Device for rapidly measuring content of acetylene and hydrogen chloride in crude vinyl chloride

Abstract

The utility model relates to the technical field of content analysis of acetylene and hydrogen chloride in vinyl chloride, and provides a device for rapidly measuring the content of acetylene and hydrogen chloride in crude vinyl chloride, which comprises a gas chromatograph body, a mounting frame is fixedly mounted on one side of the gas chromatograph body, and a rotating component is arranged on the mounting frame. Three connecting plates are sequentially and fixedly mounted on the outer side wall of the rotating assembly in a circular array mode, a pair of elastic telescopic assemblies is arranged on each connecting plate, mounting plates are arranged at the tops of the three pairs of elastic telescopic assemblies, and circular holes are formed in the positions, close to the ends, of the three connecting plates and the three mounting plates; the rotating assembly drives the connecting plate to intermittently rotate by 120 degrees, then the first pressing assembly presses the mounting plate to descend, so that the needle head of the sample injection needle can be inserted into the sample injection opening in the gas chromatograph body, and finally, the second pressing assembly presses downwards, so that continuous needle sample injection can be realized, and rapid and accurate measurement is further realized; meanwhile, the analysis efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of acetylene and hydrogen chloride content analysis technology in vinyl chloride, specifically to an apparatus for rapidly determining the acetylene and hydrogen chloride content in crude vinyl chloride. Background Technology

[0002] For the analysis of acetylene and hydrogen chloride content in crude vinyl chloride in the chlor-alkali industry, most companies still use acid-base neutralization titration to calculate the content. Some companies use gas chromatography for analysis, with gas pipelines made of Hastelloy alloy. The sample is injected through a valve, which can achieve the analysis of hydrogen chloride content.

[0003] Although gas chromatography can analyze hydrogen chloride content, only one sample can be injected at a time via valve injection. Due to the adsorption of hydrogen chloride by the GDX series chromatographic column, the repeatability of the samples is poor, resulting in a large analytical bias. Furthermore, the analysis time via valve injection is too long, with a single sample taking about 6 minutes to analyze, thus failing to improve analytical efficiency. Utility Model Content

[0004] This invention proposes a device for the rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride. It solves the problems of related technologies, such as only one sample can be injected at a time via valve injection, poor sample repeatability and large analytical bias due to the adsorption of hydrogen chloride by the GDX series chromatographic column, and excessively long analysis time via valve injection, with a single sample taking about 6 minutes, thus failing to improve analytical efficiency.

[0005] The technical solution of this utility model is as follows: A device for rapidly determining the content of acetylene and hydrogen chloride in crude vinyl chloride includes a gas chromatograph body, a mounting frame is fixedly installed on one side of the gas chromatograph body, a rotating component is provided on the mounting frame, and three connecting plates are fixedly installed in a circular array on the outer wall of the rotating component.

[0006] Each of the three connecting plates is provided with a pair of elastic telescopic components, and each of the three pairs of elastic telescopic components is provided with a mounting plate on its top. Each of the three connecting plates and the three mounting plates has a round hole near its end, and a sample injection needle is inserted into the inside of the round hole.

[0007] The mounting plate is provided with a clamping assembly, and the injection needle is fixed on the mounting plate by the clamping assembly;

[0008] A mounting bracket is fixedly installed on the top of the gas chromatograph body, and the injection port on the gas chromatograph body is located inside the mounting bracket. A first pressing component and a second pressing component are respectively provided on the mounting bracket.

[0009] Preferably, the clamping assembly includes a rectangular groove formed on the mounting plate, and the rectangular groove is located inside the circular hole;

[0010] The rectangular groove has two clamping plates symmetrically arranged inside. A first T-shaped rod is fixedly installed on one side of each clamping plate, and the first T-shaped rod is inserted into the mounting plate.

[0011] A first spring is provided on the outer wall of the first T-shaped rod, and the first spring is located between the clamping plate and the mounting plate.

[0012] Preferably, the elastic telescopic component includes a sleeve inserted into the connecting plate, a connecting rod provided on the inner side of the sleeve, and the top of the connecting rod being fixedly connected to the mounting plate;

[0013] A second spring is provided on the outer wall of the sleeve and the connecting rod, and the second spring is located between the connecting plate and the mounting plate.

[0014] Preferably, a protective shell is provided inside the circular hole on the connecting plate, and the protective shell is fixedly installed on the connecting plate.

[0015] Preferably, the rotating assembly includes a motor fixedly mounted on the top wall of the mounting frame via a motor bracket, a second T-shaped rod is provided through the top wall of the mounting frame, and the second T-shaped rod is rotatably mounted on the mounting frame, the output end of the motor is fixedly connected to the second T-shaped rod, and the connecting plate is fixedly mounted on the second T-shaped rod.

[0016] Preferably, the first pressing component includes a cylinder fixedly installed on one side of the fixed frame, and a first pressure plate is fixedly installed at the output end of the cylinder.

[0017] Preferably, the second pressing component includes an electric telescopic rod fixedly installed on the top wall of the fixed frame, and a second pressure plate is fixedly installed at the bottom of the electric telescopic rod, with the second pressure plate located above the injection needle.

[0018] The working principle and beneficial effects of this utility model are as follows:

[0019] The rotating assembly drives the connecting plate to rotate intermittently by 120°. Then, the first pressing assembly presses the mounting plate down, allowing the injection needle tip to be inserted into the injection port on the gas chromatograph body. Finally, the second pressing assembly presses down, enabling continuous injection and thus achieving rapid and accurate measurement, while greatly improving the efficiency of analysis. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0022] Figure 2 A schematic diagram of the mounting bracket is provided for this utility model;

[0023] Figure 3 A schematic diagram of the rotating component is provided for this utility model;

[0024] Figure 4 A structural schematic diagram of the elastic telescopic component is provided for this utility model;

[0025] Figure 5 A cross-sectional structural diagram of the mounting plate is provided for this utility model;

[0026] Figure 6 A structural schematic diagram of the fixing frame is provided for this utility model.

[0027] In the diagram: 1. Gas chromatograph body; 2. Mounting bracket;

[0028] 3. Rotating assembly; 31. Motor; 32. Second T-shaped rod;

[0029] 4. Connecting plate;

[0030] 5. Elastic telescopic component; 51. Sleeve; 52. Connecting rod; 53. Second spring;

[0031] 6. Mounting plate;

[0032] 7. Clamping assembly; 71. Rectangular groove; 72. Clamping plate; 73. First T-shaped rod;

[0033] 8. Fixture;

[0034] 9. First pressing assembly; 91. Cylinder; 92. First pressure plate;

[0035] 10. Second pressing assembly; 101. Electric telescopic rod; 102. Second pressure plate;

[0036] 11. Protective casing. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] Example 1

[0040] Please see Figure 1 - Figure 6 An apparatus for rapidly determining the content of acetylene and hydrogen chloride in crude vinyl chloride includes a gas chromatograph body 1, a mounting frame 2 fixedly installed on one side of the gas chromatograph body 1, a rotating component 3 provided on the mounting frame 2, and three connecting plates 4 fixedly installed in a circular array on the outer side wall of the rotating component 3.

[0041] Each of the three connecting plates 4 is provided with a pair of elastic telescopic components 5, and each of the three pairs of elastic telescopic components 5 is provided with a mounting plate 6 on its top. Each of the three connecting plates 4 and the three mounting plates 6 has a round hole near its end, and a sample injection needle is inserted into the inside of the round hole.

[0042] A mounting bracket 8 is fixedly installed on the top of the gas chromatograph body 1, and the injection port on the gas chromatograph body 1 is located inside the mounting bracket 8. A first pressing component 9 and a second pressing component 10 are respectively provided on the mounting bracket 8.

[0043] This invention provides a device for rapidly determining the acetylene and hydrogen chloride content in crude vinyl chloride. In use, the chromatographic parameters and injection method are first adjusted, setting the injection method to needle injection. Then, the injection needle is manually inserted into the circular hole on the mounting plate 6 and connecting plate 4. Next, the first pressing component 9 presses down on the mounting plate 6 on the elastic telescopic component 5, allowing the injection needle tip to be inserted into the injection port on the gas chromatograph body 1. Then, the second pressing component 10 extends downward and presses down on the piston rod on the injection needle, thus achieving needle injection. After the first injection is completed, the first pressing component 9 and the second pressing component 10 are reset. Then, the elastic telescopic component 5, which is compressed, pushes the mounting plate 6 upward, thereby pulling the injection needle out of the injection port. Then, the rotating component 3 drives the connecting plate 4 to rotate 120°. The above steps are repeated so that the second and third injection samples can enter the gas chromatograph body 1, thereby realizing continuous injection with good repeatability, error within the normal deviation range, and good analytical effect. This enables rapid and accurate measurement and greatly improves the efficiency of analysis.

[0044] Furthermore, the elastic telescopic component 5 includes a sleeve 51 inserted into the connecting plate 4, a connecting rod 52 is provided on the inner side of the sleeve 51, and the top of the connecting rod 52 is fixedly connected to the mounting plate 6.

[0045] A second spring 53 is provided on the outer wall of the sleeve 51 and the connecting rod 52, and the second spring 53 is located between the connecting plate 4 and the mounting plate 6.

[0046] Specifically, through the sleeve 51 and the connecting rod 52, when the first pressing component 9 presses the mounting plate 6 down, the mounting plate 6 can only move in a straight line and cannot tilt. Then, under the action of the second spring 53, when the first pressing component 9 leaves the mounting plate 6, the mounting plate 6 can rise and drive the injection needle away from the injection port on the gas chromatograph body 1.

[0047] Furthermore, the rotating assembly 3 includes a motor 31 fixedly mounted on the inner top wall of the mounting frame 2 via a motor frame. A second T-shaped rod 32 is provided through the top wall of the mounting frame 2, and the second T-shaped rod 32 is rotatably mounted on the mounting frame 2. The output end of the motor 31 is fixedly connected to the second T-shaped rod 32, and the connecting plate 4 is fixedly mounted on the second T-shaped rod 32.

[0048] Specifically, the motor 31 drives the second T-shaped rod 32 to rotate intermittently by 120°, thereby enabling the three connecting plates 4 and the mounting plate 6 to drive the injection needles to pass through the fixing frame 8 one after another, thus realizing continuous injection and achieving rapid determination of hydrogen chloride content, while greatly improving the efficiency of analysis.

[0049] Furthermore, the first pressing component 9 includes a cylinder 91 fixedly installed on one side of the fixed frame 8, and a first pressure plate 92 is fixedly installed at the output end of the cylinder 91.

[0050] Specifically, the cylinder 91 drives the first pressure plate 92 to descend, thereby enabling the first pressure plate 92 to press the mounting plate 6, which in turn allows the injection needle on it to be inserted into the injection port on the gas chromatograph body 1.

[0051] Furthermore, the second pressing assembly 10 includes an electric telescopic rod 101 fixedly installed on the inner top wall of the fixed frame 8, and a second pressure plate 102 is fixedly installed at the bottom of the electric telescopic rod 101, and the second pressure plate 102 is located above the injection needle.

[0052] Specifically, the electric telescopic rod 101 drives the second pressure plate 102 to descend, thereby enabling the second pressure plate 102 to press the piston rod on the injection needle, thus realizing the injection of the needle.

[0053] Example 2

[0054] Based on Embodiment 1, in this embodiment: a clamping assembly 7 is provided on the mounting plate 6, and the injection needle is fixed on the mounting plate 6 through the clamping assembly 7. The clamping assembly 7 includes a rectangular groove 71 opened on the mounting plate 6, and the rectangular groove 71 is located inside the circular hole. Two clamping plates 72 are symmetrically arranged inside the rectangular groove 71. A first T-shaped rod 73 is fixedly installed on one side of each of the two clamping plates 72, and the first T-shaped rod 73 is inserted into the mounting plate 6. A first spring is provided on the outer wall of the first T-shaped rod 73, and the first spring is located between the clamping plate 72 and the mounting plate 6.

[0055] The technical solution provided in this embodiment is as follows: the clamping plate 72 is pushed by the elastic force of the first spring itself, so that the two clamping plates 72 can move stably and lock into each other under the action of the first T-shaped rod 73 and the mounting plate 6, thereby clamping the injection needle inserted in the round hole, thereby improving the stability of the injection needle during movement and injection.

[0056] Example 3

[0057] Based on Embodiment 1, in this embodiment: a protective shell 11 is provided in the circular hole on the connecting plate 4, and the protective shell 11 is fixedly installed on the connecting plate 4.

[0058] The technical solution provided in this embodiment is as follows: the protective shell 11 can not only improve the stability of the injection needle during injection, but also provide a physical barrier to a certain extent to prevent some large particulate contaminants from directly contacting the needle surface.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride, comprising a gas chromatograph body (1), characterized in that, One side of the gas chromatograph body (1) is fixedly installed with a mounting rack (2), a rotating assembly (3) is arranged on the mounting rack (2), and three connecting plates (4) are sequentially and fixedly installed on the outer side wall of the rotating assembly (3) in a circular array. A pair of elastic telescopic assemblies (5) are arranged on each of the three connecting plates (4), and the top of each of the three pairs of elastic telescopic assemblies (5) is provided with a mounting plate (6). Circular holes are formed in the positions close to the end portions of the three connecting plates (4) and the three mounting plates (6), and a sample injection needle is inserted into the circular holes. A clamping assembly (7) is arranged on the mounting plate (6), and the sample injection needle is fixed to the mounting plate (6) through the clamping assembly (7). A fixing frame (8) is fixedly installed on the top of the gas chromatograph body (1), and a sample inlet on the gas chromatograph body (1) is located on the inner side of the fixing frame (8). A first pressing assembly (9) and a second pressing assembly (10) are respectively arranged on the fixing frame (8).

2. The device for rapidly determining the content of acetylene and hydrogen chloride in crude vinyl chloride according to claim 1, characterized in that: The clamping assembly (7) comprises a rectangular groove (71) formed in the mounting plate (6), and the rectangular groove (71) is located on the inner side of the circular hole. Two clamping plates (72) are symmetrically arranged in the rectangular groove (71), a first T-shaped rod (73) is fixedly installed on one side of each of the two clamping plates (72), and the first T-shaped rod (73) is inserted into the mounting plate (6).

3. The device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride according to claim 2, characterized in that: A first spring is arranged on the outer side wall of the first T-shaped rod (73), and the first spring is located between the clamping plate (72) and the mounting plate (6).

4. The device for rapidly determining the content of acetylene and hydrogen chloride in crude vinyl chloride according to claim 1, characterized in that: The elastic telescopic assembly (5) comprises a sleeve (51) inserted into the connecting plate (4), a connecting rod (52) is arranged on the inner side of the sleeve (51), and the connecting rod (52) is fixedly connected between the top of the mounting plate (6). A second spring (53) is arranged on the outer side wall of the sleeve (51) and the connecting rod (52), and the second spring (53) is located between the connecting plate (4) and the mounting plate (6).

5. The device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride according to claim 1, characterized in that: A protective shell (11) is arranged in the circular hole of the connecting plate (4), and the protective shell (11) is fixedly installed on the connecting plate (4).

6. The device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride according to claim 1, characterized in that: The rotating assembly (3) comprises a motor (31) fixedly installed on the inner top wall of the mounting rack (2) through a motor bracket, a second T-shaped rod (32) is throughly arranged on the top wall of the mounting rack (2), and the second T-shaped rod (32) is rotatably installed on the mounting rack (2).

7. A device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride according to claim 6, characterized in that: The output end of the motor (31) is fixedly connected with the second T-shaped rod (32), and the connecting plate (4) is fixedly installed on the second T-shaped rod (32).

8. The device for rapidly determining the content of acetylene and hydrogen chloride in crude vinyl chloride according to claim 1, characterized in that: The first pressing assembly (9) comprises a gas cylinder (91) fixedly installed on one side of the fixing frame (8), and a first pressing plate (92) is fixedly installed on the output end of the gas cylinder (91).

9. The device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride according to claim 1, characterized in that: The second pressing assembly (10) comprises an electric telescopic rod (101) fixedly installed on the inner top wall of the fixing frame (8).

10. The device for rapid determination of acetylene and hydrogen chloride content in crude vinyl chloride according to claim 9, characterized in that: The bottom of the electric telescopic rod (101) is fixedly provided with a second pressing plate (102), and the second pressing plate (102) is located above the sample injection needle.

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