Isokinetic sampling cup vacuum seal cap with press-to-exhaust device

Abstract

The utility model discloses an isokinetic sampling cup vacuum seal cover with press type exhaust device, including the cover body main part, the cover body main part adopts the cylindrical structure that is matched with isokinetic sampling cup top opening, the inside of cover body main part is equipped with the mounting hole, the top of cover body main part is conically arranged, the top of cover body main part is equipped with the recess, the inner wall of recess is connected with press button slidingly, the bottom of press button is connected with exhaust valve core, the bottom of exhaust valve core and the inner wall of mounting hole are contacted. The utility model, through setting up pressable exhaust structure at the top of vacuum cover, when generating negative pressure in the pipeline, just need to press exhaust structure simply to balance the pressure of both ends of cover body, and the operator does not need to help extra tool, and easily can pull open vacuum cover, greatly simplifies the operation process, and improved the operation efficiency of on-line particle monitoring system.

Description

Technical Field

[0001] This utility model relates to the technical field of supporting equipment for particle monitoring systems, and more specifically, to a vacuum sealing cap for an isodynamic sampling cup with a press-type exhaust device. Background Technology

[0002] During the operation of an online particle monitoring system, the isokinetic sampling cup, as a core sampling component, directly affects the accuracy of particle monitoring results due to the cleanliness of its internal environment. To prevent foreign objects from entering the isokinetic sampling cup, a vacuum cover is usually installed on top of it to effectively protect the sampling cup.

[0003] However, when the online particle monitoring system is activated, the vacuum pump starts, creating a significant negative pressure within the tubing connecting the isodynamic sampling cup. Under this negative pressure, existing non-ventable vacuum covers adhere tightly to the isodynamic sampling cup or related connecting structures due to the large pressure difference on both sides of the cover, making it difficult for operators to remove. This problem not only affects the normal operation of the online particle monitoring system and reduces work efficiency, but may also damage the vacuum cover or isodynamic sampling cup during forced removal, increasing equipment maintenance costs. Furthermore, improper operation may disrupt the clean environment inside the sampling cup, affecting the reliability of subsequent monitoring data. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide an isodynamic sampling cup vacuum sealing cap with a press-type exhaust device to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution;

[0006] A vacuum sealing cap for an isodynamic sampling cup with a press-type exhaust device includes a cap body. The cap body has a cylindrical structure that matches the top opening of the isodynamic sampling cup. An installation hole is provided on the inner side of the cap body. The top of the cap body is conical and has a groove. A press button is slidably connected to the inner wall of the groove. An exhaust valve core is connected to the bottom of the press button. The bottom of the exhaust valve core contacts the inner wall of the installation hole. A vent hole is provided between the installation hole and the groove. The exhaust valve core is located inside the vent hole. A sealing gasket is fixedly connected to the inner bottom wall of the installation hole. The bottom of the sealing gasket is in close contact with the exhaust valve core. A spring is sleeved on the exhaust valve core. The bottom end of the spring is fixedly connected to the inner wall of the groove, and the top of the spring contacts the press button. Two air inlets are provided on the inner wall of the groove, and a filter mechanism is provided on the inner wall of each air inlet.

[0007] As a further description of the above technical solution:

[0008] A sealing groove is provided on the inner side of the main body of the cover, and an O-ring is embedded in the sealing groove.

[0009] As a further description of the above technical solution:

[0010] The main body of the cover is made of transparent polycarbonate, and the outer side of the push button is provided with anti-slip texture.

[0011] As a further description of the above technical solution:

[0012] The bottom of the press button has a screw hole, and the top of the exhaust valve core has an external thread that is threaded to the screw hole.

[0013] As a further description of the above technical solution:

[0014] A sealing ring is fixedly connected to the bottom of the button, and the outer side of the sealing ring is in contact with the inner wall of the groove.

[0015] As a further description of the above technical solution:

[0016] The filtration mechanism includes a mounting cylinder, the outer side of which is threadedly connected to the inner wall of the air inlet, and a dust filter screen is fixedly connected to the inner wall of the mounting cylinder.

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] 1. Improved ease of operation: By setting a pressable exhaust structure at the top of the vacuum cover, when negative pressure is generated in the pipeline, the pressure at both ends of the cover can be balanced simply by pressing the exhaust structure. Operators can easily open the vacuum cover without the need for additional tools, which greatly simplifies the operation process and improves the operating efficiency of the online particle monitoring system.

[0019] 2. Equipment protection function: Compared with existing non-ventable vacuum covers, which may be damaged by forcibly pulling them open under negative pressure, this solution achieves easy opening by balancing the pressure, effectively avoiding damage to the vacuum cover and isodynamic sampling cup caused by forced operation, reducing equipment maintenance costs and extending equipment service life.

[0020] 3. Combining sealing and dust prevention: The O-ring seal on the inner wall of the cover body and the sealing ring and dust filter in the exhaust structure can effectively prevent foreign objects from entering the isodynamic sampling cup while ensuring the exhaust function, thus ensuring the cleanliness of the sampling cup environment and guaranteeing the accuracy of online particle monitoring results.

[0021] 4. Simple and durable structure: The overall structure of this solution is simple, with few parts. The selected materials such as polycarbonate, nitrile rubber, and microfiber have good durability and adaptability, making it easy to manufacture and maintain, and suitable for large-scale promotion and application. Attached Figure Description

[0022] Figure 1 One of the perspective views of this utility model;

[0023] Figure 2 This is a second perspective view of the present utility model;

[0024] Figure 3 This is a third perspective view of the present invention;

[0025] Figure 4 This is a cross-sectional view of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1. Cover body; 2. Mounting hole; 3. Groove; 4. Press button; 5. Exhaust valve core; 6. Vent hole; 7. Sealing gasket; 8. Spring; 9. Air inlet; 10. Filter mechanism; 101. Mounting cylinder; 102. Dust filter; 11. Sealing groove; 12. O-ring seal; 13. Screw hole; 14. External thread; 15. Sealing ring. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] To overcome the shortcomings of existing non-ventable vacuum covers that are difficult to open when the online particle monitoring system is activated and negative pressure is generated inside the pipeline, this solution provides Example 1:

[0030] Please see Figures 1-4In this utility model: the vacuum sealing cap of the isodynamic sampling cup with a press-type exhaust device includes a cap body 1. The cap body 1 adopts a cylindrical structure that matches the top opening of the isodynamic sampling cup. An installation hole 2 is provided on the inner side of the cap body 1. The top of the cap body 1 is conical. A groove 3 is provided on the top of the cap body 1. A press button 4 is slidably connected to the inner wall of the groove 3. An exhaust valve core 5 is connected to the bottom of the press button 4. The bottom of the exhaust valve core 5 is in contact with the inner wall of the installation hole 2. A vent hole 6 is provided between the installation hole 2 and the groove 3. The exhaust valve core 5 is located inside the vent hole 6. A sealing gasket 7 is fixedly connected to the inner bottom wall of the installation hole 2. The bottom of the sealing gasket 7 is in close contact with the exhaust valve core 5. A spring 8 is sleeved on the exhaust valve core 5. The bottom end of the spring 8 is fixedly connected to the inner wall of the groove 3. The top of the spring 8 is in contact with the press button 4. Two air inlets 9 are provided on the inner wall of the groove 3. A filter mechanism 10 is provided on the inner wall of both air inlets 9.

[0031] In this utility model, when the online particle monitoring system is not turned on, the bottom of the cover body 1 covers the top of the isodynamic sampling cup. At this time, the spring 8 is in a naturally extended state, and the top of the spring 8 supports the pressing button 4. Under the elastic force of the spring 8, the exhaust valve core 5 is tightly fitted with the sealing gasket 7 on the inner wall of the mounting hole 2, and the vent 6 will be closed.

[0032] When the online particle monitoring system is turned on and the vacuum pump starts to create negative pressure in the pipeline, if it is necessary to open the ventable vacuum cover, the operator only needs to press the button 4 on the top of the cover body 1 with their finger. The button 4 moves downward along the inner wall of the groove 3, causing the exhaust valve core 5 to descend, and at the same time compressing the spring 8. After the exhaust valve core 5 moves downward, it will lose its seal on the vent hole 6. The inside of the cover body 1 (connected to the pipeline and under negative pressure) is connected to the outside atmosphere through the vent hole 6 and the air inlet hole 9. Outside air enters the inside of the cover body 1, gradually balancing the pressure at both ends of the cover body 1. When the pressure at both ends of the cover body 1 is equal, the operator can easily pull the cover body 1 off the isodynamic sampling cup.

[0033] After opening the vacuum cover, the operator releases the pressing button 4. The spring 8 returns to its natural extended state under the action of elasticity, which drives the exhaust valve core 5 and the pressing button 4 to reset upward. The exhaust valve core 5 is once again tightly fitted with the sealing gasket 7, closing the vent 6, and waiting for the next use.

[0034] Please see Figure 3 and 4 The inner side of the cover body 1 is provided with a sealing groove 11, and an O-ring 12 is embedded in the sealing groove 11.

[0035] In this invention, the O-ring 12 is made of nitrile rubber, which has excellent oil resistance and sealing properties. It can effectively prevent foreign objects such as external air and dust from entering the sample cup, and at the same time ensure the sealing effect of the cover under negative pressure.

[0036] Please see Figures 1-3 The main body 1 of the cover is made of transparent polycarbonate, and the outer side of the button 4 is provided with anti-slip texture.

[0037] In this utility model, the material of the cover body 1 is a transparent polycarbonate material with good sealing and corrosion resistance. The transparent material makes it easy for operators to observe the internal condition of the isodynamic sampling cup, while the polycarbonate material ensures that the cover body is not easily damaged during long-term use and can adapt to the working environment of the online particle monitoring system.

[0038] The anti-slip texture on the outside of the button 4 increases the friction when the operator presses it, preventing slippage.

[0039] Please see Figure 4 The bottom of the button 4 is provided with a screw hole 13, and the top of the exhaust valve core 5 is provided with an external thread 14 that is threaded to the screw hole 13.

[0040] In this invention, the push button 4 and the exhaust valve core 5 are detachably connected by a screw hole 13 and an external thread 14. Users can easily and quickly disassemble the push button 4, thereby facilitating the replacement and maintenance of the spring 8. At the same time, when the user fixes the bottom end of the exhaust valve core 5 and rotates the push button 4, the distance between the two will decrease, thereby increasing the elastic force of the spring 8 when no force is applied to the push button 4. This allows the exhaust valve core 5 to fit more effectively against the sealing gasket 7, thereby improving the sealing effect on the vent hole 6.

[0041] To prevent dust from the outside air from entering the inside of the cap and contaminating the dynamic sampling cup during the pressure recovery process, this solution provides Example 2:

[0042] Please see Figures 1-4 The filter mechanism 10 includes a mounting cylinder 101, the outer side of which is threadedly connected to the inner wall of the air inlet 9, and a dust filter 102 is fixedly connected to the inner wall of the mounting cylinder 101.

[0043] In this invention, during the pressure recovery process, outside air enters the groove 3 through the mounting cylinder 101 located in the air inlet 9, and then enters through the vent 6. Since the dust filter 102 is set on the inner wall of the mounting cylinder 101 and is made of microfiber, it can effectively prevent external dust and other foreign objects from entering the inside of the cover, avoiding contamination of the power sampling cup. At the same time, workers can clean the dust filter 102 by rotating the mounting cylinder 101, thereby improving the practicality of the device.

[0044] Please see Figure 4 Among them, a sealing ring 15 is fixedly connected to the bottom of the pressing button 4, and the outer side of the sealing ring 15 is in contact with the inner wall of the groove 3.

[0045] In this invention, the sealing ring 15 can seal the space between the pressing button 4 and the inner wall of the groove 3, allowing air to enter only through the air inlet 9 and be effectively filtered by the dust filter 102. This prevents air from entering through the gap between the pressing button 4 and the inner wall of the groove 3, thus avoiding contamination of the power sampling cup.

[0046] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A vacuum sealing cap for an isodynamic sampling cup with a press-type exhaust device, comprising a cap body (1), wherein the cap body (1) adopts a cylindrical structure that matches the top opening of the isodynamic sampling cup, characterized in that: The inner side of the cover body (1) is provided with a mounting hole (2). The top of the cover body (1) is conical. The top of the cover body (1) is provided with a groove (3). A pressing button (4) is slidably connected to the inner wall of the groove (3). An exhaust valve core (5) is connected to the bottom of the pressing button (4). The bottom of the exhaust valve core (5) is in contact with the inner wall of the mounting hole (2). A vent hole (6) is provided between the mounting hole (2) and the groove (3). The exhaust valve core (5) is positioned... Inside the vent (6), a sealing gasket (7) is fixedly connected to the inner bottom wall of the mounting hole (2). The bottom of the sealing gasket (7) is in close contact with the exhaust valve core (5). A spring (8) is sleeved on the exhaust valve core (5). The bottom end of the spring (8) is fixedly connected to the inner wall of the groove (3). The top of the spring (8) is in contact with the pressing button (4). Two air inlets (9) are opened on the inner wall of the groove (3). A filter mechanism (10) is provided on the inner wall of both air inlets (9).

2. The isodynamic sampling cup vacuum sealing cap with a press-type exhaust device according to claim 1, characterized in that: The inner side of the cover body (1) is provided with a sealing groove (11), and an O-ring (12) is embedded in the sealing groove (11).

3. The isokinetic sampling cup vacuum seal cap with press-to-vent device of claim 1, wherein: The main body of the cover (1) is made of transparent polycarbonate, and the outer side of the pressing button (4) is provided with anti-slip texture.

4. The isodynamic sampling cup vacuum sealing cap with a press-type exhaust device according to claim 1, characterized in that: The bottom of the press button (4) is provided with a screw hole (13), and the top of the exhaust valve core (5) is provided with an external thread (14) that is threaded to the screw hole (13).

5. The isokinetic sampling cup vacuum seal cap with press-to-vent device of claim 1, wherein: A sealing ring (15) is fixedly connected to the bottom of the pressing button (4), and the outer side of the sealing ring (15) is in contact with the inner wall of the groove (3).

6. The isodynamic sampling cup vacuum sealing cap with a press-type exhaust device according to claim 1, characterized in that: The filter mechanism (10) includes a mounting cylinder (101), the outer side of which is threadedly connected to the inner wall of the air inlet (9), and a dust filter (102) is fixedly connected to the inner wall of the mounting cylinder (101).

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