tube (1); when the valve core (2) is in an open state, the liquid storage chamber is connected to the atmosphere through the air guide tube (1); when the valve core (2) is in a closed state, the liquid storage chamber is isolated from the atmosphere.

2. A sample processor according to claim 1, characterized in that: The piston component comprises a piston plate (5) and a sealing ring (3); the piston plate (5) is fixed on the outer periphery of the air guide tube (1); the sealing ring (3) is sleeved on the outer periphery of the piston plate (5); and the outer periphery of the sealing ring (3) can abut against the inner wall of the cavity (4).

3. A sample processor according to claim 1, characterized in that: The air guide pipe (1) is provided with a valve core mounting portion (11), the valve core (2) is arranged on the valve core mounting portion (11), the valve core (2) is rotatable relative to the valve core mounting portion (11), and the valve core (2) is provided with an air guide hole (21); When the valve core (2) rotates until the air guide hole (21) is connected to the air guide tube (1), the valve core (2) is in an open state; when the valve core (2) rotates until the air guide hole (21) is isolated from the air guide tube (1), the valve core (2) is in a closed state.

4. A sample processor according to claim 1, characterized in that: The piston component can also be pulled out from the cavity (4).

5. A sample processor according to claim 3, characterized in that: The valve core (2) is provided with a knob (22).

6. A sample processor according to claim 2, characterized in that: Both ends of the sealing ring (3) are provided with limiting portions (6), and the piston plate (5) is located between the limiting portions (6) at the two ends of the sealing ring (3).

7. A sample processor according to claim 1, characterized in that: The bottom of the cavity (4) is hemispherical.

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