A gas system pressure stabilizing device

Abstract

This invention provides a gas system pressure stabilizing device. By setting up a high-pressure gas storage chamber, excess high-pressure gas in the system is stored and released back into the system when the gas system pressure drops, thereby stabilizing the gas system pressure and achieving "peak shaving and valley filling". The gas system pressure stabilizing device includes a high-pressure gas storage chamber and a buffer chamber separated by a partition. The upstream gas supply end of the gas system is connected to the buffer chamber via an inlet pipe equipped with a regulating valve, and an outlet pipe connected to the downstream gas consumption end is also connected to the buffer chamber. The partition is respectively equipped with a gas storage check valve and a gas release check valve. When the pressure in the buffer chamber is greater than the pressure in the high-pressure gas storage chamber, the gas storage check valve opens, allowing gas to flow from the buffer chamber to the high-pressure gas storage chamber for storage. When the pressure difference between the high-pressure gas storage chamber and the buffer chamber reaches the opening pressure of the gas release check valve, the gas release check valve opens, allowing gas to flow from the high-pressure gas storage chamber to the buffer chamber.

Description

Technical Field

[0001] This invention relates to a pressure stabilizing device, specifically a pressure stabilizing device for a gas system, and belongs to the field of gas transportation technology. Background Technology

[0002] In existing technologies, there are generally two methods for maintaining system pressure in gas transmission process piping systems:

[0003] Method 1: Set up a regulating valve in the system and stabilize the pressure at the downstream user end by adjusting the opening of the regulating valve. The disadvantage of this method is that the valve regulation requires a buffering time and cannot cope with instantaneous pressure fluctuations. Moreover, the valve regulation can only take into account the pressure stability of the upstream or downstream. When the pressure or flow changes instantaneously, it cannot take into account both upstream and downstream at the same time, and cannot achieve pressure stability of the entire system.

[0004] Method 2: Install an air storage tank in the system to reduce the fluctuation range of flow and pressure; the disadvantage of this method is that a large air storage tank is usually required in a system with large fluctuations, which increases the footprint and material consumption. Summary of the Invention

[0005] In view of this, the present invention provides a gas system pressure stabilizing device, which stores excess high-pressure gas in the system by setting up a high-pressure gas storage chamber, and releases it back into the system when the gas system is at low pressure, so as to stabilize the gas system pressure and achieve "peak shaving and valley filling".

[0006] The technical solution of the present invention is: a gas system pressure stabilizing device, comprising: a high-pressure gas storage chamber and a buffer chamber separated by a partition;

[0007] The upstream gas supply end of the gas system is connected to the buffer chamber through an inlet pipe equipped with a regulating valve, and the outlet pipe connected to the downstream gas consumption end is also connected to the buffer chamber.

[0008] The partition is equipped with a gas storage check valve and a gas release check valve respectively.

[0009] When the pressure inside the buffer chamber is greater than the pressure inside the high-pressure gas storage chamber, the gas storage one-way valve opens, allowing gas to flow from the buffer chamber to the high-pressure gas storage chamber for storage.

[0010] When the pressure difference between the high-pressure gas storage chamber and the buffer chamber reaches the opening pressure of the gas release check valve, the gas release check valve opens, allowing gas to flow from the high-pressure gas storage chamber to the buffer chamber.

[0011] In a preferred embodiment of the present invention, the upstream air supply end is connected to the buffer chamber via a quick-opening air supply pipe equipped with a bypass check valve; the connection end of the quick-opening air supply pipe and the upstream air supply end is located upstream of the regulating valve in the air inlet pipe.

[0012] When the difference between the gas pressure in the quick-opening gas supply pipe and the gas pressure in the buffer chamber is greater than the starting pressure of the bypass check valve, the bypass check valve opens to supply emergency gas to the buffer chamber.

[0013] In a preferred embodiment of the present invention, a safety valve is provided on the wall of the high-pressure gas storage chamber.

[0014] In a preferred embodiment of the present invention, the gas system pressure stabilizing device is located upstream of the compressor, and the compressor serves as the downstream gas-consuming end.

[0015] In a preferred embodiment of the present invention, the release check valve is a check valve equipped with a counterweight, and the starting pressure of the release check valve is adjusted by adjusting the weight of the counterweight.

[0016] In a preferred embodiment of the present invention, the bypass check valve is a check valve equipped with a counterweight, and the starting pressure of the bypass check valve is adjusted by adjusting the weight of the counterweight.

[0017] Beneficial effects:

[0018] (1) The gas system pressure stabilizing device of the present invention uses a diaphragm + one-way valve to take out the excess high-pressure gas in the gas supply system and store it in a high-pressure gas storage chamber. When the gas supply system is at low pressure, it is released back into the gas supply system to stabilize the gas supply system pressure, realize "peak shaving and valley filling", realize the safety of the entire gas supply system, reduce the risks caused by pressure fluctuations in system pipes and equipment, and effectively control and improve the hazards such as vibration, noise and material fatigue caused by pressure fluctuations in the original pipeline gas supply system. Moreover, compared with conventional gas storage tanks, the present invention uses a high-pressure gas storage chamber, which reduces the volume and material usage (that is, compared with conventional gas storage tanks of the same volume without a high-pressure gas storage chamber, the present invention uses a high-pressure gas storage chamber, which makes the gas storage capacity larger).

[0019] (2) The gas system pressure stabilizing device of the present invention can buffer the pressure and flow fluctuations in the gas pipeline system in a fast and reliable manner by configuring a "bypass" or quick-opening gas supply pipe for the gas inlet pipe, thereby improving the stability and reliability of the gas pipeline system.

[0020] (3) The gas system pressure stabilizing device of the present invention can be used upstream of the compressor, that is, the compressor is the downstream gas user; thereby improving the operating conditions of the compressor, reducing surge effect, reducing outlet backflow, and improving equipment energy efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the gas system pressure stabilizing device of the present invention;

[0022] Figure 2 This is a comparison chart of the pressure curve after using the gas system pressure stabilizing device of the present invention and the original pressure curve;

[0023] Wherein: 1-High-pressure gas storage chamber; 2-Buffer chamber; 5-Baffle; 6-Safety valve; 7-Gas storage check valve; 8-Gas release check valve; 9-Bypass check valve; 10-Quick-opening gas supply pipe; 11-Inlet pipe; 12-Outlet pipe; 13-Regulating valve. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Example 1:

[0026] This embodiment provides a gas system pressure stabilizing device applied to a gas delivery system. It can improve the pressure stability of the gas delivery system and buffer the imbalance of consumption and pressure between the downstream gas user and the upstream gas supplier to maintain the overall pressure stability of the system.

[0027] like Figure 1 As shown, the gas system pressure stabilizing device includes: a high-pressure gas storage chamber 1, a buffer chamber 2, a partition 5, a gas storage check valve 7, and a gas release check valve 8; the high-pressure gas storage chamber 1 and the buffer chamber 2 are separated by the partition 5; or a gas storage chamber can be divided into two chambers by the partition 5, which serve as the high-pressure gas storage chamber 1 and the buffer chamber 2 respectively.

[0028] A gas storage check valve 7 and a gas release check valve 8 are respectively installed on the partition 5. The gas storage check valve 7 is used to allow gas to flow from the buffer chamber 2 to the high-pressure gas storage chamber 1; the gas release check valve 8 is used to allow gas to flow from the high-pressure gas storage chamber 1 to the buffer chamber 2. As an example, the gas release check valve 8 is located above the gas storage check valve 7. By setting the starting pressure of the gas release check valve 8, the high-pressure gas storage chamber 1 is allowed to store gas at a pressure higher than the system pressure (i.e., the gas pressure in the high-pressure gas storage chamber 1 is allowed to be greater than the gas pressure in the buffer chamber 2). Therefore, when the pressure difference across the partition 5 does not reach the set pressure difference value (i.e., the starting pressure of the gas release check valve 8), the gas release check valve 8 will not open, so as to maintain the pressure in the high-pressure gas storage chamber 1 being greater than the pressure in the buffer chamber 2; thereby storing excess high-pressure gas in the gas system.

[0029] As an example, the release check valve 8 is a check valve equipped with a counterweight, that is, the "pressure difference" is achieved by the "counterweight" method. The "starting pressure" of the release check valve 8 can be easily adjusted by adjusting the size (weight) of the counterweight.

[0030] A safety valve 6 is installed on the wall of the high-pressure gas storage chamber 1. When the pressure inside the high-pressure gas storage chamber 1 is too high (reaching the working pressure of the safety valve 6), the safety valve 6 will automatically open to release pressure.

[0031] The upstream gas supply end is connected to the buffer chamber 2 through the inlet pipe 11 equipped with the regulating valve 13, and the outlet pipe 12 connected to the downstream gas user end is connected to the buffer chamber 2.

[0032] The working principle of this gas system pressure stabilizing device is as follows:

[0033] Under normal circumstances, both the gas storage check valve 7 and the gas release check valve 8 are closed. The gas in the upstream gas supply end passes through the regulating valve 13, enters the buffer chamber 2 through the inlet pipe 11, and is then directly transported to the downstream gas user end through the outlet pipe 12.

[0034] When the gas consumption at the downstream end decreases, causing the pressure of the gas supply system to increase (at this time, the pressure in the inlet pipe 11, buffer chamber 2 and outlet pipe 12 increases), that is, the pressure in the buffer chamber 2 is greater than the pressure in the high-pressure gas storage chamber 1, when the pressure difference is greater than the working pressure of the gas storage check valve 7, the gas storage check valve 7 will automatically open under the action of the pressure difference, and the excess high-pressure gas will enter the high-pressure gas storage chamber 1 for storage through the gas storage check valve 7.

[0035] Because the release check valve 8 has a counterweight, the high-pressure gas storage chamber 1 is allowed to store gas at a pressure higher than that of the gas supply system. When the pressure difference between the left and right sides of the partition 5 does not reach the set pressure difference value, the release check valve 8 will not open, so as to maintain the pressure in the high-pressure gas storage chamber 1 greater than the pressure in the buffer chamber 2.

[0036] When the gas consumption at the downstream gas end increases, causing the gas supply system pressure to decrease (at this time, the pressure in the inlet pipe 11, buffer chamber 2, and outlet pipe 12 decreases), when the gas supply system pressure decreases to the point where the pressure difference on both sides of the partition 5 is greater than the starting pressure of the release check valve 8, the release check valve 8 automatically opens, and the gas in the high-pressure gas storage chamber 1 is released through the release check valve 8 and replenished into the buffer chamber 2 to enter the gas supply system in order to maintain the stability of the gas supply system pressure.

[0037] When the high-pressure gas storage chamber 1 has a large amount of gas stored in it, and the pressure inside the high-pressure gas storage chamber 1 reaches the set value, the upstream gas supply end stops supplying gas. When the pressure of the gas supply system drops to the point where the pressure difference between the two sides of the partition 5 is greater than the starting pressure of the release check valve 8, the release check valve 8 automatically opens and releases gas to the low-pressure side (i.e., the buffer chamber 2 side).

[0038] A comparison of the pressure curve after using the gas system pressure stabilizing device of the present invention with the original pressure curve. Figure 2 As shown, this gas pressure stabilizing device uses a diaphragm and mechanical valve to extract excess high-pressure gas from the gas supply system and store it in a high-pressure gas storage chamber 1. When the gas supply system experiences low pressure, the excess gas is released back into the system to stabilize the pressure and achieve peak shaving and valley filling. Compared to traditional pressure stabilization methods such as regulating valves and gas tanks, this device can quickly respond to fluctuations in the flow and pressure of the gas supply system and provides a more efficient buffer capacity.

[0039] This gas system pressure stabilizing device can be used upstream of a compressor, where the compressor is the downstream gas consumer. This improves compressor operating conditions, reduces surge, decreases outlet backflow, and increases equipment efficiency. The device can also be used in conventional gas process systems to stabilize system operating pressure fluctuations, improve system working conditions, and enhance system safety and reliability.

[0040] Example 2:

[0041] Based on the above embodiment 1, a quick-opening gas supply pipe 10 is further added for "emergency" gas supply when the gas consumption at the downstream gas consumption end increases instantaneously, so as to maintain the pressure stability of the gas supply system.

[0042] The upstream gas supply end is connected to the buffer chamber 2 via a quick-opening gas supply pipe 10 equipped with a bypass check valve 9; and the connection end of the quick-opening gas supply pipe 10 and the upstream gas supply end is located upstream of the regulating valve 13 in the air inlet pipe 11. As an example, the bypass check valve 9 is located at the end of the quick-opening gas supply pipe 10 where it extends into the buffer chamber 2. The bypass check valve 9 allows the gas pressure in the quick-opening gas supply pipe 10 to be greater than the gas pressure in the buffer chamber 2, that is, when the difference between the gas pressure in the quick-opening gas supply pipe 10 and the gas pressure in the buffer chamber 2 is greater than the starting pressure of the bypass check valve 9, the bypass check valve 9 opens, supplying gas to the buffer chamber 2.

[0043] As an example, the bypass check valve 9 is a check valve equipped with a counterweight, that is, the "pressure difference" is achieved by the "counterweight" method. The "starting pressure" of the bypass check valve 9 can be easily adjusted by adjusting the size (weight) of the counterweight.

[0044] Therefore, when the gas consumption at the downstream gas consumption end increases suddenly, and the regulating valve 13 cannot adjust in time, causing the pressure in the buffer chamber 2 to drop rapidly (at this time, the pressure in the high-pressure gas storage chamber 1 and the quick-opening gas supply pipe 10 are both greater than the pressure in the buffer chamber 2), the gas release check valve 8 automatically opens to release the gas in the high-pressure gas storage chamber 1. At the same time, the bypass check valve 9 also opens rapidly and simultaneously, introducing gas directly from upstream of the regulating valve 13 into the buffer chamber 2 for "emergency" gas replenishment to maintain the pressure stability of the gas supply system.

[0045] The venting check valve 8 and the bypass check valve 9 can be activated in the same way or differently, and their opening pressure values ​​can be set according to the usage requirements.

[0046] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A gas system pressure stabilizing device, characterized in that: Used to buffer the imbalance of consumption and pressure between the downstream gas consumption end and the upstream gas supply end; including a high-pressure gas storage chamber (1) and a buffer chamber (2) separated by a partition (5). The upstream gas supply end of the gas system is connected to the buffer chamber (2) through the inlet pipe (11) equipped with the regulating valve (13), and the outlet pipe (12) connected to the downstream gas user end is connected to the buffer chamber (2). The partition (5) is respectively provided with a gas storage check valve (7) and a gas release check valve (8); When the gas consumption at the downstream gas consumption end decreases, causing the pressure in the buffer chamber (2) to be greater than the pressure in the high-pressure gas storage chamber (1), the gas storage check valve (7) opens, allowing gas to flow from the buffer chamber (2) to the high-pressure gas storage chamber (1), storing the excess gas in the gas system at a pressure higher than that of the gas supply system. When the gas consumption at the downstream gas consumption end increases, causing the pressure difference between the high-pressure gas storage chamber (1) and the buffer chamber (2) to reach the opening pressure of the gas release check valve (8), the gas release check valve (8) opens, allowing gas to flow from the high-pressure gas storage chamber (1) to the buffer chamber (2) and enter the gas supply system to maintain the pressure stability of the gas supply system. The gas release check valve (8) is a check valve with a counterweight. The starting pressure of the gas release check valve (8) can be adjusted by adjusting the weight of the counterweight.

2. The gas system pressure stabilizing device as described in claim 1, characterized in that: The upstream air supply end is connected to the buffer chamber (2) through a quick-opening air supply pipe (10) equipped with a bypass check valve (9); the connection end of the quick-opening air supply pipe (10) and the upstream air supply end is located upstream of the regulating valve (13) in the air inlet pipe (11); When the difference between the gas pressure in the quick-opening gas supply pipe (10) and the gas pressure in the buffer chamber (2) is greater than the starting pressure of the bypass check valve (9), the bypass check valve (9) opens to provide emergency gas supply to the buffer chamber (2).

3. The gas system pressure stabilizing device as described in claim 1 or 2, characterized in that: The high-pressure gas storage chamber (1) is equipped with a safety valve (6) on its wall.

4. The gas system pressure stabilizing device as described in claim 1 or 2, characterized in that: The gas system pressure stabilizing device is located upstream of the compressor, which serves as the downstream gas user.

5. The gas system pressure stabilizing device as described in claim 2, characterized in that: The bypass check valve (9) is a check valve with a counterweight. The starting pressure of the bypass check valve (9) can be adjusted by adjusting the weight of the counterweight.

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