Bubble trap valve

Abstract

The bubble trap valve comprises a drain valve, an exhaust valve, an air cylinder, a drain driving assembly and an exhaust driving assembly, the upper end of the drain valve is connected with the exhaust valve in a sealed mode, the upper end of the exhaust valve is connected with the cylindrical air cylinder in a sealed mode, a drain cavity is formed in the drain valve, a drain outlet is formed in the bottom face of the drain cavity, and a drain pipe is connected to the lower portion of the drain outlet; an exhaust inner cavity is formed in the exhaust valve, an exhaust pipe communicated with the exhaust inner cavity is arranged on the side wall of the exhaust valve, and a sealing ring is arranged in a channel at the joint of the exhaust valve and the drain valve; a piston rod is arranged in the center of the air cylinder, an exhaust gap is formed between the piston rod and the sealing ring, the bottom of the piston rod is connected with a lower valve plug, the lower valve plug blocks the liquid outlet, a liquid discharging driving assembly is arranged on the upper section of the air cylinder, and the liquid discharging driving assembly drives the piston rod and the lower valve plug to upwards open the liquid outlet, so that liquid in the liquid discharging cavity flows out of the liquid discharging pipe; the outer side of the piston rod is slidably connected with a loop valve plug which blocks the upper end of the exhaust gap. And the valve body has the functions of draining and exhausting, and the operation is stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of bubble separation in chromatography systems, and in particular relates to a bubble trap valve. Background Art

[0002] The bubble trap of the chromatography system is a bubble separation technology that uses the difference in lift and buoyancy of bubbles in the liquid phase to separate the mixture into components at different levels. The bubble trap is an important part of it, and it mainly plays the role of filtering and removing bubbles in the liquid. The principle of the bubble trap is that when the gas-liquid mixture flows in the pipeline, bubbles will be generated due to the change in flow rate and the influence of pipeline bending. These bubbles will enter the bubble collector along with the fluid, and the design of the collector allows the bubbles to rise above the liquid surface and stay there under the action of buoyancy, while the liquid continues to flow to the next processing area, realizing the separation of liquid and gas.

[0003] The exhaust port of the bubble trap must be connected to both the air and the waste pipe. There are currently two connection methods. One method is to separate two pipes from the exhaust port of the bubble trap, one leading to the air and the other leading to the waste pipe. The other method is to have a separate pipe after the exhaust port. The interface will lead to a funnel connected to the waste, and the funnel will be used to exhaust and drain liquid. For both methods, safety valves and diaphragm valves are required to achieve the functions of exhaust and waste. The system is relatively complex, the number of valves used is relatively large, and the cost is relatively high, especially the second funnel method. When the waste flow of the bubble trap is large, it may cause liquid overflow. Utility Model Content

[0004] In view of the above problems and technical requirements, the utility model provides a bubble trap valve, and the valve body is installed at the exhaust outlet of the bubble trap, which can solve the problem of liquid overflow caused by the bubble trap when discharging waste and improve the reliability of the system.

[0005] The technical scheme of the utility model is as follows: a bubble trap valve, comprising a drain valve, an exhaust valve, a cylinder, a drain drive assembly and an exhaust drive assembly, wherein the upper end of the drain valve is sealed and connected to the exhaust valve, and the upper end of the exhaust valve is sealed and connected to the cylindrical cylinder, a drain cavity is provided in the drain valve, a drain port is provided on the bottom surface of the drain cavity, and a drain pipe is connected below the drain port; an exhaust inner cavity is provided in the exhaust valve, an exhaust pipe connected to the exhaust inner cavity is provided on the side wall of the exhaust valve, and a sealing ring is provided in the channel at the junction of the exhaust valve and the drain valve; a piston rod is provided in the center of the cylinder, the piston rod passes through the inner hole of the sealing ring, and the piston A circle of exhaust gap is provided between the rod and the sealing ring, and a lower valve plug is connected to the bottom of the piston rod, which blocks the drain port. The drain drive assembly is arranged in the upper section of the cylinder, and the drain drive assembly drives the piston rod and the lower valve plug to move upward to open the drain port, so that the liquid in the drain chamber flows out from the drain pipe; the outer side of the piston rod is slidably connected to the sleeve valve plug, which blocks the upper end of the exhaust gap. The exhaust drive assembly arranged in the lower section of the cylinder drives the sleeve valve plug to move upward to open the exhaust gap, and the gas in the drain chamber flows upward into the exhaust inner cavity through the exhaust gap and is discharged outward from the exhaust pipe.

[0006] Furthermore, the discharge drive assembly includes a large spring, an upper piston and a first gas injection port. The first gas injection port is arranged on the side wall of the cylinder above the exhaust drive assembly. The upper piston is slidably connected to the inner wall of the cylinder above the first gas injection port. A blind hole with a port facing downward is provided in the upper piston. The upper end of the large spring is connected to the top surface of the cylinder, and the lower end is connected to the upper surface of the upper piston. The piston rod extends downward through the upper piston and the blind hole. The piston rod and the upper piston are locked and connected. Compressed gas is injected into the cylinder through the first gas injection port. The compressed gas lifts the upper piston upward, and the upper piston drives the piston rod to move upward. The large spring is compressed, and the lower valve plug at the bottom end of the piston rod opens the discharge port.

[0007] Furthermore, the exhaust drive assembly includes a lower piston, a small spring and a second gas injection port. The lower piston is slidably connected to the inner wall of the cylinder. The small spring is arranged in a blind hole. The upper end of the small spring is connected to the top surface of the blind hole, and the lower end is connected to the upper surface of the lower piston. The second gas injection port is arranged on the side wall of the cylinder between the exhaust valve and the lower piston; the piston rod passes through the lower piston, and the top of the annular valve plug is locked and connected to the lower piston. Gas is injected into the cylinder through the second gas injection port, and the compressed gas pushes the lower piston upward. The lower piston drives the annular valve plug to slide upward along the piston rod, the small spring is compressed, and the annular valve plug opens the exhaust gap to allow the exhaust gas to escape upward.

[0008] Furthermore, a clamp is provided on the outer side of the exhaust valve and the drain valve, and the clamp locks the exhaust valve and the drain valve from the outer periphery. The sealing ring is clamped between the drain chamber and the exhaust chamber to isolate the two chambers. The piston rod penetrates the exhaust chamber and the inner hole of the sealing ring downward, and extends the lower valve plug into the drain chamber. The lower valve plug only moves up and down in the drain chamber.

[0009] Furthermore, the upper end of the valve body of the exhaust valve is flat, the lower port sealing sleeve of the cylinder is connected to the outer side surface of the exhaust valve, the upper end surface of the exhaust valve is provided with a positioning groove, the lower end surface of the lower piston is fixedly connected with a positioning pin, the bottom of the positioning pin is inserted into the positioning groove, and the positioning pin opens a certain gap between the exhaust valve and the lower piston, so that the second gas injection port can inject gas into the gap, and the movement stroke of the lower piston does not exceed the depth of the positioning groove.

[0010] Furthermore, a cap is detachably connected to the center of the top surface of the cylinder, and the top of the piston rod extends into the inner cavity of the cap.

[0011] Furthermore, the elastic coefficient of the large spring is greater than that of the small spring, and in an initial state without the injection of compressed gas, both the large spring and the small spring are in a compressed state.

[0012] Furthermore, a liquid feed pipe is connected to the side wall of the liquid discharge valve, and the liquid feed pipe introduces the liquid feed containing bubbles into the liquid discharge cavity. The liquid feed containing bubbles generated by the chromatography system is input into the liquid discharge cavity through the liquid feed pipe, and the gas phase and liquid phase are separated in the liquid discharge cavity and discharged from the valve body respectively.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the bubble trap valve of the utility model is composed of a discharge valve and an exhaust valve, and two gas injection ports are arranged on the cylinder, the first gas injection port controls the movement of the discharge drive assembly, and the discharge drive assembly controls the lower valve plug to open the discharge pipe so that the liquid can be discharged downward; the second gas injection port controls the exhaust drive assembly, and the exhaust drive assembly controls the annular sleeve valve plug to open the exhaust gap so that the gas can be discharged upward from the exhaust inner cavity, and the first gas injection port and the second gas injection port are independent of each other, which can ensure the independence of the discharge and exhaust operations, and realize that one valve can control both the discharge and exhaust of the bubble trap, and the exhaust valve can also play the role of a safety valve. The operation of the chromatography system installed with this structure is safer, which not only reduces the complexity of the system, but also reduces the structural cost of the system and improves the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the appearance of the bubble trap valve of the utility model;

[0015] Figure 2 It is a front cross-sectional view of the bubble trap valve of the utility model;

[0016] Figure 3 It is a cross-sectional view of the utility model when the drain valve is opened;

[0017] Figure 4 It is a cross-sectional view of the exhaust valve of the utility model when it is opened;

[0018] Marked in the figure are: drain valve 1, drain chamber 11, drain port 12, drain pipe 13, liquid input pipe 14, sealing ring 2, exhaust gap 21, exhaust valve 3, exhaust inner chamber 31, exhaust pipe 32, positioning groove 33, clamp 4, cylinder 5, cap 51, piston rod 6, lower valve plug 61, ring valve plug 62, drain drive assembly 7, large spring 71, upper piston 72, blind hole 721, first gas injection port 73, exhaust drive assembly 8, lower piston 81, positioning pin 811, small spring 82, second gas injection port 83. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1-4 The utility model bubble trap valve is shown, comprising a drain valve 1, an exhaust valve 3, a cylinder 5, a drain drive assembly 7 and an exhaust drive assembly 8. The upper end of the drain valve 1 is sealed and connected to the exhaust valve 3, and the upper end of the exhaust valve 3 is sealed and connected to the cylindrical cylinder 5. A drain chamber 11 is provided in the drain valve 1, and a drain port 12 is provided on the bottom surface of the drain chamber 11. A drain pipe 13 is connected below the drain port 12. A piston rod 6 is provided at the center of the cylinder 5, and a lower valve plug 61 is connected to the bottom of the piston rod 6. The lower valve plug 61 blocks the drain port 12. The drain drive assembly 7 is arranged in the upper section of the cylinder. The drain drive assembly 7 drives the piston rod 6 and the lower valve plug 61 to move upward to open the drain port 12, so that the liquid in the drain chamber 11 flows out from the drain pipe 13.

[0021] The discharge drive assembly 7 includes a large spring 71, an upper piston 72 and a first gas injection port 73. The first gas injection port 73 is arranged on the side wall of the cylinder above the exhaust drive assembly 8. The upper piston 72 is slidably connected to the inner wall of the cylinder above the first gas injection port 73. A blind hole 721 with a port facing downward is provided in the upper piston 72. The upper end of the large spring 71 is connected to the top surface of the cylinder, and the lower end is connected to the upper surface of the upper piston 72. The piston rod 6 extends downward through the upper piston 72 and the blind hole 721. The piston rod 6 and the upper piston 72 are locked and connected. Compressed gas is injected into the cylinder 5 through the first gas injection port 73. The compressed gas pushes the upper piston 72 upward, and the upper piston 72 drives the piston rod 6 to move upward. The large spring 71 is compressed, and the lower valve plug 61 at the bottom end of the piston rod 6 opens the discharge port 13.

[0022] The center of the cylinder top surface is detachably connected with a cap 51, and the top of the piston rod 6 extends into the inner cavity of the cap 51. A feed liquid input pipe 14 is connected to the side wall of the drain valve 1. The feed liquid with bubbles generated by the chromatography system passes through the bubble trap, and gas-liquid separation is achieved in the bubble trap. When the feed liquid is input into the drain cavity 11 through the input pipe 14, the drain valve is opened, and the feed liquid enters the system circulation through the drain valve; when the bubble trap needs to exhaust gas, the drain valve is closed, and the exhaust valve is opened at the same time, and the gas in the bubble trap is discharged into the air.

[0023] The exhaust valve 3 is provided with an exhaust cavity 31, and the exhaust pipe 32 connected to the exhaust cavity 31 is provided on the side wall of the exhaust valve 3. A sealing ring 2 is provided in the passage at the junction of the exhaust valve 3 and the drain valve 1. A piston rod 6 is provided at the center of the cylinder 5, and the piston rod 6 passes through the inner hole of the sealing ring 2. A circle of exhaust gap 21 is provided between the piston rod 6 and the sealing ring 2. The outer side of the piston rod 6 is slidably connected to the ring sleeve valve plug 62, and the ring sleeve valve plug 62 is blocked at the upper end of the exhaust gap 21. The exhaust drive assembly 8 provided at the lower section of the cylinder 5 drives the ring sleeve valve plug 62 to move upward, opening the exhaust gap 21, and the gas in the drain cavity 11 flows upward into the exhaust cavity 31 through the exhaust gap 21, and is discharged from the exhaust pipe 32.

[0024] A clamp 4 is provided on the outside of the exhaust valve 3 and the drain valve 1, and the clamp 4 locks the exhaust valve 3 and the drain valve 1 from the outer periphery. The sealing ring 2 is clamped between the drain chamber 11 and the exhaust inner chamber 31 to isolate the two chambers. The piston rod 6 penetrates downward through the exhaust inner chamber 31 and the inner hole of the sealing ring, and extends the lower valve plug 61 into the drain chamber 11. The lower valve plug 61 only moves up and down in the drain chamber 11.

[0025] The exhaust drive assembly 8 includes a lower piston 81, a small spring 82 and a second gas injection port 83. The lower piston 81 is slidably connected to the inner wall of the cylinder. The small spring 82 is arranged in the blind hole 721. The upper end of the small spring 82 is connected to the top surface of the blind hole, and the lower end is connected to the upper surface of the lower piston 81. The second gas injection port 83 is arranged on the side wall of the cylinder between the exhaust valve 3 and the lower piston 81; the piston rod 6 passes through the lower piston 81, and the top of the annular valve plug 62 is locked and connected to the lower piston 81. Gas is injected into the cylinder through the second gas injection port 83, and the compressed gas pushes the lower piston 81 upward. The lower piston 81 drives the annular valve plug 62 to slide upward along the piston rod 6, the small spring 82 is compressed, and the annular valve plug 62 opens the exhaust gap 21 to allow the exhaust gas to escape upward. The upper end of the valve body of the exhaust valve 3 is flat, and the lower port of the cylinder 5 is sealingly sleeved on the outer side of the exhaust valve 3. The upper end surface of the exhaust valve 3 is provided with a positioning groove 33. The lower end surface of the lower piston 81 is fixedly connected with a positioning pin 811, and the bottom of the positioning pin 811 is inserted into the positioning groove 33. The positioning pin 811 opens a certain gap between the exhaust valve 3 and the lower piston 81, so that the second gas injection port 83 can inject gas into the gap. The movement stroke of the lower piston 81 does not exceed the depth of the positioning groove 33.

[0026] The elastic coefficient of the large spring 71 is greater than that of the small spring 82. In the initial state without compressed gas injection, the large spring 71 and the small spring 82 are both in a compressed state. In the initial state, the large spring 71 presses the upper piston 72 downward to press the lower valve plug 61, and the small spring 82 presses the lower piston 81 downward to press the annular valve plug 62, and the discharge port 12 and the exhaust gap 21 are both in a normally closed state.

[0027] The action process of the bubble trap valve discharging liquid: the liquid input pipe 14 inputs the liquid into the liquid discharging chamber 11, and the compressed gas is injected into the liquid discharging chamber 11 through the first gas injection port 73. The compressed gas pushes the upper piston 72 upward, the large spring 71 is compressed, the upper piston 72 pulls the piston rod 6 upward, the lower valve plug 61 opens the liquid discharging port 12, and the liquid flows downward from the liquid discharging pipe 13. In this process, the small spring 82 changes from a compressed state to a stretched state, but because the spring coefficient of the small spring 82 is small, and the upper surface of the lower piston 81 is also subjected to downward air pressure while the first gas injection port 73 injects gas inward, the lower piston 81 will not be pulled up by the small spring 82, the lower piston 81 and the annular valve plug 62 remain stationary, and the exhaust gap 21 is still closed. After the first gas injection port 73 stops injecting gas, the large spring 71 is reset, and the lower valve plug 61 blocks the liquid discharging port 12 downward to stop discharging liquid.

[0028] The action process of the bubble trap valve exhaust is as follows: air is injected inwardly through the second air injection port 83, and the compressed gas pushes the lower piston 81 upward, and the lower piston 81 drives the annular valve plug 62 upward, the small spring 82 is compressed, and the annular valve plug 62 opens the exhaust gap 21, and the gas in the discharge chamber 11 enters the exhaust inner cavity 31 from the exhaust gap 21, and is then discharged into the atmosphere from the exhaust pipe 32; since the elastic coefficient of the small spring 82 is small, when too much gas accumulates in the discharge chamber 11, the air pressure pushes the annular valve plug 62 upward, and the gas is automatically discharged upward, relieving the pressure in the discharge chamber 11, so the exhaust valve 3 also has the function of a safety valve.

[0029] The above are only several preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bubble trap valve, characterized in that: The utility model comprises a liquid discharge valve, an exhaust valve, a cylinder, a liquid discharge drive assembly and an exhaust drive assembly, wherein the upper end of the liquid discharge valve is sealedly connected to the exhaust valve, the upper end of the exhaust valve is sealedly connected to the cylindrical cylinder, a liquid discharge cavity is arranged in the liquid discharge valve, a liquid discharge port is arranged on the bottom surface of the liquid discharge cavity, and a liquid discharge pipe is connected below the liquid discharge port; an exhaust inner cavity is arranged in the exhaust valve, an exhaust pipe connected to the exhaust inner cavity is arranged on the side wall of the exhaust valve, and a sealing ring is arranged in the channel at the junction of the exhaust valve and the liquid discharge valve; a piston rod is arranged in the center of the cylinder, the piston rod passes through the inner hole of the sealing ring, and a ring is arranged between the piston rod and the sealing ring The exhaust gap is connected to the bottom of the piston rod with a lower valve plug, which blocks the drain port. The drain drive assembly is arranged in the upper section of the cylinder. The drain drive assembly drives the piston rod and the lower valve plug to move upward to open the drain port, so that the liquid in the drain chamber flows out from the drain pipe; the outer side of the piston rod is slidably connected to the sleeve valve plug, which blocks the upper end of the exhaust gap. The exhaust drive assembly arranged in the lower section of the cylinder drives the sleeve valve plug to move upward to open the exhaust gap. The gas in the drain chamber flows upward into the exhaust inner cavity through the exhaust gap and is discharged outward from the exhaust pipe.

2. A bubble trap valve according to claim 1, characterized in that: The liquid discharge drive assembly includes a large spring, an upper piston and a first gas injection port. The first gas injection port is arranged on the side wall of the cylinder above the exhaust drive assembly. The upper piston is slidably connected to the inner wall of the cylinder above the first gas injection port. A blind hole with a port facing downward is provided in the upper piston. The upper end of the large spring is connected to the top surface of the cylinder, and the lower end is connected to the upper surface of the upper piston. The piston rod extends downward through the upper piston and the blind hole. The piston rod and the upper piston are locked and connected. Compressed gas is injected into the cylinder through the first gas injection port. The compressed gas lifts the upper piston upward, and the upper piston drives the piston rod to move upward. The large spring is compressed, and the lower valve plug at the bottom end of the piston rod opens the liquid discharge port.

3. A bubble trap valve according to claim 2, characterized in that: The exhaust drive assembly includes a lower piston, a small spring and a second gas injection port. The lower piston is slidably connected to the inner wall of the cylinder. The small spring is arranged in the blind hole. The upper end of the small spring is connected to the top surface of the blind hole, and the lower end is connected to the upper surface of the lower piston. The second gas injection port is arranged on the side wall of the cylinder between the exhaust valve and the lower piston. The piston rod passes through the lower piston, and the top of the ring sleeve valve plug is locked and connected to the lower piston. Gas is injected into the cylinder through the second gas injection port, and the compressed gas pushes the lower piston upward. The lower piston drives the ring sleeve valve plug to slide upward along the piston rod, the small spring is compressed, and the ring sleeve valve plug opens the exhaust gap to allow the exhaust gas to escape upward.

4. A bubble trap valve according to claim 3, characterized in that: A clamp is provided on the outside of the exhaust valve and the drain valve, and the clamp locks the exhaust valve and the drain valve from the outer periphery. The sealing ring is clamped between the drain cavity and the exhaust cavity to isolate the two cavities. The piston rod penetrates the exhaust cavity and the inner hole of the sealing ring downward, and the lower valve plug is extended into the drain cavity. The lower valve plug only moves up and down in the drain cavity.

5. A bubble trap valve according to claim 4, characterized in that: The upper end of the valve body of the exhaust valve is flat, and the sealing sleeve of the lower port of the cylinder is connected to the outer side surface of the exhaust valve. The upper end surface of the exhaust valve is provided with a positioning groove, and the lower end surface of the lower piston is fixedly connected with a positioning pin, and the bottom of the positioning pin is inserted into the positioning groove. The positioning pin opens a certain gap between the exhaust valve and the lower piston, so that the second gas injection port can inject gas into the gap, and the movement stroke of the lower piston does not exceed the depth of the positioning groove.

6. A bubble trap valve according to claim 5, characterized in that: A cap is detachably connected to the center of the top surface of the cylinder, and the top of the piston rod extends into the inner cavity of the cap.

7. A bubble trap valve according to claim 6, characterized in that: The elastic coefficient of the large spring is greater than that of the small spring. In an initial state without the injection of compressed gas, both the large spring and the small spring are in a compressed state.

8. The bubble trap valve according to claim 1, characterized in that: A liquid feed pipe is connected to the side wall of the liquid discharge valve, and the liquid feed pipe introduces the liquid containing bubbles into the liquid discharge cavity.

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