Proportional flow area valve

Abstract

The application discloses a proportional flow area valve, which comprises a valve cover, a valve body, a pressure regulating mechanism, a cut-off mechanism, a cut-out mechanism and a flow regulating mechanism, a diaphragm cavity is formed between the valve cover and the valve body, 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 is arranged in the valve body and communicates with the lower diaphragm cavity, an air inlet cavity is arranged in one end of the valve body and communicates with the pressure regulating cavity, a gas inlet is installed on the valve body and communicates with the air inlet cavity, the pressure regulating mechanism is installed in the pressure regulating cavity, the cut-off mechanism is slidingly installed in the air inlet cavity, the cut-out mechanism is installed on one end of the valve body located in the air inlet cavity, the flow regulating mechanism is installed on one end of the valve body away from the cut-out mechanism, and a gas outlet is installed on the flow regulating mechanism and communicates with the pressure regulating cavity. The application can accurately control the gas flow, provides stable pressure gas, and has a long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a proportional flow area valve. BACKGROUND

[0002] The engine gas supply technology currently used on the market has two ways, namely, the proportional mixer and the mechanical pressure regulator. The proportional mixer technology is to reduce the high-pressure gas stored in the gas cylinder to the working pressure, and then mix the natural gas and air according to the established proportion by the proportional mixer, and then enter the cylinder for combustion. The mechanical pressure regulator technology is to supply the high-pressure gas after reduction to the gas nozzle, and the gas is sprayed into the air intake pipe to mix with the air and then enter the cylinder for combustion.

[0003] The gas flow of the traditional proportional mixer is determined according to the valve core profile, and the gas flow depends on the design and processing level of the valve core. The proportional mixer is completely a mechanical part, and cannot be adjusted according to the actual effect of gas supply. Once the valve core is worn or the pipeline leaks, the directional deviation of the gas flow cannot be corrected, which leads to the inability to accurately control the gas flow.

[0004] The technical scheme of the mechanical pressure regulator supplying the high-pressure gas after reduction to the gas nozzle is that the fuel sprayed by the nozzle is pulsating, which causes the cyclic fluctuation of the air-fuel ratio. The nozzle can only adjust the flow size by changing the opening time or a more complex way. With the increase of the opening and closing times of the nozzle, the wear of the nozzle will be aggravated, which affects the service life of the nozzle. Moreover, the mechanical pressure regulator generally cannot cut off the gas supply, and a cut-off valve needs to be installed separately on the upstream pipeline.

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

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a proportional flow area valve.

[0007] To achieve the above purpose, the following technical scheme is adopted:

[0008] A proportional flow area valve comprises:

[0009] a valve cover;

[0010] 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 is arranged in the valve body and communicates with the lower diaphragm cavity, an air inlet cavity is arranged at one end of the valve body and communicates with the pressure regulating cavity, and a gas inlet is installed on the valve body and communicates with the air inlet cavity;

[0011] A pressure regulating mechanism is installed in the pressure regulating cavity for throttling and reducing the pressure of the gas;

[0012] A cutoff mechanism is slidingly installed in the air inlet cavity, and a cutoff spring cavity is formed on the end of the cutoff mechanism away from the pressure regulating cavity;

[0013] A cutoff mechanism is installed on the end of the valve body located in the air inlet cavity; when the cutoff mechanism is powered off, the gas inlet is in communication with the cutoff spring cavity, and the cutoff spring cavity is not in communication with the diaphragm lower cavity; when the cutoff mechanism is powered on, the gas inlet is not in communication with the cutoff spring cavity, and the cutoff spring cavity is in communication with the diaphragm lower cavity;

[0014] A flow regulating mechanism is installed on the end of the valve body away from the cutoff mechanism for controlling the flow of the gas, and a gas outlet in communication with the pressure regulating cavity is installed on the flow regulating mechanism.

[0015] Further, an upper protective cover is installed on the end of the valve cover away from the valve body, and a lower protective cover is installed on the end of the valve body away from the valve cover.

[0016] Further, the pressure regulating mechanism comprises:

[0017] A pressure regulating valve core is located in the pressure regulating cavity and is slidingly connected with the lower protective cover;

[0018] A pressure regulating valve seat is provided in the pressure regulating cavity and can sealingly cooperate with the pressure regulating valve core, and a pressure regulating valve port opening is formed between the pressure regulating valve core and the pressure regulating valve seat, the pressure regulating valve seat separates the pressure regulating cavity into a pressure regulating front cavity and a pressure regulating rear cavity, and the pressure regulating front cavity can be in communication with the air inlet cavity;

[0019] A 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 with the pressure regulating valve core, and the other end of the first pressure regulating spring is in abutment with the inner wall of the lower protective cover;

[0020] A pressure regulating valve rod is connected with the pressure regulating valve core, and the pressure regulating valve rod extends into the diaphragm lower cavity and is in abutment with the diaphragm assembly.

[0021] Further, the pressure regulating mechanism further comprises:

[0022] An adjusting screw is threadedly installed on the valve cover;

[0023] A spring seat is slidingly installed in the diaphragm upper cavity, and one end of the adjusting screw extending into the diaphragm upper cavity is connected with the spring seat;

[0024] A second pressure regulating spring has one end in abutment with the spring seat and the other end connected with the diaphragm assembly.

[0025] Further, the cutoff mechanism comprises:

[0026] a cutoff valve core, which is slidingly installed in the air inlet cavity, and a cutoff spring cavity is formed on one end of the cutoff valve core away from the pressure regulating cavity;

[0027] a cutoff valve seat, which is arranged in the pressure regulating cavity and can sealingly cooperate with the cutoff valve core, and a cutoff valve port opening is formed between the cutoff valve core and the cutoff valve seat;

[0028] a cutoff spring, which is installed in the cutoff spring cavity, one end of the cutoff spring is connected with the inner wall of the cutoff spring cavity, and the other end of the cutoff spring is in abutment with the cutoff mechanism.

[0029] Further, the cutoff mechanism comprises:

[0030] a cutoff housing, which is installed on one end of the valve body located in the air inlet cavity;

[0031] a skeleton, which is installed in the cutoff housing;

[0032] a cutoff coil, which is wound outside the skeleton;

[0033] a cutoff moving iron core, which is slidingly installed in the skeleton;

[0034] a cutoff valve seat, which is arranged in the skeleton and can sealingly cooperate with the cutoff moving iron core, and a cutoff valve port opening is formed between the cutoff moving iron core and the cutoff valve seat;

[0035] a cutoff air inlet, which is formed on one end of the cutoff housing and penetrates the cutoff valve seat, the cutoff air inlet is in communication with the gas inlet, the cutoff moving iron core can seal the cutoff air inlet, and the cutoff air inlet can be in communication with the cutoff spring cavity through the cutoff valve port opening;

[0036] a cutoff spring, which is sleeved outside the cutoff moving iron core and the cutoff valve seat, one end of the cutoff spring is connected with the cutoff moving iron core, and the other end of the cutoff spring is connected with the cutoff valve seat;

[0037] a cutoff gas supply cavity, which is formed on one end of the cutoff housing away from the cutoff air inlet, the cutoff gas supply cavity can be in communication with the cutoff air inlet through the cutoff valve port opening, and the cutoff gas supply cavity is in communication with the cutoff spring cavity;

[0038] The movable block is slidingly installed in the cut-off air supply cavity and connected with the cut-off moving iron core, a communication cavity is formed on the side of the movable block away from the cut-off moving iron core, and the communication cavity is communicated with the lower cavity of the diaphragm.

[0039] Further, the flow regulating mechanism comprises:

[0040] The installation housing is installed on the end of the valve body away from the cut-off mechanism, and the gas outlet is installed on the end of the installation housing close to the valve body;

[0041] The nozzle is installed in the installation housing close to the end of the valve body, and the inner cavity of the nozzle is communicated with the pressure-regulated rear cavity;

[0042] The gas outlet cavity is formed between the outer part of the nozzle and the installation housing, the gas outlet cavity is communicated with the gas outlet, and the gas outlet cavity is communicated with the upper cavity of the diaphragm;

[0043] The flow regulating ports are formed on the outer circumferential wall of the nozzle, the flow regulating ports are provided with a plurality of flow regulating ports, and the inner cavity of the nozzle and the gas outlet cavity are communicated;

[0044] The mandrel is slidingly arranged in the nozzle;

[0045] The linear motor is installed in the installation housing away from the end of the valve body, and the moving rod of the linear motor is connected with the mandrel.

[0046] Further, the installation housing is provided with a controller for controlling the linear motor.

[0047] Further, the lower protective cover is provided with a bottom cavity, the pressure regulating valve core is slidingly arranged in the bottom cavity, and the pressure regulating valve core is slidingly connected with the bottom cavity, and the bottom cavity is communicated with the pressure-regulated front cavity.

[0048] Further, the cross section of the flow regulating port is in the shape of Y.

[0049] Compared with the prior art, the present application provides a proportional flow area valve, which has the following beneficial effects:

[0050] 1、The present application is not powered, high pressure gas through the gas inlet into the intake cavity and stop spring cavity, by the cut-off mechanism so that the intake cavity and pressure regulating cavity is not connected, at this time the device does not work; when the device is powered, cut-off mechanism will be disconnected with the gas inlet spring cavity, stop spring cavity and diaphragm cavity communication, high pressure gas in the stop spring cavity into the diaphragm cavity, then into the pressure regulating cavity, so that the pressure in the pressure regulating cavity rises, cut-off mechanism is pushed, so that the intake cavity and pressure regulating cavity is connected, so that the high pressure gas in the intake cavity into the pressure regulating cavity, through the pressure regulating mechanism of energy saving pressure reduction, so that the high pressure gas into low pressure gas, through the flow regulating mechanism for controlling the gas flow, so that the low pressure gas from the gas outlet; when the high pressure gas through the pressure regulating mechanism of energy saving pressure reduction, low pressure gas can enter the diaphragm cavity, push the diaphragm assembly, so as to adjust the pressure regulating mechanism, until the diaphragm upper cavity and diaphragm lower cavity reaches the pressure balance state, when the flow regulating mechanism for adjusting the size of the gas flow, the pressure regulating mechanism will automatically adjust, until the diaphragm upper cavity and diaphragm lower cavity again reaches the pressure balance state, so that the device to achieve the purpose of precise control of gas flow, can provide stable pressure gas.

[0051] 2、The present application is special design for the flow regulating port, under the movement of the core shaft driven by the linear motor, open the flow regulating port, so that the engine works, gas flow can flow continuously, through the controller control linear motor, so that the linear motor drive core shaft movement, to change the area of flow regulating port, and then control the outflow area of gas, so as to achieve the purpose of controlling the gas flow, so that the engine works, the flow regulating port is always open, and will not be completely closed, only when the engine does not work, the flow regulating port is completely closed, reduce the wear of nozzle, so that the service life of the device is high.

[0052] 3、The present application is integrated into one by the cut-off mechanism, pressure regulating mechanism and flow regulating mechanism, realizes all functions of cut-off, pressure regulating and flow regulating, can automatically adjust the working condition parameters in real time, so as to realize the role of pressure regulating and gas supply.

[0053] 4、The present application is a reliable mechanical pressure reducing device, can provide stable pressure gas; the present application has lower failure rate than the electric control pressure reducing device, and is easier to realize in manufacturing and installation; the flow regulating mechanism changes the area of the specially designed flow regulating port, realizes the change of gas flow area, and is more linear than other controls. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 is a front view of the present application, a proportional flow area valve structure schematic diagram;

[0055] Figure 2 is a front view of the present application, a proportional flow area valve structure schematic diagram;

[0056] Figure 3 is Figure 2 is a schematic diagram of the cross-sectional structure of A-A direction in the figure;

[0057] Figure 4 is a schematic diagram of the three-dimensional structure of a proportional flow area valve of the present application;

[0058] Figure 5 is a schematic diagram of the left view cross-sectional structure of the cut-off mechanism.

[0059] Marked 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 rod; 65, adjusting screw; 66, spring seat; 67, second pressure regulating spring; 7, 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, skeleton; 103, cut-off coil; 104, cut-off moving iron core; 105, cut-off valve seat; 106, cut-off inlet; 107, cut-off spring; 108, cut-off air supply cavity; 109, movable block; 110, communication cavity; 11, flow regulating mechanism; 111, mounting housing; 112, nozzle; 113, outlet cavity; 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 cavity; 17, pressure regulating rear cavity; 18, through hole; 19, bottom cavity; 20, controller; 21, cut-off joint; 22, temperature and pressure sensor. DETAILED DESCRIPTION

[0060] The present application will be further described below in combination with the drawings and examples:

[0061] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the mechanical parts and equipment adopt the conventional types in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0062] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate an orientation or positional relationship based on the orientation or position shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0063] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0065] The embodiment of the present application provides a proportional flow area valve, which refers to Figures 1 to 5 , comprising: a valve cover 1, a valve body 2, a pressure regulating mechanism 6, a cutoff mechanism 8, a cut-off mechanism 10 and a flow regulating mechanism 11, the valve body 2 and the valve cover 1 form a diaphragm cavity, a diaphragm assembly 3 is installed in the diaphragm cavity, the diaphragm assembly 3 separates the diaphragm cavity into a diaphragm upper cavity 4 and a diaphragm lower cavity 5, the valve body 2 is provided with a pressure regulating cavity communicating with the diaphragm lower cavity 5, one end of the valve body 2 is provided with an air inlet cavity 7 communicating with the pressure regulating cavity, the valve body 2 is provided with a gas inlet 12 communicating with the air inlet cavity 7, the pressure regulating mechanism 6 is installed in the pressure regulating cavity, for realizing throttling and pressure reduction of the gas, the cutoff mechanism 8 is slidingly installed in the air inlet cavity 7, the cutoff mechanism 8 is provided with a cutoff spring cavity 9 at one end away from the pressure regulating cavity, the cut-off mechanism 10 is installed on one end of the valve body 2 located in the air inlet cavity 7; wherein, when the cut-off mechanism 10 is powered off, the gas inlet 12 communicates with the cutoff spring cavity 9, the cutoff spring cavity 9 does not communicate with the diaphragm lower cavity 5, when the cut-off mechanism 10 is powered on, the gas inlet 12 does not communicate with the cutoff spring cavity 9, the cutoff spring cavity 9 communicates with the diaphragm lower cavity 5, the flow regulating mechanism 11 is used for controlling the gas flow, the flow regulating mechanism 11 is installed on one end of the valve body 2 away from the cut-off mechanism 10, and the flow regulating mechanism 11 is provided with a gas outlet 13 communicating with the pressure regulating cavity.

[0066] Specifically, the valve cover 1 is mounted on the valve body 2 by screws; the diaphragm assembly 3 includes a diaphragm, a mounting seat and a mounting rod, the diaphragm edge is clamped and sealed by the valve cover 1 and the valve body 2, the mounting seat is mounted on one side of the diaphragm upper cavity 4, the mounting rod is mounted in the middle of the diaphragm, the mounting rod is located in the diaphragm lower cavity 5 and connected through the diaphragm and the mounting seat; the valve body 2 is provided with a through hole 18 for communicating the diaphragm lower cavity 5 with the pressure regulating cavity; the cut-off mechanism 8 is provided for controlling the communication or closing of the inlet cavity 7 and the pressure regulating cavity.

[0067] The cut-off joint 21 is mounted on one side of the cut-off mechanism 10; the controller 20 is mounted on the end of the flow regulating mechanism 11 away from the valve body 2, and the chip joint is mounted on the controller 20; the temperature and pressure sensor 22 is mounted on the valve body 2 for monitoring the temperature and pressure in the pressure regulating cavity; the cut-off joint 21, the chip joint and the temperature and pressure sensor 22 are all communicated with the ECU (Electronic Control Unit) through external wiring harness, the temperature and pressure sensor 22 feeds back data to the ECU, the ECU processes the data and judges the working condition of the valve, and transmits new commands to the cut-off joint 21 and the chip joint, the cut-off joint 21 and the chip joint receive the commands and execute them, so as to achieve the overall control of the valve, thereby controlling the supply of gas flow and realizing the closed-loop control ability of the supply system.

[0068] Referring to Figures 1 to 4 In this embodiment, the valve cover 1 is provided with an upper protective cover 14 on the end away from the valve body 2, and the valve body 2 is provided with a lower protective cover 15 on the end away from the valve cover 1.

[0069] Specifically, the upper protective cover 14 is threadedly and sealingly connected with the valve cover 1; the lower protective cover 15 is threadedly and sealingly connected with the valve body 2.

[0070] Referring to 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 rod 64, the pressure regulating valve core 61 is located in the pressure regulating cavity and is in sliding connection with the lower protective cover 15, the pressure regulating valve seat 62 is arranged in the pressure regulating cavity and can be sealingly matched with the pressure regulating valve core 61, the pressure regulating valve core 61 and the pressure regulating valve seat 62 form a pressure regulating valve port opening, 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 can be communicated with the inlet cavity 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 with 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 rod 64 is connected with the pressure regulating valve core 61, and the pressure regulating valve rod 64 extends into the diaphragm lower cavity 5 and abuts against the diaphragm assembly 3.

[0071] Specifically, the through hole 18 communicates the diaphragm lower cavity 5 with the pressure-regulated rear cavity 17; the temperature and pressure sensor 22 is used to monitor the temperature and pressure in the pressure-regulated rear cavity 17; the cut-off mechanism 8 is used to control the communication or closing of the air inlet cavity 7 with the pressure-regulated front cavity 16; the pressure-regulated front cavity 16 is a high-pressure gas cavity, and the pressure-regulated rear cavity 17 is a low-pressure gas cavity; the upper part of the pressure-regulating valve rod 64 penetrates through the valve body 2, and the pressure-regulating valve rod 64 is in sliding connection with the valve body 2; the top of the pressure-regulating valve rod 64 abuts against the mounting rod of the diaphragm assembly 3; the pressure-regulating valve rod 64 and the mounting rod are positioned by the concave-convex structure matching therebetween; the first pressure-regulating spring 63 provides an upward thrust to the pressure-regulating valve core 61, so as to exert an upward thrust to the pressure-regulating valve rod 64, so that the pressure-regulating valve rod 64 pushes the mounting rod, and the abutment between the pressure-regulating valve rod 64 and the mounting rod is achieved.

[0072] Wherein, referring to Figure 1 In the embodiment, the lower protective cover 15 is provided with a bottom cavity 19, and the pressure-regulating valve core 61 is located in the bottom cavity 19 and slides in the bottom cavity 19; the bottom cavity 19 communicates with the pressure-regulated front cavity 16.

[0073] Specifically, the high-pressure gas can enter the bottom cavity 19, so as to play a role in assisting the regulation of the pressure-regulating valve port opening size, and the diaphragm assembly 3 can reach a pressure balance state more quickly under the gas pressure.

[0074] Referring to Figure 1 In the embodiment, the pressure-regulating mechanism 6 further comprises 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 slidingly installed in the diaphragm upper cavity 4; one end of the adjusting screw 65 extending into the diaphragm upper cavity 4 is connected with the spring seat 66; one end of the second pressure-regulating spring 67 abuts against the spring seat 66, and the other end of the second pressure-regulating spring 67 is connected with the diaphragm assembly 3.

[0075] 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 with the mounting seat of the diaphragm assembly 3.

[0076] By opening the upper protective cover 14 and rotating the adjusting screw 65, the spring seat 66 is moved, the spring loading force of the second pressure-regulating spring 67 can be increased or decreased, so that the pressure-regulating setting value is increased or decreased.

[0077] When the device is powered off, under the spring loading force of the second pressure-regulating spring 67, the pressure-regulating valve core 61 and the pressure-regulating valve seat 62 have a certain pressure-regulating valve port opening size.

[0078] By adjusting the size of the pressure regulating valve port opening, the purpose of pressure reduction is achieved by throttling. When high-pressure gas enters the pressure regulating front cavity 16 and is reduced in pressure by throttling through the pressure regulating valve port opening, the gas enters the pressure regulating rear cavity 17. Part of the gas enters the diaphragm lower cavity 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. When the force difference between the two reaches the set value, the pressure balance state is reached. The pressure regulating valve core 61 moves under the action of the elastic force of the first pressure regulating spring 63, thereby adjusting the size of the pressure regulating valve port opening, and further achieving the purpose of throttling and pressure reduction.

[0079] When the gas in the pressure regulating rear cavity 17 is over-pressurized, the gas in the diaphragm lower cavity 5 is also over-pressurized. 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 action of the elastic force of the first pressure regulating spring 63, making the pressure regulating valve port opening smaller and smaller until it is closed, preventing the gas in the pressure regulating front cavity 16 from entering the pressure regulating rear cavity 17 through the pressure regulating valve port opening, and making the gas pressure in the pressure regulating rear cavity 17 larger and larger, causing damage to the device.

[0080] Referring to Figure 1 and Figure 3 In this embodiment, the cutoff mechanism 8 includes a cutoff valve core 81, a cutoff valve seat 82, and a cutoff spring 83. The cutoff valve core 81 is slidingly installed in the air inlet cavity 7. A cutoff spring cavity 9 is formed on the end of the cutoff valve core 81 away from the pressure regulating cavity. The cutoff valve seat 82 is arranged in the pressure regulating cavity and can sealingly cooperate with the cutoff valve core 81. The cutoff valve core 81 and the cutoff valve seat 82 form a cutoff valve port opening therebetween. The cutoff spring 83 is installed in the cutoff spring cavity 9. One end of the cutoff spring 83 is connected to the inner wall of the cutoff spring cavity 9, and the other end of the cutoff spring 83 abuts against the cutoff mechanism 10.

[0081] Specifically, by turning on and off the cutoff mechanism 10, the flow direction of the gas entering the cutoff mechanism 10 from the gas inlet 12 is changed, thereby controlling the movement of the cutoff valve core 81 to achieve the purpose of opening and closing the cutoff valve port opening.

[0082] When the device is powered off, the cutoff mechanism 10 is powered off, and the cutoff spring cavity 9 is filled with high-pressure gas. Under the combined action of the cutoff spring 83 and the high-pressure gas, the cutoff valve core 81 is pushed to move, so that the cutoff valve core 81 cooperates with the cutoff valve seat 82 to close the cutoff valve port opening, and the air inlet cavity 7 is disconnected from the pressure regulating front cavity 16.

[0083] When the device is powered on, the cut-off mechanism 10 is powered on, the high-pressure gas in the cut-off spring cavity 9 is discharged into the diaphragm lower cavity 5, the high-pressure gas enters the pressure regulating rear cavity 17 through the through hole 18, then enters the pressure regulating front cavity 16 through the pressure regulating valve port opening, so that the gas pressure in the pressure regulating front cavity 16 rises, 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 port opening, so that the air inlet cavity 7 and the pressure regulating front cavity 16 are communicated, so that the gas in the air inlet cavity 7 can enter the pressure regulating front cavity 16.

[0084] Referring to Figure 5 In this embodiment, the cut-off mechanism 10 includes a cut-off housing 101, a skeleton 102, a cut-off coil 103, a cut-off moving iron core 104, a cut-off valve seat 105, a cut-off air inlet 106, a cut-off spring 107, a cut-off gas supply cavity 108 and a movable block 109, the cut-off housing 101 is installed on one end of the valve body 2 located in the air inlet cavity 7, the skeleton 102 is installed in the cut-off housing 101, the cut-off coil 103 is wound outside the skeleton 102, the cut-off moving iron core 104 is slidingly installed in the skeleton 102, the cut-off valve seat 105 is arranged in the skeleton 102 and can be sealingly matched with the cut-off moving iron core 104, the cut-off valve port 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 arranged on one end of the cut-off housing 101 and penetrates the cut-off valve seat 105, the cut-off air inlet 106 is in communication with the gas inlet 12, the cut-off moving iron core 104 can seal the cut-off air inlet 106, the cut-off air inlet 106 can communicate with the cut-off spring cavity 9 through the cut-off valve port opening, the cut-off spring 107 is sleeved outside the cut-off moving iron core 104 and the cut-off valve seat 105, one end of the cut-off spring 107 is connected with the cut-off moving iron core 104, the other end of the cut-off spring 107 is connected with the cut-off valve seat 105, the cut-off gas supply cavity 108 is arranged on the end of the cut-off housing 101 away from the cut-off air inlet 106, the cut-off gas supply cavity 108 can communicate with the cut-off air inlet 106 through the cut-off valve port opening, the cut-off gas supply cavity 108 is in communication with the cut-off spring cavity 9, the movable block 109 is slidingly installed in the cut-off gas supply cavity 108 and connected with the cut-off moving iron core 104, a communication cavity 110 is arranged on the side of the movable block 109 away from the cut-off moving iron core 104, the communication cavity 110 is in communication with the diaphragm lower cavity 5, and when the cut-off coil 103 is powered on, the communication cavity 110 is in communication with the cut-off gas supply cavity 108.

[0085] Specifically, the cut-off shell 101 is mounted on one end of the valve body 2 by screws; the cut-off joint 21 is mounted 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 cavity 9 corresponds to the position between the cut-off moving iron core 104 and the cut-off valve seat 105; the end of the cut-off moving iron core 104 close to the cut-off inlet 106 is provided with a mounting cap capable of sealing the cut-off inlet 106, and one end of the cut-off spring 107 is connected with the mounting cap; the cut-off moving iron core 104 and the skeleton 102 have a gap through which gas passes; when the cut-off coil 103 is de-energized, the gap between the cut-off gas supply cavity 108 and the communication cavity 110 is completely sealed under the thrust of the cut-off spring 107.

[0086] When the cut-off coil 103 is de-energized, the cut-off moving iron core 104 and the cut-off valve seat 105 have a certain cut-off valve opening under the elastic force of the cut-off spring 107, at the same time, the cut-off gas supply cavity 108 and the communication cavity 110 are closed, and the high-pressure gas enters the cut-off gas supply cavity 108 and the cut-off spring cavity 9 through the cut-off inlet 106 and the cut-off valve opening;

[0087] When the cut-off coil 103 is energized, the cut-off moving iron core 104 and the cut-off valve seat 105 generate an electromagnetic force, the cut-off moving iron core 104 contacts the cut-off valve seat 105 by overcoming the elastic force of the cut-off spring 107, and the cut-off inlet 106 is closed, the cut-off valve opening is closed, at the same time, the cut-off moving iron core 104 drives the movable block 109 to move in the cut-off gas supply cavity 108, so that the cut-off gas supply cavity 108 and the communication cavity 110 are communicated, and the high-pressure gas in the cut-off spring cavity 9 enters the diaphragm lower cavity 5 through the cut-off gas supply cavity 108 and the communication cavity 110 in turn.

[0088] Referring to Figure 1 and Figure 3In this embodiment, the flow regulating mechanism 11 includes: a mounting housing 111, a nozzle 112, a gas outlet chamber 113, a flow regulating port 114, a spindle 115, and a linear motor 116. The mounting housing 111 is mounted on the end of the valve body 2 away from the cut-off mechanism 10. A gas outlet 13 is mounted on the end of the mounting housing 111 near the valve body 2. The nozzle 112 is mounted inside the mounting housing 111 near the end of the valve body 2. The inner cavity of the nozzle 112 communicates with the pressure regulating chamber 17. The outer surface of the nozzle 112 is connected to the mounting housing. An outlet chamber 113 is formed between the bodies 111. The outlet chamber 113 is connected to the gas outlet 13 and the upper cavity 4 of the diaphragm. The flow regulating port 114 is opened on the outer circumferential wall of the nozzle 112. Several flow regulating ports 114 are provided to connect the inner cavity of the nozzle 112 with the outlet chamber 113. The spindle 115 is slidably disposed in the nozzle 112. The linear motor 116 is installed in the mounting housing 111 at the end away from the valve body 2. The moving rod of the linear motor 116 is connected to the spindle 115.

[0089] Specifically, the mounting housing 111 is mounted on one end of the valve body 2 by screws; the nozzle 112 is arranged in a ring shape; the gas outlet chamber 113 is arranged in a ring shape; the gas outlet chamber 113 is connected to the upper chamber 4 of the diaphragm, so that a pressure difference is maintained between the upper chamber 4 and the lower chamber 5 of the diaphragm, thereby facilitating the control of the gas flow rate of this device; the inner cavity of the nozzle 112 is connected to the gas outlet chamber 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 outside the mounting frame, the magnetic ring core is slidably disposed inside the mounting frame, the moving rod is interference-fitted onto the magnetic ring core, the spring is sleeved outside 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 provides a preload function for the magnetic ring core. The position magnet is installed on the end of the moving rod away from the spindle 115 and is used to sense the movement of the moving rod; the linear motor 116 is an existing device, and its structure and principle are existing technologies.

[0090] The linear motor 116 drives the spindle 115 to move, opening the flow regulating port 114 so that the gas flow can be continuous when the engine is working.

[0091] Among them, reference Figures 1 to 4 In this embodiment, a controller 20 for controlling the linear motor 116 is installed on the mounting housing 111.

[0092] Specifically, the controller 20 is a PCBA module, including a shell, a Hall chip and a control chip, the shell is provided with a chip connector, the Hall chip and the control chip are arranged on the shell, a moving rod extends into the shell, and the other end of the spring is connected with the shell of the controller 20; the accurate position of the moving rod is positioned through calibration of the position magnet and the Hall chip and control of the control chip, so that the moving position of the mandrel 115 is accurately controlled; the controller 20 is an existing device, and the structure and principle thereof are prior art.

[0093] The linear motor 116 is controlled by the controller 20, so that the linear motor 116 drives the mandrel 115 to move, the area of the flow regulating port 114 is changed, the outflow area of the gas is controlled, and the purpose of controlling the gas flow is achieved.

[0094] Reference Figure 1 In the embodiment, the cross-sectional shape of the flow regulating port 114 is Y-shaped.

[0095] Specifically, the cross-sectional shape of the flow regulating port 114 includes but is not limited to Y-shaped, circular, elliptical and the like, and the number of the flow regulating port 114 is preferably 1-3; the number and shape of the flow regulating port 114 in the application are not limited to the above-mentioned embodiments, and different numbers and different types of cross-sectional geometric shapes can be used to achieve different linear flow characteristic curves.

[0096] The application guarantees that the opening degree of the flow regulating port 114 increases from small to large, meets the shape design of the flow regulating port 114 according to the working condition and demand of the engine, and makes the area of the flow regulating port 114 meet the demand of a quadratic function, that is, the area of the flow regulating port 114 increases slowly at first and then rapidly, which is a special design; the shape of the flow regulating port 114 is determined according to the required gas flow and the opening degree of the flow regulating port 114; through this special design, the flow regulating port 114 is always open when the engine works, and will not be completely closed, and only when the engine does not work, the flow regulating port 114 is completely closed, thereby reducing the wear of the nozzle, and prolonging the service life of the device.

[0097] Working principle: when the device is not working, the cut-off coil 103 is powered off, the cut-off air inlet 106 is cut off from the cut-off spring cavity 9, the gas supply cavity 108 is not communicated with the communication cavity 110, and high-pressure gas enters the air inlet cavity 7 and the cut-off spring cavity 9 through the gas inlet 12;

[0098] When the device is powered on, the cut-off coil 103 is powered on, the cut-off inlet 106 is not communicated with the cut-off spring cavity 9, the cut-off gas cavity 108 is communicated with the communication cavity 110, the high-pressure gas in the cut-off spring cavity 9 enters the diaphragm lower cavity 5 in turn through the cut-off gas cavity 108 and the communication cavity 110, the high-pressure gas enters the pressure regulating rear cavity 17 through the through hole 18, and then enters the pressure regulating front cavity 16 through the pressure regulating valve port opening, so that the gas pressure in the pressure regulating front cavity 16 is increased, 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 port opening, so that the cut-off cavity 7 and the pressure regulating front cavity 16 are communicated, so that the gas in the cut-off cavity 7 can enter the pressure regulating front cavity 16, the high-pressure gas enters the pressure regulating front cavity 16 and is reduced in pressure through the throttling of the pressure regulating valve port opening, then the gas enters the pressure regulating rear cavity 17, part of the gas enters the diaphragm lower cavity 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, and when the force value difference reaches a set value, a pressure balance state is reached, and the remaining gas enters the nozzle 112, is discharged into the gas inlet and outlet cavity 113 through the flow regulating port 114, and then the gas is discharged from the gas outlet 13; the temperature and pressure in the diaphragm lower cavity 5 are monitored through the temperature and pressure sensor 22, the ECU control controller 20 is controlled according to the feedback result, the controller 20 controls the linear motor 116, so that the linear motor 116 drives the mandrel 115 to move, thereby changing the area of the flow regulating port 114, and then controlling the outflow area of the gas, the pressure regulating valve core 61 automatically adjusts the size of the pressure regulating valve port opening, until the diaphragm upper cavity and the diaphragm lower cavity reach the pressure balance state again, so that the device can accurately control the gas flow and provide stable pressure gas.

[0099] The present application realizes all functions of cutting off, pressure regulating and flow regulating, can automatically adjust the working condition parameters in real time, and realizes the functions of pressure regulating and gas supply.

[0100] The present application is a reliable mechanical pressure reducing device, can provide stable pressure gas, has lower failure rate than the electric control pressure reducing device, is easier to manufacture and install, and realizes the change of the gas flow area more linearly by changing the area of the specially designed flow regulating port 114.

[0101] The contents not described in detail in the specification belong to the prior art known by those skilled in the art.

[0102] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Obviously, the described examples are only some of the embodiments of the present application, but not all the embodiments. Based on these examples, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Although the present application is described in detail with reference to the above examples, those of ordinary skill in the art can still combine, add or delete the features in the embodiments of the present application according to the circumstances without creative work, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence, and these technical solutions also fall within the scope of the present application.

Claims

1. A proportional flow area valve, comprising a valve cover (1) and 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 communicating with the lower diaphragm cavity (5) is provided in the valve body (2), an air inlet cavity (7) communicating with the pressure regulating cavity is opened at one end of the valve body (2), and a gas inlet (12) communicating with the air inlet cavity (7) is installed on the valve body (2); A pressure regulating mechanism (6) is installed in the pressure regulating cavity to achieve throttling and pressure reduction of the gas; The cut-off mechanism (8) is slidably installed in the air intake chamber (7), and a cut-off spring chamber (9) is provided on the end of the cut-off mechanism (8) away from the pressure regulating chamber; A cutting-off mechanism (10) is installed on one end of the valve body (2) located in the air intake chamber (7); wherein, When the cut-off mechanism (10) is de-energized, the gas inlet (12) is connected to the stop spring cavity (9), and the stop spring cavity (9) is not connected to the diaphragm lower cavity (5). When the cut-off mechanism (10) is energized, the gas inlet (12) is not connected to the stop spring cavity (9), and the stop spring cavity (9) is connected to the diaphragm lower cavity (5). The flow regulating mechanism (11) is used to control the gas flow rate. The flow regulating mechanism (11) is installed on the end of the valve body (2) away from the cut-off mechanism (10). The flow regulating mechanism (11) is equipped with a gas outlet (13) that is connected to the pressure regulating cavity. Its features are, The pressure regulating mechanism (6) includes: Pressure regulating valve core (61), the pressure regulating valve core (61) is located in the pressure regulating cavity and is slidably connected to the lower cover (15); A pressure regulating valve seat (62) is provided in the pressure regulating cavity and can be sealed with the pressure regulating valve core (61). The pressure regulating valve core (61) and the pressure regulating valve seat (62) form a pressure regulating valve opening. 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) can communicate with the air intake cavity (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), and the other end of the first pressure regulating spring (63) abuts against the inner wall of the lower cover (15). Pressure regulating valve stem (64), the pressure regulating valve stem (64) is connected to the pressure regulating valve core (61), the pressure regulating valve stem (64) extends into the lower cavity (5) of the diaphragm and abuts against the diaphragm assembly (3); Adjusting screw (65), which is threaded onto valve cover (1); A spring seat (66) is slidably installed in the upper cavity (4) of the diaphragm, and one end of the adjusting screw (65) extending into the upper cavity (4) of the diaphragm is connected to the spring seat (66). The second pressure regulating spring (67) has one end abutting against the spring seat (66) and the other end connected to the diaphragm assembly (3); The lower cover (15) has a bottom cavity (19) inside, 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 to the pressure regulating front cavity (16); The flow regulation mechanism (11) includes: Mounting housing (111) is mounted on the end of valve body (2) away from the shut-off mechanism (10), and a gas outlet (13) is mounted on the end of mounting housing (111) near valve body (2); Nozzle (112), the nozzle (112) is installed in the mounting housing (111) at one end near the valve body (2), and the inner cavity of the nozzle (112) is connected to the pressure regulating cavity (17); An outlet chamber (113) is formed between the outside of the nozzle (112) and the mounting housing (111). The outlet chamber (113) is connected to the gas outlet (13) and the upper cavity (4) of the diaphragm. A flow regulating port (114) is provided on the outer circumferential wall of the nozzle (112). Several flow regulating ports (114) are provided to connect the inner cavity of the nozzle (112) with the air outlet (113). The cross-sectional shape of the flow regulating port (114) is Y-shaped. A mandrel (115) is slidably disposed within a nozzle (112); A linear motor (116) is mounted inside a mounting housing (111) at one end away from the valve body (2), and the moving rod of the linear motor (116) is connected to a spindle (115). A controller (20) is mounted on a mounting housing (111) and is used to control the linear motor (116).

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

3. The proportional flow area valve according to claim 1, characterized in that, The cut-off mechanism (8) includes: The shut-off valve core (81) is slidably installed in the air intake chamber (7), and a shut-off spring chamber (9) is provided on the end of the shut-off valve core (81) away from the pressure regulating chamber. The stop valve seat (82) is located in the pressure regulating cavity and can be sealed with the stop valve core (81). The stop valve core (81) and the stop valve seat (82) form a stop valve opening. A stop spring (83) is installed in a stop spring cavity (9). One end of the stop spring (83) is connected to the inner wall of the stop spring cavity (9), and the other end of the stop spring (83) abuts against the cutting mechanism (10).

4. The proportional flow area valve according to claim 1, characterized in that, The cutting mechanism (10) includes: Cut-off housing (101), said cut-off housing (101) is installed on one end of valve body (2) located in air inlet chamber (7); A frame (102) is installed inside a cut-off housing (101); Cutting coil (103), said cutting coil (103) is wound around the outside of frame (102); Cut off the moving iron core (104), which is slidably installed inside the frame (102); A shut-off valve seat (105) is provided inside the frame (102) and can be sealed with the shut-off moving iron core (104). A shut-off valve opening is formed between the shut-off moving iron core (104) and the shut-off valve seat (105). Cut-off air inlet (106), the cut-off air inlet (106) is opened at one end of the cut-off housing (101), and the cut-off air inlet (106) passes through 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). The cut-off air inlet (106) can be connected to the cut-off spring cavity (9) through the opening of the cut-off valve. A cutting spring (107) is sleeved on the outside of the cutting moving iron core (104) and the cutting valve seat (105). One end of the cutting spring (107) is connected to the cutting moving iron core (104), and the other end of the cutting spring (107) is connected to the cutting valve seat (105). Cut-off air supply chamber (108), 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), the cut-off air supply chamber (108) can be connected to the cut-off air inlet (106) through the opening of the cut-off valve port, and the cut-off air supply chamber (108) is connected to the cut-off spring chamber (9). The movable block (109) is slidably installed in the cut-off air supply chamber (108) and connected to the cut-off moving iron core (104). A connecting cavity (110) is provided on the side of the movable block (109) away from the cut-off moving iron core (104). The connecting cavity (110) is connected to the lower cavity of the diaphragm (5). When the cut-off coil (103) is energized, the connecting cavity (110) is connected to the cut-off air supply chamber (108).

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