Sampling clamp for collecting multi-component dust

Abstract

The utility model discloses a sampling clamp for collecting multi-component dust, relates to sampling clamp technical field, including base, four sets of filter membrane, mounting seat and rotating seat, the inner cavity of base is equipped with the filter plate, the inner surface of base and the top end of filter plate are connected with the cross plate, the top of base forms four sets of fan-shaped chamber through the cross plate, the fan-shaped chamber is equipped with the filter membrane, the mounting seat is equipped with the rotating seat, and the rotating seat is equipped with the rotating seat. Four groups of fan-shaped cavities are formed in the top of the mounting seat, four groups of filter membranes are respectively located in the four groups of fan-shaped cavities, four groups of air holes are formed in the top of the mounting seat and correspond to the positions of the four groups of fan-shaped cavities, and the bottom of the rotating seat is rotatably connected with the top of the mounting seat. The dust measurement filter membrane is cut and then loaded into the corresponding sector, the air inlet pipe is rotated to the corresponding sector, and dust of the corresponding type is collected and then measured through a gravimetric method. The structure supports the concentration sampling of the same post in which dust with various components is contacted, and also can support the dust concentration sampling evaluation with relatively large concentration fluctuation in different time periods.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling clamps, in particular to a sampling clamp for collecting multi-component dust. Background Art

[0002] The existing 37mm dust sampling clip can be fixed with a 37mm dust filter membrane, and the dust samples collected from dusty work stations are measured by weight. However, this sampling method is not suitable for jobs that are exposed to multiple components of dust. Take the batching position in a cement plant as an example. During different periods of a work cycle, workers need to be exposed to different types of dust, such as silica dust, mica dust, cement dust, and other dusts. The occupational exposure limits and hazards of different dusts are not consistent, and they all need to be collected and measured separately for evaluation.

[0003] The existing dust sampling clamp will collect different components of dust into the dust filter membrane at the same time, making it impossible to understand the actual concentration and actual harm of exposure to a specific dust. For this reason, we propose a sampling clamp for collecting multi-component dust. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sampling clamp for collecting multi-component dust, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a sampling clamp for collecting multi-component dust, comprising a base, four groups of filter membranes, a mounting seat and a rotating seat, the inner cavity of the base is installed with a filter plate, the inner surface of the base and the top of the filter plate are commonly connected with a cross plate, the top of the base forms four groups of fan-shaped chambers through the cross plate, the four groups of filter membranes are respectively located in the four groups of fan-shaped chambers, four groups of air holes are opened at the top of the mounting seat and corresponding to the positions of the four groups of fan-shaped chambers, the bottom of the rotating seat and the top of the mounting seat are rotatably connected, and an air inlet pipe is connected to the edge of the rotating seat and the position corresponding to a group of air holes.

[0006] As a further technical solution of the utility model, the bottom of the base is connected to a gas collecting hopper, and the outlet end of the gas collecting hopper is connected to an air outlet pipe.

[0007] As a further technical solution of the utility model, the bottom of the mounting seat is located at the top of the base, and a first rubber pad is connected to the bottom end of the mounting seat and located outside the four groups of air holes, and the bottom end of the first rubber pad is in contact with the top end of the cross plate.

[0008] As a further technical solution of the utility model, the top edge of the mounting seat is connected with an annular frame, the bottom edge of the rotating seat is provided with a frame groove, and the annular frame is located inside the frame groove.

[0009] As a further technical solution of the utility model, the outer surface of the mounting seat and the positions corresponding to the four groups of air holes are connected with lower pointers, and the outer surface of the rotating seat and the position corresponding to the air intake pipe are connected with an upper pointer.

[0010] As a further technical solution of the utility model, a second rubber pad is connected to the bottom end of the rotating seat and located outside the air outlet end of the air inlet pipe, and the bottom end of the second rubber pad is in contact with the top end of the mounting seat. Beneficial Effects

[0011] The utility model provides a sampling clamp for collecting multi-component dust. Compared with the prior art, it has the following beneficial effects:

[0012] 1. A sampling clamp for collecting multi-component dust, which is designed as four quarter-area sector sampling clamps, and the dust filter membrane is cut and installed in the corresponding sector. The corresponding type of dust is collected by rotating the air intake pipe to the corresponding sector, and then measured by weight method. This structure supports the concentration sampling of the same post where multiple components of dust are exposed, and can also support the sampling and evaluation of dust concentration with large concentration fluctuations at different time periods.

[0013] 2. A sampling clamp for collecting multi-component dust, by setting a lower pointer corresponding to four groups of air holes and an upper pointer corresponding to the air inlet pipe, it can be clearly known whether the air inlet pipe is connected to a group of air holes, which is convenient for switching according to sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a sampling clamp for collecting multi-component dust;

[0015] Figure 2 It is a schematic diagram of the split structure of a sampling clamp for collecting multi-component dust;

[0016] Figure 3 It is a schematic diagram of the top structure of a base in a sampling clamp for collecting multi-component dust;

[0017] Figure 4 A schematic diagram of the bottom structure of a base in a sampling clamp for collecting multi-component dust;

[0018] Figure 5 It is a schematic diagram of the top structure of a mounting seat in a sampling clamp for collecting multi-component dust;

[0019] Figure 6 A schematic diagram of the bottom structure of a mounting seat in a sampling clamp for collecting multi-component dust;

[0020] Figure 7 It is a schematic diagram of the top structure of a rotating seat in a sampling clamp for collecting multi-component dust;

[0021] Figure 8 The present invention is a schematic diagram of the bottom structure of a rotating seat in a sampling clamp for collecting multi-component dust.

[0022] In the figure: 1, base; 2, filter membrane; 3, mounting seat; 4, rotating seat; 5, filter plate; 6, cross plate; 7, air hole; 8, air inlet pipe; 9, air collecting hopper; 10, air outlet pipe; 11, first rubber pad; 12, ring frame; 13, lower pointer; 14, second rubber pad; 15, frame groove; 16, upper pointer. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-8 The utility model provides a technical solution for a sampling clamp for collecting multi-component dust: a sampling clamp for collecting multi-component dust, comprising a base 1, four groups of filter membranes 2, a mounting seat 3 and a rotating seat 4, a filter plate 5 is installed in the inner cavity of the base 1, a cross plate 6 is connected to the inner surface of the base 1 and the top of the filter plate 5, four groups of fan-shaped chambers are formed on the top of the base 1 through the cross plate 6, four groups of filter membranes 2 are respectively located in the four groups of fan-shaped chambers, four groups of air holes 7 are opened at the top of the mounting seat 3 and at positions corresponding to the four groups of fan-shaped chambers, the bottom of the rotating seat 4 and the top of the mounting seat 3 are rotatably connected, an air inlet pipe 8 is connected to the edge of the rotating seat 4 and at a position corresponding to a group of air holes 7, an air collecting hopper 9 is connected to the bottom of the base 1, and an outlet end of the air collecting hopper 9 An air outlet pipe 10 is connected, the bottom of the mounting seat 3 is located at the top of the base 1, and a first rubber pad 11 is connected to the bottom end of the mounting seat 3 and located outside the four groups of air holes 7, and the bottom end of the first rubber pad 11 fits with the top of the cross plate 6, and a ring frame 12 is connected to the top edge of the mounting seat 3, and a frame groove 15 is opened at the bottom edge of the rotating seat 4, and the ring frame 12 is located inside the frame groove 15, and a lower pointer 13 is connected to the outer surface of the mounting seat 3 and the positions corresponding to the four groups of air holes 7, and an upper pointer 16 is connected to the outer surface of the rotating seat 4 and the position corresponding to the air inlet pipe 8, and a second rubber pad 14 is connected to the bottom end of the rotating seat 4 and located outside the air outlet end of the air inlet pipe 8, and the bottom end of the second rubber pad 14 fits with the top of the mounting seat 3.

[0025] It should be noted that the sampling clamp is a transparent structure as a whole. When the bottom of the mounting seat 3 is installed on the top of the base 1, the bottom end of the first rubber pad 11 is in contact with the top of the cross plate 6, so that the four groups of fan-shaped chambers are in a separated state, and the positions of the four groups of air holes 7 and the four groups of fan-shaped chambers correspond one to one, and the bottom of the rotating seat 4 and the top of the mounting seat 3 are rotatably connected through the annular frame 12 and the frame groove 15, and then the bottom end of the second rubber pad 14 is in contact with the top of the mounting seat 3. When the upper pointer 16 and a group of lower pointers 13 are aligned, the air inlet pipe 8 and the corresponding group of air holes 7 are in a connected structure, and the second rubber pad 14 closes the remaining three groups of air holes 7.

[0026] The working principle of the utility model is as follows: when in use, firstly, before sampling, the 37mm dust filter membrane is cut into four quarter-sector filter membranes, and the four sector filter membranes are numbered ABCD in sequence and then weighed. The four weighed sector filter membranes are sequentially loaded into the four groups of sector chambers, and then the positions of the four groups of air holes 7 and the four groups of sector chambers are matched one by one, so that when the bottom of the mounting seat 3 is mounted on the top of the base 1, the bottom end of the first rubber pad 11 is in contact with the top of the cross plate 6, so that the four groups of sector chambers are in a separated state;

[0027] When the upper pointer 16 and a group of lower pointers 13 are aligned, the air inlet pipe 8 and the corresponding group of air holes 7 are in a communicating structure, and the second rubber pad 14 seals the remaining three groups of air holes 7, so that the air outlet pipe 10 is connected to the dust sampler through a hose. When sampling, the air flow passes through the air inlet pipe 8, a group of air holes 7, a group of fan-shaped chambers, the air collecting hopper 9 and the air outlet pipe 10, and the dust is filtered by the fan filter membrane.

[0028] On site, according to the sampling plan, air sampling is continued according to the sampling dust types in different areas. By rotating the rotating seat 4, the air inlet pipe 8 is connected with the remaining group of air holes 7 to realize the switching of dust sampling in different areas. After sampling, the sampling clamp is removed, and the fan-shaped dust in different areas is taken out in turn. The weight gain of the dust filter membrane after sampling is weighed and divided by the air sampling volume, and the dust concentration of different components can be calculated.

Claims

1. A sampling clamp for collecting multi-component dust, characterized in that: The invention comprises a base (1), four groups of filter membranes (2), a mounting seat (3) and a rotating seat (4), wherein a filter plate (5) is mounted in the inner cavity of the base (1), the inner surface of the base (1) and the top of the filter plate (5) are connected to a cross plate (6), the top of the base (1) forms four groups of fan-shaped chambers through the cross plate (6), the four groups of filter membranes (2) are respectively located in the four groups of fan-shaped chambers, four groups of air holes (7) are opened at the top of the mounting seat (3) and at positions corresponding to the four groups of fan-shaped chambers, the bottom of the rotating seat (4) and the top of the mounting seat (3) are rotatably connected, and an air inlet pipe (8) is connected to the edge of the rotating seat (4) and at a position corresponding to a group of air holes (7).

2. A sampling clamp for collecting multi-component dust according to claim 1, characterized in that: The bottom of the base (1) is connected to a gas collecting hopper (9), and the outlet end of the gas collecting hopper (9) is connected to an air outlet pipe (10).

3. A sampling clamp for collecting multi-component dust according to claim 1, characterized in that: The bottom of the mounting seat (3) is located at the top of the base (1), and a first rubber pad (11) is connected to the bottom end of the mounting seat (3) and outside the four groups of air holes (7), and the bottom end of the first rubber pad (11) is in contact with the top end of the cross plate (6).

4. A sampling clamp for collecting multi-component dust according to claim 1, characterized in that: The top edge of the mounting seat (3) is connected to an annular frame (12), the bottom edge of the rotating seat (4) is provided with a frame groove (15), and the annular frame (12) is located inside the frame groove (15).

5. The sampling clamp for collecting multi-component dust according to claim 1, characterized in that: The outer surface of the mounting seat (3) and the positions corresponding to the four groups of air holes (7) are all connected to lower pointers (13), and the outer surface of the rotating seat (4) and the positions corresponding to the air inlet pipe (8) are connected to upper pointers (16).

6. A sampling clamp for collecting multi-component dust according to claim 1, characterized in that: A second rubber pad (14) is connected to the bottom end of the rotating seat (4) and is located outside the air outlet end of the air inlet pipe (8), and the bottom end of the second rubber pad (14) fits with the top end of the mounting seat (3).

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