Two-valve-group valve terminal for isotope mass spectrometer

Abstract

The invention discloses a two-valve-group valve terminal for an isotope mass spectrometer, and relates to the technical field of valve terminals, the two-valve-group valve terminal for the isotope mass spectrometer comprises a valve body, a feeding pipeline is arranged in the valve body, a feeding connector is installed on the feeding pipeline, a discharging pipeline is arranged in the valve body, and a discharging connector is installed on the discharging pipeline. When the equipment is used, the feeding connector is connected with a pipeline for supplying a sample to be detected, the two discharging connectors are connected with a feeding port of a mass spectrometer, the sample to be detected enters from the feeding connector, the discharging connectors are connected with a discharging port of the mass spectrometer, and the discharging connectors are connected with a discharging port of the mass spectrometer. When the valve core assembly works, samples to be tested flowing to the mass spectrometer can be reduced or supply to the mass spectrometer can be stopped, and flow control of the samples to be tested supplied to the mass spectrometer and opening and closing of a supply pipeline can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of valve islands, in particular to a two-valve group valve island for an isotope mass spectrometer. Background Art

[0002] An isotope mass spectrometer is an analytical instrument used to measure the relative abundance of different isotopes in a substance. It is widely used in geology, environmental science, biology and other fields. Through the precise determination of isotopes, the instrument can provide important information about the source of substances, changes in ecosystems and paleoclimate conditions. The working process of an isotope mass spectrometer mainly includes four steps: sample preparation, ionization, mass analysis and data processing. Before performing isotope analysis, the sample must first be prepared into a state suitable for analysis and then transported to the mass spectrometer for detection.

[0003] Under the existing technology, it is only possible to transport the sample to be tested into the mass spectrometer, but it is impossible to close and open the delivery pipeline and control the flow rate of the control box in real time, which can easily affect the test results and cause residual waste of the measured material. Summary of the invention

[0004] The object of the present invention is to provide a two-valve group valve island for an isotope mass spectrometer to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: the two-valve group valve island for isotope mass spectrometer includes a valve body, a feed pipeline is opened inside the valve body, a feed joint is installed on the feed pipeline, two discharge pipelines are opened inside the valve body, and discharge joints are installed on the two discharge pipelines, the feed pipeline is connected with the two discharge pipelines through a control chamber, and valve core assemblies are arranged on the two control chambers.

[0006] When using the two-valve group valve island for isotope mass spectrometer, the feed connector 2 is connected to the pipeline for supplying the sample to be tested, and the two discharge connectors are connected to the feed port of the mass spectrometer. In the initial state, the sample to be tested enters from the feed connector, flows through the feed pipeline and the control chamber through the discharge pipeline, and finally flows out of the valve island from the discharge connector. When one valve core component is working, the sample to be tested flowing to the mass spectrometer will be reduced. When both valve core components are working, the supply to the mass spectrometer will be stopped, so that the flow control of the sample to be tested supplied to the mass spectrometer and the opening and closing of the supply pipeline can be realized.

[0007] As a preferred technical solution, the valve core assembly includes a mounting hole, a mounting seat, a valve core, a push rod, a buffer spring, a sealing plug, a movable ring, an inflatable joint, a closed air chamber, a mounting groove, a sealing ring, a diaphragm, a buffer pad, a limit clamp, a collar, an upper cover body and an arc-shaped protrusion; Two mounting holes are symmetrically provided on the valve body, and the two mounting holes are located at the same position as the control chamber. A mounting seat is installed above the two mounting holes, and a valve core is slidably installed in the mounting seat. A sealing plug is installed at one end of the valve core close to the control chamber, and a movable ring is slidably installed in the mounting seat. An upper cover body is installed above the mounting seat, and an inflation joint is installed on the upper cover body. A closed air chamber is provided on the upper cover body, and the valve core part extends into the closed air chamber.

[0008] When the valve core assembly is working, gas is filled into the closed air chamber through the inflation joint. The air pressure in the closed air chamber increases, pushing the movable ring to drive the valve core to move toward the side close to the control room. The valve core drives the sealing plug to move synchronously while moving. The sealing plug gradually approaches the control room, and the amount of the test sample discharged from the discharge pipeline gradually decreases. When the sealing plug completely blocks the discharge pipeline, the corresponding discharge joint will stop feeding. By controlling the inflation amount of the inflation joint, the distance the sealing plug moves downward can be controlled, thereby controlling the flow rate of the test sample and the opening and closing of the corresponding discharge pipeline.

[0009] As a preferred technical solution, the valve core outer sleeve is provided with a buffer spring, and the buffer spring is located in the gap between the mounting seat and the movable ring.

[0010] When the valve core assembly is working, the valve core will compress the buffer spring when it moves downward. When the inflation joint stops inflating, the buffer spring will stretch due to its elastic potential energy, pushing the valve core to drive the sealing plug to return to its original state, so that the valve opens and continues to feed. The existence of the buffer spring can ensure that the valve can respond and open in time when inflation stops, ensuring the valve's response speed and normal use.

[0011] As a preferred technical solution, a limit clamp is installed on the valve core, and the limit clamp is located outside the buffer spring and close to the upper cover body.

[0012] The limit clamp limits the buffer spring between the mounting seat and the upper end of the valve core, ensuring the thrust of the buffer spring on the valve core when it resets, thereby ensuring the normal use of the valve.

[0013] As a preferred technical solution, a mounting groove is provided on the outer side of the movable ring, a sealing ring is installed in the mounting groove, a sleeve ring can be installed on the mounting groove, and the sleeve ring is located on the outer side of the sealing ring.

[0014] When the valve is closed, the inflation joint fills gas into the closed air chamber and pushes the movable ring downward. The gas will fill the gap between the movable ring and the upper cover. The sealing ring can effectively prevent the gas from escaping to the outside, ensuring the accuracy of flow control and saving energy.

[0015] As a preferred technical solution, a diaphragm is installed between the mounting seat and the mounting hole, a buffer pad is installed on the push rod, and the center position of the diaphragm is clamped between the buffer pad and the valve core.

[0016] As a preferred technical solution, a circle of arc-shaped protrusions is provided on the diaphragm, and the protrusions of the arc-shaped protrusions face the direction of the control chamber.

[0017] The valve core is installed for sliding, so it is difficult to avoid a gap at the contact point with the mounting seat, which may easily cause leakage of the sample to be tested or contamination of the sample to be tested, affecting the test results. A diaphragm is clamped between the control chamber and the valve core. When the valve core moves toward the control chamber, the diaphragm will be stretched. The existence of the arc-shaped protrusion provides a margin for stretching, reduces the deviation of the diaphragm, ensures the sealing of the valve, effectively prevents leakage of the sample to be tested and contamination of the sample to be tested by the control gas, and avoids the valve affecting the detection accuracy of the mass spectrometer.

[0018] As a preferred technical solution, a ventilation hole is provided on the mounting seat, and the ventilation hole connects the outside world with the inside of the movable ring.

[0019] When the movable ring moves toward the control room, the gap between the movable ring and the mounting seat will be compressed, and the pressure will increase, which may cause the mounting seat to expand and cause gas leakage. When the movable ring moves away from the control room, the gap increases and the air pressure decreases, which may cause the movable ring and the valve core to fail to reset normally, affecting the normal use of the valve. The existence of the air vent ensures that the pressure in the gap is always the same as that of the external gas, which will not cause the mounting seat to expand and the pressure to decrease, affecting the resetting of the valve core, thereby ensuring the normal use of the valve.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The control room connects the feed pipeline and the discharge pipeline, and controls the flow of the sample to be tested to the discharge pipeline in the control room, thereby realizing flow control of the sample to be tested supplied to the mass spectrometer and opening and closing the supply pipeline.

[0021] 2. Inflate the valve core assembly through the inflation joint to control the opening and closing of the valve, and control the flow rate by controlling the degree of valve opening through the inflation volume, so as to further realize the flow control and opening and closing of the supply pipeline of the sample to be tested supplied to the mass spectrometer.

[0022] 3. By setting a buffer spring, it is ensured that the valve can respond and open in time when inflation stops, ensuring the valve's response speed and normal use.

[0023] 4. By clamping the diaphragm between the control chamber and the valve core, the arc-shaped protrusion on the diaphragm reduces the deviation of the diaphragm, ensures the sealing of the valve, effectively prevents the leakage of the sample to be tested and the contamination of the control gas to the sample to be tested, and avoids the valve affecting the detection accuracy of the mass spectrometer.

[0024] 5. By opening the air vent, the gap pressure between the mounting seat and the movable ring is always the same as the external gas, which will not cause the mounting seat to expand and the pressure to decrease, affecting the resetting of the valve core, thereby ensuring the normal use of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention; Figure 3 It is a schematic diagram of the explosion structure of the present invention; Figure 4 It is a schematic diagram of a first cutaway structure of the present invention; Figure 5 It is a second cross-sectional structural schematic diagram of the present invention; Figure 6 For the present invention Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0026] In the figure: 1. Valve body; 2. Feed connector; 3. Feed pipeline; 4. Control room; 5. Discharge pipeline; 6. Discharge connector; 8. Ventilation hole; 7. Valve core assembly; 701. Mounting hole; 702. Mounting seat; 703. Valve core; 704. Push rod; 705. Buffer spring; 706. Sealing plug; 707. Movable ring; 708. Inflatable joint; 709. Sealed air chamber; 710. Mounting groove; 711. Sealing ring; 712. Diaphragm; 713. Buffer pad; 714. Limit clamp; 715. Ring; 716. Upper cover; 717. Arc-shaped protrusion. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example: Figure 1-Figure 5 As shown, the present invention provides a two-valve group valve island technical solution for an isotope mass spectrometer, which is characterized in that: the two-valve group valve island for the isotope mass spectrometer includes a valve body 1, a feed pipeline 3 is opened inside the valve body 1, a feed connector 2 is installed on the feed pipeline 3, two discharge pipelines 5 are opened inside the valve body 1, and the two discharge pipelines 5 are installed with discharge connectors 6, the feed pipeline 3 is connected with the two discharge pipelines 5 through a control chamber 4, and the two control chambers 4 are provided with valve core assemblies 7.

[0029] When using the two-valve group valve island for isotope mass spectrometer, the feed connector 2 is connected to the pipeline for supplying the sample to be tested, and the two discharge connectors 6 are connected to the feed port of the mass spectrometer. In the initial state, the sample to be tested enters from the feed connector 2, flows through the feed pipeline 3 and the control chamber 4, flows through the discharge pipeline 5, and finally flows out of the valve island from the discharge connector 6. When one valve core component 7 is working, the sample to be tested flowing to the mass spectrometer will be reduced. When both valve core components 7 are working, the supply to the mass spectrometer is stopped, so that the flow control of the sample to be tested supplied to the mass spectrometer and the opening and closing of the supply pipeline can be realized.

[0030] like Figure 3-Figure 6 As shown, the valve core assembly 7 includes a mounting hole 701, a mounting seat 702, a valve core 703, a push rod 704, a buffer spring 705, a sealing plug 706, a movable ring 707, an inflatable joint 708, a closed air chamber 709, a mounting groove 710, a sealing ring 711, a diaphragm 712, a buffer pad 713, a limit clamp 714, a collar 715, an upper cover 716 and an arc-shaped protrusion 717; Two mounting holes 701 are symmetrically provided on the valve body 1, and the two mounting holes 701 are located at the same position as the control chamber 4. A mounting seat 702 is installed above the two mounting holes 701, and a valve core 703 is slidably installed in the mounting seat 702. A sealing plug 706 is installed at one end of the valve core 703 close to the control chamber 4, and a movable ring 707 is slidably installed in the mounting seat 702. An upper cover body 716 is installed above the mounting seat 702, and an inflation joint 708 is installed on the upper cover body 716. A closed air chamber 709 is provided on the upper cover body 716, and a part of the valve core 703 extends into the closed air chamber 709.

[0031] When the valve core assembly 7 is working, gas is filled into the closed air chamber 709 through the inflation joint 708. The air pressure in the closed air chamber 709 increases, pushing the movable ring 707 to drive the valve core 703 to move toward the side close to the control chamber 4. The valve core 703 drives the sealing plug 706 to move synchronously when moving. The sealing plug 706 gradually approaches the control chamber 4, and the sample to be tested discharged from the discharge pipeline 5 gradually decreases. When the sealing plug 706 completely blocks the discharge pipeline 5, the corresponding discharge joint 6 will stop feeding. By controlling the inflation amount of the inflation joint 708, the downward moving distance of the sealing plug 706 can be controlled, thereby controlling the flow rate of the sample to be tested and the opening and closing of the corresponding discharge pipeline 5.

[0032] The valve core 703 is provided with a buffer spring 705 on its outer sleeve, and the buffer spring 705 is located in the gap between the mounting seat 702 and the movable ring 707 .

[0033] When the valve core assembly 7 is working, the valve core 703 will compress the buffer spring 705 when it moves downward. When the inflation joint 708 stops inflating, the buffer spring 705 will stretch due to its elastic potential energy, pushing the valve core 703 to drive the sealing plug 706 to return to its original state, so that the valve is opened and the material feeding continues. The existence of the buffer spring 705 can ensure that the valve can respond and open in time when inflation stops, thereby ensuring the response speed and normal use of the valve.

[0034] The valve core 703 is provided with a limit clamp 714 , and the limit clamp 714 is located outside the buffer spring 705 and close to a side of the upper cover 716 .

[0035] The limiting clamp 714 limits the buffer spring 705 between the mounting seat 702 and the upper end of the valve core 703, ensuring the thrust of the buffer spring 705 on the valve core 703 when it resets, thereby ensuring the normal use of the valve.

[0036] An installation groove 710 is formed on the outer side of the movable ring 707 . A sealing ring 711 is installed in the installation groove 710 . A sleeve ring 715 can be installed on the installation groove 710 . The sleeve ring 715 is located on the outer side of the sealing ring 711 .

[0037] When the valve is closed, the inflation connector 708 fills gas into the closed air chamber 709, pushing the movable ring 707 downward, and the gas will fill the gap between the movable ring 707 and the upper cover body 716. The sealing ring 711 can effectively prevent the gas from escaping to the outside, ensuring the accuracy of flow control and saving energy.

[0038] A diaphragm 712 is installed between the mounting seat 702 and the mounting hole 701 , a buffer pad 713 is installed on the push rod 704 , and the center of the diaphragm 712 is sandwiched between the buffer pad 713 and the valve core 703 .

[0039] The diaphragm 712 is provided with a circle of arc-shaped protrusions 717 , and the protrusions of the arc-shaped protrusions 717 face the control chamber 4 .

[0040] The valve core 703 is installed for sliding, so it is difficult to avoid a gap at the contact point with the mounting seat 702, which may easily cause leakage of the sample to be tested or contamination of the sample to be tested, affecting the test results. A diaphragm 712 is clamped between the control chamber 4 and the valve core 703. When the valve core 703 moves toward the side close to the control chamber 4, the diaphragm 712 will be stretched. The existence of the arc-shaped protrusion 717 provides a margin for stretching, reduces the deviation of the diaphragm 712, ensures the sealing of the valve, effectively prevents leakage of the sample to be tested and contamination of the sample to be tested by the control gas, and avoids the valve affecting the detection accuracy of the mass spectrometer.

[0041] The mounting seat 702 is provided with a vent hole 8 , and the vent hole 8 is connected with the outside and the inside of the movable ring 707 .

[0042] When the movable ring 707 moves toward the control chamber 4, the gap between the movable ring 707 and the mounting seat 702 will be compressed, and the pressure will increase, which may cause the mounting seat 702 to expand and cause gas leakage. When the movable ring 707 moves away from the control chamber 4, the gap increases and the air pressure decreases, which may cause the movable ring 707 and the valve core 703 to fail to reset normally, affecting the normal use of the valve. The existence of the air vent 8 ensures that the pressure in the gap is always the same as the external gas, and the mounting seat 702 will not expand and the pressure will not decrease, affecting the reset of the valve core 703, thereby ensuring the normal use of the valve.

[0043] Working principle of the present invention: When using the two-valve group valve island for isotope mass spectrometer, the feed connector 2 is connected to the pipeline for supplying the sample to be tested, and the two discharge connectors 6 are connected to the feed port of the mass spectrometer. In the initial state, the sample to be tested enters from the feed connector 2, flows through the feed pipeline 3 and the control chamber 4, flows through the discharge pipeline 5, and finally flows out of the valve island from the discharge connector 6. When one valve core component 7 is working, the sample to be tested flowing to the mass spectrometer will be reduced. When both valve core components 7 are working, the supply to the mass spectrometer is stopped, so that the flow control of the sample to be tested supplied to the mass spectrometer and the opening and closing of the supply pipeline can be realized.

[0044] When the valve core assembly 7 is working, gas is filled into the closed air chamber 709 through the inflation joint 708. The air pressure in the closed air chamber 709 increases, pushing the movable ring 707 to drive the valve core 703 to move toward the side close to the control chamber 4. The valve core 703 drives the sealing plug 706 to move synchronously when moving. The sealing plug 706 gradually approaches the control chamber 4, and the sample to be tested discharged from the discharge pipeline 5 gradually decreases. When the sealing plug 706 completely blocks the discharge pipeline 5, the corresponding discharge joint 6 will stop feeding. By controlling the inflation amount of the inflation joint 708, the downward moving distance of the sealing plug 706 can be controlled, thereby controlling the flow rate of the sample to be tested and the opening and closing of the corresponding discharge pipeline 5.

[0045] When the valve core assembly 7 is working, the valve core 703 will compress the buffer spring 705 when it moves downward. When the inflation joint 708 stops inflating, the buffer spring 705 will stretch due to its elastic potential energy, pushing the valve core 703 to drive the sealing plug 706 to return to its original state, so that the valve is opened and the material feeding continues. The existence of the buffer spring 705 can ensure that the valve can respond and open in time when inflation stops, thereby ensuring the response speed and normal use of the valve.

[0046] When the valve is closed, the inflation connector 708 fills gas into the closed air chamber 709, pushing the movable ring 707 downward, and the gas will fill the gap between the movable ring 707 and the upper cover body 716. The sealing ring 711 can effectively prevent the gas from escaping to the outside, ensuring the accuracy of flow control and saving energy.

[0047] The valve core 703 is installed for sliding, so it is difficult to avoid a gap at the contact point with the mounting seat 702, which may easily cause leakage of the sample to be tested or contamination of the sample to be tested, affecting the test results. A diaphragm 712 is clamped between the control chamber 4 and the valve core 703. When the valve core 703 moves toward the side close to the control chamber 4, the diaphragm 712 will be stretched. The existence of the arc-shaped protrusion 717 provides a margin for stretching, reduces the deviation of the diaphragm 712, ensures the sealing of the valve, effectively prevents leakage of the sample to be tested and contamination of the sample to be tested by the control gas, and avoids the valve affecting the detection accuracy of the mass spectrometer.

[0048] When the movable ring 707 moves toward the control chamber 4, the gap between the movable ring 707 and the mounting seat 702 will be compressed, and the pressure will increase, which may cause the mounting seat 702 to expand and cause gas leakage. When the movable ring 707 moves away from the control chamber 4, the gap increases and the air pressure decreases, which may cause the movable ring 707 and the valve core 703 to fail to reset normally, affecting the normal use of the valve. The existence of the air vent 8 ensures that the pressure in the gap is always the same as the external gas, and does not cause the mounting seat 702 to expand and the pressure to decrease, affecting the reset of the valve core 703, thereby ensuring the normal use of the valve.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A two-valve group valve island for an isotope mass spectrometer, characterized in that: The two-valve group valve island for an isotope mass spectrometer comprises a valve body (1), a feed pipeline (3) is provided inside the valve body (1), a feed connector (2) is installed on the feed pipeline (3), two discharge pipelines (5) are provided inside the valve body (1), discharge connectors (6) are installed on the two discharge pipelines (5), the feed pipeline (3) and the two discharge pipelines (5) are connected through a control chamber (4), and valve core components (7) are provided on the two control chambers (4).

2. A two-valve group valve island for isotope mass spectrometer according to claim 1, characterized in that: The valve core assembly (7) comprises a mounting hole (701), a mounting seat (702), a valve core (703), a push rod (704), a buffer spring (705), a sealing plug (706), a movable ring (707), an inflation joint (708), a sealed air chamber (709), a mounting groove (710), a sealing ring (711), a diaphragm (712), a buffer pad (713), a limit clamp (714), a collar (715), an upper cover body (716) and an arc-shaped protrusion (717); The valve body (1) is symmetrically provided with two mounting holes (701), the two mounting holes (701) being located at the same position as the control chamber (4), a mounting seat (702) being installed above the two mounting holes (701), a valve core (703) being slidably installed in the mounting seat (702), a sealing plug (706) being installed at one end of the valve core (703) close to the control chamber (4), a movable ring (707) being slidably installed in the mounting seat (702), an upper cover body (716) being installed above the mounting seat (702), an inflation joint (708) being installed on the upper cover body (716), a sealed air chamber (709) being provided on the upper cover body (716), and a portion of the valve core (703) extending into the sealed air chamber (709).

3. A two-valve group valve island for isotope mass spectrometer according to claim 2, characterized in that: The outer sleeve of the valve core (703) is provided with a buffer spring (705), and the buffer spring (705) is located in the gap between the mounting seat (702) and the movable ring (707).

4. A two-valve group valve island for isotope mass spectrometer according to claim 3, characterized in that: A limit clamp (714) is installed on the valve core (703), and the limit clamp (714) is located outside the buffer spring (705) and close to the upper cover body (716).

5. The two-valve group valve island for isotope mass spectrometer according to claim 4, characterized in that: The movable ring (707) is provided with a mounting groove (710) on the outside, a sealing ring (711) is installed in the mounting groove (710), and a sleeve ring (715) can be installed on the mounting groove (710), and the sleeve ring (715) is located on the outside of the sealing ring (711).

6. A two-valve group valve island for isotope mass spectrometer according to claim 5, characterized in that: A diaphragm (712) is installed between the mounting seat (702) and the mounting hole (701), a buffer pad (713) is installed on the push rod (704), and the diaphragm (712) is sandwiched between the buffer pad (713) and the valve core (703) at the center of the circle.

7. A two-valve group valve island for isotope mass spectrometer according to claim 6, characterized in that: The diaphragm (712) is provided with a circle of arc-shaped protrusions (717), and the protrusions of the arc-shaped protrusions (717) face the direction of the control chamber (4).

8. The two-valve group valve island for isotope mass spectrometer according to claim 7, characterized in that: The mounting seat (702) is provided with an air vent (8), wherein the air vent (8) communicates with the outside world and the interior of the movable ring (707).

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