Gas circuit connector for sampling in high-humidity environment

Abstract

The utility model discloses a gas circuit connector for sampling in a high-humidity environment, which comprises an upper connector and a lower connector, the center of the upper connector is provided with an upper axial channel, the upper connector is provided with an upward waterproof frustum, and the lower end face of the upper connector is provided with an annular mounting groove; the lower connector is provided with a lower axial channel, the upper end of the lower connector is provided with a convex extension ring, the convex extension ring and the annular mounting groove jointly define an annular dilution channel, the lower connector is provided with a dilution gas inlet channel and a dilution pipe threaded connector, and the annular dilution channel is communicated with the axial main gas path channel through the dilution gas inlet channel; the gas circuit connector comprises an upper connector and a lower connector, the upper connector is provided with an annular dilution channel, a dilution pipe threaded connector is communicated with the annular dilution channel, the peripheral contour of the upper connector is arranged to be a clamping portion, the lower connector is provided with a pipe section inserting hole, the pipe section inserting hole forms a part of a lower axial channel, and the gas circuit connector is used for butt joint connection between two pipe sections and meanwhile introduces dilution gas. And the sampling requirement in a high-humidity environment is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to particulate matter detection technical field especially, relates to a gas circuit connector for high humidity environment sampling. BACKGROUND

[0002] At present, sampling head assembly needs to be used to sample when particulate matter is detected, for example, the applicant previously applied for a kind of atmospheric sampling pipe assembly, and its authorized announcement number is CN 217111673 U, in the atmospheric sampling pipe assembly, air inlet pipe is connected with the outer pipe below by a gas circuit connector.But when sampling and detecting particulate matter concentration in some high humidity environment, high humidity gas directly enters into outer pipe from the air inlet passage between rain cover, and because the humidity of sampling gas is relatively large, thus easily adhering to the pipe wall of outer pipe, so that it will cause the inaccurate detection result of particulate matter, therefore, the atmospheric sampling pipe assembly previously applied by the applicant is not suitable for sampling in high humidity environment. SUMMARY

[0003] The utility model solves the technical problem that: provide a kind of gas circuit connector for high humidity environment sampling, the gas circuit connector is used to the butt joint connection between two pipe sections, also introduce dilution gas simultaneously, to meet the sampling requirement in high humidity environment.

[0004] To solve the above technical problem, the technical scheme of the utility model is: a kind of gas circuit connector for high humidity environment sampling, including mutually fixed upper connector and lower connector, the center of the upper connector is provided with upper and lower through upper axial passage, the middle part of the upper connector is provided with the waterproof cone frustum that is upwardly convex, and the lower end surface of the upper connector is provided with annular mounting groove;The lower connector is provided with lower axial passage that passes through up and down, and the upper axial passage and lower axial passage cooperate and form axial main gas circuit passage, the upper end of the lower connector is provided with the convex ring that is upwardly convex, the convex ring is inserted into the annular mounting groove and mutually sealed cooperation, the convex ring and annular mounting groove jointly enclose annular dilution passage, the lower connector is provided with dilution inlet passage and dilution pipe screw thread connection mouth, the dilution inlet passage is connected annular dilution passage with axial main gas circuit passage, the dilution pipe screw thread connection mouth is communicated with the annular dilution passage, the outer periphery profile of the upper connector is set into the clamping part of upper pipe section clamping, the lower connector is provided with pipe section insertion hole for facilitating installation with lower pipe, and the pipe section insertion hole forms part of lower axial passage.

[0005] As a preferred scheme, the upper connecting head bottom is provided with a central taper part extending downward, correspondingly, the upper end of the lower connecting head is provided with a central taper hole, the central taper part extends into the central taper hole, a taper gap is formed between the central taper part and the central taper hole, and the taper gap constitutes the dilution air passage.

[0006] As a preferred scheme, the upper connecting head and the lower connecting head are bolted, the clamping part is provided with a sealing ring mounting groove, and the inner wall of the pipe segment insertion hole of the lower connecting head is also provided with a sealing ring mounting groove.

[0007] As a preferred scheme, the upper axial passage is a taper passage, and the upper opening of the upper axial passage is smaller than the lower opening.

[0008] As a preferred scheme, the waterproof frustum is a circular frustum.

[0009] As a preferred scheme, the inner wall of the lower axial passage is provided with a positioning step above the pipe segment insertion hole for positioning cooperation with the end of the lower pipe segment.

[0010] The utility model discloses after the above technical scheme is sampled, the effect of the utility model is: because high humidity environment sampling air path connector, including each other's fixed upper connector and lower connector, the centre of upper connector is provided with upper axial passageway that penetrates up and down, the middle part of upper connector is provided with waterproof cone frustum that protrudes upwards, the lower end surface of upper connector is provided with annular mounting groove, be provided with lower axial passageway that penetrates up and down on lower connector, upper axial passageway and lower axial passageway cooperation constitutes axial main gas path passageway, the upper end of lower connector is provided with protruding ring that protrudes upwards, the protruding ring is inserted into annular mounting groove and mutually sealed cooperation, the protruding ring and annular mounting groove jointly enclose annular dilution passageway, be provided with dilution inlet channel and dilution pipe screw thread connection mouth on lower connector, dilution inlet channel communicates annular dilution passageway and axial main gas path passageway, dilution pipe screw thread connection mouth communicates with annular dilution passageway, the external profile of upper connector is set into with the clamping of upper pipe section Clamping portion, be provided with pipe section insertion hole that facilitates with the installation of lower pipeline on lower connector, pipe section insertion hole constitutes a part of lower axial passageway, therefore, when installing, clamping portion is inserted into the inner hole of upper pipe section and carries out sealed cooperation, and lower pipe section is directly inserted into pipe section insertion hole, thereby realizes the connection between upper pipe section and lower pipe section, and the air path connector adopts the design of split type, and upper connector and lower connector can better facilitate machining, and annular dilution passageway and dilution pipe screw thread connection mouth are also convenient to process, and because being provided with annular dilution passageway and dilution pipe screw thread connection mouth, the axial main gas path passageway of the air path connector is used for the flow of sampling gas, and dilution gas can enter from dilution pipe screw thread connection mouth, pass through annular dilution passageway and dilution inlet channel and communicate with axial main gas path passageway, so that the introduction of dilution gas can greatly reduce the humidity in the air, thereby avoiding that sampling gas adheres to the pipe wall, and also facilitating subsequent heating and drying, thereby reducing the error caused by humidity, and the introduction of waterproof cone frustum can further play the effect of waterproof.

[0011] And because the bottom of upper connector is provided with central taper portion, the central taper portion extends downward, correspondingly, the upper end of lower connector is provided with central taper hole, the central taper portion extends into the central taper hole, a taper gap is formed between the central taper portion and the central taper hole, and the taper gap constitutes a dilution inlet channel, so that the dilution inlet channel formed by the annular taper gap can make dilution gas enter the lower pipe section uniformly, and sampling gas entering from the axial main gas path passageway is in the middle part, and the dilution gas surrounds the sampling gas, thereby reducing the contact between the sampling gas and the pipe wall, so that the high-humidity dust-containing gas can be prevented from adhering to the pipe wall.

[0012] Since the upper axial channel is a taper channel, the size of the upper opening of the upper axial channel is smaller than that of the lower opening, so that the gas flow rate of the upper tube segment is relatively faster during suction sampling, so that the high humidity gas enters more quickly.

[0013] Since the inner wall of the lower axial channel is provided with a positioning step, the positioning step is located above the tube segment insertion hole for positioning cooperation with the end of the lower tube segment, so that the insertion cooperation of the lower tube segment is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described below in combination with the drawings and examples.

[0015] Figure 1 It is the perspective view of the utility model embodiment;

[0016] Figure 2 It is the perspective view of another angle of the utility model embodiment;

[0017] Figure 3 It is the front view of the utility model embodiment;

[0018] Figure 4 It is Figure 3 The structural section view along A-A;

[0019] Figure 5 It is the structural schematic diagram of the upper connector of the utility model embodiment;

[0020] Figure 6 It is the structural schematic diagram of the lower connector of the utility model embodiment;

[0021] In the drawings: 1. upper connector;2. lower connector;3. upper axial channel;4. lower axial channel;5. waterproof cone;6. convex ring;7. annular dilution channel;8. dilution inlet channel;9. dilution pipe threaded connection opening;10. positioning step;11. center cone;12. sealing ring mounting groove. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and examples.

[0023] As Figures 1-6As shown, a kind of gas circuit connector for high humidity environment sampling, including mutually fixed upper connector 1 and lower connector 2, the center of the upper connector 1 is provided with upper and lower through upper axial passage 3, the middle part of the upper connector 1 is provided with the waterproof cone frustum 5 that protrudes upwards, the lower end surface of the upper connector 1 is provided with annular mounting groove;The lower connector 2 is provided with lower axial passage 4 that passes through up and down, the upper axial passage 3 and lower axial passage 4 cooperate and constitute axial main gas circuit passage, the upper end of the lower connector 2 is provided with the protruding ring 6 that protrudes upwards, the protruding ring 6 is clamped into the annular mounting groove and mutually sealed fit, the protruding ring 6 and annular mounting groove jointly enclose annular dilution passage 7, the lower connector 2 is provided with dilution inlet passage 8 and dilution pipe threaded connection mouth 9, the dilution inlet passage 8 communicates annular dilution passage 7 and axial main gas circuit passage, the dilution pipe threaded connection mouth 9 is communicated with the annular dilution passage 7, the outer periphery profile of the upper connector 1 is set to be with the clamping part of upper pipe section clamping, the lower connector 2 is provided with pipe section insertion hole for facilitating with lower pipe installation, the pipe section insertion hole constitutes a part of lower axial passage 4.

[0024] In the embodiment, the inner wall of lower axial passage 4 is provided with positioning step 10, the positioning step 10 is located above pipe section insertion hole for positioning cooperation with the end of lower pipe section. The bottom of upper connector 1 is provided with central taper part 11, the central taper part 11 extends downwards, correspondingly, the upper end of the lower connector 2 is provided with central taper hole, the central taper part 11 extends into the central taper hole, the central taper part 11 and central taper hole form taper gap, the taper gap constitutes a circle of dilution inlet passage 8. Upper connector 1 and lower connector 2 are bolted, the clamping part is provided with sealing ring mounting groove 12, the inner wall of the pipe section insertion hole of the lower connector 2 is also provided with sealing ring mounting groove 12. Upper axial passage 3 is taper passage, the upper opening size of the upper axial passage 3 is less than the size of lower opening, and waterproof cone frustum 5 is conical frustum.

[0025] When installed, the clamping portion of the upper connector 1 is clamped into the inner hole of the upper pipe section, sealed and matched by the sealing ring, and the lower pipe section is directly inserted into the pipe section insertion hole of the lower connector 2 and positioned and matched with the positioning step 10, so as to realize the connection between the upper pipe section and the lower pipe section. Due to the arrangement of the annular dilution channel 7 and the dilution pipe threaded connection port 9, the axial main gas path channel of the gas circuit connector is used for the flow of the sampling gas, and the dilution gas can enter from the dilution pipe threaded connection port 9, pass through the annular dilution channel 7, the dilution inlet channel 8, and the axial main gas path channel, and the dilution inlet channel 8 formed by the tapered gap can make the dilution gas uniformly enter the lower pipe section, and the sampling gas entering from the axial main gas path channel is in the middle, and the dilution gas surrounds the sampling gas. The introduction of the dilution gas can greatly reduce the humidity in the air, avoid the adhesion of the sampling gas on the pipe wall, and facilitate subsequent heating and drying, thereby reducing the error caused by humidity, and the upper axial channel 3 is a tapered channel, and the size of the upper opening of the upper axial channel 3 is smaller than the size of the lower opening. Therefore, the gas flow rate of the upper pipe section is relatively faster during suction sampling, so that the high-humidity gas can enter more quickly.

[0026] The gas circuit system, servo motor, gear transmission mechanism, and screw nut mechanism mentioned in the embodiment are all conventional technologies. The specific structure and principle of the cylinder, motor, and other transmission mechanisms and other designs are disclosed in detail in the "Mechanical Design Manual, Fifth Edition" printed in Beijing in April 2008 for the 28th time, which belongs to the prior art and has a clear and clear structure. The vacuum element, gas circuit, and program control are disclosed in detail in the SMC training textbook of modern practical pneumatic technology, third edition, published by the Mechanical Industry Press on August 1, 2008, which shows that the gas circuit structure in the embodiment is also a prior art and is clear and clear. The control of the motor and the travel switch are also introduced in detail in the book "Motor Drive and Speed Regulation" published by the Chemical Industry Press on July 1, 2015. Therefore, the circuit and the gas circuit connection are clear.

[0027] The above-described embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements of the technical solutions of the present application can be made without departing from the design spirit of the present application, and all such modifications and improvements shall fall within the protection scope of the claims of the present application.

Claims

1. A gas line connector for high humidity environment sampling, characterized by: The upper and lower connecting heads are fixed to each other, the center of the upper connecting head is provided with an upper axial passage penetrating upward and downward, the middle of the upper connecting head is provided with a waterproof conical frustum protruding upward, the lower end surface of the upper connecting head is provided with an annular mounting groove, the lower connecting head is provided with a lower axial passage penetrating upward and downward, the upper axial passage and the lower axial passage cooperate to form an axial main gas passage, the upper end of the lower connecting head is provided with a protruding ring protruding upward, the protruding ring is clamped into the annular mounting groove and is in sealed cooperation with each other, the protruding ring and the annular mounting groove jointly enclose an annular dilution passage, the lower connecting head is provided with a dilution inlet passage and a dilution pipe threaded connection port, the dilution inlet passage communicates the annular dilution passage and the axial main gas passage, the dilution pipe threaded connection port communicates with the annular dilution passage, the outer periphery contour of the upper connecting head is provided as a clamping part for clamping an upper pipe segment, the lower connecting head is provided with a pipe segment insertion hole for facilitating installation of a lower pipe, and the pipe segment insertion hole forms part of the lower axial passage.

2. The gas line connector for high humidity environment sampling according to claim 1, characterized in that: The bottom of the upper connecting head is provided with a central taper part extending downward, correspondingly, the upper end of the lower connecting head is provided with a central taper hole, the central taper part extends into the central taper hole, a tapered gap is formed between the central taper part and the central taper hole, and the tapered gap forms the dilution inlet passage.

3. The gas line connector for high humidity environment sampling according to claim 2, characterized in that: The upper and lower connecting heads are bolted to each other, the clamping part is provided with a sealing ring mounting groove, and the inner wall of the pipe segment insertion hole of the lower connecting head is also provided with a sealing ring mounting groove.

4. The gas circuit connector for sampling in a high humidity environment according to any one of claims 1 to 3, characterized in that: The upper axial passage is a tapered passage, and the size of the upper opening of the upper axial passage is smaller than the size of the lower opening.

5. The gas line connector for high humidity environment sampling according to claim 4, characterized in that: The waterproof conical frustum is a conical frustum.

6. The gas line connector for high humidity environment sampling of claim 1, wherein: The inner wall of the lower axial passage is provided with a positioning step above the pipe segment insertion hole for positioning cooperation with the end of the lower pipe segment.

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