CN108548848B - Online automatic device that blasts of pH meter - Google Patents
Online automatic device that blasts of pH meter Download PDFInfo
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- CN108548848B CN108548848B CN201810359802.XA CN201810359802A CN108548848B CN 108548848 B CN108548848 B CN 108548848B CN 201810359802 A CN201810359802 A CN 201810359802A CN 108548848 B CN108548848 B CN 108548848B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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Abstract
The invention relates to an online automatic purging device for a pH meter, which comprises a rainproof cover, a connecting cylinder, an installation base and a gas source pipe, wherein the connecting cylinder is vertically arranged, the rainproof cover is connected with the upper end of the connecting cylinder, the installation base is connected with the lower end of the connecting cylinder, a sealed cavity is arranged in the installation base, the pH meter is fixed in the sealed cavity, the gas inlet end of the gas source pipe is connected with compressed air, and the gas outlet end of the gas source pipe sequentially penetrates through the rainproof cover and the connecting cylinder, extends into the sealed cavity in the installation base and faces the pH meter. The invention adopts compressed air to clean the pH meter for detecting sewage or other solutions easy to crystallize, does not add other media, does not influence the pH value of the detected solution, and has simple structure, easy operation and high working efficiency.
Description
Technical Field
The invention relates to an online automatic purging device for a pH meter, in particular to a device for online automatic flushing of the pH meter by utilizing compressed air under the condition that a measured medium is turbid and is easy to scale.
Background
The pH meter is a common instrument and equipment, is mainly used for precisely measuring the pH value of a liquid medium, can also measure the potential MV value of an ion electrode by matching with a corresponding ion selection electrode, and is widely applied to the fields of environmental protection, sewage treatment, scientific research, pharmacy, fermentation, chemical industry, cultivation, tap water and the like. The instrument is also a necessary inspection device in QS and HACCP certification of food factories and drinking water factories.
However, when the pH meter is used in an environment where the medium is easily crystallized, the pH meter is easily scaled, which causes inaccurate measurement and needs to be cleaned regularly. Frequently used pH meters need to be cleaned at least once a day. The traditional manual cleaning method needs two-person operation, wastes time and labor, has poor cleaning effect, and influences the measurement precision and the service cycle.
Disclosure of Invention
The invention aims to solve the technical problem that the pH meter online automatic purging device has good automatic purging effect and flexible and simple operation and is time-saving and labor-saving, aiming at the working condition that crystallization is easy on site, and the defects that a pH meter needs to be periodically and manually cleaned in the using and measuring process to ensure the cleanness of a probe of the pH meter, the measurement is inaccurate and untimely and the like.
The technical scheme for solving the technical problems is as follows: the utility model provides a pH meter is automatic blasts device on line which characterized in that, includes rain-proof lid, connecting cylinder, installation base and air supply pipe, the vertical setting of connecting cylinder, rain-proof lid with the upper end of connecting cylinder is connected, the installation base with the lower extreme of connecting cylinder is connected, be equipped with sealed cavity in the installation base, sealed cavity internal fixation has the pH meter, compressed air is connected to the inlet end of air supply pipe, the end of giving vent to anger of air supply pipe passes rain-proof lid and connecting cylinder in proper order, and stretches into in the sealed cavity in the installation base, and just right the pH meter
The invention has the beneficial effects that: the invention adopts compressed air to clean the pH meter for detecting sewage or other solutions easy to crystallize, does not add other media, does not influence the pH value of the detected solution, and has simple structure, easy operation and high working efficiency.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the two gas source pipes are arranged in parallel.
The beneficial effect of adopting the further scheme is that: compressed air sprayed from the two air source pipes forms a blowing vortex in a relatively sealed space, so that the pH meter can be better cleaned.
Furthermore, the air inlet ends of the two air source pipes are respectively connected to two ports of the quick-insertion tee joint, and the other port of the quick-insertion tee joint is connected with compressed air.
Furthermore, the other port of the quick-insertion tee joint is connected with compressed air through a two-position three-way electromagnetic valve.
The compressed air in the invention can be generated by an air compressor, the compressed air pressure P is 4-5bar, an air inlet of the compressed air compressor is communicated with the external environment, an air outlet of the compressed air compressor is communicated with an air inlet of a two-position three-way electromagnetic valve, one air outlet of the two-position three-way electromagnetic valve is connected with the other port of the quick-insertion three-way valve, and the other air outlet is blocked (the two-position three-way electromagnetic valve adopts the standard specification in the field, and is provided with two working positions, one air inlet, one air outlet and one air outlet, and whether the air outlet is provided with the compressed air or.
The beneficial effect of adopting the further scheme is that: the two-position three-way electromagnetic valve can be arranged in a DCS distribution room, the power supply and the power loss are controlled by a DCS relay, the two-position three-way electromagnetic valve controls the on-off of compressed air through a DCS program, the on-off time of the compressed air is controlled by the DCS program, purging and measuring time is flexibly set according to the field use condition, the intermittent washing of the pH meter is realized, namely, sampling and purging are carried out intermittently without mutual influence.
DCS is an english abbreviation (Distributed Control System) of Distributed Control System, and is also called as a Distributed Control System in the domestic automatic Control industry. The computer control system is a novel computer control system relative to a centralized control system, and is developed and evolved on the basis of the centralized control system. DCS is a highly integrated product of computer technology, control technology and network technology. DCS generally employs a number of controllers (process stations) to control a number of control points in a production process, with the controllers being networked for data exchange. The operation adopts a computer operation station, is connected with the controller through a network, collects production data and transmits operation instructions. Therefore, the main features of DCS are summarized as one sentence: and (5) decentralized control and centralized management. The control decisions of the DCS are made by the process control station, so the control procedures are performed by the process control station. The process control station of DCS is a complete computer system, mainly composed of a power supply, a CPU (central processing unit), a network interface and I/O. The power on and off of the two-position three-way electromagnetic valve are controlled by the on and off of a Digital Output (DO) point of the DCS, and the power on and off time is controlled by the DCS through programming.
Furthermore, the air outlet ends of the two air source pipes have height difference, the air outlet end of one air source pipe corresponds to the probe part of the pH meter, and the air outlet end of the other air source pipe is arranged close to the upper part; the air outlet ends of the two air source pipes are provided with angle difference, and the air outlet direction angle difference of the air outlet ends is 180 degrees.
The beneficial effect of adopting the further scheme is that: the air outlet end of one air source pipe is opposite to the position of the probe at the lower end of the pH meter, dirt at the probe is specially cleaned, the other air source pipe is slightly short, the position of the air outlet end is arranged close to the upper part, for example, the air outlet end can be corresponding to the middle part of the pH meter to clean the dirt on the pH meter, so that height difference exists, a blow washing vortex can be better formed, and if the height difference is consistent, air conflicts with each other, and the cleaning is not facilitated; and the air outlet directions of the two air source pipes have an angle difference of 180 degrees so as to ensure that the purging range is more comprehensive.
Furthermore, the installation base is hollow and provided with an installation plate, the lower end of the installation base is connected with a sealing cover, and a sealing cavity is formed in an area between the installation plate and the sealing cover in the installation base.
Furthermore, the mounting plate is provided with a mounting hole for mounting the pH meter and a through hole for the air supply pipe to pass through.
Furthermore, the sealing cover is provided with a measuring liquid inlet hole, and the side wall of the mounting base is provided with an exhaust hole communicated with the sealing cavity.
The beneficial effect of adopting the further scheme is that: the measuring liquid inlet hole is used for flushing intermittent measuring medium into the sealed chamber for sampling measurement or discharging the intermittent measuring medium out of the sealed chamber, and the exhaust hole is used for discharging compressed air out of the sealed chamber during flushing.
Furthermore, the rain-proof cover with the upper end of connecting cylinder is connected thick threaded connection through rain-proof cover, the installation base with the lower extreme of connecting cylinder is connected thick threaded connection through the base.
The coarse threads are the coarse threads, are common standard threads, and can conveniently realize the interchangeability of equipment connection. The coarse thread has the same length and less teeth, and is better suitable for bearing larger pulling force and impact force because the section size of each tooth is larger. In contrast, the fine thread has a smaller pitch, and compared with the coarse thread, the fine thread has a larger number of threads to be screwed in, i.e. the effect of reducing fluid leakage is achieved, so that the sealing device is used in occasions needing sealing. The connection of the present invention described above does not require sealing, so a coarse thread is chosen to facilitate the interchange of the connections. The sealing cover can also be connected with the lower end of the mounting base through thick threads.
Furthermore, the connecting cylinder is also connected with a mounting flange for fixing the whole device.
The beneficial effect of adopting the further scheme is that: the mounting flange is welded with the outer side wall of the connecting cylinder and used for fixing the whole device.
Drawings
FIG. 1 is a schematic structural diagram of an on-line automatic purging device of a pH meter according to the present invention; in particular a front sectional view of the device.
In the drawings, the components represented by the respective reference numerals are listed below:
1. rain-proof lid, 2, rain-proof lid connect thick screw thread, 3, mounting flange, 4, connecting cylinder, 5, base connection thick screw thread, 6, air supply pipe, 7, mounting hole, 8, exhaust hole, 9, pH electrode, 10, measurement feed liquor hole, 11, insert the tee bend soon, 12, two-position tee bend solenoid valve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in figure 1, the invention relates to an online automatic purging device for a pH meter, which comprises a rainproof cover 1, a connecting cylinder 4, a mounting base and a gas source pipe 6, wherein the connecting cylinder 4 is vertically arranged, the rainproof cover 1 is connected with the upper end of the connecting cylinder 4, the mounting base is connected with the lower end of the connecting cylinder 4, a sealed chamber is arranged in the mounting base, a pH meter 9 is fixed in the sealed chamber, the gas inlet end of the gas source pipe 6 is connected with compressed air, and the gas outlet end of the gas source pipe 6 sequentially penetrates through the rainproof cover 1 and the connecting cylinder 4, extends into the sealed chamber in the mounting base and faces the pH meter 9. The invention adopts compressed air to clean the pH meter 9 for detecting sewage or other solutions easy to crystallize, does not add other media, does not influence the pH value of the detected solution, and has simple structure, easy operation and high working efficiency.
In a specific embodiment, two air source pipes 6 are arranged in parallel, and compressed air sprayed from the two air source pipes 6 forms a purging vortex in a relatively sealed space, so that the pH meter 9 can be better cleaned. The specific gas source pipe adopts a phi 8 gas source pipe (phi 8 is a pipe with the pipe orifice diameter of 8 mm).
On the basis of the above embodiment, the following improvements can be made:
preferably, the air inlet ends of the two air source pipes 6 are respectively connected to two ports of the quick-plug tee 11, and the other port of the quick-plug tee 11 is connected with compressed air. The other port of the quick-plug tee 11 is connected with compressed air through a two-position three-way electromagnetic valve 12. The two-position three-way electromagnetic valve 12 can be arranged in a DCS distribution room, the power supply and the power loss are controlled by a DCS relay, the two-position three-way electromagnetic valve 12 controls the on-off of compressed air through a DCS program, the on-off time of the compressed air is controlled by the DCS program, purging and measuring time is flexibly set according to the field use condition, the intermittent washing of the pH meter is realized, namely, sampling and purging are carried out intermittently without mutual influence.
Preferably, the air outlet ends of the two air source pipes 6 have a height difference, the air outlet end of one air source pipe 6 corresponds to the probe part of the pH meter 9, and the air outlet end of the other air source pipe 6 is arranged close to the upper part. The air outlet ends of the two air source pipes 6 can be designed into an arc shape, the arc shape bends to form corresponding radian so that the air outlet direction of the air outlet ends is opposite to the pH meter 9, the two air source pipes 6 can also be designed to be positioned at two sides of the pH meter 9, the air outlet end of one air source pipe 6 is opposite to the position of the probe at the lower end of the pH meter 9, dirt at the position of the probe is specially cleaned, the other air outlet end is slightly short in length, the position of the air outlet end is arranged close to the upper part, for example, the dirt on the pH meter 9 can be cleaned corresponding to the middle part of the pH meter 9, so that height difference exists, vortex can be better formed for blowing and blowing, if the height. The air outlet ends of the two air source pipes are also provided with angle differences, and the air outlet direction angles of the air outlet ends are different by 180 degrees, so that the purging range is more comprehensive. Specifically, the two gas source tubes 6 may be respectively disposed on two opposite sides of the pH meter 9, wherein the gas outlet direction of the gas outlet end of one of the gas source tubes 6 faces the probe portion at the lower end of the pH meter 9, the level faces one side, the gas outlet direction of the gas outlet end of the other gas source tube 6 faces the middle portion of the pH meter 9, the level faces the other side, and the gas outlet directions of the two gas outlet ends differ by 180 degrees.
In another embodiment, the mounting base is hollow and provided with a mounting plate, the lower end of the mounting base is connected with a sealing cover, and a sealing chamber is formed in the region between the mounting plate and the sealing cover in the mounting base.
On the basis of the above embodiment, the following improvements can be made:
preferably, the mounting plate is provided with a mounting hole 7 for mounting the pH meter 9 and a through hole through which the gas supply pipe 6 passes. The mounting holes 7 can be designed as threaded holes, the upper end of the pH meter 9 is hermetically connected to the mounting plate, the main body and the probes at the lower end are both positioned in the sealed chamber, and the size, number and position of the through holes correspond to those of the gas source pipes 6, according to the above embodiment, there are two gas source pipes 6 respectively on both sides of the pH meter 9, and those through holes are also set to be two respectively on both sides of the mounting holes 7. Correspondingly, two through holes for two air source pipes 6 to pass through are also arranged on the side surface of the rain-proof cover 1, and the two air source pipes 6 are inserted into the rain-proof cover 1 from the two through holes, bent downwards to pass through the connecting cylinder 4 and extended into the sealed cavity. The hole diameters of the through holes and the through holes can be set to be about 2 cm.
Preferably, the sealing cover is provided with a measuring liquid inlet hole 10, and the side wall of the mounting base is provided with an exhaust hole 8 communicated with the sealing chamber. The measuring liquid inlet hole 10 can be a through hole with the aperture of about 2cm, which is arranged in the middle of the sealing cover and is used for purging the intermittent measuring medium to enter the sealing chamber for sampling measurement or to be discharged from the sealing chamber. And the installation base sets up exhaust hole 8 corresponding to the lateral wall of sealed cavity for the compressed air in the sealed cavity of discharging when blowing wash and measuring, specifically, can set up an exhaust hole 8 respectively in the both sides of lateral wall, the aperture is about 2 cm.
On the basis of all the above embodiments and extended technical solutions, the following improvements can be made: the rain-proof cover 1 is connected with the upper end of the connecting cylinder 4 through a rain-proof cover connecting coarse thread 2, and the mounting base is connected with the lower end of the connecting cylinder 4 through a base connecting coarse thread 5. The sealing cover is connected with the lower end of the mounting base through thick threads. Still be connected with mounting flange 3 that is used for fixed whole device on the connecting cylinder 4, specifically, mounting flange 3 is in the same place with the lateral wall welding of connecting cylinder 4 for fixed whole device.
The working process of the invention is as follows: a DCS program gives an opening command, a DCS relay is switched on, a two-position three-way electromagnetic valve 12 is electrified, compressed air sequentially passes through the two-position three-way electromagnetic valve 12 and a quick-insertion three-way valve 11 to enter two air source pipes 6, two strands of compressed air form a purging vortex in a relatively sealed cavity formed by a mounting base and a sealing cover, and the PH meter 9 is fully purged (redundant compressed air is discharged from an exhaust hole 8 and a measuring liquid inlet hole 10 at the bottom); when the purging time reaches the DCS set time, a DCS program gives a closing command, a DCS relay is disconnected, a two-position three-way electromagnetic valve 12 loses power, compressed air is not output from an air source pipe 6, a measurement medium starts to enter a sealed cavity from a measurement liquid inlet hole 10 at the bottom, compressed air in the sealed cavity is discharged from an exhaust hole 8, a PH meter 9 enters a working state, the PH value of the measurement medium is detected, a result is output, after the measurement state reaches the DCS set time, the next purging process is started after the measurement is finished, and the measurement medium is discharged from the measurement liquid inlet hole 10. The setting of the purging process and the measuring process time can be flexibly set by a DCS program according to the type of the on-site medium, the use condition and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The online automatic purging device for the pH meter is characterized by comprising a rainproof cover (1), a connecting cylinder (4), a mounting base and a gas source pipe (6), wherein the connecting cylinder (4) is vertically arranged, the rainproof cover (1) is connected with the upper end of the connecting cylinder (4), the mounting base is connected with the lower end of the connecting cylinder (4), a sealed chamber is arranged in the mounting base, a pH meter (9) is fixed in the sealed chamber, the gas inlet end of the gas source pipe (6) is connected with compressed air, and the gas outlet end of the gas source pipe (6) sequentially penetrates through the rainproof cover (1) and the connecting cylinder (4), extends into the sealed chamber in the mounting base and is opposite to the pH meter (9); the two air source pipes (6) are arranged in parallel, the air outlet ends of the two air source pipes (6) have height difference, the air outlet end of one air source pipe (6) corresponds to the probe part of the pH meter (9), and the air outlet end of the other air source pipe (6) is arranged close to the upper part; the air outlet ends of the two air source pipes (6) have an angle difference, and the air outlet direction angles of the air outlet ends have a 180-degree difference; the mounting base is hollow and is provided with a mounting plate, the lower end of the mounting base is connected with a sealing cover, and a sealing cavity is formed in the region between the mounting plate and the sealing cover in the mounting base; the sealing cover is provided with a measuring liquid inlet hole (10), and the side wall of the mounting base is provided with an exhaust hole (8) communicated with the sealing cavity.
2. The on-line automatic purging device for the pH meter according to claim 1, wherein the air inlet ends of the two air source pipes (6) are respectively connected to two ports of a quick-insertion tee joint (11), and the other port of the quick-insertion tee joint (11) is connected with compressed air.
3. The on-line automatic purging device for the pH meter according to claim 2, characterized in that the other port of the quick-plug tee (11) is connected with compressed air through a two-position three-way solenoid valve (12).
4. The on-line automatic purging device for the pH meter according to claim 1, wherein the mounting plate is provided with a mounting hole (7) for mounting the pH meter (9) and a through hole for passing a gas supply pipe (6).
5. The online automatic purging device for the pH meter according to any one of claims 1 to 4, wherein the rain-proof cover (1) is connected with the upper end of the connecting cylinder (4) through a rain-proof cover connecting coarse thread (2), and the mounting base is connected with the lower end of the connecting cylinder (4) through a base connecting coarse thread (5).
6. The on-line automatic purging device for the pH meter according to any one of claims 1 to 4, characterized in that a mounting flange (3) for fixing the whole device is further connected to the connecting cylinder (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359802.XA CN108548848B (en) | 2018-04-20 | 2018-04-20 | Online automatic device that blasts of pH meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359802.XA CN108548848B (en) | 2018-04-20 | 2018-04-20 | Online automatic device that blasts of pH meter |
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| CN108548848A CN108548848A (en) | 2018-09-18 |
| CN108548848B true CN108548848B (en) | 2021-04-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109439510A (en) * | 2018-11-12 | 2019-03-08 | 北京天极视讯科技发展有限公司 | A kind of meter probe protection cleaning device, gas-detecting device and Zymolysis Equipment |
| CN110201935A (en) * | 2019-04-19 | 2019-09-06 | 铜陵有色金属集团股份有限公司 | The intermittent flusher of pulp ph gauge and its application method based on automatic control |
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