Pumping type multi-parameter measuring device

Abstract

The utility model discloses a pumping type multi-parameter measuring device, which comprises a main shell, a passive ventilation device, a gas detection unit, a suction device, a power supply and a controller, and is characterized in that the main shell comprises a diffusion cavity, a communication cavity, a detection cavity and a control cavity which are communicated in sequence; the passive ventilation device is rotatably arranged in the diffusion cavity, an angular velocity sensor is arranged on the passive ventilation device, and the multiple gas detection units are all arranged in the detection cavity; the suction device, the power supply and the controller are all arranged in the control cavity, and the suction device is communicated with the detection cavity; the suction device and the angular velocity sensor are respectively connected with the controller; the power supply is electrically connected with the suction device, the angular velocity sensor and the controller, so that the accuracy and the efficiency of pump suction type sampling in a quiet wind or breeze environment are ensured, detection can be carried out by utilizing a natural diffusion principle when external wind power is enough, and unnecessary energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas measurement, in particular to a pump-suction type multi-parameter measuring device. Background Art

[0002] Currently, the demand for gas detection in environmental monitoring and industrial safety is growing, especially in complex and changing environments such as chemical plants, mines, tunnel construction, etc., where accurate and rapid measurement of multiple gas parameters (such as oxygen concentration, harmful gas content, combustible gas concentration, etc.) is crucial.

[0003] Traditional gas detectors often rely on natural diffusion to collect gas. However, this method is inefficient due to natural diffusion, especially when the wind speed at the installation location is low, making it difficult to obtain sufficient gas samples. Therefore, more and more multi-parameter gas measurements are now collecting gas samples through active suction (for example, a suction pump is installed to accelerate the air flow in the detection area through the suction action of the suction pump).

[0004] For example, a multi-parameter gas collection and measurement system for mining with application number CN202123277680.6, the air outlet is connected to the air pump arranged in the shell through a connecting pipe, and the air pump is connected to the air outlet nozzle arranged on the peripheral wall of the shell through the air outlet pipe. By turning on the air pump, the flow of air can be accelerated, so that more air is drawn into the gas temporary storage chamber, and the gas composition is measured by the gas sensor.

[0005] However, this patent still has some problems in actual use. For example, when the equipment is deployed in a fixed location that requires long-term continuous monitoring, the air pump is frequently activated to maintain gas suction, which places high demands on the continuous supply of power. In scenarios with limited power capacity, the high-energy consumption of the air pump requires frequent charging and maintenance, which not only increases the workload of the operator, but also affects the continuity and stability of the monitoring task. This practical problem urgently needs an effective solution. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent.

[0007] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a pump-suction multi-parameter measuring instrument, comprising: a main shell, a passive ventilation device, a gas detection unit, a suction device, a power supply and a controller, wherein the main shell comprises a diffusion chamber, a connecting chamber, a detection chamber and a control chamber connected in sequence; the passive ventilation device comprises a rotating shaft, external blades and internal blades, wherein the rotating shaft is rotatably arranged in the diffusion chamber, and the top of the rotating shaft extends to the outside of the main shell, and the bottom of the rotating shaft extends to the connecting chamber, and an angular velocity sensor is arranged on the rotating shaft; the external blades are arranged at the top of the rotating shaft; the internal blades are arranged in the connecting chamber and connected to the bottom of the rotating shaft; multiple gas detection units are all arranged in the detection chamber; the suction device, the power supply and the controller are all arranged in the control chamber, wherein the suction device is connected to the detection chamber; the suction device and the angular velocity sensor are respectively connected to the controller; the power supply is electrically connected to the suction device, the angular velocity sensor and the controller.

[0008] In addition, the pump-suction multi-parameter measuring device proposed in the present invention may also have the following additional technical features:

[0009] As a further description of the above technical solution: a detachable first filter is provided on the front of the diffusion chamber, which can be disassembled and assembled by a threaded connection. A plurality of ventilation slots are provided on both sides of the diffusion chamber, so that the gas can diffuse into the diffusion chamber from multiple directions.

[0010] As a further description of the above technical solution: the pump-suction multi-parameter measuring instrument also includes a connecting pipe, one end of which is connected to the connecting cavity, and the other end extends to the outside of the main shell. A second filter is provided at the air inlet of the connecting pipe to further improve the gas entry under natural diffusion mode.

[0011] As a further description of the above technical solution: the suction device includes a pump body, an air suction pipe and an exhaust pipe, wherein the pump body is arranged in the control cavity; one end of the air suction pipe is connected to the detection cavity, and the other end is connected to the pump body; one end of the exhaust pipe is connected to the pump body, and the other end extends to the outside of the control cavity.

[0012] As a further description of the above technical solution: the internal blades are spiral blades, and when the internal blades rotate, they can generate thrust into the detection cavity, thereby promoting the flow of gas into the detection cavity.

[0013] As a further description of the above technical solution: the connecting pipe is connected to the middle of the connecting cavity, and the internal blades are arranged on the side of the connecting cavity close to the diffusion cavity to prevent the internal blades from blocking the gas when they do not rotate, so that the gas can enter the connecting cavity through the connecting pipe.

[0014] As a further description of the above technical solution: ear plates are provided on both sides of the outer wall of the main shell to fix it at the installation position.

[0015] As a further description of the above technical solution: multiple support seats are arranged from top to bottom in the diffusion chamber, the rotating shaft passes through the multiple support seats in sequence, and is rotatably connected to the support seats through bearings. The support of the support seats further improves the stability of the rotating shaft during rotation.

[0016] According to the pump-suction multi-parameter measuring instrument of the present invention, when the wind speed in the detection area is relatively high, gas samples can be collected by diffusion, and the gas can be accelerated to enter the detection chamber through a passive suction device. When the wind speed in the detection area is relatively low, the controller can detect the angular velocity sensor and control the suction device to perform active suction to realize the collection of gas samples, thereby automatically selecting the most appropriate sampling method under different environmental conditions, which not only ensures the accuracy and efficiency of pump-suction sampling in a calm or light breeze environment, but also can use the natural diffusion principle for detection when the external wind is sufficient, reducing unnecessary energy consumption.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic structural diagram of a pump-suction multi-parameter measuring device according to one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of a pump-suction multi-parameter measuring device according to one embodiment of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of a passive ventilation device according to an embodiment of the present utility model;

[0022] As shown in the figure:

[0023] 100. Main shell; 101. First filter; 110. Diffusion chamber; 111. Ventilation slot; 120. Connecting chamber; 130. Detection chamber; 140. Control chamber; 200. Passive ventilation device; 210. Rotating shaft; 220. External blades; 230. Internal blades; 201. Support seat; 300. Connecting pipe; 301. Second filter; 400. Gas detection unit; 500. Suction device; 510. Pump body; 520. Exhaust pipe; 530. Exhaust pipe; 600. Power supply; 700. Controller. DETAILED DESCRIPTION

[0024] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The pump-suction multi-parameter measuring device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0026] like Figures 1 to 3 As shown, the pump-suction multi-parameter measuring device of the embodiment of the present invention can automatically select a suitable gas sample collection method under different ventilation environments to achieve the purpose of energy saving.

[0027] The application number CN202123277680.6 is a multi-parameter gas collection and measurement system for mining (hereinafter referred to as "the patent"), which includes a shell with a protruding gas collection nozzle installed on the peripheral wall of the shell. The gas collection nozzle is connected to the air inlet of the gas temporary storage chamber arranged in the shell through an air inlet pipe, and the air outlet of the gas temporary storage chamber is connected to the air pump arranged in the shell through a connecting pipe, and the air pump is connected to the air outlet nozzle arranged on the peripheral wall of the shell through an air outlet pipe; a gas sensor is connected to the upper part of the gas temporary storage chamber, and the gas sensor is used to measure the composition of the collected gas; the gas collection nozzle is detachably connected to the external extension tube.

[0028] It can be seen from this that this patent relies too much on the air pump when collecting gas samples. Each time a gas sample is collected, the air pump needs to be turned on, and the external gas needs to be sucked into the air inlet pipe through the gas collection nozzle and then into the gas storage room. This method consumes too much electricity for long-term and multiple continuous monitoring.

[0029] The pump-suction multi-parameter measuring device of the present invention has low power consumption after being installed at the detection position. That is, when the external wind speed is too high, the external gas enters from the diffusion chamber 110 and enters the detection chamber 130 through the connecting chamber 120, and is detected by the gas of multiple detection units.

[0030] In addition, when the external wind speed is high, the external wind speed drives the external blades 220 to rotate, so that the rotating shaft 210 drives the internal blades 230 to rotate, so that the internal blades 230 push the gas to accelerate into the connecting cavity 120 and the detection cavity 130. Through the passive ventilation device 200, when the external wind speed is high, the flow of gas can be promoted in a way that does not consume electrical energy.

[0031] Therefore, without the drive of an external air pump, the pump-suction multi-parameter measuring instrument of the present invention utilizes the natural environment wind force and the passive ventilation device 200 to work together to realize the effective collection of gas samples. The external blades 220 rotate under the action of wind force, and their movement is transmitted to the internal blades 230 located in the connecting cavity 120 through the rotating shaft 210. The internal blades 230 adopt a spiral design. When they rotate, they can effectively stir the gas in the cavity, form a vortex airflow, and accelerate the delivery of gas to the detection cavity 130, which can significantly reduce the dependence on electric energy and achieve energy-saving effects.

[0032] When the external wind speed is relatively low, the rotation speed of the rotating shaft 210 is relatively low or cannot be rotated. The controller 700 can detect the signal change of the angular velocity sensor on the rotating shaft 210, and the controller 700 suction device 500 sucks the detection chamber 130. At this time, the external air can be accelerated to enter the diffusion chamber 110, and enter the detection chamber 130 through the connecting chamber 120, thereby promoting gas flow by active pumping when the external wind speed is relatively low.

[0033] Therefore, when the wind speed in the detection environment decreases and is insufficient to naturally drive the effective flow of gas, the utility model closely monitors the rotation state of the shaft 210 through the integrated controller 700 and angular velocity sensor. Once it is detected that the angular velocity of the shaft 210 is lower than the preset threshold, indicating that the natural ventilation efficiency is insufficient, the controller 700 immediately turns on the suction device 500, and the suction pipe 520 is connected to the detection chamber 130. When the pump body 510 is working, the gas is actively sucked from the diffusion chamber 110 through the connecting chamber 120 into the detection chamber 130 through the negative pressure effect, ensuring that gas samples can be efficiently collected even under low wind speed conditions. At this stage, although the power consumption increases, compared with the traditional suction pump that runs continuously, the design that is activated only when necessary greatly reduces the overall energy consumption.

[0034] It should be noted that, although the angular velocity sensor also requires power from the power supply 600 , its energy consumption is much less than the energy consumption required when the pump body 510 of the suction device 500 is turned on, thereby achieving an energy-saving effect.

[0035] In summary, according to the pump-suction multi-parameter measuring instrument of the embodiment of the present invention, when the wind speed in the detection area is relatively high, gas samples can be collected by diffusion, and the gas can be accelerated into the detection chamber 130 by the passive suction device 500. When the wind speed in the detection area is relatively low, the controller 700 can detect the angular velocity sensor and control the suction device 500 to perform active suction to realize the collection of gas samples, thereby automatically selecting the most appropriate sampling method under different environmental conditions, which not only ensures the accuracy and efficiency of pump-suction sampling in a calm or light breeze environment, but also can use the natural diffusion principle for detection when the external wind is sufficient, thereby reducing unnecessary energy consumption.

[0036] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0037] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0038] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pump-suction multi-parameter measuring instrument, characterized in that: include: A main housing (100), a passive ventilation device (200), a gas detection unit (400), a suction device (500), a power supply (600) and a controller (700), wherein the main housing (100) includes a diffusion chamber (110), a communication chamber (120), a detection chamber (130) and a control chamber (140) which are connected in sequence; the passive ventilation device (200) includes a rotating shaft (210), external blades (220) and internal blades (230), wherein the rotating shaft (210) is rotatably arranged in the diffusion chamber (110), and the top of the rotating shaft (210) extends to the outside of the main housing (100), and the bottom of the rotating shaft (210) extends to the inside of the communication chamber (120), and an angular velocity sensor is provided on the rotating shaft (210). sensor; the outer blade (220) is arranged at the top of the rotating shaft (210); the inner blade (230) is arranged in the communicating cavity (120) and is connected to the bottom of the rotating shaft (210); a plurality of the gas detection units (400) are arranged in the detection cavity (130); the suction device (500), the power supply (600) and the controller (700) are all arranged in the control cavity (140), wherein the suction device (500) is connected to the detection cavity (130); the suction device (500) and the angular velocity sensor are respectively connected to the controller (700); the power supply (600) is electrically connected to the suction device (500), the angular velocity sensor and the controller (700).

2. A pump-suction multi-parameter measuring instrument according to claim 1, characterized in that: A detachable first filter screen (101) is provided on the front of the diffusion chamber (110), and a plurality of ventilation slots (111) are respectively provided on both sides of the diffusion chamber (110).

3. A pump-suction multi-parameter measuring instrument according to claim 1, characterized in that: It also includes a connecting pipe (300), one end of which is in communication with the communicating cavity (120), and the other end of which extends outside the main housing (100), and a second filter (301) is provided at the air inlet of the connecting pipe (300).

4. A pump-suction multi-parameter measuring instrument according to claim 1, characterized in that: The suction device (500) comprises a pump body (510), an air extraction pipe (520) and an exhaust pipe (530), wherein the pump body (510) is arranged in the control chamber (140); one end of the air extraction pipe (520) is connected to the detection chamber (130), and the other end is connected to the pump body (510); one end of the exhaust pipe (530) is connected to the pump body (510), and the other end extends to the outside of the control chamber (140).

5. The pump-suction multi-parameter measuring device according to claim 1, characterized in that: The internal blades (230) are spiral blades.

6. A pump-suction multi-parameter measuring device according to claim 3, characterized in that: The connecting pipe (300) is in communication with the middle portion of the communication cavity (120), and the internal blades (230) are arranged on a side of the communication cavity (120) close to the diffusion cavity (110).

7. A pump-suction multi-parameter measuring instrument according to claim 1, characterized in that: Lugs are provided on both sides of the outer wall of the main housing (100) to fix it at the installation position.

8. The pump-suction multi-parameter measuring device according to claim 1, characterized in that: A plurality of support seats (201) are arranged from top to bottom in the diffusion chamber (110), and the rotating shaft (210) passes through the plurality of support seats (201) in sequence and is rotatably connected to the support seats (201) via a bearing.

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