CN113915390B - Automatic drain valve based on membrane structure - Google Patents
Automatic drain valve based on membrane structure Download PDFInfo
- Publication number
- CN113915390B CN113915390B CN202111106456.2A CN202111106456A CN113915390B CN 113915390 B CN113915390 B CN 113915390B CN 202111106456 A CN202111106456 A CN 202111106456A CN 113915390 B CN113915390 B CN 113915390B
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- China
- Prior art keywords
- valve casing
- filter screen
- valve
- filter element
- automatic drain
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- 239000012528 membrane Substances 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 38
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 229910021389 graphene Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 description 16
- 238000007789 sealing Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
-
- 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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses an automatic drain valve based on a membrane structure, which comprises a valve casing, a filter screen device and a composite filter element, wherein the valve casing is of a sleeve structure with one end open, the filter screen device and the composite filter element are sequentially arranged in the valve casing from the inside to the outside, a protective cover is arranged at the open end of the valve casing, and water holes are formed in the closed end of the valve casing and the protective cover. Compared with the prior art, the utility model has the advantages of easy assembly, lower cost, simple and convenient use and good stability.
Description
Technical Field
The utility model relates to the field of automatic drain valves, in particular to an automatic drain valve based on a membrane structure.
Background
Compressed air is a common power source and is indispensable in industries such as industry, transportation industry and the like. But condensed water in the compressed air may damage the production, equipment using the compressed gas, such as air compressors, meters, power actuators, etc. The small air compressor has the advantages of high energy consumption, unstable output, easy damage and the like caused by water storage of the air tank. The air cylinders in the brake system of the large-sized vehicle can reduce the air storage capacity due to water storage, so that potential safety hazards are caused. The water in the compressed air storage tank must be drained away in time.
At present, all air compressor air tanks, compressed air conveying pipelines of large factories and various devices with compressed air inside are provided with drainage devices, and the drainage devices are divided into manual and automatic devices. Compared with manual drainage, manual and automatic drainage is saved, the drainage effect is stable, and the failure probability of equipment is reduced.
In many of the existing automatic drain valves, the automatic drain valve is of a mechanical structure and needs to be controlled. For example, the automatic drain valve described in patent CN 110657243A is an automatic drain valve controlled by using compressed air as a power source and using an electromagnetic valve, and is an automatic valve with compact structure and good drain effect. Patent CN 107650902A describes an automatic drain for a large bus brake system, which can be controlled using the electric control system of the car. Patent CN 108278407A is an automatic drain valve for draining trains or high-speed rail air cylinders, which realizes automatic drainage without control, and the structure of up to 40 parts is complex, but the matching is precise, and the automatic drain valve is called an industrial art. These automatic valves have in common that they all employ a mechanical action mechanism to control the flow of water. In addition, there are many patents of utility models related to automatic drain valves, such as CN 205639735U, CN 205806590U, etc., which also avoid the use of action parts such as springs, floats, etc., which control the "on-off" of the water flow, still remain on a macroscopic scale.
The automatic drain valve with the mechanical structure is highly favored by users, although the automatic drain valve can maintain good drain effect. However, the wide use of automatic drain valves is limited by the cost problems caused by complex structure, numerous parts, difficult maintenance and repair, etc. And the action mechanism inevitably causes abrasion in the long-time movement process, and the matching state among parts can be possibly changed, so that the drainage is influenced.
Therefore, an automatic drain valve that is simple in structure, few in parts, and low in cost may improve this situation.
Disclosure of Invention
In view of the above-mentioned current situation, the present utility model provides an automatic drain valve based on a membrane structure for draining compressed air storage equipment, so that the drain valve realizes automatic drain without control, avoids the use of a mechanical action mechanism, and controls water flow in a micro-scale or nano-scale structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides an automatic drain valve based on membrane structure, includes valve casing, filter screen device, compound filter core, the valve casing is one end open-ended sleeve structure, is equipped with filter screen device and compound filter core in proper order from outside in the valve casing, the visor is installed to the open end of valve casing, the blind end of valve casing and visor all are equipped with the water hole.
As a further preferred embodiment, the closed end of the valve housing has external threads for connection to external equipment.
As a further preferable scheme, a plurality of positioning rings and rubber rings are further arranged in the valve casing, and the positioning rings, the rubber rings, the filter screen device, the rubber rings, the positioning rings, the rubber rings, the composite filter element, the rubber rings and the positioning rings are sequentially arranged in the valve casing from inside to outside.
As a further preferable scheme, the inner wall of the valve casing is provided with internal threads, and the peripheries of the filter screen device, the composite filter element and the positioning ring are provided with external threads meshed with the internal threads.
As a further preferable scheme, the filter screen device is a blind plate with a siphon device, the siphon device comprises a siphon pipe and a vent pipe, the siphon pipe and the vent pipe penetrate through the blind plate, external threads meshed with the inner wall of the valve casing are arranged on the periphery of the blind plate, one end of the siphon pipe between the blind plate and the closed end of the valve casing is a bent pipe, a pipe orifice of the siphon pipe faces the blind plate, and the filter screen is arranged on the pipe orifice.
As a further preferred embodiment, the filter screen is 10 mm from the blind plate.
As a further preferred embodiment, the filter device is a filter screen.
As a further preferred embodiment, the composite filter element comprises a metal base, a functionalized graphene film and a sand core, wherein the functionalized graphene film and the sand core are positioned in the metal base, and the sand core is positioned on one side of the open end of the valve casing.
As a further preferable scheme, the sand core and the metal base are sealed by waterproof glue, a microporous filter membrane is covered on the surface of the sand core, and the functionalized graphene composite membrane is positioned on the microporous filter membrane.
As a still further preferred embodiment, the pore size of the microporous filter membrane is 0.1. 0.1 um, and the loading of the functionalized graphene composite membrane is about 100 g per square meter.
Compared with the prior art, the utility model is an automatic drain valve for realizing drainage without using a mechanical structure, and has the remarkable advantages that:
(1) easy to manufacture. All parts have simple structures and are easy to produce in batches; the total number of parts is small, and the assembly is easy.
(2) The cost is lower. Besides the functionalized graphene, other special materials are not needed, and the composite filter element can realize the functions of the functionalized graphene by only a few milligrams.
(3) The use is simple and convenient. The valve body adopts threaded connection with the gas pitcher, is equipped with hexagonal structure outside the valve casing, easy to assemble, can realize automatic drainage after the installation.
(4) The stability is good. The movable parts are not contained, and the damage is not easy to occur; the graphene has stable properties, and is beneficial to prolonging the service life and expanding the use scene; the water flux is high, and the water can be drained in time.
Drawings
FIG. 1 is a schematic diagram of the components of the present utility model;
FIG. 2 is a schematic diagram of the general assembly of the present utility model;
FIG. 3 is a schematic view of the blind plate structure of the present utility model;
FIG. 4 is a schematic diagram of a composite filter element according to the present utility model;
fig. 5 is a schematic structural diagram of a functionalized graphene film layer during water drainage and gas barrier.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
An automatic drain valve based on a membrane structure, comprising:
as shown in fig. 1, the automatic drain valve consists of a valve casing 1, a filter screen device 2, a composite filter element 3, a sealing ring and a positioning ring 4 (outer nut).
The valve casing 1 is a cylindrical structure, the end part is provided with a water hole, and the inside is provided with internal threads for installing and fixing other parts. The inside of the filter screen device is sequentially provided with the filter screen device 2 and the composite filter element 3 from top to tail (auxiliary components such as a positioning ring 4 are not described here); the top end is provided with external threads for connecting equipment needing drainage; the tail part is provided with a protective cover 5 for protecting internal parts; the outside of the valve casing 1 is provided with a hexagonal structure, so that the valve casing is convenient to assemble and disassemble, and a small hole for draining water is formed in the center of the protective cover 5.
The assembly of all the parts of the present utility model patent is shown in figure 2. The external thread on the valve shell is used for being connected with an air storage tank or equipment needing to drain water, and the external thread on the protective cover is used for being connected with the valve shell; the blind plate or the filter screen with the siphon device, the positioning ring and the composite filter element are arranged in the valve casing through threads, and the rubber ring for sealing is not shown in the figure; all threads have the same inner diameter, outer diameter and thread depth, and are beneficial to the serial installation of a plurality of valve bodies.
The filter screen device 2 is a blind plate 21 or a filter screen with a siphon device, and the siphon device is shown in fig. 3, and a siphon tube 22 and a breather tube 23 are arranged on the blind plate 21. The siphon device is used for intercepting large particles such as rust and the like, preventing the composite membrane from being damaged, and can be replaced by a filter screen. The siphon water suction port is also provided with a filter screen 24 to prevent large particles from blocking the siphon.
The composite filter element 3 is a main functional part, and the composite filter element 3 consists of a metal base 51 (permeable), a sand core 53 and a functionalized graphene composite membrane 52, and the structural schematic diagram of the composite filter element is shown in fig. 4. The metal base is used for supporting the sand core, and the sand core is used for supporting the functionalized graphene composite film. During preparation, a sand core is placed on the metal base, a microporous filter membrane is placed on the sand core, and the edge is sealed by using a rubber ring or sealant. Dispersing a certain amount of functionalized graphene in water, loading hydroxylamine functionalized graphene on a microporous filter membrane by adopting a suction filtration method, and sealing the edge again.
As shown in the left side of fig. 5, when water exists, the lamellar graphene is not easy to disperse in water due to the large lamellar area of the functionalized graphene, hydrophilic hydroxyl groups exist on the surface of the functionalized graphene, water easily enters into the interlayer, and an interlayer channel is formed, so that water molecules can pass through. When no water is present, as shown in fig. 5, the layered structure is tightly stacked under the action of air pressure, resulting in an airtight structure thanks to the excellent mechanical properties of graphene.
The sealing ring and the positioning ring 4 are used for sealing and positioning respectively. All parts are connected and fixed inside the valve housing 1 by threads, and no movable parts exist.
Example 1.
According to the assembled automatic drain valve shown in fig. 2, a valve shell is made of cast copper, and the nominal diameter of an internal thread and an external thread is DN15. And a positioning ring, a rubber ring, a filter screen, a rubber ring, a positioning ring, a rubber ring, a composite filter element, a rubber ring and a positioning ring are sequentially arranged in the valve casing, and finally a protective cover is arranged.
Wherein, the metal base of holding ring and compound filter core is cast copper material, and the filter screen is plastics material.
The manufacturing process of the composite filter element is as follows: and installing a sand core on the metal base, and sealing a gap between the sand core and the metal base by using waterproof glue. And covering the sand core with a microporous filter membrane, wherein the diameter of the microporous filter membrane is slightly larger than that of the sand core. And loading the functionalized graphene on the microporous filter membrane through suction filtration to form a composite filter membrane, and sealing the edge position of the composite filter membrane by using waterproof glue. And (5) manufacturing the composite filter element.
Parameters of the composite filter element: PE microporous filter membrane (pore size 0.1 um), functionalized graphene loading is about 100 g per square meter.
The automatic drain valve is directly arranged at the drain outlet at the bottom of a gas storage tank of a small air compressor through external threads at the top end. When vapor is condensed on the inner wall of the gas tank, the formed condensed water downwards flows through the filter screen to remove particulate matters such as rust, and the like, and after flowing to the composite filter membrane, the functionalized graphene membrane layer allows water to pass through, and after the water passes through, the functionalized graphene membrane layer recovers an airtight structure, so that the aim of draining and blocking gas is fulfilled.
The air tank reserves of the small air compressor are 0.6 and m n, the driving mode is motor driving, the air storage pressure is 0.6 Mpa, and the air consumption period is 40 minutes.
Before the drain valve of the utility model is installed, the air storage tank uses a manual mechanical drain valve to drain water. The water is discharged once every 10 days, the water is not discharged more than 10 days, the air compressor needs to be additionally inflated once in one air utilization period, for example, the water is not discharged more than 15 days, and the air storage capacity and the pressure of the air compressor cannot meet the single consumption of air utilization equipment. After the drain valve is installed, the air compressor in the air utilization period does not need to be additionally inflated; after 30 days, the drain valve is removed, and no extra water flows out from the air storage tank.
Example 2.
According to the assembled automatic drain valve shown in fig. 2, a valve shell is made of cast copper, the nominal diameter of internal and external threads is DN25, a positioning ring, a rubber ring, a siphon device, a rubber ring, a positioning ring, a rubber ring, a composite filter element, a rubber ring and a positioning ring are sequentially arranged in the valve shell, and finally a protective cover is arranged.
Wherein, the metal base of holding ring and compound filter core is cast copper material, and the siphon device is plastics material.
The manufacturing process of the composite filter element is as follows: and installing a sand core on the metal base, and sealing a gap between the sand core and the metal base by using waterproof glue. And covering the sand core with a microporous filter membrane, wherein the diameter of the microporous filter membrane is slightly larger than that of the sand core. And loading the functionalized graphene on the microporous filter membrane through suction filtration to form a composite filter membrane, and sealing the edge position of the composite filter membrane by using waterproof glue. And (5) manufacturing the composite filter element.
Parameters of the composite filter element: PE microporous filter membrane (pore size 0.1 um), functionalized graphene loading is about 60 g per square meter.
The siphon water inlet of the siphon device is provided with a filter screen, the water suction port is about 10 mm from the blind plate, and the highest position of the siphon elbow is about 50 mm from the blind plate.
The automatic drain valve is directly arranged at the drain outlet at the bottom of a gas storage tank of a medium-sized air compressor through external threads at the top end. When water vapor condenses on the inner wall of the gas tank, the formed condensed water flows downwards to the siphon device, and liquid water is accumulated in the siphon device due to the blocking of the blind plate. When the water surface exceeds the highest position of the siphon pipe, the siphon is generated, and the filter screen at the pipe orifice of the siphon pipe can block particulate matters from entering the siphon pipe. After siphoning, the particles attached to the filter screen under the water flow can sink to the blind plate under the action of gravity, so that the blocking caused by the particles and the damage to the functionalized graphene composite membrane are prevented. After the liquid water flows to the composite filter membrane, the functionalized graphene membrane layer allows the water to pass through, and after the water passes through, the functionalized graphene membrane layer recovers the airtight structure, so that the aim of draining and blocking air is fulfilled.
The gas tank reserves of the medium-sized air compressor are 3.2 and m, the driving mode is motor driving, the gas storage pressure is 0.5 Mpa, and the gas consumption period is 80 minutes.
Before the drain valve of the utility model is installed, the air storage tank uses a manual mechanical drain valve to drain water. Every 5 days, water is discharged once, more than 8 days, water is not discharged, the air compressor needs to be additionally inflated once in one air utilization period, for example, water is not discharged for more than 15 days, and the air storage capacity and the pressure of the air compressor cannot meet the single consumption of air utilization equipment. After the drain valve is installed, the air compressor in the air utilization period does not need to be additionally inflated; after 30 days, the drain valve is removed, and no extra water flows out from the air storage tank.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (3)
1. Automatic drain valve based on membrane structure, its characterized in that: the novel filter comprises a valve casing (1), a filter screen device (2) and a composite filter element (3), wherein the valve casing (1) is of a sleeve structure with one end open, the filter screen device (2) and the composite filter element (3) are sequentially arranged in the valve casing (1) from inside to outside, a plurality of positioning rings (4) and rubber rings are further arranged, and a protective cover (5) is arranged at the open end of the valve casing (1); the closed end of the valve casing (1) and the protective cover (5) are provided with water holes; a positioning ring (4), a rubber ring, a filter screen device (2), a rubber ring, a positioning ring (4), a rubber ring, a composite filter element (3), a rubber ring and a positioning ring (4) are sequentially arranged in the valve casing (1) from inside to outside; the composite filter element (3) comprises a metal base (51) and a functionalized graphene film (52) and a sand core (53) which are positioned in the metal base (51), wherein the sand core (53) is positioned at one side of the open end of the valve casing (1), the sand core (53) is sealed with the metal base (51) through waterproof glue, the surface of the sand core (53) is covered with a microporous filter film, the functionalized graphene film (52) is positioned on the microporous filter film, the aperture of the microporous filter film is 0.1 mu m, the loading capacity of the functionalized graphene film (52) is 100 g/, the filter screen device (2) is a blind plate (21) with a siphon device, the siphon device comprises a siphon tube (22) and a vent pipe (23), the siphon tube (22) and the vent pipe (23) are all penetrated through the blind plate (21), the blind plate (21) is circumferentially provided with external threads meshed with the inner wall of the valve casing (1), one end of the siphon tube (22) positioned between the blind plate (21) and the valve casing (1) is provided with a filter screen (24), and the mouth of pipe faces the blind plate (21).
2. An automatic drain valve based on a membrane structure according to claim 1, wherein: the closed end of the valve housing (1) has an external thread for connection to external equipment.
3. An automatic drain valve based on a membrane structure according to claim 1, wherein: the inner wall of the valve casing (1) is provided with internal threads, and the peripheries of the filter screen device (2), the composite filter element (3) and the positioning ring (4) are provided with external threads meshed with the internal threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106456.2A CN113915390B (en) | 2021-09-22 | 2021-09-22 | Automatic drain valve based on membrane structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106456.2A CN113915390B (en) | 2021-09-22 | 2021-09-22 | Automatic drain valve based on membrane structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113915390A CN113915390A (en) | 2022-01-11 |
| CN113915390B true CN113915390B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111106456.2A Active CN113915390B (en) | 2021-09-22 | 2021-09-22 | Automatic drain valve based on membrane structure |
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