Path guiding device

Abstract

The utility model provides a path guiding device, which is used as a quick connecting device for an inner gas path and an outer gas path of a test pipeline and comprises a cylindrical guiding device body, the guiding device body is provided with axial hole channels which are annularly and uniformly distributed, the axial hole channels are through holes, and two ends of each axial hole channel are connected with a sampling pipeline through pipe joints; the axial hole channels which are annularly distributed are arranged on one or more circumferences, and the axial hole channels on each circumference are correspondingly distributed along the radial direction of the guider body; a through central hole channel is formed in the central axis position of the guider body; the guide device body is further provided with at least one radial hole channel perpendicularly communicated with the center hole channel, the outer ends of the radial hole channels are closed, each axial hole channel is selectively communicated with one radial hole channel, and therefore the structural form that the axial hole channels are communicated with the center hole channel through the radial hole channels is formed.

Description

Technical Field

[0001] The utility model relates to a path guide, which is used as a gas path connecting device inside and outside a test channel, and can be applied in wind tunnel testing and the like. Background Art

[0002] At present, in the sampling system, the mechanical scanning valve is used as a gas path guiding device in wind tunnel testing and other aspects. The mechanical scanning valve is equipped with a quick connection device for the gas path inside and outside the channel. The sample to be tested is connected to the inlet interface on the scanning valve through a hose to form a detection gas path, with multiple inlets and one outlet. The outlet interface on the scanning valve is also connected to the detection unit through a hose. The mechanical scanning valve is controlled to connect with each gas path to form a sample path, and the sample is sent to the detection unit through the scanning valve for chromatographic detection.

[0003] The shortcomings of the existing mechanical scanning valve are as follows:

[0004] Mechanical scanning valves are expensive and mostly imported, which increases costs;

[0005] The connecting pipeline between the sample to be tested and the mechanical scanning valve is not convenient to clean, and there is a cleaning dead zone; there will be residual sample in the connecting pipeline between the mechanical scanning valve and the detection unit, and there is also a cleaning dead zone; the residual sample in the cleaning dead zone will affect the test of the next group of samples, causing detection errors. Summary of the invention

[0006] The utility model aims at solving the problems existing in the prior art and provides a path guide.

[0007] The specific technical solution of the utility model is as follows:

[0008] A path guide, connected in a test pipeline, comprises a cylindrical guide body,

[0009] The introducer body has axial channels evenly distributed in an annular shape, the axial channels are through holes, and both ends of each axial channel are connected to a sampling pipeline via a pipe joint; the annularly distributed axial channels are arranged on one or more circumferences, and the axial channels on each circumference are correspondingly distributed along the radial direction of the introducer body;

[0010] The central axis of the introducer body has a central channel extending therethrough;

[0011] The guide body also has at least one radial channel that is perpendicular to the central channel. The outer end of the radial channel is closed, and each axial channel is selectively connected to a radial channel, thereby forming a structural form in which each axial channel is connected to the central channel via the radial channel.

[0012] Furthermore, the radial channels are provided in multiple numbers and arranged in layers, each layer is arranged with two radial channels that cross each other, and the radial channels between layers are arranged in a staggered manner;

[0013] Furthermore, there are 8 radial channels, which are arranged in 4 layers and staggered at an angle of 22.5 degrees layer by layer.

[0014] Furthermore, the axial channels are arranged in layers on two circles, with 16 channels arranged on each circle, forming a total of 32 axial channels, connecting 32 sampling pipelines.

[0015] Furthermore, the axial channels are arranged in layers on three circles, with 16 channels arranged on each circle, forming a total of 48 axial channels, connecting 48 sampling pipelines.

[0016] Furthermore, the axial channels are arranged in layers on four circles, with 16 channels arranged on each circle, forming a total of 64 axial channels, connecting 64 sampling pipelines.

[0017] Furthermore, the central channel is also connected to a pressure relief hole, and the pressure relief hole is connected to a pressure relief valve;

[0018] Furthermore, conversion columns are respectively provided at the middle positions on both sides of the guide body, and the conversion columns are provided with extension sections of the central channel and L-shaped pressure relief holes. The extension section of the central channel is connected to the central channel, one end of the pressure relief hole is connected to the central channel, and the other end leads out of the guide body.

[0019] Furthermore, the conversion column, the pipe joint and the introducer body are connected by gluing.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The path guide of the utility model can connect multiple sampling channels as well as a single sample delivery channel, is easy to use, can realize simultaneous connection of multiple channels as well as connection of a single channel, and is ingeniously designed.

[0022] The path guide is easy to clean and can replace the mechanical scanning valve in the wind tunnel test sampling system. It is used in the sampling pipeline of the wind tunnel test sampling system to overcome the existing cleaning dead zone and reduce the test error.

[0023] The path guide can be used in conjunction with a cleaning syringe to clean the connecting hose between the path guide and the detection unit with pure air, so that the tail sample is completely delivered to the detection unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of a path guide;

[0025] Figure 2 for Figure 1 Side view of

[0026] Figure 3 The structure of the path guide is shown in FIG.

[0027] Figure 4 for Figure 3 Bottom view of

[0028] Figure 5 for Figure 3 The local enlarged view of point I in the middle;

[0029] Figure 6 For the corresponding Figure 3 Cross-sectional views of layers a, b, c, and d;

[0030] Figure 7 for Figure 6 AA section view of the middle a layer;

[0031] Figure 8 for Figure 6 BB section view of the middle b layer;

[0032] Fig. 9 for Figure 6 CC section view of the middle c layer;

[0033] Fig.10 for Figure 6 DD section view of the middle d layer;

[0034] Fig.11 This is an example diagram of the application of the path guide in the gas synchronization acquisition system;

[0035] In the figure: 801-introducer body; 802-conversion column; 803-axial channel; 804-center channel; 805-radial channel; 806-pressure relief hole; 807-extension section; C6-pipe joint;

[0036] Fig.11 Among them, 2-sample delivery cylinder; 4-cleaning cylinder; 5-cleaning syringe; 6-sampling syringe; 7-sampling pipeline; 8-path guide; 9-multi-way same-speed switching valve; 10-sample delivery pipeline; 11-chromatographic analysis unit; 12-damping section; 13-vacuum pump unit; 14-indicates the rotation of the moving valve core; 28-air pressure reducing bottle; 29-flow meter; 30-bypass two-position valve; D1-check valve; D2-check valve; D3-check valve. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Embodiment 1:

[0038] like Figure 1 , Figure 3 , Figure 4 As shown, the path guide of the utility model is connected in a test pipeline, such as a sampling pipeline or other test pipelines, and can be applied in the sampling pipeline of a wind tunnel test sampling system.

[0039] The path guide includes a cylindrical guide body 801, which has an axial channel 803 evenly distributed in an annular shape. The axial channel 803 is a through hole, and both ends of each axial channel are connected to a sampling pipeline through a pipe joint C6; the annularly distributed axial channels 803 are arranged on one or more circumferences, and the axial channels on each circumference are correspondingly distributed along the radial direction of the guide body.

[0040] A through central channel 804 is provided at the central axis of the introducer body; both ends of the central channel are connected to the cleaning syringe assembly and the chromatographic analysis unit via pipe connectors C6.

[0041] The guide body 801 also has at least one radial channel 805 that passes through the central channel vertically. The outer end of the radial channel 805 is closed and the inside is conductive. Each axial channel 803 is selectively connected to a radial channel 805, thereby forming a structural form in which each axial channel is connected to the central channel via a radial channel.

[0042] When in use, the path guide is connected to the sampling pipeline, and a one-way valve is installed on each upstream path of the path guide. When sampling, the airflow direction is set to the forward direction, and the sample passes through the path guide, using a multi-way in and multi-way out method to achieve multi-way simultaneous sampling. When delivering the sample, the gas sample is reversed and the single path enters the path guide and enters the analysis unit in sequence, completing the multi-way sample delivery in sequence. Embodiment 2:

[0043] A further optional design of this example is that Figure 2-Figure 10 As shown, a plurality of radial channels 805 are provided and arranged in layers, and each layer is arranged with two radial channels that cross each other, and the radial channels 805 between the layers are arranged in a staggered manner;

[0044] There are 8 radial channels 805, which are arranged in 4 layers and staggered at 22.5 degrees. There are four layers, a, b, c, and d, and each layer is arranged at intervals. Figure 6 For the corresponding Figure 3 Cross-sectional views of layers a, b, c, and d; Figure 7 for Figure 6 AA section view of the middle a layer; Figure 8 for Figure 6 BB section view of the middle b layer; Fig. 9 for Figure 6 CC section view of the middle c layer; Fig.10 for Figure 6 DD cross-section view of the middle d layer. Embodiment 3:

[0045] A further optional design of this example is that the axial channels are arranged in layers on two circles, with 16 channels arranged on each circle, forming a total of 32 axial channels, connecting 32 sampling pipelines. Embodiment 4:

[0046] A further optional design of this example is that Figure 2-Figure 10 As shown, the axial channels 803 are arranged in layers on three circles, with 16 channels arranged on each circle, forming a total of 48 axial channels, which can be connected to 48 sampling pipelines. Figure 6 For the corresponding Figure 3 Cross-sectional views of layers a, b, c, and d. Embodiment 5:

[0047] A further optional design of this example is that the axial channels are arranged in layers on four circles, with 16 channels arranged on each circle, forming a total of 64 axial channels, connecting 64 sampling pipelines. Embodiment 6:

[0048] A further optional design of this example is that Figure 1 As shown, the central channel is also connected to a pressure relief hole 806, and the pressure relief hole 806 is connected to a pressure relief valve;

[0049] Conversion posts 802 are provided at the middle positions on both sides of the guide body, and extension sections 807 of the central channel and L-shaped pressure relief holes 806 are provided on the conversion posts 802. The extension sections 807 of the central channel are connected to the central channel 804, and one end of the pressure relief hole 806 is connected to the central channel 804, and the other end leads out of the guide body 801.

[0050] The conversion column 802, the pipe joint C6 and the introducer body 801 are connected by gluing.

[0051] Application examples:

[0052] like Fig.11 As shown, the path guide of the utility model is applied in the gas synchronous collection system. The gas synchronous collection system includes a support frame, a sampling unit, a sample supply unit, a vacuum pump unit 13, a cleaning syringe assembly, a chromatographic analysis unit 11, a sampling pipeline 7 and a sample delivery pipeline 10. The sample supply unit is connected to the vacuum pump unit 13 through a plurality of sampling pipelines.

[0053] The sampling unit includes a plurality of sampling syringes 6, each of which includes a syringe and a plunger, and each syringe is arranged side by side on a support frame; the lower end of each syringe is connected to a sampling pipeline 7, each sampling pipeline 7 is connected to a sample delivery pipeline 10, and is connected to a chromatographic analysis unit 11 through the sample delivery pipeline 10; the sampling unit also includes a sampler lifting assembly and a sample delivery cylinder 2, the sampler lifting assembly is used to drive the plunger to rise and fall, so as to realize the cleaning of the sampling syringe and the collection of samples; the sample delivery cylinder 2 is used to press the plunger downward to press the sample in the syringe into the chromatographic analysis unit;

[0054] A vacuum pump unit 13, used to provide power for the sampling pipeline;

[0055] A cleaning syringe assembly is connected to the path guide via a pipeline and is used for cleaning the sampling pipeline;

[0056] The sampling pipeline 7 is provided with a path guide of the utility model, which is connected in the sampling pipeline and respectively connected to the cleaning syringe assembly and the chromatographic analysis unit; it is used to control the simultaneous conduction of multiple sampling pipelines and the single conduction of one sampling syringe and the sample delivery pipeline, so as to realize multi-channel simultaneous sampling and single-channel sample delivery.

[0057] The multi-way same-speed switch valve 9 is connected to the rear end of the sampling pipeline and is used to convert the connected multi-way sampling pipeline into an output pipeline connected to the vacuum pump unit 13. A damping section 12 for rectifying the flow is also provided, which is arranged between the output pipeline of the multi-way same-speed switch valve 9 and the vacuum pump unit. The output end of the multi-way same-speed switch valve 9 is connected to the vacuum pump unit 13 through the damping section 12 and the bypass two-position valve 30. 14 represents the rotation of the moving valve core, and the multi-way same-speed switch valve is switched on and off by the rotation of the moving valve core.

[0058] The working process of the path guide of the utility model in the gas synchronous collection system is as follows:

[0059] During normal sampling, the sample passes through the front sampling pipeline, the axial channel 803 of the path guide 8, and the rear sampling pipeline, and the sampling pipeline is connected and unobstructed;

[0060] During the pressure measurement, under the pressure of the sampling syringe plunger, a sample runs in the reverse direction, enters the central hole 804 through the radial hole 805 of the path guide connected to it, enters the sample delivery pipeline 10 through the central hole 804, and then enters the chromatographic analysis unit 11; the cleaning component will press pure air into the upstream interface of the path guide, and the pure air will follow the sample gas into the chromatograph to complete the tail sample delivery and sampling pipeline cleaning; the samples are delivered one by one in this way until the last sample gas is delivered.

Claims

1. A path guide connected in a test pipeline, characterized in that: comprising a cylindrical introducer body, The introducer body has axial channels evenly distributed in an annular shape, the axial channels are through holes, and both ends of each axial channel are connected to a sampling pipeline via a pipe joint; the annularly distributed axial channels are arranged on one or more circumferences, and the axial channels on each circumference are correspondingly distributed along the radial direction of the introducer body; The central axis of the introducer body has a central channel extending therethrough; The guide body also has at least one radial channel that is perpendicular to the central channel. The outer end of the radial channel is closed, and each axial channel is selectively connected to a radial channel, thereby forming a structural form in which each axial channel is connected to the central channel via the radial channel.

2. The path guide according to claim 1, characterized in that: The radial channels are provided in plurality and arranged in layers, each layer is arranged with two radial channels in a cross shape, and the radial channels between layers are arranged in a staggered manner.

3. The path guide according to claim 2, characterized in that: There are 8 radial channels, which are arranged in 4 layers and staggered at an angle of 22.5 degrees.

4. The path guide according to claim 2, characterized in that: The axial channels are arranged in layers on two circles, with 16 channels arranged on each circle, forming 32 axial channels in total, and connecting 32 sampling pipelines.

5. The path guide according to claim 3, characterized in that: The axial channels are arranged in layers on three circles, with 16 channels arranged on each circle, forming a total of 48 axial channels, which are connected to 48 sampling pipelines.

6. The path guide according to claim 2, characterized in that: The axial channels are arranged in layers on four circles, with 16 channels arranged on each circle, forming a total of 64 axial channels, which are connected to 64 sampling pipelines.

7. The path guide according to any one of claims 1 to 6, characterized in that: The central channel is also connected with a pressure relief hole, and the pressure relief hole is connected to a pressure relief valve.

8. The path guide according to claim 7, characterized in that: Conversion connecting columns are respectively provided at the middle positions on both sides of the guide body, and an extension section of the central channel and an L-shaped pressure relief hole are provided on the conversion connecting columns. The extension section of the central channel is connected to the central channel, one end of the pressure relief hole is connected to the central channel, and the other end leads out of the guide body.

9. The path guide according to claim 8, characterized in that: The conversion column, the pipe joint and the introducer body are connected by gluing.

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