A nitrogen multi-stage buffer tank with adjustable pressure and its usage method

Abstract

The present invention provides a nitrogen multi-stage buffer tank with adjustable pressure and a usage method, belonging to the technical field of buffer tanks. It includes a buffer tank body with an air inlet at the bottom end and an air outlet at the upper end, a plurality of pressure regulating tanks circumferentially distributed along the outer wall of the buffer tank body, an intelligent pressure regulating component arranged in the pressure regulating tank, and a constant pressure buffer component connected to the buffer tank body; the air inlet of the nitrogen buffer tank of the present invention is connected with a constant pressure buffer component. After nitrogen enters the constant pressure regulating box, through the up and down movement of the constant pressure regulating plate, the internal volume of the lower constant pressure chamber changes, so as to achieve the purpose of constant pressure buffering of nitrogen. A plurality of pressure regulating tanks are arranged around the buffer tank body. When the pressure in the buffer tank body is too high, on the basis of the preliminary pressure regulation of the constant pressure buffer component, through the setting of the pressure reduction regulating part and the pressure increase regulating part, the nitrogen entering the buffer tank is subjected to constant pressure regulation and multi-stage buffering, ensuring that the nitrogen is always stably input and improving the buffering effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of buffer tanks, and specifically relates to a nitrogen multi-stage buffer tank with adjustable pressure and a usage method thereof. Background Art

[0002] Buffer tanks are mainly used to buffer the pressure fluctuations in various systems, making the system work more smoothly. The buffering performance of buffer tanks is mainly achieved by compressing the compressed air in the tank. There are two types of buffer tanks: diaphragm buffer tanks and airbag buffer tanks, which are widely used in water supply equipment, central air-conditioning systems and other things. Buffer tanks are important auxiliary equipment for reciprocating pumps, used to reduce the flow unevenness in pipelines. They are divided into two types: suction buffer tanks and discharge buffer tanks. The function of the suction buffer tank is to reduce the flow unevenness in the suction pipeline, reduce the inertial loss, and improve the suction performance of the pump. The function of the discharge buffer tank is to reduce the flow unevenness in the discharge pipeline and avoid the generation of over-flow to meet the needs of the technological process. The structural forms of buffer tanks are divided into two categories: direct contact type and diaphragm type. Among them, as a kind of inert gas, nitrogen produced by nitrogen generators is a mixture of nitrogen with different purities. At the beginning and end stages of the nitrogen production process, the purity of the produced nitrogen is not as high as that of the nitrogen produced in the intermediate stage. In order to prevent fluctuations in nitrogen purity, most nitrogen generators are equipped with nitrogen buffer tanks, which can output nitrogen purity in a stable state. Moreover, when producing large-flow nitrogen using PSA technology, the nitrogen gas flow will generate pulses or fluctuations. In order to ensure that the backend application can obtain a stable and uninterrupted nitrogen gas flow, this nitrogen gas will be collected in the buffer tank for pressure stabilization.

[0003] When the existing nitrogen buffer tank is in use, it does not have the function of multi-stage pressure regulation, which makes nitrogen unable to enter the tank body smoothly, greatly reducing the buffering effect of nitrogen. Therefore, there is an urgent need for a nitrogen multi-stage buffer tank with adjustable pressure. Summary of the Invention

[0004] In view of the above problems, the present invention provides a nitrogen multi-stage buffer tank with adjustable pressure and a usage method thereof.

[0005] The technical solution of the present invention is: a nitrogen multi-stage buffer tank with adjustable pressure, including a buffer tank body with an air inlet at the bottom end and an air outlet at the upper end, a plurality of pressure regulating tanks circumferentially distributed along the outer wall of the buffer tank body, an intelligent pressure regulating component arranged in the pressure regulating tank, and a constant pressure buffer component connected to the buffer tank body;

[0006] Communication ports are provided on the side wall of the buffer tank body corresponding to the positions of each pressure regulating tank. Inflation ports are provided at the upper ends of each pressure regulating tank. Each of the inflation ports is connected to an air extraction pump through a connecting pipe, and a pressure gauge is provided at the connection;

[0007] The intelligent pressure regulating component includes a pressure reducing regulating member provided on the inner wall of the buffer tank and corresponding to each pressure regulating tank, and a pressure increasing regulating member provided in each pressure regulating tank. The pressure reducing regulating member includes a regulating port provided on the inner wall of the buffer tank, a first regulating installation box provided on the inner wall of the buffer tank and located at the regulating port, a second regulating installation box clamped at the center of the first regulating installation box and communicating with each other on the left and right sides, two splicing regulating plates provided in the second regulating installation box and located at the regulating port, and a pushing baffle connected to the two regulating plates through a spring pressing rod. Elastic compression sleeves are provided on the upper and lower sides of the second regulating installation box and inside the first regulating installation box, and a plurality of pressure reducing holes are evenly provided on the outer wall of the elastic compression sleeve. The two regulating plates are respectively connected to the inside of the corresponding elastic compression sleeve through connecting rods, and the two regulating plates can slide up and down along the inner wall of the second regulating installation box. The pressure increasing regulating member includes a pressure increasing airbag provided in the pressure regulating tank and connected to the inflation port;

[0008] The constant pressure buffer component includes a constant pressure regulating box connected to the air inlet, U-shaped frames symmetrically distributed on the left and right sides inside the constant pressure regulating box, and a constant pressure regulating plate provided in the constant pressure regulating box and whose side wall can slide up and down along the inside of the U-shaped frame. The constant pressure regulating plate divides the inside of the constant pressure regulating box into an upper installation cavity and a lower constant pressure cavity. Upper trigger blocks and lower trigger blocks are respectively provided at the upper and lower ends of the constant pressure regulating plate, and upper trigger buttons and lower trigger buttons are provided at the upper and lower ends of the U-shaped frame.

[0009] Further, a one-way air inlet component is provided at the communication port. The one-way air inlet component includes a plurality of blocking valve flaps arranged along the inner wall of the communication port, and a sealing rubber strip is provided between adjacent two of the blocking valve flaps. One end of each blocking valve flap is hinged to the inner wall of the communication port and the other end gathers towards the side of the buffer tank body.

[0010] Note: By setting each blocking valve flap into a one-way ventilation structure, while ensuring that the nitrogen in the pressure regulating tank enters the buffer tank body, it achieves the effect of increasing pressure and improves the reliability of the device operation.

[0011] Further, a plurality of limiting and fixing rings are evenly provided in the pressure regulating tank from top to bottom. The pressure increasing airbag passes through each of the limiting and fixing rings in the vertical direction, and a soft rubber ring is provided on the inner wall of the limiting and fixing ring. The upper end of the pressure increasing airbag is connected to the inflation port through a ventilation pipe, and the lower end of the pressure increasing airbag is connected to the inner wall of the pressure regulating tank through a connecting column.

[0012] Note: The stability of the installation of the pressure increasing airbag is increased through the limiting and fixing rings, avoiding loosening of the connection between the pressure increasing airbag and the inflation port under the impact of air pressure when the pressure increasing airbag inflates or deflates, resulting in the dropping of the pressure increasing airbag, and improving the reliability of the device operation.

[0013] Further, sliding grooves are provided on the left and right sides inside the constant pressure regulating box, and spring columns connected to the bottom end of the constant pressure regulating plate are provided at the bottom ends of the sliding grooves. The constant pressure regulating plate is slidably connected to the sliding grooves. Inside the upper installation cavity and directly above the constant pressure regulating plate, an inverted U-shaped installation plate is connected, an electromagnetic chuck is provided inside the inverted U-shaped installation plate, an electric telescopic rod is provided between the inverted U-shaped installation plate and the installation cavity, a clamping placement plate is provided at the upper end of the constant pressure regulating plate, and a metal gravity block that can be placed inside the clamping placement plate.

[0014] Explanation: After nitrogen enters the constant pressure regulating box, it flows out through the lower constant pressure cavity. During the process of nitrogen flowing through the lower constant pressure cavity, when the nitrogen pressure is too high, the constant pressure regulating plate will slide upward in the sliding groove under the action of air pressure, and the spring column will be stretched. When the upper trigger block contacts the upper trigger button, that is, the pressure in the lower constant pressure cavity is too high. At this time, while closing the air flow inlet, the pressure relief valve is opened to relieve pressure until the upper trigger block separates from the upper trigger button. When the nitrogen pressure is too low, the constant pressure regulating plate will slide downward in the sliding groove under the action of air pressure, and the spring column will be compressed. When the lower trigger block contacts the lower trigger button, that is, the pressure in the lower constant pressure cavity is too low. At this time, the flow rate of nitrogen is increased. This structure of the present invention can ensure that the nitrogen gas flow smoothly flows into the buffer tank body, thereby performing preliminary buffering on the nitrogen. Compared with controlling the nitrogen gas flow rate by the opening and closing size of the valve, it can always maintain a constant pressure input of the gas flow, and has a good buffering effect.

[0015] Further, a plurality of buffer mesh plates are evenly provided inside the buffer tank body from top to bottom, and each of the buffer mesh plates is a detachable structure.

[0016] Explanation: The nitrogen is secondarily buffered by the buffer mesh plates, greatly increasing the buffering effect, and the buffer mesh plates are detachable, facilitating their installation and disassembly.

[0017] Further, a gas filtration and purification component is connected to the air inlet. The gas filtration and purification component includes a filtration installation box connected to the air inlet through a connecting pipe and having an air flow inlet on its side wall, three through installation ports provided at the upper end of the filtration installation box, and filter plates inserted into the through installation ports and having a plugging cover plate at the upper end for plugging the through installation ports. The three filter plates are a filter mesh plate, a moisture-absorbing filter mesh plate, and a drying mesh respectively.

[0018] Explanation: The nitrogen is respectively filtered, moisture-absorbed, and dried by the filter mesh plate, the moisture-absorbing filter mesh plate, and the drying mesh, preventing impurities in the nitrogen from entering the buffer tank body and increasing the cleaning difficulty of the buffer tank body. At the same time, it can also keep the inside of the buffer tank body dry and reduce the filtration pressure of the subsequent filtration component. The filter plates are arranged in a plug-in manner, increasing the convenience of disassembly and installation.

[0019] Furthermore, a pull handle is provided at the upper end of the plugging cover plate, and a sealing ring is provided on the outer wall of the plugging cover plate.

[0020] Explanation: By providing the pull handle, it is convenient to extract the filter plate, increasing the convenience of disassembly and installation. By providing the sealing ring, the sealing performance of each filter plate installation is increased, avoiding nitrogen leakage and improving the operational reliability of the device.

[0021] Further, it further includes a fixed support frame. The fixed support frame includes a main fixed ring clamped to the bottom end of the buffer tank body, a secondary fixed ring connected to the main fixed ring and corresponding to each pressure regulating tank one by one, and a plurality of support legs provided at the bottom ends of the main fixed ring and the secondary fixed ring. The main fixed ring and the secondary fixed ring are connected to each other.

[0022] Explanation: By supporting the buffer tank body and the pressure regulating tank with the fixed support frame, the installation stability of the buffer tank is improved.

[0023] The present invention also discloses a usage method of a nitrogen multi-stage buffer tank with adjustable pressure, including the following steps:

[0024] S1. First, nitrogen enters the filter installation box through the air flow inlet, and sequentially passes through the filter mesh plate, the moisture absorption filter mesh plate, and the drying mesh to respectively filter, absorb moisture, and dry the nitrogen. The treated nitrogen flows into the constant pressure regulation box through the connecting pipe;

[0025] S2. Secondly, after the nitrogen enters the constant pressure regulation box, it flows out through the lower constant pressure chamber. During the process of the nitrogen flowing through the lower constant pressure chamber, when the nitrogen pressure is too high, the constant pressure regulation plate will slide upward in the sliding groove under the action of the air pressure, and the spring column will be stretched. When the upper trigger block contacts the upper trigger button, that is, the pressure in the lower constant pressure chamber is too high. At this time, while closing the air flow inlet, the pressure relief valve is opened to relieve the pressure. At the same time, through the extension of the electric telescopic rod, the inverted U-shaped installation disk moves downward, and the electromagnetic chuck is powered off, so that the metal gravity block falls into the clamping placement disk, accelerating the downward movement of the constant pressure regulation plate until the upper trigger block separates from the upper trigger button. When the nitrogen pressure is too low, the constant pressure regulation plate will slide downward in the sliding groove under the action of the air pressure, and the spring column will be compressed. When the lower trigger block contacts the lower trigger button, that is, the pressure in the lower constant pressure chamber is too low. At this time, the flow rate of the nitrogen is increased;

[0026] S3. Then, after the nitrogen flows out of the constant pressure regulating box, it enters the bottom of the buffer tank through the air inlet. When the nitrogen flows from bottom to top, it is buffered by each buffer mesh plate and flows out through the air outlet. As the nitrogen gathers inside the buffer tank and the discharge rate is limited, when the pressure inside the buffer tank is too high, the nitrogen will enter the second regulating installation box. When the nitrogen pressure is large enough and the push baffle moves close to the regulating port, at this time, the two spring extrusion rods are compressed, pushing the two regulating plates away from each other, so that the regulating port is opened, and the nitrogen enters each pressure regulating tank through the regulating port for pressure relief. As the two regulating plates move away from each other, the connecting rod will open the elastic compression sleeve, so that part of the nitrogen will flow back into the buffer tank through the pressure reducing hole, so as to avoid the nitrogen outflow rate being too fast.

[0027] S4. Finally, when the internal pressure of the buffer tank is too low, start the vacuum pump and use it to draw external air into the booster airbag. As the booster airbag expands, the air pressure in each pressure regulating tank increases, and the nitrogen passes through each connecting port and opens each sealing valve flap, enters the buffer tank to replenish its pressure, until the nitrogen in the buffer tank is smoothly output through the outlet.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] The air inlet of the nitrogen buffer tank of the present invention is connected with a constant pressure buffer assembly. After the nitrogen enters the constant pressure regulating box, the constant pressure regulating plate moves up and down, causing the internal volume of the lower constant pressure chamber to change, thereby achieving the purpose of constant pressure buffering of the nitrogen, reducing the pressure fluctuation of the air, and improving the buffering effect. At the same time, the metal gravity block can accelerate the movement of the constant pressure regulating plate, greatly improving the pressure relief rate in the lower constant pressure chamber, and shortening the adjustment time.

[0030] The present invention arranges a plurality of pressure regulating tanks on the periphery of the buffer tank body. When the pressure in the buffer tank body is too large, on the basis of the initial pressure regulation of the constant pressure buffer assembly, the push baffle is moved toward the regulating port by the gas pressure of the nitrogen. At this time, the two spring extrusion rods are compressed, pushing the two regulating plates away from each other, so that the regulating port is opened, and the nitrogen enters each pressure regulating tank through the regulating port for pressure relief, so that the pressure in the buffer tank body is regulated. On the contrary, when the pressure inside the buffer tank body is too small, the air suction pump is started, and the air suction pump is used to pump external air into the boosting airbag. As the boosting airbag expands, the air pressure in each pressure regulating tank increases, and the nitrogen passes through each connecting port and opens each blocking valve flap, enters the buffer tank body and replenishes the pressure thereon, until the nitrogen in the buffer tank body is stably output through the gas outlet. The above process regulates the pressure of the nitrogen entering the pressure regulating tank twice, so as to ensure that the nitrogen gas flow flows smoothly into the buffer tank body. Compared with the opening and closing size of the valve, the nitrogen gas flow rate is controlled, and the constant pressure input of the gas flow can be always maintained.

[0031] Under the combined action of the pressure reduction regulating member, the pressure increase regulating member, and the constant pressure buffer assembly of the present invention, the nitrogen entering the interior of the buffer tank is regulated at a constant pressure and buffered in multiple stages, ensuring a stable input of nitrogen at all times and improving the buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0033] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0034] Figure 3 is of the present invention Figure 2 enlarged view of part A in;

[0035] Figure 4 is a top view of the limit fixing ring of the present invention;

[0036] Figure 5 is a schematic diagram of the internal structure of the constant pressure regulating box of the present invention;

[0037] Figure 6 is a schematic diagram of the structure when the plug valve flap is opened of the present invention;

[0038] Figure 7 is a schematic diagram of the structure when the plug valve flaps are gathered of the present invention.

[0039] Among them, 1 - buffer tank body, 10 - air inlet, 11 - air outlet, 12 - communication port, 13 - one - way air intake component, 130 - plugging valve flap, 131 - sealing rubber strip, 14 - buffer mesh plate, 15 - gas filtration and purification component, 150 - filtration installation box, 1500 - air flow inlet, 151 - through - installation port, 152 - filter plate, 1520 - plugging cover plate, 1521 - filter mesh plate, 1522 - moisture - absorbing filter mesh plate, 1523 - drying net, 1524 - pull - out handle, 1525 - sealing ring, 2 - pressure - regulating tank, 20 - inflation port, 21 - air extraction pump, 210 - pressure gauge, 22 - limit fixing ring, 220 - soft rubber ring, 3 - intelligent pressure - regulating component, 30 - adjustment port, 31 - first adjustment installation box, 32 - second adjustment installation box, 320 - elastic compression sleeve, 321 - pressure - reducing hole, 33 - adjustment plate, 330 - connecting rod, 34 - pushing baffle, 340 - spring extrusion rod, 35 - pressurizing airbag, 350 - connecting column, 4 - constant - pressure buffer component, 40 - constant - pressure adjustment box, 400 - upper installation cavity, 401 - lower constant - pressure cavity, 402 - inverted U - shaped installation plate, 403 - electromagnetic chuck, 404 - electric telescopic rod, 405 - clamping placement plate, 406 - metal gravity block, 41 - U - shaped frame, 410 - upper trigger button, 411 - lower trigger button, 42 - constant - pressure adjustment plate, 420 - upper trigger block, 421 - lower trigger block, 43 - sliding groove, 430 - spring column, 5 - fixed support frame, 50 - main fixing ring, 51 - sub - fixing ring, 52 - support leg. Detailed implementation mode

[0040] In order to further understand the content of the present invention, the following provides a detailed description of the present invention through embodiments. Embodiment

[0041] As Figure 1 、 2 shown, a nitrogen multi - stage buffer tank with adjustable pressure includes a buffer tank body 1 with an air inlet 10 at the bottom end and an air outlet 11 at the upper end, 4 pressure - regulating tanks 2 circumferentially distributed along the outer wall of the buffer tank body 1, an intelligent pressure - regulating component 3 arranged in the pressure - regulating tank 2, and a constant - pressure buffer component 4 connected to the buffer tank body 1;

[0042] A communication port 12 is provided on the side wall of the buffer tank body 1 corresponding to each pressure - regulating tank 2, an inflation port 20 is provided at the upper end of each pressure - regulating tank 2, an air extraction pump 21 is connected to each inflation port 20 through a connecting pipe, and a pressure gauge 210 is provided at the connection;

[0043] As Figure 3As shown in the figure, the intelligent voltage regulating component 3 includes a voltage reducing and regulating member provided on the inner wall of the buffer tank body 1 corresponding to the position of each voltage regulating tank 2, and a pressure increasing and regulating member provided in each voltage regulating tank 2. The voltage reducing and regulating member includes an adjusting port 30 provided on the inner wall of the buffer tank body 1, a first adjusting mounting box 31 provided on the inner wall of the buffer tank body 1 and located at the adjusting port 30, a second adjusting mounting box 32 clamped at the center of the first adjusting mounting box 31 and communicating with each other on the left and right sides, two mutually spliced adjusting plates 33 provided in the second adjusting mounting box 32 and located at the adjusting port 30, and a pushing baffle 34 connected to the two adjusting plates 33 through a spring pressing rod 340. Elastic compression sleeves 320 are provided on the upper and lower sides of the second adjusting mounting box 32 and inside the first adjusting mounting box 31, and 20 pressure reducing holes 321 are evenly provided on the outer wall of the elastic compression sleeve 320. The two adjusting plates 33 are respectively connected to the inside of the corresponding elastic compression sleeve 320 through connecting rods 330, and the two adjusting plates 33 can respectively slide up and down along the inner wall of the second adjusting mounting box 32. The pressure increasing and regulating member includes a pressure increasing air bag 35 provided in the voltage regulating tank 2 and connected to the inflation port 20;

[0044] As Figure 2 , 5 As shown in the figure, the constant pressure buffer component 4 includes a constant pressure regulating box 40 connected to the air inlet 10, U-shaped frames 41 symmetrically distributed on the left and right sides inside the constant pressure regulating box 40, and a constant pressure regulating plate 42 provided in the constant pressure regulating box 40 and the side wall of which can slide up and down along the inside of the U-shaped frame 41. The constant pressure regulating plate 42 divides the inside of the constant pressure regulating box 40 into an upper mounting cavity 400 and a lower constant pressure cavity 401. Upper trigger blocks 420 and lower trigger blocks 421 are respectively provided at the upper and lower ends of the constant pressure regulating plate 42, upper trigger buttons 410 and lower trigger buttons 411 are provided at the upper and lower ends of the U-shaped frame 41, and a pressure relief valve 4010 is provided on the side wall of the lower constant pressure cavity 401;

[0045] A sliding groove 43 is provided inside the U-shaped frame 41, and a spring column 430 connected to the bottom end of the constant pressure regulating plate 42 is provided at the bottom end of the sliding groove 43. The constant pressure regulating plate 42 is slidably connected to the sliding groove 43. An inverted U-shaped mounting plate 402 is connected at the upper end of the constant pressure regulating plate 42 in the upper mounting cavity 400, an electromagnetic chuck 403 is provided inside the inverted U-shaped mounting plate 402, an electric telescopic rod 404 is provided between the inverted U-shaped mounting plate 402 and the mounting cavity 400, a clamping placement plate 405 is provided at the upper end of the constant pressure regulating plate 42, and a metal gravity block 406 that can be placed inside the clamping placement plate 405;

[0046] Two buffer mesh plates 14 are evenly provided inside the buffer tank body 1 from top to bottom, and each buffer mesh plate 14 is a detachable structure;

[0047] Among them, the air extraction pump 21, the pressure gauge 210, the upper trigger button 410, the lower trigger button 411, the pressure relief valve 4010, the electromagnetic chuck 403, and the electric telescopic rod 404 all adopt existing technologies. Example

[0048] The difference between this example and Example 1 is that:

[0049] As Figure 6 、 7 shown, the communication port 12 is provided with a one-way air intake component 13. The one-way air intake component 13 includes 4 blocking valve flaps 130 arranged along the inner wall of the communication port 12, and a sealing rubber strip 131 is arranged between adjacent two blocking valve flaps 130. One end of each blocking valve flap 130 is hinged to the inner wall of the communication port 12 and the other end converges towards the side close to the buffer tank body 1. Example

[0050] The difference between this example and Example 2 is that:

[0051] As Figure 2 、 4 shown, two limiting and fixing rings 22 are evenly arranged inside the pressure regulating tank 2 from top to bottom. The pressurizing air bag 35 passes through each limiting and fixing ring 22 in the vertical direction, and a soft rubber ring 220 is arranged on the inner wall of the limiting and fixing ring 22. The upper end of the pressurizing air bag 35 is connected to the inflation port 20 through an air pipe, and the lower end of the pressurizing air bag 35 is connected to the inner wall of the pressure regulating tank 2 through a connecting column 350. Example

[0052] The difference between this example and Example 3 is that:

[0053] As Figure 1 、 2 shown, a gas filtration and purification component 15 is connected to the air inlet 10. The gas filtration and purification component 15 includes a filtration installation box 150 connected to the air inlet 10 through a connecting pipe and having an air flow inlet 1500 on the side wall, three through installation ports 151 arranged at the upper end of the filtration installation box 150, and a filter plate 152 inserted into the through installation ports 151 and having a blocking cover plate 1520 at the upper end for blocking the through installation ports 151. The three filter plates 152 are respectively a filter mesh plate 1521, a moisture absorption filter mesh plate 1522, and a drying mesh 1523;

[0054] A pull handle 1524 is arranged at the upper end of the blocking cover plate 1520, and a sealing ring 1525 is arranged on the outer wall of the blocking cover plate 1520;

[0055] Among them, the filter mesh plate 1521, the moisture absorption filter mesh plate 1522, and the drying mesh 1523 adopt the prior art. Example

[0056] The difference between this example and Example 4 is that:

[0057] As Figure 1As shown, it further includes a fixed support frame 5. The fixed support frame 5 includes a main fixing ring 50 clamped to the bottom end of the buffer tank body 1, a secondary fixing ring 51 connected to the main fixing ring 50 and corresponding to the pressure regulating tank 2 one by one, and a plurality of support legs 52 provided at the bottom ends of the main fixing ring 50 and the secondary fixing ring 51. The main fixing ring 50 and the secondary fixing ring 51 are connected to each other. Embodiment

[0058] The difference between this embodiment and Embodiment 5 is as follows:

[0059] Embodiment 6 discloses a method for using a nitrogen multi-stage buffer tank with adjustable pressure, including the following steps:

[0060] S1. First, nitrogen enters the filter installation box 150 through the air flow inlet 1500, and successively passes through the filter mesh plate 1521, the moisture absorption filter mesh plate 1522, and the drying mesh 1523 to respectively filter, absorb moisture, and dry the nitrogen. The treated nitrogen flows into the constant pressure regulation box 40 through the connecting pipe;

[0061] S2. Second, after the nitrogen enters the constant pressure regulation box 40, it flows out through the lower constant pressure chamber 401. During the process of the nitrogen flowing through the lower constant pressure chamber 401, when the nitrogen pressure is too high, the constant pressure regulation plate 42 will slide upward in the sliding groove 43 under the action of the air pressure, and the spring column 430 will be stretched. When the upper trigger block 420 contacts the upper trigger button 410, that is, the pressure in the lower constant pressure chamber 401 is too high. At this time, while closing the air flow inlet 1500, the pressure relief valve 4010 is opened for pressure relief. At the same time, through the extension of the electric telescopic rod 404, the inverted U-shaped installation plate 402 moves downward, and the electromagnetic chuck 403 is powered off, so that the metal gravity block 406 falls into the clamping placement plate 405 to accelerate the downward movement of the constant pressure regulation plate 42 until the upper trigger block 420 separates from the upper trigger button 410. When the nitrogen pressure is too low, the constant pressure regulation plate 42 will slide downward in the sliding groove 43 under the action of the air pressure, and the spring column 430 will be compressed. When the lower trigger block 421 contacts the lower trigger button 411, that is, the pressure in the lower constant pressure chamber 401 is too low. At this time, the flow rate of the nitrogen is increased;

[0062] S3. Then, after the nitrogen gas flows out of the constant-pressure regulating box 40, it enters the bottom end inside the buffer tank body 1 through the air inlet 10. When the nitrogen gas flows upward from the bottom, it is buffered by each buffer mesh plate 14 and flows out through the air outlet 11. As the nitrogen gas accumulates inside the buffer tank body 1 and the discharge rate is limited, when the pressure inside the buffer tank body 1 is too high, the nitrogen gas will enter the second regulating installation box 32. When the nitrogen gas pressure is high enough to push the baffle plate 34 to move towards the regulating port 30, at this time, the two spring pressing rods 340 are compressed, pushing the two regulating plates 33 away from each other, so that the regulating port 30 is opened, and the nitrogen gas enters each pressure regulating tank 2 through the regulating port 30 for pressure relief. As the two regulating plates 33 move away from each other, the connecting rod 330 will expand the elastic compression sleeve 320, and part of the nitrogen gas will flow back into the buffer tank body 1 through the pressure reduction hole 321 to avoid too fast a nitrogen gas outflow rate;

[0063] S4. Finally, when the pressure inside the buffer tank body 1 is too low, start the air pump 21, and use the air pump 21 to pump external air to the pressurizing air bag 35. As the pressurizing air bag 35 expands, the air pressure in each pressure regulating tank 2 increases, and the nitrogen gas passes through each communication port 12 and flushes open each blocking valve flap 130, entering the buffer tank body 1 to replenish the pressure until the nitrogen gas in the buffer tank body 1 is stably output through the air outlet 11.

Claims

1. A nitrogen multi-stage buffer tank with adjustable pressure, characterized in that, It includes a buffer tank body (1) with an air inlet (10) provided at the bottom end and an air outlet (11) provided at the upper end, a plurality of pressure regulating tanks (2) circumferentially distributed along the outer wall of the buffer tank body (1), an intelligent pressure regulating component (3), and a constant pressure buffer component (4) connected to the buffer tank body (1); A communication port (12) is provided on the side wall of the buffer tank body (1) corresponding to the position of each pressure regulating tank (2). An inflation port (20) is provided at the upper end of each pressure regulating tank (2). Each of the inflation ports (20) is connected to an air extraction pump (21) through a connecting pipe, and a pressure gauge (210) is provided at the connection; The intelligent pressure regulating component (3) includes a pressure reducing regulating member provided on the inner wall of the buffer tank body (1) corresponding to the position of each pressure regulating tank (2), and a pressure increasing regulating member provided in each pressure regulating tank (2). The pressure reducing regulating member includes an adjusting port (30) provided on the inner wall of the buffer tank body (1), a first adjusting installation box (31) provided on the inner wall of the buffer tank body (1) at the adjusting port (30), a second adjusting installation box (32) clamped at the center of the first adjusting installation box (31) and communicating with each other on the left and right sides, two adjusting plates (33) spliced with each other and provided in the second adjusting installation box (32) at the adjusting port (30), a pushing baffle (34) connected to the two adjusting plates (33) through a spring pressing rod (340). Elastic compression sleeves (320) are provided on the upper and lower sides of the second adjusting installation box (32) and inside the first adjusting installation box (31), and a plurality of pressure reducing holes (321) are uniformly provided on the outer wall of the elastic compression sleeve (320). The two adjusting plates (33) are respectively connected to the inside of the corresponding elastic compression sleeve (320) through connecting rods (330). The two adjusting plates (33) can respectively slide up and down along the inner wall of the second adjusting installation box (32). The pressure increasing regulating member includes a pressure increasing air bag (35) provided in the pressure regulating tank (2) and connected to the inflation port (20); The constant pressure buffer component (4) includes a constant pressure regulating box (40) connected to the air inlet (10), U-shaped frames (41) symmetrically distributed on the left and right sides inside the constant pressure regulating box (40), and a constant pressure regulating plate (42) provided in the constant pressure regulating box (40) and the side wall of which can slide up and down inside the U-shaped frame (41). The constant pressure regulating plate (42) divides the inside of the constant pressure regulating box (40) into an upper installation cavity (400) and a lower constant pressure cavity (401). Upper trigger blocks (420) and lower trigger blocks (421) are respectively provided at the upper and lower ends of the constant pressure regulating plate (42). Upper trigger buttons (410) and lower trigger buttons (411) are provided at the upper and lower ends of the U-shaped frame (41). A pressure relief valve (4010) is provided on the side wall of the lower constant pressure cavity (401).

2. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 1, characterized in that, The communication port (12) is provided with a one-way air intake assembly (13). The one-way air intake assembly (13) includes a plurality of blocking valve flaps (130) arranged along the inner wall of the communication port (12), and a sealing rubber strip (131) is arranged between adjacent two of the blocking valve flaps (130). One end of each blocking valve flap (130) is hinged to the inner wall of the communication port (12) and the other end converges towards the side close to the buffer tank body (1).

3. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 1, characterized in that, A plurality of limiting and fixing rings (22) are uniformly arranged in the pressure regulating tank (2) from top to bottom. The pressurizing airbag (35) passes through each of the limiting and fixing rings (22) in the vertical direction, and a soft rubber ring (220) is arranged on the inner wall of the limiting and fixing ring (22). The upper end of the pressurizing airbag (35) is connected to the inflation port (20) through a ventilation pipe, and the lower end of the pressurizing airbag (35) is connected to the inner wall of the pressure regulating tank (2) through a connecting column (350).

4. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 1, characterized in that, A sliding groove (43) is arranged in the U-shaped frame (41), and a spring column (430) connected to the bottom end of the constant pressure regulating plate (42) is arranged at the bottom end of the sliding groove (43). The constant pressure regulating plate (42) is slidably connected to the sliding groove (43). In the upper installation cavity (400) and directly above the constant pressure regulating plate (42), an inverted U-shaped installation disc (402), an electromagnetic chuck (403) arranged in the inverted U-shaped installation disc (402), an electric telescopic rod (404) arranged between the inverted U-shaped installation disc (402) and the upper installation cavity (400), a clamping and placing disc (405) arranged at the upper end of the constant pressure regulating plate (42), and a metal gravity block (406) that can be placed in the clamping and placing disc (405) are connected.

5. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 1, characterized in that, A plurality of buffer mesh plates (14) are uniformly arranged in the buffer tank body (1) from top to bottom, and each of the buffer mesh plates (14) is a detachable structure.

6. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 1, characterized in that, A gas filtering and purifying assembly (15) is connected to the air inlet (10). The gas filtering and purifying assembly (15) includes a filtering installation box (150) connected to the air inlet (10) through a connecting pipe and having an air flow inlet (1500) on the side wall, three through installation ports (151) arranged at the upper end of the filtering installation box (150), and a filtering plate (152) inserted into the through installation ports (151) and having a blocking cover plate (1520) for blocking the through installation ports (151) at the upper end. The three filtering plates (152) are respectively a filter mesh plate (1521), a moisture-absorbing filter mesh plate (1522), and a drying mesh (1523).

7. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 6, characterized in that, A pull handle (1524) is arranged at the upper end of the blocking cover plate (1520), and a sealing ring (1525) is arranged on the outer wall of the blocking cover plate (1520).

8. The nitrogen multi-stage buffer tank with adjustable pressure according to claim 1, characterized in that, It further includes a fixed support frame (5). The fixed support frame (5) includes a main fixed ring (50) clamped to the bottom end of the buffer tank body (1), a secondary fixed ring (51) connected to the main fixed ring (50) and corresponding to the pressure regulating tank (2) one by one, and a plurality of support legs (52) arranged at the bottom ends of the main fixed ring (50) and the secondary fixed ring (51). The main fixed ring (50) and the secondary fixed ring (51) are connected to each other.

9. The method for using a nitrogen multi-stage buffer tank with adjustable pressure according to any one of claims 1-8, characterized in that, Include the following steps: S1. First, nitrogen enters the filter installation box (150) through the air flow inlet (1500), and passes through the filter screen plate (1521), the moisture absorption filter screen plate (1522) and the drying screen (1523) in sequence, and the nitrogen is filtered, moisture absorbed and dried respectively. The treated nitrogen flows into the constant pressure regulating box (40) through the connecting pipe; S2. Secondly, after the nitrogen enters the constant pressure regulating box (40), it flows out through the lower constant pressure chamber (401). During the process of the nitrogen flowing through the lower constant pressure chamber (401), when the nitrogen pressure is too high, the constant pressure regulating plate (42) will slide upward in the sliding groove (43) under the action of the air pressure, and the spring column (430) will be stretched. When the upper trigger block (420) contacts the upper trigger button (410), that is, the pressure in the lower constant pressure chamber (401) is too high, at this time, while closing the air flow inlet (1500), the pressure relief valve (4010) is opened to release the pressure. At the same time, the electric telescopic rod (404) is extended to The inverted U-shaped mounting plate (402) is moved downward, and the electromagnetic suction cup (403) is powered off, so that the metal weight block (406) falls into the clamping placement plate (405), accelerating the constant pressure adjustment plate (42) to move downward until the upper trigger block (420) is separated from the upper trigger button (410). When the nitrogen pressure is too low, the constant pressure adjustment plate (42) will slide downward in the sliding groove (43) under the action of the air pressure, and the spring column (430) will be compressed. When the lower trigger block (421) contacts the lower trigger button (411), the pressure in the lower constant pressure chamber (401) is too low. At this time, the flow rate of the nitrogen is increased; S3. Then, after the nitrogen flows out of the constant pressure regulating box (40), it enters the bottom of the buffer tank (1) through the air inlet (10). When the nitrogen flows from bottom to top, it is buffered by each buffer mesh plate (14) and flows out through the air outlet (11). As the nitrogen accumulates inside the buffer tank (1) and the discharge rate is limited, when the pressure inside the buffer tank (1) is too high, the nitrogen will enter the second regulating installation box (32). When the nitrogen pressure is large enough and pushes the baffle plate (34) toward the pressure plate (34), the nitrogen will enter the second regulating installation box (32). Move close to the regulating port (30), at this time, the two spring extrusion rods (340) are compressed, pushing the two regulating plates (33) away from each other, so that the regulating port (30) is opened, and the nitrogen enters each pressure regulating tank (2) through the regulating port (30) for pressure relief. As the two regulating plates (33) move away from each other, the connecting rod (330) will open the elastic compression sleeve (320), so that part of the nitrogen will flow back into the buffer tank body (1) through the pressure reducing hole (321), thereby preventing the nitrogen from flowing out too fast; S4. Finally, when the internal pressure of the buffer tank body (1) is too low, start the air extraction pump (21), use the air extraction pump (21) to pump external air to the pressurizing airbag (35). As the pressurizing airbag (35) expands, the air pressure in each pressure regulating tank (2) increases, and nitrogen gas flushes open each sealing valve flap (130) through each communication port (12) and enters the buffer tank body (1) to replenish the pressure therein until the nitrogen gas in the buffer tank body (1) is stably output through the air outlet (11).

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