Nitrogen charging regulation and control system of storage stacking machine

Abstract

The invention relates to the field of storage, in particular to a storage stacking machine nitrogen charging regulation and control system which comprises nitrogen making equipment, a conveying device and a judging device. The nitrogen generation equipment is used for preparing high-concentration nitrogen; the conveying device is used for conveying the prepared high-concentration nitrogen into a plurality of stacks, and an electric control valve is arranged on a conveying pipeline corresponding to each stack; and the judging device is used for judging whether the oxygen concentration and / or pressure in the stack reaches a set value or not, and controlling the electric valve to switch the stack filled with nitrogen after the oxygen concentration and / or pressure reaches the set value. High-concentration nitrogen is prepared through nitrogen making equipment and filled into the stack, and when the oxygen concentration or pressure in the stack reaches a set value, the electric valve is controlled to switch to other tobacco stacks for nitrogen filling. The nitrogen prepared by the nitrogen preparation equipment in the process can be effectively filled into the stack all the time without being wasted, and meanwhile, the efficiency of replacing and reducing the oxygen concentration is improved. And operators do not need to work on site, so that higher safety is realized.

Description

Technical Field

[0001] The present application relates to the field of warehousing, and in particular to a mechanical nitrogen filling and regulating system for warehousing stacking. Background Art

[0002] When tobacco leaves are stored, the oxygen concentration, temperature and humidity in the pile need to be controlled to ensure that the tobacco leaves are aged in the preset environment. When reducing the oxygen concentration in the pile, high-concentration nitrogen is usually prepared to replace the oxygen in the pile to achieve the purpose of reducing the oxygen concentration. When Chinese medicinal materials or grains are stored in piles, the environment in the pile also needs to be controlled.

[0003] At present, in order to increase the speed of replacing the low oxygen concentration environment in the stack, warehouses usually use high-power nitrogen generators to prepare nitrogen. However, the nitrogen pipeline joints between the existing nitrogen generator and multiple stacks are connected by manual replacement. During the nitrogen filling process, the staff is required to observe the stack in real time. When the stack is filled with nitrogen and pressurized, it is necessary to promptly replace the pipeline joint with the pipeline joint of other stacks that are not filled with nitrogen. In this way, although the nitrogen making equipment quickly prepares a large amount of high-concentration nitrogen, it takes time for the staff to replace the pipeline joint, so a large amount of nitrogen prepared during the replacement of the pipeline joint is wasted. In addition, the requirements for on-site staff are relatively high. Once a work error occurs and the nitrogen is over-filled, resulting in the stack membrane cover bursting due to overpressure, not only is the workload of re-covering the membrane cover large, but the staff is also prone to danger in a low-oxygen environment. Summary of the invention

[0004] In order to improve the efficiency of nitrogen filling and oxygen reduction for multiple stacks, the present application provides a mechanical nitrogen filling and control system for storage stacks.

[0005] The present application provides a storage stacking mechanical nitrogen filling control system, which adopts the following technical solution:

[0006] A storage stacking mechanical nitrogen filling control system, including nitrogen making equipment, a transmission device, and a judgment device;

[0007] Nitrogen production equipment, used to prepare high-concentration nitrogen;

[0008] A transmission device is used to transport the prepared high-concentration nitrogen into multiple stacks, and an electric-controlled valve is provided on the delivery pipeline corresponding to each stack;

[0009] The judging device is used to judge whether the oxygen concentration and / or pressure in the stack has reached a set value, and to control the electric valve to switch the stack to be filled with nitrogen after reaching the set value.

[0010] By adopting the above technical solution, high-concentration nitrogen is prepared by the nitrogen-making equipment and filled into the pile to reduce the oxygen concentration in the pile. When the oxygen concentration or pressure in the pile reaches the set value, the electric valve is controlled to switch other piles for nitrogen filling. Since the nitrogen prepared by the nitrogen-making equipment can be effectively filled into the pile without being wasted in this process, the efficiency of replacing and reducing the oxygen concentration is improved. And since there is no need for operators to operate on site, the operation is safer.

[0011] Preferably, it also includes a pressure release component located on the stack and connected to the pipe network, wherein the pressure release component is used to open to release the gas in the stack when the gas pressure in the stack reaches a set value.

[0012] By adopting the above technical solution, a pressure release component is provided so that when the gas pressure in the stack is too high, the gas can be released through the pipe network through the pressure release component to avoid the stack film cover from bursting.

[0013] Preferably, the pressure release assembly comprises a shell, a force-bearing portion is protrudingly formed in the middle of the outer surface of the shell, and a clamping connector is threadedly connected to one end of the shell.

[0014] By adopting the above technical solution, part of the shell is passed through the opening on the membrane cover, and then the clamping connector is connected so that the force-bearing part and the clamping connector cooperate to clamp the membrane cover and fix the pressure release assembly on the membrane cover.

[0015] Preferably, an annular limiting boss is formed on the inner wall of the shell near one end of the clamping connector, a compressible elastic part abutting against the limiting boss is provided in the shell, the other end of the compressible elastic part is connected to a rubber sealing sheet, and an adjusting part is connected to the end of the shell away from the clamping connector, and the adjusting part abuts against the rubber sealing sheet to form a sealing surface.

[0016] By adopting the above technical solution, when nitrogen is first filled, since the pressure inside the pile is relatively small, the rubber sealing sheet and the adjusting member abut against each other to form a sealing surface under the action of the compressible elastic member. When nitrogen is continuously filled until the pressure difference between the inside and outside of the pile is greater than the force of the compressible elastic member, the rubber sealing sheet opens and the gas inside the pile is released. When nitrogen filling is completed, nitrogen is no longer filled into the pile, and at this time, the rubber sealing sheet and the adjusting member re-form a sealing surface to avoid gas exchange between the inside and outside of the pile, which causes an increase in oxygen concentration inside the pile.

[0017] Preferably, the shell is formed with an adjusting external thread that cooperates with the adjusting piece thread, and the adjusting external thread is formed with an identification portion along the length direction of the shell. The identification portion is formed by a partial indentation of the shell on the adjusting external thread, and an opening pressure identification is provided on the identification portion.

[0018] By adopting the above technical solution, the opening pressure of the current pressure relief component can be determined by the indication of the marking part, so that the pressure relief component can be adjusted according to the demand to reach the set opening pressure value.

[0019] Preferably, the adjusting member includes an internal thread section cooperating with the adjusting external thread, an extension section extending toward the center direction of the adjusting member at one end of the internal thread section away from the force-bearing portion, and an adjusting limit section extending from one end of the extension section away from the internal thread section toward the inside of the shell. A limit ring is formed on the inner side wall of the adjusting limit section away from one end of the extension section. The side of the limit ring facing the rubber sealing sheet is a plane that fits the rubber sealing sheet, and the outer diameter of the plane is equal to the outer diameter of the rubber sealing sheet.

[0020] Preferably, the side of the limiting ring facing away from the rubber sealing sheet is a conical surface, and the conical surface is inclined from the outer contour of the limiting ring to the inner contour direction toward the rubber sealing sheet side.

[0021] By adopting the above technical solution, the airflow can be better guided to the rubber sealing sheet through the conical surface, so that the rubber sealing sheet can be smoothly impacted and opened when the pressure is sufficient.

[0022] Preferably, an end portion of the adjustment limit section away from one end of the extension section is formed with an inclined guide surface, and the inclined guide surface is inclined from a side close to the shell toward the direction of the rubber sealing sheet toward a side of the limit plate.

[0023] By adopting the above technical solution, the inclined guide surface is provided to guide the rubber sealing piece to reset so that it can smoothly reach a state of abutment and cooperation with the entire surface of the limit ring, thereby avoiding deviation of the reset position of the rubber sealing piece and resulting in failure to form a sealing surface.

[0024] Preferably, the width of the inclined guide surface is greater than the thickness of the rubber sealing sheet; the inclined guide surface is evenly formed with airflow channels around it, and the airflow channels extend from one end of the inclined guide surface close to the limiting ring to one end of the inclined guide surface close to the shell.

[0025] By adopting the above technical solution, the rubber sealing sheet only needs to be slightly opened under the pressure difference through the air flow channel to form a larger gas flow channel, so that the gas in the stack can be released smoothly and quickly, avoiding the situation where the pressure in the stack continues to rise due to insufficient flow, resulting in the membrane cover bursting.

[0026] Preferably, the compressible elastic member is a conical spring, the end of the conical spring abutting against the limiting boss is the large end, and the end of the conical spring connected to the rubber sealing sheet is the small end.

[0027] By adopting the above technical solution, the compressible elastic member can be compressed into a smaller width space in the housing through the structure of the conical spring, so as to reduce the size of the entire pressure release assembly, reduce the overall weight, and enable it to be smoothly installed at various positions of the membrane cover. At the same time, since the width of the inclined guide surface is greater than the width of the rubber sealing sheet and the design of the air flow channel, the conical spring can still have a sufficiently large gas flow channel.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. High-concentration nitrogen is prepared by nitrogen-making equipment and filled into the stack to reduce the oxygen concentration in the stack. When the oxygen concentration or pressure in the stack reaches the set value, the electric valve is controlled to switch other stacks for nitrogen filling. Since the nitrogen prepared by the nitrogen-making equipment can be effectively filled into the stack without being wasted during this process, the efficiency of replacement and reduction of oxygen concentration is improved. And since no operator is required to operate on site, the operation is safer.

[0030] 2. By setting up a pressure release component, when the air pressure in the stack is too high, the gas can be released through the pressure release component to avoid the stack film cover from bursting. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the mechanical nitrogen filling control system for storage stacking;

[0032] Figure 2 is a schematic cross-sectional view of a pressure relief assembly.

[0033] Explanation of the reference numerals in the accompanying drawings: 1. nitrogen generator; 2. electric control valve; 3. pressure release assembly; 4. housing; 5. mounting external thread; 6. adjusting external thread; 7. force-bearing part; 8. clamping connector; 9. limiting boss; 10. conical spring; 11. rubber sealing sheet; 12. adjusting part; 13. internal thread section; 14. extension section; 15. adjusting limiting section; 16. limiting ring; 17. inclined guide surface; 18. air flow channel. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-2 This application is described in further detail.

[0035] The embodiment of the present application discloses a mechanical nitrogen filling control system for storage stacking.

[0036] Embodiment 1:

[0037] The mechanical nitrogen filling and control system for storage stacking includes nitrogen making equipment, a transmission device for conveying the nitrogen prepared by the nitrogen making equipment into the stack, and a judgment device for judging whether the oxygen concentration in the stack reaches a set value.

[0038] like Figure 1 As shown, the nitrogen making equipment is a high-power nitrogen making machine 1, and high-concentration nitrogen is prepared by the nitrogen making machine 1. The conveying device includes a main pipeline connected to the output port of the nitrogen making machine 1, and branch pipelines respectively connected to the main pipeline and each stack. Each main pipeline is provided with an electric control valve 2 (its opening and closing is controlled by a remote electrical signal), and a pressure release component 3 is installed on the other side of each stack to prevent the air pressure in the stack from being too high. An oxygen concentration sensor is provided in each stack as a judgment device.

[0039] like Figure 2 As shown, the pressure release assembly 3 includes a cylindrical shell 4, both ends of the outer surface of the shell 4 are formed with external threads, the two sections of external threads are respectively the installation external thread 5 and the adjustment external thread 6, and the part between the two sections of external threads is formed with an external hexagonal force-bearing part 7. The shell 4 is threadedly connected to the position of the external thread, and the thread inside the compression connector 8 cooperates with the installation external thread 5. The pressure release assembly 3 is fixed to the membrane cover by putting the opening position of the membrane cover on the outside of the installation external thread 5 and then compressing the compression connector 8. The other end of the compression connector 8 is connected to the pipeline network, and the displaced gas is discharged from the warehouse through the pipeline network.

[0040] like Figure 2 As shown, an annular limiting boss 9 is formed on the inner side wall of the housing 4 at one end where the external thread 5 is installed, and a conical spring 10 is arranged in the housing 4, the large end of the conical spring 10 abuts against the limiting boss 9, and the outer diameter of the large end of the conical spring 10 is equal to the inner diameter of the housing 4. A rubber sealing sheet 11 is fixed to the small end of the conical spring 10, and the diameter of the rubber sealing sheet 11 is smaller than the inner diameter of the housing 4.

[0041] like Figure 2As shown, the housing 4 is threadedly connected with an adjusting member 12 at the position of the adjusting external thread 6, and an identification portion is formed on the adjusting external thread 6 along the length direction of the housing 4. The identification portion is formed by the housing 4 being partially recessed at the adjusting external thread 6, and an opening pressure identification is provided on the identification portion to indicate the opening air pressure of the pressure release assembly 3 when the adjusting member 12 is screwed to different positions. The adjusting member 12 includes an internal thread section 13 that cooperates with the adjusting external thread 6, an extension section 14 that extends toward the center direction of the adjusting member 12 at one end of the internal thread section 13 away from the force-bearing portion 7, and an adjusting limit section 15 that extends toward the inside of the housing 4 from one end of the extension section 14 away from the internal thread section 13. A limit ring 16 is formed on the inner side wall of the adjusting limit section 15 away from the end of the extension section 14, and the side of the limit ring 16 facing the rubber sealing sheet 11 is a plane that fits the rubber sealing sheet 11, and the outer diameter of the plane is equal to the outer diameter of the rubber sealing sheet 11. The side of the limit ring 16 facing away from the rubber sealing sheet 11 is a conical surface, and the conical surface is inclined from the outer contour of the limit ring 16 to the inner contour direction toward the rubber sealing sheet 11. The end of the adjustment limit section 15 away from the extension section 14 is formed with an inclined guide surface 17, and the inclined guide surface 17 is inclined from the side close to the housing 4 to the rubber sealing sheet 11 toward the side of the limit plate, so that the rubber sealing sheet 11 is just abutted and matched with the limit ring 16 under the guidance of the inclined guide surface 17. And from the cross-sectional perspective in the figure, the width of the inclined guide surface 17 is greater than the thickness of the rubber sealing sheet 11. The inclined guide surface 17 is evenly formed with airflow channels 18 around it, and the airflow channels 18 extend from the end of the inclined guide surface 17 close to the limit ring 16 to the end of the inclined guide surface 17 close to the housing 4.

[0042] Specific use process:

[0043] When starting to produce nitrogen and reduce oxygen, the high-power nitrogen generator 1 is started, and the electric control valve 2 on the branch pipe connecting one or more of the piles is opened. The high-power nitrogen generator 1 prepares high-concentration nitrogen and fills it into the corresponding pile. When the air pressure in the pile is greater than the set pressure of the pressure release component 3, the pressure release component 3 opens, and the gas in the pile is replaced and discharged by the high-concentration nitrogen. Until the oxygen concentration sensor detects that the oxygen concentration is less than the set concentration, the electric control valve 2 corresponding to the pile is closed, and the electric control valve 2 of the branch pipe corresponding to the pile that is not filled with nitrogen is opened. Since the nitrogen prepared by the high-power nitrogen generator 1 can be effectively filled into the pile without being wasted during the nitrogen filling and replacement process, energy consumption can be reduced, and the efficiency of replacement and reduction of oxygen concentration can be improved. And since there is no need for operators to work on site, the operation is safer.

[0044] Embodiment 2:

[0045] The difference between this embodiment and the first embodiment is that the mechanical nitrogen filling control system for storage stacking includes a nitrogen generating device, a transmission device for transmitting the nitrogen generated by the nitrogen generating device into the stack, a judgment device for judging whether the pressure and / or oxygen concentration in the stack reaches a set value, and an extraction device for extracting gas in the stack. The extraction device includes an exhaust pipe connected to the stack and an exhaust pump connected to the exhaust pipe, and the exhaust pump cooperates to extract the gas in the stack.

[0046] The judgment device can only judge the situation of pressure:

[0047] When nitrogen production and oxygen reduction begin, the high-power nitrogen generator 1 starts, and the electric control valve 2 on the branch pipe connecting one or more stacks is opened. The high-power nitrogen generator 1 prepares high-concentration nitrogen and fills it into the corresponding stack. When the pressure in the stack reaches the upper pressure limit setting value of the judgment device, the electric control valve 2 switches to other stacks to continue filling nitrogen. After standing for a period of time, the extraction device begins to extract the gas in the stack that has stopped inputting nitrogen, until the pressure in the stack reaches the lower pressure limit setting value of the judgment device, and the exhaust device stops extracting the gas in the stack. Reciprocating cycle until each stack stops after a certain number of nitrogen filling and exhaust cycles.

[0048] The judging device can judge the pressure and oxygen concentration:

[0049] When starting to produce nitrogen and reduce oxygen, the high-power nitrogen generator 1 is started, and the electric control valve 2 on the branch pipe connecting one or more of the stacks is opened. The high-power nitrogen generator 1 prepares high-concentration nitrogen and fills it into the corresponding stack. When the pressure in the stack reaches the upper pressure limit setting value of the judgment device, the electric control valve 2 switches to other stacks to continue filling nitrogen. After standing for a period of time, the extraction device begins to extract the gas in the stack that has stopped inputting nitrogen, until the pressure in the stack reaches the lower pressure limit setting value of the judgment device, the exhaust device stops extracting the gas in the stack. Reciprocating cycle until the oxygen concentration in the stack is lower than the set value.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A storage stacking mechanical nitrogen filling control system, characterized by: Including nitrogen production equipment, transmission equipment, and judgment equipment; Nitrogen production equipment, used to prepare high-concentration nitrogen; A transmission device is used to transport the prepared high-concentration nitrogen into a plurality of stacks, and an electric control valve (2) is arranged on the transport pipeline corresponding to each stack; The judging device is used to judge whether the oxygen concentration and / or pressure in the stack has reached a set value, and to control the electric valve to switch the stack to be filled with nitrogen after reaching the set value.

2. The storage stacking mechanical nitrogen filling control system according to claim 1 is characterized by: It also comprises a pressure release assembly (3) located on the stack and connected to the pipe network, wherein the pressure release assembly (3) is used to open when the gas pressure in the stack reaches a set value to release the gas in the stack.

3. The storage stacking mechanical nitrogen filling control system according to claim 2 is characterized by: The pressure release assembly (3) comprises a shell (4), a force-bearing portion (7) is protrudingly formed in the middle of the outer surface of the shell (4), and a compression connector (8) is threadedly connected to one end of the shell (4).

4. The storage stacking mechanical nitrogen filling control system according to claim 3 is characterized by: An annular limiting boss (9) is formed on the inner side wall of the shell (4) near one end of the clamping connector (8), and a compressible elastic member abutting against the limiting boss (9) is provided in the shell (4). The other end of the compressible elastic member is connected to a rubber sealing sheet (11), and an adjusting member (12) is connected to one end of the shell (4) away from the clamping connector (8), and the adjusting member (12) abuts against the rubber sealing sheet (11) to form a sealing surface.

5. The storage stacking mechanical nitrogen filling control system according to claim 4 is characterized by: The housing (4) is formed with an adjusting external thread (6) that matches the thread of the adjusting member (12); the adjusting external thread (6) is formed with an identification portion along the length direction of the housing (4); the identification portion is formed by a recessed portion of the housing (4) at the adjusting external thread (6); and an opening pressure identification is provided on the identification portion.

6. The storage stacking mechanical nitrogen filling control system according to claim 5 is characterized by: The adjusting member (12) comprises an internal thread section (13) matched with the adjusting external thread (6), an extension section (14) located at an end of the internal thread section (13) away from the force-bearing portion (7) and extending toward the center direction of the adjusting member (12), and an adjusting limit section (15) extending from an end of the extension section (14) away from the internal thread section (13) toward the inside of the housing (4), a limit ring (16) is formed on the inner side wall of the end of the adjusting limit section (15) away from the extension section (14), and the side of the limit ring (16) facing the rubber sealing sheet (11) is a plane that fits the rubber sealing sheet (11), and the outer diameter of the plane is equal to the outer diameter of the rubber sealing sheet (11).

7. The storage stacking mechanical nitrogen filling control system according to claim 6 is characterized by: The side of the limiting ring (16) facing away from the rubber sealing sheet (11) is a conical surface, and the conical surface is inclined from the outer contour of the limiting ring (16) to the inner contour direction toward the side of the rubber sealing sheet (11).

8. The storage stacking mechanical nitrogen filling control system according to claim 6 is characterized by: An end portion of the adjustment limit section (15) away from one end of the extension section (14) is formed with an inclined guide surface (17), and the inclined guide surface (17) is inclined from a side close to the housing (4) toward the direction of the rubber sealing sheet (11) toward a side of the limit plate.

9. The storage stacking mechanical nitrogen filling control system according to claim 8 is characterized by: The width of the inclined guide surface (17) is greater than the thickness of the rubber sealing sheet (11); and airflow channels (18) are evenly distributed around the inclined guide surface (17), and the airflow channels (18) extend from one end of the inclined guide surface (17) close to the limiting ring (16) to one end of the inclined guide surface (17) close to the housing (4).

10. The storage stacking mechanical nitrogen filling control system according to claim 9 is characterized by: The compressible elastic member is a conical spring (10), the end of the conical spring (10) abutting against the limiting boss (9) is the large end, and the end of the conical spring (10) connected to the rubber sealing sheet (11) is the small end.

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