Nitrogen buffer tank
By introducing an annular diaphragm and a one-way valve structure into the nitrogen buffer tank to automatically regulate the gas pressure, and by using baffles to separate impurities and high-pressure airflow to clean them, the problems of unstable gas pressure and inconvenient cleaning of the nitrogen buffer tank are solved, achieving gas pressure balance and efficient cleaning.
Patent Information
- Application Number
- CN202520046848.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Existing nitrogen buffer tanks cannot automatically regulate internal pressure, resulting in large airflow fluctuations and inconvenient cleaning. In particular, when nitrogen impurities adhere to the inner wall, the tank needs to be manually disassembled for cleaning, and the existing cleaning devices are not ideal.
A nitrogen buffer tank was designed, which uses an annular sleeve and a one-way valve structure to automatically regulate the gas pressure. Combined with the upper and lower chambers separated by a partition and a filter screen, it uses high-pressure airflow to clean impurities, achieving automatic cleaning without disassembling the tank.
It achieves balanced and stable nitrogen gas pressure, reduces airflow fluctuations, and effectively removes impurities through high-pressure airflow, thus improving cleaning efficiency.
Smart Images
Figure CN223690839U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a nitrogen buffer tank belongs to nitrogen buffer tank technical field. BACKGROUND
[0002] The nitrogen machine produces the mixed gas of different purity nitrogen, and the purity of the nitrogen produced in the beginning and end stages of the nitrogen production process is higher than that in the middle stage, in order to prevent the fluctuation of the purity of nitrogen, most of the nitrogen machines are provided with a nitrogen buffer tank, which can output the nitrogen in a stable state.
[0003] The existing nitrogen buffer tank is not convenient to control the internal air pressure, which leads to too large or too small internal air pressure, and makes the output air flow fluctuate greatly.
[0004] In addition, after long-term use of the existing nitrogen buffer tank, impurities contained in the nitrogen will directly adhere to the inner wall of the buffer tank, which needs to be opened for manual cleaning, which is troublesome, and some cleaning devices exist in the prior art, which blow compressed air into the buffer tank through the air pump, but the inner cavity of the buffer tank is large, and after the compressed air is blown into the buffer tank, a high-speed high-pressure airflow cannot be formed, so the cleaning effect is not ideal.
[0005] From the above, it can be seen that the prior art has obvious inconvenience and defects in actual use, so it is necessary to improve. UTILITY MODEL CONTENTS
[0006] The utility model discloses to the deficiency in the background art, provide a kind of nitrogen buffer tank, can automatically adjust internal air pressure, and it can be completed cleaning without being disassembled buffer tank, during cleaning process, when using air pump to spray, impurity cleaning effect is good.
[0007] To solve the above technical problems, the utility model adopts the following technical scheme:
[0008] A nitrogen buffer tank, comprising a tank body, an annular spacer is sleeved on the outer side of the tank body, a pressure regulating cavity is formed between the annular spacer and the outer wall of the tank body, a fixed seat is fixed on the outer side of the annular spacer to fix the buffer tank; an exhaust pipe is arranged at the top of the tank body, and a gas inlet pipe is arranged at the bottom of the tank body;
[0009] A first one-way valve and a second one-way valve are arranged on the partition wall between the pressure regulating cavity and the inner cavity of the tank body;
[0010] The gas flow direction of the first one-way valve is from the inner cavity of the tank body to the pressure regulating cavity, and the gas flow direction of the second one-way valve is from the pressure regulating cavity to the inner cavity of the tank body.
[0011] Further, the annular spacer is also provided with a pressure relief valve.
[0012] Further, a partition is arranged at a lower position of the inner cavity of the tank, the partition divides the inner cavity of the tank into an upper cavity and a lower cavity, a sleeve is arranged at a lower end of the partition, a lower end of the sleeve is communicated with the lower cavity of the tank, and an upper end of the sleeve is communicated with the upper cavity of the tank and fixed on the partition.
[0013] Further, a filter screen is arranged in the sleeve, and air holes are arranged at positions below the filter screen in the sleeve.
[0014] Further, an upper cover plate is hinged at an opening of the sleeve on the partition, a return spring is arranged on a hinge shaft of the upper cover plate, and the upper cover plate is buckled at the opening of the sleeve.
[0015] Further, a back-blowing pipe is arranged at a position above the filter screen in the sleeve, an inner end of the back-blowing pipe is communicated with the inner cavity of the sleeve, and an outer end of the back-blowing pipe is communicated with outside of the tank.
[0016] A lower cover plate is hinged at the back-blowing pipe of the sleeve, a return spring is arranged on a hinge shaft of the lower cover plate, and a limiting protrusion is further arranged in the sleeve.
[0017] Further, a second plug is arranged at a bottom of the tank, the lower end of the sleeve extends to outside of the bottom of the tank, and a first plug is arranged at a lower outlet of the sleeve.
[0018] Further, the partition is funnel-shaped with a middle recess, a mounting hole is arranged in the middle of the partition, a plugging disc is arranged at the mounting hole, the plugging disc plugs the mounting hole, a rotating shaft is vertically arranged on an upper surface of the plugging disc, the rotating shaft extends out of the top of the tank, and a brush is fixed on the rotating shaft.
[0019] Compared with the prior art, the above technical scheme has the following advantages:
[0020] 1. When the pressure value of the inner cavity of the tank is higher than the set pressure of the first one-way valve, nitrogen overflows from the inner cavity of the tank to the pressure regulating cavity, and when the pressure value of the inner cavity of the tank is lower than the set pressure of the second one-way valve, nitrogen overflows from the pressure regulating cavity to the inner cavity of the tank, so that the pressure of the inner cavity of the tank is in a balanced state, and airflow fluctuation is reduced.
[0021] 2. When the lower cavity of the tank is cleaned, the outer end of the back-blowing pipe is connected to a high-pressure gas source, compressed gas pushes the lower cover plate upward, the limiting protrusion is blocked on the upper surface of the lower cover plate, the lower cover plate plugs the upper port of the sleeve, compressed air flows downward, impurities in the filter screen and the lower cavity are blown out, and the impurities are sprayed out of the lower end of the tank. Because the space of the lower cavity is relatively small, the impurities are relatively concentrated, and when the compressed gas flows through the lower cavity, a high-pressure and high-speed airflow is formed, so that the cleaning is relatively clean.
[0022] The utility model will be described in detail in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 is the internal structure schematic diagram of the utility model;
[0024] Figure 2 is Figure 1 the enlarged view of A in figure.
[0025] in the figure,
[0026] 1-tank body, 2-annular spacer, 3-fixed seat, 4-exhaust pipe, 5-inlet pipe, 6-first check valve, 7-second check valve, 8-pressure relief valve, 9-baffle, 10-rotating shaft, 11-plugging disc, 12-brush, 13-sleeve, 14-upper cover plate, 15-air hole, 16-lower cover plate, 17-limiting protrusion, 18-back flushing air pipe, 19-filter screen, 20-first plug, 21-second plug. DETAILED DESCRIPTION
[0027] In order to have more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be explained by referring to the drawings.
[0028] As Figures 1-2 shown, the utility model provides a nitrogen buffer tank, including the tank body 1 of cylinder, the outside of tank body 1 is equipped with annular spacer 2, forms pressure regulating cavity between annular spacer 2 and tank body 1 outer wall, the outside of annular spacer 2 is fixed with fixed seat 3, to fix buffer tank, the top of tank body 1 is equipped with exhaust pipe 4, the bottom of tank body 1 is equipped with inlet pipe 5,
[0029] the interval wall between pressure regulating cavity and tank body 1 inner chamber is equipped with first check valve 6 and second check valve 7,
[0030] the gas flow direction of first check valve 6 is from tank body 1 inner chamber to pressure regulating cavity, and the gas flow direction of second check valve 7 is from pressure regulating cavity to tank body 1 inner chamber.
[0031] when the pressure value of tank body 1 inner chamber is higher than that of pressure regulating cavity and exceeds the set pressure of first check valve 6, nitrogen overflows from tank body 1 inner chamber to pressure regulating cavity, when the pressure value of tank body 1 inner chamber is lower than that of pressure regulating cavity and exceeds the set pressure of second check valve 7, nitrogen overflows from pressure regulating cavity to tank body 1 inner chamber, so that the pressure of tank body 1 inner chamber is in equilibrium state, reduces airflow fluctuation,
[0032] further, the annular spacer 2 is also equipped with pressure relief valve 8, when the pressure value of tank body 1 inner chamber and pressure regulating cavity is relatively high, is discharged through pressure relief valve 8.
[0033] A partition 9 is arranged at a lower position of the inner cavity of the tank 1, which divides the inner cavity of the tank 1 into an upper cavity and a lower cavity, and a sleeve 13 is arranged at the lower end of the partition 9, the lower end of the sleeve 13 is communicated with the lower cavity of the tank 1, and the upper end of the sleeve 13 is communicated with the upper cavity of the tank 1 and fixed on the partition 9.
[0034] A filter screen 19 is arranged in the sleeve 13, and air holes 15 are arranged at a position below the filter screen 19 of the sleeve 13. Nitrogen gas enters the lower cavity of the tank 1 from the air inlet pipe 5, and then enters the sleeve 13 from the air holes 15 of the sleeve 13, and flows to the upper cavity on the upper side under the filtering action of the filter screen 19.
[0035] An upper cover plate 14 is hingedly connected to the opening of the sleeve 13 of the partition 9, and a return spring is arranged on the hinge shaft of the upper cover plate 14, so that the upper cover plate 14 is buckled at the upper opening of the sleeve 13, and when no nitrogen gas flows through, the upper cover plate 14 is buckled on the upper surface of the partition 9 to prevent impurities from falling.
[0036] A back-blowing pipe 18 is arranged at a position above the filter screen 19 of the sleeve 13, the inner end of the back-blowing pipe 18 is communicated with the inner cavity of the sleeve 13, and the outer end is communicated with outside of the tank 1, a lower cover plate 16 is hingedly connected to the back-blowing pipe 18 of the sleeve 13, a return spring is arranged on the hinge shaft of the lower cover plate 16, so that the lower cover plate 16 is buckled at the inner port of the back-blowing pipe 18, the outer port of the back-blowing pipe 18 is blocked by a screw cap, and a limiting protrusion 17 is further arranged in the sleeve 13.
[0037] A second plug 21 is arranged at the bottom of the tank 1, the lower end of the sleeve 13 extends to outside of the bottom of the tank 1, and a first plug 20 is arranged at the lower outlet of the sleeve 13. The filter screen 19 can be removed by opening the first plug 20.
[0038] Nitrogen gas enters the upper cavity of the tank 1 after being filtered by the filter screen 19 from the lower cavity of the tank 1, thus most of the impurities are concentrated in the lower cavity of the tank 1, when cleaning the lower cavity, the second plug 21 is opened, the outer end of the back-blowing pipe 18 is connected to a high-pressure gas source, the compressed gas pushes the lower cover plate 16 upward, the limiting protrusion 17 is blocked on the upper surface of the lower cover plate 16, so that the lower cover plate 16 blocks the upper port of the sleeve 13, the compressed air flows downward, blows out the impurities in the filter screen 19 and the lower cavity, and the impurities are sprayed out from the lower end of the tank 1. Because the space of the lower cavity is relatively small and the impurities are relatively concentrated, when the compressed gas flows through the lower cavity, a high-pressure and high-speed airflow is formed, and the cleaning is relatively clean.
[0039] Further, the partition plate 9 is funnel-shaped with a middle recess, and a mounting hole is arranged in the middle of the partition plate 9, and a blocking disc 11 is arranged at the mounting hole, the blocking disc 11 blocks the mounting hole, and a rotating shaft 10 is vertically arranged on the upper surface of the blocking disc 11, the rotating shaft 10 penetrates out of the top of the tank body 1 and is locked by a nut, and a brush 12 is fixed on the rotating shaft 10, when cleaning the upper cavity, the nut fixing the rotating shaft 10 is loosened, the blocking disc 11 is separated from the mounting hole, the rotating shaft 10 is rotated, the brush 12 cleans the inner wall of the upper cavity, and the impurities flow to the lower cavity from the mounting hole in the middle of the partition plate 9.
[0040] The above is the example of the best embodiment of the present application, wherein the parts not described in detail are the common knowledge of the ordinary skilled in the art. The protection scope of the present application is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present application is also within the protection scope of the present application.
Claims
1. A nitrogen buffer tank characterized by: The application relates to a pressure regulating tank, which comprises a tank body (1), an annular spacer sleeve (2) sleeved outside the tank body (1), a pressure regulating cavity formed between the annular spacer sleeve (2) and the outer wall of the tank body (1), a fixing seat (3) fixed outside the annular spacer sleeve (2) for fixing a buffer tank, an exhaust pipe (4) arranged at the top of the tank body (1), and an air inlet pipe (5) arranged at the bottom of the tank body (1). A first one-way valve (6) and a second one-way valve (7) are arranged on the partition wall between the pressure regulating cavity and the inner cavity of the tank body (1). The air flow direction of the first one-way valve (6) is from the inner cavity of the tank body (1) to the pressure regulating cavity, and the air flow direction of the second one-way valve (7) is from the pressure regulating cavity to the inner cavity of the tank body (1).
2. A nitrogen buffer tank as claimed in claim 1, wherein: The annular spacer sleeve (2) is further provided with a pressure relief valve (8).
3. A nitrogen buffer tank as claimed in claim 1, wherein: A partition plate (9) is arranged at a lower position of the inner cavity of the tank body (1), the partition plate (9) divides the inner cavity of the tank body (1) into an upper cavity and a lower cavity, a sleeve pipe (13) is arranged at the lower end of the partition plate (9), the lower end of the sleeve pipe (13) is communicated with the lower cavity of the tank body (1), and the upper end of the sleeve pipe (13) is communicated with the upper cavity of the tank body (1) and fixed on the partition plate (9).
4. A nitrogen buffer tank as claimed in claim 3, wherein: A filter screen (19) is arranged in the sleeve pipe (13), and air holes (15) are arranged at a position below the filter screen (19) of the sleeve pipe (13).
5. A nitrogen buffer tank as claimed in claim 4, wherein: An upper cover plate (14) is hinged to the opening of the sleeve pipe (13) of the partition plate (9), and a return spring is arranged on the hinge shaft of the upper cover plate (14) to enable the upper cover plate (14) to be buckled on the upper opening of the sleeve pipe (13).
6. A nitrogen buffer tank as claimed in claim 5, characterised in that: A back-blowing air pipe (18) is arranged at a position above the filter screen (19) of the sleeve pipe (13), the inner end of the back-blowing air pipe (18) is communicated with the inner cavity of the sleeve pipe (13), and the outer end of the back-blowing air pipe (18) is communicated with the outside of the tank body (1). A lower cover plate (16) is hinged to the sleeve pipe (13) at the position of the back-blowing air pipe (18), a return spring is arranged on the hinge shaft of the lower cover plate (16), and a limiting protrusion (17) is further arranged in the sleeve pipe (13).
7. A nitrogen buffer tank as claimed in claim 3, wherein: A second plug (21) is arranged at the bottom of the tank body (1), the lower end of the sleeve pipe (13) extends to the outside of the bottom of the tank body (1), and a first plug (20) is arranged at the lower outlet of the sleeve pipe (13).
8. A nitrogen buffer tank as claimed in claim 3, wherein: The partition plate (9) is funnel-shaped with a recessed middle portion, an installation hole is arranged in the middle portion of the partition plate (9), a plugging disc (11) is arranged at the installation hole, the plugging disc (11) plugs the installation hole, a rotating shaft (10) is vertically arranged on the upper surface of the plugging disc (11), the rotating shaft (10) extends to the outside of the top of the tank body (1), and a brush (12) is fixed on the rotating shaft (10).