Proportional flow area valve

Abstract

The invention discloses a proportional flow area valve which comprises a valve cover, a valve body, a pressure regulating mechanism, a cut-off mechanism, a cut-off mechanism and a flow regulating mechanism, a diaphragm cavity is formed between the valve body and the valve cover, a diaphragm assembly is installed in the diaphragm cavity and divides the diaphragm cavity into a diaphragm upper cavity and a diaphragm lower cavity, and the diaphragm upper cavity is communicated with the diaphragm lower cavity. A pressure regulating cavity communicated with the lower diaphragm cavity is formed in the valve body, a gas inlet cavity communicated with the pressure regulating cavity is formed in one end in the valve body, a gas inlet communicated with the gas inlet cavity is formed in the valve body, the pressure regulating mechanism is installed in the pressure regulating cavity, the cut-off mechanism is installed in the gas inlet cavity in a sliding mode, and the cut-off mechanism is installed at the end, located in the gas inlet cavity, of the valve body. The flow adjusting mechanism is installed at the end, away from the cut-off mechanism, of the valve body, and a fuel gas outlet communicating with the pressure adjusting cavity is formed in the flow adjusting mechanism. The purpose of accurately controlling the gas flow can be achieved, stable pressure gas is provided, and the service life is long.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a proportional flow area valve. Background Art

[0002] The engine gas supply technologies currently used in the market include two methods: proportional mixer and mechanical pressure regulator. The proportional mixer technology is to reduce the pressure of high-pressure gas stored in the gas cylinder to the working pressure, and then the proportional mixer mixes the natural gas and air in a predetermined ratio before entering the cylinder for combustion. The mechanical pressure regulator technology is to reduce the pressure of high-pressure gas and supply it to the gas nozzle, which sprays the gas into the intake pipe to mix with the air and then enters the cylinder for combustion.

[0003] The gas flow of a traditional proportional mixer is determined by the valve core profile. The amount of gas flow depends on the design and processing level of the valve core. The proportional mixer is a completely mechanical component and cannot be adjusted based on the actual effect of the gas supply. Once the valve core is worn or a leak occurs in the pipeline, the gas flow will have a directional deviation and cannot be corrected, resulting in the inability to accurately control the gas flow.

[0004] A technical solution that uses a mechanical pressure regulator to reduce the pressure of high-pressure gas and then supply it to the gas nozzle. The fuel sprayed from the nozzle is pulsating, which will cause cyclic fluctuations in the air-fuel ratio. The nozzle can only adjust the flow rate by changing the opening time or more complex methods. As the number of times the nozzle is opened and closed increases, the wear of the nozzle will increase, and its service life will be affected. In addition, the mechanical pressure regulator generally cannot cut off the gas supply, and a separate shut-off valve needs to be installed in its upstream pipeline.

[0005] Therefore, the applicant proposes a proportional flow area valve to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, an object of the present invention is to provide a proportional flow area valve.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A proportional flow area valve, comprising: Valve cover; A valve body, a diaphragm cavity is formed between the valve body and the valve cover, a diaphragm assembly is installed in the diaphragm cavity, the diaphragm assembly divides the diaphragm cavity into an upper diaphragm cavity and a lower diaphragm cavity, a pressure regulating cavity connected to the lower diaphragm cavity is provided in the valve body, an air inlet cavity connected to the pressure regulating cavity is opened at one end of the valve body, and a gas inlet connected to the air inlet cavity is installed on the valve body; A pressure regulating mechanism, which is installed in the pressure regulating cavity and is used to achieve throttling and pressure reduction of the gas; A cut-off mechanism, wherein the cut-off mechanism is slidably mounted in the air inlet cavity, and a cut-off spring cavity is provided on one end of the cut-off mechanism away from the pressure regulating cavity; A cut-off mechanism, wherein the cut-off mechanism is installed on one end of the valve body located at the air inlet cavity; wherein, when the cut-off mechanism is powered off, the gas inlet is connected to the cut-off spring cavity, and the cut-off spring cavity is not connected to the lower cavity of the diaphragm; and when the cut-off mechanism is powered on, the gas inlet is not connected to the cut-off spring cavity, and the cut-off spring cavity is connected to the lower cavity of the diaphragm; The flow regulating mechanism is used to control the gas flow. The flow regulating mechanism is installed on one end of the valve body away from the cutting mechanism. The flow regulating mechanism is provided with a gas outlet connected with the pressure regulating cavity.

[0008] Furthermore, an upper protective cover is installed on one end of the valve cover away from the valve body, and a lower protective cover is installed on one end of the valve body away from the valve cover.

[0009] Furthermore, the voltage regulating mechanism comprises: A pressure regulating valve core, the pressure regulating valve core is located in the pressure regulating cavity and is slidably connected to the lower protective cover; A pressure regulating valve seat, which is arranged in the pressure regulating cavity and can be sealed with the pressure regulating valve core, a pressure regulating valve opening is formed between the pressure regulating valve core and the pressure regulating valve seat, and the pressure regulating valve seat divides the pressure regulating cavity into a pressure regulating front cavity and a pressure regulating rear cavity, and the pressure regulating front cavity can be communicated with the air inlet cavity; A first pressure regulating spring, wherein the first pressure regulating spring is sleeved on the outside of the pressure regulating valve core, one end of the first pressure regulating spring is connected to the pressure regulating valve core, and the other end of the first pressure regulating spring is in contact with the inner wall of the lower protective cover; A pressure regulating valve stem is connected to the pressure regulating valve core, and the pressure regulating valve stem extends into the lower cavity of the diaphragm and abuts against the diaphragm assembly.

[0010] Furthermore, the voltage regulating mechanism further comprises: An adjusting screw, wherein the adjusting screw is threadably mounted on the valve cover; A spring seat, wherein the spring seat is slidably mounted in the upper cavity of the diaphragm, and one end of the adjusting screw extending into the upper cavity of the diaphragm is connected to the spring seat; A second pressure regulating spring, one end of which is in contact with the spring seat, and the other end of which is connected with the diaphragm assembly.

[0011] Furthermore, the cut-off mechanism comprises: A stop valve core, the stop valve core is slidably installed in the air inlet cavity, and a stop spring cavity is provided on one end of the stop valve core away from the pressure regulating cavity; A stop valve seat, which is arranged in the pressure regulating cavity and can be sealed with the stop valve core, and a stop valve opening is formed between the stop valve core and the stop valve seat; A cut-off spring is installed in the cut-off spring cavity, one end of the cut-off spring is connected to the inner wall of the cut-off spring cavity, and the other end of the cut-off spring is in contact with the cutting mechanism.

[0012] Furthermore, the cutting mechanism comprises: A cut-off housing, the cut-off housing being mounted on one end of the valve body located at the air inlet cavity; A frame installed in the cutting shell; A cut-off coil, wherein the cut-off coil is wound outside the frame; A cut-off moving iron core, wherein the cut-off moving iron core is slidably installed in the frame; A cut-off valve seat, which is arranged in the frame and can be sealed with the cut-off moving iron core, and a cut-off valve opening is formed between the cut-off moving iron core and the cut-off valve seat; A cut-off air inlet, which is opened at one end of the cut-off housing and penetrates the cut-off valve seat, is communicated with the gas inlet, and the cut-off moving iron core can seal the cut-off air inlet, and can be communicated with the cut-off spring chamber through the cut-off valve opening; A cut-off spring, wherein the cut-off spring is sleeved on the outside of the cut-off movable iron core and the cut-off valve seat, one end of the cut-off spring is connected to the cut-off movable iron core, and the other end of the cut-off spring is connected to the cut-off valve seat; A cut-off air supply chamber, the cut-off air supply chamber is provided on an end of the cut-off housing away from the cut-off air inlet, the cut-off air supply chamber can be communicated with the cut-off air inlet through the cut-off valve opening, and the cut-off air supply chamber is communicated with the cut-off spring chamber; A movable block is slidably installed in the cut-off air supply cavity, and the movable block is connected to the cut-off moving iron core. A connecting cavity is opened on the side of the movable block away from the cut-off moving iron core, and the connecting cavity is connected to the lower cavity of the diaphragm, wherein when the cut-off coil is energized, the connecting cavity is connected to the cut-off air supply cavity.

[0013] Furthermore, the flow regulating mechanism comprises: An installation shell, the installation shell is installed on an end of the valve body away from the cut-off mechanism, and a gas outlet is installed on an end of the installation shell close to the valve body; A nozzle, the nozzle is installed on one end of the mounting shell close to the valve body, and the inner cavity of the nozzle is connected with the pressure regulating rear cavity; An air outlet cavity is formed between the outside of the nozzle and the mounting shell, the air outlet cavity is communicated with the gas outlet, and the air outlet cavity is communicated with the upper cavity of the diaphragm; A flow regulating port, the flow regulating port is opened on the outer circumferential wall of the nozzle, and a plurality of the flow regulating ports are provided, which can connect the inner cavity of the nozzle with the air outlet cavity; A mandrel, the mandrel being slidably disposed in the nozzle; A linear motor is installed on one end of the installation shell away from the valve body, and a moving rod of the linear motor is connected to the core shaft.

[0014] Furthermore, a controller for controlling the linear motor is installed on the installation housing.

[0015] Furthermore, a bottom cavity is opened in the lower protective cover, the pressure regulating valve core slides in the bottom cavity, and the pressure regulating valve core is slidably connected to the bottom cavity, and the bottom cavity is communicated with the pressure regulating front cavity.

[0016] Furthermore, the cross-sectional shape of the flow regulating port is Y-shaped.

[0017] Compared with the prior art, the present invention provides a proportional flow area valve, which has the following beneficial effects: 1. When the present invention is not powered on, the high-pressure gas enters the air inlet cavity and the cut-off spring cavity through the gas inlet, and the air inlet cavity and the pressure regulating cavity are disconnected through the cut-off mechanism, and the present device does not work at this time; when the present device is powered on and working, the cut-off mechanism disconnects the gas inlet from the cut-off spring cavity, and the cut-off spring cavity is connected to the lower cavity of the diaphragm, and the high-pressure gas in the cut-off spring cavity enters the lower cavity of the diaphragm, and then enters the pressure regulating cavity, so that the gas pressure in the pressure regulating cavity increases, and the cut-off mechanism is pushed to connect the air inlet cavity and the pressure regulating cavity, so that the high-pressure gas in the air inlet cavity enters the pressure regulating cavity, and the energy-saving and pressure-reducing of the pressure regulating mechanism are realized. The high-pressure gas is converted into low-pressure gas, and the gas flow is controlled by the flow regulating mechanism so that the low-pressure gas is discharged from the gas outlet; after the high-pressure gas is reduced in pressure by the energy-saving pressure regulating mechanism, the low-pressure gas can enter the lower cavity of the diaphragm and push the diaphragm assembly, thereby adjusting the pressure regulating mechanism until the upper cavity of the diaphragm and the lower cavity of the diaphragm reach a pressure balance state. When the flow regulating mechanism adjusts the size of the gas flow, the pressure regulating mechanism will automatically adjust until the upper cavity of the diaphragm and the lower cavity of the diaphragm reach a pressure balance state again, so that the device can achieve the purpose of accurately controlling the gas flow and provide stable pressure gas.

[0018] 2. The present invention specially designs the flow regulating port. When the linear motor drives the core shaft to move, the flow regulating port is opened, so that the gas flow can flow continuously when the engine is working. The linear motor is controlled by a controller, so that the linear motor drives the core shaft to move to change the area of ​​the flow regulating port, and then the outflow area of ​​the gas is controlled, so as to achieve the purpose of controlling the gas flow. When the engine is working, the flow regulating port is always open and will not be completely closed. Only when the engine is not working, the flow regulating port is completely closed, which reduces the wear of the nozzle and increases the service life of the device.

[0019] 3. The present invention realizes all functions of cutting off, pressure regulating and flow regulating by integrating the cutting mechanism, pressure regulating mechanism and flow regulating mechanism into one, and can automatically adjust the working parameters in real time, thereby realizing the functions of pressure regulating and gas supply.

[0020] 4. The present invention is a reliable mechanical pressure reducing device that can provide stable pressure gas. The present invention has a lower failure rate than an electrically controlled pressure reducing device and is easier to manufacture, install and implement. The flow regulating mechanism achieves a change in the gas flow area by changing the area of ​​a specially designed flow regulating port, which is more linear than other controls. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view cross-sectional structural schematic diagram of a proportional flow area valve of the present invention; Figure 2 It is a front view structural schematic diagram of a proportional flow area valve of the present invention; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 It is a three-dimensional structural schematic diagram of a proportional flow area valve of the present invention; Figure 5 It is a left-side cross-sectional structural schematic diagram of the cutting mechanism of the present invention.

[0022] Markings in the figure: 1. Valve cover; 2. Valve body; 3. Diaphragm assembly; 4. Diaphragm upper cavity; 5. Diaphragm lower cavity; 6. Pressure regulating mechanism; 61. Pressure regulating valve core; 62. Pressure regulating valve seat; 63. First pressure regulating spring; 64. Pressure regulating valve stem; 65. Adjusting screw; 66. Spring seat; 67. Second pressure regulating spring; 7. Air inlet cavity; 8. Cut-off mechanism; 81. Cut-off valve core; 82. Cut-off valve seat; 83. Cut-off spring; 9. Cut-off spring cavity; 10. Cut-off mechanism; 101. Cut-off housing; 102. Frame; 103. Cut-off coil; 104. Cut-off moving iron core; 105. Cut off valve seat; 106, cut off air inlet; 107, cut off spring; 108, cut off air supply chamber; 109, movable block; 110, connecting chamber; 11, flow regulating mechanism; 111, installation shell; 112, nozzle; 113, air outlet chamber; 114, flow regulating port; 115, core shaft; 116, linear motor; 12, gas inlet; 13, gas outlet; 14, upper protective cover; 15, lower protective cover; 16, pressure regulating front chamber; 17, pressure regulating rear chamber; 18, through hole; 19, bottom chamber; 20, controller; 21, cut off joint; 22, temperature and pressure sensor. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0024] 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.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

[0026] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0027] The embodiment of the present invention provides a proportional flow area valve, referring to Figures 1 to 5, comprising: a valve cover 1, a valve body 2, a pressure regulating mechanism 6, a shut-off mechanism 8, a cut-off mechanism 10 and a flow regulating mechanism 11, a diaphragm cavity is formed between the valve body 2 and the valve cover 1, a diaphragm assembly 3 is installed in the diaphragm cavity, the diaphragm assembly 3 divides the diaphragm cavity into a diaphragm upper cavity 4 and a diaphragm lower cavity 5, a pressure regulating cavity connected to the diaphragm lower cavity 5 is provided in the valve body 2, an air inlet cavity 7 connected to the pressure regulating cavity is opened at one end of the valve body 2, a gas inlet 12 connected to the air inlet cavity 7 is installed on the valve body 2, the pressure regulating mechanism 6 is installed in the pressure regulating cavity, and is used to realize throttling and decompression of the gas, and the shut-off mechanism 8 is slidably installed in the air inlet cavity 7 A cut-off spring chamber 9 is provided on the end of the cut-off mechanism 8 away from the pressure regulating cavity, and the cut-off mechanism 10 is installed on one end of the valve body 2 located at the air inlet chamber 7; wherein, when the cut-off mechanism 10 is powered off, the gas inlet 12 is communicated with the cut-off spring chamber 9, and the cut-off spring chamber 9 is not communicated with the lower chamber 5 of the diaphragm; when the cut-off mechanism 10 is powered on, the gas inlet 12 is not communicated with the cut-off spring chamber 9, and the cut-off spring chamber 9 is communicated with the lower chamber 5 of the diaphragm; a flow regulating mechanism 11 is used to control the gas flow, and the flow regulating mechanism 11 is installed on the end of the valve body 2 away from the cut-off mechanism 10, and a gas outlet 13 communicated with the pressure regulating cavity is installed on the flow regulating mechanism 11.

[0028] Specifically, the valve cover 1 is installed on the valve body 2 by screws; the diaphragm assembly 3 includes a diaphragm, a mounting seat and a mounting rod, the edge of the diaphragm is clamped by the valve cover 1 and the valve body 2 to form a sealing structure, the diaphragm is installed with a mounting seat on one side of the diaphragm upper cavity 4, a mounting rod is installed in the middle of the diaphragm, the mounting rod is located in the diaphragm lower cavity 5, and the mounting rod passes through the diaphragm and the mounting seat to connect; a through hole 18 is opened on the valve body 2 to connect the diaphragm lower cavity 5 with the pressure regulating cavity; a cut-off mechanism 8 is provided to control the connection or closing of the air inlet cavity 7 with the pressure regulating cavity.

[0029] A cut-off connector 21 is installed on one side of the cut-off mechanism 10; a controller 20 is installed on the end of the flow regulating mechanism 11 away from the valve body 2, and a chip connector is installed on the controller 20; a temperature and pressure sensor 22 is installed on the valve body 2 for monitoring the temperature and pressure in the pressure regulating cavity; the cut-off connector 21, the chip connector and the temperature and pressure sensor 22 are all connected to the ECU (electronic control unit) through an external wiring harness, and the temperature and pressure sensor 22 feeds data back to the ECU, which processes the data and determines the working status of the valve, and transmits new commands to the cut-off connector 21 and the chip connector. The cut-off connector 21 and the chip connector receive the commands and execute them, thereby achieving overall control of the valve, thereby controlling the supply of gas flow and realizing the closed-loop control capability of the supply system.

[0030] Reference Figures 1 to 4In this embodiment, an upper protective cover 14 is installed on the end of the valve cover 1 away from the valve body 2, and a lower protective cover 15 is installed on the end of the valve body 2 away from the valve cover 1.

[0031] Specifically, the upper protective cover 14 is threadedly sealed to the valve cover 1 ; and the lower protective cover 15 is threadedly sealed to the valve body 2 .

[0032] Reference Figure 1 In this embodiment, the pressure regulating mechanism 6 includes: a pressure regulating valve core 61, a pressure regulating valve seat 62, a first pressure regulating spring 63 and a pressure regulating valve stem 64. The pressure regulating valve core 61 is located in the pressure regulating cavity and is slidably connected to the lower protective cover 15. The pressure regulating valve seat 62 is arranged in the pressure regulating cavity and can be sealed with the pressure regulating valve core 61. A pressure regulating valve opening is formed between the pressure regulating valve core 61 and the pressure regulating valve seat 62. The pressure regulating valve seat 62 separates the pressure regulating cavity. It is a pressure-regulating front chamber 16 and a pressure-regulating rear chamber 17, the pressure-regulating front chamber 16 can be connected with the air inlet chamber 7, the first pressure-regulating spring 63 is sleeved on the outside of the pressure-regulating valve core 61, one end of the first pressure-regulating spring 63 is connected to the pressure-regulating valve core 61, the other end of the first pressure-regulating spring 63 abuts against the inner wall of the lower protective cover 15, the pressure-regulating valve stem 64 is connected to the pressure-regulating valve core 61, and the pressure-regulating valve stem 64 extends into the diaphragm lower chamber 5 and abuts against the diaphragm assembly 3.

[0033] Specifically, the through hole 18 connects the lower chamber 5 of the diaphragm with the pressure-regulating rear chamber 17; the temperature and pressure sensor 22 is used to monitor the temperature and pressure in the pressure-regulating rear chamber 17; the cut-off mechanism 8 is used to control the connection or closing of the air inlet chamber 7 and the pressure-regulating front chamber 16; the pressure-regulating front chamber 16 is a high-pressure gas chamber, and the pressure-regulating rear chamber 17 is a low-pressure gas chamber; the upper part of the pressure-regulating valve stem 64 passes through the valve body 2, and the pressure-regulating valve stem 64 is slidingly connected to the valve body 2, the top of the pressure-regulating valve stem 64 abuts against the mounting rod of the diaphragm assembly 3, and the pressure-regulating valve stem 64 and the mounting rod are matched through a concave-convex structure for positioning therebetween, and the first pressure-regulating spring 63 provides an upward thrust to the pressure-regulating valve core 61, thereby applying an upward thrust to the pressure-regulating valve stem 64, so that the pressure-regulating valve stem 64 supports the mounting rod, thereby achieving abutment between the pressure-regulating valve stem 64 and the mounting rod.

[0034] Among them, refer to Figure 1 In this embodiment, a bottom cavity 19 is opened in the lower protective cover 15 , the pressure regulating valve core 61 is located in the bottom cavity 19 , and the pressure regulating valve core 61 slides in the bottom cavity 19 , and the bottom cavity 19 is connected with the pressure regulating front cavity 16 .

[0035] Specifically, the high-pressure gas can enter the bottom cavity 19 to assist in adjusting the opening of the pressure regulating valve, so that the diaphragm assembly 3 can reach a pressure balance state more quickly under the gas pressure.

[0036] Reference Figure 1In this embodiment, the pressure regulating mechanism 6 also includes: an adjusting screw 65, a spring seat 66 and a second pressure regulating spring 67, the adjusting screw 65 is threadedly installed on the valve cover 1, the spring seat 66 is slidably installed in the diaphragm upper cavity 4, one end of the adjusting screw 65 extending into the diaphragm upper cavity 4 is connected to the spring seat 66, one end of the second pressure regulating spring 67 is in contact with the spring seat 66, and the other end of the second pressure regulating spring 67 is connected to the diaphragm assembly 3.

[0037] Specifically, the adjusting end of the adjusting screw 65 is located in the upper protective cover 14 ; the other end of the second pressure regulating spring 67 is connected to the mounting seat of the diaphragm assembly 3 .

[0038] By opening the upper protective cover 14 and rotating the adjusting screw 65 to move the spring seat 66, the spring loading force of the second pressure regulating spring 67 can be increased or decreased, thereby increasing or decreasing the pressure regulating setting value.

[0039] When the device is powered off, under the spring loading force of the second pressure regulating spring 67 , there is a certain pressure regulating valve opening between the pressure regulating valve core 61 and the pressure regulating valve seat 62 .

[0040] By adjusting the size of the pressure regulating valve opening, the purpose of pressure reduction is achieved through throttling. When the high-pressure gas enters the pressure regulating front chamber 16 and is reduced in pressure through throttling of the pressure regulating valve opening, the gas enters the pressure regulating rear chamber 17. Part of the gas enters the diaphragm lower chamber 5 through the through hole 18. The gas pushes the diaphragm assembly 3 to overcome the elastic force of the second pressure regulating spring 67. After the force difference between the two reaches the set value, a pressure equilibrium state is reached. The pressure regulating valve core 61 moves under the elastic force of the first pressure regulating spring 63, thereby adjusting the size of the pressure regulating valve opening, thereby achieving the purpose of throttling and reducing pressure.

[0041] When the gas in the pressure-regulating rear chamber 17 is over-pressured, the gas in the diaphragm lower chamber 5 is also over-pressured, and the gas pushes the diaphragm assembly 3 to overcome the elastic force of the second pressure-regulating spring 67. The pressure-regulating valve core 61 moves under the elastic force of the first pressure-regulating spring 63, so that the opening of the pressure-regulating valve port becomes smaller and smaller until it is closed, thereby preventing the gas in the pressure-regulating front chamber 16 from continuing to enter the pressure-regulating rear chamber 17 through the pressure-regulating valve port opening, causing the gas pressure in the pressure-regulating rear chamber 17 to become larger and larger, thereby causing damage to the device.

[0042] Reference Figure 1 and Figure 3In this embodiment, the cut-off mechanism 8 includes: a cut-off valve core 81, a cut-off valve seat 82 and a cut-off spring 83. The cut-off valve core 81 is slidably installed in the air inlet cavity 7. A cut-off spring cavity 9 is opened on one end of the cut-off valve core 81 away from the pressure regulating cavity. The cut-off valve seat 82 is arranged in the pressure regulating cavity and can be sealed with the cut-off valve core 81. A cut-off valve port opening is formed between the cut-off valve core 81 and the cut-off valve seat 82. The cut-off spring 83 is installed in the cut-off spring cavity 9. One end of the cut-off spring 83 is connected to the inner wall of the cut-off spring cavity 9, and the other end of the cut-off spring 83 abuts against the cut-off mechanism 10.

[0043] Specifically, by turning the power on and off of the cut-off mechanism 10, the direction of the gas flow entering the cut-off mechanism 10 from the gas inlet 12 is changed, thereby controlling the movement of the stop valve core 81 to achieve the purpose of opening and closing the stop valve opening; When the device is powered off, the cut-off mechanism 10 is powered off, the cut-off spring chamber 9 is filled with high-pressure gas, and the cut-off valve core 81 is pushed to move under the combined action of the cut-off spring 83 and the high-pressure gas, so that the cut-off valve core 81 cooperates with the cut-off valve seat 82, closing the cut-off valve opening, so that the air inlet chamber 7 is disconnected from the pressure regulating front chamber 16; When the device is powered on, the shut-off mechanism 10 is powered on, and the high-pressure gas in the shut-off spring chamber 9 is discharged into the diaphragm lower chamber 5, and the high-pressure gas enters the pressure regulating rear chamber 17 through the through hole 18, and then enters the pressure regulating front chamber 16 through the pressure regulating valve opening, so that the gas pressure in the pressure regulating front chamber 16 increases, thereby overcoming the elastic force of the shut-off spring 83 to push the shut-off valve core 81 to move, open the shut-off valve opening, and make the air inlet chamber 7 and the pressure regulating front chamber 16 connected, so that the gas in the air inlet chamber 7 can enter the pressure regulating front chamber 16.

[0044] Reference Figure 5In this embodiment, the cutting mechanism 10 includes: a cutting shell 101, a frame 102, a cutting coil 103, a cutting moving iron core 104, a cutting valve seat 105, a cutting air inlet 106, a cutting spring 107, a cutting air supply cavity 108 and a movable block 109. The cutting shell 101 is installed on one end of the valve body 2 located at the air inlet cavity 7, the frame 102 is installed in the cutting shell 101, the cutting coil 103 is wound on the outside of the frame 102, and the cutting moving iron core The cut-off valve seat 105 is provided in the frame 102 and can be sealed with the cut-off moving iron core 104. A cut-off valve opening is formed between the cut-off moving iron core 104 and the cut-off valve seat 105. The cut-off air inlet 106 is provided at one end of the cut-off housing 101 and penetrates the cut-off valve seat 105. The cut-off air inlet 106 is connected to the gas inlet 12. The cut-off moving iron core 104 can seal the cut-off air inlet 106. 6 is sealed, the cut-off air inlet 106 can be communicated with the cut-off spring chamber 9 through the cut-off valve opening, the cut-off spring 107 is sleeved on the outside of the cut-off moving iron core 104 and the cut-off valve seat 105, one end of the cut-off spring 107 is connected to the cut-off moving iron core 104, and the other end of the cut-off spring 107 is connected to the cut-off valve seat 105, the cut-off air supply chamber 108 is opened on the end of the cut-off housing 101 away from the cut-off air inlet 106, and the cut-off air supply chamber 108 can It is connected with the cut-off air inlet 106 through the opening of the cut-off valve port, the cut-off air supply chamber 108 is connected with the cut-off spring chamber 9, the movable block 109 is slidably installed in the cut-off air supply chamber 108, and the movable block 109 is connected with the cut-off moving iron core 104, and a connecting chamber 110 is provided on the side of the movable block 109 away from the cut-off moving iron core 104, and the connecting chamber 110 is connected with the lower chamber 5 of the diaphragm, wherein, when the cut-off coil 103 is energized, the connecting chamber 110 is connected with the cut-off air supply chamber 108.

[0045] Specifically, the cut-off shell 101 is installed on one end of the valve body 2 by screws; a cut-off joint 21 is installed on the cut-off shell 101, and the cut-off joint 21 corresponds to the end of the cut-off moving iron core 104 close to the movable block 109; the cut-off spring chamber 9 corresponds to the position between the cut-off moving iron core 104 and the cut-off valve seat 105; a mounting cap is installed on the end of the cut-off moving iron core 104 close to the cut-off air inlet 106, and the mounting cap can seal the cut-off air inlet 106, and one end of the cut-off spring 107 is connected to the mounting cap; there is a gap between the cut-off moving iron core 104 and the skeleton 102 for gas to pass through; when the cut-off coil 103 is powered off, the gap between the cut-off air supply chamber 108 and the connecting chamber 110 is completely sealed under the thrust of the cut-off spring 107.

[0046] When the cut-off coil 103 is powered off, under the elastic force of the cut-off spring 107, a certain cut-off valve opening is formed between the cut-off moving iron core 104 and the cut-off valve seat 105. At the same time, the cut-off gas supply chamber 108 and the connecting chamber 110 are closed, and the high-pressure gas enters the cut-off gas supply chamber 108 and the cut-off spring chamber 9 through the cut-off gas inlet 106 and the cut-off valve opening. When the cut-off coil 103 is energized, an electromagnetic force is generated between the cut-off moving iron core 104 and the cut-off valve seat 105, and the cut-off moving iron core 104 overcomes the elastic force of the cut-off spring 107 and contacts the cut-off valve seat 105, closing the cut-off air inlet 106, and closing the cut-off valve opening. At the same time, the cut-off moving iron core 104 drives the movable block 109 to move in the cut-off air supply chamber 108, so that the cut-off air supply chamber 108 is connected with the connecting chamber 110, so that the high-pressure gas in the cut-off spring chamber 9 enters the diaphragm lower chamber 5 through the cut-off air supply chamber 108 and the connecting chamber 110 in turn.

[0047] Reference Figure 1 and Figure 3 In this embodiment, the flow regulating mechanism 11 includes: a mounting shell 111, a nozzle 112, an air outlet cavity 113, a flow regulating port 114, a core shaft 115 and a linear motor 116. The mounting shell 111 is mounted on the end of the valve body 2 away from the cutting mechanism 10, and the end of the mounting shell 111 close to the valve body 2 is equipped with a gas outlet 13. The nozzle 112 is mounted on the end of the mounting shell 111 close to the valve body 2, and the inner cavity of the nozzle 112 is connected to the pressure regulating rear cavity 17. The outer cavity of the nozzle 112 is connected to the mounting shell An air outlet cavity 113 is formed between the valve body 111, and the air outlet cavity 113 is communicated with the gas outlet 13, and the air outlet cavity 113 is communicated with the upper cavity 4 of the diaphragm. The flow regulating port 114 is opened on the outer circumferential wall of the nozzle 112, and a plurality of the flow regulating ports 114 are provided, which can connect the inner cavity of the nozzle 112 with the air outlet cavity 113. The core shaft 115 is slidably arranged in the nozzle 112, and the linear motor 116 is installed on one end of the mounting shell 111 away from the valve body 2, and the moving rod of the linear motor 116 is connected to the core shaft 115.

[0048] Specifically, the mounting shell 111 is mounted on one end of the valve body 2 by screws; the nozzle 112 is arranged in an annular shape; the air outlet cavity 113 is arranged in an annular shape; the air outlet cavity 113 is connected with the upper cavity 4 of the diaphragm, so that a pressure difference is maintained between the upper cavity 4 of the diaphragm and the lower cavity 5 of the diaphragm, thereby facilitating the device to control the size of the gas flow; the inner cavity of the nozzle 112 is connected with the air outlet cavity 113 through the flow regulating port 114; the linear motor 116 includes a coil, a mounting frame, a magnetic ring core, a moving rod, a spring and a position magnet, the coil is wound on the outside of the mounting frame, the magnetic ring core is slidably arranged in the mounting frame, the moving rod is interference-fitted on the magnetic ring core, the spring is sleeved on the outside of the moving rod, one end of the spring is connected to the magnetic ring core, and the other end of the spring is connected to the controller 20, the spring acts as a preload on the magnetic ring core, the position magnet is installed on the end of the moving rod away from the core shaft 115, and the position magnet is used to sense the movement of the moving rod; the linear motor 116 is an existing device, and its structure and principle are both existing technologies.

[0049] The core shaft 115 is driven to move by the linear motor 116 to open the flow regulating port 114 so that the gas flow can flow continuously when the engine is working.

[0050] Among them, refer to Figures 1 to 4 In this embodiment, a controller 20 for controlling the linear motor 116 is installed on the mounting housing 111 .

[0051] Specifically, the controller 20 is a PCBA module, including a shell, a Hall chip and a control chip. A chip connector is installed on the shell, and a Hall chip and a control chip are installed on the shell. The moving rod extends into the shell, and the other end of the spring is connected to the shell of the controller 20; the accurate positioning of the moving rod is achieved through the calibration of the position magnet and the Hall chip and the control of the control chip, thereby accurately controlling the moving position of the core shaft 115; the controller 20 is an existing device, and its structure and principle are both existing technologies.

[0052] The linear motor 116 is controlled by the controller 20 so that the linear motor 116 drives the core shaft 115 to move, thereby changing the area of ​​the flow regulating port 114 and further controlling the outflow area of ​​the gas, thereby achieving the purpose of controlling the gas flow.

[0053] Reference Figure 1 In this embodiment, the cross-sectional shape of the flow regulating port 114 is Y-shaped.

[0054] Specifically, the cross-sectional shape of the flow regulating port 114 includes but is not limited to a Y-shape, a circle, an ellipse, etc., and the number of the flow regulating ports 114 is preferably 1-3; the number and shape of the flow regulating ports 114 in the present invention are not limited to those described in the above embodiments, and different numbers and types of cross-sectional geometries can be used to achieve different linear flow characteristic curves.

[0055] The present invention adopts a special design that the cross-sectional shape of the flow regulating port 114 is designed to be Y-shaped to ensure that the opening of the flow regulating port 114 increases from small to large. The shape design of the flow regulating port 114 is met according to the working conditions and requirements of the engine, so that the area of ​​the flow regulating port 114 meets the requirements of the quadratic function, which is slow at first and then large. This is a special design; the shape of the flow regulating port 114 is determined according to the gas flow that needs to be met and the opening size of the flow regulating port 114; through this special design, when the engine is working, the flow regulating port 114 is always open and will not be completely closed. Only when the engine is not working, the flow regulating port 114 is completely closed, which reduces the wear of the nozzle, thereby increasing the service life of the device.

[0056] Working principle: When the device is powered off and not working, the cut-off coil 103 is powered off, the air inlet 106 is disconnected from the cut-off spring chamber 9, the air supply chamber 108 is disconnected from the communication chamber 110, and the high-pressure gas enters the air inlet chamber 7 and the cut-off spring chamber 9 through the gas inlet 12; When the device is powered on and working, the cut-off coil 103 is energized, the air inlet 106 is disconnected from the cut-off spring chamber 9, the air supply chamber 108 is disconnected from the connecting chamber 110, and the high-pressure gas in the cut-off spring chamber 9 enters the diaphragm lower chamber 5 through the cut-off air supply chamber 108 and the connecting chamber 110 in turn, and the high-pressure gas enters the pressure regulating rear chamber 17 through the through hole 18, and then enters the pressure regulating front chamber 16 through the pressure regulating valve opening, so that the gas pressure in the pressure regulating front chamber 16 increases, thereby overcoming the elastic force of the cut-off spring 83 to push the cut-off valve core 81 to move, open the cut-off valve opening, so that the air inlet chamber 7 is connected with the pressure regulating front chamber 16, so that the gas in the air inlet chamber 7 can enter the pressure regulating front chamber 16, and after the high-pressure gas enters the pressure regulating front chamber 16 and is throttled and reduced in pressure by the pressure regulating valve opening, the gas enters the pressure regulating rear chamber 17, and part of the gas enters the diaphragm lower chamber through the through hole 18. 5. The gas pushes the diaphragm assembly 3 to overcome the elastic force of the second pressure regulating spring 67. When the difference in force between the two reaches the set value, a pressure equilibrium state is reached, and the remaining gas enters the inner cavity of the nozzle 112 and is discharged from the flow regulating port 114 into the inlet and outlet gas cavity 113, and then the gas is discharged from the gas outlet 13; the temperature and pressure in the lower cavity 5 of the diaphragm are monitored by the temperature and pressure sensor 22. According to the feedback result, the ECU controls the controller 20, and the controller 20 controls the linear motor 116, so that the linear motor 116 drives the core shaft 115 to move, so as to change the area of ​​the flow regulating port 114, thereby controlling the outflow area of ​​the gas, and the pressure regulating valve core 61 automatically adjusts the opening size of the pressure regulating valve port until the upper cavity of the diaphragm and the lower cavity of the diaphragm reach a pressure equilibrium state again, so that the device can achieve the purpose of accurately controlling the gas flow and provide stable pressure gas.

[0057] The present invention realizes all functions of cutting off, pressure regulation and flow regulation, and can automatically adjust the working parameters in real time, thereby achieving the functions of pressure regulation and gas supply.

[0058] The present invention is a reliable mechanical pressure reducing device that can provide stable pressure gas. The present invention has a lower failure rate than an electrically controlled pressure reducing device and is easier to manufacture, install and implement. The gas flow area is changed by changing the area of ​​the specially designed flow regulating port 114, which is more linear than other controls.

[0059] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A proportional flow area valve, characterized in that: include: Valve cover (1); A valve body (2), wherein a diaphragm cavity is formed between the valve body (2) and the valve cover (1), a diaphragm assembly (3) is installed in the diaphragm cavity, the diaphragm assembly (3) divides the diaphragm cavity into an upper diaphragm cavity (4) and a lower diaphragm cavity (5), a pressure regulating cavity connected to the lower diaphragm cavity (5) is provided in the valve body (2), an air intake cavity (7) connected to the pressure regulating cavity is opened at one end of the valve body (2), and a gas inlet (12) connected to the air intake cavity (7) is installed on the valve body (2); A pressure regulating mechanism (6), the pressure regulating mechanism (6) being installed in the pressure regulating cavity and used for achieving throttling and pressure reduction of the fuel gas; A cut-off mechanism (8), the cut-off mechanism (8) being slidably mounted in the air inlet cavity (7), and a cut-off spring cavity (9) being provided on an end of the cut-off mechanism (8) away from the pressure regulating cavity; A cut-off mechanism (10), the cut-off mechanism (10) being mounted on one end of the valve body (2) located at the air inlet chamber (7); wherein when the cut-off mechanism (10) is powered off, the gas inlet (12) is connected to the cut-off spring chamber (9), and the cut-off spring chamber (9) is not connected to the diaphragm lower chamber (5); and when the cut-off mechanism (10) is powered on, the gas inlet (12) is not connected to the cut-off spring chamber (9), and the cut-off spring chamber (9) is connected to the diaphragm lower chamber (5); A flow regulating mechanism (11) is used to control the gas flow rate. The flow regulating mechanism (11) is installed on an end of the valve body (2) away from the cut-off mechanism (10). The flow regulating mechanism (11) is provided with a gas outlet (13) connected to the pressure regulating cavity.

2. The proportional flow area valve according to claim 1, characterized in that: An upper protective cover (14) is mounted on one end of the valve cover (1) away from the valve body (2), and a lower protective cover (15) is mounted on one end of the valve body (2) away from the valve cover (1).

3. The proportional flow area valve according to claim 2, characterized in that: The pressure regulating mechanism (6) comprises: A pressure regulating valve core (61), the pressure regulating valve core (61) being located in the pressure regulating cavity and being slidably connected to the lower protective cover (15); a pressure regulating valve seat (62), the pressure regulating valve seat (62) being arranged in the pressure regulating cavity and being capable of sealingly cooperating with the pressure regulating valve core (61); a pressure regulating valve opening is formed between the pressure regulating valve core (61) and the pressure regulating valve seat (62); the pressure regulating valve seat (62) divides the pressure regulating cavity into a pressure regulating front cavity (16) and a pressure regulating rear cavity (17); the pressure regulating front cavity (16) being capable of communicating with the air inlet cavity (7); a first pressure regulating spring (63), wherein the first pressure regulating spring (63) is sleeved on the outside of the pressure regulating valve core (61), one end of the first pressure regulating spring (63) is connected to the pressure regulating valve core (61), and the other end of the first pressure regulating spring (63) is in contact with the inner wall of the lower protective cover (15); A pressure regulating valve stem (64), the pressure regulating valve stem (64) being connected to the pressure regulating valve core (61), the pressure regulating valve stem (64) extending into the lower cavity (5) of the diaphragm to abut against the diaphragm assembly (3).

4. The proportional flow area valve according to claim 3, characterized in that: The pressure regulating mechanism (6) further comprises: an adjusting screw (65), wherein the adjusting screw (65) is threadedly mounted on the valve cover (1); A spring seat (66), wherein the spring seat (66) is slidably mounted in the diaphragm upper cavity (4), and one end of the adjusting screw (65) extending into the diaphragm upper cavity (4) is connected to the spring seat (66); A second pressure regulating spring (67), one end of the second pressure regulating spring (67) abutting against the spring seat (66), and the other end of the second pressure regulating spring (67) connected to the diaphragm assembly (3).

5. The proportional flow area valve according to claim 4, characterized in that: The cut-off mechanism (8) comprises: A stop valve core (81), the stop valve core (81) being slidably mounted in the air inlet cavity (7), and a stop spring cavity (9) being formed on one end of the stop valve core (81) away from the pressure regulating cavity; A stop valve seat (82), the stop valve seat (82) being arranged in the pressure regulating cavity and being capable of sealingly cooperating with the stop valve core (81), wherein a stop valve opening is formed between the stop valve core (81) and the stop valve seat (82); A cut-off spring (83) is installed in the cut-off spring cavity (9), one end of the cut-off spring (83) is connected to the inner wall of the cut-off spring cavity (9), and the other end of the cut-off spring (83) is in contact with the cut-off mechanism (10).

6. The proportional flow area valve according to claim 5, characterized in that: The cutting mechanism (10) comprises: A cut-off housing (101), the cut-off housing (101) being mounted on one end of the valve body (2) located at the air inlet chamber (7); A frame (102), wherein the frame (102) is installed in the cutting shell (101); A cut-off coil (103), wherein the cut-off coil (103) is wound outside the frame (102); A cut-off moving iron core (104), wherein the cut-off moving iron core (104) is slidably mounted in the frame (102); A cut-off valve seat (105), the cut-off valve seat (105) being arranged in the frame (102) and being capable of sealingly cooperating with the cut-off movable iron core (104), wherein a cut-off valve opening is formed between the cut-off movable iron core (104) and the cut-off valve seat (105); A cut-off air inlet (106), the cut-off air inlet (106) being provided at one end of the cut-off housing (101), and the cut-off air inlet (106) penetrating the cut-off valve seat (105), the cut-off air inlet (106) being connected to the gas inlet (12), the cut-off moving iron core (104) being capable of sealing the cut-off air inlet (106), and the cut-off air inlet (106) being capable of communicating with the cut-off spring chamber (9) through the cut-off valve opening; a cut-off spring (107), the cut-off spring (107) being sleeved on the outside of the cut-off movable iron core (104) and the cut-off valve seat (105), one end of the cut-off spring (107) being connected to the cut-off movable iron core (104), and the other end of the cut-off spring (107) being connected to the cut-off valve seat (105); a cut-off air supply chamber (108), the cut-off air supply chamber (108) being disposed on an end of the cut-off housing (101) away from the cut-off air inlet (106), the cut-off air supply chamber (108) being able to communicate with the cut-off air inlet (106) via a cut-off valve opening, and the cut-off air supply chamber (108) being in communication with the cut-off spring chamber (9); A movable block (109), wherein the movable block (109) is slidably installed in the cut-off air supply chamber (108), and the movable block (109) is connected to the cut-off moving iron core (104), and a connecting chamber (110) is provided on a side of the movable block (109) away from the cut-off moving iron core (104), and the connecting chamber (110) is connected to the lower chamber of the diaphragm (5), wherein when the cut-off coil (103) is energized, the connecting chamber (110) is connected to the cut-off air supply chamber (108).

7. The proportional flow area valve according to claim 6, characterized in that: The flow regulating mechanism (11) comprises: A mounting shell (111), the mounting shell (111) being mounted on an end of the valve body (2) away from the shut-off mechanism (10), and a gas outlet (13) being mounted on an end of the mounting shell (111) close to the valve body (2); A nozzle (112), the nozzle (112) being mounted on one end of the mounting housing (111) close to the valve body (2), the inner cavity of the nozzle (112) being in communication with the pressure regulating rear cavity (17); An air outlet cavity (113), wherein an air outlet cavity (113) is formed between the outside of the nozzle (112) and the mounting shell (111), the air outlet cavity (113) is in communication with the gas outlet (13), and the air outlet cavity (113) is in communication with the upper cavity (4) of the diaphragm; A flow regulating port (114), the flow regulating port (114) being disposed on the outer circumferential wall of the nozzle (112), and a plurality of the flow regulating ports (114) being provided, capable of connecting the inner cavity of the nozzle (112) with the air outlet cavity (113); A core shaft (115), wherein the core shaft (115) is slidably disposed in the nozzle (112); A linear motor (116) is installed on an end of the installation housing (111) away from the valve body (2), and a moving rod of the linear motor (116) is connected to the core shaft (115).

8. The proportional flow area valve according to claim 7, characterized in that: A controller (20) for controlling the linear motor (116) is mounted on the mounting housing (111).

9. The proportional flow area valve according to claim 3, characterized in that: A bottom chamber (19) is provided in the lower protective cover (15), the pressure regulating valve core (61) is located in the bottom chamber (19), and the pressure regulating valve core (61) slides in the bottom chamber (19), and the bottom chamber (19) is communicated with the pressure regulating front chamber (16).

10. The proportional flow area valve according to claim 7, characterized in that: The cross-sectional shape of the flow regulating port (114) is Y-shaped.

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