Self-balancing device for stabilizing air inlet pressure

Abstract

The utility model discloses a self-balancing device capable of stabilizing air inlet pressure, which comprises a valve seat, a valve core and a valve cover are arranged in the valve seat, the valve cover is connected with a balance valve air outlet, a sealing ring is clamped on the outer ring of the valve cover, a movable sealing ring is clamped on the outer ring of the valve core, and the movable sealing ring is connected with the valve cover. A conical surface base and a guide sealing ring are positioned in the middle of the front end of the valve element, a valve seat guide ring is positioned on the outer wall of the front end of the valve element, a conical surface base sealing ring is clamped on the outer ring of the conical surface base, and a balance valve air inlet and a balance valve negative pressure extraction opening are formed in the position, connected with the valve element, of the valve seat. The guide sealing ring is positioned between the valve seat and the valve seat guide ring for sealing, and the movable sealing ring moves between the valve seat and the valve element. According to the self-balancing device for stabilizing the air inlet pressure, the combined type self-balancing valve body is innovatively designed, electric driving is not needed, automatic movement of the valve element can be achieved only through pneumatic operation, and stability of the air inlet pressure is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling intake control with pressure fluctuation, in particular to a self-balancing device for stabilizing intake air pressure. Background Art

[0002] The self-balancing device of the intake air pressure is a supporting device for the intake control of gas sampling with pressure fluctuations. In the field of precision gas concentration detection, especially the detection based on optical detection technology, the stability of the air pressure in the detection chamber has an important influence on the stability of the detection results. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of the self-balancing device of the intake air pressure.

[0003] Normally, air pressure control can be achieved by using a proportional control valve combined with a pressure sensor and control software to automatically adjust the size of the valve opening to reduce the impact of air flow and air pressure fluctuations. However, in some harsh environments, such as high and low temperature conditions, the operating temperature can cause destructive damage to the electronically controlled actuator valve, resulting in an inability to control it, which has a certain adverse effect on the actual use process. For this reason, we propose a self-balancing device that stabilizes the intake air pressure. Utility Model Content

[0004] Technical problem solved: In view of the shortcomings of the prior art, the utility model provides a self-balancing device for stabilizing the intake air pressure. The innovatively designed combined self-balancing valve body does not require electric drive, but only requires pneumatic drive to achieve automatic movement of the valve core, ensuring the stability of the intake pressure, which can effectively solve the problems in the background technology.

[0005] Technical solution: To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a self-balancing device for stabilizing the intake air pressure, comprising a valve seat, a valve core and a valve cover are arranged inside the valve seat, a balancing valve outlet is connected to the valve cover, a sealing ring is engaged with the outer ring of the valve cover, a movable sealing ring is engaged with the outer ring of the valve core, a conical base and a guide sealing ring are positioned in the middle of the front end of the valve core, a valve seat guide ring is positioned on the front end outer wall of the valve core, a conical base sealing ring is engaged with the outer ring of the conical base, and a balancing valve inlet and a balancing valve negative pressure exhaust port are arranged at the position of the valve seat connected to the valve core.

[0006] Preferably, the guide sealing ring is positioned between the valve seat and the valve seat guide ring for sealing, the movable sealing ring moves between the valve seat and the valve core, and the sealing ring is positioned between the valve seat and the valve cover for sealing.

[0007] Preferably, the air outlet of the balancing valve is evacuated by a sampling pump, and negative pressure is generated between the valve cover and the valve core through the pipeline in the air circuit. The pressure between the valve core and the valve seat is atmospheric pressure. The valve core moves to the left under the influence of the air pressure, and the conical ventilation space inside the valve seat opens, and the air flow is unobstructed.

[0008] Preferably, the negative pressure exhaust port of the balancing valve is evacuated by a vacuum pump, negative pressure is formed between the valve core and the valve seat, and the valve core moves to the right under the pressure difference between the left and right sides. When the valve core moves to the right to the top, the top presses the position of the conical base sealing ring, and the airflow is blocked at this time.

[0009] Preferably, the valve seat guide ring is 1-2 mm higher than the wall surface of the valve seat in contact with it, and the structure of the valve seat guide ring is one of an integrated type or independently processed and then combined together.

[0010] Preferably, the left side of the valve core has a circumferential boss, the middle of the boss has a ventilation groove, and the valve cover has a concave surface, which forms an air chamber with the boss of the valve core.

[0011] Beneficial effects: Compared with the prior art, the utility model provides a self-balancing device for stabilizing the intake air pressure, which has the following beneficial effects: This self-balancing device for stabilizing the intake air pressure has an innovatively designed combined self-balancing valve body, which does not require electric drive, but only requires pneumatic drive to achieve automatic movement of the valve core, thereby ensuring the stability of the intake pressure. When the instrument starts sampling gas, the sampling pump of the instrument draws air from the position, and negative pressure is generated in the pipeline in the gas circuit and the space between the valve cover and the valve core, while atmospheric pressure is present between the valve core and the valve seat. In this way, when no high-pressure gas to be tested enters the valve body, the valve core will move to the left, and the conical ventilation space will open to keep the airflow unobstructed. Once high-pressure air flows into the valve body, the air pressure sensor on the pipeline will immediately detect that the pressure exceeds the limit. At this time, the control system immediately starts the vacuum pump to extract air from the negative pressure exhaust port of the balancing valve, which will form a negative pressure between the valve core and the valve seat. The valve core moves to the right under the pressure difference between its left and right sides. In the extreme case of excessive intake pressure, the top of the valve core presses the conical base seal ring, and the air path is blocked and no air can flow through the valve body. The air extraction pump can be controlled by PID adaptive control or by a feedback control unit to ensure that the valve core is in a suitable position, thereby ensuring that the air flow pressure entering the measuring air chamber is stable in the ideal range. The entire intake air pressure self-balancing device has a simple structure, is easy to operate, and has a better effect than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the overall structure of a self-balancing device for stabilizing intake air pressure.

[0013] Figure 2The utility model is a structural schematic diagram of the connection of the negative pressure suction port of the balancing valve in the self-balancing device for stabilizing the intake air pressure.

[0014] Figure 3 The utility model is a schematic diagram of the structure of a valve cover in a self-balancing device for stabilizing intake air pressure.

[0015] Figure 4 The utility model is a structural schematic diagram of a valve seat in a self-balancing device for stabilizing intake air pressure.

[0016] Figure 5 The utility model is a structural schematic diagram of a valve core in a self-balancing device for stabilizing intake air pressure.

[0017] In the figure: 1. valve seat; 2. conical base sealing ring; 3. conical base; 4. guide sealing ring; 5. valve seat guide ring; 6. movable sealing ring; 7. valve core; 8. valve cover; 9. balance valve air outlet; 10. balance valve air inlet; 11. sealing ring; 12. balance valve negative pressure exhaust port. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to illustrate the utility model, and should not be considered as limiting the scope of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-5 As shown, a self-balancing device for stabilizing the intake air pressure comprises a valve seat 1, a valve core 7 and a valve cover 8 are arranged inside the valve seat 1, a balancing valve outlet 9 is connected to the valve cover 8, a sealing ring 11 is clamped on the outer ring of the valve cover 8, a movable sealing ring 6 is clamped on the outer ring of the valve core 7, a conical base 3 and a guide sealing ring 4 are positioned in the middle of the front end of the valve core 7, a valve seat guide ring 5 is positioned on the front end outer wall of the valve core 7, a conical base sealing ring 2 is clamped on the outer ring of the conical base 3, a balancing valve air inlet 10 and a balancing valve negative pressure exhaust port 12 are arranged at the position connected to the valve core 7 on the valve seat 1, and the innovatively designed combined self-balancing valve body does not require electric drive, and only needs pneumatic drive to realize the automatic movement of the valve core, thereby ensuring the stability of the intake pressure.

[0022] Further, the guide sealing ring 4 is positioned between the valve seat 1 and the valve seat guide ring 5 for sealing, the movable sealing ring 6 moves between the valve seat 1 and the valve core 7, and the sealing ring 11 is positioned between the valve seat 1 and the valve cover 8 for sealing.

[0023] Furthermore, the air outlet 9 of the balancing valve is evacuated by a sampling pump, and negative pressure is generated between the valve cover 8 and the valve core 7 through the pipeline in the air circuit. The pressure between the valve core 7 and the valve seat 1 is atmospheric pressure. The valve core 7 moves to the left under the influence of the air pressure, and the conical ventilation space inside the valve seat 1 opens. At this time, the air flow is unobstructed.

[0024] Furthermore, the negative pressure exhaust port 12 of the balancing valve is evacuated by a vacuum pump, and negative pressure is formed between the valve core 7 and the valve seat 1, and the valve core 7 moves to the right under the pressure difference between the left and right sides. When the valve core 7 moves to the right to the top, the top presses the position of the conical base sealing ring 2, and the airflow is blocked at this time.

[0025] Furthermore, the valve seat guide ring 5 is 1-2 mm higher than the wall surface of the valve seat 1 in contact therewith, and the structure of the valve seat guide ring 5 is one of an integrated type or a structure that is independently processed and then combined together.

[0026] Furthermore, there is a circular boss on the left side of the valve core 7, a ventilation groove in the middle of the boss, and the valve cover 8 has a concave surface, which forms an air chamber with the boss of the valve core 7 to avoid the left side of the valve core 7 and the valve cover 8 overlapping, resulting in poor airflow.

[0027] Working principle: The utility model includes a valve seat 1, a conical base sealing ring 2, a conical base 3, a guide sealing ring 4, a valve seat guide ring 5, a movable sealing ring 6, a valve core 7, a valve cover 8, a balancing valve air outlet 9, a balancing valve air inlet 10, a sealing ring 11, and a balancing valve negative pressure exhaust port 12. When the instrument starts sampling gas, the sampling pump of the instrument draws air from position No. 1, and negative pressure is generated in the pipeline in the gas circuit and the space between the valve cover and the valve core, while atmospheric pressure is generated between the valve core and the valve seat. In this way, when no high-pressure gas to be tested enters the valve body, the valve core will move to the left, and the conical ventilation space will open to keep the airflow unobstructed. Once high-pressure air flows into the valve body, the air pressure sensor on the pipeline will immediately detect that the pressure exceeds the limit. At this time, the control system immediately starts the vacuum pump to extract air from the negative pressure exhaust port of the balancing valve, which will form a negative pressure between the valve core and the valve seat. The valve core moves to the right under the pressure difference between its left and right sides. In the extreme case of excessive intake pressure, the top of the valve core presses the conical base seal ring, and the air path is blocked and no air can flow through the valve body. The air extraction pump can be controlled by PID adaptive control or by a feedback control unit to ensure that the valve core is in a suitable position, thereby ensuring that the air flow pressure entering the measuring air chamber is stable in the ideal range. The innovative design of the combined self-balancing valve body does not require electric drive, and only requires pneumatic drive to achieve automatic movement of the valve core to ensure the stability of the intake pressure.

[0028] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A self-balancing device for stabilizing intake air pressure, comprising a valve seat (1), characterized in that: The valve seat (1) is provided with a valve core (7) and a valve cover (8) inside, the valve cover (8) is connected to a balancing valve air outlet (9), the outer ring of the valve cover (8) is engaged with a sealing ring (11), the outer ring of the valve core (7) is engaged with a movable sealing ring (6), a conical base (3) and a guide sealing ring (4) are positioned at the middle of the front end of the valve core (7), a valve seat guide ring (5) is positioned on the front end outer wall of the valve core (7), the outer ring of the conical base (3) is engaged with a conical base sealing ring (2), and a balancing valve air inlet (10) and a balancing valve negative pressure exhaust port (12) are provided at a position on the valve seat (1) connected to the valve core (7).

2. A self-balancing device for stabilizing intake air pressure according to claim 1, characterized in that: The guide sealing ring (4) is positioned between the valve seat (1) and the valve seat guide ring (5) for sealing, the movable sealing ring (6) moves between the valve seat (1) and the valve core (7), and the sealing ring (11) is positioned between the valve seat (1) and the valve cover (8) for sealing.

3. A self-balancing device for stabilizing intake air pressure according to claim 1, characterized in that: The balance valve air outlet (9) is evacuated by a sampling pump, and negative pressure is generated between the valve cover (8) and the valve core (7) through the pipeline in the air path. The pressure between the valve core (7) and the valve seat (1) is atmospheric pressure. The valve core (7) moves to the left under the influence of the air pressure, and the conical ventilation space inside the valve seat (1) is opened. At this time, the air flow is unobstructed.

4. A self-balancing device for stabilizing intake air pressure according to claim 1, characterized in that: The negative pressure exhaust port (12) of the balancing valve is evacuated by a vacuum pump, and negative pressure is formed between the valve core (7) and the valve seat (1). The valve core (7) moves to the right under the pressure difference between the left and right sides. When the valve core (7) moves to the right to the top, the top presses the position of the conical base sealing ring (2), and the airflow is blocked at this time.

5. A self-balancing device for stabilizing intake air pressure according to claim 1, characterized in that: The valve seat guide ring (5) is 1 to 2 mm higher than the wall surface of the valve seat (1) in contact with it, and the structure of the valve seat guide ring (5) is one of an integrated type or an independently processed and then combined type.

6. A self-balancing device for stabilizing intake air pressure according to claim 1, characterized in that: The valve core (7) has a circular boss on the left side, the boss has a venting groove in the middle, and the valve cover (8) has a concave surface, and forms an air chamber with the boss of the valve core (7).

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