CN110005861B - Electromagnetic valve group for pressure control - Google Patents
Electromagnetic valve group for pressure control Download PDFInfo
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- CN110005861B CN110005861B CN201910412631.7A CN201910412631A CN110005861B CN 110005861 B CN110005861 B CN 110005861B CN 201910412631 A CN201910412631 A CN 201910412631A CN 110005861 B CN110005861 B CN 110005861B
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- 238000007789 sealing Methods 0.000 claims abstract description 26
- 229920001971 elastomer Polymers 0.000 claims abstract description 15
- 239000000806 elastomer Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 47
- 239000000696 magnetic material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 abstract description 2
- 230000001965 increasing effect Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses an electromagnetic valve group for pressure control, which comprises a base body, an exhaust valve body and an air charging valve body. The substrate is provided with a gas channel. The exhaust valve body is provided with an exhaust shell, an exhaust electromagnetic assembly, an exhaust valve clack and an exhaust elastomer, and is used for sealing or exhausting the gas of the gas channel; the inflation valve body is provided with an inflation shell, an inflation electromagnetic assembly, an inflation valve clack and an inflation elastomer, and is used for inflating pressure-regulating gas into the gas channel. In this way the pressure in the gas channel can be controlled. The gas channel is provided with a gas balance port, and the exhaust valve body and the inflation valve body are respectively provided with an exhaust balance port and an inflation balance port. The gas balance port is respectively communicated with the exhaust balance port and the inflation balance port through pipelines, and then the pressures at the three positions are equal. The exhaust valve clack and the inflation valve clack are additionally provided with a closing force, so that the exhaust valve clack can be closed by using smaller magnetic force, and the inflation valve clack can be closed by using smaller elastic force and opened by using smaller magnetic force under a certain design parameter.
Description
Technical Field
The invention relates to the technical field of pneumatic control, in particular to an electromagnetic valve group for controlling gas pressure.
Background
At present, gas pressure control can be realized through electromagnetic valves, and the electromagnetic valves are classified into 3 types in principle, namely a direct-acting electromagnetic valve, a pilot-operated electromagnetic valve and a step-by-step direct-acting electromagnetic valve.
When the direct-acting electromagnetic valve is electrified, the electromagnetic force lifts the closing member; when the power is off, the spring presses the closure member against the valve seat.
When the pilot electromagnetic valve is electrified, the electromagnetic force opens the pilot hole, and when the external pressure of the closing member is larger than the internal pressure, the closing member is pushed to open; when the power is off, the spring closes the pilot hole, and when the pressure in the closing member is larger than the external pressure, the closing member is pushed to close.
The step-by-step direct-acting electromagnetic valve is based on the principle of combining direct action and pilot action, and when the pressure difference between the inside and outside of the closing member is smaller or is 0, the pilot small valve and the main valve closing member are lifted by electromagnetic force after power is applied. When the pressure difference between the inside and the outside of the closing member is large, the principle is as a pilot type electromagnetic valve.
For the axial sealing structure, the three electromagnetic valves all need larger spring force to press the closing member, and the direct-acting electromagnetic valve also needs larger electromagnetic force to open the closing member; on the other hand, the pilot solenoid valve has a drawback in that the pressure control reaction is slow.
Disclosure of Invention
The invention provides an electromagnetic valve group, which can solve the problems that a valve is required to be opened or closed by using larger spring force or electromagnetic force at present and the reaction speed of a magnetic valve is low.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the electromagnetic valve group for pressure control comprises a base body, an exhaust valve body and an inflation valve body, wherein the exhaust valve body is provided with an exhaust shell, an exhaust electromagnetic assembly, an exhaust valve clack and an exhaust elastomer, the exhaust shell is arranged on the base body, an exhaust chamber is arranged between the exhaust shell and the base body, the base body is provided with a gas channel, an exhaust port and an external gas port, the gas channel is communicated with the exhaust chamber, and a connecting port between the exhaust chamber and the gas channel is a return gas port; the external gas port is arranged on the gas channel, and the gas outlet is communicated with the gas exhaust cavity; the exhaust electromagnetic assembly is positioned in the exhaust shell, the bottom end of the exhaust electromagnetic assembly is connected with the exhaust valve clack, and the exhaust valve clack can be controlled to seal the return air port; the exhaust elastic body is arranged in the gas channel, one end of the exhaust elastic body is fixed with the inner wall of the gas channel, the other end of the exhaust elastic body is fixedly connected with the exhaust valve clack, and the exhaust elastic body can drive the exhaust valve clack to open the return air port; the gas channel is internally provided with a gas balance port, one side of the top end of the exhaust electromagnetic assembly is provided with an exhaust balance port, and the exhaust balance port is communicated with the gas balance port through a pipeline;
the air charging valve body is arranged on the base body and communicated with the air channel.
Further, the inflation valve body comprises an inflation shell, an inflation electromagnetic assembly, an inflation valve clack and an inflation elastomer, wherein the inflation shell is arranged on the base body, an inflation cavity is arranged between the inflation shell and the base body, the inflation cavity is communicated with the gas channel, and a connection port between the inflation cavity and the gas channel is an air supply port; the base body is also provided with an inflation inlet which is communicated with the inflation cavity; the air charging valve clack is positioned in the air charging cavity; the inflation electromagnetic assembly is positioned in the inflation shell, the bottom end of the inflation electromagnetic assembly is connected with the inflation valve clack, and the inflation valve clack can be controlled to be far away from the air supply port; the inflatable elastic body is sleeved on the outer wall of the bottom of the inflatable shell, one end of the inflatable elastic body is connected with the inflatable shell, the other end of the inflatable elastic body is connected with the inflatable valve clack, and the inflatable elastic body can drive the inflatable valve clack to compress the air inlet; an inflation balance port is arranged on the inflation valve body and is positioned at one side of the top end of the inflation electromagnetic assembly; the inflatable balance port is communicated with the gas balance port through a pipeline.
Further, the exhaust electromagnetic assembly comprises an exhaust coil, an exhaust iron core and an exhaust valve flap piston, and the exhaust shell and the exhaust iron core are made of magnetic materials; the exhaust coil is fixed in the exhaust shell, and the exhaust iron core is arranged in the exhaust coil; an exhaust suction surface is arranged in the exhaust shell and used for driving the exhaust iron core; the bottom end of the exhaust iron core is provided with a clamping groove, the top of the exhaust valve clack piston is clamped into the clamping groove, and the bottom of the exhaust valve clack piston is fixedly connected with the exhaust valve clack; the exhaust iron core and the exhaust valve flap piston can drive the exhaust valve flap to seal the return air port.
Further, the exhaust electromagnetic assembly further comprises an exhaust balance piston which is arranged close to the exhaust balance port, and the bottom of the exhaust balance piston is fixedly connected with the top of the exhaust iron core; a valve adjusting pad is arranged between the exhaust balance piston and the exhaust iron core, and the valve adjusting pad is also arranged in the clamping groove.
Further, the device also comprises a piston cover and a balance membrane, wherein the piston cover is fixed on the exhaust shell, and the exhaust balance port is positioned on the piston cover; the balance diaphragm is flexible material, installs between exhaust casing and piston lid for sealed exhaust balance mouth.
Further, the device also comprises a return air port sealing ring, an exhaust diaphragm and an exhaust diaphragm pressing ring, wherein the return air port sealing ring and the exhaust diaphragm are made of flexible materials; the return air port sealing ring is sleeved on the return air port and is used for isolating the exhaust cavity from the air channel after the exhaust valve clack presses the return air port; the exhaust diaphragm clamping ring is connected to the bottom end of the exhaust shell, the exhaust diaphragm is arranged between the exhaust shell and the exhaust diaphragm clamping ring, and the exhaust diaphragm is also arranged between the exhaust valve clack and the exhaust valve clack piston and used for preventing gas from entering the exhaust shell.
In one embodiment, the inflation electromagnetic assembly comprises an inflation iron core and an inflation coil, and the inflation shell and the inflation iron core are made of magnetic materials; the inflatable coil is fixed in the inflatable shell, the inflatable iron core is positioned in the inflatable coil, and an inflatable suction surface is arranged in the inflatable shell and used for driving the inflatable iron core; the bottom end of the inflatable core is connected with the inflatable valve clack and can drive the inflatable valve clack to be far away from the air supply port.
Further, the inflation electromagnetic assembly comprises an inflation balance piston which is arranged close to the inflation balance port, and the bottom of the inflation balance piston is connected with the top of the inflation iron core.
Further, valve adjusting pads are arranged between the inflatable suction surface and the inflatable iron core and between the inflatable iron core and the inflatable valve flaps.
Further, the inflation valve body further comprises an air supply port sealing ring, an inflation iron core sealing ring, an inflation balance sealing ring and an inflation valve body sealing ring which are all made of flexible materials; the air supply port sealing ring is sleeved on the air supply port and used for isolating the air supply cavity from the air passage after the air supply port is pressed by the air supply valve clack; the inflatable core sealing ring is clamped between the outer wall of the inflatable core and the inner wall of the inflatable shell;
further, the inflation valve body sealing ring is clamped between the inflation shell and the base body, and the inflation balance sealing ring is clamped between the outer wall of the inflation balance piston and the inner wall of the inflation shell and is respectively used for preventing gas leakage in the inflation cavity and the inflation balance opening.
The beneficial effects of the invention are as follows:
1) The electromagnetic valve group is provided with the gas balance port and the exhaust balance port, so that partial pressures born by the upper end and the lower end of the exhaust valve clack are mutually offset, and for the existing electromagnetic valve, the electromagnetic force required by the exhaust valve clack of the electromagnetic valve group is smaller when the electromagnetic valve clack is closed;
2) The electromagnetic valve group is provided with the gas balance port and the gas filling balance port, so that partial pressures born by the upper end and the lower end of the gas filling valve clack are mutually offset, and for the existing electromagnetic valve, the electromagnetic force required by the gas filling valve clack of the electromagnetic valve group is smaller when the electromagnetic valve clack is opened; less spring force is required at closing.
Drawings
FIG. 1 is a perspective view of a solenoid valve block for pressure control;
FIG. 2 is a schematic diagram of a solenoid valve block for pressure control;
FIG. 3 is an enlarged view of a portion of area A of FIG. 2;
FIG. 4 is a schematic view showing a structure of an exhaust valve according to an embodiment of the present invention;
fig. 5 is a schematic structural view of an inflatable valve body according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings by means of specific embodiments. The following parts are non-magnetic materials unless specified to be magnetic materials.
As shown in fig. 1 to 5, an electromagnetic valve set for pressure control includes a base body 1, an exhaust valve body 2, and an inflation valve body 3. As shown in fig. 2, the exhaust valve body 2 includes an exhaust housing 21, an exhaust solenoid assembly 22, an exhaust valve flap 23, and an exhaust elastic body 24. The exhaust housing 21 is mounted on the base 1 with an exhaust chamber 25 between the base 1 and the exhaust housing. The base body 1 is provided with a gas passage 11, a gas outlet 12 and an external gas outlet 13. The gas passage 11 communicates with the exhaust chamber 25, and a connection port between the exhaust chamber 25 and the gas passage 11 is the return port 14. The external gas port 13 is arranged on the gas channel 11 and is communicated with a product chamber, and the product chamber is a chamber which needs pressure regulation of the next-stage controlled equipment. The gas in the product chamber is referred to as product gas. As shown in fig. 1, the exhaust port 12 communicates with the exhaust chamber 25 for exhausting the product gas. The product gas can enter the gas channel 11 through the external gas outlet 13, then enter the exhaust chamber 25 from the gas channel 11, and finally be discharged from the exhaust port 12 on the substrate 1.
The exhaust electromagnetic assembly 22 is located within the exhaust housing 21; the exhaust flap 23 is located within the exhaust chamber 25; the bottom end of the exhaust electromagnetic assembly 22 is connected with an exhaust valve clack 23; the exhaust solenoid assembly 22 may control the exhaust flap 23 to seal the return port 14. The exhaust elastic body 24 is installed in the gas passage 11; specifically, one end of the exhaust elastic body 24 is fixed on the inner wall of the gas channel 11, and the other end is fixedly connected with the exhaust valve flap 23; the elastic force of the exhaust elastic body 24 enables the exhaust valve clack 23 to be far away from the return port 14; thus, normally, the return air port 14 between the exhaust chamber 25 and the air passage 11 is in an unblocked state; when the air return opening 14 needs to be sealed, the exhaust electromagnetic assembly 22 drives the exhaust valve clack 23 to press the air return opening 14.
The gas passage 11 is provided with a gas balance port 15, and the exhaust valve body 2 is provided with an exhaust balance port 26 on the tip end side of the exhaust electromagnetic assembly 22. As shown in fig. 1, the exhaust balance port 26 communicates with the gas balance port 15 through the pipe 4. After the two are communicated, the pressure of the exhaust balance port 26 is as great as that of the gas channel 11, namely, the pressure born by the upper part of the exhaust electromagnetic assembly 22 (namely, the upper part of the exhaust valve clack 23) and the pressure born by the lower part of the exhaust valve clack 23 are opposite in direction and can be mutually offset.
Further, as shown in fig. 4, exhaust solenoid assembly 22 includes an exhaust coil 221, an exhaust core 222, and an exhaust valve flap piston 223. The exhaust coil 221 is fixed in the exhaust housing 21; the exhaust iron core 222 is installed in the middle of the exhaust coil 221. In the present embodiment, the exhaust coil 221 surrounds the exhaust core 222; the exhaust iron core 222 and the exhaust housing 21 are both made of magnetic materials, and the exhaust housing 21 is provided with an exhaust suction surface 211. When the exhaust coil 221 is energized, the exhaust iron core 222 and the exhaust housing 21 are attracted to each other by magnetization, and the exhaust suction surface 211 drives the exhaust iron core 222 to move in the direction of the return air port 14. A clamping groove 222a is formed in the bottom end of the exhaust iron core 222; when the machining precision is not high enough, the top of the exhaust valve clack piston 223 is clamped into the clamping groove 222a, and a valve adjusting pad 5 can be installed in the clamping groove 222a to adjust the gap between the exhaust iron core 222 and the exhaust suction surface 211 after the exhaust coil 221 is electrified, and if the gap is too large, the magnetic force is insufficient to enable the exhaust valve clack 23 to seal the air return port 14; if the exhaust iron core 222 moves downwards to be closely attached to the exhaust suction surface 211, the exhaust valve clack 23 cannot move in place, and the return air port 14 cannot be pressed; and the close proximity of the vent core 222 to the vent housing 21 is also detrimental to rapid degaussing. The bottom of the exhaust valve flap piston 223 is fixedly connected with the exhaust valve flap 23. After the exhaust coil 221 is electrified, the exhaust iron core 222 and the exhaust valve clack piston 223 can drive the exhaust valve clack 23 to press the return air port 14; after the exhaust coil 221 is powered off, since a nonmagnetic medium, in this embodiment air, is provided between the exhaust iron core 222 and the exhaust housing 21, demagnetization can be performed quickly.
The exhaust solenoid assembly 22 further includes an exhaust balance piston 27 and a piston cap 28 disposed adjacent the exhaust balance port 26; the bottom of the exhaust balance piston 27 is fixedly connected with the top of the exhaust iron core 222, and a valve adjusting pad 5 is arranged between the exhaust balance piston and the exhaust iron core. A piston cover 28 is fixed on the exhaust housing 21, and the exhaust balance port 26 is located on the piston cover 28, and the piston cover 28 can block the exhaust balance piston 27 from moving outside the exhaust housing 21; between the discharge housing 21 and the piston cover 28, a balancing diaphragm 271 is interposed, and the balancing diaphragm 271 is made of a flexible material. The balance diaphragm 271 can prevent gas leakage from the exhaust balance port 26, and ensure the sealing performance of the exhaust balance port 26.
To further ensure that the exhaust flap 23 seals the return port 14, and also to ensure that the exhaust chamber 25 is isolated from the interior of the exhaust housing 21, the exhaust valve body 2 further includes a return port seal 141, an exhaust diaphragm 29, and an exhaust diaphragm pressure ring 291. The return port seal 141 and the exhaust diaphragm 29 are made of flexible materials. As shown in fig. 2, the return air port seal 141 is fixed to the return air port 14, and when the exhaust valve flap 23 is pressed against the return air port 14, the exhaust valve flap 23 can seal the return air port seal 141, thereby isolating the exhaust chamber 25 from the air passage 11. As shown in fig. 3, a vent diaphragm pressing ring 291 is connected to the bottom end of the vent housing 21, and a vent diaphragm 29 is installed between the vent housing 21 and the vent diaphragm pressing ring 291, and the vent diaphragm 29 is also sandwiched between the vent valve flaps 23 and the vent valve flap piston 223 for preventing product gas from entering the inside of the vent housing 21.
The height of the exhaust balance piston 27, the exhaust iron core 222, the exhaust valve flap piston 223 and the exhaust valve flap 23 after being connected is smaller than the distance between the air return port 14 and the balance diaphragm 271, namely, the exhaust valve flap 23 can move a certain distance relative to the air return port 14, so that the exhaust flow can be adjusted by adjusting the stroke of the exhaust valve flap 23. In the present embodiment, as shown in fig. 4, after the valve adjustment pad 5 is installed between the exhaust balance piston 27 and the exhaust iron core 222, the stroke of the exhaust valve flap 23 is relatively reduced, and the exhaust flow rate of the return air port 14 is also reduced. In other embodiments, the number of valve adjusting pads 5 may be increased or decreased accordingly according to the actual requirement, so as to change the exhaust flow rate of the return air port 14.
An electromagnetic valve group for pressure control is provided, an inflation valve body 3 is arranged on a base body 1, and the inflation valve body 3 is communicated with a gas channel 11. As shown in fig. 1 and 5, the inflation valve body 3 includes an inflation housing 31, an inflation electromagnetic assembly 32, an inflation valve flap 33, and an inflation elastic body 34, and the inflation housing 31 is mounted on the base body 1. The inflatable shell 31 and the base body 1 are provided with an inflatable cavity 35, the inflatable cavity 35 is communicated with the gas channel 11, a connecting port between the inflatable cavity 35 and the gas channel 11 is an air supply port 16, as shown in fig. 1, the base body 1 is provided with an inflatable port 17, the inflatable port 17 is communicated with the inflatable cavity 35, pressure-regulating gas is filled into the inflatable cavity 35 through the inflatable port 17, and the pressure-regulating gas is working gas for pressure control of the electromagnetic valve set. After entering the inflation chamber 35, the pressure-regulated gas enters the gas passage 11 through the gas supply port 16. The inflating valve clack 33 is located in the inflating chamber 35, the inflating electromagnetic assembly 32 is installed inside the inflating shell 31, and the bottom end of the inflating electromagnetic assembly 32 is connected with the inflating valve clack 33 and can control the inflating valve clack 33 to be far away from the air supply port 16. The inflatable elastic body 34 is sleeved on the outer wall of the bottom of the inflatable shell 31, one end of the inflatable elastic body is connected with the inflatable shell 31, and the other end of the inflatable elastic body is fixedly connected with the inflatable valve 33. Normally, the pressure-adjusting gas is filled into the chamber 35 through the charging port 17, the pressure of the charging elastic body 34 and the pressure-adjusting gas enable the charging valve clack 33 to press the air charging port 16, and at this time, the pressure-adjusting gas in the charging chamber 35 cannot enter the gas channel 11 through the air charging port 16. The inflating valve body 3 further comprises an inflating balance port 36, the inflating balance port 36 is arranged at one side of the top end of the inflating electromagnetic valve assembly 32, the inflating balance port 36 is communicated with the air balance port 15 through the pipeline 4, at this time, the pressure of the inflating balance port 36 and the pressure of the air balance port 15 are the same, that is, the pressure born by the upper side of the inflating electromagnetic assembly 32 (that is, the upper side of the inflating valve clack 33) and the pressure born by the inflating valve clack 33 at the air supply port 16 are opposite in direction, and can be offset.
Further, as shown in fig. 5, the inflation electromagnetic assembly 32 includes an inflation coil 321 and an inflation core 322, the inflation coil 321 is fixed in the inflation housing 31, the inflation core 322 is located in the middle of the inflation coil 321, and in this embodiment, the inflation coil 321 surrounds the inflation core 322. The bottom end of the air charge core 322 is connected to the air charge flap 33. The air core 322 and the air shell 31 are both made of magnetic materials. The inside of the inflation casing 31 is provided with an inflation suction surface 311, when the inflation coil 321 is electrified, the inflation core 322 and the inflation casing 31 are mutually attracted due to magnetization, the inflation suction surface 311 drives the inflation core 322 to move away from the air inlet 16, and in the process, the inflation core 322 drives the inflation valve clack 33 to be away from the air inlet 16. The inflation electromagnetic assembly 32 further comprises an inflation balance piston 37 disposed close to the inflation balance port 36, the inflation balance port 36 is located above the inflation balance piston 37, and the bottom of the inflation balance piston 37 passes through the through hole of the inflation housing 31 and is connected with the top of the inflation core 322, so that the inflation core 322 is blocked by the inflation suction surface 311 of the inflation housing 31 after moving to a certain distance away from the air supply port 16, and cannot move continuously.
The inflation valve body 3 further includes an air bleed seal 161, as shown in fig. 2, the air bleed seal 161 is sleeved over the air bleed 16, and the inflation valve flap 33 is capable of compressing the air bleed seal 161 to isolate the air bleed 16 from the inflation chamber 35. On the other hand, in order to prevent leakage of gas in the inflation chamber 35 and the inflation balance port 36, the inflation valve body 3 further includes an inflation core seal 322a, an inflation valve body seal 38, and an inflation balance seal 39 in this embodiment. As shown in fig. 5, the air core seal 322a is sandwiched between the outer wall of the air core 322 and the inner wall of the air housing 31, preventing the gas in the air chamber 35 from entering the inside of the air housing 31. As shown in fig. 2 and 5, the inflation valve body seal 38 is sandwiched between the inflation housing 31 and the base body 1, and the inflation balance seal 39 is sandwiched between the outer wall of the inflation balance piston 37 and the inner wall of the inflation housing 31.
The height of the air core 322 after being connected with the air valve flap 33 is smaller than the distance between the air inlet 16 and the blocking surface 311 of the air housing 31, i.e. the air valve flap 33 can move a certain distance relative to the air inlet 16, so that the air flow can be adjusted by adjusting the stroke of the air valve flap 33, and in this embodiment, a valve adjusting pad 5 is arranged between the air suction surface 311 and the air core 322 for quick degaussing. A valve adjusting pad 5 is also installed between the air charging core 322 and the air charging valve 33, and the stroke of the air charging valve 33 can be adjusted by increasing or decreasing the number of the valve adjusting pads 5 between the air charging core 322 and the air charging valve 33, so as to adjust the air charging flow.
In one embodiment, as shown in FIG. 1, gas balance port 15 has a first gas balance port 151 and a second gas balance port 152, with first gas balance port 151 disposed adjacent to plenum 16 and in communication with plenum balance port 36 and second gas balance port 152 disposed adjacent to return air port 14 and in communication with exhaust balance port 26. In other embodiments, the first gas balance port 151, the second gas balance port 152, and the external gas port may be provided as the same port. In one embodiment, the charge and discharge elastomers 34, 24 are each cylindrical helical compression springs.
A workflow of a solenoid valve set for pressure control (for example pressurizing a product gas):
normally, the air charging valve clack 33 presses the air inlet 16 under the action of the air charging elastomer 34, and the exhaust valve clack 23 is far away from the air return opening 14 under the action of the exhaust elastomer 24.
When pressure needs to be applied, in the first step, an exhaust coil 221 in the exhaust valve body 2 is electrified, and an exhaust iron core 222 and an exhaust valve flap piston 223 drive an exhaust valve flap 23 to compress and seal the return air port 14; a second step of simultaneously electrifying an air charging coil 321 in the air charging valve body 3, enabling an air charging iron core 322 to drive an air charging valve clack 33 to be far away from an air feeding port 16, enabling an air charging port 17 to be connected with pressure-regulating gas, enabling the pressure-regulating gas to enter a gas channel 11 through an air charging chamber 35 and the air feeding port 16 in sequence, enabling part of the pressure-regulating gas to enter a first gas balance port 151 and a second gas balance port 152 respectively, enabling the pressure intensity of the first gas balance port 151 to be equal to that of an air charging balance port 36 at the moment, and enabling the pressure intensity of the second gas balance port 152 to be equal to that of an air discharging balance port 26; third, after the pressure of the gas channel reaches the target pressure value, the gas-filled coil 321 is powered off, and the gas-filled valve clack 33 is compressed again under the action of the gas-filled elastomer 34 and the pressure-regulating gas and seals the gas-feeding port 16; fourth, under certain conditions, if the product uses the product gas with the target air pressure value to complete the task, the exhaust coil 221 is powered off, the exhaust elastic body 24 pushes the exhaust valve clack 23 to be far away from the return air port 14, and the product gas sequentially passes through the external air port 13, the air channel 11, the return air port 14, the exhaust chamber 25 and the exhaust port 12 to be exhausted out of the electromagnetic valve group, so that the normal state is restored.
A solenoid valve assembly for pressure control is provided, through setting up gas balance mouth and the exhaust balance mouth of intercommunication for the lower extreme of discharge valve lamella and the pressure that the upper end received on the exhaust balance piston are equal. Then, an additional closing force is added to the exhaust flap compared to the direct-acting solenoid valve, so that the exhaust valve can close and seal the return port with a smaller electromagnetic force. Because the air pressure born by the exhaust valve clack is related to the difference value of the stress areas of the lower end of the exhaust valve clack and the upper end of the exhaust balance piston, the air pressure is unrelated to the stress area of the air pressure clack; therefore, the stress area of the lower end of the exhaust valve clack can be increased, namely the caliber of the air return opening is increased, so that the exhaust flow is increased. On the other hand, the invention also provides the air charging valve body, the air charging valve body can control the pressure regulating air to enter the air channel, and the air pressure of the product is controlled, compared with the delay waiting time required by the prior pilot electromagnetic valve, the invention can rapidly improve the air pressure control reaction speed of the whole electromagnetic valve group, thereby obviously enhancing the working efficiency of the electromagnetic valve group; the invention also provides an air charging balance port above the air charging valve body, the air charging balance port is communicated with the air charging balance port, so that the pressure intensity received by the lower end of the air charging valve flap and the upper end of the air charging balance piston are equal, and compared with a direct-acting electromagnetic valve, an extra closing force is added on the air charging valve flap, so that the air charging elastomer can close and seal the air charging port by using smaller elastic force, and the air charging valve body can open the air charging port by using relatively smaller electromagnetic force through designing the stress area difference value of the air charging valve flap from the air charging port and the air charging balance piston from the air charging balance port. Because the air pressure received by the air valve clack is related to the difference value of the stress areas of the lower end of the air valve clack and the upper end of the air balance piston, the air valve clack is irrelevant to the stress area of the air valve clack; therefore, the stress area of the lower end of the air charging valve clack can be increased, namely the caliber of the air sending port is increased, so that the air charging flow is increased.
According to the electromagnetic valve assembly, through the arrangement of the valve adjusting pad, the moving distance of the inflating valve clack relative to the air supply port and the moving distance of the exhaust valve clack relative to the return port can be adjusted, so that the inflating flow and the exhaust flow of the electromagnetic valve assembly can be adjusted, and the flow range is wider.
The foregoing is a further detailed description of the invention in connection with specific embodiments, and it is not intended that the invention be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the invention.
Claims (5)
1. An electromagnetic valve group for pressure control, characterized in that: the exhaust valve comprises a base body, an exhaust valve body and an inflation valve body, wherein the exhaust valve body is provided with an exhaust shell, an exhaust electromagnetic assembly, an exhaust valve clack and an exhaust elastomer, the exhaust shell is arranged on the base body, an exhaust cavity is arranged between the exhaust shell and the base body, the base body is provided with a gas channel, an exhaust port and an external gas port, the gas channel is communicated with the exhaust cavity, and a connection port between the exhaust cavity and the gas channel is a gas return port; the external gas outlet is arranged on the gas channel, and the gas outlet is communicated with the gas exhaust cavity;
the exhaust electromagnetic assembly is positioned in the exhaust shell, the bottom end of the exhaust electromagnetic assembly is connected with the exhaust valve clack, and the exhaust valve clack can be controlled to seal the air return port; the exhaust elastomer is arranged in the gas channel, one end of the exhaust elastomer is fixed with the inner wall of the gas channel, the other end of the exhaust elastomer is fixedly connected with the exhaust valve, and the exhaust elastomer can drive the exhaust valve to open the air return port;
the gas channel is internally provided with a gas balance port, one side of the top end of the exhaust electromagnetic assembly is provided with an exhaust balance port, and the exhaust balance port is communicated with the gas balance port through a pipeline;
the inflation valve body is arranged on the base body and communicated with the gas channel;
the inflation valve body comprises an inflation shell, an inflation electromagnetic assembly, an inflation valve clack and an inflation elastomer, wherein the inflation shell is arranged on the base body, an inflation cavity is arranged between the inflation shell and the base body, the inflation cavity is communicated with the gas channel, and a connection port between the inflation cavity and the gas channel is an air supply port; the base body is also provided with an inflation inlet which is communicated with the inflation cavity;
the inflation valve flap is positioned in the inflation chamber; the inflation electromagnetic assembly is positioned in the inflation shell, the bottom end of the inflation electromagnetic assembly is connected with the inflation valve flap, and the inflation valve flap can be controlled to be far away from the air supply port; the inflatable elastic body is sleeved on the outer wall of the bottom of the inflatable shell, one end of the inflatable elastic body is connected with the inflatable shell, the other end of the inflatable elastic body is connected with the inflatable valve clack, and the inflatable elastic body can drive the inflatable valve clack to compress the air supply port;
the inflation valve body is provided with an inflation balance port, and the inflation balance port is positioned at one side of the top end of the inflation electromagnetic assembly; the gas balance port is communicated with the gas balance port through a pipeline;
the exhaust electromagnetic assembly comprises an exhaust coil, an exhaust iron core and an exhaust valve flap piston, and the exhaust shell and the exhaust iron core are made of magnetic materials; the exhaust coil is fixed in the exhaust shell, and the exhaust iron core is arranged in the exhaust coil; an exhaust suction surface is arranged in the exhaust shell and used for driving the exhaust iron core; the bottom end of the exhaust iron core is provided with a clamping groove, the top of the exhaust valve flap piston is clamped into the clamping groove, and the bottom of the exhaust valve flap piston is fixedly connected with the exhaust valve flap; the exhaust iron core and the exhaust valve flap piston can drive the exhaust valve flap to seal the air return port;
the exhaust electromagnetic assembly further comprises an exhaust balance piston arranged close to the exhaust balance port, and the bottom of the exhaust balance piston is fixedly connected with the top of the exhaust iron core; a valve adjusting pad is arranged between the exhaust balance piston and the exhaust iron core, and a valve adjusting pad is also arranged in the clamping groove;
the exhaust balance port is positioned on the piston cover; the balance diaphragm is made of flexible materials, is arranged between the exhaust shell and the piston cover and is used for sealing the exhaust balance port;
the exhaust valve body further comprises an air return port sealing ring, an exhaust diaphragm and an exhaust diaphragm pressing ring, and the air return port sealing ring and the exhaust diaphragm are made of flexible materials; the air return port sealing ring is sleeved on the air return port and is used for isolating the exhaust cavity from the air channel after the exhaust valve flaps compress the air return port;
the exhaust diaphragm clamping ring is connected to the bottom end of the exhaust shell, the exhaust diaphragm is installed between the exhaust shell and the exhaust diaphragm clamping ring, and the exhaust diaphragm is also installed between the exhaust valve clack and the exhaust valve clack piston and used for preventing gas from entering the exhaust shell.
2. The solenoid valve group for pressure control of claim 1, wherein: the inflation electromagnetic assembly comprises an inflation iron core and an inflation coil, and the inflation shell and the inflation iron core are made of magnetic materials; the inflatable coil is fixed in the inflatable shell, the inflatable iron core is positioned in the inflatable coil, and an inflatable suction surface is arranged in the inflatable shell and used for driving the inflatable iron core; the bottom end of the inflatable core is connected with the inflation valve flap and can drive the inflation valve flap to be far away from the air supply port.
3. The solenoid valve group for pressure control of claim 2, wherein: the inflatable electromagnetic assembly further comprises an inflatable balance piston arranged close to the inflatable balance opening, and the bottom of the inflatable balance piston is connected with the top of the inflatable iron core.
4. The solenoid valve group for pressure control of claim 2, wherein: valve adjusting pads are arranged between the inflatable suction surface and the inflatable iron core and between the inflatable iron core and the inflatable valve flaps.
5. A solenoid valve group for pressure control according to any one of claims 2-4, wherein: the inflation valve body further comprises an air supply port sealing ring, an inflation iron core sealing ring, an inflation balance sealing ring and an inflation valve body sealing ring which are all made of flexible materials; the air supply port sealing ring is sleeved on the air supply port and is used for isolating the air supply cavity from the air channel after the air supply port is pressed by the air supply valve flap; the inflatable core sealing ring is clamped between the outer wall of the inflatable core and the inner wall of the inflatable shell;
the inflation valve body sealing ring is clamped between the inflation shell and the base body, and the inflation balance sealing ring is clamped between the outer wall of the inflation balance piston and the inner wall of the inflation shell and is respectively used for preventing gas leakage in the inflation cavity and the inflation balance opening.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910412631.7A CN110005861B (en) | 2019-05-17 | 2019-05-17 | Electromagnetic valve group for pressure control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910412631.7A CN110005861B (en) | 2019-05-17 | 2019-05-17 | Electromagnetic valve group for pressure control |
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| CN110005861A CN110005861A (en) | 2019-07-12 |
| CN110005861B true CN110005861B (en) | 2024-01-02 |
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| CN209909272U (en) * | 2019-05-17 | 2020-01-07 | 深圳市苍泰科技有限公司 | Electromagnetic valve set for pressure control |
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| CN102109049A (en) * | 2011-03-14 | 2011-06-29 | 宁波三安制阀有限公司 | Bottle valve |
| JP2015075227A (en) * | 2013-10-11 | 2015-04-20 | 株式会社鷺宮製作所 | Electromagnetic control valve |
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|---|---|
| CN110005861A (en) | 2019-07-12 |
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