Exhaust gas recovery device of liquid nitrogen storage tank

Abstract

The utility model relates to the technical field of liquid nitrogen storage tanks, in particular to a liquid nitrogen storage tank exhaust recovery device which is arranged on a liquid nitrogen storage tank with an exhaust port and comprises a recovery tank and a warning device, and the recovery tank is provided with an air inlet, an extraction opening, a storage cavity, a sliding hole and a through hole. The two ends of the air inlet are communicated with the exhaust port and the storage cavity respectively, one end of the sliding hole is communicated with the storage cavity, and the two ends of the through hole are communicated with the end, away from the storage cavity, of the sliding hole and the outside respectively. The colors of the two side faces of the turning plate are different, the piston is arranged in the sliding hole in a sliding mode, one end of the push rod is fixedly connected with the piston, and the other end of the push rod stretches into the penetrating hole. The advantage that maintenance personnel can judge whether the gas storage tank needs to be exhausted or not more visually and conveniently is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of liquid nitrogen storage tanks, and more specifically to an exhaust recovery device for a liquid nitrogen storage tank. Background Art

[0002] Liquid nitrogen storage tanks are mainly used for static storage of liquid nitrogen indoors. When the liquid nitrogen in the liquid nitrogen storage tank vaporizes and expands, the internal pressure of the tank will increase. At this time, part of the gaseous nitrogen must be discharged through the safety valve on the liquid nitrogen storage tank. The liquid nitrogen storage tank exhaust recovery device is a device used to recover this part of the exhausted gaseous nitrogen.

[0003] There is a liquid nitrogen storage tank exhaust recovery device, such as Figure 1 As shown, the apparatus comprises a liquid nitrogen storage tank body 90 and a gas tank 91. The gas tank 91 is in communication with the liquid nitrogen storage tank body 90 and is provided with a pressure gauge 92 for recovering the exhaust nitrogen from the liquid nitrogen storage tank body 90. Since the gas tank 91 is entirely enclosed, routine maintenance personnel can only observe the air pressure in the gas tank 91 through the pressure gauge 92 to determine the nitrogen filling status in the gas tank 91. However, routine maintenance personnel must be close to the pressure gauge 92 to determine the filling status of the exhaust nitrogen in the gas tank 91. In addition, if the pressure gauge 92 alone reflects the air pressure of the gas tank 91, a failure of the pressure gauge 92 may delay timely exhaust of the gas by maintenance personnel.

[0004] Therefore, there is a need to provide a liquid nitrogen storage tank exhaust recovery device that can more intuitively and conveniently determine whether the gas tank needs to be exhausted and reflect the gas pressure situation in the gas tank in multiple forms. Summary of the Invention

[0005] 18. The vent system of claim 17, wherein the venting mechanism is adapted to engage a user with a valve in the vent pipe and guide the valve body to the outlet pipe, wherein the venting mechanism is adapted to engage a user with a valve in the vent pipe.

[0006] Another object of the present application is to provide a liquid nitrogen storage tank exhaust recovery device, wherein the liquid nitrogen storage tank exhaust recovery device also includes a pressure gauge, which is installed on the recovery tank. By combining the pressure gauge and the warning device, the advantage of reflecting the air pressure situation in the gas storage tank in multiple forms is achieved.

[0007] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a liquid nitrogen storage tank exhaust recovery device, which is provided on a liquid nitrogen storage tank, wherein the liquid nitrogen storage tank includes an exhaust port, wherein the liquid nitrogen storage tank exhaust recovery device includes:

[0008] a recovery tank having an air inlet, an air extraction port, a storage chamber, a sliding hole, and a through hole, wherein both ends of the air inlet are respectively connected to the air exhaust port and the storage chamber, one end of the sliding hole is connected to the storage chamber, and both ends of the through hole are respectively connected to an end of the sliding hole away from the storage chamber and the outside world; and

[0009] A warning device, which includes a flap, a piston and a push rod. One side of the flap is rotatably installed on the recovery tank and blocks or exposes the through hole. The colors of the two sides of the flap are different. The piston is slidably set in the sliding hole. One end of the push rod is fixedly connected to the piston, and the other end of the push rod extends into the through hole.

[0010] In one or more embodiments of the present application, the liquid nitrogen storage tank exhaust recovery device further includes a pressure gauge, which is installed on the recovery tank.

[0011] In one or more embodiments of the present application, the warning device further includes a first elastic member, and two ends of the first elastic member respectively abut against the piston and the bottom wall of the sliding hole.

[0012] In one or more embodiments of the present application, the end surface area of ​​one end of the piston facing away from the push rod is larger than the end surface area of ​​the push rod.

[0013] In one or more embodiments of the present application, a magnet is provided on a side of the flap close to the sliding block, and the magnet is attracted to the tank body of the recovery tank.

[0014] In one or more embodiments of the present application, the exhaust port has a first exhaust channel and a second exhaust channel, and the liquid nitrogen storage tank further includes a one-way valve, which is arranged at the connection point between the first exhaust channel and the second exhaust channel.

[0015] In one or more embodiments of the present application, the one-way valve includes a ball core and a second elastic member, the two ends of the second elastic member are fixedly connected to the ball core and the liquid nitrogen storage tank respectively, and the ball core blocks the connection between the first exhaust channel and the second exhaust channel.

[0016] In one or more embodiments of the present application, a normally open valve is provided on the air inlet.

[0017] In an embodiment of the present application, a liquid nitrogen storage tank exhaust recovery device is provided on the liquid nitrogen storage tank, and the liquid nitrogen storage tank includes an exhaust port, wherein the liquid nitrogen storage tank exhaust recovery device includes a recovery tank and a warning device, the recovery tank has an air inlet, an air extraction port, a storage chamber, a sliding hole and a through hole, the two ends of the air inlet are respectively connected with the exhaust port and the storage chamber, one end of the sliding hole is connected with the storage chamber, and the two ends of the through hole are respectively connected with the end of the sliding hole away from the storage chamber and the outside world, the warning device includes a flap, a piston and a push rod, one side of the flap is rotatably installed in the recovery tank and blocks or exposes the through hole, the colors of the two sides of the flap are different, the piston is slidably arranged in the sliding hole, one end of the push rod is fixedly connected to the piston, and the other end of the push rod extends into the through hole. When the air pressure in the storage chamber is too high, the piston actuates and overturns the flap to the other side, so that maintenance personnel can more intuitively and conveniently judge whether the gas tank needs to be exhausted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] These and / or other aspects and advantages of the present application will become more clear and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0019] Figure 1 The figure shows a schematic structural diagram of an existing liquid nitrogen storage tank exhaust recovery device installed on a liquid nitrogen storage tank;

[0020] Figure 2 The figure shows a schematic structural diagram of a liquid nitrogen storage tank exhaust recovery device installed on a liquid nitrogen storage tank in the present application;

[0021] Figure 3 Pictured Figure 2 A partial enlarged view of point C. DETAILED DESCRIPTION

[0022] The terms and words used in the following description and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0023] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0024] Although ordinal numbers such as "first," "second," and the like will be used to describe various components, these are not intended to limit those components. The terms are used solely to distinguish one component from another. For example, a first component could be referred to as a second component, and similarly, a second component could be referred to as a first component without departing from the teachings of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] The terms used herein are for the purpose of describing various embodiments only and are not intended to be limiting. As used herein, the singular is intended to include the plural, unless the context clearly indicates otherwise. It will also be understood that the terms "comprising" and / or "having" when used in this specification specify the presence of a stated feature, number, step, operation, component, element, or combination thereof, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

[0026] Schematic liquid nitrogen storage tank exhaust recovery device, reference Figures 2 to 3 According to a preferred embodiment of the present invention, a liquid nitrogen storage tank exhaust recovery device is provided on a liquid nitrogen storage tank 10. The liquid nitrogen storage tank 10 includes an inner chamber 101, an insulation layer 102, an outer shell 103 and an exhaust port 104. The exhaust port 104 is connected to the inner chamber 101. Liquid nitrogen is stored in the inner chamber 101. The exhaust port 104 has a first exhaust channel 1041 and a second exhaust channel 1042. The liquid nitrogen storage tank 10 also includes a one-way valve 105. The one-way valve 105 is provided at the connection between the first exhaust channel 1041 and the second exhaust channel 1042. Specifically, the one-way valve 105 includes a ball core 1051 and a second elastic member 1052. The second exhaust channel 1042 has a supporting portion 1043. The two ends of the second elastic member 1052 are respectively fixedly connected to the ball core 1051 and the supporting portion 1043 of the liquid nitrogen storage tank 10. The fixed connection method includes but is not limited to welding. The ball core 1051 blocks the connection between the first exhaust channel 1041 and the second exhaust channel 1042.

[0027] It should be noted that when the liquid nitrogen in the inner cavity 101 is vaporized and causes the air pressure in the inner cavity 101 to be too high, the gas will push the ball core 1051 to move away from the liquid nitrogen storage tank 10 and no longer block the connection between the first exhaust channel 1041 and the second exhaust channel 1042. At this time, the vaporized nitrogen in the inner cavity 101 can be discharged along the exhaust port 104 and flow to the exhaust recovery device of the liquid nitrogen storage tank 10.

[0028] Furthermore, if Figure 2 As shown, the liquid nitrogen storage tank exhaust recovery device includes a recovery tank 20, which has an air inlet 201, an air extraction port 202 and a storage chamber 203. The two ends of the air inlet 201 are respectively connected to the exhaust port 104 and the storage chamber 203.

[0029] It should be noted that the vaporized nitrogen flows along the exhaust port 104 through the air inlet 201 and flows into the storage chamber 203. It should also be noted that the storage chamber 203 is initially in a vacuum state. Therefore, under the action of the air pressure difference, the vaporized nitrogen flowing into the second exhaust channel 1042 will flow into the storage chamber 203. In addition, by providing the air extraction port 202, the prerequisites are provided for discharging the nitrogen after filling the storage chamber 203 with nitrogen and for evacuating the storage chamber 203.

[0030] Furthermore, if Figure 3 As shown, the recovery tank 20 has a sliding hole 204 and a through hole 205, one end of the sliding hole 204 is communicated with the storage chamber 203, and the two ends of the through hole 205 are respectively communicated with the end of the sliding hole 204 away from the storage chamber 203 and the outside world; in addition, the liquid nitrogen storage tank exhaust recovery device also includes a warning device 30, and the warning device 30 includes a flap 301, a piston 302 and a push rod 303, one side of the flap 301 is rotatably mounted on the recovery tank 20 and blocks or exposes the through hole 205, the colors of the two sides of the flap 301 are different, the piston 302 is slidably set in the sliding hole 204, one end of the push rod 303 is fixedly connected to the piston 302, and the other end of the push rod 303 extends into the through hole 205.

[0031] It should be noted that the side of the flap 301 facing away from the through hole 205 is green, and the side of the flap 301 close to the through hole 205 is red. Under normal circumstances, the flap 301 blocks the through hole 205. When routine maintenance personnel look at the recovery tank 20 from a distance, they can see that the flap 301 is green, which means that the air pressure in the recovery tank 20 is still within the preset pressure value. When the flap 301 is red, it means that the air pressure in the recovery tank 20 has exceeded the preset pressure value and needs to be exhausted in time. It should also be noted that, since the storage chamber 203 is initially in a vacuum state, the air pressure in the storage chamber 203 is zero at this time, and the air pressure in the through hole 205 between the end of the push rod 303 and the flap 301 is a value A. As the gasified nitrogen flows into the storage chamber 203, the air pressure in the storage chamber 203 increases, and at a certain moment is greater than the value A, the piston 302 will be subjected to a thrust, and as the air pressure in the storage chamber 203 further increases, the piston 302 moves toward the flap 301, and drives the push rod 303 to move toward the flap 301, and at a certain moment contacts the flap 301. After receiving the thrust, the flap 301 flips in the direction away from the side wall of the recovery tank 20, and flips 180° under the action of gravity, revealing the red side.

[0032] In addition, in the embodiments of the present application, Figure 2 As shown, the liquid nitrogen storage tank exhaust recovery device also includes a pressure gauge 40, and the pressure gauge 40 is installed on the recovery tank 20. When the daily maintenance personnel sees that the flap 301 is red, they can walk in and confirm the value on the pressure gauge 40. If the value of the pressure gauge 40 also exceeds the rated air pressure value, the recovery tank 20 should be exhausted in time. In addition, when the flap 301 is green and the pressure gauge 40 exceeds the rated air pressure value, the daily maintenance personnel should inspect the warning device 30 and the pressure gauge 40 separately, and replace the parts with errors in time. It is obvious that compared with the prior art in which only the pressure gauge is installed on the recovery tank 20, the daily maintenance personnel need to walk in and observe the value on the pressure gauge every time. The embodiment of the present application has the advantages of more intuitively and conveniently judging whether the gas tank needs to be exhausted and reflecting the air pressure situation in the gas tank in multiple forms.

[0033] Furthermore, in order to adjust the resistance at the piston 302, the piston 302 can just overturn the flap 301 after the air pressure in the recovery tank 20 reaches a predetermined value. Figure 3As shown, the warning device 30 further includes a first elastic member 304, the ends of which respectively abut against the piston 302 and the bottom wall of the sliding hole 204. The first elastic member 304 is a spring. In addition, the end surface area of ​​the piston 302 facing away from the push rod 303 is larger than the end surface area of ​​the push rod 303.

[0034] Furthermore, in order to enable the flap 301 to block the through hole 205 in a normal state, a magnet (not shown) is provided on a side of the flap 301 close to the sliding block. The magnet is embedded in the flap 301 and is attracted to the body of the recovery tank 20. The push rod 303 is preferably made of plastic.

[0035] Further, if Figure 2 As shown, a normally open valve 2011 is provided on the air inlet 201. The normally open valve 2011 is normally open and does not affect the flow of nitrogen discharged from the liquid nitrogen storage tank 10 into the recovery tank 20. When the recovery tank 20 needs to be vented, the routine maintenance personnel closes the normally open valve 2011 and then vents the recovery tank 20.

[0036] In summary, the liquid nitrogen storage tank exhaust recovery device based on the embodiment of the present application is explained, which provides the liquid nitrogen storage tank exhaust recovery device with advantages such as more intuitive and convenient judgment of whether the gas tank needs to be exhausted and multiple forms of reflection of the gas pressure conditions in the gas tank.

[0037] It is worth mentioning that in the embodiments of the present application, the liquid nitrogen storage tank exhaust recovery device has a simple structure, does not involve complex manufacturing processes and expensive materials, and is highly economical. Furthermore, for manufacturers, the liquid nitrogen storage tank exhaust recovery device provided in the present application is easy to produce and low in cost, which is more conducive to controlling production costs and further facilitating product promotion and use.

[0038] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from these principles.

Claims

1. A liquid nitrogen storage tank exhaust recovery device, provided on a liquid nitrogen storage tank, wherein the liquid nitrogen storage tank includes an exhaust port, characterized in that: The liquid nitrogen storage tank exhaust recovery device includes a recovery tank, the recovery tank having an air inlet, an air extraction port, a storage chamber, a sliding hole, and a through hole, the two ends of the air inlet being respectively connected to the air exhaust port and the storage chamber, one end of the sliding hole being connected to the storage chamber, and the two ends of the through hole being respectively connected to an end of the sliding hole away from the storage chamber and the outside; as well as A warning device, which includes a flap, a piston and a push rod. One side of the flap is rotatably installed on the recovery tank and blocks or exposes the through hole. The colors of the two sides of the flap are different. The piston is slidably set in the sliding hole. One end of the push rod is fixedly connected to the piston, and the other end of the push rod extends into the through hole.

2. The liquid nitrogen storage tank exhaust recovery device according to claim 1, characterized in that: The liquid nitrogen storage tank exhaust recovery device further includes a pressure gauge, which is installed on the recovery tank.

3. The liquid nitrogen storage tank exhaust recovery device according to claim 2, characterized in that: The warning device further includes a first elastic member, two ends of which respectively abut against the piston and the bottom wall of the sliding hole.

4. The liquid nitrogen storage tank exhaust recovery device according to claim 3, characterized in that: The end surface area of ​​one end of the piston facing away from the push rod is larger than the end surface area of ​​the push rod.

5. The liquid nitrogen storage tank exhaust recovery device according to claim 4, characterized in that: A magnet is provided on one side of the flap close to the sliding block, and the magnet is attracted to the tank body of the recovery tank.

6. The liquid nitrogen storage tank exhaust recovery device according to any one of claims 1 to 5, characterized in that: The exhaust port has a first exhaust channel and a second exhaust channel. The liquid nitrogen storage tank further includes a one-way valve, which is arranged at the connection point between the first exhaust channel and the second exhaust channel.

7. The liquid nitrogen storage tank exhaust recovery device according to claim 6, characterized in that: The one-way valve includes a ball core and a second elastic member. Two ends of the second elastic member are fixedly connected to the ball core and the liquid nitrogen storage tank respectively. The ball core blocks the connection between the first exhaust channel and the second exhaust channel.

8. The liquid nitrogen storage tank exhaust recovery device according to claim 7, characterized in that: A normally open valve is provided on the air inlet.

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