Variable flow pulsating flow pressure balancing system

Abstract

This invention discloses a variable flow pulsating flow pressure balancing system, belonging to the field of gas flow technology. It includes a pressure-stabilized gas source, characterized by: a gas flow meter and a synchronization valve installed on a first gas flow pipe, a first pressure tap on the first gas flow pipe, and a second pressure tap on a second gas flow pipe. One end of the main pipeline is connected to the pressure-stabilized gas source, and the other end of the main pipeline is connected to the inlet of a variable flow pulsating flow pressure balancer. The outlet of the variable flow pulsating flow pressure balancer is connected to both the first and second pressure taps. A first pressure transmitter is installed on the first pressure tap, and a second pressure transmitter is installed on the second pressure tap. A throttling valve is installed on the second gas flow pipe, located at the second pressure tap. When used in variable flow or pulsating flow scenarios, this invention can effectively reduce pressure fluctuations, ensure that the gas flow state in the pipeline remains stable within a very short time, and improve measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of gas flow technology, and more particularly to a variable flow pulsating flow pressure balance system. Background Technology

[0002] Gas flows in closed pipelines, and its pressure, velocity, and flow rate are crucial parameters. In actual processes, the gas flow state cannot remain stable at a single value. The same process pipeline may require different gas flow rates at different times and for different processes—this is known as variable flow. Some processes require gas flow for certain periods and interrupt it for others—this is known as pulsating flow. Regardless of whether it's variable flow or pulsating flow, the gas flow state should remain stable at a certain value, and changing the process should stabilize it at another value. Modern precision manufacturing processes using gases have high requirements for gas flow rate and pressure, which also places high demands on the flow meters used to measure these gases. Stable control of pressure and flow is particularly important; otherwise, the accuracy of the measurement results will be affected.

[0003] Chinese patent document CN103335438A, published on October 2, 2013, discloses a variable flow rate two-stage compression refrigeration system with incomplete intermediate cooling and one-stage throttling. The system is characterized by comprising multiple sets of variable flow rate two-stage compression condenser units connected in parallel between a low-pressure suction line and a high-pressure liquid supply line. Each set of variable flow rate two-stage compression condenser units consists of a low-pressure constant flow compressor, a low-pressure variable flow compressor, a high-pressure variable flow compressor, a first one-way valve, a second one-way valve, a condenser, a throttling valve, and an intercooler. The suction ports of the low-pressure constant flow compressor and the low-pressure variable flow compressor in each set are connected in parallel to the low-pressure suction line. The pipe-side outlet of the intercooler in each set is connected to the high-pressure liquid supply line. The discharge port of the low-pressure constant flow compressor is connected to the inlet of the first one-way valve, and the discharge port of the low-pressure variable flow compressor is connected to the inlet of the second one-way valve. The outlet of the first check valve, the outlet of the second check valve, and the shell-side outlet of the intercooler are connected in parallel and then connected to the suction port of the high-pressure variable flow compressor. The discharge port of the high-pressure variable flow compressor is connected to the inlet of the condenser. The outlet of the condenser is connected to the inlet of the throttle valve and the pipe-side inlet of the intercooler, respectively. The outlet of the throttle valve is connected to the shell-side inlet of the intercooler. When the load is small, the low-pressure variable flow compressor and the high-pressure variable flow compressor work simultaneously. When the load is large, the low-pressure constant flow compressor, the low-pressure variable flow compressor, and the high-pressure variable flow compressor work simultaneously. When a low refrigerant flow is required, the low-pressure variable flow compressor and the high-pressure variable flow compressor work simultaneously, and the low-pressure constant flow compressor stops. When an intermediate refrigerant flow is required, the low-pressure constant flow compressor and the high-pressure variable flow compressor work simultaneously, and the low-pressure variable flow compressor stops. When a high refrigerant flow is required, the low-pressure constant flow compressor, the high-pressure variable flow compressor, and the low-pressure variable flow compressor work simultaneously.

[0004] The patent document discloses a two-stage compression refrigeration system with incomplete cooling during throttling. Due to the use of dual-machine compression, it achieves low refrigeration temperatures and is suitable for low-temperature frozen storage systems. However, when used in variable flow or pulsating flow scenarios, it cannot guarantee that the gas flow state within the pipeline will remain stable for a very short time, resulting in large pressure fluctuations. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this invention provides a variable flow pulsating flow pressure balancing system. When used in variable flow or pulsating flow scenarios, this invention can effectively reduce pressure fluctuations, ensure that the gas flow state in the pipeline is stable in a very short time, and improve measurement accuracy.

[0006] This invention is achieved through the following technical solution:

[0007] A variable flow pulsating pressure balancing system includes a pressure-stabilized gas source, characterized in that it further includes a main pipeline, a variable flow pulsating pressure balancer, a first pressure transmitter, a gas flow meter, a first gas flow pipe, a synchronization valve, a second pressure transmitter, a second gas flow pipe, and a throttling valve. The gas flow meter and the synchronization valve are installed on the first gas flow pipe, which has a first pressure tap and a second pressure tap. One end of the main pipeline is connected to the pressure-stabilized gas source, and the other end is connected to the inlet of the variable flow pulsating pressure balancer. The outlet of the variable flow pulsating pressure balancer is connected to the first and second pressure taps, respectively. The first pressure transmitter is installed on the first pressure tap, and the second pressure transmitter is installed on the second pressure tap. The throttling valve is installed on the second gas flow pipe and is located at the second pressure tap.

[0008] The variable flow pulsating pressure balancer includes a hollow shell, a drive mechanism, and a reversing component. The hollow shell is provided with a useful air channel and a bypass channel. The drive mechanism is located outside the hollow shell, and the reversing component is located inside the hollow shell. The reversing component is connected to the drive mechanism, and the drive mechanism drives the reversing component to move up and down reciprocatingly.

[0009] The drive mechanism drives the commutator to move upward, opening the bypass channel and closing the air supply channel.

[0010] The drive mechanism drives the reversing component to move downward, opening the air passage and closing the bypass passage.

[0011] The gas supply channel and the bypass channel are arranged side by side inside the hollow shell.

[0012] The drive mechanism is a cylinder or a servo motor.

[0013] The first pressure transmitter is equipped with a first pressure value display.

[0014] The second pressure transmitter is equipped with a second pressure value display.

[0015] The beneficial effects of this invention are mainly reflected in the following aspects:

[0016] 1. In this invention, a gas flow meter and a synchronization valve are installed on a first gas flow pipe, which has a first pressure tap and a second pressure tap on a second gas flow pipe. One end of the main pipeline is connected to a pressure-stabilized gas source, and the other end is connected to the inlet of a variable flow pulsating flow pressure balancer. The outlet of the variable flow pulsating flow pressure balancer is connected to the first and second pressure taps respectively. A first pressure transmitter is installed on the first pressure tap, and a second pressure transmitter is installed on the second pressure tap. A throttle valve is installed on the second gas flow pipe at the second pressure tap. Compared with the prior art, this invention can effectively reduce pressure fluctuations in variable flow or pulsating flow scenarios, ensure that the gas flow state in the pipeline is stable in a very short time, and improve measurement accuracy.

[0017] 2. When used in variable flow or pulsating flow scenarios, this invention can stabilize the gas flow state in the pipeline within a very short time, unaffected by the number of times it is opened and closed, thus ensuring the gas supply requirements of specific locations with variable flow or pulsating flow, and effectively reducing measurement errors caused by pressure fluctuations.

[0018] 3. Compared with the prior art, the present invention can avoid the possibility of pressure buildup in the pipeline caused by the sudden closure of the pneumatic valve in the traditional pipeline, which may damage the pressure sensor or flow meter.

[0019] 4. In this invention, the switching time of the reversing component to switch to the gas consumption channel or the bypass channel is very short, ranging from a few milliseconds to tens of milliseconds. Moreover, the speed can be adjusted as needed, and the throttle valve can be precisely indicated to make the pressure values ​​of the two channels equal. This achieves the same pressure loss of the bypass channel as that of the gas consumption channel, and the flow rate is also consistent. The operation is convenient and reliable.

[0020] 5. In this invention, the bypass pipeline formed by the bypass channel is for recovery or venting, and its pressure loss is definitely less than that of the gas pipeline formed by the gas consumption channel. Therefore, by setting a throttle valve, the pressure loss of the bypass pipeline can be increased, which is convenient for adjustment. Attached Figure Description

[0021] The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the variable flow pulsating flow pressure balancer of the present invention;

[0024] The diagram shows the following markings: 1. Regulated gas source, 2. Main pipeline, 3. Variable flow pulsating flow pressure balancer, 4. First pressure transmitter, 5. Gas flow meter, 6. First gas flow pipe, 7. Synchronization valve, 8. Second pressure transmitter, 9. Second gas flow pipe, 10. Throttling valve, 11. First pressure tap, 12. Second pressure tap, 13. Hollow housing, 14. Drive mechanism, 15. Reversing component, 16. Gas consumption channel, 17. Bypass channel, 18. First pressure value display, 19. Second pressure value display. Detailed Implementation

[0025] Example 1

[0026] See Figure 1 A variable flow pulsating flow pressure balancing system includes a stabilizing gas source 1, a main pipeline 2, a variable flow pulsating flow pressure balancer 3, a first pressure transmitter 4, a gas flow meter 5, a first gas flow pipe 6, a synchronization valve 7, a second pressure transmitter 8, a second gas flow pipe 9, and a throttle valve 10. The gas flow meter 5 and the synchronization valve 7 are installed on the first gas flow pipe 6, which has a first pressure tap 11, and the second gas flow pipe 9 has a second pressure tap 12. One end of the main pipeline 2 is connected to the stabilizing gas source 1, and the other end is connected to the inlet of the variable flow pulsating flow pressure balancer 3. The outlet of the variable flow pulsating flow pressure balancer 3 is connected to the first pressure tap 11 and the second pressure tap 12, respectively. The first pressure transmitter 4 is installed on the first pressure tap 11, the second pressure transmitter 8 is installed on the second pressure tap 12, and the throttle valve 10 is installed on the second gas flow pipe 9 at the second pressure tap 12.

[0027] This embodiment is the most basic implementation. The gas flow meter 5 and the synchronization valve 7 are installed on the first gas flow pipe 6. The first gas flow pipe 6 is provided with a first pressure tap 11, and the second gas flow pipe 9 is provided with a second pressure tap 12. One end of the main pipeline 2 is connected to the pressure stabilizing gas source 1, and the other end of the main pipeline 2 is connected to the inlet end of the variable flow pulsating flow pressure balancer 3. The outlet end of the variable flow pulsating flow pressure balancer 3 is connected to the first pressure tap 11 and the second pressure tap 12 respectively. The first pressure transmitter 4 is installed on the first pressure tap 11, and the second pressure transmitter 8 is installed on the second pressure tap 12. The throttle valve 10 is installed on the second gas flow pipe 9 and is located at the second pressure tap 12. Compared with the prior art, when used in variable flow or pulsating flow scenarios, it can effectively reduce pressure fluctuations, ensure that the gas flow state in the pipeline is stable in a very short time, and improve measurement accuracy.

[0028] Example 2

[0029] See Figure 1 and Figure 2A variable flow pulsating flow pressure balancing system includes a stabilizing gas source 1, a main pipeline 2, a variable flow pulsating flow pressure balancer 3, a first pressure transmitter 4, a gas flow meter 5, a first gas flow pipe 6, a synchronization valve 7, a second pressure transmitter 8, a second gas flow pipe 9, and a throttle valve 10. The gas flow meter 5 and the synchronization valve 7 are installed on the first gas flow pipe 6, which has a first pressure tap 11, and the second gas flow pipe 9 has a second pressure tap 12. One end of the main pipeline 2 is connected to the stabilizing gas source 1, and the other end is connected to the inlet of the variable flow pulsating flow pressure balancer 3. The outlet of the variable flow pulsating flow pressure balancer 3 is connected to the first pressure tap 11 and the second pressure tap 12, respectively. The first pressure transmitter 4 is installed on the first pressure tap 11, the second pressure transmitter 8 is installed on the second pressure tap 12, and the throttle valve 10 is installed on the second gas flow pipe 9 at the second pressure tap 12.

[0030] Preferably, the variable flow pulsating pressure balancer 3 includes a hollow housing 13, a drive mechanism 14, and a reversing component 15. The hollow housing 13 is provided with a useful air channel 16 and a bypass channel 17. The drive mechanism 14 is located outside the hollow housing 13, and the reversing component 15 is located inside the hollow housing 13. The reversing component 15 is connected to the drive mechanism 14, and the drive mechanism 14 drives the reversing component 15 to perform up-and-down reciprocating motion.

[0031] This embodiment is a preferred implementation method. When used in variable flow or pulsating flow scenarios, it can keep the gas flow state in the pipeline stable in a very short time, unaffected by the number of times it is turned on and off, thus ensuring the gas requirements of specific locations with variable flow or pulsating flow and effectively reducing measurement errors caused by pressure fluctuations.

[0032] Example 3

[0033] See Figure 1 and Figure 2 A variable flow pulsating flow pressure balancing system includes a stabilizing gas source 1, a main pipeline 2, a variable flow pulsating flow pressure balancer 3, a first pressure transmitter 4, a gas flow meter 5, a first gas flow pipe 6, a synchronization valve 7, a second pressure transmitter 8, a second gas flow pipe 9, and a throttle valve 10. The gas flow meter 5 and the synchronization valve 7 are installed on the first gas flow pipe 6, which has a first pressure tap 11, and the second gas flow pipe 9 has a second pressure tap 12. One end of the main pipeline 2 is connected to the stabilizing gas source 1, and the other end is connected to the inlet of the variable flow pulsating flow pressure balancer 3. The outlet of the variable flow pulsating flow pressure balancer 3 is connected to the first pressure tap 11 and the second pressure tap 12, respectively. The first pressure transmitter 4 is installed on the first pressure tap 11, the second pressure transmitter 8 is installed on the second pressure tap 12, and the throttle valve 10 is installed on the second gas flow pipe 9 at the second pressure tap 12.

[0034] The variable flow pulsating pressure balancer 3 includes a hollow shell 13, a drive mechanism 14, and a reversing component 15. The hollow shell 13 is provided with a useful air channel 16 and a bypass channel 17. The drive mechanism 14 is located outside the hollow shell 13, and the reversing component 15 is located inside the hollow shell 13. The reversing component 15 is connected to the drive mechanism 14, and the drive mechanism 14 drives the reversing component 15 to move up and down reciprocatingly.

[0035] More preferably, the drive mechanism 14 drives the reversing member 15 to move upward, opening the bypass channel 17 and closing the air supply channel 16.

[0036] The drive mechanism 14 drives the reversing member 15 to move downward, opening the air passage 16 and closing the bypass passage 17.

[0037] This embodiment is another preferred implementation method. Compared with the prior art, it can avoid the possibility of pressure buildup in the pipeline caused by the sudden closure of the traditional pipeline pneumatic valve, which could damage the pressure sensor or flow meter.

[0038] Example 4

[0039] See Figure 1 and Figure 2 A variable flow pulsating flow pressure balancing system includes a stabilizing gas source 1, a main pipeline 2, a variable flow pulsating flow pressure balancer 3, a first pressure transmitter 4, a gas flow meter 5, a first gas flow pipe 6, a synchronization valve 7, a second pressure transmitter 8, a second gas flow pipe 9, and a throttle valve 10. The gas flow meter 5 and the synchronization valve 7 are installed on the first gas flow pipe 6, which has a first pressure tap 11, and the second gas flow pipe 9 has a second pressure tap 12. One end of the main pipeline 2 is connected to the stabilizing gas source 1, and the other end is connected to the inlet of the variable flow pulsating flow pressure balancer 3. The outlet of the variable flow pulsating flow pressure balancer 3 is connected to the first pressure tap 11 and the second pressure tap 12, respectively. The first pressure transmitter 4 is installed on the first pressure tap 11, the second pressure transmitter 8 is installed on the second pressure tap 12, and the throttle valve 10 is installed on the second gas flow pipe 9 at the second pressure tap 12.

[0040] The variable flow pulsating pressure balancer 3 includes a hollow shell 13, a drive mechanism 14, and a reversing component 15. The hollow shell 13 is provided with a useful air channel 16 and a bypass channel 17. The drive mechanism 14 is located outside the hollow shell 13, and the reversing component 15 is located inside the hollow shell 13. The reversing component 15 is connected to the drive mechanism 14, and the drive mechanism 14 drives the reversing component 15 to move up and down reciprocatingly.

[0041] The drive mechanism 14 drives the reversing component 15 to move upward, opening the bypass channel 17 and closing the gas supply channel 16.

[0042] The drive mechanism 14 drives the reversing member 15 to move downward, opening the air passage 16 and closing the bypass passage 17.

[0043] More preferably, the gas passage 16 and the bypass passage 17 are arranged side by side inside the hollow shell 13.

[0044] The drive mechanism 14 is a cylinder or a servo motor.

[0045] This embodiment is another preferred implementation. The switching time of the reversing component 15 to switch to the gas consumption channel 16 or the bypass channel 17 is very short, ranging from a few milliseconds to tens of milliseconds. Moreover, the speed can be adjusted as needed, and the throttle valve 10 can be precisely indicated to make the pressure values ​​of the two channels equal. This achieves the same pressure loss and flow rate as the gas consumption channel 16, making the operation convenient and reliable.

[0046] Example 5

[0047] See Figure 1 and Figure 2 A variable flow pulsating flow pressure balancing system includes a stabilizing gas source 1, a main pipeline 2, a variable flow pulsating flow pressure balancer 3, a first pressure transmitter 4, a gas flow meter 5, a first gas flow pipe 6, a synchronization valve 7, a second pressure transmitter 8, a second gas flow pipe 9, and a throttle valve 10. The gas flow meter 5 and the synchronization valve 7 are installed on the first gas flow pipe 6, which has a first pressure tap 11, and the second gas flow pipe 9 has a second pressure tap 12. One end of the main pipeline 2 is connected to the stabilizing gas source 1, and the other end is connected to the inlet of the variable flow pulsating flow pressure balancer 3. The outlet of the variable flow pulsating flow pressure balancer 3 is connected to the first pressure tap 11 and the second pressure tap 12, respectively. The first pressure transmitter 4 is installed on the first pressure tap 11, the second pressure transmitter 8 is installed on the second pressure tap 12, and the throttle valve 10 is installed on the second gas flow pipe 9 at the second pressure tap 12.

[0048] The variable flow pulsating pressure balancer 3 includes a hollow shell 13, a drive mechanism 14, and a reversing component 15. The hollow shell 13 is provided with a useful air channel 16 and a bypass channel 17. The drive mechanism 14 is located outside the hollow shell 13, and the reversing component 15 is located inside the hollow shell 13. The reversing component 15 is connected to the drive mechanism 14, and the drive mechanism 14 drives the reversing component 15 to move up and down reciprocatingly.

[0049] The drive mechanism 14 drives the reversing component 15 to move upward, opening the bypass channel 17 and closing the gas supply channel 16.

[0050] The drive mechanism 14 drives the reversing member 15 to move downward, opening the air passage 16 and closing the bypass passage 17.

[0051] The gas supply channel 16 and the bypass channel 17 are arranged side by side inside the hollow shell 13.

[0052] The drive mechanism 14 is a cylinder or a servo motor.

[0053] The first pressure transmitter 4 is equipped with a first pressure value display 18.

[0054] The second pressure transmitter 8 is equipped with a second pressure value display 19.

[0055] This embodiment is the best implementation method. The bypass pipeline formed by the bypass channel 17 is for recovery or venting, and its pressure loss is definitely less than that of the gas pipeline formed by the gas channel 16. Therefore, by setting the throttle valve 10, the pressure loss of the bypass pipeline can be increased, which is convenient for adjustment.

[0056] The working principle of this invention is as follows:

[0057] In use, the synchronous valve 7 of the gas consumption channel 16 and the reversing component 15 are linked by the variable flow pulsating pressure balancer 3. The reversing component 15 ensures that only one of the gas consumption channel 16 and the bypass channel 17 can be open and the other closed. The pressure of the gas consumption channel 16 is measured by the first pressure transmitter 4 of the gas consumption channel 16 and used as the standard for pressure adjustment of the bypass channel 17. The second pressure transmitter 8 is the bypass channel pressure transmitter, which is used to indicate the adjustment amount of the bypass channel throttle valve 10. When the throttle valve 10 operates to a certain opening degree, so that the pressure value at this point is consistent with the pressure value at the corresponding point of the gas consumption channel 16, the pressure loss of the two channels is consistent, and the flow rate is also consistent.

[0058] When the reversing element 15 switches to the air consumption channel 16, the air consumption channel 16 opens and the bypass channel closes. The pressure value P1 of the air consumption channel 16 is measured and recorded. When the reversing element 15 switches to the bypass channel, the bypass channel 17 opens and the air consumption channel 16 closes. Observe whether the pressure value P2 of the bypass channel 17 is equal to the pressure value P1 of the air consumption channel 16. If P2 ≠ P1, adjust the throttle valve 10 until P2 = P1. The pressures at both points are consistent, and the output flow rate and pressure are the same regardless of which channel is switched to or when the switch is made.

Claims

1. A variable flow pulsating pressure balancing system, comprising a pressure-stabilizing gas source (1), characterized in that: It also includes a main pipeline (2), a variable flow pulsating pressure balancer (3), a first pressure transmitter (4), a gas flow meter (5), a first gas flow pipe (6), a synchronization valve (7), a second pressure transmitter (8), a second gas flow pipe (9), and a throttle valve (10). The gas flow meter (5) and the synchronization valve (7) are installed on the first gas flow pipe (6). The first gas flow pipe (6) is provided with a first pressure tap (11), and the second gas flow pipe (9) is provided with a second pressure tap (12). One end of the main pipeline (2) is connected to... The pressure-stabilizing gas source (1) is connected, and the other end of the main pipeline (2) is connected to the inlet end of the variable flow pulsating flow pressure balancer (3). The outlet end of the variable flow pulsating flow pressure balancer (3) is connected to the first pressure tap (11) and the second pressure tap (12) respectively. The first pressure transmitter (4) is installed on the first pressure tap (11), and the second pressure transmitter (8) is installed on the second pressure tap (12). The throttle valve (10) is installed on the second airflow pipe (9) and is located at the second pressure tap (12). The variable flow pulsating flow pressure balancer (3) includes a hollow shell (13), a drive mechanism (14), and a reversing element (15). The hollow shell (13) contains a useful air passage (16) and a bypass passage (17). The drive mechanism (14) is located outside the hollow shell (13), and the reversing element (15) is located inside the hollow shell (13). The reversing element (15) is connected to the drive mechanism (14), and the drive mechanism (14) drives the reversing element (15) to reciprocate up and down. The variable flow pulsating flow pressure balancer (3) is activated by the variable flow pulsating flow pressure balancer. The balancer (3) links the synchronization valve (7) of the gas channel (16) with the reversing component (15). The reversing component (15) ensures that only one of the gas channel (16) and the bypass channel (17) can be open and the other closed. The pressure of the gas channel (16) is measured by the first pressure transmitter (4) of the gas channel (16) as the standard for regulating the pressure of the bypass channel (17). The second pressure transmitter (8) is the bypass channel pressure transmitter, which is used to indicate the adjustment amount of the bypass channel throttle valve (10).

2. The variable flow pulsating flow pressure balancing system according to claim 1, characterized in that: The drive mechanism (14) drives the reversing member (15) to move upward, opening the bypass channel (17) and closing the gas channel (16).

3. The variable flow pulsating flow pressure balancing system according to claim 1, characterized in that: The drive mechanism (14) drives the reversing member (15) to move downward, opening the air passage (16) and closing the bypass passage (17).

4. The variable flow pulsating flow pressure balancing system according to claim 1, characterized in that: The gas supply channel (16) and the bypass channel (17) are arranged side by side inside the hollow shell (13).

5. A variable flow pulsating flow pressure balancing system according to claim 2, characterized in that: The drive mechanism (14) is a cylinder or a servo motor.

6. The variable flow pulsating flow pressure balancing system according to claim 1, characterized in that: The first pressure transmitter (4) is equipped with a first pressure value display (18).

7. The variable flow pulsating flow pressure balancing system according to claim 1, characterized in that: The second pressure transmitter (8) is equipped with a second pressure value display (19).

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