Dust sampling head switching mechanism

Abstract

The utility model discloses a dust sampling head switching mechanism, which relates to the technical field of dust samplers and comprises a connecting mechanism, a sampler body is fixedly connected to the side surface of the connecting mechanism, and a sampling head body is inserted into one end of the connecting mechanism. According to the utility model, the mounting end of the sampling head body is guided through the second guide pipe, so that the sampling head body accurately penetrates into the interior of the second sealing ring during insertion, then the sampling head body continues to be inserted into the connecting mechanism, and the mounting end of the sampling head body is guided through the first guide pipe in a similar way; the sampling head body is arranged in the first sealing ring and attached to the air inlet pipe, meanwhile, the mounting end of the sampling head body accurately penetrates into the first sealing ring, positioning and guiding are conducted when the sampling head body is inserted through the second guide pipe and the first guide pipe, and damage caused when the sampling head body is inserted into the second sealing ring and the first sealing ring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dust samplers, in particular to a dust sampling head conversion mechanism. Background Art

[0002] The dust sampling head needs to be installed and docked with the dust sampler during sampling operations. For this purpose, a conversion mechanism needs to be designed at the connection between the dust sampling head and the dust sampler. This design allows users to easily replace or adjust the sampling head to adapt to different sampling needs or environmental conditions. At the same time, through the conversion mechanism, users can easily disassemble, maintain, clean or replace the dust sampling head to ensure the accuracy and reliability of sampling.

[0003] For example, publication number CN219912406U discloses "a sampling head conversion device for a dust sampler", which includes a support and a sampler body. The sampler body is fixed on the support through a positioning seat. A positioning plate is fixedly connected to the front surface of the sampler body. A connecting port is provided between the positioning plate and the sampler body. A sampling head is inserted in the connecting port. Slide grooves are provided on both sides of the positioning plate. A slide rod is fixedly connected in the slide groove. A push plate is slidably sleeved on the slide rod. An elastic mechanism is fixedly connected between the push plate and the inner wall of the slide groove. A fixing hoop is fixedly connected to one side of the push plate. Locking plates are fixedly connected to both ends of the fixing hoop. A bolt is inserted between two adjacent locking plates. Nuts are threadedly sleeved on both ends of the bolt.

[0004] In the prior art, the sampling head and the sampling head conversion mechanism on the side of the sampler are connected by plug-in or threaded connection. When the sampling head is connected by plug-in, although the connection speed between the sampling head and the sampler can be improved, and the efficiency of installation and removal of the sampling head can be improved, the plug-in method can easily cause damage to the seal due to inaccurate direction of the plugging force, resulting in an insufficiently tight connection between the sampling head and the sampling head conversion mechanism, air leakage during sampling, and unstable air flow rate during sampling. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the plug-in method existing in the prior art may easily cause damage to the seal due to inaccurate direction of the plug-in force, resulting in an insufficiently tight connection between the sampling head and the sampling head conversion mechanism, air leakage during sampling, and unstable air flow rate during sampling, and a dust sampling head conversion mechanism is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a dust sampling head conversion mechanism, including a connecting mechanism, a sampler body is fixedly connected to the side of the connecting mechanism, and the sampling head body is plugged into one end of the connecting mechanism, the connecting mechanism includes a fixed sleeve and a No. 2 connecting sleeve, the fixed sleeve is fixedly connected to the side of the sampler body, an air intake pipe is arranged at the center position inside the fixed sleeve, the air intake pipe is fixedly connected to the side of the sampler body, a No. 1 connecting sleeve is fixedly connected to the side of the fixed sleeve, a No. 2 sealing ring is fixedly connected to the inside of the No. 1 connecting sleeve, a No. 2 guide tube is arranged on the side of the No. 2 sealing ring, the No. 2 guide tube is fixedly connected to the inside of the No. 1 connecting sleeve, one end of the sampling head body is fitted with the inside of the No. 2 sealing ring, the No. 2 connecting sleeve is fixedly connected to the inside of the fixed sleeve, and the No. 2 connecting sleeve is fixedly connected to the inside of the No. 2 connecting sleeve, a No. 1 sealing ring is fixedly connected to the inside of the No. 2 connecting sleeve, a No. 1 guide tube is arranged on the side of the No. 1 sealing ring, and one end of the sampling head body is fitted with the inside of the No. 1 sealing ring.

[0007] Preferably, the sampling head body is plugged into the second guide tube, and the sampling head body is plugged into the first guide tube.

[0008] Preferably, the cross sections of the No. 1 guide tube and the No. 2 guide tube are both wedge-shaped.

[0009] Preferably, the end of the air inlet pipe is fitted with one end of the sampling head body.

[0010] Preferably, a mounting tube is fixedly connected inside the fixed sleeve, a No. 3 sealing ring is installed inside the mounting tube, a clamping ring is fixedly connected to the outer surface of the No. 3 sealing ring, and the clamping ring is plugged into the mounting tube.

[0011] Preferably, a sealing ring is fixedly connected inside the No. 3 sealing ring, the interior of the sealing ring is a hollow structure, a No. 4 sealing ring is fixedly connected inside the sealing ring, and one end of the sampling head body is fitted with the interior of the No. 4 sealing ring.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the mounting end of the sampling head body is guided by the No. 2 guide tube, so that the sampling head body can be accurately inserted from the inside of the No. 2 sealing ring when plugged in, and then the sampling head body continues to be inserted into the connection mechanism. Similarly, the mounting end of the sampling head body is guided by the No. 1 guide tube to fit with the air inlet pipe, and at the same time, the mounting end of the sampling head body can be accurately inserted from the inside of the No. 1 sealing ring. The No. 2 guide tube and the No. 1 guide tube are used to position and guide the sampling head body when it is inserted, so as to reduce the damage to the No. 2 sealing ring and the No. 1 sealing ring caused by the insertion of the sampling head body. The connection between the sampling head body and the air inlet pipe is sealed twice by the No. 2 sealing ring and the No. 1 sealing ring, so as to improve the sealing performance of the connection between the sampling head body and the sampler body when sampling.

[0014] 2. In the utility model, after the sampling head body penetrates from the inside of the No. 2 sealing ring, it will enter the inside of the No. 4 sealing ring. At this time, the sealing ring will be squeezed and the cross-section will change from a circle to an ellipse. When the sampling head body and the air inlet pipe are connected, the elastic force of the sealing ring makes the No. 4 sealing ring fit tightly to the surface of the sampling head body, further improving the sealing performance of the connection between the sampling head body and the sampler body. The No. 3 sealing ring, the sealing ring and the No. 4 sealing ring are installed by plugging the clamp ring and the installation tube. When the No. 4 sealing ring is damaged, it is convenient to take out the No. 3 sealing ring, the sealing ring and the No. 4 sealing ring for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional structural schematic diagram of a dust sampling head conversion mechanism is proposed for the utility model;

[0016] Figure 2 The utility model provides a cross-sectional structural diagram of a fixed sleeve and a No. 1 connecting sleeve in a dust sampling head conversion mechanism;

[0017] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0018] Figure 4 The utility model provides a schematic cross-sectional structure diagram of a No. 1 guide tube in a dust sampling head conversion mechanism.

[0019] Legend: 1. Sampler body; 2. Connecting mechanism; 21. Fixed sleeve; 22. Connecting sleeve No. 1; 23. Air inlet pipe; 24. Connecting sleeve No. 2; 25. Sealing ring No. 1; 26. Guide tube No. 1; 27. Sealing ring No. 2; 28. Guide tube No. 2; 29. ​​Mounting tube; 210. Sealing ring No. 3; 211. Retaining ring; 212. Sealing ring; 213. Sealing ring No. 4; 3. Sampling head body. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Embodiment 1

[0023] like Figure 1-Figure 4 As shown, the utility model provides a dust sampling head conversion mechanism, including a connecting mechanism 2, the connecting mechanism 2 is fixedly connected to the sampler body 1 on the side, and the sampling head body 3 is plugged into one end of the connecting mechanism 2, the connecting mechanism 2 includes a fixed sleeve 21 and a second connecting sleeve 24, the fixed sleeve 21 is fixedly connected to the side of the sampler body 1, an air inlet pipe 23 is arranged at the center position inside the fixed sleeve 21, the air inlet pipe 23 is fixedly connected to the side of the sampler body 1, a first connecting sleeve 22 is fixedly connected to the side of the fixed sleeve 21, a second sealing ring 27 is fixedly connected to the inside of the first connecting sleeve 22, and a second guide ring 27 is arranged on the side of the second sealing ring 27 The sampling head body 3 is connected to the inner part of the No. 1 connecting sleeve 22, one end of the sampling head body 3 is fitted with the inner part of the No. 2 sealing ring 27, the No. 2 connecting sleeve 24 is fixedly connected to the inner part of the fixed sleeve 21, and the No. 1 connecting sleeve 24 is fixedly connected with the inner part of the No. 1 sealing ring 25, and the No. 1 guide tube 26 is arranged on the side of the No. 1 sealing ring 25, one end of the sampling head body 3 is fitted with the inner part of the No. 1 sealing ring 25, the sampling head body 3 is plugged with the No. 2 guide tube 28, and the sampling head body 3 is plugged with the No. 1 guide tube 26, the cross-sections of the No. 1 guide tube 26 and the No. 2 guide tube 28 are both wedge-shaped, and the end of the air inlet pipe 23 is fitted with one end of the sampling head body 3.

[0024] The specific configuration and function of this embodiment are described in detail below. When the sampling head body 3 is plugged and installed, the mounting end of the sampling head body 3 is plugged and installed with the inside of the connecting mechanism 2. First, the mounting end of the sampling head body 3 is guided by the second guide tube 28 so that the sampling head body 3 is accurately inserted from the inside of the second sealing ring 27 during plugging. Then, the sampling head body 3 continues to be inserted into the inside of the connecting mechanism 2. Similarly, the mounting end of the sampling head body 3 is guided by the first guide tube 26 so that it is connected with the air inlet pipe 23. The second guide tube 28 and the first guide tube 26 are used to position and guide the sampling head body 3 when it is inserted, thereby reducing the damage caused to the second sealing ring 27 and the first sealing ring 25 by the insertion of the sampling head body 3. The connection between the sampling head body 3 and the air inlet pipe 23 is sealed twice by the second sealing ring 27 and the first sealing ring 25, thereby improving the sealing performance of the connection between the sampling head body 3 and the sampler body 1 when the sampler body 1 is sampling.

[0025] Embodiment 2

[0026] like Figure 3 and Figure 4 As shown, the interior of the fixed sleeve 21 is fixedly connected with the mounting tube 29, and a No. 3 sealing ring 210 is installed inside the mounting tube 29. A clamping ring 211 is fixedly connected to the outer surface of the No. 3 sealing ring 210, and the clamping ring 211 is plugged with the mounting tube 29. A sealing ring 212 is fixedly connected to the interior of the No. 3 sealing ring 210, and the interior of the sealing ring 212 is a hollow structure. A No. 4 sealing ring 213 is fixedly connected to the interior of the sealing ring 212, and one end of the sampling head body 3 is fitted with the interior of the No. 4 sealing ring 213.

[0027] The effect achieved by the entire embodiment is that after the sampling head body 3 penetrates from the inside of the No. 2 sealing ring 27, it will enter the inside of the No. 4 sealing ring 213. At this time, the sealing ring 212 will be squeezed and the cross-section will change from a circle to an ellipse. When the sampling head body 3 and the air inlet pipe 23 are connected, the elastic force of the sealing ring 212 makes the No. 4 sealing ring 213 tightly fit on the surface of the sampling head body 3, further improving the sealing performance of the connection between the sampling head body 3 and the sampler body 1. The No. 3 sealing ring 210, the sealing ring 212 and the No. 4 sealing ring 213 are installed by plugging the clamp ring 211 and the installation tube 29. When the No. 4 sealing ring 213 is damaged, it is convenient to take out the No. 3 sealing ring 210, the sealing ring 212 and the No. 4 sealing ring 213 for replacement.

[0028] The use method and working principle of the device are as follows: when the sampling head body 3 is plugged and installed, the mounting end of the sampling head body 3 is plugged and installed with the inside of the connecting mechanism 2. First, the mounting end of the sampling head body 3 is guided by the No. 2 guide tube 28, so that the sampling head body 3 is accurately inserted from the inside of the No. 2 sealing ring 27 when plugged in, and then the sampling head body 3 continues to be inserted into the inside of the connecting mechanism 2. Similarly, the mounting end of the sampling head body 3 is guided by the No. 1 guide tube 26 to fit with the air inlet pipe 23, and at the same time, the mounting end of the sampling head body 3 is accurately inserted from the inside of the No. 1 sealing ring 25, and the connection between the sampling head body 3 and the air inlet pipe 23 is sealed twice by the No. 2 sealing ring 27 and the No. 1 sealing ring 25;

[0029] After the sampling head body 3 penetrates from the inside of the No. 2 sealing ring 27, it will enter the inside of the No. 4 sealing ring 213. At this time, the sealing ring 212 will be squeezed and the cross-section will change from a circle to an ellipse. The No. 3 sealing ring 210, the sealing ring 212 and the No. 4 sealing ring 213 are installed by plugging the clamp ring 211 and the installation tube 29.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A dust sampling head conversion mechanism, characterized in that: The invention comprises a connecting mechanism (2), wherein a sampler body (1) is fixedly connected to the side of the connecting mechanism (2), and a sampling head body (3) is plugged into one end of the connecting mechanism (2), wherein the connecting mechanism (2) comprises a fixed sleeve (21) and a second connecting sleeve (24), wherein the fixed sleeve (21) is fixedly connected to the side of the sampler body (1), an air inlet pipe (23) is arranged at a central position inside the fixed sleeve (21), and the air inlet pipe (23) is fixedly connected to the side of the sampler body (1), and a first connecting sleeve (22) is fixedly connected to the side of the fixed sleeve (21), wherein the first connecting sleeve (22) A No. 2 sealing ring (27) is fixedly connected inside, a No. 2 guide tube (28) is arranged on the side of the No. 2 sealing ring (27), the No. 2 guide tube (28) is fixedly connected to the inside of the No. 1 connecting sleeve (22), one end of the sampling head body (3) is fitted with the inside of the No. 2 sealing ring (27), the No. 2 connecting sleeve (24) is fixedly connected to the inside of the fixed sleeve (21), and a No. 1 sealing ring (25) is fixedly connected inside the No. 2 connecting sleeve (24), a No. 1 guide tube (26) is arranged on the side of the No. 1 sealing ring (25), and one end of the sampling head body (3) is fitted with the inside of the No. 1 sealing ring (25).

2. A dust sampling head conversion mechanism according to claim 1, characterized in that: The sampling head body (3) is plugged into the second guide tube (28), and the sampling head body (3) is plugged into the first guide tube (26).

3. A dust sampling head conversion mechanism according to claim 1, characterized in that: The cross sections of the first guide tube (26) and the second guide tube (28) are both wedge-shaped.

4. A dust sampling head conversion mechanism according to claim 1, characterized in that: The end of the air inlet pipe (23) is fitted with one end of the sampling head body (3).

5. The dust sampling head conversion mechanism according to claim 1, characterized in that: The fixed sleeve (21) is fixedly connected to a mounting tube (29) inside, a No. 3 sealing ring (210) is installed inside the mounting tube (29), a clamping ring (211) is fixedly connected to the outer surface of the No. 3 sealing ring (210), and the clamping ring (211) is plugged into the mounting tube (29).

6. A dust sampling head conversion mechanism according to claim 5, characterized in that: A sealing ring (212) is fixedly connected inside the third sealing ring (210), the interior of the sealing ring (212) is a hollow structure, a fourth sealing ring (213) is fixedly connected inside the sealing ring (212), and one end of the sampling head body (3) is fitted inside the fourth sealing ring (213).

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