A sampler with automatic air tightness detection function

Abstract

The application relates to the technical field of samplers, in particular to a sampler with an automatic air tightness detection function, which comprises a shell, a hinged door arranged on one side of the shell, a sampling box arranged in the shell and used for storing samples, a negative pressure machine arranged in the shell and used for performing negative pressure extraction on the inside of the sampling box, a control center arranged in the shell and used for control, a sampling pipe arranged in the top side of the shell and communicated with the sampling box, and an adjusting assembly arranged on the top of the shell and used for cooperating with the sampling pipe; the adjusting assembly comprises a rotary top cover, a circular groove arranged at the bottom end of the rotary top cover, and an extension shaft rod fixedly connected at the center of the circular groove. In actual use, the sampler can stably switch the sampling process and the air tightness detection process, can simultaneously ensure the smoothness of sampling, can reduce the phenomenon that the sampling process is affected by the pipe diameter difference caused by the connecting piece, and can effectively and automatically perform air tightness detection work.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of samplers, in particular to a sampler with automatic air tightness detection function. BACKGROUND

[0002] The particulate matter air sampler is an instrument for monitoring and collecting suspended particulate matter in the air, which makes a certain volume of air pass through a filter membrane with a known mass at a constant speed, and the particulate matter suspended in the air is retained on the filter membrane, so that the mass concentration of the total suspended particulate matter in the air is determined according to the increased mass of the filter membrane and the volume of the air passing through the filter membrane. It can be used to determine the metal, inorganic salt and organic pollutant components in the particulate matter.

[0003] In actual use, air tightness detection is usually required before sampling, and sampling process can only be carried out after air tightness detection is qualified. In this process, the connecting equipment needs to be replaced, which is cumbersome in use and easy to cause pollution inside the pipeline, affecting the sampling accuracy. Moreover, the connection parts are easy to cause the difference in pipe diameter inside during the sampling process, affecting the smoothness of sampling. Therefore, we propose a sampler with automatic air tightness detection function. SUMMARY

[0004] The purpose of the present application is to solve the shortcomings in the prior art and provide a sampler with automatic air tightness detection function.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The sampler with automatic air tightness detection function comprises a shell, a hinge door rotatably arranged on one side of the shell, a sampling box for storing samples arranged in the shell, a negative pressure machine for negative pressure extraction in the sampling box, and a control center for control arranged in the shell. A sampling pipe is arranged in communication with the sampling box on one side of the top of the shell, and an adjusting assembly for cooperating with the sampling pipe is rotatably arranged on the top of the shell, which facilitates the sampling process and the stable performance of the pre-sequence air tightness detection process.

[0007] The adjusting assembly comprises a rotating top cover, a circular groove is arranged at the bottom end of the rotating top cover, a telescopic shaft is fixedly connected at the center of the groove, one end of the telescopic shaft extends into the shell, two groups of through holes are arranged at the top end of the rotating top cover, a sampling head with the same diameter is connected at the top end of one group of through holes, the top end of the sampling pipe is in contact with the rotating top cover at the inner wall of the top end of the rotating top cover, and the sampling pipe is matched with the through hole.

[0008] The sampling box is provided with an air pressure sensor module and a timer module, both of which are electrically connected with the control center, and the control center is electrically connected with the negative pressure machine, and the control center is further provided with an alarm module for alarm processing during the air tightness detection process.

[0009] As a preferred technical solution of the present application, the rotating top cover is connected with a baffle at one end of the internal part of the shell through extension, and is sleeved with a spring on the outside, and the two ends of the spring are respectively in contact with the inner wall of the top end of the shell and the baffle, so as to ensure the contraction of the spring during the sampling process or the air tightness detection process of the sampling tube inserted into any one of the two groups of through holes, realize the stability of the whole, and ensure the effective performance of the corresponding experiment process.

[0010] As a preferred technical solution of the present application, the bottom end of the rotating top cover is slidably provided with two groups of arc-shaped clamping blocks, and the gap between the two groups of arc-shaped clamping blocks and the inner wall of the rotating top cover forms a circular ring-shaped sliding groove matched with the sampling tube, so as to ensure the relative stability of the sampling tube during the rotation adjustment process of the adjusting assembly.

[0011] An arc-shaped notch is formed on the arc-shaped clamping block and is opposite to the through hole, and the arc-shaped notch is matched with the sampling tube, and the arc-shaped clamping block is directionally movable, and the moving direction is the direction in which the center line of the notch points to the center line of the corresponding through hole.

[0012] The pushing rod is hinged between the arc-shaped clamping block and the telescopic shaft, so that after the sampling tube is inserted into the through hole, the spring acts on it, the adjusting assembly is pressed down as a whole, at this time the pushing rod is deflected, the corresponding arc-shaped clamping block is directionally moved, and the sampling tube is clamped, so as to ensure the stability of the corresponding sampling process or air tightness detection process.

[0013] As a preferred technical solution of the present application, the rotating top cover is provided with two groups of insertion grooves communicated with the through holes on the circumferential surface, and a blocking plate is inserted at the insertion groove away from the sampling head, which is used for air tightness detection process to ensure that the top of the sampling tube is in a blocked state, and provides necessary negative pressure guarantee for the air tightness detection process.

[0014] The rotating top cover is provided with a single-layer filter membrane clamp at the insertion groove corresponding to the sampling head, which is convenient for filtering during the sampling process, and is convenient for pre-sampling during the sampling process. Through the pre-sampling process, it can be judged whether the area is suitable for sampling, so as to have a preliminary understanding of the particle concentration level, particle type and characteristics, environmental factor influence and pollution source situation of the area, and in the formal sampling process, the filter membrane at the single-layer filter membrane clamp can be removed to ensure the effective performance of the normal sampling process below.

[0015] As a preferred technical solution of the present application, the circumferential side of the rotating top cover is also symmetrically provided with two groups of holding rings, which facilitates holding during adjustment and actual operation.

[0016] As a preferred technical solution of the present application, the inside of the top end of the shell is provided with a top partition, and the bottom end of the telescopic shaft extends through the shell to the inside of the top partition, thereby providing a separate space for the telescopic adjustment of the telescopic shaft, avoiding affecting the work of internal elements.

[0017] The bottom of one end of the telescopic shaft inside the top partition is coaxially connected with a plug-in prism, and the inside of the top partition is provided with an output shaft vertical upward control motor, the top end of the control motor is coaxially connected with a synchronous shaft sleeve, the synchronous shaft sleeve is provided with a prism insertion slot matched with the plug-in prism, and the control motor is electrically connected with the control center, so that when the control center is used for air tightness detection or sampling operation, the control motor can automatically rotate in the corresponding direction to realize automatic adjustment.

[0018] As a preferred technical solution of the present application, the inside of the shell is also provided with a filter membrane clamp assembly in communication with the sampling box, and the filter membrane clamp assembly is provided with a plurality of filter membrane clamps, which realizes further filtering treatment of the collected samples through the setting of the filter membrane clamps.

[0019] The inside of the shell is also provided with a filter membrane clamp assembly controller for controlling the filter membrane clamp assembly, so as to effectively adjust the number of filter membrane clamps participating in filtering on the filter membrane clamp assembly, and regulate the actual filtering effect, and control the needs of air tightness detection and sampling process.

[0020] As a preferred technical solution of the present application, the other side of the top end of the shell is symmetrically provided with a support rod corresponding to the sampling pipe, and the diameter of the support rod is the same as that of the sampling pipe, and the height of the support rod is the same as that of the sampling pipe extending to the top end of the shell, so as to ensure that the sampling pipe and the support rod cooperate with the sealing plate to support the bottom of the adjustment assembly during the adjustment of the adjustment assembly, better realize the balanced support of both sides of the whole adjustment assembly, ensure the stability of the adjustment assembly, facilitate actual use, and give space redundancy to the adjustment assembly during lifting process by the setting of the prism insertion slot on the plug-in prism, avoiding the phenomenon of motion interference.

[0021] As a preferred technical scheme of the present application, the air pressure sensor is located inside the sampling box, used for detecting the air pressure inside the sampling box during the air tightness detection process, and the air pressure sensor module is electrically connected with the timer module. When the air pressure inside the sampling box reaches a certain degree during the air tightness detection process, the timer module is triggered, and in this process, the air pressure sensor module feeds back signals to the control center, the control center controls the negative pressure machine to be closed, and then the timer module counts down. When the countdown is completed, the timer module sends signals to the control center. During the countdown process, if the value detected by the air pressure sensor module decreases, it indicates that the internal air tightness is insufficient, at which time the control center controls the alarm module to alarm, thereby achieving the purpose of air tightness detection. Conversely, when the countdown of the timer module ends and the value detected by the air pressure sensor module does not change, it indicates that the internal air tightness of the sampling box is good, and the subsequent sampling process can be carried out.

[0022] The beneficial effects of the present application are:

[0023] 1. First, by adjusting the spring on the adjusting assembly, the overall adjusting assembly is an adjustable structure, and under the elastic constraint of the spring, the sampling pipe is in contact with the inner wall of the top end of the rotating top cover, ensuring the airtightness during the adjusting process and reducing the pollution during the sampling process.

[0024] 2. By providing a through hole on the adjusting assembly, the sampling pipe and the sampling head can be effectively matched, the stable switching between the sampling process and the air tightness detection process is effectively ensured, the smoothness of the sampling process is ensured, and the generation of the internal pipe diameter difference caused by the additional connecting piece is avoided, ensuring the smooth sampling.

[0025] 3. By the air pressure sensor inside the sampling box, the timer module, the control center and the alarm, the automatic detection of the air tightness inside the sampling box is realized, effective preparation for the sampling process is provided, and the phenomenon of sampling failure caused by insufficient air tightness is avoided.

[0026] In summary, the present application can stably switch between the sampling process and the air tightness detection process, can ensure the smoothness of the sampling at the same time, can reduce the phenomenon of affecting the sampling process caused by the pipe diameter difference of the connecting piece, can effectively and automatically perform the air tightness detection operation, and has the advantages of being simple in structure, convenient in use and high in practicability. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The present application provides a structure diagram of a sampler with automatic air tightness detection function;

[0028] Figure 2 The present application provides a structure diagram of a sampler with automatic air tightness detection function;

[0029] Figure 3 A structure diagram of an adjusting assembly of a sampler with automatic air tightness detection function according to the present application;

[0030] Figure 4 A lower structure diagram of an adjusting assembly of a sampler with automatic air tightness detection function according to the present application;

[0031] Figure 5 A bottom structure diagram of an adjusting assembly of a sampler with automatic air tightness detection function according to the present application;

[0032] Figure 6 A structure diagram of an enlarged portion A in FIG. 4; Figure 2

[0033] Figure 7 A process flow diagram of an air tightness detection process of a sampler with automatic air tightness detection function according to the present application.

[0034] In the figure: 1, shell; 2, sampling box; 3, filter membrane clamp assembly controller; 4, filter membrane clamp assembly; 5, control center; 6, top partition; 7, sampling tube; 8, adjusting assembly; 81, rotating top cover; 82, sampling head; 83, holding ring; 84, blocking plate; 85, single-layer filter membrane clamp; 86, telescopic shaft; 87, spring; 88, pushing rod; 89, arc-shaped clamping block; 810, through hole; 811, plug-in prism; 9, support rod; 10, negative pressure machine; 11, opening and closing door; 12, control motor; 13, synchronous shaft sleeve. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0036] Referring to Figures 1-6 A sampler with automatic air tightness detection function, comprising a shell 1, an opening and closing door 11 rotatably arranged on one side of the shell 1, a sampling box 2 for storing samples arranged inside the shell 1, a negative pressure machine 10 for performing negative pressure extraction on the inside of the sampling box 2, a control center 5 arranged inside the shell 1 for control, a sampling tube 7 arranged through the top end of the shell 1 and in communication with the sampling box 2, and an adjusting assembly 8 rotatably arranged at the top end of the shell 1 and used for cooperating with the sampling tube 7, so as to facilitate sampling during the sampling process and stable performance of the pre-sequence air tightness detection process;

[0037] ​The adjusting assembly 8 comprises a rotating top cover 81, the bottom end of the rotating top cover 81 is provided with a circular groove, and a telescopic shaft 86 is fixedly connected at the center of the circular groove, one end of the telescopic shaft 86 extends to the inside of the shell 1, and the top end of the rotating top cover 81 is provided with two groups of penetrating holes 810, and the top end of one group of the penetrating holes 810 is connected with a sampling head 82 of the same diameter, the top end of the sampling tube 7 is in contact with the rotating top cover 81 at the inner wall of the top end of the rotating top cover 81, and the sampling tube 7 is matched with the penetrating hole 810;

[0038] The sampling box 2 is provided with an air pressure sensor module and a timer module, which are electrically connected with the control center 5, and the control center 5 is electrically connected with the negative pressure machine 10, and the control center 5 is also provided with an alarm module for alarm processing during the air tightness detection process;

[0039] The top end of the shell 1 is provided with a top partition layer 6, and the bottom end of the telescopic shaft 86 extends to the inside of the top partition layer 6 through the shell 1, so as to provide a separate space for the telescopic adjustment of the telescopic shaft 86, avoiding affecting the work of the internal elements;

[0040] The bottom end of the telescopic shaft 86 is coaxially connected with a plug-in prism 811 at one end inside the top partition layer 6, and the inside of the top partition layer 6 is provided with an output shaft vertical upward control motor 12, the top end of the control motor 12 is coaxially connected with a synchronous shaft sleeve 13, the synchronous shaft sleeve 13 is provided with a prism slot matched with the plug-in prism 811, and the control motor 12 is electrically connected with the control center 5, so that the control motor 12 can automatically rotate in the corresponding direction when the control center 5 performs air tightness detection or sampling operation, realizing the purpose of automatic adjustment, and the setting of the prism slot on the plug-in prism 811 gives the space redundancy of the adjusting assembly 8 during the lifting process, avoiding the phenomenon of motion interference.

[0041] The inside of the shell 1 is also provided with a filter membrane clamp assembly 4 communicated with the sampling box 2, and the filter membrane clamp assembly 4 is provided with a plurality of filter membrane clamps, which can realize further filtering of the collected samples through the setting of the filter membrane clamps;

[0042] The inside of the shell 1 is also provided with a filter membrane clamp assembly controller 3 for controlling the filter membrane clamp assembly 4, so as to effectively adjust the number of filter membrane clamps participating in the filtering on the filter membrane clamp assembly 4, and control the actual filtering effect, and control the needs of the air tightness detection and sampling process;

[0043] On the other side of the top of the outer shell 1, there are symmetrical support rods 9 corresponding to the sampling tube 7. The diameter of the support rods 9 is the same as that of the sampling tube 7, and the height of the support rods 9 is the same as the height of the sampling tube 7 extending to the top of the outer shell 1. This ensures that during the adjustment of the adjustment component 8, the sampling tube 7 and the support rods 9, together with the sealing plate 84, can support the bottom of the adjustment component 8, so as to better achieve balanced support on both sides of the overall adjustment component 8, ensure the stability of the adjustment component 8, and facilitate practical use.

[0044] Reference Figures 3-5 The rotating top cover 81 extends through to the interior of the outer shell 1 and is connected to a baffle at one end. A spring 87 is sleeved on the outside. The two ends of the spring 87 abut against the inner wall of the top of the outer shell 1 and the baffle, respectively. This ensures that the spring 87 can contract during the sampling process or airtightness test when the sampling tube 7 is inserted into either of the two sets of through holes 810. This ensures the overall stability and the effective conduct of the corresponding experimental process.

[0045] Two sets of arc-shaped clamping blocks 89 are slidably provided at the bottom end of the rotating top cover 81. The gap between the two sets of arc-shaped clamping blocks 89 and the inner wall of the rotating top cover 81 forms an annular sliding groove that is compatible with the sampling tube 7, ensuring the relative stability of the adjustment component 8 and the sampling tube 7 during the rotation adjustment process.

[0046] The arc-shaped clamping block 89 has an arc-shaped notch that is directly opposite to the through hole 810, and the arc-shaped notch is adapted to the sampling tube 7. The arc-shaped clamping block 89 is directional and moves in the direction that the axis of the notch points to the axis of the corresponding through hole 810.

[0047] Both the arc-shaped clamping block 89 and the telescopic shaft 86 are hinged with a pushing rod 88. After the sampling tube 7 is inserted into the through hole 810, it is pressed down by the spring 87. At this time, the pushing rod 88 deflects and pushes the corresponding arc-shaped clamping block 89 to move in a directional direction toward the corresponding through hole 810, thereby locking the sampling tube 7 and further ensuring the stable operation of the corresponding sampling process or airtightness detection process.

[0048] The rotating top cover 81 has two sets of slots connected to the through hole 810 on its peripheral side, and a sealing plate 84 is inserted in the slot away from the sampling head 82. This is used to ensure that the top of the sampling tube 7 is sealed during the airtightness test, and to provide the necessary negative pressure guarantee for the airtightness test process.

[0049] The single-layer filter film clamp 85 is inserted into the slot corresponding to the sampling head 82 of the rotating top cover 81, which facilitates the filtering process during sampling and the pre-sampling process of the sampling process. Through the pre-sampling process, it can be determined whether the area is suitable for sampling, so as to preliminarily understand the particle concentration level, particle type and characteristics, environmental factor influence and pollution source condition of the area, and in the formal sampling process, the single-layer filter film clamp 85 can be removed to ensure the effective performance of the normal sampling process below.

[0050] The circumferential surface of the rotating top cover 81 is also symmetrically provided with two groups of holding rings 83, which facilitate holding during adjustment and facilitate actual operation.

[0051] Referring to Figures 1-2 and Figure 7 , the air pressure sensor is located in the interior of the sampling box 2, which is used for detecting the air pressure in the interior of the sampling box 2 during the air tightness detection process, and the air pressure sensor module is electrically connected with the timer module. During the air tightness detection process, when the air pressure in the interior of the sampling box 2 reaches a certain degree, the timer module will be triggered, and in this process, the air pressure sensor module will feed back a signal to the control center 5, and the control center 5 controls the negative pressure machine 10 to be closed, and then the timer module performs countdown, and after the countdown is completed, the timer module will send a signal to the control center 5. During the countdown process, if the value detected by the air pressure sensor module decreases, it indicates that the internal air tightness is insufficient, at which time the control center 5 controls the alarm module to alarm, so as to achieve the purpose of air tightness detection; otherwise, when the countdown of the timer module ends and the value detected by the air pressure sensor module does not change, it indicates that the air tightness in the interior of the sampling box 2 is good, and the subsequent sampling process can be performed.

[0052] Workflow: during the outdoor sampling process of the device, first of all, the air tightness detection is needed, first of all, the control center 5 controls the control motor 12 to work, drives the synchronous shaft sleeve 13 to realize the rotation of the adjusting assembly 8, makes the sampling pipe 7 align with the through hole 810 away from the sampling head 82, and inserts into the blocking plate 84 at this time, at this time, the other side of the through hole 810 aligns with the supporting rod 9, under the action of the spring 87, the whole adjusting assembly 8 sinks, so that the sampling pipe 7 is inserted into the through hole 810 inside, and is affected by the blocking plate 84, the effect of blocking is achieved, then the control center 5 is operated, first of all, the negative pressure machine 10 is started, negative pressure adsorption is carried out, at this time, the air pressure sensor module sends the negative pressure value in the sampling box 2 to the control center 5, when the target value is reached, the control center 5 controls the negative pressure machine 10 to close, so that the inside of the sampling box 2 presents airtight space, and at this time, a signal is sent to the timer module to count down, before the countdown is completed, if the air pressure sensor module detects that the air pressure value decreases, it indicates that the internal air tightness is insufficient, and the alarm will be warned to prevent the subsequent sampling process, otherwise, it indicates that the air tightness is good;

[0053] During sampling, the control center 5 controls the control motor 12 to drive the synchronous shaft sleeve 13 to rotate the adjusting assembly 8, to realize the communication of the sampling head 82 and the sampling pipe 7, during the rotation and adjustment of the adjusting assembly 8, when the adjusting assembly 8 does not sink, first of all, the single-layer filter membrane clamp 85 is inserted, pre-sampling is carried out, so as to preliminarily understand the particle concentration level, particle type and characteristics, environmental factor influence and pollution source situation of the sampling area, and then in the formal sampling process, the single-layer filter membrane clamp 85 is removed, to ensure the smooth progress of the subsequent sampling process, and then under the action of the spring 87, the top end of the sampling pipe 7 is in full contact with the top end inner wall of the rotating top cover 81, to ensure airtightness and avoid pollution, when the sampling pipe 7 is inserted into the through hole 810 inside and corresponds to the communication of the sampling head 82 or the through hole 810, at this time, under the action of the spring 87, the adjusting assembly 8 sinks, at this time, the push rod 88 deflects, drives the two groups of arc clamping blocks 89 to move directionally, so that the arc clamping blocks 89 clamp the sampling pipe 7, to further ensure the stability during actual use;

[0054] In actual use, the equal-diameter sampling head 82 and sampling pipe 7 are effectively connected through the through hole 810 on the adjusting assembly 8, to ensure the smoothness of the internal channel, facilitate sampling, and effectively and conveniently switch during air tightness detection and sampling, to provide effective convenience for the preparation stage and sampling process of actual sampling.

[0055] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0056] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] The above is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic airtightness testing sampler, comprising a housing (1), an opening and closing door (11) rotatably disposed on one side of the housing (1), a sampling box (2) for storing samples disposed inside the housing (1), and a negative pressure machine (10) for negative pressure extraction of the sampling box (2), and a control center (5) for operation disposed inside the housing (1), characterized in that, A sampling tube (7) communicating with the sampling box (2) is provided on one side of the top of the outer shell (1), and an adjustment component (8) for cooperating with the sampling tube (7) is rotatably provided on the top of the outer shell (1). The adjustment assembly (8) includes a rotating top cover (81). The bottom end of the rotating top cover (81) is provided with a circular groove, and a telescopic shaft (86) is fixedly connected at the center of the groove. One end of the telescopic shaft (86) extends through into the interior of the outer shell (1). The top of the rotating top cover (81) is provided with two sets of through holes (810), and a sampling head (82) of the same diameter is connected to the top of one set of through holes (810). The top of the sampling tube (7) touches the rotating top cover (81) at the inner wall of the top of the rotating top cover (81), and the sampling tube (7) is adapted to the through hole (810). The sampling box (2) is equipped with a pressure sensor module and a timer module, both of which are electrically connected to the control center (5). The control center (5) is also electrically connected to the negative pressure machine (10). The control center (5) is also equipped with an alarm module. The rotating top cover (81) has two sets of slots connected to the through hole (810) on its peripheral side, and a sealing plate (84) is inserted in the slot away from the sampling head (82). A single-layer filter membrane clip (85) is inserted into the slot corresponding to the sampling head (82) of the rotating top cover (81); The top inner side of the outer shell (1) is provided with a top partition (6), and the bottom end of the telescopic shaft (86) extends through the outer shell (1) to the interior of the top partition (6); The telescopic shaft (86) is located inside the top partition (6) and is coaxially connected to a plug-in prism (811). The top partition (6) is equipped with a control motor (12) with the output shaft pointing vertically upward. The top of the control motor (12) is coaxially connected to a synchronous bushing (13). The synchronous bushing (13) is equipped with a prism slot that is compatible with the plug-in prism (811). The control motor (12) is electrically connected to the control center (5). The interior of the outer shell (1) is also provided with a filter membrane clamp assembly (4) that is connected to the sampling box (2), and the filter membrane clamp assembly (4) is provided with multiple layers of filter membrane clamps; On the other side of the top of the outer shell (1), there is a support rod (9) corresponding to the sampling tube (7), and the diameter of the support rod (9) is the same as that of the sampling tube (7), and the height of the support rod (9) is the same as that of the sampling tube (7) extending to the top of the outer shell (1). During the airtightness test, the sampling tube (7) is aligned with the through hole (810) away from the sampling head (82), and the sealing plate (84) is inserted at this time. The through hole (810) on the other side is aligned with the support rod (9). During sampling, the sampling head (82) is connected to the sampling tube (7). During the rotation adjustment of the adjustment component (8), when the adjustment component (8) does not sink, a single-layer filter membrane clip (85) is inserted for pre-sampling. During the formal sampling process, the single-layer filter membrane clip (85) is removed, and the top of the sampling tube (7) fully contacts the inner wall of the top of the rotating top cover (81).

2. The sampler for automatically detecting airtightness according to claim 1, characterized in that, The rotating top cover (81) extends through to the interior of the outer shell (1) and is connected to a baffle at one end. A spring (87) is sleeved on the outside of the telescopic shaft (86). The two ends of the spring (87) abut against the inner wall of the top of the outer shell (1) and the baffle, respectively.

3. The sampler for automatically detecting airtightness according to claim 2, characterized in that, The bottom end of the rotating top cover (81) is slidably provided with two sets of arc-shaped clamping blocks (89), and the two sets of arc-shaped clamping blocks (89) and the inner wall of the rotating top cover (81) form an annular groove that is compatible with the sampling tube (7). The arc-shaped clamping block (89) has an arc-shaped notch that is directly opposite to the through hole (810), and the arc-shaped notch is adapted to the sampling tube (7). The arc-shaped clamping block (89) is directional and moves in the direction of the notch axis pointing to the axis of the corresponding through hole (810). A push rod (88) is hinged between the arc-shaped clamping block (89) and the telescopic shaft (86).

4. The sampler for automatically detecting airtightness according to claim 1, characterized in that, The rotating top cover (81) is also symmetrically provided with two sets of grip rings (83) on its peripheral side.

5. The sampler for automatically detecting airtightness according to claim 1, characterized in that, The interior of the housing (1) is also provided with a filter membrane clamp assembly controller (3) for controlling the filter membrane clamp assembly (4).

6. The sampler for automatically detecting airtightness according to claim 1, characterized in that, The pressure sensor is located inside the sampling box (2) and is used to detect the pressure inside the sampling box (2). The pressure sensor module is electrically connected to the timer module. During the airtightness test, when the pressure inside the sampling box (2) reaches a certain level, the timer module will be triggered. During this process, the pressure sensor module will send a signal back to the control center (5). The control center (5) will control the negative pressure machine (10) to shut down. Then the timer module will count down. After the countdown is completed, the timer module will send a signal to the control center (5). During the countdown, if the value detected by the pressure sensor module decreases, it indicates that the internal airtightness is insufficient. At this time, the control center (5) will control the alarm module to issue a warning, thereby achieving the purpose of airtightness test. Conversely, if the countdown of the timer module ends and the value detected by the pressure sensor module does not change, it indicates that the internal airtightness of the sampling box (2) is good, and the subsequent sampling process can be carried out.

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