阅读说明：本技术 一种冷肼 (Cold hydrazine ) 是由 牛艳东 李贺楠 于 2020-11-04 设计创作，主要内容包括：本发明提供一种冷肼,包括：本体、冷却室、设备室和显示控制面板；显示控制面板设置在本体的表面；冷却室和设备室设置在本体内；在本体上端设置有载样气体入口、液氮入口和载样气体出口；在冷却室内设置有盘管；在设备室设置有真空泵、气动阀和脱水装置；盘管一端与载样气体入口连通,另一端与气动阀连通；气动阀分别与真空泵与脱水装置连接；脱水装置与载样气体出口连接；液氮入口与冷却室连通；盘管为迂回型。本发明的冷肼,迂回型设置的盘管,延长了载样气体在冷却室的时间,从而提高了冷凝效果,进而保证色谱分析最后数据的准确性。(The invention provides a cold hydrazine, which comprises: the cooling device comprises a body, a cooling chamber, an equipment chamber and a display control panel; the display control panel is arranged on the surface of the body; the cooling chamber and the equipment chamber are arranged in the body; the upper end of the body is provided with a sample-carrying gas inlet, a liquid nitrogen inlet and a sample-carrying gas outlet; a coil pipe is arranged in the cooling chamber; the equipment chamber is provided with a vacuum pump, a pneumatic valve and a dehydration device; one end of the coil is communicated with a sample-carrying gas inlet, and the other end of the coil is communicated with a pneumatic valve; the pneumatic valve is respectively connected with the vacuum pump and the dehydration device; the dehydration device is connected with the sample-carrying gas outlet; the liquid nitrogen inlet is communicated with the cooling chamber; the coil is circuitous. The cold trap provided by the invention has the advantages that the time of the sample-carrying gas in the cooling chamber is prolonged by the winding pipe, so that the condensation effect is improved, and the accuracy of the final data of chromatographic analysis is further ensured.)

1. A cold trap, comprising: the cooling device comprises a body (1), a cooling chamber (2), an equipment chamber (3) and a display control panel (4); the display control panel (4) is arranged on the surface of the body (1); the cooling chamber (2) and the equipment chamber (3) are arranged in the body (1); a sample-carrying gas inlet (5), a liquid nitrogen inlet (7) and a sample-carrying gas outlet (6) are arranged at the upper end of the body (1); a coil (8) is arranged in the cooling chamber (2); the equipment chamber (3) is provided with a vacuum pump (10), a pneumatic valve (9) and a dehydration device (11); one end of the coil pipe (8) is communicated with the sample-carrying gas inlet (5), and the other end of the coil pipe is communicated with the pneumatic valve (9); the pneumatic valve (9) is respectively connected with the vacuum pump (10) and the dehydration device (11); the dehydration device (11) is connected with the sample-carrying gas outlet (6); the liquid nitrogen inlet (7) is communicated with the cooling chamber (2); the coil (8) is of a circuitous type.

2. A cold trap according to claim 1, characterized by further comprising a liquid level sensor (21) arranged in the cooling chamber (2) and electrically connected to the display control panel (4).

3. A cold trap according to claim 1, further comprising a first temperature sensor (22) arranged in said cooling chamber (2) and electrically connected to said display control panel (4).

4. A cold trap according to claim 1, characterized in that a partition (12) is arranged between the cooling chamber (2) and the equipment chamber (3), a VCR through plate connection (13) being arranged on the partition (12); one end of the VCR plate penetrating joint (13) is connected with the coil pipe (8), and the other end of the VCR plate penetrating joint is connected with the pneumatic valve (9).

5. A cold trap as claimed in claim 4, further comprising: a telescopic mechanism (14) provided in the equipment room (3);

one end of the telescopic mechanism (14) is fixedly connected with the partition plate (12), and the other end of the telescopic mechanism is fixedly connected with the inner wall of the equipment room (3);

the size of the space of the cooling chamber (2) is adjusted by the partition plate (12) under the action of the telescopic mechanism (14), and a sealing ring is arranged on the side surface of the partition plate (12).

6. A cold trap according to claim 1, characterized in that the coil (8) comprises: a plurality of main pipes (15) and a plurality of telescopic pipes (16) which are arranged in parallel;

the main pipe body (15) and the telescopic pipe body (16) are alternately connected in series to form a circuitous pipeline; the telescopic pipe body (16) positioned at the tail end of the circuitous pipeline is connected with a VCR plate-penetrating joint (13);

the telescopic tube body (16) comprises: a first pipe (161) and a second pipe (162);

the first pipe body (161) is sleeved in the second pipe body (162), and a plurality of annular grooves are formed in the inner wall of the second pipe body (162); a sealing ring is arranged in the annular groove; two bulges are symmetrically arranged on the outer side of the first pipe body (161), and a guide groove for accommodating the bulges is arranged on the inner wall of the second pipe body (162); the guide groove is parallel to the central axis of the second pipe body (162);

the primary tube (15) comprises: a plurality of buffers (151) and a plurality of vias (152);

the buffer bodies (151) are communicated with each other through at least one communicating body (152); two ends of the telescopic pipe body (16) are respectively communicated with the two main pipe bodies (15) and the communication position is positioned on one side of the cache body (151).

7. A cold trap according to claim 6, characterized in that the coil (8) further comprises: the device comprises a plurality of unloading bodies (19), wherein the unloading bodies (19) are connected below a buffer body (151) at the lowest part of the main pipe body (15) in a one-to-one correspondence manner;

the discharge body (19) comprises:

the unloading channel (191) is communicated with the cache body (151);

two first baffles (193) and second baffles (192) arranged in parallel, the first baffles (193) and the second baffles (192) both being arranged at an angle to the central axis of the discharge chute (191); one end of the first baffle (193) is fixedly connected with the inner wall of the discharging channel (191), and a first gap is formed between the other end of the first baffle and the inner wall of the discharging channel (191); one end of the second baffle (192), which is close to the first gap, is fixedly connected with the inner wall of the discharging channel (191), and a second gap is formed between the other end of the second baffle and the inner wall of the discharging channel (191).

8. A cold trap according to claim 6, characterized in that the coil (8) further comprises: at least one fixing column (17) arranged between the main pipe body (15) far away from the partition plate (12) and the inner wall of the cooling chamber (2); one end of the fixed column (17) is fixedly connected with the cache body (151) of the main pipe body (15), and the other end of the fixed column is fixedly connected with the inner wall of the cooling chamber (2);

at least one spacing body (18) arranged between one main tube (15) and the other main tube (15) of the coil (8) and/or between the main tube (15) of the coil (8) close to the partition (12) and the partition (12);

the spacing body (18) comprises: an inner core (181) and a shell (182); the inner core (181) is sleeved in the shell (182), a long-strip-shaped through hole (183) is formed in the side face of the shell (182), and a cylinder (184) is fixedly arranged on the side face of one end, located in the shell (182), of the inner core (181); the cylinder (184) is arranged in the elongated through hole (183) in a sliding manner.

9. A cold trap as claimed in any one of claims 1 to 8, further comprising:

the electronic control pressure relief valves (28) are communicated with the material unloading body (19) in a one-to-one correspondence mode through pipelines, and the electronic control pressure relief valves (28) are electrically connected with the display control panel (4);

the pressure sensors (23) are correspondingly arranged on the pipelines of the electronic control pressure relief valve (28) and the material unloading body (19) one by one and are used for detecting the pressure of the pipelines of the electronic control pressure relief valve (28) and the material unloading body (19); the pressure sensor (23) is electrically connected with the display control panel (4); the display control panel (4) detects a pressure value in the pipeline through the pressure sensor (23), and when the pressure value is larger than a preset first pressure value, the corresponding electronic control pressure release valve (28) is controlled to be opened;

the first gas flow sensor (24) is arranged at the sample carrying gas inlet (5), is used for detecting the first volume of the sample carrying gas entering the coil (8), and is electrically connected with the display control panel (4);

the second gas flow sensor (32) is arranged between the coil (8) and the pneumatic valve (9), is used for detecting a second volume of the sample-carrying gas after passing through the coil (8), and is electrically connected with the display control panel (4);

the first air pressure sensor (25) is arranged at the sample carrying gas inlet (5), is used for detecting a first air pressure value of the sample carrying gas entering the coil (8), and is electrically connected with the display control panel (4);

the second air pressure sensor (26) is arranged between the coil pipe (8) and the pneumatic valve (9), is used for detecting a second air pressure value of the sample carrying gas after passing through the coil pipe (8), and is electrically connected with the display control panel (4);

the second temperature sensor (29) is arranged at the sample carrying gas inlet (5), is used for detecting a first temperature value when the sample carrying gas enters the coil (8), and is electrically connected with the display control panel (4);

the third temperature sensor (30) is arranged between the coil pipe (8) and the pneumatic valve (9), is used for detecting a second temperature value of the sample-carrying gas after passing through the coil pipe (8), and is electrically connected with the display control panel (4);

the display control panel (4) acquires the first volume through the first gas flow sensor (24), acquires the second volume through the second gas flow sensor (32), acquires the first air pressure value through the first air pressure sensor (25), acquires the second air pressure value through the second air pressure sensor (26), acquires the first temperature value through the second temperature sensor (29), and acquires the second temperature value through the third temperature sensor (30); the display control panel (4) determines a first parameter of the sample-carrying gas according to the first volume, the first air pressure value and the first temperature value; the display control panel (4) determines a second parameter of the sample-carrying gas according to the second volume, the second air pressure value and the second temperature value; when the difference value of the first parameter and the second parameter is larger than a preset first standard value, outputting first alarm information indicating that the coil (8) has cracks; when the difference value of the first parameter and the second parameter is smaller than a preset second standard value, outputting second alarm information indicating that the coil pipe (8) is blocked;

the third gas flow sensor (33) is arranged at the sample carrying gas outlet (6), is used for detecting a third volume of the sample carrying gas flowing out of the cold trap, and is electrically connected with the display control panel (4);

the third air pressure sensor (27) is arranged at the sample carrying gas outlet (6), is used for detecting a third air pressure value when the sample carrying gas flows out of the cold trap, and is electrically connected with the display control panel (4);

the fourth temperature sensor (31) is arranged at the sample carrying gas outlet (6), is used for detecting a third temperature value when the sample carrying gas flows out of the cold trap, and is electrically connected with the display control panel (4);

the display control panel (4) acquires the third volume through the third gas flow sensor (33), acquires the third gas pressure value through the third gas pressure sensor (27), acquires the third temperature value through the fourth temperature sensor (31), and determines a third parameter of the sample-carrying gas according to the third volume, the third gas pressure value and the third temperature value through the display control panel (4); and when the difference value of the third parameter and the second parameter is larger than a preset third standard value, outputting third alarm information indicating that the dehydration device (11) has cracks.

10. A cold trap according to claim 2 or 4, wherein the display control panel (4) obtains the liquid level height value through the liquid level sensor (21) by the following steps:

sampling data detected by the liquid level sensor (21) for n times in a preset period to obtain n sampling data;

and screening the sampling data, wherein a screening formula is as follows:

wherein, t_iDenotes the ith sample data, t_i+1Represents the i +1 sample data, t_i-1The (i-1) th sampling data is represented, and a, b and c are preset constants;

when the ith sampling data accords with the screening formula, the ith sampling data is reserved, and when the ith sampling data does not accord with the screening formula, the ith sampling data is corrected based on a correction formula, wherein the correction formula is as follows:

wherein d is a preset correction coefficient;

calculating the liquid level height value based on the n filtered and corrected sampling data, wherein a calculation formula is as follows;

wherein H represents a liquid level height value, t_jRepresenting the jth sampling data, wherein alpha is a correction factor;

in a preset second period, the display control panel (4) controls the extension or contraction length of the telescopic mechanism (14) based on the change value of the liquid level height value, and the specific steps are as follows:

wherein L represents the extension or contraction length of the telescopic mechanism (14), Δ H represents the variation value of the liquid level height value, H₀Represents the liquid level height value at the beginning of the second period, A represents the distance value from the bottom end of the telescopic mechanism (14) to the inner wall of the cooling cavity far away from the partition plate (12), and L represents the distance value₀-a current length value of said telescopic mechanism (14); h is the thickness value of the separator (12).

Technical Field

The invention relates to the technical field of chromatographic analysis, and particularly relates to a cold hydrazine.

Background

Currently, a cold trap is a device that prevents vapor or liquid from entering the measurement instrument from the system, or from entering the system from the measurement instrument. It provides a very low temperature surface on which molecules can condense and increase the vacuum by one to two orders of magnitude.

Therefore, during chromatographic analysis, the condensation effect of the cold hydrazine has a crucial influence on the final measurement result of a chromatograph, and is the basis for ensuring the accuracy of the final data, so that a cold hydrazine with a better condensation effect is urgently needed.

Disclosure of Invention

One of the purposes of the invention is to provide a cold trap, wherein a condensing coil can be adjusted according to a preset mode, so that the optimal condensing effect is realized, and the accuracy of the final data of chromatographic analysis is further ensured.

The embodiment of the invention provides a cold hydrazine, which comprises: the cooling device comprises a body, a cooling chamber, an equipment chamber and a display control panel; the display control panel is arranged on the surface of the body; the cooling chamber and the equipment chamber are disposed within the body; the upper end of the body is provided with a sample-carrying gas inlet, a liquid nitrogen inlet and a sample-carrying gas outlet; a coil pipe is arranged in the cooling chamber; the equipment chamber is provided with a vacuum pump, a pneumatic valve and a dehydration device; one end of the coil pipe is communicated with the sample-carrying gas inlet, and the other end of the coil pipe is communicated with the pneumatic valve; the pneumatic valve is respectively connected with the vacuum pump and the dehydration device; the dehydration device is connected with the sample-carrying gas outlet; the liquid nitrogen inlet is communicated with the cooling chamber; the coil is circuitous.

Preferably, the cold trap further comprises a liquid level sensor arranged in the cooling chamber and electrically connected with the display control panel.

Preferably, the cold trap further comprises a first temperature sensor arranged in the cooling chamber and electrically connected with the display control panel.

Preferably, a partition plate is arranged between the cooling chamber and the equipment chamber, and a VCR through plate joint is arranged on the partition plate; one end of the VCR threading joint is connected with the coil pipe, and the other end of the VCR threading joint is connected with the pneumatic valve.

Preferably, the cold hydrazine further comprises: the telescopic mechanism is arranged in the equipment room;

one end of the telescopic mechanism is fixedly connected with the partition plate, and the other end of the telescopic mechanism is fixedly connected with the inner wall of the equipment room;

the baffle realizes adjusting the size in cooling chamber space under telescopic machanism's effect, is provided with the sealing washer in the side of baffle.

Preferably, the coil comprises: a plurality of main pipes and a plurality of telescopic pipes which are arranged in parallel;

the main pipe body and the telescopic pipe body are alternately connected in series to form a circuitous pipeline; the telescopic pipe body positioned at the tail end of the circuitous pipeline is connected with a VCR plate-penetrating joint;

the flexible body includes: a first tube and a second tube;

the first pipe body is sleeved in the second pipe body, and a plurality of annular grooves are formed in the inner wall of the second pipe body; a sealing ring is arranged in the annular groove; two bulges are symmetrically arranged on the outer side of the first pipe body, and a guide groove for accommodating the bulges is arranged on the inner wall of the second pipe body; the guide groove is parallel to the central axis of the second pipe body;

the main pipe body includes: a plurality of cache banks and a plurality of vias;

the two cache bodies are communicated through at least one communicating body; two ends of the telescopic pipe body are respectively communicated with the two main pipes, and the communication position of the two main pipes is positioned on one side of the buffer body.

Preferably, the coil further comprises: the discharging bodies are connected below the lowest cache body of the main pipe body in a one-to-one correspondence manner;

the discharging body comprises:

the unloading channel is communicated with the cache body;

the first baffle and the second baffle are arranged in parallel, and both the first baffle and the second baffle are arranged at a certain angle with the central axis of the unloading channel; one end of the first baffle is fixedly connected with the inner wall of the unloading channel, and a first gap is formed between the other end of the first baffle and the inner wall of the unloading channel; one end of the second baffle close to the first gap is fixedly connected with the inner wall of the discharging channel, and a second gap is formed between the other end of the second baffle and the inner wall of the discharging channel.

Preferably, the coil further comprises: at least one fixed column arranged between the main pipe body far away from the clapboard and the inner wall of the cooling chamber; one end of the fixing column is fixedly connected with the cache body of the main pipe body, and the other end of the fixing column is fixedly connected with the inner wall of the cooling chamber;

the coil pipe comprises at least one limiting body, at least one connecting piece and at least one connecting piece, wherein the limiting body is arranged between one main pipe body and the other main pipe body of the coil pipe and/or between the main pipe body of the coil pipe close to the partition plate and the partition plate;

the spacing body includes: an inner core and a shell; the inner core is sleeved in the shell, a long-strip-shaped through hole is formed in the side face of the shell, and a cylinder is fixedly arranged on the side face of one end, located in the shell, of the inner core; the cylinder is arranged in the strip-shaped through hole in a sliding mode.

Preferably, the cold hydrazine further comprises:

the electric control pressure relief valves are communicated with the discharging body in a one-to-one correspondence mode through pipelines and are electrically connected with the display control panel;

the pressure sensors are correspondingly arranged on the pipelines of the electric control pressure release valve and the material unloading body one by one and are used for detecting the pressure of the pipelines of the electric control pressure release valve and the material unloading body; the pressure sensor is electrically connected with the display control panel; the display control panel detects a pressure value in the pipeline through the pressure sensor, and when the pressure value is larger than a preset first pressure value, the corresponding electronic control pressure release valve is controlled to be opened;

the first gas flow sensor is arranged at the sample carrying gas inlet, is used for detecting the first volume of the sample carrying gas entering the coil pipe, and is electrically connected with the display control panel;

the second gas flow sensor is arranged between the coil pipe and the pneumatic valve, is used for detecting a second volume of the sample-carrying gas after passing through the coil pipe, and is electrically connected with the display control panel;

the first air pressure sensor is arranged at the sample carrying gas inlet, is used for detecting a first air pressure value of the sample carrying gas entering the coil pipe, and is electrically connected with the display control panel;

the second air pressure sensor is arranged between the coil pipe and the pneumatic valve, is used for detecting a second air pressure value of the sample-carrying gas after passing through the coil pipe, and is electrically connected with the display control panel;

the second temperature sensor is arranged at the sample-carrying gas inlet, is used for detecting a first temperature value of the sample-carrying gas entering the coil pipe, and is electrically connected with the display control panel;

the third temperature sensor is arranged between the coil pipe and the pneumatic valve, is used for detecting a second temperature value of the sample-carrying gas after passing through the coil pipe, and is electrically connected with the display control panel;

the display control panel acquires a first volume through the first gas flow sensor, acquires a second volume through the second gas flow sensor, acquires a first gas pressure value through the first gas pressure sensor, acquires a second gas pressure value through the second gas pressure sensor, acquires a first temperature value through the second temperature sensor, and acquires a second temperature value through the third temperature sensor; the display control panel determines a first parameter of the sample-carrying gas according to the first volume, the first air pressure value and the first temperature value; the display control panel determines a second parameter of the sample-carrying gas according to the second volume, the second air pressure value and the second temperature value; when the difference value of the first parameter and the second parameter is larger than a preset first standard value, outputting first alarm information indicating that the coil pipe has a crack; when the difference value of the first parameter and the second parameter is smaller than a preset second standard value, outputting second alarm information indicating that the coil pipe is blocked;

the third gas flow sensor is arranged at the sample carrying gas outlet, is used for detecting the third volume of the sample carrying gas flowing out of the cold trap, and is electrically connected with the display control panel;

the third air pressure sensor is arranged at the sample carrying gas outlet, is used for detecting a third air pressure value when the sample carrying gas flows out of the cold trap, and is electrically connected with the display control panel;

the fourth temperature sensor is arranged at the sample-carrying gas outlet, is used for detecting a third temperature value when the sample-carrying gas flows out of the cold trap, and is electrically connected with the display control panel;

the display control panel acquires a third volume through a third gas flow sensor, acquires a third air pressure value through a third air pressure sensor, acquires a third temperature value through a fourth temperature sensor, and determines a third parameter of the sample-carrying gas according to the third volume, the third air pressure value and the third temperature value; and when the difference value of the third parameter and the second parameter is larger than a preset third standard value, outputting third alarm information indicating that the dehydration device has a crack.

Preferably, the display control panel obtains the liquid level height value through the liquid level sensor, and the specific obtaining steps are as follows:

sampling data detected by a liquid level sensor for n times in a preset period to obtain n sampling data;

and screening the sampling data, wherein the screening formula is as follows:

wherein, t_iDenotes the ith sample data, t_i+1Represents the i +1 th sample data, t_i-1The (i-1) th sampling data is represented, and a, b and c are preset constants;

when the ith sampling data accords with the screening formula, the ith sampling data is reserved, and when the ith sampling data does not accord with the screening formula, the ith sampling data is corrected based on a correction formula, wherein the correction formula is as follows:

wherein d is a preset correction coefficient;

calculating a liquid level height value based on the n filtered and corrected sampling data, wherein a calculation formula is as follows;

wherein H represents a liquid level height value, t_jRepresenting the jth sampling data, and alpha is a correction factor;

in a preset second period, the display control panel controls the extension or contraction length of the telescopic mechanism based on the change value of the liquid level height value, and the specific steps are as follows:

wherein L represents the extension or contraction length of the telescopic mechanism, Δ H represents the variation value of the liquid level height value, H₀The liquid level height value at the beginning of the second period is shown, A is the distance value from the bottom end of the telescopic mechanism to the inner wall of the cooling cavity far away from the partition plate, and L is₀The current length value of the telescopic mechanism; h is the thickness value of the separator.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic illustration of a cold hydrazine in an embodiment of the present invention;

FIG. 2 is a schematic view of another cold hydrazine in the embodiment of the present invention;

FIG. 3 is an enlarged view of FIG. 1A;

FIG. 4 is a schematic cross-sectional view of a telescopic tube according to an embodiment of the present invention;

FIG. 5 is a schematic longitudinal cross-sectional view of a telescopic tube according to an embodiment of the present invention;

FIG. 6 is a schematic view of a main tube according to an embodiment of the present invention;

FIG. 7 is a schematic view of a discharge body according to an embodiment of the present invention;

FIG. 8 is a schematic view of a spacing body according to an embodiment of the invention;

FIG. 9 is a schematic view of another embodiment of the present invention.

In the figure:

1. a body; 2. a cooling chamber; 3. an equipment room; 4. a display control panel; 5. a sample-carrying gas inlet; 6. a sample-carrying gas outlet; 7. a liquid nitrogen inlet; 8. a coil pipe; 9. a pneumatic valve; 10. a vacuum pump; 11. a dewatering device; 12. a partition plate; 13. VCR through board joint; 14. a telescoping mechanism; 15. a primary tube; 16. a telescopic tube body; 17. fixing a column; 18. a limiting body; 19. unloading the material body; 161. a first pipe body; 162. a second tube body; 151. a cache bank; 152. a communicating body; 191. a discharge channel; 192. a second baffle; 193. a first baffle plate; 181. an inner core; 182. a housing; 183. a strip-shaped through hole; 184. a cylinder; 21. a liquid level sensor; 22. a first temperature sensor; 23. a pressure sensor; 24. a first gas flow sensor; 25. a first air pressure sensor; 26. a second air pressure sensor; 27. a third air pressure sensor; 28. an electrically controlled pressure relief valve; 29. a second temperature sensor; 30. a third temperature sensor; 31. a fourth temperature sensor; 32. a second gas flow sensor; 33. a third gas flow sensor.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

An embodiment of the present invention provides a cold hydrazine, as shown in fig. 1, including: a body 1, a cooling chamber 2, an equipment chamber 3 and a display control panel 4; the display control panel 4 is arranged on the surface of the body 1; the cooling chamber 2 and the equipment chamber 3 are arranged in the body 1; a sample-carrying gas inlet 5, a liquid nitrogen inlet 7 and a sample-carrying gas outlet 6 are arranged at the upper end of the body 1; a coil 8 is arranged in the cooling chamber 2; a vacuum pump 10, an air-operated valve 9 and a dehydration device 11 are provided in the equipment room 3; one end of the coil 8 is communicated with the sample-carrying gas inlet 5, and the other end is communicated with the pneumatic valve 9; the pneumatic valve 9 is respectively connected with a vacuum pump 10 and a dehydration device 11; the dehydration device 11 is connected with the sample-carrying gas outlet 6; the liquid nitrogen inlet 7 is communicated with the cooling chamber 2; the coil 8 is of the serpentine type.

The working principle and the beneficial effects of the technical scheme are as follows:

before use, liquid nitrogen is required to be injected into the cooling chamber 2 from the liquid nitrogen inlet 7, so that the liquid nitrogen reaches a set liquid level; when the device is used, firstly, the display control panel 4 controls the vacuum pump 10 to vacuumize the coil pipe 8, air in the coil pipe 8 is pumped out, then, sample-carrying gas is controlled to enter the coil pipe 8 from the sample-carrying gas inlet 5, and at the moment, the display control panel 4 connects the pneumatic valve 9 with the dehydration device 11; the sample carrying gas passes through the circuitous coil 8, so that the time of the sample carrying gas in the cooling chamber 2 is prolonged, and the condensation effect is improved. The display control panel 4 is a component integrating a display, a controller, and keys, and is a control center. The coil 8 can endure ultra-low temperature and ultra-high pressure; the vacuum system based on the vacuum pump 10 may be an electronic control type or a push button type.

The cold trap of the invention, the coil pipe 8 arranged in a circuitous way, prolongs the time of the sample-carrying gas in the cooling chamber 2, thereby improving the condensation effect and further ensuring the accuracy of the final data of chromatographic analysis.

In one embodiment, as shown in fig. 9, the cold trap further comprises a liquid level sensor 21 disposed in the cooling chamber 2 and electrically connected to the display control panel 4.

The working principle and the beneficial effects of the technical scheme are as follows:

the liquid level of liquid nitrogen in the cooling chamber 2 is detected by a liquid level sensor 21, and when the liquid level is lower than the set lowest liquid level, a low liquid level alarm is sent out; or when the liquid level is higher than the set highest liquid level, a high liquid level alarm is sent out, the visualization of the liquid level of the cooling cavity is realized when a user adds liquid nitrogen, and the operation safety is improved.

In one embodiment, as shown in fig. 9, the cold trap further includes a first temperature sensor 22 disposed in the cooling chamber 2 and electrically connected to the display control panel 4.

The working principle and the beneficial effects of the technical scheme are as follows:

the temperature in the cooling chamber 2 is monitored by the first temperature sensor 22, so that the condensation condition of the cold hydrazine meets the condensation requirement of the sample-carrying gas.

In one embodiment, as shown in fig. 1 and 2, a partition plate 12 is provided between the cooling chamber 2 and the equipment chamber 3, and a VCR through-plate joint 13 is provided on the partition plate 12; one end of a VCR threading connector 13 is connected with the coil pipe 8, and the other end is connected with the pneumatic valve 9.

The working principle and the beneficial effects of the technical scheme are as follows:

the VCR bulkhead 13 provides a good sealing effect to separate the cooling chamber 2 from the equipment, on the one hand reducing the dissipation of the cooler cold air and on the other hand preventing the cold air from affecting the equipment in the equipment chamber.

In one embodiment, as shown in fig. 2, the cold hydrazine further comprises: a telescopic mechanism 14 provided in the equipment room 3;

one end of the telescopic mechanism 14 is fixedly connected with the partition plate 12, and the other end of the telescopic mechanism is fixedly connected with the inner wall of the equipment room 3;

the partition plate 12 is used for adjusting the size of the space of the cooling chamber 2 under the action of the telescopic mechanism 14, and a sealing ring is arranged on the side surface of the partition plate 12.

As shown in fig. 3, the coil 8 includes: a plurality of main pipes 15 and a plurality of telescopic pipes 16 arranged in parallel;

the main pipe body 15 and the telescopic pipe body 16 are alternately connected in series to form a circuitous pipeline; the telescopic pipe body 16 positioned at the tail end of the circuitous pipeline is connected with the VCR through plate joint 13;

as shown in fig. 4 and 5, the telescopic tube body 16 includes: a first tube 161 and a second tube 162;

the first tube 161 is sleeved in the second tube 162, and a plurality of annular grooves are formed in the inner wall of the second tube 162; a sealing ring is arranged in the annular groove; two bulges are symmetrically arranged on the outer side of the first pipe body 161, and a guide groove for accommodating the bulges is arranged on the inner wall of the second pipe body 162; the guide groove is parallel to the central axis of the second tube 162;

as shown in fig. 6, the main pipe body 15 includes: a plurality of buffers 151 and a plurality of vias 152;

the buffer bodies 151 are communicated with each other through at least one communicating body 152; the two ends of the telescopic tube 16 are respectively communicated with the two main tubes 15, and the communication position is located on one side of the buffer 151.

The working principle and the beneficial effects of the technical scheme are as follows:

the telescopic mechanism 14 is matched with the telescopic pipe body 16, and the telescopic of the coil pipe 8 is adjustable; the length that coil pipe 8 can carry a sample gas condensing channel according to the sample gas of carrying of difference and different test condition adjustment coil pipe 8 has been realized, and then reached the condensation effect of ideal. The body 15 is responsible for through the cross connection of buffer memory body 151 with the link 152, and buffer memory body 151 can realize the buffer memory of the liquid of condensation, and link 152 has increased the area of contact of year appearance gas with the liquid nitrogen, has improved the condensation effect, in addition, adopts to be provided with a plurality of link 152 between two buffer memory bodies 151, can effectively reduce the probability that coil pipe 8 was blockked up to the condensate. In the telescopic tube 16, the cooperation of the guide groove and the protrusion is used to prevent the first tube 161 and the second tube 162 from being deflected during the telescopic process, and to prevent abrasion due to the deflection.

In one embodiment, as shown in fig. 3, the coiled tubing 8 further comprises: the discharging bodies 19 are connected below the buffer body 151 at the lowest part of the main pipe 15 in a one-to-one correspondence manner;

as shown in fig. 7, the discharging body 19 includes:

the unloading channel 191 is communicated with the cache body 151;

the first baffle 193 and the second baffle 192 are arranged in parallel, and both the first baffle 193 and the second baffle 192 are arranged at a certain angle with the central axis of the discharging channel 191; one end of the first baffle 193 is fixedly connected with the inner wall of the discharging channel 191, and a first gap is formed between the other end of the first baffle and the inner wall of the discharging channel 191; one end of the second baffle 192, which is close to the first gap, is fixedly connected with the inner wall of the discharge channel 191, and a second gap exists between the other end of the second baffle and the inner wall of the discharge channel 191.

The working principle and the beneficial effects of the technical scheme are as follows:

the liquid that main 15 body condensed off, from getting into the discharge way 191 in the unloading body 19, pile up in first clearance, when piling up and submerging the end of first baffle 193, form the linker, the liquid that condenses off at this moment can continue to fall through first baffle 193 and second baffle 192, but gaseous can not spill over from the unloading body 19 again, so, when using, at first when waiting liquid to pile up and submerging the end of first baffle 193, open the automatically controlled relief valve 28 who is connected with the unloading body 19, realize the condensation to the sample-carrying gas on one side, discharge the condensate liquid on one side, guarantee that the coil pipe 8 can not be blockked up by the condensate liquid, the removal efficiency such as oil vapor when sample-carrying ware gas passes through coil pipe 8 is improved.

In one embodiment, as shown in fig. 3, the coiled tubing 8 further comprises: at least one fixing column 17 arranged between the main pipe body 15 far away from the partition plate 12 and the inner wall of the cooling chamber 2; one end of the fixing column 17 is fixedly connected with the buffer storage body 151 of the main pipe body 15, and the other end of the fixing column is fixedly connected with the inner wall of the cooling chamber 2;

at least one limiting body 18 arranged between one main pipe body 15 and the other main pipe body 15 of the coil 8 and/or between the main pipe body 15 of the coil 8 close to the partition plate 12 and the partition plate 12;

as shown in fig. 8, the spacing body 18 includes: an inner core 181 and a shell 182; the inner core 181 is sleeved in the shell 182, a long strip-shaped through hole 183 is arranged on the side surface of the shell 182, and a cylinder 184 is fixedly arranged on the side surface of one end of the inner core 181 positioned in the shell 182; the cylinder 184 is slidably disposed in the elongated through hole 183.

The working principle and the beneficial effects of the technical scheme are as follows:

the limiting body 18 plays a role of connecting two adjacent main pipe bodies 15, so that when the coil pipe 8 moves under the action of the telescopic mechanism 14, the integral stability of the coil pipe 8 is maintained, and the telescopic pipe body 16 is protected; the fixing body plays a role in connecting the coil pipe 8 with the inner wall of the cooling cavity and fixes the coil pipe 8 on the inner wall of the cooling cavity.

In one embodiment, as shown in fig. 9, the cold hydrazine further comprises:

the electronic control pressure relief valves 28 are communicated with the discharging body 19 in a one-to-one correspondence mode through pipelines, and the electronic control pressure relief valves 28 are electrically connected with the display control panel 4;

the pressure sensors 23 are arranged on the pipelines of the electronic control pressure relief valve 28 and the discharging body 19 in a one-to-one correspondence manner and are used for detecting the pressure of the pipelines of the electronic control pressure relief valve 28 and the discharging body 19; the pressure sensor 23 is electrically connected with the display control panel 4; the display control panel 4 detects a pressure value in the pipeline through the pressure sensor 23, and controls the corresponding electronic control pressure release valve 28 to open when the pressure value is greater than a preset first pressure value;

the first gas flow sensor 24 is arranged at the sample carrying gas inlet 5, is used for detecting the first volume of the sample carrying gas entering the coil 8, and is electrically connected with the display control panel 4;

the second gas flow sensor 32 is arranged between the coil 8 and the pneumatic valve 9, is used for detecting the second volume of the sample-carrying gas passing through the coil 8, and is electrically connected with the display control panel 4;

the first air pressure sensor 25 is arranged at the sample carrying gas inlet 5, is used for detecting a first air pressure value of the sample carrying gas entering the coil 8, and is electrically connected with the display control panel 4;

the second air pressure sensor 26 is arranged between the coil 8 and the pneumatic valve 9, is used for detecting a second air pressure value of the sample-carrying gas after passing through the coil 8, and is electrically connected with the display control panel 4;

the second temperature sensor 29 is arranged at the sample-carrying gas inlet 5, is used for detecting a first temperature value of the sample-carrying gas entering the coil 8, and is electrically connected with the display control panel 4;

the third temperature sensor 30 is arranged between the coil 8 and the pneumatic valve 9, is used for detecting a second temperature value of the sample-carrying gas after passing through the coil 8, and is electrically connected with the display control panel 4;

the display control panel 4 acquires a first volume through the first gas flow sensor 24, acquires a second volume through the second gas flow sensor 32, acquires a first air pressure value through the first air pressure sensor 25, acquires a second air pressure value through the second air pressure sensor 26, acquires a first temperature value through the second temperature sensor 29, and acquires a second temperature value through the third temperature sensor 30; the display control panel 4 determines a first parameter of the sample-carrying gas according to the first volume, the first air pressure value and the first temperature value; the display control panel 4 determines a second parameter of the sample-carrying gas according to the second volume, the second air pressure value and the second temperature value; when the difference value of the first parameter and the second parameter is larger than a preset first standard value, outputting first alarm information indicating that the coil 8 has a crack; when the difference value of the first parameter and the second parameter is smaller than a preset second standard value, outputting second alarm information indicating that the coil 8 is blocked;

the third gas flow sensor 33 is arranged at the sample carrying gas outlet 6, is used for detecting the third volume of the sample carrying gas flowing out of the cold trap, and is electrically connected with the display control panel 4;

the third air pressure sensor 27 is arranged at the sample carrying gas outlet 6, is used for detecting a third air pressure value when the sample carrying gas flows out of the cold trap, and is electrically connected with the display control panel 4;

the fourth temperature sensor 31 is arranged at the sample carrying gas outlet 6, is used for detecting a third temperature value when the sample carrying gas flows out of the cold trap, and is electrically connected with the display control panel 4;

the display control panel 4 acquires a third volume through the third gas flow sensor 33, acquires a third gas pressure value through the third gas pressure sensor 27, acquires a third temperature value through the fourth temperature sensor 31, and determines a third parameter of the sample-carrying gas according to the third volume, the third gas pressure value and the third temperature value; and when the difference value between the third parameter and the second parameter is larger than a preset third standard value, outputting third alarm information indicating that the dehydration device 11 has a crack.

The working principle and the beneficial effects of the technical scheme are as follows:

whether the condensed liquid is accumulated at the tail end of the submerged first baffle 193 is judged through the pressure value of the pressure sensor 23, so that the electronic control pressure release valve 28 connected with the discharging body 19 is opened, the condensed liquid is discharged while the sample-carrying gas is condensed, the coil 8 is prevented from being blocked by the condensed liquid, and the removal efficiency of oil vapor and the like when the sample-carrying gas passes through the coil 8 is improved. The display control panel 4 determines a first parameter of the sample-carrying gas according to the first volume, the first air pressure value and the first temperature value; the display control panel 4 determines a second parameter of the sample-carrying gas according to the second volume, the second air pressure value and the second temperature value; when the difference value of the first parameter and the second parameter is larger than a preset first standard value, outputting first alarm information indicating that the coil 8 has a crack; when the difference value of the first parameter and the second parameter is smaller than a preset second standard value, outputting second alarm information indicating that the coil 8 is blocked; failure detection of the coil 8 is achieved. The display control panel 4 determines a third parameter of the sample-carrying gas according to the third volume, the third air pressure value and the third temperature value; when the difference value between the third parameter and the second parameter is larger than a preset third standard value, outputting third alarm information indicating that the dehydration device 11 has a crack; the malfunction detection of the dehydration engine 11 is realized. Wherein the first parameter, the second parameter and the third parameter can all be formulatedAnd calculating, wherein P is a gas pressure value, V is a gas volume, R is a universal gas constant, the value of the universal gas constant is related to the unit of the state parameter, R is 8.31J/(mol. K) in the international system of units, and T is a thermodynamic temperature. The first standard value, the second standard value, and the third standard value are set values obtained empirically. This is achieved byIn addition, the final temperature of the condensed gas is detected through a second temperature sensor 29, and when the final temperature of the gas is lower than a preset minimum temperature value, an alarm signal is sent out; further, the telescoping mechanism 14 may be extended to reduce the length of the coil 8 exposed to the cooling chamber 2 and increase the final temperature value.

In one embodiment, the display control panel 4 obtains the liquid level height value through the liquid level sensor 21, and the obtaining steps are as follows:

sampling data detected by the liquid level sensor 21 for n times in a preset period to obtain n sampling data;

and screening the sampling data, wherein the screening formula is as follows:

wherein, t_iDenotes the ith sample data, t_i+1Represents the i +1 th sample data, t_i-1The (i-1) th sampling data is represented, and a, b and c are preset constants;

when the ith sampling data accords with the screening formula, the ith sampling data is reserved, and when the ith sampling data does not accord with the screening formula, the ith sampling data is corrected based on a correction formula, wherein the correction formula is as follows:

wherein d is a preset correction coefficient;

calculating a liquid level height value based on the n filtered and corrected sampling data, wherein a calculation formula is as follows;

wherein H represents a liquid level height value, t_jRepresenting the jth sampling data, and alpha is a correction factor;

in a preset second period, the display control panel 4 controls the extension or contraction length of the telescopic mechanism 14 based on the variation value of the liquid level height value, which is as follows:

wherein L represents the extension or contraction length of the telescopic mechanism 14, Δ H represents the variation value of the liquid level height value, H₀The liquid level height at the beginning of the second period is shown, A is the distance from the bottom end of the telescoping mechanism 14 to the inner wall of the cooling chamber away from the partition 12, and L is₀The current length value of the telescoping mechanism 14; h is the thickness value of the separator 12.

The working principle and the beneficial effects of the technical scheme are as follows:

screening and correcting the sampling data to eliminate abnormal values and ensure the accuracy of the detected liquid level height value; and introducing variance to carry out error correction when the liquid level height value is finally calculated, so that the finally calculated liquid level height value is more accurate. Based on the liquid level height in the cooling chamber to control telescopic machanism 14, guarantee that coil pipe 8 can dip in the liquid nitrogen under the condition that need not add the liquid nitrogen always to reach the best condensation condition of the interior sample loading gas of coil pipe 8, and then improve the condensation effect.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.