Anti-surge valve for compressor

Abstract

The anti-surge valve comprises a valve body and connecting mechanisms, and the connecting mechanisms are arranged on the left side and the right side of the valve body respectively. The valve body further comprises a shell, a drainage mechanism and a pressure regulating mechanism, the drainage mechanism is arranged on the left side of the shell, and the pressure regulating mechanism is arranged in the shell; the connecting mechanism further comprises a connecting flange and a connector, and the connector is arranged on the outer side of the connecting flange. According to the utility model, only one person is needed to complete installation and disassembly, so that time and labor are saved; the water draining mechanism is arranged, so that accumulated water accumulated in the valve body can be drained in time; and the air inlet flow pressure of the surge upper and lower limit ranges is controlled, and the structure is simple and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the anti-surge valve technical field, especially a kind of anti-surge valve for compressor. BACKGROUND

[0002] In the centrifugal compressor use process, when the air flow reduces to the surge limit flow or is more than the surge limit flow, the airflow instability phenomenon occurs, which is manifested as the periodic fluctuation of flow and pressure. This phenomenon can cause the airflow separation and reattachment in the compressor, forming a vicious cycle, which may cause equipment damage and system failure in use. Generally, an anti-surge valve is provided at the air inlet to prevent the occurrence of surge phenomenon.

[0003] In the prior art, such as a kind of anti-surge valve disclosed in Chinese patent (CN213629181U), including valve body, valve rod and valve plate assembly arranged in the inner cavity of valve body, cylinder connected with valve rod, lower end cover arranged at the bottom of valve body, one end of the valve rod is connected with the cylinder, the other end is connected with the valve plate assembly, the connection between the valve rod and the inner cavity of valve body is provided with control mechanism for preventing surge, the control mechanism cooperates with valve opening and closing. The utility model designs the valve to be fast opening and slow, which is beneficial to the timely opening of anti-surge valve in automatic control state when surge occurs, eliminates the surge phenomenon, and can reduce the action lag of valve and prevent the aggravation of surge.

[0004] This way has the following defects: 1. The device needs to set up auxiliary support to install the flange connection of valve and equipment when installing, and the device needs to be set up by multiple people, and the support also needs to spend extra time, which is time-consuming and laborious; 2. The anti-surge valve will produce accumulated water in the valve body during use, which will accumulate in the valve during long-term use, causing the valve to be blocked by accumulated water, causing the valve to be not smooth, causing the valve to not work normally; 3. When the device deals with the situation beyond the surge limit, the monitoring mechanism may fail after long-term use.

[0005] Therefore, the utility model provides an anti-surge valve for compressor. UTILITY MODEL CONTENTS

[0006] To solve the above technical problems, the utility model discloses an anti-surge valve for compressor, which can be installed and removed by one person, saving time and effort; the drain mechanism is provided to drain the accumulated water accumulated in the valve body in time; the air inlet flow pressure of the upper and lower limit range of surge is controlled respectively, and the structure is simple and reliable.

[0007] In order to achieve the above technical effects, the utility model provides a kind of anti-surge valve for compressor, including valve body, connecting mechanism, connecting mechanism is respectively arranged in the left and right sides of valve body;The valve body further include shell, drain mechanism, pressure regulating mechanism, drain mechanism is arranged in the left side of shell, and pressure regulating mechanism is arranged in the inside of shell;The connecting mechanism further include connecting flange, connector, and connector is arranged in the outside of connecting flange.

[0008] As preferred, the drain mechanism further includes air inlet pipe, drain pipe, float ball, connecting rod, drain pipe is arranged at the bottom of air inlet pipe, float ball is arranged above drain pipe, connecting rod is hingedly connected to the right side of float ball, and the right end of connecting rod is hingedly connected to the inner wall of air inlet pipe.

[0009] As preferred, the left part of air inlet pipe is provided with a V-shaped bend structure.

[0010] As preferred, the pressure regulating mechanism further includes overpressure regulating mechanism and low-pressure regulating mechanism, overpressure regulating mechanism is arranged at the top of air inlet pipe inside shell, and low-pressure regulating mechanism is arranged at the left side of air inlet pipe inside shell.

[0011] As preferred, the overpressure regulating mechanism further includes flow guide pipe a, pressure limiting block a, gas storage cavity, exhaust pipe and exhaust valve, flow guide pipe a is arranged above air inlet pipe, pressure limiting block a is slidingly arranged above flow guide pipe a, gas storage cavity is arranged at the left side of flow guide pipe a and is connected with the cavity where pressure limiting block a is arranged, exhaust pipe is arranged at the right side of flow guide pipe a and is connected with the cavity where pressure limiting block a is arranged, and exhaust valve is arranged on exhaust pipe and above shell.

[0012] As preferred, the low-pressure regulating mechanism further includes flow guide pipe b, pressure limiting block b, sensor, air supplement pipe and electric valve, flow guide pipe b is arranged at the left side of air inlet pipe, pressure limiting block b is slidingly arranged above flow guide pipe b, sensor is arranged above pressure limiting block b, air supplement pipe is connected with air inlet pipe and arranged at the right side of flow guide pipe b, electric valve is arranged on air supplement pipe and above shell, and sensor and electric valve are connected with external controller at the same time.

[0013] As preferred, the connector further includes protective shell, base, torsion spring and fixing clamp, protective shell is arranged on the outside of connecting flange, base is arranged on protective shell between bolt holes of connecting flange, fixing clamp is rotatably arranged above base, and torsion spring is arranged between base and fixing clamp.

[0014] As preferred, fixing clamp is provided with clamping groove below, and the length of clamping groove is greater than the thickness of two connecting flanges connected together.

[0015] Compared with prior art, the utility model has the beneficial effects as follows:

[0016] The device is provided with a connector, which can provide fixed support for installing the valve during installation, and only one person is needed to complete the installation and removal, saving time and effort; the drain mechanism can drain accumulated water inside the valve body in time; the overpressure adjusting mechanism and the low-pressure adjusting mechanism control the intake flow pressure of the upper and lower limit ranges of surge through the two pressure adjusting mechanisms, and the weight of the limit block a and the limit block b is converted into a flow pressure signal, which is simple and reliable in structure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an isometric view of the present application;

[0018] Figure 2 is a front view of the present application;

[0019] Figure 3 is a left view of the present application;

[0020] Figure 4 is a sectional view of a cross section a; Figure 3

[0021] Figure 5 is a partial schematic view of b; Figure 4

[0022] In the drawings, the component list represented by each reference numeral is as follows:

[0023] 1, valve body; 2, housing; 3, drain mechanism; 4, connecting flange; 5, connector; 6, intake pipe; 7, drain pipe; 8, float ball; 9, connecting rod; 10, flow guide pipe a; 11, pressure limiting block a; 12, gas storage cavity; 13, exhaust pipe; 14, exhaust valve; 15, flow guide pipe b; 16, pressure limiting block b; 17, sensor; 18, air supplement pipe; 19, electric valve; 20, protective shell; 21, base; 22, fixing clamp. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Embodiment 1

[0025] As shown in the drawings: Figures 1 to 5

[0026] ​​​In the prior art, the inventor finds that the prior art has the following defects: 1. The device needs to be installed with an auxiliary support to connect the valve and the flange of the equipment during installation. The device needs to be installed with multiple people, and the support also takes additional time and effort; 2. The anti-surge valve will produce water in the valve body during use. The water will accumulate in the valve body for a long time, causing the valve to be blocked by the water, resulting in poor air intake and causing the valve to not work properly; 3. When the device is used for a long time, the monitoring mechanism may fail.

[0027] Therefore, the inventor provides an anti-surge valve for a compressor, which comprises a valve body 1, a connecting mechanism, the connecting mechanism is arranged on the left and right sides of the valve body 1 respectively; the valve body 1 further comprises an outer shell 2, a drainage mechanism 3, and a pressure regulating mechanism, the drainage mechanism 3 is arranged on the left side of the outer shell 2, and the pressure regulating mechanism is arranged in the outer shell 2; the connecting mechanism further comprises a connecting flange 4 and a connector 5, and the connector 5 is arranged on the outer side of the connecting flange 4.

[0028] By using the above scheme, when the valve is installed, the connecting flange 4 of the valve can be fixed on the installation interface through the connector 5, and then the installation is completed by installing the connecting flange 4. When the device is used, the drainage mechanism 3 can automatically drain the accumulated water in the valve body 1 when the water in the valve body 1 accumulates to a certain degree. When the air intake flow of the valve changes, the valve automatically starts to adjust the air intake flow to control the air intake flow within the surge limit. Embodiment 2

[0029] As shown in Figures 1 to 5

[0030] Further, the drainage mechanism 3 further comprises an air inlet pipe 6, a drainage pipe 7, a float ball 8, and a connecting rod 9, the drainage pipe 7 is arranged at the bottom of the air inlet pipe 6, the float ball 8 is arranged above the drainage pipe 7, the connecting rod 9 is hingedly connected to the right side of the float ball 8, and the right end of the connecting rod 9 is hingedly connected to the inner wall of the air inlet pipe 6.

[0031] Further, the left part of the air inlet pipe 6 is provided with a V-shaped bend pipe structure.

[0032] When the device is used for a long time, the water in the valve body 1 accumulates at the bottom end of the air inlet pipe 6, the water lifts the float ball 8 upward, so that the water can be discharged from the drainage pipe 7. As the water level drops, the float ball 8 lowers as the connecting rod 9 is the fulcrum, and the float ball 8 is put back to block the drainage pipe 7 when the water level drops to the bottom, and the drainage is completed. In this way, the device can timely drain the accumulated water in the valve body 1. Embodiment 3

[0033] As shown in Figures 1 to 5 ​​

[0034] Further, the pressure regulating mechanism further comprises an overpressure regulating mechanism and a low pressure regulating mechanism, the overpressure regulating mechanism is arranged at the top of the part of the air inlet pipe 6 inside the shell 2, and the low pressure regulating mechanism is arranged at the left side of the part of the air inlet pipe 6 inside the shell 2;

[0035] Further, the overpressure regulating mechanism further comprises a flow guide pipe a10, a pressure limiting block a11, a gas storage cavity 12, an exhaust pipe 13, and an exhaust valve 14, the flow guide pipe a10 is arranged above the air inlet pipe 6, the pressure limiting block a11 is slidingly arranged above the flow guide pipe a10, the gas storage cavity 12 is arranged at the left side of the flow guide pipe a10 and is connected with the cavity where the pressure limiting block a11 is arranged, the exhaust pipe 13 is arranged at the right side of the flow guide pipe a10 and is connected with the cavity where the pressure limiting block a11 is arranged, and the exhaust valve 14 is arranged on the exhaust pipe 13 and above the shell 2;

[0036] Further, the low pressure regulating mechanism further comprises a flow guide pipe b15, a pressure limiting block b16, a sensor 17, a gas supplement pipe 18, and an electric valve 19, the flow guide pipe b15 is arranged at the left side of the air inlet pipe 6, the pressure limiting block b16 is slidingly arranged above the flow guide pipe b15, the sensor 17 is arranged above the pressure limiting block b16, the gas supplement pipe 18 is connected with the air inlet pipe 6 and is arranged at the right side of the flow guide pipe b15, and the electric valve 19 is arranged on the gas supplement pipe 18 and above the shell 2, and the sensor 17 and the electric valve 19 are connected with an external controller (not shown in the figure) at the same time and are electrically connected with the external controller respectively;

[0037] When the device is normally working, the air pressure in the air inlet pipe 6 transmits the flow pressure signal to the lower side of the pressure limiting block a11 and the pressure limiting block b16 through the flow guide pipe a10 and the flow guide pipe b15, when the air flow in the air inlet pipe 6 is in the normal range, the limiting block a falls on the flow guide pipe a10 above the flow guide pipe a10 to block the flow guide pipe a10, and the pressure limiting block b16 is floated upward by the air pressure transmitted by the flow guide pipe b15 to keep the sensor 17 from being triggered;

[0038] When the air flow pressure in the air inlet pipe 6 is higher than the upper limit pressure of the surge, the air lifts up the pressure limiting block a11, and the air enters the gas storage cavity 12 and the exhaust pipe 13 from the lower side of the pressure limiting block a11, the gas in the gas storage cavity 12 can maintain the pressure balance when the air flow is normal and the pressure limiting block a11 falls down, so as to prevent the pressure limiting block a11 from being affected by the negative pressure in the cavity and from affecting the incorrect identification of the pressure limiting block a11 to the air pressure, the overpressure gas is discharged from the exhaust pipe 13 through the exhaust valve 14, so that the flow pressure in the air inlet pipe 6 can be reduced within the surge limit, and after the air flow in the air inlet pipe 6 is normal, the pressure limiting block a11 falls back to block the flow guide pipe a10, and the air is no longer discharged from the exhaust pipe 13;

[0039] When the air flow pressure in the air inlet pipe 6 is lower than the surge lower limit pressure, the pressure under the pressure limiting block b16 is reduced, the pressure limiting block b16 is lowered downwards along with the reduction of the air flow pressure, and is away from the sensor 17, the sensor 17 detects the away of the pressure limiting block b16, the electric valve 19 is opened in linkage control, the compressed gas tank connected to the rear end of the valve is communicated to the air inlet pipe 6 through the electric valve 19, the compressed gas is supplemented into the air inlet pipe 6 through the electric valve 19, and the distance of the pressure limiting block b16 falling and the opening degree control of the electric valve 19 are detected by the sensor 17 to control the flow of the supplemented gas, so that the air flow pressure in the air inlet pipe 6 is maintained above the surge lower limit, so that the air flow pressure in the surge upper and lower limit ranges is controlled by arranging two pressure regulating mechanisms respectively, and the weight of the limiting block a11 and the limiting block b16 is converted into a flow pressure signal, and the structure is simple and reliable. Embodiment 4

[0040] As Figures 1 to 5 shown:

[0041] Further, the connector 5 further comprises a protective shell 20, a base 21, a torsion spring and a fixing clamp 22, the protective shell 20 is arranged outside the connecting flange 4, the base 21 is arranged on the protective shell 20 between bolt holes of the connecting flange 4, and the fixing clamp 22 is rotationally arranged above the base 21; and the torsion spring (not shown in the figure) is arranged between the base 21 and the fixing clamp 22.

[0042] Further, the fixing clamp 22 is provided with a clamping groove below and the length of the clamping groove is greater than the thickness of the two connecting flanges 4 connected together.

[0043] When the connecting flange 4 is installed, the fixing clamp 22 above the connecting flange 4 is first clamped on the two flanges, then the connecting flanges 4 are butt-jointed, the fixing clamp 22 is automatically clamped under the action of the torsion spring, the device is fixed on the flange to be installed, the protective shell 20 provides a fixing function and also protects the connecting flange 4 from corrosion during use, and when the valve needs to be removed, only the fixing bolt needs to be removed, and the fixing clamp 22 on one side is opened, so that the connector 5 can provide a fixed support for installing the valve during installation, and only one person is needed to complete the installation and removal, which saves time and effort.

[0044] In summary, the device is provided with the connector 5, which can provide a fixed support for installing the valve during installation, and only one person is needed to complete the installation and removal, which saves time and effort; the drainage mechanism 3 is provided, which can drain the accumulated water in the valve body 1 in time; the overpressure regulating mechanism and the low-pressure regulating mechanism are provided, the air flow pressure in the surge upper and lower limit ranges is controlled by arranging two pressure regulating mechanisms respectively, and the weight of the limiting block a and the limiting block b is detected to convert a flow pressure signal, and the structure is simple and reliable.

[0045] The working principle of the utility model is:

[0046] When installing the connecting flange 4, the fixing clamp 22 above the connecting flange 4 is first clamped on the two flanges, and then the connecting flange 4 is butted, and the fixing clamp 22 is automatically clamped by the torsion spring to fix the device on the flange to be installed. The protection shell 20 provides a fixing function and also protects the connecting flange 4 from corrosion during use. When the valve needs to be removed, only the fixing bolt needs to be removed, and the fixing clamp 22 on one side is opened to remove it. In this way, the connector 5 can provide a fixed support for installing the valve during installation. Only one person is needed to complete the installation and removal, saving time and effort.

[0047] After the device is used for a long time, the accumulated water in the valve body 1 gathers at the bottom end of the air inlet pipe 6. The accumulated water lifts the floating ball 8 upward, so that the accumulated water can be discharged from the drain pipe 7. As the water level of the accumulated water decreases, the floating ball 8 descends around the connecting rod 9 and is placed back to block the drain pipe 7 when the water level reaches the bottom. The drainage is completed, and the device can timely discharge the accumulated water in the valve body 1.

[0048] When the device is working normally, the air pressure in the air inlet pipe 6 is transmitted to the lower side of the limiting block a11 and the limiting block b16 through the flow guide pipe a10 and the flow guide pipe b15. When the air flow in the air inlet pipe 6 is within the normal range, the limiting block a falls above the flow guide pipe a10 to block the flow guide pipe a10, and the limiting block b16 is floated upward by the air pressure transmitted by the flow guide pipe b15 to keep the sensor 17 from being triggered.

[0049] When the air flow pressure in the air inlet pipe 6 is higher than the surge upper limit pressure, the air lifts the limiting block a11, and the air enters the gas storage cavity 12 and the exhaust pipe 13 from the lower side of the limiting block a11. The gas in the gas storage cavity 12 can maintain pressure balance when the limiting block a11 falls down when the air flow is normal, preventing the limiting block a11 from being affected by negative pressure in the cavity and affecting the incorrect identification of the limiting block a11 to the air pressure. The overpressure gas is discharged from the exhaust valve 14 through the exhaust pipe 13, so that the flow pressure in the air inlet pipe 6 can be reduced within the surge limit. After the air flow in the air inlet pipe 6 is normal, the limiting block a11 falls back to block the flow guide pipe a10, and the air is no longer discharged from the exhaust pipe 13.

[0050] When the air flow pressure in the air inlet pipe 6 is lower than the surge lower limit pressure, the pressure under the pressure limiting block b16 decreases, the pressure limiting block b16 lowers downwards with the decrease of the air flow pressure, and moves away from the sensor 17, the sensor 17 detects the moving away of the pressure limiting block b16, the electric valve 19 is opened through linkage control, the compressed gas tank connected to the rear end of the valve is communicated to the air inlet pipe 18, the compressed gas is supplemented into the air inlet pipe 6 through the electric valve 19, the distance of the falling of the pressure limiting block b16 is detected through the sensor 17, the opening degree of the electric valve 19 controls the flow of the supplemented gas, the air flow pressure in the air inlet pipe 6 is maintained above the surge lower limit, the air flow pressure in the surge upper and lower limit range is controlled through setting two pressure regulating mechanisms respectively, and the weight of the pressure limiting block a11 and the pressure limiting block b16 is converted into the flow pressure signal, so that the structure is simple and reliable.

[0051] Up to now, the working principle of the device is described.

[0052] It should be noted that, in this document, the relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0053] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An anti-surge valve for a compressor, comprising a valve body (1), a connecting mechanism arranged on the left and right sides of the valve body (1) respectively, characterized in that: The valve body (1) further comprises a shell (2), a hydrophobic mechanism (3), a pressure regulating mechanism, the hydrophobic mechanism (3) is arranged on the left side of the shell (2), and the pressure regulating mechanism is arranged in the shell (2).

2. An anti-surge valve for a compressor as set forth in claim 1, characterized in that: The hydrophobic mechanism (3) further comprises an air inlet pipe (6), a hydrophobic pipe (7), a float ball (8) and a connecting rod (9), the hydrophobic pipe (7) is arranged at the bottom of the air inlet pipe (6), the float ball (8) is arranged above the hydrophobic pipe (7), the connecting rod (9) is hingedly connected to the right side of the float ball (8), and the right end of the connecting rod (9) is hingedly connected to the inner wall of the air inlet pipe (6).

3. An anti-surge valve for a compressor as set forth in claim 2, characterized in that: The left part of the air inlet pipe (6) is provided with a V-shaped elbow structure.

4. An anti-surge valve for a compressor as set forth in claim 1, characterized in that: The pressure regulating mechanism further comprises an overpressure regulating mechanism and a low-pressure regulating mechanism, the overpressure regulating mechanism is arranged at the top of the air inlet pipe (6) in the shell (2), and the low-pressure regulating mechanism is arranged on the left side of the air inlet pipe (6) in the shell (2).

5. An anti-surge valve for a compressor as set forth in claim 4, characterized in that: The overpressure regulating mechanism further comprises a flow guide pipe a (10), a pressure limiting block a (11), a gas storage cavity (12), an exhaust pipe (13) and an exhaust valve (14), the flow guide pipe a (10) is arranged above the air inlet pipe (6), the pressure limiting block a (11) is slidingly arranged above the flow guide pipe a (10), the gas storage cavity (12) is arranged on the left side of the flow guide pipe a (10) and is connected with a cavity in which the pressure limiting block a (11) is arranged, the exhaust pipe (13) is arranged on the right side of the flow guide pipe a (10) and is connected with the cavity in which the pressure limiting block a (11) is arranged, and the exhaust valve (14) is arranged on the exhaust pipe (13) and above the shell (2).

6. An anti-surge valve for a compressor as set forth in claim 4, characterized in that: The low-pressure regulating mechanism further comprises a flow guide pipe b (15), a pressure limiting block b (16), a sensor (17), a gas supplement pipe (18) and an electric valve (19), the flow guide pipe b (15) is arranged on the left side of the air inlet pipe (6), the pressure limiting block b (16) is slidingly arranged above the flow guide pipe b (15), the sensor (17) is arranged above the pressure limiting block b (16), the gas supplement pipe (18) is connected with the air inlet pipe (6) and is arranged on the right side of the flow guide pipe b (15), the electric valve (19) is arranged on the gas supplement pipe (18) and above the shell (2), and the sensor (17) and the electric valve (19) are connected with an external power supply and an electric signal source respectively.

7. An anti-surge valve for a compressor as set forth in claim 1, characterized in that: The connector (5) further comprises a protective shell (20), a base (21), a torsion spring and a fixing clamp (22), the protective shell (20) is arranged on the outside of the connecting flange (4), the base (21) is arranged on the protective shell (20) between bolt holes of the connecting flange (4), the fixing clamp (22) is rotationally arranged above the base (21), and the torsion spring is arranged between the base (21) and the fixing clamp (22).

8. An anti-surge valve for a compressor as set forth in claim 7, characterized in that: The fixing clamp (22) is provided with a clamping groove below, and the length of the clamping groove is greater than the thickness of two connecting flanges (4) connected together.

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