Pressure regulating valve

Abstract

The invention relates to the technical field of gas valves, and particularly discloses a pressure regulating valve which comprises a valve body, an input pipe is fixedly connected to the left side of the valve body, a conveying pipe is fixedly connected to the right side of the valve body, a first pushing spring is arranged in the valve body, a membrane is fixedly connected to the bottom end of the first pushing spring, and a valve element is installed at the bottom end of the membrane. A mounting seat is fixedly connected to the outer side of the input pipe, a safe closing mechanism used for closing a channel of the input pipe is arranged in the mounting seat, and the safe closing mechanism comprises an electric push rod fixedly connected to the interior of the mounting seat. The electric push rod can drive the closing plate to descend under the cooperation of other structures, so that the closing plate closes a fuel gas channel in the input pipe, the fuel gas is prevented from directly flowing into the low-pressure end from the high-pressure end without pressure reduction, the risk of leakage and detonation of the fuel gas is prevented from being increased sharply, and the safety risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas valve technology, specifically a pressure regulating valve. Background Art

[0002] As a precision automatic regulating device installed in a gas pipeline system, the core function of a pressure regulating valve is to sensitively capture fluctuations in the inlet gas pressure through a built-in pressure sensing element, and then automatically adjust the valve opening with the help of a complex mechanical or electronic control mechanism to accurately stabilize the gas pressure within a preset output pressure range. This seemingly simple working principle contains extremely important application value and wide range of uses, ensuring the safety of gas supply in industrial production. Pressure regulating valves are indispensable in the industrial field. As an important energy source or raw material, the stability of gas pressure directly affects the progress of chemical reactions and product quality. Pressure regulating valves can ensure a stable gas supply to multiple gas consumption points at the same time, avoiding the impact of pressure fluctuations on industrial production. In addition, in the long-distance transmission of gas, pressure regulating valves can also achieve pressure staged regulation, gradually reducing the pressure of high-pressure gas to a pressure suitable for user use, ensuring the safe and efficient transmission of gas in complex pipeline networks.

[0003] In existing technologies, pressure regulating valves, as key pressure control devices in gas transmission, play a crucial role in smoothly converting gas from a high-pressure state to a low-pressure state. With the continuous accumulation of usage time, the diaphragm inside the pressure regulating valve faces extremely severe working environment challenges. Under the continuous impact and compression of high-pressure gas for a long time, the diaphragm may experience fatigue aging, decreased toughness, and other problems, which may lead to rupture. Once the diaphragm ruptures, the pressure regulating valve will completely lose its ability to regulate gas pressure. The high-pressure gas that should have undergone pressure reduction will flow directly from the high-pressure end to the low-pressure end without any obstruction, causing a sharp increase in gas output pressure and greatly increasing the risk of gas leakage and deflagration, thus increasing safety risks. To address this, we propose a pressure regulating valve. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure regulating valve to solve the problem mentioned in the background art where the diaphragm inside the pressure regulating valve ruptures under long-term gas pressure, causing gas to flow directly from the high-pressure end to the low-pressure end without being depressurized, resulting in a sharp increase in output pressure, a significant increase in the risk of gas leakage and deflagration, and an increase in safety risks.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressure regulating valve, comprising a valve body, an input pipe fixedly connected to the left side of the valve body, a delivery pipe fixedly connected to the right side of the valve body, a push spring 1 disposed inside the valve body, a diaphragm fixedly connected to the bottom end of the push spring 1, a valve core mounted on the bottom end of the diaphragm, a mounting base fixedly connected to the outside of the input pipe, and a safety closing mechanism for closing the input pipe channel disposed inside the mounting base.

[0006] The safety closing mechanism includes an electric push rod fixedly connected inside the mounting base. A closing plate is fixedly connected to the bottom end of the electric push rod, and the outer side of the closing plate is slidably connected inside the input pipe.

[0007] The diaphragm is fixedly connected to a drive rod at its top end, and the mounting base is fixedly connected to an opening controller at its top end. A control rod is slidably connected inside the opening controller, and the control rod is installed inside the drive rod.

[0008] The top of the input tube is fixedly connected to an installation sleeve, and the top of the inner part of the installation sleeve is fixedly connected to a conductive block.

[0009] The mounting sleeve has a sliding rod inside, and a conductive block 2 is fixedly connected to the top of the sliding rod.

[0010] The bottom end of the sliding rod is fixedly connected to a push plate, the outer side of the push plate is slidably connected to the inside of the mounting sleeve, and a push spring is sleeved on the outer side of the sliding rod.

[0011] The input pipe has a sensor installed at the top, and part of the sensor, which is used to sense the gas pressure inside the input pipe, is located inside the input pipe. A button is installed at the top inside the valve body.

[0012] The mounting base has a motor fixedly connected inside, and the drive end of the motor is fixedly connected to a closed rotating plate. The outer side of the closed rotating plate is rotatably connected to the inside of the input tube.

[0013] An alarm light and an alarm sounder are fixedly connected to the top of the valve body.

[0014] The valve body has an adjustment knob installed at the top inside, and an adjuster installed at the bottom of the adjustment knob.

[0015] This invention has at least the following beneficial effects: When the vent valve is in operation, if the diaphragm is damaged, the electric push rod will, with the cooperation of other structures, drive the closing plate to descend, so that the closing plate closes the gas passage in the input pipe, preventing gas from rushing directly from the high-pressure end to the low-pressure end without depressurization, thus avoiding a significant increase in the risk of gas leakage and deflagration, and reducing safety risks. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the structure of the present invention; Figure 2 This is a schematic diagram of the conveying pipe structure of the present invention; Figure 3 This is a schematic diagram of the adjusting knob structure of the present invention; Figure 4 This is a schematic diagram of the valve core structure of the present invention; Figure 5 This is a schematic diagram of the controller structure of the present invention; Figure 6 This is a schematic diagram of the regulator structure of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 for Figure 2 Enlarged view of section B in the middle.

[0017] In the diagram: 1. Valve body; 2. Input pipe; 3. Delivery pipe; 4. Push spring one; 5. Diaphragm; 6. Valve core; 7. Mounting base; 8. Safety closing mechanism; 801. Electric push rod; 802. Closing plate; 803. Drive rod; 804. Opening controller; 805. Control rod; 806. Mounting sleeve; 807. Power-conducting block one; 808. Sliding rod; 809. Power-conducting block two; 810. Push plate; 811. Push spring two; 9. Adjusting knob; 10. Regulator; 11. Sensor; 12. Button; 14. Motor; 15. Closing rotating plate; 16. Alarm light; 17. Alarm sounder. Detailed Implementation

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0019] Example 1 Please see Figures 1 to 8This invention provides a technical solution: a pressure regulating valve, including a valve body 1. The valve body 1, as the core load-bearing component, is made of high-strength, corrosion-resistant alloy material, capable of withstanding high gas pressure and ensuring long-term stable operation. A left-side input pipe 2 is used to connect to high-pressure gas, and a right-side delivery pipe 3 outputs stable-pressure gas, forming the main gas flow channel. It is compatible with household gas stoves, water heaters, and other terminal devices. The left side of the valve body 1 is fixedly connected to the input pipe 2, and the right side is fixedly connected to the delivery pipe 3. A push spring 4 is installed inside the valve body 1, forming a linkage structure with a diaphragm 5 and a valve core 6. The push spring 4 provides initial pressure, and the diaphragm 5 senses changes in gas pressure and drives the valve core 6 to move up and down. When the input pressure increases, the diaphragm 5 compresses the push spring 4, and the valve core 6 moves upward to reduce the flow area and lower the output pressure. When the pressure decreases, the spring pushes the diaphragm 5 to reset, and the valve core 6 moves downward to increase the flow and maintain stable pressure. The bottom end of the push spring 4 is fixedly connected to the diaphragm 5. The push spring 4 is made of a high elastic coefficient alloy material and has a fatigue life of more than 100,000 cycles. The initial preload can provide a reference pressure of 0.01 MPa.Diaphragm 5 is made of nitrile rubber and fiber-reinforced composite material with moderate thickness, possessing excellent flexibility and airtightness. It can sensitively detect pressure changes at the 0.001MPa level. Diaphragm 5 has excellent elasticity. Diaphragm 5 and valve core 6 are rigidly connected by high-strength bolts. Valve core 6 is a conical metal valve head with a hard chrome plated surface. Its fit with the sealing seat inside valve body 1 is accurate to 0.01mm, ensuring zero leakage when closed. Valve core 6 is installed at the bottom of diaphragm 5. When high-pressure gas enters valve body 1 through input pipe 2, the pressure acts on the upper surface of diaphragm 5, increasing the pressure on diaphragm 5. It overcomes the elastic force of push spring 4 and moves upward, causing valve core 6 to move upward. Valve core 6 is used to close the gas passage inside valve body 1. After valve core 6 moves upward, the cross-sectional area of ​​the gas flow passage inside valve body 1 decreases from the initial 100mm² to 60mm². According to Bernoulli's equation, the gas flow velocity increases and the pressure decreases, ultimately outputting a stable 0.003MPa through delivery pipe 3. When the input pressure decreases, the spring 4 releases its elastic force, causing the diaphragm 5 and valve core 6 to reset, increasing the flow area and maintaining stable output pressure. A mounting base 7 is fixedly connected to the outside of the input pipe 2. The mounting base 7 is designed for easy installation of the safety closing mechanism 8 and other structures. The mounting base 7 contains the safety closing mechanism 8 for closing the input pipe 2 channel. An adjusting knob 9 is installed at the top of the valve body 1. The adjusting knob 9 at the top of the valve body 1 uses a gear transmission structure, ensuring high rotational accuracy. Each rotation changes the preload of the spring 4 by 0.0005 MPa. The regulator 10 is a screw-type adjusting mechanism that meshes with the adjusting knob 9 via a worm gear, converting rotational motion into linear displacement to precisely adjust the preload of the spring 4. The adjusting knob 9 can be adjusted in height by rotation. An regulator 10 is installed at the bottom of the adjusting knob 9, which works with the adjusting knob 9 to adjust the preload of the spring 4. The adjusting knob 9 at the top of the valve body 1 and the regulator 10... In conjunction with this, the preload of the push spring 4 can be changed by rotating the adjustment knob 9, so as to achieve fine adjustment of the output pressure and meet the needs of different application scenarios.

[0020] The safety closing mechanism 8 includes an electric push rod 801 fixedly connected inside the mounting base 7, and a pressure trigger circuit is installed inside the mounting sleeve 806 at the top of the input tube 2. The first energized conductor 807 and the second energized conductor 809 are made of beryllium bronze with a gold-plated surface. The pneumatically driven push plate 810 overcomes the elastic force of the second push spring 811 and moves upward, causing the sliding rod 808 and the second energized conductor 809 to rise synchronously. When the second energized conductor 809 contacts the first energized conductor 807, a complete circuit is formed, providing power to the electric push rod 801. The electric push rod 801 is connected to the opening controller 804 and can be controlled by the opening controller 804 to raise and lower the closing plate 802. The bottom end of the electric push rod 801 is fixedly connected to the closing plate 802. The closing plate 802 can open and close the gas passage in the input pipe 2 during raising and lowering. The outer side of the closing plate 802 is slidably connected to the inside of the input pipe 2. The electric push rod 801 drives the closing plate 802 to slide along the inner wall of the input pipe 2, remaining open under normal conditions. When the system detects an abnormality such as overpressure or diaphragm 5 rupture, the electric push rod 801... Upon activation, the closing plate 802 quickly seals the input pipe channel 2, cutting off the gas supply and preventing high-pressure gas from directly entering the downstream.

[0021] A drive rod 803 is fixedly connected to the top of the diaphragm 5. The drive rod 803 at the top of the diaphragm 5 cooperates with the control rod 805. When the diaphragm 5 breaks, the drive rod 803 loses the support of the diaphragm 5. Under the action of the push spring 4, the drive rod 803 drives the control rod 805 to descend inside the opening controller 804, triggering the opening controller 804, which in turn activates the electric push rod 801 to achieve emergency cut-off. The top of the mounting base 7 is fixedly connected to the opening controller 804. The opening controller 804 can control the electric push rod 801. The control rod 805 is slidably connected inside the opening controller 804. The control rod 805 is installed inside the drive rod 803.

[0022] An installation sleeve 806 is fixedly connected to the top of the input pipe 2. The installation sleeve 806 is designed to facilitate the installation of other internal structures. An energizing block 807 is fixedly connected to the top of the inside of the installation sleeve 806. When the energizing block 807 and the energizing block 809 are in contact, they can supply power to the electric push rod 801, at which point the electric push rod 801 can be activated. The prerequisite for the energizing block 809 and the energizing block 807 to be in contact is that the gas pressure in the input pipe 2 increases. When the gas pressure in the input pipe 2 is high, the push plate 810 will rise inside the installation sleeve 806 under the pressure. A sliding rod 808 is slidably connected inside the installation sleeve 806. The sliding rod 808 will drive the energizing block 809 to rise under the drive of the push plate 810. When the energizing block 809 contacts the energizing block 807, the electric push rod 801 will be powered. The top of the sliding rod 808 is fixedly connected to the energizing block 809.

[0023] A pusher plate 810 is fixedly connected to the bottom end of the sliding rod 808. The pusher plate 810 is designed to drive the sliding rod 808 and the second energized block 809 under the pressure of the gas in the input pipe 2. The outer side of the pusher plate 810 is slidably connected to the inside of the mounting sleeve 806. A pusher spring 811 is sleeved on the outer side of the sliding rod 808. The pusher spring 811 is designed to push the pusher plate 810 after the pressure of the gas supplied in the input pipe 2 returns to normal, thereby resetting the sliding rod 808 and the second energized block 809.

[0024] When the gas pressure inside valve body 1 is normal, the push spring 4 inside valve body 1 will push valve core 6, causing valve core 6 to open the gas passage inside valve body 1. At this time, the gas space is large, and the gas can enter the delivery pipe 3 normally from valve body 1 and be output from delivery pipe 3. When high-pressure gas enters valve body 1 through input pipe 2, the high-pressure gas will first act on the surface of diaphragm 5 and push diaphragm 5. At this time, diaphragm 5 will drive valve core 6 to rise. The higher the height of valve core 6 inside valve body 1, the smaller the gas passage space inside valve body 1. The height of valve core 6 is controlled by the gas pressure entering valve body 1. Within a certain range, the greater the gas pressure entering valve body 1, the greater the gas pressure on diaphragm 5, and diaphragm 5 will drive valve core 6 to move higher. In this way, within a certain range, the greater the gas pressure sent from input pipe 2, the smaller the gas passage inside valve body 1 controlled by valve core 6, and finally the gas pressure output from delivery pipe 3 becomes normal.

[0025] When diaphragm 5 is damaged, the gas pressure delivered by the delivery pipe 3 to the valve body 1 cannot effectively act on diaphragm 5. At this time, the push spring 4 will push diaphragm 5 down. When diaphragm 5 descends, it will drive rod 803 down. Rod 803 will drive control rod 805 to slide downward inside the opening controller 804. After control rod 805 slides down a certain distance inside the opening controller 804, the opening controller 804 will activate electric push rod 801, thereby causing electric push rod 801 to press down closing plate 802, so that closing plate 802 closes the gas passage in input pipe 2. Of course, before this, electric push rod 801 is in a de-energized state. Only when the gas pressure in input pipe 2 is high, and the gas in input pipe 2 pushes push plate 810 and sliding rod 808 are still... There is a second energized conductive block 809. This second energized conductive block 809 contacts the first energized conductive block 807. Only after this contact is made will the electric push rod 801 be energized. When the electric push rod 801 is energized and activated by the controller 804, it will drive the closing plate 802 to descend, closing the gas passage in the input pipe 2. If the diaphragm 5 ruptures while the vent valve is operating, the electric push rod 801, in conjunction with other structures, will drive the closing plate 802 to descend, closing the gas passage in the input pipe 2. This prevents gas from flowing directly from the high-pressure end to the low-pressure end without depressurization, thus reducing the risk of gas leakage and explosion and minimizing safety risks.

[0026] Example 2 In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that a sensor 11 is installed at the top of the input pipe 2. The sensor 11 can sense the pressure of the gas passing through the input pipe 2. A portion of the sensor 11 used to sense the gas pressure in the input pipe 2 is located inside the input pipe 2. A button 12 is installed at the top of the valve body 1. When the button 12 is pressed by the valve core 6, it transmits a signal to the sensor 11. When the sensor 11 detects a high gas pressure in the input pipe 2, the motor 14 is started, thereby driving the closed rotating plate 15 to rotate, allowing the closed rotating plate 15 to deliver gas into the input pipe 2. When the pressure regulating valve is working normally, the gas pressure in the input pipe 2 is relatively high, and the valve core 6 will also rise a little under the action of the diaphragm 5. At this time, the space for gas to pass through the valve body 1 will become smaller, and the valve core 6 will not touch the button 12. However, when the diaphragm 5 is damaged, the diaphragm 5 cannot drive the valve core 6 to rise under the push of the gas pressure. At this time, the valve core 6 will press the button 12 under the push of the push spring 4. The motor 14 will be started when the button 12 is pressed and the sensor 11 detects that the gas pressure in the input pipe 2 is relatively high, so that the closing rotating plate 15 closes the internal channel of the input pipe 2.

[0027] The mounting base 7 has a motor 14 fixedly connected inside. The motor 14 can drive the closing rotating plate 15. The driving end of the motor 14 is fixedly connected to the closing rotating plate 15. The closing rotating plate 15 can close the gas passage in the input pipe 2. The outer side of the closing rotating plate 15 is rotatably connected to the inside of the input pipe 2.

[0028] Example 3 In this third embodiment, the other structures remain unchanged. The difference from the first embodiment is that an alarm light 16 is fixedly connected to the top of the valve body 1. When a rupture is detected in the diaphragm 5, the alarm light 16 emits a glaring red light. An alarm sounder 17 is also fixedly connected to the top of the valve body 1. When a rupture is detected in the diaphragm 5, the alarm sounder 17 emits a piercing alarm. The alarm light 16 and the alarm sounder 17 work together to alert the user to the rupture of the diaphragm 5. The alarm light 16 integrated at the top of the valve body 1 uses a high-brightness LED array with a high flashing frequency and a visibility distance of ≥50 meters. The alarm sounder 17 uses a piezoelectric ceramic buzzer with a sound pressure level of 85dB and a sharp alarm sound at a frequency of 1000Hz. When the controller 804 detects a rupture signal in the diaphragm 5, or when the motor 14 receives a cut-off command, the alarm light 16 is triggered synchronously. Together with the alarm 17, it provides dual audible and visual warnings to remind users and maintenance personnel to handle abnormal situations in a timely manner. Through the innovative design of pressure regulation and multiple safety protection structures, it constructs a complete safety system of "dynamic pressure regulation - real-time monitoring - graded cut-off - audible and visual early warning", effectively solving the safety hazards caused by the rupture of the existing pressure regulating valve diaphragm 5, and greatly improving the reliability and safety of the gas transmission system. It is suitable for gas pressure regulation needs in various scenarios such as home, commercial and industrial settings.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure regulating valve, comprising a valve body, characterized in that: An input pipe is fixedly connected to the left side of the valve body, and a delivery pipe is fixedly connected to the right side of the valve body. A push spring is installed inside the valve body, and a diaphragm is fixedly connected to the bottom end of the push spring. A valve core is installed at the bottom end of the diaphragm. A mounting base is fixedly connected to the outside of the input pipe, and a safety closing mechanism for closing the input pipe channel is installed inside the mounting base.

2. The pressure regulating valve according to claim 1, characterized in that: The safety closing mechanism includes an electric push rod fixedly connected inside the mounting base, with a closing plate fixedly connected to the bottom end of the electric push rod, and the outer side of the closing plate slidably connected inside the input pipe.

3. The pressure regulating valve according to claim 2, characterized in that: A drive rod is fixedly connected to the top of the diaphragm, and an opening controller is fixedly connected to the top of the mounting base. A control rod is slidably connected inside the opening controller, and the control rod is installed inside the drive rod.

4. The pressure regulating valve according to claim 3, characterized in that: The top end of the input tube is fixedly connected to an installation sleeve, and the top end of the inner part of the installation sleeve is fixedly connected to a conductive block.

5. The pressure regulating valve according to claim 4, characterized in that: The mounting sleeve has a sliding rod inside, and a conductive block 2 is fixedly connected to the top of the sliding rod.

6. The pressure regulating valve according to claim 5, characterized in that: A push plate is fixedly connected to the bottom end of the sliding rod, and the outer side of the push plate is slidably connected to the inside of the mounting sleeve. A push spring is sleeved on the outer side of the sliding rod.

7. The pressure regulating valve according to claim 1, characterized in that: A sensor is installed at the top of the input pipe, and a part of the sensor for sensing the gas pressure inside the input pipe is located inside the input pipe. A button is installed at the top of the inside of the valve body.

8. The pressure regulating valve according to claim 6, characterized in that: A motor is fixedly connected inside the mounting base, and a closed rotating plate is fixedly connected to the drive end of the motor. The outer side of the closed rotating plate is rotatably connected to the inside of the input tube.

9. The pressure regulating valve according to claim 1, characterized in that: An alarm light is fixedly connected to the top of the valve body, and an alarm sounder is fixedly connected to the top of the valve body.

10. The pressure regulating valve according to claim 1, characterized in that: An adjusting knob is installed at the top of the valve body, and an adjuster is installed at the bottom of the adjusting knob.

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