CN110397775B - Sample valve is opened in chemical industry field prevents that inlayer adhesion pair is opened - Google Patents
Sample valve is opened in chemical industry field prevents that inlayer adhesion pair is opened Download PDFInfo
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- CN110397775B CN110397775B CN201910715994.8A CN201910715994A CN110397775B CN 110397775 B CN110397775 B CN 110397775B CN 201910715994 A CN201910715994 A CN 201910715994A CN 110397775 B CN110397775 B CN 110397775B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/448—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/513—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using plasma jets
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
Abstract
The invention discloses an inner layer adhesion prevention double-opening sampling valve in the chemical field, belonging to the field of sampling valves, wherein the inner walls of an inlet valve cavity (a), an outlet valve cavity (b) and a sampling channel are coated with an ultra-adhesion prevention coating, corrosive fluid medium is easy to slide off from the surface of the ultra-adhesion prevention coating, the contact area of the corrosive fluid medium and the coating is reduced, the accumulation of the corrosive fluid medium on the surface of the coating is reduced, so that the permeation of the corrosive fluid medium to the coating is reduced, the inhibition effect on corrosion is realized, in addition, a stamping and scraping mechanism is arranged at the sampling channel, the fluid medium can be continuously introduced after the sampling is finished each time, a built-in stamping disc is impacted by the fluid medium, so that a flexible swinging ring with a hard cutting edge scrapes a small amount of medium adhered to the pipe wall of the sampling channel, and the purity of the medium sampled next time is improved, the error of sample detection caused by sample impurity can be minimized.
Description
Technical Field
The invention relates to the field of sampling valves, in particular to a duplex-opening sampling valve for preventing inner layer adhesion in the field of chemical industry.
Background
The sampling valve is a valve for obtaining a medium sample in a pipeline or equipment, and a special sampling valve is often used for sampling in occasions where chemical analysis is frequently required on the medium sample. According to the working principle or different performances during sampling, the sampling valve mainly comprises a duplex opening valve, a flange clamping piece valve and a sampling valve with a heat-preservation clamping sleeve.
The double-opening valve is the most common sampling valve, and is also one of aseptic sampling valves, and the aseptic sampling valve is used for guaranteeing the sterility of a sampling environment as the name suggests. The double-opening valve is usually composed of two connected ball valves, so that the double-opening valve is named. The double-linkage opening valve has the characteristics of safe and stable sampling. In the sampling process, the valve A close to the equipment and the pipeline in the duplex opening valve is firstly closed, then the valve B is opened, the medium flows into the space between the two valves, then the valve B is closed, the valve A is opened, and the sampling vessel is placed at the sampling port to contain the sampling medium.
The sampling valve is arranged on the medium pipeline to extract a medium sample, and when the valve is opened, the medium flows into the sampling container from the sampling port to realize online sampling. The main disadvantages of the existing sampling valve are: in the process of sampling high-pressure, toxic and dangerous media, when the valve is opened, the high-pressure media are easily sprayed and splashed out from the pressure taking port, so that the injury and the environmental pollution are caused to operators, and the operation safety is poor.
In order to solve the above problems, chinese patent publication No. CN205806575U discloses a visual sampling duplex ball valve, which comprises a valve body having an inlet valve cavity and an outlet valve cavity, a sampling passage with the same diameter as the pipeline is provided between the inlet valve cavity and the outlet valve cavity, and spheres are respectively installed in the inlet valve cavity and the outlet valve cavity to form an inlet ball valve and an outlet ball valve; mainly, a sight glass window is arranged above a sampling channel, and a sampling valve is arranged below the sampling channel; the sampling valve consists of a sampling tube, a valve core, a valve rod and a hand wheel, wherein the inlet of the sampling tube is communicated with the inner cavity of the sampling channel, and one side of the middle part of the sampling tube is provided with a sampling port; the valve core adopts a plunger type structure, the outer circular surface of the plunger is in dynamic sealing fit with the inner hole wall of the sampling tube, the lower end of the plunger is fixedly connected with the upper end of the valve rod, and the lower end of the valve rod is connected with a hand wheel through a valve rod nut. The high-pressure medium is prevented from spraying and splashing to hurt operators and pollute the environment during sampling, the operation is safe and reliable, and the device is suitable for sampling of high-pressure medium pipelines.
However, in the duplex sampling valve in the above patent and the duplex sampling valve in the prior art, the inner layer often adheres to the sampled medium, and when sampling at each time, the medium adhered to the inner layer of the valve body in the previous sampling process is mixed into the currently sampled medium, so that sampling impurities are caused, and the sample detection error is increased.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide an inner layer adhesion prevention double-connection opening sampling valve in the chemical field, which is characterized in that an inlet valve cavity, an outlet valve cavity and the inner wall of a sampling channel are coated with an ultra-adhesion prevention coating, corrosive fluid media easily slide from the surface of the ultra-adhesion prevention coating, the contact area of the corrosive fluid media and the coating is reduced, the accumulation of the corrosive fluid media on the surface of the coating is reduced, the permeation of the corrosive fluid media to the coating is reduced, the corrosion inhibition effect is realized, in addition, a stamping material scraping mechanism is arranged at the sampling channel, the flowing impact force of the fluid media can be utilized to ensure that the stamping material scraping mechanism carries out scraping action on the pipe wall adhesion of the sampling channel, the purity of each sampling is improved, and the sample detection error is reduced.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A sampling valve is opened in chemical industry field to prevent double-linkage of inner layer adhesion, includes import valve pocket and export valve pocket, be equipped with sample passage between import valve pocket and the export valve pocket, all coating has super anti-adhesion coating on import valve pocket, export valve pocket and the sample passage inner wall, the sample passage lower extreme is provided with the sample connection, sample passage department is equipped with punching press scraping mechanism, punching press scraping mechanism includes built-in punching press dish and a pair of supplementary shifting block, and a pair of supplementary shifting block symmetry fixed connection is in built-in punching press dish side, the pipe wall of sample passage is opened has a pair of lateral shifting groove, a pair of supplementary shifting block is located a pair of lateral shifting groove respectively and with lateral shifting groove sliding connection, fixedly connected with multistage elasticity telescopic link on the lateral wall that lateral shifting groove lateral wall is close to the import valve pocket, one end that lateral shifting groove lateral wall was kept away from to multistage elasticity chiseling a fixed connection with supplementary shifting block, the utility model discloses a punching press material scraping mechanism, including built-in punching press dish edge department, the centre of a circle outside of built-in punching press dish is dug to built-in punching press dish edge department has a plurality of restricted orifices, and a plurality of restricted orifices evenly encircle in built-in punching press dish, all coat on import valve pocket, export valve pocket and sampling channel inner wall and have super anti-adhesion coating, corrosive fluid medium is very easily followed this kind of super anti-adhesion coating surface landing, reduce the area of contact of corrosive fluid medium and coating, thereby reduce the gathering of corrosive fluid medium on the coating surface and reduce the infiltration of corrosive fluid medium to the coating, realize the inhibitory action to corroding, be equipped with the punching press in sampling channel department in addition and scrape the material mechanism, the trickling impact force of usable fluid medium makes the punching press scrape the material mechanism strike off the pipe wall adhesion thing of sampling channel, improve the purity of.
Further, the pipe wall department fixedly connected with of sampling passageway is a plurality of supplementary rifle that switches on, and supplementary the rifle that switches on is located between lateral shifting groove and the export valve pocket, and is a plurality of supplementary rifle and a plurality of restricted aperture phase-match that switches on, supplementary rifle that switches on inserts the restricted aperture and switches on, prevents that the restricted aperture from blockking up.
Furthermore, one end, close to the inlet valve cavity, of the built-in stamping disc is provided with a concave surface, and the concave surface is subjected to polishing treatment, so that the impact force of the medium on the concave surface is stronger, and the built-in stamping disc can be pushed to the other end of the transverse displacement groove even if the fluid medium has a small flow velocity.
Furthermore, the side end of the built-in stamping disc is fixedly connected with a flexible swinging ring, the end part of the outer ring of the flexible swinging ring is a hard cutting edge, and a small amount of medium adhered to the pipe wall of the sampling channel can be well scraped by the hard cutting edge.
Furthermore, supplementary one end that switches on the rifle and be close to the restricted aperture is through polishing treatment, the inner wall of restricted aperture is through polishing treatment equally, reduces supplementary friction that switches on the rifle and insert the restricted aperture in-process to insert smoothly and switch on the restricted aperture, prevent that the restricted aperture from blockking up.
The coating method of the super anti-adhesion coating comprises the following steps:
s1, detaching the sampling valve, putting the sampling valve into ultrasonic cleaning equipment, adding 5wt% of sodium hydroxide solution, soaking for 30 minutes, then adding ionized water, ultrasonically cleaning for 3-5 minutes, and fishing out and drying;
s2, placing the parts disassembled by the sampling valve in a reaction cavity of a plasma chamber, continuously vacuumizing the reaction cavity, vacuumizing the vacuum degree in the reaction cavity to 10-200 mTorr, and introducing inert gas or nitrogen;
s3, introducing monomer steam to a vacuum degree of 30-300ml, starting plasma discharge, and performing chemical vapor deposition to prepare a compact coating;
s4, after the deposition of the dense coating is finished, adjusting the discharge power and the discharge time of the plasma, and performing chemical vapor deposition to prepare a rough coating; preparing a corrosion-resistant and super-adhesion-resistant coating with a compact coating as an inner layer and a rough coating as an outer layer on the surface of a part disassembled from the sampling valve;
and S5, stopping plasma discharge, stopping introducing monomer steam, continuously vacuumizing, keeping the vacuum degree of the reaction cavity at 10-200 mTorr for 1-5min, introducing the atmosphere to one atmospheric pressure, and taking out the parts disassembled by the sampling valve.
Further, in S3, the power of the plasma discharge is 2-150W, and the discharge time is 600-7200S.
Further, in S4, the power of the plasma discharge is adjusted to 160-500W, and the discharge time is adjusted to 60-1000S.
Through plasma chemical vapor deposition technology, the deposit rate of control monomer can be on the spare part surface that this sample valve was unpacked apart prepare the super anti-adhesion coating surface that has the multilevel structure that is fine and close and coarse coating combines, corrosive fluid medium very easily follows this kind of super anti-adhesion coating surface landing, reduce the area of contact of corrosive fluid medium and coating, thereby reduce the gathering of corrosive fluid medium on the coating surface and reduce the infiltration of corrosive fluid medium to the coating, realize the inhibitory action to the corruption.
Furthermore, the rough coating surface on the pipe wall of the sampling channel needs to be subjected to oxidation ball milling treatment subsequently, the pipe wall coating of the sampling channel is frequently contacted with the edge of the built-in stamping disc, and the pipe wall coating surface of the sampling channel subjected to oxidation ball milling treatment has certain smoothness and is not easy to fall off due to scraping.
Further, the fine and close coating of inlayer is red, outer rough coating is blue, can get into the sampler along with fluid medium after the inside super anti-adhesion coating of valve body drops, and operating personnel can know the inside super anti-adhesion coating condition of dropping of valve body immediately, and can judge the condition of dropping of interior outer coating according to the coating colour that drops.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is in the import valve pocket, all coat on export valve pocket and the sample access inner wall and have super anti-sticking coating, corrosive fluid medium very easily follows this kind of super anti-sticking coating surperficial landing, reduce the area of contact of corrosive fluid medium and coating, thereby reduce the gathering of corrosive fluid medium on the coating surface and reduce the infiltration of corrosive fluid medium to the coating, realize the inhibitory action to corroding, be equipped with the punching press in sample access department in addition and scrape material mechanism, the trickling impact force of usable fluid medium makes the punching press scrape material mechanism strike off the effect to the pipe wall adherent of sample access, improve the purity of sample at every turn, reduce the sample detection error.
(2) A plurality of supplementary guns that switch on of pipe wall department fixedly connected with of sampling channel, and supplementary the rifle that switches on is located between lateral shifting groove and the export valve pocket, and a plurality of supplementary guns and a plurality of restricted aperture phase-matchs that switch on, and supplementary rifle that switches on inserts the restricted aperture and switches on, prevents that the restricted aperture from blockking up.
(3) One end of the built-in stamping disc, which is close to the inlet valve cavity, is set to be a sunken surface, and the sunken surface is subjected to polishing treatment, so that the impact force of the medium on the sunken surface is stronger, and the built-in stamping disc can be pushed to the other end of the transverse displacement groove even if the fluid medium has a smaller flow velocity.
(4) The side end of the built-in stamping disc is fixedly connected with a flexible swinging ring, the end part of the outer ring of the flexible swinging ring is a hard cutting edge, and a small amount of medium adhered to the pipe wall of the sampling channel can be well scraped by the hard cutting edge.
(5) The rough coating surface on the pipe wall of the sampling channel needs to be subjected to oxidation ball-milling treatment subsequently, the pipe wall coating of the sampling channel is frequently contacted with the edge of the built-in stamping disc, and the pipe wall coating surface of the sampling channel subjected to oxidation ball-milling treatment has certain smoothness and is not easy to fall off due to scraping.
(6) The compact coating of inlayer is red, and outer rough coating is blue, can get into the sampler along with fluid medium after the inside super anti-adhesion coating of valve body drops, and operating personnel can know the inside super anti-adhesion coating condition of dropping of valve body immediately, and can judge the condition of dropping of interior outer coating according to the coating colour that drops.
Drawings
FIG. 1 is a schematic structural view of the present invention in a state where no fluid medium is introduced;
FIG. 2 is a schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of the structure at B in FIG. 1;
FIG. 4 is a schematic structural view of the present invention in a state of introducing a fluid medium;
FIG. 5 is a schematic view of the structure at C in FIG. 4;
FIG. 6 is a schematic structural view of the present invention with the built-in punching disc removed from the flexible swinging ring;
fig. 7 is a schematic structural view of the built-in punching disc connected with the flexible swinging ring.
The reference numbers in the figures illustrate:
1 built-in punching disc, 2 supplementary shift blocks, 3 restricted aperture, 4 horizontal shift grooves, 5 multistage elasticity telescopic links, 6 supplementary rifle, 7 flexible swing circle of switching on.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a double-opening sampling valve for preventing inner layer adhesion in the chemical field, similar to a visual sampling double-opening ball valve disclosed in chinese patent publication No. CN205806575U, comprises an inlet valve cavity a and an outlet valve cavity b, a sampling passage is provided between the inlet valve cavity a and the outlet valve cavity b, super-adhesion-resistant coatings are coated on the inner walls of the inlet valve cavity a, the outlet valve cavity b and the sampling passage, a sampling port (Q) is provided at the lower end of the sampling passage, and a punching scraper mechanism is provided at the sampling passage;
referring to fig. 2, the punching scraping mechanism includes a built-in punching plate 1 and a pair of auxiliary shifting blocks 2, the pair of auxiliary shifting blocks 2 are symmetrically welded at the side end of the built-in punching plate 1, a pair of lateral shifting grooves 4 are drilled on the tube wall of the sampling channel, the pair of auxiliary shifting blocks 2 are respectively positioned in the pair of lateral shifting grooves 4 and are slidably connected with the lateral shifting grooves 4, a multi-stage elastic telescopic rod 5 is fixedly connected to the side wall of the lateral shifting groove 4 close to the inlet valve cavity a, and one end of the multi-stage elastic telescopic rod 5 far away from the side wall of the lateral shifting groove 4 is welded with the auxiliary shifting block 2;
referring to fig. 2 and 7, a plurality of flow-limiting holes 3 are drilled at the edge of the built-in punching plate 1, and the flow-limiting holes 3 uniformly surround the outer side of the circle center of the built-in punching plate 1, during sampling, the outlet valve is closed first and then the inlet valve is closed to sample, so as to avoid splashing of high-pressure medium, super adhesion-resistant coatings are coated on the inner walls of the inlet valve cavity a, the outlet valve cavity b and the sampling channel, corrosive fluid medium is easy to slide off the surface of the super adhesion-resistant coatings, the contact area of the corrosive fluid medium and the coatings is reduced, the accumulation of the corrosive fluid medium on the surfaces of the coatings is reduced, so as to reduce the permeation of the corrosive fluid medium to the coatings, and inhibit corrosion is realized, in addition, a punching scraping mechanism is arranged at the sampling channel, so that the punching scraping mechanism can scrape off the adhesion of the pipe wall of the sampling channel by using the flowing impact force of the, the purity of sampling each time is improved, and the detection error of the sample is reduced.
Referring to fig. 3 and 5, a plurality of auxiliary conduction guns 6 are welded on the pipe wall of the sampling passage, the auxiliary conduction guns 6 are located between the lateral displacement groove 4 and the outlet valve cavity b, the plurality of auxiliary conduction guns 6 are matched with the plurality of flow limiting holes 3, and the auxiliary conduction guns 6 are inserted into the flow limiting holes 3 for conduction to prevent the flow limiting holes 3 from being blocked.
Referring to fig. 6, one end of the internal pressing plate 1 near the inlet valve cavity a is set as a concave surface, and the concave surface is polished, so that the impact force of the medium on the concave surface is stronger, and the fluid medium can push the internal pressing plate 1 to the other end of the lateral displacement groove 4 even at a low flow rate.
Referring to fig. 7, a flexible swinging ring 7 is glued to the side end of the built-in punching plate 1, the end of the outer ring of the flexible swinging ring 7 is a hard cutting edge, and the hard cutting edge can better scrape a small amount of medium adhered to the pipe wall of the sampling passage.
The one end that supplementary rifle 6 that switches on is close to restricted orifice 3 is through polishing treatment, and the inner wall of restricted orifice 3 is through polishing treatment equally, reduces supplementary friction that switches on rifle 6 and insert 3 in-process of restricted orifice to insert smoothly and switch on restricted orifice 3, prevent that restricted orifice 3 from blockking up.
The coating method of the super anti-adhesion coating comprises the following steps:
s1, detaching the sampling valve, putting the sampling valve into ultrasonic cleaning equipment, adding 5wt% of sodium hydroxide solution, soaking for 30 minutes, then adding ionized water, ultrasonically cleaning for 3-5 minutes, and fishing out and drying;
s2, placing the parts disassembled by the sampling valve in a reaction cavity of a plasma chamber, continuously vacuumizing the reaction cavity, vacuumizing the vacuum degree in the reaction cavity to 10-200 mTorr, and introducing inert gas or nitrogen;
s3, introducing monomer steam to a vacuum degree of 30-300ml, starting plasma discharge, and performing chemical vapor deposition to prepare a compact coating;
s4, after the deposition of the dense coating is finished, adjusting the discharge power and the discharge time of the plasma, and performing chemical vapor deposition to prepare a rough coating; preparing a corrosion-resistant and super-adhesion-resistant coating with a compact coating as an inner layer and a rough coating as an outer layer on the surface of a part disassembled from the sampling valve;
and S5, stopping plasma discharge, stopping introducing monomer steam, continuously vacuumizing, keeping the vacuum degree of the reaction cavity at 10-200 mTorr for 1-5min, introducing the atmosphere to one atmospheric pressure, and taking out the parts disassembled by the sampling valve.
In S3, the power of plasma discharge is 2-150W, and the discharge time is 600-7200S.
In S4, the power of the plasma discharge is adjusted to 160-500W, and the discharge time is adjusted to 60-1000S.
Through plasma chemical vapor deposition technology, the deposit rate of control monomer can be on the spare part surface that this sample valve was unpacked apart prepare the super anti-adhesion coating surface that has the multilevel structure that is fine and close and coarse coating combines, corrosive fluid medium very easily follows this kind of super anti-adhesion coating surface landing, reduce the area of contact of corrosive fluid medium and coating, thereby reduce the gathering of corrosive fluid medium on the coating surface and reduce the infiltration of corrosive fluid medium to the coating, realize the inhibitory action to the corruption.
The coating method of the super anti-adhesion coating is based on a preparation method of a low-adhesion and corrosion-resistant coating disclosed by Chinese patent publication No. CN107058981B, all realizable technical schemes and means in the disclosed patent are utilized by the scheme, and the same points do not belong to the technical key points protected by the invention, so the description is not repeated herein, but the difference from the disclosed patent is that firstly, in S1, ultrasonic cleaning equipment is utilized to clean the surface of a part disassembled from the sampling valve, and in addition, sodium hydroxide solution is soaked and then ionized water is used for ultrasonic cleaning, so the coating effect of the coating can be improved; the super anti-adhesion coating is divided into an inner layer which is a compact coating and an outer layer which is a rough coating, the compact coating of the inner layer is red, the outer layer of the rough coating is blue, the super anti-adhesion coating inside the valve body can enter the sampler along with the fluid medium after falling off, an operator can immediately know the falling-off condition of the super anti-adhesion coating inside the valve body, and the falling-off condition of the inner coating and the outer coating can be judged according to the color of the falling coating.
The rough coating surface on the pipe wall of the sampling channel needs to be subjected to oxidation ball-milling treatment subsequently, the pipe wall coating of the sampling channel is frequently contacted with the edge of the built-in punching plate 1, and the pipe wall coating surface of the sampling channel subjected to oxidation ball-milling treatment has certain smoothness and is not easy to fall off due to scraping.
Compared with the prior art that the inner layer of the duplex sampling valve often adheres to the sampled medium, the problem that the medium adhered to the inner layer of the valve body is mixed into the currently sampled medium in the previous sampling process to cause impure sampling and increase the detection error of the sample is solved, the super-adhesion-resistant coating is coated on the inner walls of the inlet valve cavity a, the outlet valve cavity b and the sampling channel, the corrosive fluid medium is easy to slip off from the surface of the super-adhesion-resistant coating, the contact area of the corrosive fluid medium and the coating is reduced, the accumulation of the corrosive fluid medium on the surface of the coating is reduced, the permeation of the corrosive fluid medium to the coating is reduced, the corrosion inhibition effect is realized, in addition, the stamping scraping mechanism is arranged at the sampling channel, the flowing impact force of the fluid medium can be utilized to ensure that the stamping scraping mechanism has the scraping effect on the adhered matter on the pipe wall of the sampling channel, the fluid medium can be continuously introduced after sampling is finished every time, the built-in punching disc 1 is impacted by the fluid medium, so that the flexible swinging ring 7 with the hard cutting edge scrapes a small amount of medium adhered to the tube wall of the sampling channel, the purity of the medium sampled next time is improved, and the detection error of the sample caused by impure samples can be reduced to the lowest extent.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. The utility model provides a sample valve is opened in chemical industry field prevents that inlayer adhesion pair is opened, includes import valve pocket (a) and export valve pocket (b), its characterized in that: a sampling passage is arranged between the inlet valve cavity (a) and the outlet valve cavity (b), the inner walls of the inlet valve cavity (a), the outlet valve cavity (b) and the sampling passage are coated with super anti-adhesion coatings, the lower end of the sampling passage is provided with a sampling port (Q), a punching and scraping mechanism is arranged at the sampling passage and comprises a built-in punching plate (1) and a pair of auxiliary shifting blocks (2), the pair of auxiliary shifting blocks (2) are symmetrically and fixedly connected to the side end of the built-in punching plate (1), a pair of transverse shifting grooves (4) are formed in the pipe wall of the sampling passage, the pair of auxiliary shifting blocks (2) are respectively positioned in the pair of transverse shifting grooves (4) and are in sliding connection with the transverse shifting grooves (4), and a multi-stage elastic telescopic rod (5) is fixedly connected to the side wall, close to the inlet valve cavity (a), of the transverse shifting grooves (4), one end of the side wall of the transverse displacement groove (4) is kept away from by the multi-stage elastic telescopic rod (5) and the auxiliary displacement block (2) is fixedly connected, a plurality of flow limiting holes (3) are drilled at the edge of the built-in pressure flushing plate (1), and the plurality of flow limiting holes (3) uniformly surround the outer side of the circle center of the built-in pressure flushing plate (1).
2. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: sampling channel's pipe wall department fixedly connected with a plurality of supplementary rifle (6) that lead to, and supplementary rifle (6) that lead to are located between lateral shifting groove (4) and export valve pocket (b), and are a plurality of supplementary rifle (6) and a plurality of restricted aperture (3) phase-match that lead to.
3. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: one end of the built-in stamping disc (1) close to the inlet valve cavity (a) is set to be a concave surface, and the concave surface is polished.
4. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: the side end of the built-in punching disc (1) is fixedly connected with a flexible swinging ring (7), and the end part of the outer ring of the flexible swinging ring (7) is a hard cutting edge.
5. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: one end, close to the flow limiting hole (3), of the auxiliary conduction gun (6) is subjected to polishing treatment, and the inner wall of the flow limiting hole (3) is also subjected to polishing treatment.
6. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: the coating method of the super anti-adhesion coating comprises the following steps:
s1, detaching the sampling valve, putting the sampling valve into ultrasonic cleaning equipment, adding 5wt% of sodium hydroxide solution, soaking for 30 minutes, then adding ionized water, ultrasonically cleaning for 3-5 minutes, and fishing out and drying;
s2, placing the parts disassembled by the sampling valve in a reaction cavity of a plasma chamber, continuously vacuumizing the reaction cavity, vacuumizing the vacuum degree in the reaction cavity to 10-200 mTorr, and introducing inert gas or nitrogen;
s3, introducing monomer steam to a vacuum degree of 30-300ml, starting plasma discharge, and performing chemical vapor deposition to prepare a compact coating;
s4, after the deposition of the dense coating is finished, adjusting the discharge power and the discharge time of the plasma, and performing chemical vapor deposition to prepare a rough coating; preparing a corrosion-resistant and super-adhesion-resistant coating with a compact coating as an inner layer and a rough coating as an outer layer on the surface of a part disassembled from the sampling valve;
and S5, stopping plasma discharge, stopping introducing monomer steam, continuously vacuumizing, keeping the vacuum degree of the reaction cavity at 10-200 mTorr for 1-5min, introducing the atmosphere to one atmospheric pressure, and taking out the parts disassembled by the sampling valve.
7. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: in S3, the power of the plasma discharge is 2-150W, and the discharge time is 600-7200S.
8. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: in S4, the power of the plasma discharge is adjusted to 160-500W, and the discharge time is adjusted to 60-1000S.
9. The chemical field anti-inner layer adhesion double-opening sampling valve as claimed in claim 1 or 6, wherein: the rough coating surface on the tube wall of the sampling channel needs to be subjected to oxidation ball milling treatment subsequently.
10. The chemical industry field sample valve capable of preventing the inner layer from adhering in a double-opening mode is characterized in that: the compact coating of the inner layer is red, and the rough coating of the outer layer is blue.
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| CN114135679B (en) * | 2021-11-25 | 2022-07-15 | 浙江瑞通阀门有限公司 | Stop valve capable of dynamically sampling |
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| CN110397775A (en) | 2019-11-01 |
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Inventor after: Zhang Yaohui Inventor after: Ma Jianhua Inventor after: Zhou Tianqiao Inventor before: Zhou Tianqiao |
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Effective date of registration: 20230923 Address after: 441800 East side of Jinxiu Road, Science and Technology Industrial Park, Laohekou City, Hubei Province Patentee after: HUBEI XUEFEI CHEMICAL CO.,LTD. Address before: 317205 Zhoucun Street 2, Tiantai County, Taizhou, Zhejiang Patentee before: Zhou Tianqiao |