Non-methane total hydrocarbon automatic sample injector

Abstract

The utility model relates to the technical field of sample injectors, and discloses a non-methane total hydrocarbon automatic sample injector which comprises a support, the upper surface of the support is fixedly connected with a sample injection box, a first sample injection groove is formed in the sample injection box, a second sample injection groove is formed in the sample injection box, a pneumatic three-way valve is arranged in the sample injection box, and the pneumatic three-way valve is connected with the first sample injection groove and the second sample injection groove. And the interior of the pneumatic three-way valve is fixedly connected with two connecting bent pipes. According to the non-methane total hydrocarbon automatic sample injector, the output shaft drives the threaded pipe to move in the rotating process, the push plate is promoted to move, then the pushing operation of an air bag or a needle tube is completed, and the effects that automatic sample injection of gas can be achieved, gas waste is avoided, manpower is liberated, the operation efficiency is improved, and the cost is saved are achieved; the problems that manual non-methane hydrocarbon determination operation is labor-consuming, the workload of workers is increased, the operation efficiency is reduced, and the operation cost is increased are solved.

Description

Technical Field

[0001] The present application relates to the technical field of sample injectors, and in particular to an automatic sample injector for non-methane total hydrocarbons. Background Art

[0002] The injector is a device in the chromatography system that can quantitatively deliver the analytical sample into the chromatographic column.

[0003] During the non-methane total hydrocarbon determination operation, workers are required to manually squeeze the air bag or syringe for sampling, which is highly dependent on manpower, increases the workload of workers, reduces work efficiency, and increases work costs. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present application provides an automatic sampler for non-methane total hydrocarbons, which has the advantages of being able to realize automatic sampling, facilitating sampling operation, avoiding gas waste, freeing up manpower, improving operating efficiency, and saving costs. It solves the problem that during the non-methane total hydrocarbon measurement operation, workers need to manually squeeze air bags or syringes for sampling, which relies heavily on manpower, increases the workload of workers, reduces operating efficiency, and increases operating costs.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a non-methane total hydrocarbon automatic injector, comprising a bracket, the upper surface of the bracket is fixedly connected to an injection box, a first injection slot is provided inside the injection box, a second injection slot is provided inside the injection box, a pneumatic three-way valve is provided inside the injection box, two connecting elbows are fixedly connected inside the pneumatic three-way valve, the other ends of the connecting elbows are respectively connected to the first injection slot and the second injection slot, a heating device is provided inside the injection box, heating plates are fixedly connected on both sides of the heating device, the heating plates are respectively located inside the first injection slot and the second injection slot, a propulsion box is slidably connected to the front side of the injection box, two motors are provided inside the propulsion box, each of the motors is rotatably connected to an output shaft, the outer circumferential surface of the output shaft is threadedly connected to a threaded pipe, and the back side of the threaded pipe is fixedly connected to a push plate.

[0006] Through the above scheme, during the non-methane total hydrocarbon determination operation, the staff needs to manually squeeze the air bag or syringe for sampling, which relies heavily on manpower, increases the workload of the workers, reduces work efficiency, and increases work costs. The output shaft drives the threaded tube to move during the rotation process, prompting the push plate to move, and then completes the pushing operation of the air bag or syringe, realizing automatic sampling, avoiding gas waste, liberating manpower, improving work efficiency, and saving costs.

[0007] Furthermore, a connector is provided inside the first sample inlet groove, the back side of the connector is fixedly connected to one of the connecting elbows, and a sleeve is fixedly connected to the inner wall of the second sample inlet groove.

[0008] Through the above scheme, the air bag can be put on the connector and the sleeve joint can be sealed, which is convenient for installing the air bag. The syringe can be inserted into the sleeve and the needle can be inserted into the connecting elbow, which is convenient for installing the syringe.

[0009] Furthermore, the first sample injection slot and the second sample injection slot are both fixedly connected to a protective shell, and each of the protective shells is provided with through holes arranged at equal intervals.

[0010] Through the above solution, the protective shell can protect the staff to avoid burns caused by accidentally touching the heating plate during the process of taking and placing the air bag or syringe, and the through hole can meet the heat flow.

[0011] Furthermore, two limit plates are fixedly connected to the outer circumferential surface of the threaded tube, and the outer surface of each limit plate is slidably connected to the interior of the propulsion box.

[0012] Through the above scheme, the threaded tube is restricted to prevent the threaded tube from rotating with the output shaft, so that the threaded tube always drives the push plate to move horizontally.

[0013] Furthermore, an electric telescopic rod is fixedly connected to the upper surface of the bracket, and the upper surface of the electric telescopic rod is fixedly connected to the bottom surface of the propulsion box. Limiting blocks are fixedly connected to both sides of the sample injection box, and the outer surface of each of the limiting blocks is slidably connected to the propulsion box through an empty groove opened inside the propulsion box.

[0014] Through the above scheme, the electric telescopic rod can drive the push box to rise and fall, providing convenience for the detection operation, and the limit block can limit the push box to prevent the push box from easily slipping off the sample box.

[0015] Furthermore, two columns are fixedly connected to the upper surface of the bracket, and the outer circumferential surface of each column is slidably connected to the inside of the propulsion box.

[0016] Through the above scheme, the propulsion box is always lifted and lowered longitudinally, thereby increasing the stability of the propulsion box movement.

[0017] Furthermore, a temperature control knob is provided on the upper surface of the sample feeding box, and a temperature detector is provided on the upper surface of the sample feeding box.

[0018] Through the above scheme, the temperature detector can detect the temperature in the first injection slot and the second injection slot and intuitively display the detected temperature. The temperature control knob can control the heating device and adjust the heating temperature.

[0019] Furthermore, a connecting pipe is fixedly connected to the back of the pneumatic three-way valve, an air intake detector is fixedly sleeved on the outer circumferential surface of the connecting pipe, an air intake display is provided on the front of the propulsion box, a three-way valve knob is provided on the front of the propulsion box, a first push button is provided on the front of the propulsion box, and a second push button is provided on the front of the propulsion box.

[0020] Through the above scheme, the air intake detector can detect the air intake volume and display the air intake volume through the air intake display, which is convenient for the staff to obtain the air intake status. The three-way valve knob can control the pneumatic three-way valve to control the circulation and opening and closing of the pneumatic three-way valve. The first push button can control the motor corresponding to the first injection slot, and the second push button can control the motor corresponding to the second injection slot, which is convenient for the injection operation.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] The non-methane total hydrocarbon automatic sampler drives the threaded tube to move during the rotation of the output shaft, prompting the push plate to move, and then completes the pushing operation of the air bag or the needle tube, thereby achieving the effect of being able to automatically sample the gas, avoid gas waste, liberate manpower, improve work efficiency, and save costs, and solves the problem that manual non-methane total hydrocarbon measurement operations are relatively laborious, increase the workload of workers, reduce work efficiency, and increase work costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall three-dimensional structure diagram of this application;

[0024] Figure 2 This is the structural diagram of the sample injection box for this application;

[0025] Figure 3 The structural diagram of the propulsion box for this application;

[0026] Figure 4 This is a partial cross-sectional structural diagram of this application;

[0027] Figure 5 This is the structural diagram of the pneumatic three-way valve for this application.

[0028] In the figure:

[0029] 1. Bracket; 2. Sample injection box; 3. First sample injection slot; 4. Second sample injection slot; 5. Pneumatic three-way valve; 6. Connecting elbow; 7. Connecting head; 8. Sleeve; 9. Heating device; 10. Heating plate; 11. Protective shell; 12. Push box; 13. Motor; 14. Output shaft; 15. Threaded pipe; 16. Push plate; 17. Limit plate; 18. Electric telescopic rod; 19. Limit block; 20. Column; 21. Temperature control knob; 22. Temperature detector; 23. Connecting pipe; 24. Air intake detector; 25. Air intake display; 26. First push button; 27. Second push button; 28. Three-way valve knob. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] See also Figure 1 , Figure 4 and Figure 5 In the present embodiment, a non-methane total hydrocarbon automatic injector comprises a bracket 1, an injection box 2 is fixedly connected to the upper surface of the bracket 1, a first injection slot 3 is provided inside the injection box 2, a second injection slot 4 is provided inside the injection box 2, a pneumatic three-way valve 5 is provided inside the injection box 2, two connecting elbows 6 are fixedly connected inside the pneumatic three-way valve 5, the other ends of the connecting elbows 6 are respectively connected to the first injection slot 3 and the second injection slot 4, a heating device 9 is provided inside the injection box 2, heating plates 10 are fixedly connected to both sides of the heating device 9, and the heating plates 10 are respectively located inside the first injection slot 3 and the second injection slot 4, a propulsion box 12 is slidably connected to the front of the injection box 2, two motors 13 are provided inside the propulsion box 12, an output shaft 14 is rotatably connected inside each motor 13, a threaded tube 15 is threadedly connected to the outer circumferential surface of the output shaft 14, and a push plate 16 is fixedly connected to the back of the threaded tube 15.

[0032] See also Figure 5 A connector 7 is provided inside the first injection slot 3, and the back of the connector 7 is fixedly connected to one of the connecting elbows 6. A sleeve 8 is fixedly connected to the inner wall of the second injection slot 4. The air bag can be put on the connector 7, and the sleeve joint can be sealed to facilitate the installation of the air bag. The syringe can be inserted into the sleeve 8, and the needle can be inserted into the connecting elbow 6 to facilitate the installation of the syringe.

[0033] See also Figure 2 , Figure 4 and Figure 5The first injection slot 3 and the second injection slot 4 are both fixedly connected with a protective shell 11, and each protective shell 11 is provided with through holes arranged at equal intervals. The protective shell 11 can protect the staff to avoid burns caused by accidentally touching the heating plate 10 during the process of taking and placing the air bag or syringe, and the through holes can meet the heat circulation.

[0034] See also Figure 4 Two limit plates 17 are fixedly connected to the outer circumferential surface of the threaded tube 15. The outer surface of each limit plate 17 is slidably connected to the inside of the propulsion box 12 to limit the threaded tube 15, prevent the threaded tube 15 from rotating with the output shaft 14, and enable the threaded tube 15 to always drive the push plate 16 to move horizontally.

[0035] See also Figure 1 , Figure 2 and Figure 3 An electric telescopic rod 18 is fixedly connected to the upper surface of the bracket 1, and the upper surface of the electric telescopic rod 18 is fixedly connected to the bottom surface of the propulsion box 12. Limit blocks 19 are fixedly connected to both sides of the sample injection box 2. The outer surface of each limit block 19 is slidably connected to the propulsion box 12 through an empty groove opened inside the propulsion box 12. The electric telescopic rod 18 can drive the propulsion box 12 to rise and fall, providing convenience for the detection operation. The limit block 19 can limit the propulsion box 12 to prevent the propulsion box 12 from easily slipping off the sample injection box 2.

[0036] See also Figure 1 Two columns 20 are fixedly connected to the upper surface of the bracket 1, and the outer circumferential surface of each column 20 is slidably connected to the inside of the propulsion box 12, so that the propulsion box 12 is always lifted and lowered longitudinally, thereby increasing the stability of the movement of the propulsion box 12.

[0037] See also Figure 1 and Figure 2 A temperature control knob 21 is provided on the upper surface of the sample injection box 2, and a temperature detector 22 is provided on the upper surface of the sample injection box 2. The temperature detector 22 can detect the temperature in the first sample injection slot 3 and the second sample injection slot 4, and display the detected temperature intuitively. The temperature control knob 21 can control the heating device 9 and adjust the heating temperature.

[0038] See also Figure 1 , Figure 4 and Figure 5A connecting pipe 23 is fixedly connected to the back of the pneumatic three-way valve 5, and an air intake detector 24 is fixedly sleeved on the outer circumferential surface of the connecting pipe 23. An air intake display 25 is provided on the front of the propulsion box 12, and a three-way valve knob 28 is provided on the front of the propulsion box 12. A first push button 26 is provided on the front of the propulsion box 12, and a second push button 27 is provided on the front of the propulsion box 12. The air intake detector 24 can detect the air intake and display the air intake through the air intake display 25, which is convenient for the staff to obtain the air intake status. The three-way valve knob 28 can control the pneumatic three-way valve 5 to control the circulation and opening and closing of the pneumatic three-way valve 5. The first push button 26 can control the motor 13 corresponding to the first injection slot 3, and the second push button 27 can control the motor 13 corresponding to the second injection slot 4, which is convenient for the injection operation.

[0039] In the present embodiment, an automatic non-methane total hydrocarbon sampler drives the threaded tube 15 to move during the rotation of the output shaft 14, prompting the push plate 16 to move, thereby completing the pushing operation of the air bag or the needle tube, achieving the effect of being able to realize automatic gas sampling, avoid gas waste, liberate manpower, improve work efficiency, and save costs, and solves the problem that manual non-methane total hydrocarbon measurement operations are more laborious, increase the workload of workers, reduce work efficiency, and increase work costs.

[0040] It should be noted that a time control knob and a push volume control knob are respectively provided below the first push button 26 and the second push button 27. The time control knob and the push volume control knob are connected to the air intake detector 24. The air intake detector 24 can control the motor 13 and can be actively set to push a fixed amount of gas at regular intervals, so as to free up manpower and enable independent machine experiments.

[0041] The working principle of the above embodiment is:

[0042] The connecting pipe 23 is connected to an external gas chromatograph. When sampling and testing of non-methane total hydrocarbons is required, the electric telescopic rod 18 can be started to drive the push box 12 to move downward. If the gas container is an air bag, the air bag can be placed in the first injection slot 3, the air bag can be put on the connector 7, and the sleeve joint can be sealed. Then the push box 12 can be moved upward, and the temperature control knob 21 can be rotated to start the heating device 9 to heat the first injection slot 3 through the heating plate 10, and the temperature is adjusted to 120°C±5°C. The temperature detector 22 can detect the temperature and display the detected temperature intuitively. When the temperature is in the range of 120°C±5°C, the three-way valve knob 28 is rotated to cause the pneumatic three-way valve 5 to circulate with the first injection slot 3, and the first push button 26 is pressed to start The motor 13 corresponding to the first injection slot 3 drives the output shaft 14 to rotate, and the output shaft 14 drives the push plate 16 forward through the threaded tube 15 to squeeze the air bag, and then the injection operation is completed. If the gas container is a syringe, the syringe can be inserted into the sleeve 8, and the needle is inserted into the connecting elbow 6. Then, the heating device 9 is controlled by the temperature control knob 21 to heat the second injection slot 4 through the heating plate 10. When the temperature is heated to 120°C±5°C, the three-way valve knob 28 is rotated to cause the pneumatic three-way valve 5 to flow with the second injection slot 4. The second push button 27 is pressed to start the motor 13 corresponding to the second injection slot 4 to drive the output shaft 14 to rotate, and the output shaft 14 drives the push plate 16 forward through the threaded tube 15 to squeeze the syringe, and then the injection operation is completed.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A non-methane total hydrocarbon automatic sample injector, comprising a bracket (1), characterized in that: The upper surface of the support (1) is fixedly connected to a sample injection box (2), a first sample injection slot (3) is provided inside the sample injection box (2), a second sample injection slot (4) is provided inside the sample injection box (2), a pneumatic three-way valve (5) is provided inside the sample injection box (2), two connecting elbows (6) are fixedly connected inside the pneumatic three-way valve (5), the other ends of the connecting elbows (6) are respectively connected to the first sample injection slot (3) and the second sample injection slot (4), a heating device (9) is provided inside the sample injection box (2), and the heating device (9) is provided inside the sample injection box (2). Both sides of the device (9) are fixedly connected with heating plates (10), and the heating plates (10) are respectively located inside the first sample injection slot (3) and the second sample injection slot (4). The front side of the sample injection box (2) is slidably connected with a propulsion box (12), and two motors (13) are arranged inside the propulsion box (12). Each of the motors (13) is rotatably connected with an output shaft (14). The outer circumferential surface of the output shaft (14) is threadedly connected with a threaded tube (15), and the back side of the threaded tube (15) is fixedly connected with a push plate (16).

2. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: A connector (7) is provided inside the first sample injection groove (3), the back side of the connector (7) is fixedly connected to one of the connecting elbows (6), and a sleeve (8) is fixedly connected to the inner wall of the second sample injection groove (4).

3. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: The first sample injection slot (3) and the second sample injection slot (4) are both fixedly connected to a protective shell (11), and each protective shell (11) is provided with through holes arranged at equal intervals.

4. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: Two limit plates (17) are fixedly connected to the outer circumferential surface of the threaded tube (15), and the outer surface of each limit plate (17) is slidably connected to the inside of the propulsion box (12).

5. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: The upper surface of the bracket (1) is fixedly connected to an electric telescopic rod (18), and the upper surface of the electric telescopic rod (18) is fixedly connected to the bottom surface of the propulsion box (12). Both sides of the sample injection box (2) are fixedly connected to limit blocks (19), and the outer surface of each limit block (19) is slidably connected to the propulsion box (12) through a hollow groove opened inside the propulsion box (12).

6. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: Two upright posts (20) are fixedly connected to the upper surface of the bracket (1), and the outer circumferential surface of each upright post (20) is slidably connected to the inside of the propulsion box (12).

7. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: A temperature control knob (21) is provided on the upper surface of the sample feeding box (2), and a temperature detector (22) is provided on the upper surface of the sample feeding box (2).

8. The non-methane total hydrocarbon automatic sample injector according to claim 1, characterized in that: The back of the pneumatic three-way valve (5) is fixedly connected to a connecting pipe (23), the outer circumferential surface of the connecting pipe (23) is fixedly sleeved with an intake volume detector (24), the front of the propulsion box (12) is provided with an intake volume display (25), the front of the propulsion box (12) is provided with a three-way valve knob (28), the front of the propulsion box (12) is provided with a first push button (26), and the front of the propulsion box (12) is provided with a second push button (27).

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