Constant-temperature infrared gas detection device

Abstract

The utility model belongs to the field of oil and gas field exploration and development logging, and particularly relates to a constant-temperature infrared gas detection device. The device comprises a heat preservation box, a heating part, an infrared gas detector, a temperature sensing probe and a temperature control part, wherein the heating part, the infrared gas detector and the temperature sensing probe are arranged in the heat preservation box, and the temperature control part is connected with the heating part and the temperature sensing probe. And the temperature control part is configured to respond to temperature signal feedback of the temperature sensing probe to control the heating part so as to maintain the internal temperature of the heat preservation box within a set range. According to the infrared gas detector, the accuracy of gas detection by using the infrared gas detector can be improved to a great extent, and the infrared gas detector has a good application prospect.

Description

Technical Field

[0001] The utility model belongs to the field of well logging in oil and gas field exploration and development, and specifically relates to a constant temperature infrared gas detection device. Background Art

[0002] During the exploration and development of oil and gas fields, the detection and analysis of formation gas can provide a strong basis and guarantee for the timely and accurate discovery of oil and gas and the pinpointing of target layers. It is a key technology and means in mud logging technology.

[0003] The non-dispersive infrared absorption method (NDIR) is based on the principle that gases have characteristic absorption of infrared light of a specific wavelength. The infrared detector is used to compare the changes in the value of the specific wavelength light source before and after it passes through the gas to be measured, thereby achieving the purpose of measuring the gas concentration. The infrared gas detector developed based on this principle has the advantages of anti-poisoning, wide applicable temperature range, good long-term stability, and low maintenance cost. It has become a common device for detecting gases such as methane and carbon dioxide.

[0004] Studies have shown that temperature is an important parameter that affects the measurement accuracy of infrared gas detectors. Temperature changes will affect factors such as gas absorption, light sources, filters, detectors, and absorption cells, making the infrared gas detector indication value nonlinearly positively correlated with temperature. In actual tests, researchers also found that changes in ambient temperature can cause baseline drift and large fluctuations in gas detection curves, poor repeatability in detection results, and other problems, which seriously affect the quality level of gas testing.

[0005] How to overcome the adverse effects of large changes in the test environment temperature on infrared gas detectors during testing in order to obtain highly accurate measurement results has become a technical problem that needs to be solved urgently. Utility Model Content

[0006] Aiming at some or all of the problems existing in the prior art, the utility model provides a constant temperature infrared gas detection device.

[0007] The constant temperature infrared gas detection device comprises:

[0008] Incubator;

[0009] A heating unit, an infrared gas detector and a temperature sensing probe are all arranged inside the incubator; and

[0010] a temperature control unit, configured to be connected to the heating unit and the temperature sensing probe,

[0011] The temperature control unit is configured to control the heating unit in response to the temperature signal feedback from the temperature sensing probe, so as to maintain the internal temperature of the thermal insulation box within a set range.

[0012] As an extension of the above technical solution, the present invention also provides the following embodiments:

[0013] The temperature control unit includes a controller and a relay. The temperature sensing probe is configured to be connected to the controller, and the relay is configured to be connected between the controller and the heating unit.

[0014] The heating unit includes a heater and a fan disposed adjacent to the heater.

[0015] The heater is one or more of a heating tube, a heating belt and a silicone rubber heating plate.

[0016] The distance between the temperature sensing probe and the heating part is greater than the distance between the temperature sensing probe and the infrared gas detector.

[0017] The temperature sensing probe is a thermocouple temperature sensing probe or a platinum resistance temperature sensing probe.

[0018] The insulation box is constructed such that the inner side is covered with a fireproof insulation material of a certain thickness.

[0019] The fireproof heat-insulating material is one or more of aluminum silicate heat-insulating cotton, heat-insulating coating and silicone rubber foaming material.

[0020] The thermal insulation box comprises a box body and an upper flip cover, and the upper flip cover is connected to the box body via a hinge.

[0021] A buckle pressing assembly is arranged between the upper flip cover and the box body.

[0022] The advantages of the utility model compared to the prior art are:

[0023] Through the design and combined use of components such as the incubator, temperature sensing probe, heating unit and temperature control unit, constant temperature control of the internal environment of the incubator is achieved, so that the working temperature of the infrared gas detector inside the incubator can be controlled within a relatively stable range, thereby greatly improving the accuracy of the gas detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a constant temperature infrared gas detection device according to the utility model.

[0025] All drawings in the present invention are schematic diagrams for illustrating structures and principles, and are not necessarily drawn according to actual sizes and proportions.

[0026] The specific meanings of the reference numerals in the figures are as follows:

[0027] 1. Insulation box; 11. Box body; 2. Heating unit; 21. Heater; 22. Fan; 3. Infrared gas detector; 4. Temperature sensing probe; 5. Temperature control unit; 51. Controller; 52. Relay; 6. Gas pipeline; 7. Signal line; 8. Electric wire; 9. Power supply; 100. Constant temperature infrared gas detection device. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0029] Figure 1 The figure is a schematic diagram of the structure of a constant temperature infrared gas detection device 100 (hereinafter referred to as "device 100") according to the utility model. As shown in the figure, the device 100 includes an insulated box 1, a heating part 2, an infrared gas detector 3 and a temperature sensing probe 4, all of which are arranged inside the insulated box 1, and a temperature control part 5 with a temperature setting function that is connected to the heating part 2 and the temperature sensing probe 4. In addition, the temperature control part 5 is also configured to control the heating part 2 in response to the temperature signal feedback from the temperature sensing probe 4, so as to maintain the temperature inside the insulated box 1 within a set range, so that the working temperature of the infrared gas detector 3 inside the insulated box 1 is maintained in a relatively stable range.

[0030] During the specific operation, the staff assembles the device 100 and connects it to the power supply 9, and then sets the temperature range to be reached in the incubator 1 at the temperature control unit 5 according to the test requirements (the difference between the upper and lower limits of the temperature range is small). After the device 100 has been running for a certain period of time, under the combined effect of the temperature control unit 5, the temperature sensing probe 4 and the heater 2, the temperature in the incubator 1 reaches the set range and is maintained within the temperature range. At this time, the staff turns on the infrared gas detector 3 to detect the gas to be tested. Since the temperature inside the incubator 1 is always within the set temperature range, the infrared gas detector 3 can detect the gas to be tested at a relatively constant operating temperature, thereby eliminating the problems of baseline drift and large fluctuations of the gas detection curve caused by the large changes in the operating temperature, and poor repeatability of the detection results. Finally, the device 100 is used to perform high-accuracy concentration detection of the gas to be tested.

[0031] Through this design, the working temperature of the infrared gas detector 3 can be maintained within a set range with small fluctuations, thereby greatly reducing the adverse effects of drastic changes in ambient temperature and heat dissipation of internal circuit components of the device 100 on the test results, thereby improving the accuracy of the results of detecting the gas to be tested using the infrared gas detector 3.

[0032] like Figure 1As shown, in one embodiment of the present invention, the temperature control unit 5 includes a controller 51 and a relay 52. ​​The temperature sensing probe 4 is configured to be connected to the controller 51, and the relay 52 is configured to be connected between the controller 51 and the heating unit 2. Through this design, the temperature control unit 5 is divided into a controller 51 with calculation, analysis and control functions and a relay 52 for receiving instructions from the controller 51 to control the power on and off of the heating unit 2, thereby making the structural level of the temperature control unit 51 clearer and facilitating the installation and maintenance of the temperature control unit 5 by the staff. In addition, by connecting the controller 51 with the temperature sensing probe 4 and arranging the relay 52 between the heating unit 2 and the controller 51, the temperature change signal generated by the temperature sensing probe 4 can be transmitted to the controller 51 more quickly so that the controller 51 can calculate and judge, and then the heating unit 2 can be quickly controlled by controlling the relay 52, and finally the temperature inside the incubator 1 can be quickly and accurately adjusted.

[0033] like Figure 1 As shown, in one embodiment of the utility model, the heating unit 2 includes a heater 21 and a fan 22 disposed adjacent to the heater 21. Through this design, the heating unit 2 can use the heater 21 to achieve a heating function, and can also use the fan 22 disposed adjacent to the heater 21 to accelerate the air flow inside the heat preservation box 1, so that the heat preservation box 1 is heated evenly. That is, through this design, a more suitable working environment can be created for the infrared gas detector 3 more quickly, which helps to further improve the accuracy of the measurement results of the device 100.

[0034] In one embodiment of the present invention, for the consideration of economy and heating stability, the heater 21 is selected to be one or more of a heating tube, a heating belt and a silicone rubber heating plate.

[0035] Preferably, the heater 21 is selected to be a silicone rubber heating plate.

[0036] In one embodiment of the utility model, the distance between the temperature sensing probe 4 and the heating part 2 is greater than the distance between the temperature sensing probe 4 and the infrared gas detector 3. Through this design, the temperature sensed by the temperature sensing probe 4 can be closer to the temperature value around the infrared gas detector 3, and the influence of the heating part 2 as a heat source on the value sensed by the temperature sensing probe 4 can be reduced, so that the temperature sensing probe 4 can more truly reflect the ambient temperature around the infrared gas detector 3, and improve the effectiveness of the temperature control part 5 in controlling temperature changes.

[0037] Preferably, the temperature sensing probe 4 is arranged as far away from the heating part 2 as possible and as close to the infrared gas detector 3 as possible without causing mutual interference.

[0038] In one embodiment of the present invention, for the sake of economy and detection stability, the temperature sensing probe 4 is selected to be a thermocouple temperature sensing probe or a platinum resistance temperature sensing probe.

[0039] Preferably, the temperature sensing probe 4 is selected to be a Pt100 platinum resistance temperature sensing probe.

[0040] In one embodiment of the utility model, the heat preservation box 1 is constructed to be covered with a certain thickness of fireproof heat preservation material on the inside. Through this design, while enhancing the heat preservation function of the heat preservation box 1, it can also achieve the fireproof function, thereby improving the overall operation safety of the device 100.

[0041] Preferably, the fireproof heat-insulating material is selected to be one or more of aluminum silicate heat-insulating wool, heat-insulating coating and silicone rubber foam material.

[0042] Preferably, the fireproof and heat-insulating material is selected as silicone rubber foam material.

[0043] Preferably, the thickness of the fireproof and heat-insulating material covering the inner side of the heat-insulating box 1 is not less than 3 cm.

[0044] like Figure 1 As shown, in one embodiment of the utility model, the incubator 1 includes a box body 11 and an upper flip cover (not shown, the same below), and the upper flip cover is connected to the box body 11 through a hinge (not shown). Through this design, the staff can open the incubator 1 by operating the upper flip cover, thereby facilitating the installation and maintenance of the components inside the incubator 1.

[0045] Furthermore, in one embodiment of the utility model, in order to ensure the internal insulation effect of the insulation box 1, a buckle clamping assembly (not shown, the same below) is provided between the upper flip cover and the box body 11 to ensure that a tight connection can be achieved between the upper flip cover and the box body 11.

[0046] In one embodiment of the present invention, the controller 51 is a Yudian 516P intelligent temperature controller.

[0047] In one embodiment of the present invention, the relay 52 is a solid-state relay.

[0048] In a preferred embodiment of the present invention, a digital display screen and buttons are provided on the outside of the controller 51 for displaying the temperature inside the incubator 1 in real time and for setting the temperature inside the incubator 1 .

[0049] like Figure 1As shown, in one embodiment of the present invention, the infrared gas detector 3 is constructed to achieve communication with the external gas to be tested through the gas pipeline 6. Through this design, the communication between the external gas to be tested and the infrared gas detector 3 is achieved, ensuring the normal performance of the detection function of the device 100.

[0050] like Figure 1 As shown, in one embodiment of the present invention, the temperature sensing probe 4 is configured to be connected to the temperature control unit 5 via a signal line 7. Through this design, smooth signal transmission between the temperature sensing probe 4 and the temperature control unit 5 is achieved, ensuring the normal function of the device 100.

[0051] like Figure 1 As shown, in one embodiment of the present invention, the relay 52 is configured to be connected to the controller 51 and the heating unit 2 via the wire 8. Through this design, the relay 52 is smoothly connected to the controller 51 and the heating unit 2, ensuring the normal function of the device 100.

[0052] In one embodiment of the present invention, holes for the gas pipeline 6 , the signal line 7 and the electric wire 8 to enter and exit are reserved on the box body 11 .

[0053] In one embodiment of the present invention, when the outside temperature is between 20 and 35°C and the temperature of the device 100 is set to 40°C, the temperature inside the incubator 1 can be stably maintained within the range of 38.5 to 40.5°C.

[0054] In one embodiment of the present invention, the controller 51 can set the temperature in the range of 0 to 80°C.

[0055] According to the device 100 of the utility model, through the design and combined use of the components such as the heat preservation box 1, the temperature sensing probe 4, the heating part 2 and the temperature control part 5, the relative constant temperature control of the internal environment of the heat preservation box 1 is achieved, so that the working temperature of the infrared gas detector 3 inside the heat preservation box 1 can be controlled within a relatively stable range, thereby greatly improving the accuracy of the gas detection result. In addition, the device 100 reduces the thickness and volume of the heat preservation box 1 by arranging the temperature control part 5 outside the heat preservation box 1, realizes the miniaturized design of the heat preservation box 1, and facilitates the embedding of the heat preservation box 1 into application equipment such as the logging acquisition unit, thereby reducing the application difficulty of the device 100 and expanding the application range of the device 100.

[0056] It should be noted that the application scope of the device 100 is not limited to the oil and gas field exploration and development gas measurement industry, but can also be used in various other scenarios that require accurate measurement of hydrocarbon or non-hydrocarbon gas concentrations.

[0057] In the present invention, the specific structures and working principles of the controller 51 and the relay 52 are well known to those skilled in the art and will not be described in detail herein.

[0058] In the present invention, the specific meanings of the terms "upper", "lower", "left", "right", "inner", "outer", "middle", "side" and the like when indicating directions are as follows: Figure 1 The drawing state of the device 100 is used as a reference.

[0059] Finally, it should be noted that although the present invention has been described in detail with reference to the preferred embodiments, various improvements may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A constant temperature infrared gas detection device, characterized in that: include: Incubator (1); A heating unit (2), an infrared gas detector (3) and a temperature sensing probe (4) all arranged inside the heat preservation box (1); and The temperature control unit (5) is configured to be connected to the heating unit (2) and the temperature sensing probe (4). The temperature control unit (5) is configured to control the heating unit (2) in response to the temperature signal feedback from the temperature sensing probe (4), so as to maintain the internal temperature of the thermal insulation box (1) within a set range.

2. The constant temperature infrared gas detection device according to claim 1, characterized in that: The temperature control unit (5) comprises a controller (51) and a relay (52); the temperature sensing probe (4) is configured to be connected to the controller (51); and the relay (52) is configured to be connected between the controller (51) and the heating unit (2).

3. The constant temperature infrared gas detection device according to claim 2, characterized in that: The heating portion (2) comprises a heater (21) and a fan (22) arranged adjacent to the heater (21).

4. The constant temperature infrared gas detection device according to claim 3, characterized in that: The heater (21) is one or more of a heating tube, a heating belt and a silicone rubber heating plate.

5. The constant temperature infrared gas detection device according to claim 4, characterized in that: The distance between the temperature sensing probe (4) and the heating portion (2) is greater than the distance between the temperature sensing probe (4) and the infrared gas detector (3).

6. The constant temperature infrared gas detection device according to claim 5, characterized in that: The temperature sensing probe (4) is a thermocouple temperature sensing probe or a platinum resistance temperature sensing probe.

7. The constant temperature infrared gas detection device according to any one of claims 1 to 6, characterized in that: The heat preservation box (1) is constructed such that the inner side is covered with a fireproof heat preservation material of a certain thickness.

8. The constant temperature infrared gas detection device according to claim 7, characterized in that: The fireproof heat-insulating material is one or more of aluminum silicate heat-insulating cotton, heat-insulating coating and silicone rubber foaming material.

9. The constant temperature infrared gas detection device according to any one of claims 1 to 6, characterized in that: The thermal insulation box (1) comprises a box body (11) and an upper flip cover, wherein the upper flip cover and the box body (11) are connected via a hinge.

10. The constant temperature infrared gas detection device according to claim 9, characterized in that: A buckle pressing assembly is provided between the upper flip cover and the box body (11).

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