Quick closing automatic pneumatic valve

Abstract

The application discloses a quick-closing automatic pneumatic valve, which comprises a fluid pipeline, a valve body, a valve core, a valve rod, a main gas chamber, a diaphragm and a gas generating mechanism. The fluid pipeline is connected with a fluid outlet of the valve body. The valve core and the valve rod are located in the valve body, and the valve core is fixedly connected with the lower end of the valve rod. The upper end of the valve rod extends into the main gas chamber. The diaphragm divides the main gas chamber into a lower chamber and an upper chamber. The upper chamber is connected with the gas generating mechanism through a pipeline. The gas generating mechanism comprises a secondary gas chamber, a piston, a piston rod, a sharp rod, a liquid containing bottle and a solid containing bottle. When an accidental failure occurs in a gas source, the pressure change of the fluid pipeline is utilized to control the pneumatic valve to be closed in a reliable and timely manner.

Description

Technical Field

[0001] This application relates to the field of pneumatic valve technology, and in particular to a fast-closing self-regulating pneumatic valve. Background Technology

[0002] A pneumatic valve is an industrial automation actuator that uses compressed air as a power source. By controlling the pressure or flow rate of the compressed air, it drives the valve to operate, thereby achieving the on / off switching or flow regulation of media (liquids, gases, etc.). Its core working principle can be summarized as "compressed air drives the actuator → the actuator pushes the valve body to move → the valve body controls the flow of the medium." The process involves the control system, such as a PLC or solenoid valve, outputting commands. Compressed air enters the main air chamber of the actuator through an air pipe, such as the upper chamber of the diaphragm, the piston side, or a gear and rack cylinder, thus causing the actuator to push the valve body to move. However, due to various factors, the air supply may occasionally be interrupted or insufficient, leading to pneumatic valve failure.

[0003] For example, during winter, a chemical plant's downstream gas storage tank had reached its gas volume target, necessitating the closure of the upstream gas pipeline. However, due to moisture in the gas source and ice buildup in the duct at low temperatures, the pneumatic valve on the pipeline lost its actuation force and could not close. This caused the pressure inside the storage tank to rise continuously, creating a safety hazard. If the situation was not handled promptly, the high pressure in the storage tank could potentially lead to an accident.

[0004] Currently, there is no good solution to the problem of pneumatic valve failure caused by occasional air source malfunctions; the only solution is to eliminate potential hazards through routine inspections. Utility Model Content

[0005] In view of this, this application proposes a fast-closing self-controllable pneumatic valve that can still quickly and automatically close after the air source fails.

[0006] 8. A quick-closing self-regulating pneumatic valve includes a fluid pipeline, a valve body, a valve core, a valve stem, a main air chamber, and a diaphragm. The fluid pipeline is connected to the fluid outlet of the valve body. The valve core and valve stem are located inside the valve body. The lower end of the valve core and valve stem are fixedly connected. The upper end of the valve stem extends into the main air chamber. The diaphragm divides the main air chamber into a lower chamber and an upper chamber.

[0007] It also includes a gas generating mechanism,

[0008] The gas generating mechanism includes: a secondary gas chamber;

[0009] The piston, piston rod, and spike rod are located in the auxiliary gas chamber; one end of the piston rod and spike rod are connected to the piston, and the other end of the piston rod is connected to the inner wall of the left chamber. The piston divides the auxiliary gas chamber into a left chamber and a right chamber. The left chamber is connected to the upper chamber through a pipe, and the right chamber is connected to a fluid pipe.

[0010] A liquid containment bottle is detachably connected to the top of the left chamber, with the bottle opening sealed and horizontally aligned with the spiked rod;

[0011] A solid containment bottle is detachably connected to the bottom of the left chamber, with the bottle opening open;

[0012] The liquid in the liquid container can react with the solid in the solid container to produce gas.

[0013] Preferably, a one-way valve is provided on the pipeline between the main gas chamber and the auxiliary gas chamber.

[0014] Preferably, the liquid containment bottle is threaded to the top of the left chamber; the solid containment bottle is threaded to the bottom of the left chamber.

[0015] Preferably, the quick-closing self-control pneumatic valve further includes a pressure sensor, which is disposed on the side wall of the left chamber of the auxiliary gas chamber. The pressure sensor is electrically connected to the controller in the monitoring room to transmit the pressure information of the left chamber to the controller.

[0016] Preferably, the liquid containing bottle has a sealing film at the bottle opening to facilitate the piercing of the bottle opening by a piercing tool.

[0017] Preferably, the liquid containment bottle contains water, and the solid containment bottle contains calcium carbide powder.

[0018] Preferably, the mouth of the solid containment bottle is located directly below the mouth of the liquid containment bottle.

[0019] Beneficial Effects: Under normal use, the quick-closing self-regulating pneumatic valve of this application is controlled by an external air source, such as compressed air, to close. When the external air source is interrupted or insufficient, the increased pressure in the downstream tank pushes the piston, causing the spiked rod to pierce the mouth of the liquid container, allowing the liquid to flow out and into the solid container. The gas produced by the reaction between the liquid and solid enters the upper chamber of the main air chamber of the pneumatic valve through the pipeline, increasing the pressure in the upper chamber and pushing the valve stem downwards, thereby closing the valve core. Thus, when an intermittent air source failure occurs, this application utilizes pressure changes in the fluid pipeline to control the closure of the pneumatic valve reliably and promptly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the quick-closing self-regulating pneumatic valve of this utility model;

[0021] Figure 2 This is a cross-sectional view of the quick-closing self-regulating pneumatic valve of this utility model;

[0022] Figure 3 for Figure 2 A schematic diagram of a partial structure;

[0023] Figure 4 This is a schematic diagram of a preferred embodiment of a liquid containment bottle.

[0024] Explanation of reference numerals in the attached drawings: fluid pipe 10, valve body 20, valve core 30, valve stem 40, main gas chamber 50, diaphragm 60, gas generating mechanism 70, auxiliary gas chamber 701, piston 702, piston rod 703, spiked rod 704, liquid containment bottle 705, solid containment bottle 706, one-way valve 80, pressure sensor 90. Detailed Implementation

[0025] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0026] It should be noted that when a device is considered to be "connected" to another device, it can be directly connected to the other device or there may be an intervening device present. The terms "inside," "top," "upper," "lower," "above," "below," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] 9. Please refer to Figures 1 to 3 The quick-closing self-regulating pneumatic valve includes a fluid pipeline 10, a valve body 20, a valve core 30, a valve stem 40, a main air chamber 50, and a diaphragm 60. The fluid pipeline 10 is connected to the fluid outlet of the valve body 20. The valve core 30 and the valve stem 40 are located inside the valve body 20. The lower end of the valve core 30 and the valve stem 40 are fixedly connected. The upper end of the valve stem 40 extends into the main air chamber 50. The diaphragm 60 divides the main air chamber 50 into a lower chamber and an upper chamber.

[0029] It also includes a gas generating mechanism 70,

[0030] The gas generating mechanism 70 includes: a secondary gas chamber 701;

[0031] Piston 702, piston rod 703, and spiked rod 704 are located in the auxiliary gas chamber 701; one end of piston rod 703 and spiked rod 704 are connected to the piston, and the other end of piston rod 703 is connected to the inner wall of the left chamber. Piston 702 divides the auxiliary gas chamber 701 into a left chamber and a right chamber. The left chamber is connected to the upper chamber through a pipe, and the right chamber is connected to the fluid pipe 10.

[0032] A liquid containment bottle 705 is detachably connected to the top of the left chamber. The bottle mouth of the liquid containment bottle 705 is sealed and horizontally aligned with the spiked rod 704.

[0033] Solid containment bottle 706 is detachably connected to the bottom of the left chamber, and the mouth of solid containment bottle 706 is open;

[0034] The liquid in the liquid container 705 reacts with the solid in the solid container 706 to produce gas.

[0035] The valve body 20, valve core 30, valve stem 40, main air chamber 50, and diaphragm 60 of this application are all the same as the structure of existing pneumatic valves. The difference between this application and the prior art is that it is equipped with a gas generating mechanism 70.

[0036] The gas generating mechanism 70 of this application pushes the piston 702 by pressure when the pressure in the downstream storage tank is too high, thereby puncturing the bottle opening and causing the solid and liquid substances in the auxiliary gas chamber 701 to mix, rapidly generating a large amount of gas, increasing the pressure in the left chamber and the upper chamber, and pushing the valve core 30 to close.

[0037] The piston 702 of this application has sealing and mobility. Depending on the pressure start-up conditions, the tightness between the piston 702 and the inner wall of the auxiliary gas chamber 701 varies, i.e., the static friction varies.

[0038] When the gas pressure in the left chamber increases, it will push the piston 702 to move in the opposite direction. The piston rod 703 can limit the movement of the piston 702, thereby maintaining a high-pressure state in the left chamber.

[0039] Both the liquid containment bottle 705 and the gas containment bottle in this application are detachable. After the solid and liquid react, the reactants become ineffective. If the apparatus needs to continue using it, the solid containment bottle 706 and the liquid containment bottle 705 need to be removed and refilled with the solid and liquid reactants.

[0040] The opening of the liquid containment bottle 705 of this application should be kept closed under normal circumstances. The sealing methods for the bottle opening are already quite mature, and for example, the sealing methods used for the openings of milk tea and yogurt bottles can be used in this device.

[0041] Therefore, in a preferred embodiment, the mouth of the liquid containing bottle 705 is provided with a sealing film to facilitate the piercing of the bottle mouth by a spike.

[0042] The liquid in the liquid containment bottle 705 exerts relatively low pressure on the bottle opening. In addition to sealing film, easily damaged materials such as rubber, plastic sheets, and sealing wax can also be used to seal the bottle opening in this application.

[0043] The spiked rod 704 of this application can have a groove on its spike head, so that after piercing the bottle opening, the liquid can flow down along the groove.

[0044] Since the pneumatic valve needs to be closed normally and an external air source is used for air supply, in order to reduce the air consumption of the air source, in a preferred embodiment, a one-way valve 80 is provided on the pipeline between the main air chamber 50 and the auxiliary air chamber 701. By setting the one-way valve 80, the gas from the air source will not enter the auxiliary air chamber 701.

[0045] Similarly, a one-way valve 80 can be installed near the upper chamber of the gas source pipeline. In this way, the gas released from the solid-liquid mixture in the auxiliary gas chamber 701 will not enter the gas source pipeline, thereby increasing the pressure in the main gas chamber 50 more quickly and thus controlling the pneumatic valve to close more quickly.

[0046] Because the gas pressure generated by the solid-liquid mixture is relatively high, considering ease of installation, sealing, and pressure resistance, in a preferred embodiment, the liquid containment bottle 705 is threadedly connected to the top of the left chamber; the solid containment bottle is threadedly connected to the bottom of the left chamber. The threaded opening of the left chamber in the figure is a simplified version. In actual use, a threaded interface should be provided on the side wall of the left chamber to connect the solid containment bottle 706 and the liquid containment bottle 705. Considering that the mouth of the liquid containment bottle 705 needs to be pierced by the spiked rod 704, such as... Figure 4 As shown, the liquid containment bottle 705 has a long neck, the bottle body or neck is provided with external threads, and the bottle mouth of the liquid containment bottle 705 is on the side of the neck.

[0047] When the pneumatic valve closes, personnel are unsure whether the closure is due to the gas generator 70 or an external gas source. This can cause inconvenience for staff management.

[0048] Therefore, in a preferred embodiment, the quick-closing self-control pneumatic valve further includes a pressure sensor 90, which is disposed on the side wall of the left chamber of the auxiliary gas chamber 701. The pressure sensor 90 is electrically connected to the controller in the monitoring room to transmit the pressure information of the left chamber to the controller.

[0049] If the pneumatic valve is closed due to the gas generating mechanism 70, the gas pressure in the left chamber will be higher than normal. In this case, operators only need to check the pressure information from the pressure sensor 90 to understand the reason for the pneumatic valve closure and take timely countermeasures, such as inspecting the external gas source or refilling the solid containment bottle 706 and the liquid containment bottle 705.

[0050] There are several combinations of solid-liquid mixtures that release large amounts of gas, such as hydrochloric acid and calcium carbonate, hydrogen peroxide and zinc, and ammonium chloride and calcium hydroxide. However, considering factors such as cost, safety, and corrosiveness,

[0051] In a preferred embodiment, the liquid containment bottle 705 contains water, and the solid containment bottle 706 contains calcium carbide powder.

[0052] The reaction between water and calcium carbide releases a large amount of gas and heat, which can effectively increase the pressure in the main gas chamber 50. At the same time, calcium carbide is a relatively inexpensive industrial raw material and is also relatively safe.

[0053] The ratio of calcium carbide to water depends on the required pressure. The gas pressure in the left chamber is related to the gas volume and chamber volume. The volume and location of the left chamber in the diagram are for illustrative purposes only. Theoretically, the smaller the volume of the left chamber, the better. The closer the left chamber is to the main gas chamber 50, the better. This way, a small amount of gas can generate a large pressure.

[0054] In order to allow the solid and liquid to react more quickly, in a preferred embodiment, the mouth of the solid containment bottle 706 is located directly below the mouth of the liquid containment bottle 705.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A quick-closing self-controlled pneumatic valve, comprising a fluid pipe (10), a valve body (20), a valve core (30), a valve stem (40), a main air chamber (50), and a diaphragm (60), wherein the fluid pipe (10) is connected to the fluid outlet of the valve body (20), the valve core (30) and the valve stem (40) are located inside the valve body (20), the lower end of the valve core (30) and the valve stem (40) are fixedly connected, the upper end of the valve stem (40) extends into the main air chamber (50), and the diaphragm (60) divides the main air chamber (50) into a lower chamber and an upper chamber; Its features are: It also includes a gas generating mechanism (70). The gas generating mechanism (70) includes: a secondary gas chamber (701); Piston (702), piston rod (703) and spike rod (704) are located in the auxiliary gas chamber (701); one end of piston rod (703) and spike rod (704) are connected to piston, and the other end of piston rod (703) is connected to the inner wall of left chamber. Piston (702) divides auxiliary gas chamber (701) into left chamber and right chamber. Left chamber is connected to upper chamber through pipe, and right chamber is connected to fluid pipe (10). A liquid containment bottle (705) is detachably connected to the top of the left chamber, the bottle mouth of which is sealed and horizontally aligned with the spiked rod (704); A solid containment bottle (706) is detachably connected to the bottom of the left chamber, with the bottle opening of the solid containment bottle (706) open; The liquid in the liquid container (705) reacts with the solid in the solid container (706) to produce gas.

2. The quick-closing self-regulating pneumatic valve as described in claim 1, characterized in that: A one-way valve is provided on the pipeline between the main gas chamber (50) and the auxiliary gas chamber (701).

3. The quick-closing self-regulating pneumatic valve as described in claim 1, characterized in that: The liquid containment bottle (705) is threaded to the top of the left chamber; the solid containment bottle (706) is threaded to the bottom of the left chamber.

4. The quick-closing self-regulating pneumatic valve as described in claim 1, characterized in that: The quick-closing self-controlled pneumatic valve also includes a pressure sensor (90), which is located on the side wall of the left chamber of the auxiliary gas chamber (701). The pressure sensor (90) is electrically connected to the controller in the monitoring room to transmit the pressure information of the left chamber to the controller.

5. A quick-closing self-regulating pneumatic valve as described in claim 1, characterized in that: The liquid containment bottle (705) has a sealing film at the bottle opening to facilitate the piercing of the bottle opening by a thorn.

6. The quick-closing self-regulating pneumatic valve as described in claim 1, characterized in that: The liquid containment bottle (705) contains water, and the solid containment bottle (706) contains calcium carbide powder.

7. A quick-closing self-regulating pneumatic valve as described in claim 1, characterized in that: The mouth of the solid containment bottle (706) is located directly below the mouth of the liquid containment bottle (705).

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