Gas sampling sealing mechanism and gas sampling device

Abstract

The utility model relates to a gas sampling sealing mechanism and a gas sampling device. The gas sampling sealing mechanism comprises a sealing assembly, a sampling bottle and a lifting assembly. The sealing assembly comprises a first fastening piece, a second fastening piece and a sealing ring, one face of the sealing ring makes contact with the first fastening piece, the other face of the sealing ring makes contact with the second fastening piece, the first fastening piece and the second fastening piece are in threaded connection, and when the first fastening piece and the second fastening piece are screwed, the sealing ring is pressed between the first fastening piece and the second fastening piece; the sampling bottle is provided with a bottle opening part, the bottle opening part and the second fastener are correspondingly arranged, the lifting assembly is connected with the first fastener, and the lifting assembly is used for driving the sealing assembly to move in the direction close to the sampling bottle so that the sealing ring can abut against the bottle opening part. According to the gas sampling sealing mechanism, the sealing ring is convenient to disassemble and assemble and not prone to deformation due to screwing, the sealing ring is sealed in the mode that the sealing ring abuts against the bottle opening, and the sealing effect is better.

Description

Technical Field

[0001] The present application relates to the technical field of gas sampling, and in particular to a gas sampling sealing mechanism and a gas sampling device. Background Art

[0002] The tritium carbon sampling device uses the bubbling absorption method to collect HTO (tritiated water) in the concentrated gas. 14 The CO2 component is supplied to the liquid phase, and the absorption liquid is removed with the bottle for subsequent liquid scintillation analysis. Since the sampling device needs to completely absorb the radioactive substances in the sampled gas to ensure the accuracy of subsequent detection, the sampling device has high requirements for the sealing performance of the absorption bottle.

[0003] During the sampling process, a sealing cap needs to be set between the absorption bottle and the bottle cap to improve the sealing performance. The sealing parts are often prone to aging and damage, so the sealing cap needs to be replaced regularly. However, the traditional sealing cap is sealed by screw connection, which has insufficient sealing performance and affects the accuracy of detection. It is also difficult to disassemble and assemble, and is prone to deformation after disassembly and assembly, which has low practicality. Summary of the invention

[0004] Based on this, it is necessary to provide a gas sampling sealing mechanism and a gas sampling device to address the problems of poor sealing and inconvenient disassembly and assembly of the sealing parts.

[0005] In one aspect, the present application provides a sealing mechanism, the gas sampling sealing mechanism comprising:

[0006] A sealing assembly, comprising a first fastener, a second fastener and a sealing ring, wherein one side of the sealing ring contacts the first fastener, and the other side of the sealing ring contacts the second fastener, the first fastener and the second fastener are threadedly connected, and when the first fastener and the second fastener are tightened, the sealing ring is compressed between the first fastener and the second fastener;

[0007] The sampling bottle is provided with a bottle mouth, and the bottle mouth is arranged corresponding to the second fastener;

[0008] A lifting assembly is connected to the first fastener, and the lifting assembly is used to drive the sealing assembly to move toward the sampling bottle so that the sealing ring abuts against the bottle mouth.

[0009] In one embodiment, the second fastener is a rotating member, and the second fastener is respectively provided with a first recess and a second recess at both ends, the second fastener is provided with an internal thread on the inner wall at the first recess, and the first fastener is provided with an external thread to threadably connect the second fastener, and the second recess corresponds to the bottle mouth.

[0010] In one embodiment, the inner wall of the second fastener at the second recess is tapered, and the inner wall of the second fastener at the second recess is gradually expanded in a direction away from the sealing ring.

[0011] In one embodiment, the second fastener is cylindrical, and a protrusion is circumferentially provided on the inner side of the second fastener. The protrusion protrudes toward the axis of the second fastener, and the protrusion is used to place the sealing ring.

[0012] In one embodiment, the lifting assembly includes a cover plate and a lifting unit, the cover plate is provided with a cavity, one end of the first fastener away from the bottle mouth is nested in the cavity, and the lifting unit is used to drive the cover plate to approach or move away from the sampling bottle.

[0013] In one of the embodiments, the first fastener is further provided with a boss, and the boss is provided at an end of the first fastener away from the cover plate, and the boss is provided with a flange, and the flange is used to place the sealing ring.

[0014] In one of the embodiments, the gas sampling sealing mechanism further comprises a base, the base is provided with a groove, the sampling bottle is arranged on the base, and one end of the sampling bottle away from the sealing assembly is located in the groove.

[0015] In one embodiment, the gas sampling sealing mechanism further includes a spring, and the spring is disposed between the sampling bottle and the base.

[0016] In one of the embodiments, the gas sampling sealing mechanism further includes an aeration element, and the aeration element is disposed in the sampling bottle.

[0017] The above-mentioned gas sampling sealing mechanism, on the one hand, by arranging a lifting assembly, enables the sealing assembly to move toward the sampling bottle so that the sealing ring can be abutted against the bottle mouth, without worrying about the slip problem, and the sealing effect is good, thereby improving the accuracy of detection and experimental data; on the other hand, the first fastener and the second fastener are tightened by threading to compress the sealing ring, which improves the firmness of the installation of the sealing ring, and when the sealing ring needs to be replaced, the sealing ring can be removed by simply loosening the first fastener and the second fastener, which is easy to operate.

[0018] On the other hand, the present application also provides a gas sampling device, which includes the above-mentioned gas sampling sealing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the gas sampling sealing mechanism in one embodiment of the present application.

[0020] Figure 2 It is an exploded view of the gas sampling sealing mechanism in one embodiment of the present application.

[0021] Figure 3 for Figure 2 A magnified schematic diagram of center A.

[0022] Figure 4 It is a cross-sectional view of a gas sampling sealing mechanism in one embodiment of the present application.

[0023] Figure 5 Schematic diagram of the structure of the first fastener of the gas sampling sealing mechanism in one embodiment of the present application.

[0024] Figure 6 It is a cross-sectional view of a second fastener of a gas sampling sealing mechanism in one embodiment of the present application.

[0025] Figure 7 for Figure 4 A magnified schematic diagram of point B in the middle.

[0026] Figure 8 Schematic diagram of the structure of a gas sampling device in one embodiment of the present application.

[0027] Description of Figure Numbers:

[0028] 100, sealing assembly; 110, first fastener; 111, boss; 111a, flange; 120, second fastener; 120a, first recess; 120b, second recess; 121, raised portion; 130, sealing ring; 200, sampling bottle; 210, bottle mouth; 300, lifting assembly; 310, cover; 310a, concave cavity; 400, base; 400a, groove; 500, elastic support member; 600, aeration member; 700, shell; 700a, chamber. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0035] refer to Figures 1 to 7 The gas sampling sealing mechanism provided in one embodiment of the present application includes a sealing assembly 100, a sampling bottle 200 and a lifting assembly 300. The sealing assembly 100 includes a first fastener 110, a second fastener 120 and a sealing ring 130. One side of the sealing ring 130 contacts the first fastener 110, and the other side of the sealing ring 130 contacts the second fastener 120. The first fastener 110 and the second fastener 120 are threadedly connected. When the first fastener 110 and the second fastener 120 are tightened, the sealing ring 130 is pressed between the first fastener 110 and the second fastener 120. The sampling bottle 200 is provided with a bottle mouth 210, and the bottle mouth 210 is correspondingly arranged with the sealing assembly 100. The lifting assembly 300 is connected with the sealing assembly 100, and is used to drive the sealing assembly 100 to move in a direction close to the sampling bottle 200 so that the sealing ring 130 abuts against the bottle mouth 210.

[0036] The gas sampling sealing mechanism described in the present application, on the one hand, by providing a lifting assembly 300, the sealing assembly 100 can be moved in the direction close to the sampling bottle 200, so that the sealing ring 130 can be abutted against the bottle mouth 210, without worrying about the slip problem, and the sealing effect is good, which can further improve the accuracy of the detection and experimental data; on the other hand, the first fastener 110 and the second fastener 120 are tightened by threading to compress the sealing ring 130, which improves the firmness of the installation of the sealing ring 130, and when the sealing ring 130 needs to be replaced, it only needs to loosen the first fastener 110 and the second fastener 120 to remove the sealing ring 130, which is easy to operate.

[0037] In some embodiments, the second fastener 120 is a rotary type structural member, and the second fastener 120 is respectively provided with a first recess 120a and a second recess 120b at both ends. The second fastener 120 is provided with an internal thread on the inner wall of the first recess 120a, and the first fastener 110 is provided with an external thread to threadably connect the second fastener 120, and the second recess 120b corresponds to the bottle mouth 210.

[0038] For example, reference Figure 2 , Figure 3 , Figure 5 and Figure 6The second fastener 120 is approximately cylindrical, and the end of the second fastener 120 away from the bottle mouth 210 forms a first recess 120a, and the end close to the bottle mouth 210 forms a second recess 120b. The second fastener 120 is provided with an internal thread on the inner wall corresponding to the first recess 120a. Specifically, the internal thread can be directly machined on the inner wall at this location. Corresponding to the internal thread, the first fastener 110 is provided with an external thread so as to tighten the first fastener 110 and the second fastener 120 to each other. The second recess 120b corresponds to the bottle mouth 210. When the lifting assembly 300 drives the sealing assembly 100 to move downward, the bottle mouth 210 enters the second recess 120b until it abuts against the sealing ring 130, so that the internal space of the sampling bottle 200 is in a sealed state.

[0039] In some embodiments, the inner wall of the second fastener 120 at the second recess 120b is tapered, and the inner wall is gradually expanded in the direction away from the sealing ring 130. It can be understood that when the bottle mouth 210 enters the second recess 120b, since the inner wall at the second recess 120b is tapered, the inner wall is inclined relative to the bottle mouth 210, even if there is a small position deviation between the bottle mouth 210 and the sealing ring 130 during alignment, the inner wall can guide the bottle mouth 210 to align with the sealing ring 130, thereby improving the sealing effect.

[0040] In some embodiments, the second fastener 120 is cylindrical, and the second fastener 120 is provided with a protrusion 121, which is circumferential and located inside the second fastener 120. Figure 6 and Figure 7 The protrusion 121 protrudes toward the axis of the second fastener 120 to place the sealing ring 130. By providing the protrusion 121, the sealing ring 130 can be reasonably placed between the first fastener 110 and the second fastener 120 to prevent the sealing ring 130 from falling, thereby providing a stable sealing effect.

[0041] In some embodiments, the lifting assembly 300 includes a cover plate 310 and a lifting unit. The cover plate 310 is provided with a cavity 310a. The end of the first fastener 110 away from the bottle mouth 210 is nested in the cavity 310a. The lifting unit is used to drive the cover plate 310 to approach or move away from the sampling bottle 200.

[0042] For example, reference Figure 1 , Figure 2 and Figure 7, the lifting assembly 300 includes a cover plate 310 and a lifting unit (not shown), and the cover plate 310 is provided with a plurality of concave cavities 310a. In this embodiment, four concave cavities 310a are provided on the bottom side of the cover plate 310, and each concave cavity 310a corresponds to one sealing assembly 100, and one sealing assembly 100 can be installed respectively. The top of the first fastener 110 is nested in the concave cavity 310a. Specifically, the first fastener 110 can be screwed in the concave cavity 310a by thread, or can be fixed in the concave cavity 310a by bonding, welding, etc., which is not specifically limited here. In this way, by providing the concave cavity 310a on the cover plate 310, when the second fastener 120 is screwed and connected to the first fastener 110, the cover plate 310 has a better limiting effect on the first fastener 110, that is, the second fastener 120 can be screwed with a larger screw force, and then the fixing effect of the sealing ring 130 is better.

[0043] The lifting unit is connected to the cover plate 310, and is used to drive the cover plate 310 to move downward to approach the sampling bottle 200 to enter the sampling state, or to move upward to move away from the sampling bottle 200 to cancel the sampling state. Optionally, the lifting unit includes a motor and a lead screw pair, the nut slider of the lead screw pair is fixedly connected to the cover plate 310, the lead screw is vertically arranged, and the motor drives the lead screw to rotate to drive the cover plate 310 to move up and down along the length direction of the lead screw.

[0044] In some embodiments, a position detection unit (not shown) may be further provided to ensure that the lifting unit moves within a set travel range. Exemplarily, the position detection unit may be a displacement sensor.

[0045] In some embodiments, the first fastener 110 is further provided with a boss 111, and the boss 111 is provided at one end of the first fastener 110 away from the cover plate 310, and the boss 111 is provided with a flange 111a, and the flange 111a is used to place the sealing ring 130. Figure 3 , Figure 5 and Figure 7 A downwardly protruding column 111 is provided at the center of the bottom of the first fastener 110, and a flange 111a is provided on the outer peripheral side of the column 111. It can be understood that the flange 111a corresponds to the raised portion 121, and the inner annular edge of the sealing ring 130 can be placed on the flange 111a. In this way, the second fastener 120 can support the middle and edge of the sealing ring 130, thereby improving the fixing stability of the first fastener 110 and the second fastener 120 to the sealing ring 130, so as to further improve the sampling sealing performance.

[0046] In some embodiments, the gas sampling sealing mechanism further comprises a base 400, the base 400 is provided with a groove 400a, and the end of the sampling device away from the sealing assembly 100 is arranged in the groove 400a. Figure 1 and Figure 2 For example, the base 400 is in a rectangular shape and is provided with four circular grooves 400a, and the grooves 400a have circular planes to stably place the sampling bottle 200. When the sampling bottle 200 is placed in the groove 400a, the bottom of the sampling bottle 200 is limited by the inner circumferential wall of the groove 400a and remains in a stable state on the base 400, and is not easy to tip over.

[0047] In other embodiments, the sampling bottle 200 may also be square in shape, and corresponding to the sampling bottle 200 , the groove 400 a may also be square in shape to fit the sampling bottle 200 .

[0048] In some embodiments, the gas sampling sealing mechanism further includes a spring (not shown), which is disposed between the sampling bottle 200 and the base 400. Figure 2 , an elastic support member 500 is arranged in the groove 400a, and the elastic support member 500 includes a spring and two support blocks connected to both ends of the spring. One of the support blocks contacts the circular plane of the base 400 located in the groove 400a, and the other support block is used to contact the bottom of the sampling bottle 200. It can be understood that when the lifting unit drives the cover plate 310 to move downward, so that the sealing ring 130 abuts against the bottle mouth 210, the sampling bottle 200 is subjected to downward pressure, so that the spring is compressed and deformed, and the restoring force of the spring makes the sampling bottle 200 have a tendency to move upward, so that the bottle mouth 210 is pressed upward against the sealing ring 130. In this way, the mutual abutment effect between the sealing ring 130 and the bottle mouth 210 is better, further reducing the probability of gas leakage.

[0049] In some embodiments, the sampling bottle 200 has a double-layer structure. The sampling bottle 200 is made of double-layer glass, and vacuum treatment is performed between the double-layer glass, which improves the heat preservation performance of the sampling bottle 200 and reduces the influence of the external environment on the temperature of the liquid in the sampling bottle 200.

[0050] refer to Figure 4 In some embodiments, the gas sampling sealing mechanism further includes an aeration member 600. Aeration is the process of injecting a gas medium into a liquid medium. In this embodiment, an end surface of the aeration member 600 is provided with an air pipe opening for connecting an air pipe. A plurality of air outlets are provided at intervals on the circumference of the aeration member 600. The air outlets are connected to the air pipe opening through an air flow channel in the aeration member 600, so that the air flow from the air pipe can flow out into the sampling bottle 200 through the air outlets.

[0051] In this embodiment, the aeration member 600 has a resistance loss of no more than 5 kPa, and a maximum gas volume of 1000 L / h, and is supported by rubber and plastic. The aeration member 600 is provided with a plurality of air holes, which are punched by a precision tool.

[0052] The present application also provides a gas sampling device, including the gas sampling sealing mechanism described above. Figure 8 As shown, the gas sampling device includes a shell 700, which is a rectangular parallelepiped. Four partition walls are arranged in the shell 700 to divide the shell 700 into four chambers 700a. The gas sampling sealing mechanism is arranged in one of the chambers 700a, and a gas generating device, a filter and a catalyst (not shown in the figure) are also arranged in the other chambers 700a. The gas sampling device has good sealing performance during sampling, accurate detection results, and the sealing parts are easy to disassemble and replace, which can save manpower, material resources and time costs.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A gas sampling sealing mechanism, characterized in that: The gas sampling sealing mechanism comprises: A sealing assembly, comprising a first fastener, a second fastener and a sealing ring, wherein one side of the sealing ring contacts the first fastener, and the other side of the sealing ring contacts the second fastener, the first fastener and the second fastener are threadedly connected, and when the first fastener and the second fastener are tightened, the sealing ring is compressed between the first fastener and the second fastener; The sampling bottle is provided with a bottle mouth, and the bottle mouth is arranged corresponding to the second fastener; A lifting assembly is connected to the first fastener, and the lifting assembly is used to drive the sealing assembly to move toward the sampling bottle so that the sealing ring abuts against the bottle mouth.

2. The gas sampling sealing mechanism according to claim 1, characterized in that: The second fastener is a rotating part, and the second fastener is respectively provided with a first recess and a second recess at both ends. The second fastener is provided with an internal thread on the inner wall at the first recess, and the first fastener is provided with an external thread to threadably connect the second fastener, and the second recess corresponds to the bottle mouth.

3. The gas sampling sealing mechanism according to claim 2, characterized in that: The inner wall of the second fastener at the second recessed position is tapered, and the inner wall of the second fastener at the second recessed position is gradually expanded in a direction away from the sealing ring.

4. The gas sampling sealing mechanism according to any one of claims 1 to 3, characterized in that: The second fastener is cylindrical, and a protrusion is circumferentially arranged on the inner side of the second fastener. The protrusion protrudes toward the direction close to the axis of the second fastener, and the protrusion is used to place the sealing ring.

5. The gas sampling sealing mechanism according to any one of claims 1 to 3, characterized in that: The lifting assembly includes a cover plate and a lifting unit. The cover plate is provided with a cavity. One end of the first fastener away from the bottle mouth is nested in the cavity. The lifting unit is used to drive the cover plate to approach or move away from the sampling bottle.

6. The gas sampling sealing mechanism according to claim 5, characterized in that: The first fastener is further provided with a boss, and the boss is arranged at an end of the first fastener away from the cover plate, and the boss is provided with a flange, and the flange is used to place the sealing ring.

7. The gas sampling sealing mechanism according to any one of claims 1 to 3, characterized in that: The gas sampling sealing mechanism also includes a base, the base is provided with a groove, the sampling bottle is arranged on the base, and one end of the sampling bottle away from the sealing assembly is located in the groove.

8. The gas sampling sealing mechanism according to claim 7, characterized in that: The gas sampling sealing mechanism further comprises a spring, and the spring is arranged between the sampling bottle and the base.

9. The gas sampling sealing mechanism according to claim 1, characterized in that: The gas sampling sealing mechanism further comprises an aeration member, and the aeration member is arranged in the sampling bottle.

10. A gas sampling device, characterized in that: It comprises the gas sampling sealing mechanism as described in any one of claims 1-8.

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