An air sampling device

Abstract

The utility model provides a kind of air sampling device, including sampling sleeve, the sampling net cylinder being arranged in the inside of sampling sleeve, sampling head is sleeved in the front end of sampling net cylinder, fixed flange is screw-connected in the front end of sampling sleeve, the front end of fixed flange is provided with protective sleeve, and protective sleeve is detachably connected with fixed flange.After using tweezers and other tools to sleeve connect sampling head to the upper end of sampling net cylinder, first, protective sleeve is installed to the front end of fixed flange, second, the front end of sampling head is controlled to pass through fixed flange and protective sleeve in turn, then fixed flange and protective sleeve are controlled to move towards sampling sleeve, after that, fixed flange and protective sleeve are controlled to rotate synchronously, so that the rear end of fixed flange is screw-connected with the front end of sampling sleeve, and at the same time, protective sleeve can shield sampling head, so that operator is not easy to directly contact with sampling head, so it is not easy to affect the accuracy of subsequent sampling.

Description

Technical Field

[0001] This utility model relates to sampling devices, and more particularly, to an air sampling device. Background Technology

[0002] Currently, Chinese patent CN217059557U discloses a sampling gun, which includes a sampling gun handle, a sampling gun barrel disposed at the front end of the sampling gun handle, a connecting cylinder disposed at the front end of the sampling gun barrel, a sampling sleeve disposed at the front end of the connecting cylinder, a sampling cylinder disposed inside the sampling sleeve, a sampling head sleeved on the front end of the sampling cylinder, and a fixing flange threadedly connected to the outer side of the front end of the sampling sleeve.

[0003] The sampling sleeve has an external thread on its front outer wall and two threaded holes at its front end, which are located on both sides corresponding to the diameter of the external thread. A first set screw and a second set screw are threaded into the two threaded holes respectively. The sampling tube is inserted into the sampling sleeve and fixed by the first set screw and the second set screw in conjunction with the threaded holes to prevent the sampling tube from shaking.

[0004] However, when assembling the above-mentioned sampling gun, it is necessary to continuously rotate the fixing flange to fix the sampling head to the sampling tube. During the rotation of the fixing flange, the operator's hand is likely to come into direct contact with the sampling head, which will affect the accuracy of sampling. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an air sampling device that has the advantage that the operator is less likely to come into direct contact with the sampling head during the assembly process, thus less likely to affect the accuracy of the sampling.

[0006] To solve the above-mentioned technical problems, the present invention provides an air sampling device, comprising a sampling sleeve, a sampling mesh tube disposed inside the sampling sleeve, a sampling head sleeved on the front end of the sampling mesh tube, and a fixing flange threadedly connected to the front end of the sampling sleeve. The fixing flange presses and fixes the sampling head and the sampling mesh tube together. A protective sleeve is provided at the front end of the fixing flange. The protective sleeve is detachably connected to the fixing flange. An clearance through hole is provided through the center of the protective sleeve, and the front end of the sampling head passes through the clearance through hole.

[0007] With the above technical solution, after using tools such as tweezers to attach the sampling head to the upper end of the sampling sleeve, the protective sleeve is first installed on the front end of the fixed flange. Then, the front end of the sampling head is controlled to pass through the fixed flange and the protective sleeve in sequence. Next, the fixed flange and the protective sleeve are controlled to move towards the sampling sleeve so that the rear end of the fixed flange contacts the front end of the sampling sleeve. Then, the fixed flange and the protective sleeve are controlled to rotate synchronously so that the rear end of the fixed flange is threadedly connected to the front end of the sampling sleeve. Finally, the protective sleeve is removed from the front end of the fixed flange to avoid the protective sleeve affecting the sampling process.

[0008] When rotating the fixed flange, the protective sleeve can shield the sampling head, making it difficult for operators to come into direct contact with the sampling head, thus minimizing the impact on the accuracy of subsequent sampling.

[0009] Preferably, the protective sleeve includes a protective flexible plate, a hook and loop fastener side disposed on the outer left side of the protective flexible plate, and a hook and loop fastener side disposed on the inner right side of the protective flexible plate. When the hook and loop fastener side is fixedly connected to the hook and loop fastener side, the inner wall of the protective flexible plate is tightly attached to the outer wall of the fixed flange.

[0010] Through the above technical solution, the Velcro side and the Velcro female side cooperate to connect the left and right ends of the protective cover and form a protective cover, making it easier to install and remove the protective cover.

[0011] Preferably, a limiting annular groove is formed on the outer wall of the front end of the fixed flange, the central axis of the limiting annular groove coincides with the central axis of the fixed flange, and a limiting rib is provided on the inner wall of the lower end of the protective sleeve, the limiting rib being housed in the limiting annular groove.

[0012] Through the above technical solution, the limiting ring groove and the limiting rib can cooperate to limit the axial movement of the protective sleeve, thereby improving the connection stability between the protective sleeve and the fixed flange, and ensuring that the protective sleeve can effectively protect the sampling head during the assembly of the above sampling device.

[0013] Preferably, the limiting ring groove is narrowed, and the limiting rib is clamped and fixed in the limiting ring groove.

[0014] Through the above technical solution, the limiting ring groove is designed with a narrow opening, which can prevent the limiting rib from coming out of the limiting ring groove and further improve the connection stability between the protective sleeve and the fixed flange.

[0015] Preferably, the limiting rib is sewn to the lower inner wall of the protective sleeve via needle and thread, and the length of the limiting rib is less than the length of the protective soft plate.

[0016] With the above technical solution, the limiting rib is fixed to the lower inner wall of the protective sleeve by sewing with needle and thread, which has the advantage of being easy to assemble and disassemble.

[0017] Preferably, the outer wall of the fixed flange is provided with a plurality of threaded holes evenly distributed circumferentially, and each of the threaded holes is arranged radially along the fixed flange. The flange also includes a toggle rod, one end of which is provided with an external connecting thread, and the toggle rod is threadedly connected to the threaded hole via the external connecting thread.

[0018] With the above technical solution, at least one lever is installed on the outer wall of the fixed flange during use, so that the operator can drive the fixed flange to rotate by the lever, making the assembly of the above sampling device more convenient.

[0019] Preferably, the other end of the actuating lever is provided with a spherical protrusion, the diameter of which is larger than the diameter of the actuating lever.

[0020] The above technical solution makes the surface of the spherical protrusion smoother and less likely to scratch the operator's hands. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0022] Figure 2 This is a cross-sectional schematic diagram of an embodiment;

[0023] Figure 3 for Figure 2 Enlarged view of part A;

[0024] Figure 4 This is a partial schematic diagram of the protective cover.

[0025] Reference numerals: 1. Sampling sleeve; 2. Sampling mesh tube; 3. Sampling head; 4. Fixing flange; 5. Protective sleeve; 51. Protective flexible plate; 52. Velcro front face; 53. Velcro back face; 6. Clearance through hole; 7. Limiting ring groove; 8. Limiting rib; 9. Threaded hole; 10. Actuating rod; 11. Spherical protrusion. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0027] An air sampling device, such as Figures 1 to 4 As shown, it includes a sampling sleeve 1, a sampling mesh tube 2 disposed inside the sampling sleeve 1, a sampling head 3 sleeved on the front end of the sampling mesh tube 2, and a fixing flange 4 threadedly connected to the front end of the sampling sleeve 1. The fixing flange 4 presses and fixes the sampling head 3 and the sampling mesh tube 2 together.

[0028] A protective sleeve 5 is provided at the front end of the fixed flange 4, and the protective sleeve 5 is detachably connected to the fixed flange 4. A clearance through hole 6 is provided through the center of the protective sleeve 5, and the front end of the sampling head 3 passes through the clearance through hole 6.

[0029] The protective sleeve 5 includes a protective flexible plate 51, a hook and loop fastener face 52 disposed on the outer left side of the protective flexible plate 51, and a hook and loop fastener face 53 disposed on the inner right side of the protective flexible plate 51. When the hook and loop fastener face 52 and the hook and loop fastener face 53 are fixedly connected, the inner wall of the protective flexible plate 51 is tightly attached to the outer wall of the fixed flange 4.

[0030] A limiting annular groove 7 is formed on the outer wall of the front end of the fixed flange 4, and the central axis of the limiting annular groove 7 coincides with the central axis of the fixed flange 4. A limiting rib 8 is provided on the inner wall of the lower end of the protective sleeve 5, and the limiting rib 8 is housed in the limiting annular groove 7.

[0031] In this embodiment, the limiting ring groove 7 is narrowed, and the limiting rib 8 is clamped and fixed in the limiting ring groove 7.

[0032] The limiting rib 8 is sewn to the lower inner wall of the protective sleeve 5 by needle and thread, and the length of the limiting rib 8 is less than the length of the protective soft plate 51.

[0033] A plurality of threaded holes 9 are evenly distributed circumferentially on the outer wall of the fixed flange 4, and each threaded hole 9 is arranged radially along the fixed flange 4. The sampling device also includes an actuating rod 10, one end of which is provided with an external connecting thread, and the actuating rod 10 is threadedly connected to the threaded hole 9 via the external connecting thread. The other end of the actuating rod 10 is provided with a spherical protrusion 11, the diameter of which is larger than the diameter of the actuating rod 10.

[0034] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. An air sampling device, comprising a sampling sleeve (1), a sampling mesh cylinder (2) disposed inside the sampling sleeve (1), a sampling head (3) sleeved on the front end of the sampling mesh cylinder (2), and a fixing flange (4) threadedly connected to the front end of the sampling sleeve (1), wherein the fixing flange (4) presses and fixes the sampling head (3) and the sampling mesh cylinder (2), characterized in that: The front end of the fixed flange (4) is provided with a protective sleeve (5), which is detachably connected to the fixed flange (4). A clearance through hole (6) is provided through the center of the protective sleeve (5), and the front end of the sampling head (3) passes through the clearance through hole (6).

2. The air sampling device according to claim 1, characterized in that: The protective sleeve (5) includes a protective soft plate (51), a hook and loop fastener (52) disposed on the outer left side of the protective soft plate (51), and a hook and loop fastener mat (53) disposed on the inner right side of the protective soft plate (51). When the hook and loop fastener (52) and the hook and loop fastener mat (53) are fixedly connected, the inner wall of the protective soft plate (51) is tightly attached to the outer wall of the fixed flange (4).

3. An air sampling device according to claim 2, characterized in that: A limiting ring groove (7) is provided on the outer wall of the front end of the fixed flange (4). The central axis of the limiting ring groove (7) coincides with the central axis of the fixed flange (4). A limiting rib (8) is provided on the inner wall of the lower end of the protective sleeve (5). The limiting rib (8) is housed in the limiting ring groove (7).

4. An air sampling device according to claim 3, characterized in that: The limiting ring groove (7) is narrowed, and the limiting rib (8) is clamped and fixed in the limiting ring groove (7).

5. An air sampling device according to claim 3, characterized in that: The limiting rib (8) is sewn to the lower inner wall of the protective sleeve (5) by needle and thread, and the length of the limiting rib (8) is less than the length of the protective soft plate (51).

6. An air sampling device according to claim 1, characterized in that: The outer wall of the fixed flange (4) is evenly distributed with a plurality of threaded holes (9) along the circumference, and each of the threaded holes (9) is arranged radially along the fixed flange (4). It also includes a toggle rod (10), one end of which is provided with an external connecting thread, and the toggle rod (10) is threadedly connected to the threaded hole (9) via the external connecting thread.

7. An air sampling device according to claim 6, characterized in that: The other end of the lever (10) is provided with a spherical protrusion (11), the diameter of which is larger than the diameter of the lever (10).

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