CN112483709B

CN112483709B - Valve with intelligence location is prevented blockking up

Info

Publication number: CN112483709B
Application number: CN202011329806.7A
Authority: CN
Inventors: 胡斌; 刘荣霞; 邱琳熙; 吴连峰; 张啸; 周游
Original assignee: Jiangsu Boteway Fluid Technology Co ltd
Current assignee: Jiangsu Boteway Fluid Technology Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2022-07-12
Anticipated expiration: 2040-11-24
Also published as: CN112483709A

Abstract

The invention discloses an intelligent positioning and anti-blocking valve which comprises a positioner and a valve actuator, wherein the positioner comprises an air source purification unit, an air inlet for inputting an air source is formed in the air source purification unit, the air source purification unit is connected with an anti-blocking electrical conversion unit for controlling the valve actuator, the anti-blocking electrical conversion unit is connected with a circuit control unit through a control signal, and the circuit control unit is connected with a position feedback unit. Has the advantages that: the inside dry indicator of parcel of cotton that absorbs water can absorb the moisture in the air current to keep purifying the inside dry of casing, avoid the valve locator to damage, and when the clearance, through the heating mechanism that sets up, make its steam get into and purify the casing inside, to the cotton that absorbs water, dry indicator and the cotton that absorbs water carry out the heat drying, make it absorb water cotton, dry indicator and the cotton that absorbs water be dry operating condition, guaranteed parts such as cotton that absorbs water and absorb moisture for a long time and use.

Description

Valve with intelligence location is prevented blockking up

Technical Field

The invention relates to the field of valve positioning, in particular to an intelligent positioning and anti-blocking valve.

Background

The valve positioner is a main accessory of a control valve, and takes a valve rod displacement signal as an input feedback measurement signal, takes a controller output signal as a setting signal, compares the two signals, and changes the output signal of the actuator to enable the actuator to act when the two signals have deviation, so that the one-to-one correspondence relationship between the valve rod displacement and the controller output signal is established. Therefore, the valve positioner forms a feedback control system which takes the displacement of the valve rod as a measuring signal and takes the output of the controller as a setting signal. The manipulated variable of the control system is the output signal of the valve positioner to the actuator. Valve positioners matched with pneumatic actuators have universal intelligent valve positioner products at home and abroad at present, wherein the intelligent valve positioners are represented by intelligent valve positioner products of companies such as Siemens, ABB and the like, and in order to realize the universality of the intelligent valve positioners, the intelligent valve positioners mostly adopt electric conversion mechanisms such as nozzle baffles or piezoelectric valves to realize the control of the pressure or ventilation flow of the actuators so as to ensure the opening and closing speed of the valves and the response capability in the adjusting process. However, because the positioner adopts the electric conversion element with high precision, the internal gas path is long and the aperture is small, and the positioner has high requirements on the quality of a gas source. Along with the increase of smoke and dust generated by heat supply and combustion in the industrial process, the emission of automobile exhaust is increased, and the like, the content of particulate matters in the air is continuously increased, so that the phenomenon of abnormal work caused by blockage of an air inlet or an exhaust port of a piezoelectric valve can occur after the conventional pneumatic intelligent valve positioner is used for a period of time, and the service environments of the valve positioner and a valve are generally wet and easily damage the internal elements of the intelligent valve positioner.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The invention aims to provide a valve with intelligent positioning and anti-blocking functions, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a valve with intelligence location and prevent blockking up, includes locator and valve actuator, the locator includes air supply purification unit, be equipped with the air inlet of input air supply on the air supply purification unit, air supply purification unit connects and is used for controlling the electric conversion unit of preventing blockking up of valve actuator, prevent blockking up the electric conversion unit and be connected with circuit control unit through control signal, circuit control unit and position feedback unit are connected, be connected with impurity clearance unit on the air supply purification unit, air supply purification unit includes the purification casing, the air inlet material is the plastics shell that admits air, the purification casing with the air inlet is removable connections, the air inlet is close to the open-ended inner wall and is equipped with the ash collecting cover, the ash collecting cover is loudspeaker form, and the port department of ash collecting cover is connected with around being connected with wave type trachea, the inner wall of the wave-shaped air pipe is provided with a dust screen, the interior of the purifying shell is provided with a cavity, the inner wall of the purifying shell is provided with a cavity, the interior of the cavity is provided with a secondary filter screen, the inner wall of the setting cavity of the purifying shell is fixedly provided with a plurality of air guide pipes, the other ends of the air guide pipes are jointly fixed with a gas collecting hood, the outer wall of the gas collecting hood is fixedly contacted with the inner wall of the setting cavity, the inner wall of the setting cavity is stuck with absorbent cotton, the air guide pipes are communicated with the interior of the cavity, the interior of the setting cavity is respectively provided with a fiber filter screen, a filter plate, a grid with negative electricity, a filter screen with positive electricity and a carbon filter screen through support rods, the interior of the filter plate is filled with a drying indicator, the outer surface of the filter plate is provided with micropores, the interior of the filter plate is hollow, and the interior of the filter plate is stuck with absorbent cotton cloth, the dry indicator is filled and wrapped inside the water absorption cotton cloth, the purification shell comprises a rear end cover, a mounting plate is uniformly and fixedly arranged on the outer wall of the rear end cover, the mounting plate is fixedly connected with the purification shell through screws, the anti-blocking electrical conversion unit comprises an air pressure input passage, an air pressure output passage and an exhaust passage which are mutually communicated through working passages, the working passages are provided with connecting rods, the top ends of the connecting rods and the bottom ends of the connecting rods are respectively provided with a baffle, the connecting rods and the baffle respectively pass through a piezoelectric actuator, a filtering dustproof net is arranged inside the air pressure input passage, the impurity cleaning unit comprises a first check valve, an airtight air passage and a second check valve, the first check valve, the airtight air passage and the second check valve are sequentially connected, and the first check valve is connected with a filter screen with positive electricity in the air source purification unit, the second check valve is connected with an impurity removal air source, the impurity removal air source adopts high-pressure gas, the high-pressure gas is a fan, and the fan is connected with the heating mechanism.

Furthermore, an internal thread groove is formed in one end of the purification shell, and the air inlet is spirally inserted into the internal thread groove.

Furthermore, the joints of the air pressure input passage, the air pressure output passage, the exhaust passage and the working channel are connected by arc surfaces.

Furthermore, the air pressure input passage is connected with the air source purification unit, the air pressure output passage is connected with the valve positioner, the piezoelectric actuator is connected with the circuit control unit, and the piezoelectric actuator is made of piezoelectric ceramics.

Furthermore, a sealing ring is pasted at one end, located at the rear end cover, of the purification shell.

Furthermore, the circuit control unit comprises a signal acquisition circuit, the signal acquisition circuit is connected with a microprocessor, the microprocessor is connected with a PWM control circuit, the microprocessor is connected with a keyboard input circuit, a liquid crystal display circuit connected with the microprocessor is connected with a feedback output circuit of other control terminals, the PWM control circuit is a pulse width modulation control circuit, and the PWM control circuit is connected with the anti-blocking electrical conversion unit.

Further, purify on the casing lateral wall seted up with wave type trachea port assorted socket, wave type trachea's port inserts in the socket with purify inside the casing the cavity is linked together.

Further, the inside of the cavity and the inside of the setting cavity are not communicated with each other.

Further, the heating mechanism is a heating block arranged inside the air outlet pipe on the fan.

Furthermore, the wave-shaped air pipe is installed on the inner wall of the air inlet through a support rod.

Compared with the prior art, the invention has the following beneficial effects:

the circuit control unit receives an external setting signal, adjusts the ventilation volume of the anti-blocking electric conversion unit to achieve the aim of controlling the opening of the valve, before the gas enters the anti-blocking electric conversion unit, the gas is filtered and purified through the gas inlet and the purification shell on the gas source purification unit, the contaminated gas containing particles can be effectively prevented from entering the gas path of the anti-blocking intelligent valve positioner, the gas path is prevented from being blocked or reduced, the position feedback unit carries out signal acquisition on the current position of the valve to inform the circuit control unit whether to continuously control the electric regulation or not, the impurity cleaning unit can be opened under the condition of power failure to process the particles intercepted by the gas source purification unit, the fiber filter screen can filter particles with larger volume, such as suspended dust, microorganisms and the like, the negatively charged electric grid and the positively charged filter screen can respectively adsorb related particles with reverse polarity under the action of electrodes, the carbonaceous filter screen can absorb chemical gas, when the gas contains chemical components, the carbonaceous filter screen can effectively absorb the chemical gas to protect rear-end electrical equipment, power is required to be cut off when dust is cleaned, and the positively charged filter screen and the negatively charged grid are not charged and have no adsorption capacity, so that relevant particles adsorbed when the positively charged filter screen and the negatively charged grid are charged, and larger-volume particles filtered by the fiber filter screen can be blown out from the air inlet in the opposite direction;

dust particles firstly enter the air inlet, the dust collecting cover is arranged on the inner wall of the air inlet close to the opening, dust enters the wave-shaped air pipe through the dust collecting cover, the air pipe is wave-shaped, so that the length of the body is increased, the inner dust-proof net is more dense, a better dense effect is achieved, then the dust enters the cavity of the inner wall of the purifying shell, secondary filtration is carried out through the auxiliary filter net arranged inside the cavity, the auxiliary filter net carries out better dust filtration again, then the gas enters the setting cavity through the air duct and the gas collecting cover, then the gas passes through the fiber filter net, the filter plate, the electric grid with negative electricity, the filter net with positive electricity and the carbon filter net carry out filtration, adsorption and purification and other work, when the gas after entering contains moisture, the gas can be absorbed by the absorbent cotton, and when the gas flow passes through the filter plate, the absorbent cotton cloth is pasted on the inner wall of the filter plate, and the moisture absorption can be carried out, and the inside moisture in the dry indicator of parcel in the cotton that absorbs water can absorb the air current to keep purifying the inside drying of casing, avoid the valve locator to damage, and when the clearance, through the heating mechanism who sets up, make its steam get into and purify the casing inside, heat drying is carried out to cotton, dry indicator and the cotton that absorbs water to cotton that absorbs water, makes it absorb water cotton, dry indicator and the cotton that absorbs water be dry operating condition, has guaranteed parts such as the cotton that absorbs water and has absorbed the moisture for a long time and use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a valve with intelligent positioning and anti-clogging according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an air supply purification unit with an intelligently positioned and anti-clog valve, according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a wavy air tube with an intelligently positioned and anti-jamming valve, in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a purge housing having an intelligently positioned and anti-clog valve, according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a filter plate with intelligently positioned and anti-clog valves, according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the basic structure of an anti-jam electrical converter unit having an intelligently positioned and anti-jam valve, in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of the basic structure of a circuit control unit with an intelligently positioned and anti-jam valve, according to an embodiment of the invention;

fig. 8 is a schematic diagram of a trash cleaning unit with an intelligently positioned and jam resistant valve according to an embodiment of the present invention.

Reference numerals:

1. a gas source purification unit; 2. an air inlet; 3. an anti-clogging electrical conversion unit; 4. a circuit control unit; 5. a position feedback unit; 6. an impurity cleaning unit; 7. purifying the shell; 8. a dust collecting cover; 9. a wave-shaped air pipe; 10. a dust screen; 11. providing a cavity; 12. a cavity; 13. a secondary filter screen; 14. an air duct; 15. a gas-collecting hood; 16. absorbent cotton; 17. a fiber screen; 18. a filter plate; 19. an electrical grid; 20. filtering with a screen; 21. a carbonaceous filter screen; 22. a dryness indicator; 23. absorbent cotton cloth; 24. micropores; 25. a rear end cap; 26. mounting a plate; 27. a working channel; 28. a pneumatic pressure input passage; 29. an air pressure output passage; 30. an exhaust passage; 31. a connecting rod; 32. a baffle plate; 33. a piezoelectric actuator; 34. filtering a dust screen; 35. a signal acquisition circuit; 36. a microprocessor; 37. a PWM control circuit; 38. a keyboard input circuit; 39. a liquid crystal display circuit; 40. a feedback output circuit; 41. a first check valve; 42. sealing the gas circuit; 43. a second check valve; 44. a fan; 45. an internal thread groove; 46. a seal ring; 47. and (4) inserting the socket.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

in order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the present invention is not limited to the specific embodiments disclosed in the following description.

The first embodiment is as follows:

referring to fig. 1 to 8, the valve with intelligent positioning and anti-clogging according to the embodiment of the present invention includes a positioner and a valve actuator, the positioner includes an air source purifying unit 1, an air inlet 2 for inputting an air source is disposed on the air source purifying unit 1, the air source purifying unit 1 is connected to an anti-clogging electrical conversion unit 3 for controlling the valve actuator, the anti-clogging electrical conversion unit 3 is connected to a circuit control unit 4 through a control signal, the circuit control unit 4 is connected to a position feedback unit 5, the air source purifying unit 1 is connected to an impurity cleaning unit 6, the air source purifying unit 1 includes a purifying housing 7, the air inlet 2 is made of a plastic air inlet housing, the purifying housing 7 is detachably connected to the air inlet 2, and an ash collecting cover 8 is disposed on an inner wall of the air inlet 2 near an opening, the dust collecting cover 8 is horn-shaped, the port of the dust collecting cover 8 is connected with a wave-shaped air pipe 9 in a surrounding manner, a dust screen 10 is installed on the inner wall of the wave-shaped air pipe 9, a setting cavity 11 is arranged in the purifying shell 7, a cavity 12 is arranged in the inner wall of the purifying shell 7, an auxiliary filter screen 13 is installed in the cavity 12, a plurality of air guide pipes 14 are fixedly arranged on the inner wall of the setting cavity 11 of the purifying shell 7, a gas collecting cover 15 is fixedly arranged at the other end of each air guide pipe 14, the outer wall of the gas collecting cover 15 is fixedly contacted with the inner wall of the setting cavity 11, absorbent cotton 16 is adhered to the inner wall of the setting cavity 11, the air guide pipes 14 are communicated with the inner part of the cavity 12, and the setting cavity 11 is internally provided with a fiber filter screen 17, a filter plate 18, a negatively charged electric grid 19, a positively charged filter screen 20 and a carbonaceous filter screen 21 through supporting rods respectively, the filter plate 18 is internally filled with a drying indicator 22, the outer surface of the filter plate 18 is provided with micropores 24, the interior of the filter plate 18 is hollow, the interior of the filter plate 18 is pasted with absorbent cotton cloth 23, the drying indicator 22 is filled and wrapped in the absorbent cotton cloth 23, the purifying shell 7 comprises a rear end cover 25, the outer wall of the rear end cover 25 is uniformly and fixedly provided with a mounting plate 26, the mounting plate 26 is fixedly connected with the purifying shell 7 through screws, the anti-blocking electric conversion unit 3 comprises an air pressure input passage 28, an air pressure output passage 29 and an exhaust passage 30 which are mutually communicated with a working passage 27, the working passage 27 is provided with a connecting rod 31, the top end of the connecting rod 31 and the bottom end of the connecting rod 31 are respectively provided with a baffle 32, the connecting rod 31 and the baffle 32 respectively pass through a piezoelectric actuator 33, and a filtering dustproof net 34 is arranged in the air pressure input passage 28, impurity clearance unit 6 includes first check valve 41, airtight gas circuit 42 and second check valve 43, first check valve 41 airtight gas circuit 42 with second check valve 43 connects gradually, first check valve 41 with filter screen 20 that the air supply purification unit 1 was electrified is connected, second check valve 43 is connected with the impurity removal air supply, the impurity removal air supply adopts high-pressure gas, high-pressure gas is fan 44, fan 44 connects heating mechanism.

Example two:

referring to fig. 4, for the purifying housing 7, an inner threaded groove 45 is formed at one end of the purifying housing 7, and the air inlet 2 is spirally inserted into the inner threaded groove 45.

Through the scheme of the invention, the beneficial effects are as follows: the air inlet 2 is spirally inserted in the internal thread groove 45, so that the air inlet 2 is spirally connected with the purifying shell 7, the installation is convenient, and the disassembly is simple.

Example three:

referring to fig. 6, for the air pressure input passage 28, the joints of the air pressure input passage 28, the air pressure output passage 29, the exhaust passage 30 and the working channel 27 are all connected by an arc surface.

Through the scheme of the invention, the beneficial effects are as follows: atmospheric pressure input path 28 atmospheric pressure output path 29 exhaust path 30 with the junction of working channel 27 all adopts the arcwall face to connect, avoids impurity in the inside corner deposit of gas circuit, and atmospheric pressure input path 28 internally mounted has and filters dust screen 34, can block the dust, prevents effectively that the dust from getting into.

Example four:

referring to fig. 6, for the air pressure input passage 28, the air pressure input passage 28 is connected to the air source purifying unit 1, the air pressure output passage 29 is connected to the valve positioner, the piezoelectric actuator 33 is connected to the circuit control unit 4, and the piezoelectric actuator 33 is made of piezoelectric ceramics.

Example five:

referring to fig. 4, for the purifying housing 7, a sealing ring 46 is adhered to one end of the purifying housing 7 located at the rear end cover 25.

Through the scheme of the invention, the beneficial effects are as follows: the sealing ring 46 is adhered to one end, located at the rear end cover 25, of the purification shell 7, the sealing ring 46 contacts with the rear end cover 25, so that the purification shell 7 and the rear end cover 25 are connected more hermetically, air leakage is avoided, and the disassembly and the assembly are convenient.

Example six:

referring to fig. 7, for the circuit control unit 4, the circuit control unit 4 includes a signal acquisition circuit 35, the signal acquisition circuit 35 is connected to a microprocessor 36, the microprocessor 36 is connected to a PWM control circuit 37, the microprocessor 36 is connected to a keyboard input circuit 38, a liquid crystal display circuit 39 connected to the microprocessor 36, the microprocessor 36 is connected to a feedback output circuit 40 of another control terminal, the PWM control circuit 37 is a pulse width modulation control circuit, and the PWM control circuit 37 is connected to the anti-blocking electrical conversion unit 3.

Through the scheme of the invention, the beneficial effects are as follows: control signals are input to the microprocessor 36 through the keyboard input circuit 38, all parameters in the microprocessor 36 are displayed through the liquid crystal display circuit 39, the circuit control unit 4 receives external 4-20 mA current setting signals, the current signals are converted into voltage signals 3.3V through the power circuit to be supplied to the single chip microcomputer system and converted into voltage signals 24V to be supplied to the anti-blocking electric conversion unit 3 for power supply, on the other hand, the current signals are read into valve position set values through the signal acquisition circuit in the microprocessor, the microprocessor 36 controls the PWM control circuit after reading the set position values to perform on-off regulation on the anti-blocking electric conversion unit 3, and output gas operates a valve actuator.

Example seven:

referring to fig. 3-4, for the purifying shell 7, a socket 47 matching with the port of the wave-shaped air tube 9 is formed on the sidewall of the purifying shell 7, and the port of the wave-shaped air tube 9 is inserted into the socket 47 and is communicated with the cavity 12 inside the purifying shell 7.

Through the scheme of the invention, the beneficial effects are as follows: the port of the wave-shaped air pipe 9 is inserted into the socket 47, and the inside of the wave-shaped air pipe 9 is communicated with the inside of the cavity 12 at the moment, so that air is guided conveniently.

Example eight:

referring to fig. 2, for the cavity 12, the inside of the cavity 12 and the inside of the setting chamber 11 are not communicated with each other.

Through the scheme of the invention, the beneficial effects are as follows: the inside of the cavity 12 and the inside of the setting cavity 11 are not communicated with each other, which indicates that after the wave-shaped air pipe 9 is inserted into the socket 47, the wave-shaped air pipe 9 is communicated with the inside of the cavity 12, so that the gas in the wave-shaped air pipe 9 cannot be directly discharged into the setting cavity 11.

Example nine:

referring to fig. 2 and 8, for the heating mechanism, the heating mechanism is a heating block disposed inside the air outlet pipe of the blower 44.

Through the scheme of the invention, the beneficial effects are as follows: the fan 44 generates wind to blow into the setting cavity 11, and the heating block heats the blown-in gas, so that the absorbent cotton 16, the drying indicator 22 and the absorbent cotton 23 are heated and dried, the absorbent cotton 16, the drying indicator 22 and the absorbent cotton 23 are in a dry working state, and the absorbent cotton and other parts are guaranteed to be used for absorbing moisture for a long time.

Example ten:

referring to fig. 2-3, for the wave-shaped air tube 9, the wave-shaped air tube 9 is mounted on the inner wall of the air inlet 2 by a strut.

For the convenience of understanding the technical solution of the present invention, the following detailed description will be made of the working principle or the operation mode of the present invention in the practical process:

in practical application, after receiving an external setting signal, the circuit control unit 4 adjusts the ventilation volume of the anti-clogging electrical conversion unit 3 to achieve the purpose of controlling the opening of the valve, before the gas enters the anti-clogging electrical conversion unit 3, the gas is filtered and purified through the gas inlet 2 and the purifying shell 7 on the gas source purifying unit 1, so that the contaminated gas containing particulate matters can be effectively prevented from entering the gas path of the anti-clogging intelligent valve positioner to avoid the gas path from being blocked or reduced, the position feedback unit 5 collects signals of the current position of the valve to inform the circuit control unit 4 whether to continuously control electrical adjustment, the impurity cleaning unit 6 can be opened under the condition of power failure to treat the particulate matters intercepted by the gas source purifying unit 1, the fiber filter screen 17 can filter particles with larger volume, such as suspended dust, microorganisms and the like, the negatively charged electric grid 19 and the positively charged filter screen 20 can respectively adsorb related particles with opposite polarities under the action of electrodes, the carbonaceous filter screen 21 can absorb chemical gas, when the gas contains chemical components, the carbonaceous filter screen 21 can effectively absorb the chemical gas to protect rear-end electrical equipment, power is required to be cut off when dust is cleaned, and the positively charged filter screen 20 and the negatively charged grid 19 are not charged and have no adsorption capacity, so that relevant particles adsorbed when the positively charged filter screen 20 and the negatively charged grid 19 are charged, and large-volume particles filtered by the fiber filter screen 17 can be blown out in the reverse direction from the air inlet, therefore, high-pressure gas is adopted by an impurity-removing gas source to blow out the particles, the micro-dust and the like adsorbed by the gas source purification unit in the reverse direction from the air inlet 2, so that the simple cleaning effect is achieved, the gas source purification unit 1 is arranged in the equipment, the integrity and the tightness of a gas circuit are required to be kept, and after the particles are adsorbed, frequent cleaning is not recommended;

dust particles firstly enter the air inlet 2, an ash collecting cover 8 is arranged on the inner wall of the air inlet 2 close to the opening, the dust enters a wave-shaped air pipe 9 through the ash collecting cover 8, because the air pipe is wave-shaped, thereby increasing the length of the body, the inner dust screen 10 is more dense, the better dense effect is achieved, then the dust enters the cavity 12 of the inner wall of the purifying shell 7, secondary filtration is carried out through the auxiliary filter screen 13 arranged inside the cavity 12, the auxiliary filter screen 13 carries out better dust filtration again, then the gas enters the setting cavity 11 through the air duct 14 and the air collecting cover 15, then the work of filtration, adsorption and purification and the like is carried out through the fiber filter screen 17, the filter screen 18, the electric grid 19 with negative electricity, the filter screen 20 with positive electricity and the carbon filter screen 21, when the gas after entering contains moisture, the gas can be absorbed by the absorbent cotton 16, and when the gas flow passes through the filter screen 18, paste at 18 inner walls of filter and have the cotton 23 that absorbs water, can absorb the moisture, and absorb water the moisture in the inside dry indicator 22 of parcel of cotton 23 can absorb the air current, thereby keep purifying the inside dry of casing 7, avoid the valve locator to damage, and when the clearance, through the heating mechanism who sets up, make its steam get into and purify inside the casing 7, absorb water cotton 16, dry indicator 22 and the cotton 23 that absorbs water carry out the drying, make it absorb water cotton 16, dry indicator 22 and the cotton 23 that absorbs water be dry operating condition, guaranteed parts such as cotton that absorb water and used for a long time absorbing the moisture.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The intelligent positioning and anti-blocking valve is characterized by comprising a positioner and a valve actuator, wherein the positioner comprises an air source purification unit (1); be equipped with air inlet (2) of input air supply on air supply purification unit (1), air supply purification unit (1) is connected and is used for controlling the electric conversion unit (3) of preventing blockking up of valve actuator, prevent blockking up electric conversion unit (3) and be connected with circuit control unit (4) through control signal, circuit control unit (4) are connected with position feedback unit (5), be connected with impurity cleaning unit (6) on air supply purification unit (1), air supply purification unit (1) is including purifying casing (7), air inlet (2) material is the plastics shell of admitting air, purify casing (7) with air inlet (2) are for dismantling the connection, air inlet (2) are close to the open-ended inner wall and are equipped with collection ash cover (8), collection ash cover (8) are loudspeaker form, just the port department of collection ash cover (8) encircles and is connected with wave type trachea (9), the dust screen (10) is installed on the inner wall of the wave-shaped air pipe (9), the inner part of the purifying shell (7) is provided with a cavity (11), a cavity (12) is arranged in the inner wall of the purifying shell (7), an auxiliary filter screen (13) is installed in the cavity (12), the inner wall of the setting cavity (11) of the purifying shell (7) is fixedly provided with a plurality of air guide pipes (14), one ends of the air guide pipes (14) are jointly and fixedly provided with an air collecting hood (15), the outer wall of the air collecting hood (15) is fixedly contacted with the inner wall of the setting cavity (11), the inner wall of the setting cavity (11) is pasted with absorbent cotton (16), the air guide pipes (14) are communicated with the inner part of the cavity (12), the inner part of the setting cavity (11) is respectively provided with a fiber filter screen (17), a filter plate (18), a negatively charged electric grid (19), a positively charged filter screen (20) and a filter screen (21) through support rods, the utility model discloses a solar energy filter, including filter (18), filter (18) inside packing has dry indicator (22), micropore (24) have been seted up to filter (18) surface, just filter (18) inside is empty form, filter (18) inside paste has water-absorbing cotton cloth (23), dry indicator (22) are filled the parcel and are in water-absorbing cotton cloth (23) inside, it is including being equipped with rear end cap (25) to purify casing (7), rear end cap (25) outer wall is even fixed and is equipped with mounting panel (26), mounting panel (26) through the screw with purify casing (7) fixed connection, prevent blockking up electric conversion unit (3) including atmospheric pressure input path (28), atmospheric pressure output path (29) and exhaust passage (30) that service aisle (27) communicate each other, service aisle (27) are equipped with connecting rod (31), connecting rod (31) top with connecting rod (31) bottom is equipped with baffle (32) respectively, the circuit control unit (4) is connected with a piezoelectric actuator (33), a filtering dust screen (34) is arranged in the air pressure input passage (28), the impurity cleaning unit (6) comprises a first one-way valve (41), a closed air path (42) and a second one-way valve (43), the first one-way valve (41), the closed air path (42) and the second one-way valve (43) are connected in sequence, the first one-way valve (41) is connected with a filter screen (20) with positive electricity in the air source purification unit (1), the second one-way valve (43) is connected with an impurity removal gas source which adopts high-pressure gas, the high-pressure gas is blown out by a fan (44), the fan (44) is connected with a heating mechanism, an inner threaded groove (45) is formed in one end of the purification shell (7), and the air inlet (2) is spirally inserted into the inner threaded groove (45).

2. A valve with intelligent positioning and anti-clogging according to claim 1, characterized in that the joints of the pneumatic input passage (28), the pneumatic output passage (29), the exhaust passage (30) and the working channel (27) are all connected by an arc surface.

3. The valve with intelligent positioning and blockage prevention according to claim 1, characterized in that the air pressure input passage (28) is connected with the air source purification unit (1), the air pressure output passage (29) is connected with a valve positioner, and the piezoelectric actuator (33) is made of piezoelectric ceramics.

4. The intelligent positioning and anti-clogging valve according to claim 1, characterized in that the purifying shell (7) is adhered with a sealing ring (46) at one end of the rear end cover (25).

5. The valve with intelligent positioning and anti-clogging functions as claimed in claim 1, wherein the circuit control unit (4) comprises a signal acquisition circuit (35), the signal acquisition circuit (35) is connected with a microprocessor (36), the microprocessor (36) is connected with a PWM control circuit (37), the microprocessor (36) is connected with a keyboard input circuit (38), the microprocessor (36) is connected with a liquid crystal display circuit (39), the microprocessor (36) is connected with a feedback output circuit (40) of other control terminals, the PWM control circuit (37) is a pulse width modulation control circuit, and the PWM control circuit (37) is connected with the anti-clogging electric conversion unit (3).

6. The intelligent positioning and anti-clogging valve according to claim 1, characterized in that a socket (47) matching with the port of the wave-shaped air pipe (9) is formed on the side wall of the purifying shell (7), and the port of the wave-shaped air pipe (9) is inserted into the socket (47) and communicated with the cavity (12) inside the purifying shell (7).

7. The valve with intelligent positioning and anti-clogging functions as claimed in claim 1, characterized in that said heating mechanism is a heating block arranged inside an air outlet pipe on said blower (44).

8. A valve with intelligent positioning and anti-clogging according to claim 1, characterized in that the wave-shaped air pipe (9) is mounted on the inner wall of the air inlet (2) through a strut.