High-precision gas flow adjusting high-sealing gas valve
By using a combination of push rod rangefinder and ultrasonic rangefinder in gas regulating valves, the problems of inaccurate position detection and poor sealing in traditional gas regulating valves are solved, and high-precision gas flow regulation and high sealing are achieved ensures the safe and stable operation of the gas system.
Patent Information
- Application Number
- CN202421132990.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-23
AI Technical Summary
Traditional gas regulating valves have shortcomings in accurately detecting the valve core moving distance and maintaining high sealing, resulting in inaccurate control, poor sealing, and even threatening user safety.
A high-precision gas flow-regulated high-seal gas valve is designed, and the valve core position is accurately detected by combining a push rod rangefinder and an ultrasonic rangefinder, and the sealing and stability are improved through the airbag and shock-absorbing structure.
Accurate detection of the valve core movement distance is achieved, errors are reduced, high sealing is ensured, gas leakage and safety accidents are avoided, and control accuracy and stability of the gas system is improved.
Smart Images
Figure CN222229640U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas regulating valve devices, in particular to a high-precision gas flow regulating and high-sealing gas valve. Background Art
[0002] A gas regulating valve is a valve used to control the flow, pressure and temperature of gas. Its function is to achieve precise regulation of gas. Depending on different application requirements, the design and construction of the gas regulating valve are also different, but the basic principles are similar. A gas regulating valve is usually composed of an actuator and a valve body. The actuator is responsible for receiving control signals and driving the valve body to move. The valve body adjusts the flow, pressure and temperature of the gas according to the action of the actuator. During the operation of the gas regulating valve, changes in the control signal will cause changes in parameters such as the opening, angle or direction of the valve body, thereby achieving regulation of the gas. Gas regulating valves are widely used in gas transmission and distribution, combustion control and other fields. They are an important part of the gas system. By reasonably selecting and configuring gas regulating valves, precise control of the gas can be achieved to ensure the safe, stable and efficient operation of the gas system.
[0003] In traditional gas regulating valves, the limit module on the push rod can only observe the displacement change of the push rod, and can only be observed by manual visual inspection, with poor accuracy. At the same time, because there is still a certain distance between the push rod and the valve stem and the valve core, during use, although the wear increases and the gap between the connections changes, the push rod movement distance displayed will not match the valve core, resulting in the valve opening being too large or too small during control, resulting in poor user experience and even threatening the user's life safety. Therefore, it is necessary to accurately measure it. In addition, with long-term use, dirt may accumulate between the valve core and the valve seat in the valve body, resulting in it not being able to be completely sealed and insufficient overall sealing. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies in the prior art, the utility model provides a high-precision gas flow regulating high-sealing gas valve, which has the advantages of accurately detecting the movement distance of the valve core and having high sealing performance, thereby solving the problems of sealing performance and the inability to detect the precise position of the valve core.
[0006] (II) Technical solution
[0007] In order to achieve the above-mentioned purpose of accurately detecting the moving distance of the valve core and having high sealing performance, the utility model provides the following technical solutions: a high-precision gas flow regulating and high-sealing gas valve, including a regulating valve composed of a valve body, a valve core, a valve stem, a push rod, an air pump and a membrane cover, wherein the valve core is arranged in the valve body to divide the valve body into two chambers, one end of the valve core is connected to the valve stem and extends out of the valve body, passes through the sealing packing and then out of the valve body, and is connected to the push rod. When the valve stem moves up and down, the push rod makes the same movement. A mounting frame is provided on the push rod, and a push rod distance meter is provided on one side of the mounting frame. One end of the push rod distance meter is connected to the mounting frame, and the other end is connected to the push rod. The connection is movably connected on both sides, and the up and down displacement distance of the push rod is detected by the inclination degree of the push rod rangefinder itself. An air pump is provided on one side of the mounting frame, and the air pump is connected with the upper end of the diaphragm cover through the air valve port, and can extract and release air in the diaphragm cover. A diaphragm is provided in the diaphragm cover, and the diaphragm can move up and down in the diaphragm cover and divide the internal cavity into two parts, and a spring is provided under the diaphragm to connect with the bottom of the cavity. At the same time, one end of the push rod is connected to the bottom of the diaphragm, and an ultrasonic rangefinder is fixed in the valve body above the valve core, which can detect the valve core distance and compare it with the push rod movement distance detected by the push rod rangefinder to detect the specific position of the valve core.
[0008] Preferably, the push rod rangefinder is specifically a closed tubular cavity, an infrared transmitter is provided in the middle of one side of the mounting frame, an infrared receiver is provided on one side of the push rod, and half of the cavity is filled with light-transmitting liquid inside the push rod rangefinder.
[0009] Preferably, the liquid filled in the push rod rangefinder is isopropyl alcohol, which is a colorless, transparent, easy-flowing liquid with low vapor pressure and high refractive index. Its refractive index is similar to that of water and it is not easy to evaporate, so that the liquid in the push rod rangefinder can maintain the same liquid level, avoiding errors in the detection results caused by the lowering of the liquid level.
[0010] Preferably, an air bag is provided above the sealing packing, the air bag is not filled with gas, and an inclined surface is provided above the contact point between the valve body and the sealing packing.
[0011] Preferably, a shock absorbing structure or a vibration absorbing component is provided at the connection between the two ends of the valve body and the pipeline, and a rubber shock absorbing joint or a spring shock absorber is used to absorb the vibration caused by the ultrasonic wave emitted by the ultrasonic rangefinder 32, so that the pipeline connection is more stable.
[0012] (III) Beneficial effects
[0013] Compared with the prior art, the utility model provides a high-precision gas flow regulating high-sealing gas valve, which has the following beneficial effects:
[0014] 1. The high-precision gas flow regulating high-sealing gas valve uses a push rod rangefinder. An infrared transmitter is provided in the middle of one side of the push rod rangefinder, and an infrared receiver is provided on the other side. Half of the liquid is provided inside. When the whole is parallel, the infrared ray is horizontally irradiated on the infrared receiver. When the push rod rangefinder is tilted due to the movement of the push rod, the internal liquid is affected by gravity and the liquid level is always parallel to the horizontal plane, so that the infrared transmitter penetrates into or out of the liquid to emit refraction. Through the offset generated in the infrared receiver, the distance that the push rod drives the valve stem and the valve core to move upward is calculated. In addition, an ultrasonic rangefinder is provided above the valve core. The upward movement distance of the valve core can be detected by the reflection of sound waves. By comparing the data detected by the ultrasonic rangefinder and the push rod rangefinder, the specific situation of the valve core is detected, which can effectively reduce errors and make the results more accurate. If the equipment is damaged or interfered with, the difference between the two can be used to preliminarily infer the problem. When the valve core is closed, it can also be inferred whether it is tightly closed to ensure the sealing.
[0015] 2. This high-precision gas flow regulating high-sealing gas valve uses an ultrasonic rangefinder. When the valve core is closed, the ultrasonic wave emitted by the ultrasonic rangefinder can drive the valve core to vibrate slightly. The slight vibration can effectively remove sticky substances and impurities on the valve core of the gas regulating valve, keep it clean and work normally, make the valve core more sealed, and avoid the situation where the valve core cannot be completely closed.
[0016] 3. The high-precision gas flow regulating and highly sealed gas valve is provided with an airbag above the sealing packing. The gas inside the airbag is not filled, and an inclined surface is provided above the contact point between the valve body and the sealing packing. Because the gas inside the airbag is not filled, the airbag can be stuck into the inclined surface when the valve stem moves upward. During the upward movement, the overall sealing is made higher through the deformation of the airbag, thereby avoiding dangerous accidents caused by gas leakage. At the same time, the greater the upward movement, the greater the resistance, which can also avoid the valve core from moving too far upward, resulting in a large amount of gas passing through at one time, which puts the user in danger. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 It is a parallel schematic diagram of the push rod rangefinder of the utility model;
[0019] Figure 3 This is a schematic diagram of the tilt of the push rod rangefinder of the utility model;
[0020] Figure 4 This is a schematic diagram of the position of the airbag of the utility model.
[0021] In the figure: 1. valve body; 2. valve core; 3. valve stem; 4. push rod; 5. air pump; 6. membrane cover; 31. sealing packing; 32. ultrasonic rangefinder; 41. push rod rangefinder; 51. air valve port; 61. diaphragm; 311. air bag; 411. infrared transmitter; 412. infrared receiver. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] See also Figure 1 A high-precision gas flow regulating high-seal gas valve comprises a regulating valve consisting of a valve body 1, a valve core 2, a valve stem 3, a push rod 4, an air pump 5 and a membrane cover 6. The valve core 2 is arranged in the valve body 1 to divide the valve body 1 into two chambers. One end of the valve core 2 is connected to the valve stem 3 and extends out of the valve body 1, passes through the sealing packing 31 and then passes through the valve body 1, and is connected to the push rod 4. When the valve stem 3 moves up and down, the push rod 4 makes the same movement. A mounting frame is provided on the push rod 4, and a push rod distance meter 41 is provided on one side of the mounting frame. One end of the push rod distance meter 41 is connected to the mounting frame, and the other end is connected to the push rod 4. Both sides are movably connected and are connected through the push rod distance meter 4. 1 detects the up and down displacement distance of the push rod 4 according to its own inclination degree. An air pump 5 is provided on one side of the mounting frame. The air pump 5 is connected with the upper end of the membrane cover 6 through the air valve port 51, and can pump and release air in the membrane cover 6. A diaphragm 61 is provided in the membrane cover 6. The diaphragm 61 can move up and down in the membrane cover 6 and divide the internal cavity into two parts, an upper and lower part, and a spring is provided below the diaphragm 61 to connect with the bottom of the cavity. At the same time, one end of the push rod 4 is connected below the diaphragm 61. An ultrasonic rangefinder 32 is fixed in the valve body 1 above the valve core 2, which can detect the distance of the valve core 2 and compare it with the moving distance of the push rod 4 detected by the push rod rangefinder 41 to detect the specific position of the valve core 2.
[0024] Furthermore, the gas is introduced into the cavity below the valve body 1, the gas valve port 51 is opened, and the gas in the cavity above the diaphragm 61 in the diaphragm cover 6 is pumped out through the air pump 5, so that it is in a low-pressure state, and the diaphragm 61 moves upward, driving the push rod 4 to move upward, so that the valve stem 3 drives the valve core 2 to move upward, so that the gas can pass into the next cavity, and the displacement distance of the push rod 4 is calculated by using the push rod distance meter 41 and the change in the inclination of the push rod distance meter 41, and then the data detected by the ultrasonic distance meter 32 and the push rod distance meter 41 are used for calculation. By comparison, detecting the specific situation of the valve core 2 can effectively reduce errors and make the results more accurate. If the equipment is damaged or interfered by objects, the problem can be preliminarily inferred by the difference between the two. When the valve core 2 is closed, it can also be inferred whether it is tightly closed to ensure the sealing. When the valve core 2 needs to be closed, the air valve port 51 is opened, and the air pump 5 rushes gas into the cavity above the diaphragm 61, so that the diaphragm 61 drives the push rod 4 to move downward, which is transmitted to the valve stem 3 to drive the valve core 2 to move downward to close the passage in the valve body 1.
[0025] The push rod rangefinder 41 is specifically a closed tubular cavity, with an infrared transmitter 411 disposed on one side of the mounting frame, an infrared receiver 412 disposed in the middle of one side of the push rod 4, and a light-transmitting liquid is filled in the push rod rangefinder 41 to fill half of the cavity. When the whole is parallel, infrared rays are horizontally irradiated on the infrared receiver 412. Figure 2 When the push rod rangefinder 41 tilts due to the movement of the push rod 4, the liquid level inside is always parallel to the horizontal plane due to the influence of gravity, so that the infrared transmitter 411 penetrates into or out of the liquid to emit refraction, see Figure 3 The offset produced in the infrared receiver 412 is used to infer the distance that the push rod 4 drives the valve stem 3 and the valve core 2 to move upward. In addition, an ultrasonic rangefinder 32 is provided above the valve core 2, which can detect the upward movement distance of the valve core 2 through the reflection of sound waves.
[0026] The liquid filled in the push rod rangefinder 41 is isopropyl alcohol, which is a colorless, transparent, easy-flowing liquid with low vapor pressure and high refractive index. Its refractive index is similar to that of water and it is not easy to evaporate, so that the liquid in the push rod rangefinder 41 can maintain the same liquid level, avoiding errors in the detection results caused by the lowering of the liquid level.
[0027] An airbag 311 is provided above the sealing packing 31. The gas inside the airbag 311 is not filled, and an inclined surface is provided above the contact point between the valve body 1 and the sealing packing 31. Because the gas inside the airbag 311 is not filled, when the valve stem 3 moves upward, the airbag 311 can be stuck into the inclined surface. During the upward movement, the deformation of the airbag 311 makes the overall sealing higher, avoiding dangerous accidents caused by gas leakage. At the same time, the greater the upward movement, the greater the resistance, which can also avoid the valve core 2 from moving too far upward, resulting in a large amount of gas passing through at one time, which puts the user in danger.
[0028] Shock absorbing structures or vibration absorbing components are provided at the connection points between the two ends of the valve body 1 and the pipeline, and rubber shock absorbing joints or spring shock absorbers are used to absorb the vibration caused by the ultrasonic waves emitted by the ultrasonic rangefinder 32, so that the pipeline connection is more stable.
[0029] Working principle: The gas is introduced into the cavity below the valve body 1, the gas valve port 51 is opened, and the gas in the cavity above the diaphragm 61 in the membrane cover 6 is pumped out through the air pump 5, so that it is in a low-pressure state. The diaphragm 61 moves upward, driving the push rod 4 to move upward, so that the valve stem 3 drives the valve core 2 to move upward, so that the gas can pass into the next cavity. Using the push rod rangefinder 41, an infrared transmitter 411 is provided in the middle of one side of the push rod rangefinder 41, and an infrared receiver 412 is provided on the other side, and half of the liquid is provided inside. When the whole is parallel, the infrared ray is horizontally irradiated on the infrared receiver 412, refer to Figure 2 When the push rod rangefinder 41 tilts due to the movement of the push rod 4, the liquid level inside is always parallel to the horizontal plane due to the influence of gravity, so that the infrared transmitter 411 penetrates into or out of the liquid to emit refraction, see Figure 3 , through the offset generated in the infrared receiver 412, the distance that the push rod 4 drives the valve stem 3 and the valve core 2 to move upward can be calculated, and an ultrasonic rangefinder 32 is provided above the valve core 2. The upward movement distance of the valve core 2 can be detected by the reflection of sound waves. By comparing the data detected by the ultrasonic rangefinder 32 and the push rod rangefinder 41, the specific situation of the valve core 2 is detected, which can effectively reduce the error and make the result more accurate. If there is damage or interference in the equipment, the problem can be preliminarily inferred by the difference between the two. When the valve core 2 is closed, it can also be inferred whether it is tightly closed to ensure the sealing. When the valve core 2 needs to be closed, the air valve port 51 is opened, and the air pump 5 rushes gas into the cavity above the diaphragm 61, so that the diaphragm 61 drives the push rod 4 to move downward, which is transmitted to the valve stem 3 to drive the valve core 2 to move downward to close the passage in the valve body 1.
[0030] It should be noted that, in this article, relational terms such as first and second, 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 "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-precision gas flow regulating and highly sealed gas valve, comprising a regulating valve composed of a valve body (1), a valve core (2), a valve stem (3), a push rod (4), an air pump (5) and a membrane cover (6), characterized in that: The valve core (2) is arranged in the valve body (1) to divide the valve body (1) into two chambers. One end of the valve core (2) is connected to the valve stem (3) and extends to the outside of the valve body (1), passes through the sealing packing (31) and then passes through the valve body (1) and is connected to the push rod (4). When the valve stem (3) moves up and down, the push rod (4) moves in the same manner. A mounting frame is provided on the push rod (4), and a push rod distance meter (41) is provided on one side of the mounting frame. One end of the push rod distance meter (41) is connected to the mounting frame, and the other end is connected to the push rod (4). Both sides are movably connected, and the up and down displacement distance of the push rod (4) is detected by the inclination degree of the push rod distance meter (41) itself. One side of the mounting frame is provided An air pump (5) is connected to the upper end of the membrane cover (6) through an air valve port (51) and is capable of pumping and releasing air from the membrane cover (6). A diaphragm (61) is provided in the membrane cover (6). The diaphragm (61) is capable of moving up and down in the membrane cover (6) and dividing the internal cavity into two parts, an upper and a lower part. A spring is provided below the diaphragm (61) and is connected to the bottom of the cavity. At the same time, one end of a push rod (4) is connected below the diaphragm (61). An ultrasonic rangefinder (32) is fixed in the valve body (1) above the valve core (2) and is capable of detecting the distance of the valve core (2) and comparing it with the moving distance of the push rod (4) detected by the push rod rangefinder (41) to detect the specific lifting height of the valve core (2).
2. The high-precision gas flow regulating high-sealing gas valve according to claim 1 is characterized in that: The push rod distance meter (41) is specifically a closed tubular cavity, in which an infrared transmitter (411) is provided on one side of the mounting frame, an infrared receiver (412) is provided in the middle of one side of the push rod (4), and the interior of the push rod distance meter (41) is filled with a light-transmitting liquid that takes up half of the cavity.
3. The high-precision gas flow regulating high-sealing gas valve according to claim 2 is characterized in that: The liquid filled in the push rod rangefinder (41) is isopropyl alcohol.
4. The high-precision gas flow regulating high-sealing gas valve according to claim 1 is characterized in that: An air bag (311) is provided above the sealing packing (31), the air bag (311) is not filled with gas, and an inclined surface is provided above the contact point between the valve body (1) and the sealing packing (31).
5. The high-precision gas flow regulating and high-sealing gas valve according to claim 1 is characterized in that: Shock-absorbing structures or vibration-absorbing components are provided at the connection points between the two ends of the valve body (1) and the pipeline.