Method and device for regulating the inlet and outlet air pressure of a breather

Abstract

The application belongs to the technical field of air lock. The air lock inlet and outlet air pressure adjusting method comprises an air lock, characterized in that the adjusting method comprises: the air lock inlet and outlet are correspondingly provided with a first air path and a second air path; the air lock inlet pressure set value is P 进设 ; the environment pressure outside the air lock is P 环境 ; the air lock inlet pressure P 进 and the outlet pressure P 出 are detected; the air lock inlet pressure P 进 is adjusted by the first air path, so that P 进设 ≥P 进 ≥P 环境 ; the air lock outlet pressure P 出 is adjusted by the second air path, so that P 出 ≤P 进 . The application is used to solve the technical problems that the air lock inlet and outlet air pressure appears abnormal condition, resulting in reduced production capacity or no discharge. The application also discloses a device for realizing the air lock inlet and outlet air pressure adjusting method.

Description

Technical Field

[0001] This invention belongs to the field of airlock technology, and particularly relates to a method for regulating the inlet and outlet air pressure of an airlock, and an apparatus for implementing the above-mentioned regulation method. Background Technology

[0002] Airlocks, widely used in pneumatic conveying and ventilation / dust removal, primarily function to continuously and promptly discharge upstream materials while ensuring that the internal pressure of the equipment is not exposed to atmospheric pressure. However, in practical applications, various abnormalities can occur in the inlet and outlet air pressure of airlocks, leading to reduced airlock capacity or failure to discharge materials, thus affecting final use. Specifically:

[0003] (I) If the positive pressure at the inlet of the airlock exceeds the range, it will reduce the material filling rate and reduce the effective volume inside the airlock, resulting in a decrease in the output of the airlock.

[0004] (II) If there is a large negative pressure at the inlet relative to the outlet, the material will be adsorbed or even backflowed, resulting in the loss of the function of the airlock.

[0005] (III) If positive pressure occurs at the outlet of the airlock, some of the material that should have fallen will continue to rotate in the impeller groove, resulting in a decrease in the output of the airlock and affecting its performance.

[0006] Currently available airlocks typically have separate exhaust ports at the inlet and outlet to control air pressure. However, this method only allows for unidirectional adjustment to reduce the relative air pressure between the inlet and outlet; it cannot separately and bidirectionally adjust the relative air pressure between the inlet and outlet. This ultimately leads to a certain degree of functional loss or performance degradation of the airlock.

[0007] In summary, the airlocks currently on the market have independent and closed inlet and outlet. If the inlet and outlet air pressure is abnormal, it will eventually lead to the loss of some functions of the airlock or a certain degree of performance degradation, making it impossible to adjust the inlet and outlet in both directions independently through technical means. Summary of the Invention

[0008] The first objective of this invention is to provide a method for adjusting the inlet and outlet air pressure of a valve, which solves the technical problem that abnormal inlet and outlet air pressure of existing valves can lead to reduced valve capacity or failure to discharge materials.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a method for adjusting the inlet and outlet air pressure of a valve, comprising a valve, wherein the adjustment method includes:

[0010] The airlock is equipped with a first air passage and a second air passage at its inlet and outlet, respectively.

[0011] The inlet pressure setting value of the airlock is P 进设 The ambient pressure outside the airlock is P. 环境 ;

[0012] Detect the inlet pressure P of the airlock. 进 Export pressure P 出 ;

[0013] Adjust the inlet pressure P of the airlock using the first air passage. 进 , making P 进设 ≥P 进 ≥P 环境 ;

[0014] Adjust the outlet pressure P of the airlock using the second air passage. 出 , making P 出 ≤P 进 .

[0015] This invention sets up first and second air passages at the inlet and outlet of the airlock, and uses the first and second air passages to reasonably allocate, control and adjust the air pressure at the inlet and outlet of the airlock, so as to ensure the maximum performance utilization of the airlock and improve the material conveying efficiency.

[0016] To address the technical problem of how to adjust the inlet and outlet pressures of a valve, this invention employs the following technical solution: a method for adjusting the inlet and outlet air pressures of a valve.

[0017] When P 进 >P 进设 At that time, the pressure is released outward using the first air passage;

[0018] When P 进 <P 环境 At that time, the first air passage is used to pressurize the inlet of the airlock.

[0019] When P 出 >P 进 At that time, the pressure is released outward using the second air passage.

[0020] The first and second gas paths are independent gas paths, and the inlet and outlet pressures are adjusted separately using the first and second gas paths, without affecting each other, thus ensuring adjustment accuracy.

[0021] To address the technical problem of significant impact on the external environment when independently controlled first and second gas paths release pressure, the present invention adopts the following technical solution: the first gas path and the second gas path are connected.

[0022] When P 出 >P 环境 P 进设 >P 进 >P 环境 P 出 >P进 At this time, the second air passage releases pressure to the first air passage until the inlet and outlet pressures of the valve are balanced, P 出 =P 进 After the material enters the airlock, it falls off by gravity.

[0023] When P 出 >P 环境 P 进设 >P 进 >P 环境 P 出 <P 进 At this time, both the first and second air passages are closed, and the material entering the airlock is discharged under its own gravity.

[0024] When P 进 >P 环境 P 进 >P 进设 At this time, the second air passage closes, and the first air passage releases pressure outward until P... 进设 ≥P 进 ≥P 环境 ;

[0025] When P 出 <P 环境 P 进 <P 环境 When the second air passage is closed, the first air passage is used to pressurize the inlet of the valve until P... 进 =P 环境 After entering the airlock, the material is pulled down by its own gravity and the negative pressure at the outlet.

[0026] This invention connects the first air passage at the inlet of the airlock and the second air passage at the outlet of the airlock. By utilizing the pressure of the first and second air passages at the inlet and outlet for self-balancing and then external adjustment, the impact on the external environment can be reduced.

[0027] A second objective of this invention is to provide an apparatus for implementing the above-described method for regulating the inlet and outlet air pressure of a valve, comprising:

[0028] A shut-off valve, wherein the shut-off valve is provided with an inlet and an outlet;

[0029] The first air duct is installed at the inlet of the airlock, and the first air duct is equipped with a makeup air port and a first valve.

[0030] A second air duct is installed at the outlet of the airlock, and a second valve is installed on the second air duct.

[0031] The first pressure sensor is located at the inlet of the airlock;

[0032] The second pressure sensor is located at the inlet of the airlock.

[0033] This invention incorporates first and second air ducts and first and second pressure sensors at the inlet and outlet of the airlock. Through the combined action of these components, the air pressure at the inlet and outlet of the airlock is rationally allocated, controlled, and adjusted, ensuring maximum performance utilization of the airlock and improving material conveying efficiency.

[0034] To address the significant impact of pressure release from the first and second air ducts on the external environment, this invention employs the following technical solution: the first air duct is connected to the second air duct. This invention connects the first air path at the inlet of the airlock to the second air path at the outlet of the airlock, utilizing the pressure of the inlet and outlet first and second air paths for self-balancing before external adjustment, thereby reducing the impact on the external environment.

[0035] To address the technical problem of inconvenient manual control, this invention adopts the following technical solution: the device includes a controller, which is connected to the first pressure sensor and the second pressure sensor respectively. The controller promptly acquires the air pressure at the inlet and outlet of the airlock, and rationally allocates and controls the air pressure at the inlet and outlet of the airlock.

[0036] To solve the technical problem of low pressure release efficiency, the present invention adopts the following technical solution: a first dehumidifying fan is installed on the first air duct;

[0037] A second dehumidifier is installed on the second duct. By utilizing the first and second dehumidifiers installed on the first and second ducts respectively, the adjustment efficiency is improved.

[0038] To address the high cost of using two separate dehumidifiers to release pressure in the first and second ducts, this invention employs the following solution: the first and second ducts share a single dehumidifier, reducing the cost by half.

[0039] To address the technical issue of other systems affecting the dehumidifier when connected to other ducts for dehumidification during actual use, this invention employs the following technical solution: the first and second ducts are connected to the dehumidifier via a main duct. A third valve is installed on the main duct and connected to the controller. Adding the first valve to the main duct after the parallel connection of the inlet and outlet ensures the independence of this air pressure regulation system.

[0040] To address the technical problem of uneven airflow due to a duct installed on one side of the airlock outlet, this invention employs the following technical solution: the first duct includes a first duct branch one and a first duct branch two, which are respectively installed on both sides of the airlock inlet. By utilizing the first duct branch one and two on both sides, uniform airflow at the airlock inlet and outlet is achieved.

[0041] To address the technical problem of uneven airflow due to a duct installed on one side of the airlock outlet, this invention employs the following technical solution: the second duct includes a second duct branch one and a second duct branch two, which are respectively installed on both sides of the airlock outlet. By utilizing the second duct branches one and two on both sides, uniform air supply and exhaust at the airlock outlet are achieved.

[0042] To solve the technical problem of how to install the first and second pressure sensors, the present invention adopts the following technical solution: the first pressure sensor and the second pressure sensor are set on the same side of the airlock to adapt to different occasions.

[0043] To solve the technical problem of how to install the first and second pressure sensors, the present invention adopts the following technical solution: the first pressure sensor and the second pressure sensor are set on different sides of the airlock to meet different needs in different occasions.

[0044] To address the technical problem of how the controller is implemented, the present invention adopts the following technical solution, wherein the controller is a PLC or CPU, which is convenient to purchase and easy to use.

[0045] To address the technical problem of inconvenient manual control of the first and second valves, this invention adopts the following technical solution: the first and second valves are respectively connected to the controller. The controller allows for timely opening and closing of the first, second, and third valves, rationally allocating and controlling the inlet and outlet air pressure of the airlock, thereby improving regulation efficiency and accuracy.

[0046] To solve the technical problem of how the first, second, and third valves are implemented, the present invention adopts the following technical solution: the first valve is a one-way valve; the second valve is a one-way valve; and the third valve is an electric pneumatic valve, which is convenient to purchase and reliable to use. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the current mechanism of the blower;

[0048] Figure 2 This is a schematic diagram of the structure of the inlet and outlet air pressure regulating device of the airlock of the present invention. Figure 1 ;

[0049] Figure 3 This is a schematic diagram of the structure of the inlet and outlet air pressure regulating device of the airlock of the present invention. Figure 2 ;

[0050] Figure 4 This is a schematic diagram of the structure of the inlet and outlet air pressure regulating device of the airlock of the present invention. Figure 3 . Detailed Implementation

[0051] The invention will now be further described with reference to the accompanying drawings.

[0052] Example 1

[0053] A method for adjusting the inlet and outlet air pressure of a valve, comprising a valve, wherein the adjustment method includes:

[0054] The airlock is equipped with a first air passage and a second air passage at its inlet and outlet, respectively.

[0055] The inlet pressure setting value of the airlock is P 进设 The ambient pressure outside the airlock is P. 环境 ;

[0056] Detect the inlet pressure P of the airlock. 进 Export pressure P 出 ;

[0057] Adjust the inlet pressure P of the airlock using the first air passage. 进 , making P 进设 ≥P 进 ≥P 环境 ;

[0058] Adjust the outlet pressure P of the airlock using the second air passage. 出 , making P 出 ≤P 进 .

[0059] The optimal operating condition for the valve is when the inlet pressure is equal to or slightly greater than the outlet pressure, and the inlet pressure is maintained within a certain range, i.e., P. 进设 ≥P 进 ≥P 环境 .

[0060] In one embodiment, the first air path at the inlet of the valve and the second air path at the outlet of the valve are both independent air paths, meaning that the inlet and outlet of the valve are independently controlled, specifically:

[0061] When P 进 >P 进设 At that time, the pressure is released outward using the first air passage;

[0062] When P 进 <P 环境 At that time, the first air passage is used to pressurize the inlet of the airlock.

[0063] When P 出 >P 进 At that time, the pressure is released outward using the second air passage.

[0064] In one embodiment, the first air passage at the inlet of the airlock and the second air passage at the outlet of the airlock are connected. By utilizing the pressure of the first and second air passages for self-balancing before external adjustment, the impact on the external environment can be reduced. Specifically, the first air passage and the second air passage are connected.

[0065] When P 出 >P 环境 P 进设 >P 进 >P 环境 P 出 >P 进 At this time, the second air passage releases pressure to the first air passage until the inlet and outlet pressures of the valve are balanced, P 出 =P 进 After the material enters the airlock, it falls off by gravity.

[0066] When P 出 >P 环境 P 进设 >P 进 >P 环境 P 出 <P 进 At this time, both the first and second air passages are closed, and the material entering the airlock is discharged under its own gravity.

[0067] When P 进 >P 环境 P 进 >P 进设 At this time, the second air passage closes, and the first air passage releases pressure outward until P... 进设 ≥P 进 ≥P 环境 ;

[0068] When P 出 <P 环境 P 进 <P 环境 When the second air passage is closed, the first air passage is used to pressurize the inlet of the valve until P... 进 =P 环境 After entering the airlock, the material is pulled down by its own gravity and the negative pressure at the outlet.

[0069] Example 2

[0070] like Figure 2 As shown, the device for regulating the inlet and outlet air pressure of the airlock includes an airlock 100 and an air pressure regulating device.

[0071] The airlock 100 is equipped with an inlet 201 and an outlet.

[0072] The air pressure regulating device includes a first air duct 202, a second air duct 206, a first pressure sensor 203, a second pressure sensor 205, and a dehumidifying fan 204.

[0073] The first air duct 202 is installed at the inlet 201 of the airlock, and the first air duct 201 is provided with a makeup air port 208 and a first valve 209. Preferably, the first valve 209 is a one-way valve.

[0074] like Figure 3 , 4 As shown, in one embodiment, the first duct 202 includes a first duct branch 1 2021 and a first duct branch 2 2022, which are respectively disposed on both sides of the inlet of the airlock.

[0075] The second air duct 206 is located at the outlet of the airlock, and a second valve 207 is installed on the second air duct 206. Preferably, the second valve 207 is a one-way valve. Figure 3 , 4 As shown, in one embodiment, the second duct 206 includes a first second duct branch 2061 and a second second duct branch 2062, which are respectively disposed on both sides of the outlet of the airlock.

[0076] In one embodiment, the first air duct 201 is connected to the second air duct 202. The outlet of the airlock releases a portion of the pressure to the first air duct 201 through the second air duct 202 and the second valve 207, ultimately achieving pressure balance between the inlet and outlet. At this point, the material enters the airlock and is discharged by gravity. This invention connects the first air path at the inlet of the airlock to the second air path at the outlet, utilizing the pressure of the first and second air paths for self-balancing before external adjustment, thus reducing the impact on the external environment.

[0077] In one embodiment, a first dehumidifying fan is installed on the first duct, and a second dehumidifying fan is installed on the second duct. Utilizing the corresponding first and second dehumidifying fans on the first and second ducts improves regulation efficiency.

[0078] In one embodiment, the first and second air ducts share a single dehumidifying fan, reducing costs by half. Preferably, the first and second air ducts are connected to the dehumidifying fan via a main air duct.

[0079] A first pressure sensor 203 is installed at the inlet 201 of the airlock. A second pressure sensor 205 is installed at the inlet of the airlock. In one embodiment, as shown... Figure 2 As shown, the first pressure sensor 203 and the second pressure sensor 205 are located on the same side of the airlock 100. In one embodiment, as... Figure 3 , 4As shown, the first pressure sensor 203 and the second pressure sensor 205 are installed on different sides of the airlock 100.

[0080] In addition, the dehumidifier 204 will be connected to other pipes for dehumidification in actual use. To avoid the influence of other systems on this airlock, a third valve 210 is added to the main air duct after the parallel connection of the inlet and outlet to ensure the independence of this air pressure regulation system. The dehumidifier 204 is connected to the first air duct 202 and the second air duct 206 via the main air duct. The third valve 210 is preferably an electric air valve.

[0081] In one embodiment, the air pressure regulating device further includes a controller 211. The controller 211 is preferably a PLC or CPU. The controller 211 is connected to a first pressure sensor 203. The controller 211 is connected to a second pressure sensor 205. In one embodiment, the controller 211 is connected to a third valve 210. In another embodiment, the controller 211 is connected to a first valve 209 and a second valve 207, respectively.

[0082] Example 3

[0083] like Figure 2 As shown, material enters the airlock 100 structure through the airlock inlet 201. The first pressure sensor 203 detects the air pressure at the inlet 201. The second pressure sensor 205 detects the air pressure at the outlet.

[0084] Under normal circumstances, the pressure at the inlet of the valve 201 is within a certain range of positive pressure P. 进设 When the outlet pressure is negative, the material will be pulled down by the combined force of gravity and the negative outlet pressure.

[0085] Ⅰ- If the export pressure P 出 It exhibits positive pressure, and the outlet positive pressure value P 出 The positive pressure P at the inlet is greater than 进 (Within the range of inlet pressure), and with the air supply port 208 and the third valve 210 closed, the outlet releases some pressure through the second valve 207 to the inlet and then to the first duct 202, ultimately achieving pressure balance between the inlet and outlet. At this point, the material enters the airlock and falls due to gravity.

[0086] II - If the export pressure P 出 It exhibits positive pressure, and the outlet positive pressure value P 出 The positive pressure P at inlet 201 is less than 进 (The inlet pressure is within the range), and the air supply port 208 and the third valve 210 are closed, meaning the outlet pressure P 出 Relative to imported P 进Under negative pressure, the material enters the airlock and is pulled down by gravity and the relative negative pressure at the outlet.

[0087] Before the third valve 210 and the dehumidifier 204 are engaged, if any of the following conditions occur, the outlet air pressure will automatically adjust to be less than or equal to the inlet air pressure under the action of the second valve 207, and the material will be discharged.

[0088] Ⅲ- Such as the positive pressure value P at the inlet 进 P is too large and exceeds the specified range 进设 If the first pressure sensor 203 transmits the air pressure value to the controller 211, the controller 211 will issue a command to open the third valve 210, and the dehumidifier 204 will extract the excess positive pressure at the inlet 201. Afterwards, when the first pressure sensor 203 at the inlet 201 detects that the inlet air pressure has returned to the normal range, the controller 211 will issue a command to close the third valve 210.

[0089] IV - If negative pressure occurs at the inlet (which means the outlet will also be negative pressure after self-adjustment), the controller 211 sends a closing command to the third valve 210 and simultaneously opens the air supply port 208 to supply external air, gradually reducing the negative pressure value until it is balanced with the external air pressure, and the positive pressure is 0. Because the outlet is negative pressure at this time, and the presence of the second valve 207 isolates the external air supply from the outlet, maintaining the negative pressure at the outlet, the material, after entering, completes the falling process under the combined traction of its own gravity and the negative pressure at the outlet.

[0090] The above embodiments are only for illustrating the technical features and concepts of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and embodiments of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for regulating the inlet and outlet air pressure of a valve, including the valve itself, characterized in that... The adjustment method includes: The airlock is equipped with a first air passage and a second air passage at its inlet and outlet, respectively. The inlet pressure setting value of the airlock is P 进设 The ambient pressure outside the airlock is P. 环境 ; Detect the inlet pressure P of the airlock. 进 Export pressure P 出 ; Adjust the inlet pressure P of the airlock using the first air passage. 进 , making P 进设 ≥P 进 ≥P 环境 ; Adjust the outlet pressure P of the airlock using the second air passage. 出 , making P 出 ≤P 进 ; When P 进 >P 进设 At that time, the pressure is released outward using the first air passage; When P 进 <P 环境 At that time, the first air passage is used to pressurize the inlet of the airlock. When P 出 >P 进 At that time, the pressure is released outward using the second air passage.

2. The method for regulating the inlet and outlet air pressure of a valve according to claim 1, characterized in that: The first air passage and the second air passage are connected. When P 出 >P 环境 P 进设 >P 进 >P 环境 P 出 >P 进 At this time, the second air passage releases pressure to the first air passage until the inlet and outlet pressures of the valve are balanced, P 出 =P 进 After the material enters the airlock, it is dropped by gravity. When P 出 >P 环境 P 进设 >P 进 >P 环境 P 出 <P 进 At this time, both the first and second air passages are closed, and the material entering the airlock is discharged under its own gravity. When P 进 >P 环境 P 进 >P 进设 At this time, the second air passage closes, and the first air passage releases pressure outward until P... 进设 ≥P 进 ≥P 环境 ; When P 出 <P 环境 P 进 <P 环境 When the second air passage is closed, the first air passage is used to pressurize the inlet of the valve until P... 进 =P 环境 After entering the airlock, the material is pulled down by its own gravity and the negative pressure at the outlet.

3. An apparatus for implementing the inlet and outlet air pressure regulation method of the airlock as described in any one of claims 1-2, characterized in that, include: A shut-off valve, wherein the shut-off valve is provided with an inlet and an outlet; The first air duct is installed at the inlet of the airlock, and the first air duct is equipped with a makeup air port and a first valve. A second air duct is installed at the outlet of the airlock, and a second valve is installed on the second air duct. The first pressure sensor is located at the inlet of the airlock; The second pressure sensor is located at the inlet of the airlock.

4. The apparatus according to claim 3, characterized in that, The first air duct is connected to the second air duct.

5. The apparatus according to claim 3 or 4, characterized in that, The device includes a controller, which is connected to the first pressure sensor and the second pressure sensor respectively.

6. The apparatus according to claim 5, characterized in that, A first dehumidifier is installed on the first air duct; A second dehumidifier is installed on the second air duct.

7. The apparatus according to claim 5, characterized in that, The first air duct and the second air duct share a single dehumidifier.

8. The apparatus according to claim 7, characterized in that, The first air duct and the second air duct are connected to the dehumidifier via the main air duct. A third valve is installed on the main air duct and is connected to the controller.

9. The apparatus according to claim 3, characterized in that, The first duct includes a first duct branch one and a first duct branch two, which are respectively located on both sides of the inlet of the airlock.

10. The apparatus according to claim 3, characterized in that, The second air duct includes a second air duct branch one and a second air duct branch two, which are respectively located on both sides of the outlet of the airlock.

11. The apparatus according to claim 3, characterized in that, The first pressure sensor and the second pressure sensor are located on the same side of the airlock.

12. The apparatus according to claim 3, characterized in that, The first pressure sensor and the second pressure sensor are located on different sides of the airlock.

13. The apparatus according to claim 5, characterized in that, The controller is a PLC or a CPU.

14. The apparatus according to claim 5, characterized in that, The first valve and the second valve are respectively connected to the controller.

15. The apparatus according to claim 8, characterized in that, The first valve is a check valve; the second valve is a check valve; and the third valve is an electric pneumatic valve.

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