CN206945472U - A kind of gas minute-pressure difference generator - Google Patents
A kind of gas minute-pressure difference generator Download PDFInfo
- Publication number
- CN206945472U CN206945472U CN201720436062.6U CN201720436062U CN206945472U CN 206945472 U CN206945472 U CN 206945472U CN 201720436062 U CN201720436062 U CN 201720436062U CN 206945472 U CN206945472 U CN 206945472U
- Authority
- CN
- China
- Prior art keywords
- gas
- pressure difference
- pressure
- minute
- difference generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims 1
- 239000005439 thermosphere Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 86
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
技术领域technical field
本实用新型属于消防灭火器材技术领域，具体涉及一种气体微压差发生器。The utility model belongs to the technical field of fire-fighting equipment, in particular to a gas micro-pressure difference generator.
背景技术Background technique
气体灭火剂进行灭火过程中需要测得灭火剂浓度值，现有技术是采用气体采样方法进行，需要对采样气体进行过滤干燥处理后再对气体进行成分分析，测量精度较低，实时性较差，对一些有强气流流动的场合难于测量。The gas fire extinguishing agent needs to measure the concentration value of the fire extinguishing agent during the fire extinguishing process. The existing technology uses the gas sampling method, which needs to filter and dry the sampled gas and then analyze the gas composition. The measurement accuracy is low and the real-time performance is poor. , it is difficult to measure in some occasions with strong air flow.
实用新型内容Utility model content
本实用新型的目的在于：本发明采用热导系数较高的金属材料，使得整体传热快，易快速实现所需温度场，采用导热系数高的多孔中空的金属球构成气体恒温器，使得通过其中的气体温度很快达到整体发生器的温度，采用金属毛细管束构成的气体压差发生器以实现测量所需的层流流场，采用电加热和温度传感器采集温度的方法实现对整体发生器温度的有效控制，采用陶瓷纤维毯构成绝热层可以实现整体发生器温度恒定。这些技术的采用，实现了恒温层流流场环境，为应用泊肃叶定律获取流场中气体组份浓度成为可能。The purpose of this utility model is: the present invention adopts the metal material with higher thermal conductivity, so that the overall heat transfer is fast, and it is easy to quickly realize the required temperature field. The temperature of the gas in it quickly reaches the temperature of the overall generator. The gas pressure difference generator composed of metal capillary bundles is used to realize the laminar flow field required for measurement. For effective temperature control, the use of ceramic fiber blankets to form a thermal insulation layer can achieve a constant temperature of the overall generator. The adoption of these technologies has realized the constant temperature laminar flow field environment, and it is possible to obtain the concentration of gas components in the flow field by applying Poiseuille's law.
本实用新型采用的技术方案为：一种气体微压差发生器，该气体微压差发生器包括微压差发生器体，微压差发生器体是一柱状体，由材质热导系数较高的金属材料构成，微压差发生器体的中部设洞，洞的端口为用于安装电加热器的螺纹接口，微压差发生器体上设置U形气流孔，U形气流孔的一个端口为螺纹连接的进气口，进气口内设第一耐温气体过滤器，U 形气流孔的另一个端口为螺纹连接的出气口，U形气流孔的底部设第二耐温气体过滤器，U 形气流孔中的第二耐温气体过滤器到连接进气口的部分为气体恒温器，气体恒温器为导热系数高的多孔中空的金属球组成，U形气流孔中的第二耐温气体过滤器到连接出气口的部分为用金属毛细管束构成的气体压差发生器，气体压差发生器的两端设置有压力传感器和压力传感器；在微压差发生器体上设温度传感器，外部设绝热层，绝热层外部为保护外罩。The technical solution adopted by the utility model is: a gas micro-pressure difference generator, the gas micro-pressure difference generator includes a micro-pressure difference generator body, the micro-pressure difference generator body is a columnar body, and the thermal conductivity of the material is relatively high. Made of high-quality metal materials, a hole is set in the middle of the micro-pressure differential generator body, and the port of the hole is a threaded interface for installing an electric heater. A U-shaped airflow hole is set on the micro-pressure differential generator body, and one of the U-shaped airflow holes The port is a threaded air inlet, the air inlet is equipped with a first temperature-resistant gas filter, the other port of the U-shaped airflow hole is a threaded air outlet, and the bottom of the U-shaped airflow hole is equipped with a second temperature-resistant gas filter The part connecting the second temperature-resistant gas filter in the U-shaped airflow hole to the air inlet is the gas thermostat. The gas thermostat is composed of porous and hollow metal balls with high thermal conductivity. The second temperature-resistant gas filter in the U-shaped airflow hole The part connecting the temperature-resistant gas filter to the gas outlet is a gas pressure difference generator composed of metal capillary tube bundles. The two ends of the gas pressure difference generator are equipped with pressure sensors and pressure sensors; The sensor is provided with a heat insulating layer on the outside, and the outside of the heat insulating layer is a protective cover.
其使用时，电加热器接通电源，给微压差发生器体加温，温度传感器将监视温度到设定温度时，电加热器处于保温状态，使整个微压差发生器体处在设定的恒温状态；待测气体从进气口进入，经过滤器滤去灰尘后通过恒温器，从恒温器中输出的气体是和微压差发生器体具有同样恒定温度的气体，经过过滤器到达压差发生器的入口，气体经过压差发生器后从出气口排出，通过压力传感器和压力传感器获得气体经过压差发生器前后压力，经过适当的计算获得气体的压差，由泊肃叶定律模型算出气体的组份浓度值。When it is in use, the electric heater is powered on to heat the body of the micro-pressure difference generator. When the temperature sensor monitors the temperature to the set temperature, the electric heater is in a heat preservation state, so that the whole body of the micro-pressure difference generator is at the set temperature. Constant temperature state; the gas to be measured enters from the air inlet, passes through the thermostat after the dust is filtered out by the filter, and the gas output from the thermostat is the gas with the same constant temperature as the micro-pressure difference generator body, and arrives through the filter. The inlet of the pressure difference generator, the gas is discharged from the gas outlet after passing through the pressure difference generator, the pressure before and after the gas passes through the pressure difference generator is obtained through the pressure sensor and the pressure sensor, and the pressure difference of the gas is obtained through proper calculation, according to Poiseuille's law The model calculates the component concentration values of the gas.
本实用新型的原理在于：Principle of the present utility model is:
根据泊肃叶定律：粘度为μ的流体，流经半径为R、长度为L的毛细管，设流经毛细管后两端的压降为Δp，流量为Q。在流型为层流的情况下，依泊肃叶定律，有以下关系：According to Poiseuille's law: a fluid with a viscosity of μ flows through a capillary with a radius of R and a length of L, and the pressure drop at both ends of the capillary after flowing through the capillary is Δp, and the flow rate is Q. In the case of laminar flow, Epoise's law has the following relationship:
即，在其他条件不变的情况下，毛细管两端的压降Δp，只是流体粘度μ的函数。不同类型流体的粘度不同，毛细管两端的压降必不相同。并且，可以用压降这一参数，定量表征不同流体的粘度大小。由(1)式可得：That is, under the condition that other conditions remain unchanged, the pressure drop Δp at both ends of the capillary is only a function of fluid viscosity μ. Different types of fluids have different viscosities, and the pressure drop across the capillary must be different. Moreover, the parameter of pressure drop can be used to quantitatively characterize the viscosity of different fluids. From formula (1), we can get:
μ＝kΔp (2)μ=kΔp (2)
其中，k是仪器参数，由实际使用的测量装置本身决定。Among them, k is an instrument parameter, which is determined by the actual measuring device itself.
低压混合物的粘度可利用下面的经验公式进行计算：The viscosity of a low pressure mixture can be calculated using the following empirical formula:
式中，μmix为混合气体的粘度；yj为混合气体中i组分的摩尔分数；μi为混合气体中i组分的粘度；Mi为混合气体中i组分的分子量。In the formula, μ mix is the viscosity of the mixed gas; y j is the mole fraction of the i component in the mixed gas; μ i is the viscosity of the i component in the mixed gas; M i is the molecular weight of the i component in the mixed gas.
居于以上理论，本实用新型提出一种气体微压差发生器。当采样气体通过该装置时，可产生气体微压差。Based on the above theory, the utility model proposes a gas micro-pressure difference generator. When the sampled gas passes through the device, a slight gas pressure difference can be generated.
本实用新型与现有技术相比的优点在于：Compared with the prior art, the utility model has the following advantages:
(1)气体微压差发生器是一种获取气体流动压差的测量装置，能适用于包括单双组分的多数气体浓度测量。(1) The gas differential pressure generator is a measuring device for obtaining gas flow pressure difference, which can be applied to the concentration measurement of most gases including single and double components.
(2)本气体微压差发生器采用恒温技术和毛细管束技术，在气体流动处于恒温环境和层流的过程中，所获取的气体流动压差数据符合泊肃叶定律的要求，从而可以用来测试气体的浓度数据。本气体微压差发生器为流动气体浓度的测试提供了一种方法，特别是为流动场所气体灭火剂浓度的测量提供了一个有效可行的解决方案。(2) The gas micro-pressure difference generator adopts constant temperature technology and capillary bundle technology. When the gas flow is in a constant temperature environment and in the process of laminar flow, the obtained gas flow pressure difference data meets the requirements of Poiseuille's law, so it can be used To test the gas concentration data. The gas micro-pressure difference generator provides a method for testing the concentration of flowing gas, especially provides an effective and feasible solution for measuring the concentration of gas fire extinguishing agent in a flowing place.
(3)本气体微压差发生器采用导热系数高的多孔中空的金属球构成气体恒温器，使得通过其中的气体温度很快达到整体发生器的温度，采用电加热和温度传感器采集和控制温度的方法实现对整体发生器温度的有效控制，采用陶瓷纤维毯构成绝热层可以实现整体发生器温度恒定，这些技术的采用，实现了恒温层流流场环境。(3) The gas micro-pressure difference generator uses porous hollow metal balls with high thermal conductivity to form a gas thermostat, so that the temperature of the gas passing through it can quickly reach the temperature of the overall generator, and electric heating and temperature sensors are used to collect and control the temperature The method realizes the effective control of the overall generator temperature, and the use of ceramic fiber blankets to form the thermal insulation layer can realize the constant temperature of the overall generator. The adoption of these technologies realizes the constant temperature laminar flow field environment.
附图说明Description of drawings
图1为本实用新型一种气体微压差发生器视图；Fig. 1 is the view of a kind of gas micro-pressure difference generator of the utility model;
图2为加保温层气体微压差发生器示意图；Fig. 2 is the schematic diagram of gas micro-pressure difference generator with insulation layer;
图3为单通道气体微压差发生器右侧视图；Fig. 3 is the right side view of the single-channel gas micro-pressure difference generator;
图4为两通道气体微压差发生器右侧视图。Fig. 4 is the right side view of the two-channel gas micro-pressure difference generator.
图中附图标记含义为：1为气体微压差发生器体，2为U形气流孔，3为洞，4为电加热器，5为气体恒温器，6为绝热层，7为外罩，8为进气口，9为出气口，10为M14螺纹孔接口，11为气体压力传感器，12为压力传感器，13为温度传感器，14为第一耐温气体过滤器，15为气体压差发生器，16为第一耐温气体过滤器，17为进气口17，18为排气口。The meanings of the reference signs in the figure are: 1 is the gas micro-pressure difference generator body, 2 is the U-shaped airflow hole, 3 is the hole, 4 is the electric heater, 5 is the gas thermostat, 6 is the heat insulation layer, 7 is the outer cover, 8 is the air inlet, 9 is the gas outlet, 10 is the M14 threaded hole interface, 11 is the gas pressure sensor, 12 is the pressure sensor, 13 is the temperature sensor, 14 is the first temperature-resistant gas filter, 15 is the gas pressure difference generation device, 16 is the first temperature-resistant gas filter, 17 is the air inlet 17, and 18 is the exhaust port.
具体实施方式detailed description
以下结合附图具体说明本实用新型的实施例。Embodiments of the utility model are described in detail below in conjunction with the accompanying drawings.
实施例1：Example 1:
如图1、图2和图3所示，本实用新型一种气体微压差发生器，气体微压差发生器体1是一铜材质的柱状体，其长度为300mm，高度为100mm，宽度为60mm，气体微压差发生器体1的中部设直径40mm，深220mm的洞3，洞3的端口为M14内螺纹孔接口10，用于安装M14外螺纹电加热器4，气体微压差发生器体1上设置直径为15mm，深220mm的U 形气流孔2，U形气流孔2直径为15mm，底部长为60mm，U形气流孔2的一个为M10的内螺纹连接进气口8，进气口8内设长10mm直径15mm的第一耐温气体过滤器14，U形气流孔2的另一个端口为M10的螺纹孔出气口9，外接抽气泵的进气管，U形气流孔2的底部设长为60mm，直径为15mm第二耐温气体过滤器16，U形气流孔2中的第二耐温气体过滤器16到连接进气口8的部分为气体恒温器5，气体恒温器5为直径8mm多孔中空的铜质金属球组成，将直径2.5mm×壁厚0.3mm的304不锈钢毛细管用耐温胶粘连成束，安装在U形气流孔2中的第二耐温气体过滤器16到连接的出气口9之间作为气体压差发生器15，在气体压差发生器15两端安装型号为HPX005GD气体压力传感器11和压力传感器12；气体微压差发生器体1上设温度传感器13为K型M3贴片热电偶，热电偶输出链接到型号为WHD 的温度控制器控制电加热器的温度，外部的绝热层6采用的是3mm厚耐温的陶瓷纤维毯构成并密封，绝热层6外部的外罩7由1mm厚的不锈钢板制作而成。这样就做成了一路微压差气体浓度测量器。As shown in Fig. 1, Fig. 2 and Fig. 3, a kind of gas micro-pressure difference generator of the present utility model, gas micro-pressure difference generator body 1 is a columnar body of copper material, and its length is 300mm, height is 100mm, width The diameter is 60mm, and the middle part of the gas micro-pressure difference generator body 1 is provided with a hole 3 with a diameter of 40mm and a depth of 220mm. A U-shaped airflow hole 2 with a diameter of 15mm and a depth of 220mm is set on the generator body 1. The diameter of the U-shaped airflow hole 2 is 15mm, and the length of the bottom is 60mm. One of the U-shaped airflow holes 2 is connected to the air inlet 8 with an M10 internal thread , the air inlet 8 is provided with a first temperature-resistant gas filter 14 with a length of 10mm and a diameter of 15mm, the other port of the U-shaped airflow hole 2 is an M10 threaded hole air outlet 9, and the air intake pipe of the external air pump is connected to the U-shaped airflow hole The bottom of 2 is set to be 60mm long, and the diameter is the second temperature-resistant gas filter 16 of 15mm, and the second temperature-resistant gas filter 16 in the U-shaped airflow hole 2 is a gas thermostat 5 to the part connected to the air inlet 8, and the gas The thermostat 5 is composed of porous and hollow copper metal balls with a diameter of 8 mm. The 304 stainless steel capillary tubes with a diameter of 2.5 mm and a wall thickness of 0.3 mm are bonded into bundles with heat-resistant glue, and installed in the second temperature-resistant tube in the U-shaped airflow hole 2. Gas filter 16 is used as gas pressure difference generator 15 between gas filter 16 and connected gas outlet 9, and model is HPX005GD gas pressure sensor 11 and pressure sensor 12 are installed at gas pressure difference generator 15 two ends; Gas micro pressure difference generator body 1 The upper temperature sensor 13 is a K-type M3 patch thermocouple, and the output of the thermocouple is connected to the temperature controller of the model WHD to control the temperature of the electric heater. The outer heat insulation layer 6 is made of a 3mm thick and temperature-resistant ceramic fiber blanket. And sealed, the outer cover 7 of the heat insulating layer 6 is made of 1mm thick stainless steel plate. In this way, a micro-pressure difference gas concentration measuring device is made.
装配时各部件连接处用密封胶涂抹，以防泄漏。用一卡箍将该气体微压差发生器固定在测试箱的底板上。When assembling, apply sealant to the joints of each component to prevent leakage. Fix the gas micro-pressure differential generator on the bottom plate of the test box with a clamp.
使用时将具有外螺纹M10的进气管与内螺纹孔进气口8固定连接，将接抽气泵的外螺纹 M10进气管与内螺纹孔出气口9固定连接，开启抽气泵时就可以将待测试气体从孔进气口8进入气体微压差发生器中，从出气口9经抽气泵排出；待测试气体进入微压差发生器中，经过虑和恒温后通过毛细管束时，微压力传感器测得毛细管束两端的压力并传输给后续记录分析处理得到气体成分的浓度值测量。When in use, the air intake pipe with external thread M10 is fixedly connected to the air inlet 8 of the internal thread hole, and the external thread M10 air intake pipe connected to the air pump is fixedly connected to the air outlet 9 of the internal thread hole. When the air pump is turned on, the to-be-tested The gas enters the gas micro-pressure difference generator from the hole inlet 8, and is discharged from the gas outlet 9 through the air pump; the gas to be tested enters the micro-pressure difference generator, and when it passes through the capillary bundle after filtration and constant temperature, the micro pressure sensor measures The pressure at both ends of the capillary bundle is obtained and transmitted to subsequent recording and analysis processing to obtain the measurement of the concentration value of the gas component.
该气体微压差发生器可用于CO，CO2，N2，灭火剂1301，1211等气体的浓度值。The gas micro-pressure difference generator can be used for CO, CO 2 , N 2 , fire extinguishing agent 1301, 1211 and other gas concentration values.
实施例2：Example 2:
本实施例2是在实施例1的基础上，增加了一路微压差气体浓度测量。气体微压差发生器体1仍是一铜质材料的柱状体，其长度为300mm，高度为100mm，宽动为100mm。This embodiment 2 is based on the embodiment 1, adding a path of micro-pressure difference gas concentration measurement. The gas micro-pressure difference generator body 1 is still a columnar body of copper material, with a length of 300mm, a height of 100mm, and a width of 100mm.
如图1、图2和图4所示，发生器体1的中部设直径40mm，深200mm的洞3，洞3的端口为M14螺纹孔接口10，用于安装电加热器4的，发生器体1上设置并排设置两个直径为15mm，深22cm的环形孔，分别有进气口8和进气口17，排气口9和排气口18。如图3 所示，进气口8和排气口9构成的的U形气流孔，进气口17和进排口18构成的的U形气流孔，两个并排的U形气流孔结构及布置相同，将两个U形气流孔的排气口连通后接入抽气泵的进气口，两U形气流孔的进气口分别接两路入气口，这样就构成了一个两路通道的微压差气体浓度测量器。As shown in Figure 1, Figure 2 and Figure 4, a hole 3 with a diameter of 40mm and a depth of 200mm is provided in the middle of the generator body 1, and the port of the hole 3 is an M14 threaded hole interface 10, which is used to install the electric heater 4, the generator The body 1 is provided with two annular holes with a diameter of 15mm and a depth of 22cm arranged side by side, respectively having an air inlet 8 and an air inlet 17, an air outlet 9 and an air outlet 18. As shown in Figure 3, the U-shaped airflow hole formed by the air inlet 8 and the exhaust port 9, the U-shaped airflow hole formed by the air inlet 17 and the inlet and outlet 18, two U-shaped airflow hole structures arranged side by side and The layout is the same, the exhaust ports of the two U-shaped air holes are connected to the air inlet of the air pump, and the air inlets of the two U-shaped air holes are respectively connected to two air inlets, thus forming a two-way channel Micro pressure difference gas concentration measuring instrument.
Claims (2)
- A kind of 1. gas minute-pressure difference generator, it is characterised in that：The gas minute-pressure difference generator includes minute-pressure difference generator body (1), minute-pressure difference generator body (1) is a column, is made up of the higher metal material of material thermal conductivity coefficient, minute-pressure difference generator Hole (3) is set in the middle part of body (1), the port of hole (3) is the hickey (10) for installing electric heater (4), and micro-pressure-difference occurs U-shaped airflow hole (2) is set on body (1), and a port of U-shaped airflow hole (2) is the air inlet (8) of threaded connection, air inlet (8) the first heatproof pneumatic filter (14) is set in, another port of U-shaped airflow hole (2) is the gas outlet (9) of threaded connection, U The bottom of shape airflow hole (2) sets the second heatproof pneumatic filter (14), the second heatproof pneumatic filter in U-shaped airflow hole (2) (16) it is gas thermostatic device (5) to the part of connection air inlet (8), gas thermostatic device (5) is the high Porous hollow of thermal conductivity factor Metal ball composition, the second heatproof pneumatic filter (16) in U-shaped airflow hole (2) is to the part of connection gas outlet (9) to use The gas differential pressure generator (15) that metal capillary beam is formed, gas differential pressure generator (15) are provided at both ends with pressure sensor And pressure sensor (12) (11)；Temperature sensor (13) is set on minute-pressure difference generator body (1), outside sets heat insulation layer (6), absolutely It is outside protective covers (7) that thermosphere (6) is outside.
- A kind of 2. gas minute-pressure difference generator according to claim 1, it is characterised in that：In use, electric heater (4) connects Energization source, heated to minute-pressure difference generator body (1), when temperature sensor (13) will monitor temperature to design temperature, electric heater (4) keeping warm mode is in, whole minute-pressure difference generator body (1) is in the temperature constant state of setting；Under test gas is from air inlet (8) Into by thermostat (5) after filter (14) filters off dust, the gas of output is sent out with micro-pressure-difference from thermostat (5) Raw body (1) has the gas of same steady temperature, and the entrance of differential pressure generator (15), gas warp are reached by filter (16) Discharged after over-pressed difference generator (15) from gas outlet (9), gas is obtained by pressure sensor (11) and pressure sensor (12) By pressure before and after differential pressure generator (15), the pressure difference of gas is obtained by appropriate calculating, is calculated by Poiseuille's law model The constituents ratio value of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436062.6U CN206945472U (en) | 2017-04-24 | 2017-04-24 | A kind of gas minute-pressure difference generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436062.6U CN206945472U (en) | 2017-04-24 | 2017-04-24 | A kind of gas minute-pressure difference generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945472U true CN206945472U (en) | 2018-01-30 |
Family
ID=61358698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720436062.6U Withdrawn - After Issue CN206945472U (en) | 2017-04-24 | 2017-04-24 | A kind of gas minute-pressure difference generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206945472U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121355A (en) * | 2017-04-24 | 2017-09-01 | 中国科学技术大学 | A kind of gas minute-pressure difference generator |
-
2017
- 2017-04-24 CN CN201720436062.6U patent/CN206945472U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121355A (en) * | 2017-04-24 | 2017-09-01 | 中国科学技术大学 | A kind of gas minute-pressure difference generator |
| CN107121355B (en) * | 2017-04-24 | 2023-04-25 | 中国科学技术大学 | A gas differential pressure generator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2426106C1 (en) | Method of determining heat conductivity of thin-wall heat shield and device to this end | |
| CN205103224U (en) | Oil bath formula coal low -temperature oxidation test system | |
| CN104764769A (en) | Multichannel parallel heat release rate test system and test method | |
| US10345130B2 (en) | Airflow sensor with thermal conductivity and diffusivity sensing | |
| CN104034753A (en) | Method for detecting heat dissipating property of metal heat dissipation device and testing device thereof | |
| KR20180106830A (en) | Experimental apparatus and experimental method for measuring indoor and outdoor penetration coefficient of airborne | |
| CN103163046B (en) | Gaseous extinguishing agent concentration measure apparatus | |
| CN103389320B (en) | A kind of measurement mechanism with the radial Equivalent Thermal Conductivities of roll of material and measuring method | |
| CN105158115A (en) | Transient measurement apparatus for convective heat transfer and pressure drop in porous material | |
| US10544723B2 (en) | Exhaust gas analysis apparatus and exhaust gas analysis method | |
| CN206945472U (en) | A kind of gas minute-pressure difference generator | |
| CN103543121A (en) | Device and method for on-line calibration on high-temperature flue gas infrared spectrum measurement system | |
| CN111189959A (en) | Comprehensive experimental platform for testing powder pyrolysis and combustion characteristics and their fire spread characteristics | |
| CN102735708B (en) | Determination system and method for heat exchange coefficient of cooper pipe | |
| CN104749214B (en) | A kind of constant temperature hot bath device that liquid thermal conductivity factor is measured based on Adsorbent By Using Transient Plane Source Technique | |
| CN107121355B (en) | A gas differential pressure generator | |
| CN113607295B (en) | Low-temperature air temperature and humidity measurement and calculation method | |
| CN102590274B (en) | System and method used for testing heat conductivity of thin film thermoelectric material | |
| CN110736523A (en) | High-low temperature performance test testing device for membrane type gas meter | |
| CN109459337A (en) | VOCs ingredient on-line analysis and equipment in Atmospheric particulates | |
| CN205352772U (en) | High temperature coal gas's dust sampling device | |
| CN107976381A (en) | A kind of non-selective fire gases detection device based on viscometric properties | |
| CN105973503A (en) | Composite sampling tube for acquiring gas and measuring temperature for microwave heating device | |
| CN204556552U (en) | A kind of multi-channel parallel heat release rate testing system | |
| CN113587976B (en) | Wide temperature range air temperature humidity sampling measurement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230425 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230425 |