Negative pressure storage device for gas collection

Abstract

The utility model relates to the technical field of storage devices, and discloses a negative pressure storage device for gas collection, which comprises a storage bag and a gas inlet pipe fixedly connected to the surface of the storage bag, the storage bag is communicated with the gas inlet pipe, a plugging component is mounted in the gas inlet pipe, and the gas inlet pipe is communicated with the storage bag. The plugging assembly comprises a shell arranged in the air inlet pipe, a fixing pipe fixed to the bottom end of the shell and a plugging block arranged at an opening in the bottom of the fixing pipe, a telescopic rod is arranged between the shell and the plugging block, a spring is arranged on the telescopic rod, the top of the air inlet pipe is sleeved with a cap, and the cap is arranged on the top of the air inlet pipe. Through the plugging assembly, when the gas supply pipe is separated from the gas inlet pipe of the storage device, preliminary plugging can be performed in time through the plugging block, so that the external atmospheric pressure does not cause a small part of gas in the storage device to be discharged from the gas inlet pipe, gas collection is not affected, the use effect of the device is improved, and the actual use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of storage devices, and particularly relates to a negative pressure storage device for gas collection. Background Art

[0002] A negative pressure storage device for gas collection is a tool for collecting and analyzing ambient gases. It forms a closed space and uses the pressure difference to capture and store gas samples to be analyzed. However, although this tool is very useful in many cases, it still has some potential drawbacks. During the collection process, the air pressure inside the storage device is usually lower than that of the external environment. When the supply pipe is detached from the intake pipe of the storage device, the external atmospheric pressure may cause a small amount of gas inside the storage device to be discharged from the intake pipe, affecting the gas collection effect and reducing the use effect of the device. Therefore, we propose a negative pressure storage device for gas collection to solve the above problems. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a negative pressure storage device for gas collection, which solves the problem that when the supply pipe is detached from the intake pipe of the storage device, the external atmospheric pressure may cause a small amount of gas inside the storage device to be discharged from the intake pipe.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A negative pressure storage device for gas collection includes a storage bag and an intake pipe fixedly connected to the surface of the storage bag. The storage bag and the intake pipe are communicated with each other, and a plugging component is installed inside the intake pipe;

[0005] The plugging component includes a housing arranged inside the intake pipe, a fixed pipe fixed to the bottom end of the housing, and a plugging block arranged at the open bottom of the fixed pipe. An expansion rod is arranged between the housing and the plugging block, a spring is arranged on the expansion rod, a cap is sleeved on the top of the intake pipe, and a plurality of exhaust grooves are formed on the surface of the plugging block.

[0006] Preferably, a first annular piece is fixed to the outer surface of the housing, a second annular piece is fixed to the bottom end of the plugging block, the two ends of the expansion rod are respectively fixed to the second annular piece and the first annular piece, the spring is wound around the surface of the expansion rod, and the two ends of the spring are respectively fixed to the second annular piece and the first annular piece. The plugging block is designed in a frustum shape.

[0007] Preferably, a rubber sealing pad is fixed to the side surface of the plugging block with a conical structure to strengthen the gap seal between the plugging block and the fixed pipe.

[0008] Preferably, a threaded groove is formed on the inner side wall of the intake pipe, and the thread on the outside of the housing is threadedly connected to the threaded groove formed on the intake pipe.

[0009] Preferably, a clamping groove is formed at the top of the housing for screwing the housing into the inside of the air inlet pipe.

[0010] Preferably, a connecting rope is fixed between the cap and the air inlet pipe.

[0011] Beneficial effects

[0012] The utility model provides a negative pressure storage device for gas collection. Compared with the prior art, the following beneficial effects are achieved:

[0013] For the negative pressure storage device for gas collection, when the air supply pipe is separated from the air inlet pipe of the storage device through the blocking component, preliminary blocking can be timely carried out through the blocking block, so that the external atmospheric pressure will not cause a small amount of gas inside the storage device to be discharged from the air inlet pipe, which will not affect the gas collection, improve the use effect of the device, and meet the actual use requirements. Description of the drawings

[0014] Figure 1 It is a schematic top view structure diagram of the whole utility model;

[0015] Figure 2 It is a partial cross-sectional view of the air inlet pipe structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the structures of the connecting parts such as the blocking block and the clamping groove of the utility model;

[0017] Figure 4 It is a cross-sectional view of the housing structure of the utility model.

[0018] In the figure: 1, storage bag; 101, air inlet pipe; 2, blocking component; 201, cap; 202, connecting rope; 203, housing; 204, fixed pipe; 205, first annular piece; 206, second annular piece; 207, blocking block; 208, spring; 209, telescopic rod; 210, thread groove; 211, clamping groove. Specific implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] As Figure 1 shown:

[0021] A negative-pressure storage device for gas collection, comprising a storage bag 1 and an air inlet pipe 101 fixedly connected to the surface of the storage bag 1. The storage bag 1 is in communication with the air inlet pipe 101.

[0022] In this embodiment: Further improvements are made to the existing main body of this application. For details, refer to the publicly disclosed technology below. To solve the technical problems existing in this prior art, such as those disclosed in the background art above, "During the collection process, the air pressure inside the storage device is usually lower than that of the external environment. When the supply pipe is detached from the air inlet pipe 101 of the storage device, the external atmospheric pressure may cause a small amount of gas inside the storage device to be discharged from the air inlet pipe 101, affecting the gas collection effect and reducing the usage effect of the device." In combination, this problem is obviously a real and difficult problem to solve. In view of this, to solve this technical problem, a blocking component 2 is added to this application document.

[0023] Furthermore:

[0024] As Figures 1-4 shown:

[0025] A blocking component 2 is installed inside the air inlet pipe 101. The blocking component 2 includes a housing 203 arranged inside the air inlet pipe 101, a fixed pipe 204 fixed to the bottom end of the housing 203, and a blocking block 207 arranged at the open bottom of the fixed pipe 204. A telescopic rod 209 is arranged between the housing 203 and the blocking block 207. A spring 208 is arranged on the telescopic rod 209. A cap 201 is sleeved on the top of the air inlet pipe 101. Multiple groups of exhaust grooves are formed on the surface of the blocking block 207. An annular piece one 205 is fixed to the outer surface of the housing 203. An annular piece two 206 is fixed to the bottom end of the blocking block 207. The two ends of the telescopic rod 209 are respectively fixed to the annular piece two 206 and the annular piece one 205. The spring 208 is wound around the surface of the telescopic rod 209. The two ends of the spring 208 are respectively fixed to the annular piece two 206 and the annular piece one 205. The blocking block 207 is designed in a frustum shape.

[0026] In this embodiment: When the negative-pressure storage device for gas collection is in use, when the equipment supply pipe (not shown in the figure) is inserted into the air inlet pipe 101, at this time, the supply pipe follows the fixed pipe 204 and squeezes the blocking block 207. As the blocking block 207 continuously moves downward, it drives the annular piece two 206 to move downward. The spring 208 and the telescopic rod 209 are stretched by driving the annular piece two 206. At this time, the blocking block 207 is separated from the fixed pipe 204, and the gas is discharged along the exhaust grooves (not shown in the figure). Then, the gas discharged from the exhaust grooves enters through the gap between the blocking block 207 and the fixed pipe 204 and is discharged into the storage bag 1 along the air inlet pipe 101 to collect the gas.

[0027] After the storage bag 1 has completed gas collection, when the supply pipe is being pulled out of the intake pipe 101, the spring 208 that is in a stretched state during this process will continuously contract, causing the telescopic rod 209 and the plugging block 207 to continuously return to their original positions to plug the port of the fixed pipe 204. When the plugging block 207 plugs the fixed pipe 204, the supply pipe has not completely detached from the fixed pipe 204. Once the supply pipe is removed from the fixed pipe 204, the plugging block 207 has already achieved the plugging operation on the open end of the fixed pipe 204. Subsequently, the cap 201 is used to plug the intake pipe 101.

[0028] Through the above operations, when the supply pipe is detached from the intake pipe 101 of the storage device, it can be preliminarily plugged in time by the plugging block 207, so that the external atmospheric pressure will not cause a small amount of gas inside the storage device to be discharged from the intake pipe 101, which will not affect the gas collection, improve the use effect of the device, and meet the actual use requirements.

[0029] It should be noted that: the diameter of the supply pipe of the device is adapted to the inner diameter of the fixed pipe 204 to achieve a tight fit. When supplying gas to the storage bag 1, the gas will not be discharged from the gap between the supply pipe and the fixed pipe 204.

[0030] Furthermore;

[0031] In an alternative embodiment, a rubber sealing pad is fixed to the side surface of the plugging block 207 having a conical structure for strengthening the gap seal between the plugging block 207 and the fixed pipe 204.

[0032] In this embodiment: a rubber sealing pad is provided on the outer surface of the plugging block 207, so that when the plugging block 207 plugs the bottom open end of the fixed pipe 204, the sealing performance between the plugging block 207 and the fixed pipe 204 is better, improving the plugging effect.

[0033] Furthermore;

[0034] In an alternative embodiment, a threaded groove 210 is provided on the inner side wall of the intake pipe 101, and the thread provided on the outside of the housing 203 is threadedly connected to the threaded groove 210 provided on the intake pipe 101. A card slot 211 is provided at the top of the housing 203 for screwing the housing 203 into the inside of the intake pipe 101.

[0035] In this embodiment: since a threaded groove 210 is provided on the inner side wall of the intake pipe 101, it is more convenient to install this plugging structure inside the intake pipe 101, improving the installation efficiency. At the same time, for the card slot 211 provided at the top of the housing 203, an external tool, a flat screwdriver, can be inserted into the card slot 211 when the housing 203 is screwed into the intake pipe 101, making it more convenient to screw the housing 203, further improving the use effect of the device.

[0036] Furthermore;

[0037] In an alternative embodiment, a connecting rope 202 is fixed between the cap 201 and the intake pipe 101.

[0038] In this embodiment: the cap 201 is connected and fixed to the intake pipe 101 through the connecting rope 202, thus effectively preventing the cap 201 from falling off or getting lost, and improving the practicality of the device.

[0039] The working principle and usage process of the present utility model: for this negative pressure storage device for gas collection, when in use, when the equipment supply pipe (not shown in the figure) is inserted into the intake pipe 101, at this time the supply pipe follows the fixed pipe 204 and squeezes the plugging block 207. As the plugging block 207 continuously moves downward, it drives the second annular piece 206 to move downward, and through the second annular piece 206, the spring 208 and the telescopic rod 209 are stretched. At this time, the plugging block 207 is separated from the fixed pipe 204, and the gas is discharged along the exhaust groove (not shown in the figure). Then the gas discharged from the exhaust groove enters through the gap between the plugging block 207 and the fixed pipe 204, and is discharged along the intake pipe 101 into the storage bag 1 to collect the gas;

[0040] When the storage bag 1 has completed the gas collection, when the supply pipe is pulled out from the intake pipe 101, during this process, the spring 208 that is in a stretched state will continuously contract, driving the telescopic rod 209 and the plugging block 207 to continuously reset to plug the port of the fixed pipe 204. When the plugging block 207 plugs the fixed pipe 204, at this time the supply pipe has not completely detached from the fixed pipe 204. Once the supply pipe is removed from the fixed pipe 204, at this time the plugging block 207 has already achieved the plugging operation on the open end of the fixed pipe 204. Subsequently, the cap 201 is used to plug the intake pipe 101. When the supply pipe detaches from the intake pipe 101 of the storage device, it can be preliminarily plugged in time through the plugging block 207, so that the external atmospheric pressure will not cause a small amount of gas inside the storage device to be discharged from the intake pipe 101, which will not affect the gas collection, improve the use effect of the device, and meet the actual use requirements.

[0041] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A negative-pressure storage device for gas collection, comprising a storage bag (1) and an intake pipe (101) fixedly connected to the surface of the storage bag (1), the storage bag (1) and the intake pipe (101) being in communication with each other, characterized in that, A plugging component (2) is installed inside the intake pipe (101); The plugging component (2) includes a housing (203) arranged inside the intake pipe (101), a fixed pipe (204) fixed at the bottom end of the housing (203), and a plugging block (207) arranged at the open bottom of the fixed pipe (204). An expansion rod (209) is arranged between the housing (203) and the plugging block (207), and a spring (208) is arranged on the expansion rod (209). A cap (201) is sleeved on the top of the intake pipe (101), and a plurality of exhaust grooves are formed on the surface of the plugging block (207).

2. The negative pressure storage device for gas collection according to claim 1, wherein: A first annular piece (205) is fixed on the outer surface of the housing (203), a second annular piece (206) is fixed at the bottom end of the plugging block (207), two ends of the expansion rod (209) are respectively fixedly connected with the second annular piece (206) and the first annular piece (205), the spring (208) is wound around the surface of the expansion rod (209), and two ends of the spring (208) are respectively fixedly connected with the second annular piece (206) and the first annular piece (205). The plugging block (207) is designed in a frustum shape.

3. The negative pressure storage device for gas collection according to claim 2, characterized in that: A rubber gasket is fixed on the side of the plugging block (207) with a conical structure to strengthen the gap seal between the plugging block (207) and the fixed pipe (204).

4. The negative pressure storage device for gas collection according to claim 2, characterized in that: Thread grooves (210) are formed on the inner side wall of the intake pipe (101), and the screw teeth arranged outside the housing (203) are in threaded connection with the thread grooves (210) formed in the intake pipe (101).

5. A negative pressure storage device for gas collection according to claim 1, characterized in that: A clamping groove (211) is formed at the top of the housing (203) for screwing the housing (203) into the intake pipe (101).

6. The negative pressure storage device for gas collection according to claim 1, wherein: A connecting rope (202) is fixed between the cap (201) and the intake pipe (101).

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