CN113788321A - Automatic powder discharge valve and online monitoring and obstacle clearing control system thereof - Google Patents
Automatic powder discharge valve and online monitoring and obstacle clearing control system thereof Download PDFInfo
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- CN113788321A CN113788321A CN202111199403.XA CN202111199403A CN113788321A CN 113788321 A CN113788321 A CN 113788321A CN 202111199403 A CN202111199403 A CN 202111199403A CN 113788321 A CN113788321 A CN 113788321A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
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Abstract
The invention discloses an automatic powder discharge valve and an on-line monitoring and obstacle clearing control system thereof, wherein the automatic powder discharge valve comprises a discharge pipe (1), a valve cone (2), a valve cylinder (3), a valve cover (4), a spring assembly (5), an annular plate (6), a large maintenance flange and a flange cover (7), a feed pipe (8) and a discharge pipe flange (17); the spring assemblies (5) respectively comprise a lower hook ring (51), a tension spring (52), an upper hook ring (53), a nut (54) and a stud (55); the on-line monitoring and obstacle clearing control system is connected to an automatic powder discharging valve (110) and comprises a monitoring control module, a remote transmission control module and an obstacle clearing control module. The invention can realize the automatic discharging of a dust remover or a conveying bin, and endows the automatic powder discharging valve with the functions of measuring the flow of the powder material, monitoring the flowing condition of the powder material by on-line analysis and clearing obstacles after the powder material has problems in the discharging process in real time.
Description
Technical Field
The invention relates to gas-solid separation and powder conveying equipment, in particular to an automatic powder discharge valve and an online monitoring and obstacle clearing control system thereof.
Background
In the fields of gas-solid separation and powder and particle transportation, various dust collectors (such as gravity settling dust collectors, cyclone dust collectors, bag-type dust collectors, electrostatic dust collectors, and the like) or transportation bins need to discharge collected solid dust or particles out of the dust collectors. When the dust remover normally works under the positive pressure working condition, the gas medium in the dust remover can have the conditions of high temperature, flammability and explosiveness or toxic and harmful components, and if the solid dust or the granular materials are directly discharged out of the dust remover, the gas medium can be discharged into the environment to cause safety production accidents. When the dust remover normally works under the negative pressure working condition, air can be sucked into the dust remover when dust or granular materials are discharged out of the dust remover, so that the risk of safety accidents is caused, and the dust remover can not discharge materials normally or the separation efficiency of the dust remover is obviously reduced due to the fact that air is sucked.
The discharge valve is the fundamental guarantee that various dust removers or transport feed bin maintain continuous stable work, and dust remover or transport feed bin all form a complete set and are provided with discharge valve mechanism usually, and the discharge valve must play powder row material and the sealed dual function of "lock gas", and common has ball valve, butterfly valve, push-pull valve, rotary valve (or star type valve) and flap valve etc. these valves both can be manual and electronic, all have widely used in many industrial fields. However, the discharge valves can not realize fully automatic and autonomous operation no matter manually or electrically, and the electric or pneumatic control is required to be adopted in order to realize the continuous discharging requirement of the dust remover; meanwhile, most discharge valves do not have the functions of metering, monitoring, barrier removal and the like.
The utility model Chinese utility model patent ZL201821057351.6 discloses a rotatory unloading valve, including the valve body, feeding valve port and ejection of compact valve port, the top of valve body is equipped with the feeding mouth, and the bottom is equipped with ejection of compact mouth, the top of feeding mouth and ejection of compact mouth is equipped with the arch, be equipped with on feeding valve port and the ejection of compact valve port with protruding assorted recess, one side of valve body is equipped with driving motor, driving motor's output shaft passes through the shaft coupling and is connected with the internal drive of speed reducer, the output and the pivot fixed connection of speed reducer, there is the rotor plate through bolt and nut spiro union in the pivot. The blanking valve has the defects that the blanking valve needs to be driven by a motor and consumes energy, and meanwhile, the automatic and autonomous discharging operation cannot be realized, and the functions of metering, monitoring, obstacle clearing and the like are not realized.
The utility model patent ZL201720507046.1 discloses a double-deck electronic flap valve, including last casing and lower casing, go up the casing and have the flap axle respectively with casing upper end down, the flap is equipped with respectively down to turn over the board, go up casing and lower casing side and still be connected with the weight through the hammer stem respectively, the flap axle of going up casing and casing upper end down is connected with the associated mode speed reducer through the vertical axis respectively, lower casing side is equipped with the speed reducer frame, the associated mode speed reducer is fixed on the speed reducer frame, be provided with infrared detector on turning over the board, infrared detector circuit connection has the controller, the controller setting is in speed reducer frame upper end and has the liquid crystal analysis screen. The blanking valve also needs to be driven by a motor and consumes energy, can not realize automatic discharging operation, and has no functions of metering, obstacle clearing and the like.
Disclosure of Invention
One of the objectives of the present invention is to provide an automatic powder discharging valve, which can automatically and stably discharge solid dust or granular materials collected by various dust collectors or conveying bins, ensure that the granular materials prevent the gas inside the dust collectors from leaking outwards during the continuous discharging process, provide good "gas-locking" sealing performance, and prevent external gas from flowing into the discharging valve.
The invention also aims to provide an on-line monitoring and obstacle clearing control system of the automatic powder discharge valve, which realizes the metering function of solid powder and particle flow in the discharge valve, the monitoring function of on-line analysis of the flow condition of powder and particle materials and the obstacle clearing function of real-time treatment of the powder and particle materials after problems occur in the discharging process by arranging a plurality of measuring points, does not need energy consumption or manual intervention in operation, ensures the separation efficiency of a dust remover, and can meet the requirements of production automation and long-period stable operation of the dust remover.
The invention is realized by the following steps:
an automatic powder discharge valve comprises a discharge pipe, a valve cone, a valve cylinder body, a valve cover, a spring assembly, a ring plate, a large overhaul flange, a flange cover, a feed pipe and a discharge pipe flange; the discharge pipe flange, the discharge pipe, the valve cone, the valve cylinder body, the large overhauling flange and the flange cover are coaxially connected from bottom to top to form a discharge valve outer shell; the ring plate is of a circular structure and is annularly arranged on the outer wall of the lower part of the feeding pipe, the spring assemblies are connected between the ring plate and the outer wall of the bottom of the valve cover, and the plurality of groups of spring assemblies are circumferentially arranged on the outer side of the feeding pipe, so that the valve cover is covered on the lower end of the feeding pipe in a sealing manner to form a valve core of the discharge valve; the valve core of the discharge valve is coaxially arranged in the outer shell of the discharge valve, and the upper end of the feeding pipe upwards penetrates through the large overhauling flange and the flange cover;
each group of spring assemblies comprises a lower hook ring, a tension spring, an upper hook ring, a nut and a stud; the lower end of the tension spring is connected to the outer wall of the bottom of the valve cover through a lower hook ring, and the upper end of the tension spring is connected with the lower end of the stud through an upper hook ring; screw holes are formed on the ring plate, so that the studs are screwed on the ring plate through a pair of nuts.
The valve cover is of a conical or spherical-crown-shaped structure with a high middle part and a low periphery, and a sealing layer is arranged on the surface of the valve cover, so that the valve cover is hermetically attached to the lower end edge of the feeding pipe through the sealing layer.
The vertex angle of the valve cover with the conical structure is alpha, the value range of the alpha is 25-75 degrees, and the ratio of the diameter D1 of the bottom surface of the conical valve cover to the diameter D0 of the feeding pipe is D1/D0 which is 1.25-1.40.
The ratio of the diameter D1 of the bottom surface of the valve cover of the spherical cap structure to the diameter D0 of the feeding pipe is D1/D0-1.40, and the ratio of the diameter 2R of the valve cover of the spherical cap structure to the diameter D1 of the bottom surface is 2R/D1-1.45-1.80.
A limiting rod is arranged in the valve cylinder body, the limiting rod is of a cross structure and is coaxially arranged under the valve cover, namely, the plane of the limiting rod is vertical to the central axis of the valve core of the discharge valve;
the vertical distance between the bottom surface of the valve cover and the plane where the limiting rod is located is H1, and D0 is equal to or larger than H1 and equal to or smaller than 1.25X D1, wherein D0 is the diameter of the feeding pipe, and D1 is the diameter of the bottom surface of the valve cover.
An on-line monitoring and obstacle clearing control system of an automatic powder discharge valve is connected to the automatic powder discharge valve, a pressure sampling pipe is connected to the automatic powder discharge valve, and the on-line monitoring and obstacle clearing control system comprises a stop valve, a pressure gauge, a flowmeter, a normally closed needle valve, a central controller, a pressure transmitter and a check valve; the flow meter and the check valve are connected in series to form a monitoring control module, the flow meter is externally connected with a low-pressure air source through a stop valve, and the check valve is connected with the pressure tapping pipe; the central controller is connected with the pressure transmitter to form a remote control module, and the pressure transmitter is connected to the pressure sampling pipe through a normally open needle valve; the normally closed needle valve is externally connected with a high-pressure air source to form an obstacle clearing control module and is connected to the pressure tapping pipe; the stop valve is connected with a pressure gauge through a normally open needle valve, the pressure transmitter is connected with the pressure gauge through a normally open needle valve, and the normally closed needle valve is connected with the pressure gauge.
The automatic powder discharging valve is connected with at least one pressure taking pipe, and each pressure taking pipe is provided with a monitoring control module, a remote transmission control module and a barrier clearing control module.
The pressure tapping pipes comprise a first pressure tapping pipe, a second pressure tapping pipe, a third pressure tapping pipe and a fourth pressure tapping pipe; the first pressure sampling pipe is connected to the bottom of the feeding pipe and penetrates through the large overhauling flange and the flange cover upwards, and the second pressure sampling pipe is connected to the top of the feeding pipe and is positioned above the valve cylinder body; the upper end of the feeding pipe is coaxially connected with a dipleg through a feeding pipe flange, the dipleg flange is installed at the top of the dipleg, the third pressure-taking pipe is connected to the middle of the dipleg, and the fourth pressure-taking pipe is connected to the upper part of the dipleg.
The first pressure pipe, the second pressure pipe, the third pressure pipe and the fourth pressure pipe all incline to set up, the first pressure pipe, the second pressure pipe, the third pressure pipe and the fourth pressure pipe are got to the pressure and are got the contained angle between the axial of pressing pipe and inlet pipe and be beta, the value range of beta is 20-90 ═ for beta.
The height difference of the installation positions of the first pressure sampling pipe and the second pressure sampling pipe is H2, and the value range of H2 is 500-2000 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the automatic powder discharging valve is provided with a plurality of groups of spring assemblies which are circumferentially arranged, so that the sealing layer of the valve cover can be tightly attached to the lower end pipe opening of the feeding pipe under the action of the tension spring, the automatic powder discharging valve has good air locking sealing performance, the lower end pipe opening of the feeding pipe and the valve cover can be controlled to be opened independently and flexibly, the automatic powder discharging valve can be automatically operated in the whole discharging process, and power drive and energy consumption are not needed.
2. The on-line monitoring and obstacle clearing control system is provided with a plurality of measuring points, and the mass flow of the powder and the granular material can be measured through the pressure difference of the two measuring points on the feeding pipe, so that the on-line monitoring and obstacle clearing control system has important significance for the optimized design and the actual production guidance operation of various dust collectors or conveying bins.
3. The on-line monitoring and obstacle clearing control system has the advantages that the detection control module and the remote transmission control module are arranged, so that the automatic powder discharge valve has the monitoring function of analyzing the flowing condition of powder materials on line, and meanwhile, the obstacle clearing control module is arranged, so that the automatic powder discharge valve has the capability of processing various discharge faults in real time.
Drawings
FIG. 1 is a sectional view of an automatic powder discharge valve according to the present invention;
FIG. 2 is a front view of a spring assembly in the automatic powder discharge valve of the present invention;
FIG. 3 is a top view of a ring plate of the automatic powder discharging valve of the present invention;
FIG. 4 is a sectional view (conical shape) of a valve cover in the automatic powder discharging valve of the present invention;
FIG. 5 is a sectional view (spherical cap shape) of a valve cover in the automatic powder discharging valve of the present invention;
FIG. 6 is a top view of a limiting rod of the automatic powder discharging valve of the present invention;
fig. 7 is a control schematic diagram of an on-line monitoring and obstacle clearing control system of the automatic powder discharging valve.
In the figure, 110 powder automatic discharge valve, 1 discharge pipe, 2 valve cone, 3 valve cylinder, 4 valve covers, 41 sealing layers, 5 spring components, 51 lower shackle, 52 tension spring, 53 upper shackle, 54 nut, 55 stud, 6 annular plate, 7 overhaul large flange and flange cover, 8 feed pipe, 9 feed pipe flange, 10 dipleg, 11 dipleg flange, 12 fourth pressure sampling pipe, 13 third pressure sampling pipe, 14 second pressure sampling pipe, 15 first pressure sampling pipe, 16 limiting rod, 17 discharge pipe flange, 101 steel pipe, 102 stop valve, 104 pressure gauge, 105 flowmeter, 106 normally closed needle valve, 107 central controller, 108 pressure transmitter, 109 check valve.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to the attached drawing 1, the automatic powder discharge valve comprises a discharge pipe 1, a valve cone 2, a valve cylinder body 3, a valve cover 4, a spring assembly 5, an annular plate 6, a large overhaul flange and a flange cover 7, a feed pipe 8 and a discharge pipe flange 17; the discharge pipe flange 17, the discharge pipe 1, the valve cone 2, the valve cylinder body 3 and the large overhauling flange and the flange cover 7 are coaxially connected from bottom to top to form a discharge valve outer shell; the ring plate 6 is of a circular structure and is annularly arranged on the outer wall of the lower part of the feeding pipe 8, the spring assemblies 5 are connected between the ring plate 6 and the outer wall of the bottom of the valve cover 4, and a plurality of groups of spring assemblies 5 are circumferentially arranged on the outer side of the feeding pipe 8, so that the valve cover 4 is covered on the lower end of the feeding pipe 8 in a sealing manner to form a valve core of the discharge valve; the valve core of the discharge valve is coaxially arranged in the outer shell of the discharge valve, and the upper end of the feeding pipe 8 upwards penetrates through the large flange and the flange cover 7 for maintenance.
Referring to fig. 2 and 3, each set of spring assemblies 5 includes a lower hook 51, a tension spring 52, an upper hook 53, a nut 54 and a stud 55; the lower end of a tension spring 52 is connected to the outer wall of the bottom of the valve cover 4 through a lower shackle 51, and the upper end of the tension spring 52 is connected with the lower end of a stud 55 through an upper shackle 53; the ring plate 6 is formed with screw holes for inserting and screwing the studs 55 to the ring plate 6 through a pair of nuts 54. The rotary motion of the nut 54 is converted into the linear motion of the stud 55 by the threaded rotation between the nut 54 and the stud 55, so that the position of the stud 55 relative to the ring plate 6 is adjusted to tighten or loosen the tension spring 52 to adjust the pretension force on the valve cover 4, and the valve cover 4 is ensured to be covered on the lower end of the feeding pipe 8 in a sealing manner. The spring assemblies 5 are preferably 3 groups and are circumferentially distributed uniformly outside the feed tube 8.
The three groups of spring assemblies 5 can reliably lock the powder and granular material with a weight less than a certain weight (or a certain material sealing height) in the feeding pipe 8, and at the moment, the valve cover 4 and the lower end pipe orifice of the feeding pipe 8 are closed, so that the gas medium in the feeding pipe 8 cannot leak; when the particulate material in the feed tube 8 accumulates to a level exceeding a certain weight (or a certain seal height), the valve cap 4 and the lower end nozzle of the feed tube 8 begin to open, referred to as the initial valve opening value. Along with the gradual increase of the feeding quantity (feeding speed) of the particle materials in the feeding pipe 8, the distance (namely the valve opening) between the valve cover 4 and the lower end pipe opening of the feeding pipe 8 is increased, and the corresponding discharging speed of the particle materials is accelerated. The three groups of spring assemblies 5 are automatically controlled by the elasticity of the tension spring 52, the opening degree and the discharge amount of the valve can be tracked in real time, and the feeding pipe 8 can always maintain a certain weight (or a certain material sealing height H) of powder and granular materials in the discharging process, so that the gas medium on the upper part of the feeding pipe 8 cannot be leaked outwards even in the discharging process. The automatic powder discharging valve 110 is automatically operated in the whole discharging process, has no power drive and no energy consumption, and has good air locking sealing performance.
Because the elongation of the tension spring 52 is in direct proportion to the tension, the valve opening of the valve cover 4 is also in linear relation to the discharge amount of the powder material, the valve opening is in direct proportion to the weight (or the material seal height) of the powder material in the feeding pipe 8, and the weight (or the material seal height H) of the material is further in direct proportion to the pressure difference caused by the material seal height, the flow of the powder material in the automatic powder discharging valve 110 can be calculated by measuring the curve of the change of the pressure difference at the upper end and the lower end of the material seal height along with the time.
Referring to fig. 4 and 5, the valve cap 4 is in a conical or spherical cap shape with a high middle part and a low periphery, and a sealing layer 41 is disposed on the surface of the valve cap 4, so that the valve cap 4 is sealingly attached to the lower edge of the feeding pipe 8 through the sealing layer 41. Preferably, the sealing layer 41 is made of wear-resistant rubber, so that the valve cover 4 can be effectively sealed against the lower end of the feeding pipe 8, and the service life of the sealing layer 41 is long.
Referring to fig. 4, the vertex angle of the valve cover 4 with the conical structure is alpha, the value of alpha ranges from 25 degrees to 75 degrees, and the ratio of the diameter D1 of the bottom surface of the conical valve cover 4 to the diameter D0 of the feeding pipe 8 is D1/D0 which is 1.25-1.40.
Referring to fig. 5, the ratio of the diameter D1 of the bottom surface of the valve cover 4 with the spherical cap structure to the diameter D0 of the feeding pipe 8 is D1/D0-1.25-1.40, and the ratio of the diameter 2R of the valve cover 4 with the spherical cap structure to the diameter D1 is 2R/D1-1.45-1.80.
Referring to fig. 6, a limiting rod 16 is arranged in the valve cylinder 3, the limiting rod 16 is in a cross-shaped structure and is coaxially installed right below the valve cover 4, i.e. the plane of the limiting rod 16 is perpendicular to the central axis of the valve core of the discharge valve.
The vertical distance between the bottom surface of the valve cover 4 and the plane where the limiting rod 16 is located is H1, and D0 is not less than H1 and not more than 1.25X D1, wherein D0 is the diameter of the feeding pipe 8, and D1 is the diameter of the bottom surface of the valve cover 4.
Referring to fig. 1 and 7, an on-line monitoring and obstacle clearing control system for an automatic powder discharge valve is connected to an automatic powder discharge valve 110, the automatic powder discharge valve 110 is connected to a pressure tapping pipe, and the on-line monitoring and obstacle clearing control system includes a stop valve 102, a pressure gauge 104, a flow meter 105, a normally closed needle valve 106, a central controller 107, a pressure transmitter 108 and a check valve 109; the flowmeter 105 and the check valve 109 are connected in series to form a monitoring control module, the flowmeter 105 is externally connected with a low-pressure air source through the stop valve 102, and the check valve 109 is connected with the pressure tapping pipe; the central controller 107 is connected with the pressure transmitter 108 to form a remote transmission control module, and the pressure transmitter 108 is connected to the pressure tapping pipe through the normally open needle valve 103; the normally closed needle valve 106 is externally connected with a high-pressure air source to form an obstacle clearing control module, and the normally closed needle valve 106 is connected to the pressure tapping pipe; the stop valve 102 is connected with a pressure gauge 104 through a normally open needle valve 103, the pressure transmitter 108 is connected with the pressure gauge 104 through the normally open needle valve 103, and the normally closed needle valve 106 is connected with the pressure gauge 104. The monitoring control module, the remote transmission control module and the obstacle clearing control module are all connected and arranged by adopting a steel pipe 101, so that the safe flow of gas is ensured.
The automatic powder discharging valve 110 is connected with at least one pressure taking pipe, and each pressure taking pipe is provided with a monitoring control module, a remote transmission control module and a barrier clearing control module.
The pressure tapping pipes comprise a first pressure tapping pipe 15, a second pressure tapping pipe 14, a third pressure tapping pipe 13 and a fourth pressure tapping pipe 14; the first pressure sampling pipe 15 is connected to the bottom of the feeding pipe 8 and penetrates upwards to overhaul the large flange and the flange cover 7, and the second pressure sampling pipe 14 is connected to the top of the feeding pipe 8 and is positioned above the valve cylinder body 3; the upper end of the feeding pipe 8 is coaxially connected with a dipleg 10 through a feeding pipe flange 9, a dipleg flange 11 is installed at the top of the dipleg 10, a third pressure tapping pipe 13 is connected to the middle of the dipleg 10, and a fourth pressure tapping pipe 14 is connected to the upper part of the dipleg 10.
The first pressure obtaining pipe 15, the second pressure obtaining pipe 14, the third pressure obtaining pipe 13 and the fourth pressure obtaining pipe 14 are all obliquely arranged, the axial included angle between the first pressure obtaining pipe 15, the second pressure obtaining pipe 14, the third pressure obtaining pipe 13 and the fourth pressure obtaining pipe 14 and the feed pipe 8 is beta, and the value range of beta is 20-90 degrees.
The height difference of the installation positions of the first pressure sampling pipe 15 and the second pressure sampling pipe 14 is H2, and the value range of H2 is 500-2000 mm.
The measurement principle of the powder material flow rate by the monitoring control module is as follows:
the pressure difference Δ P between the measuring point a and the measuring point B is a function of the time T and the material seal height H, i.e., Δ P ═ F (T, H), the Δ P curve can be obtained by the control device 107 in the control room of the production plant, and the density ρ of the powder material is a function of the time T and the pressure difference Δ P, i.e., ρ ═ F (T, Δ P), i.e., ρ ═ F (T, H, Δ P), the volume V between the two measuring points A, B is known, so the mass W of the powder passing through the discharge valve in a period of time T can be calculated as:
one of the most important criteria for determining whether various dust collectors can work normally is the discharge condition, for example, when a bag-type dust collector works normally, the discharge is also continuous and stable in general, and once the bag-type dust collector fails: for example, the damage of a filter bag, the failure of a back-blowing ash removal system, the air leakage/air leakage of a discharge port and the failure of a discharge valve, the result can be directly reflected that the discharge quantity of powder and granular materials is changed obviously, so that the real-time online analysis of the flow condition of the powder and granular materials has important significance for ensuring the long-period stable operation and production. Therefore, the flow condition of the powder and granular materials is analyzed by adopting a monitoring control module and a remote transmission control module, the third pressure taking pipe 13 is marked as a measuring point C, the fourth pressure taking pipe 12 is marked as a measuring point D, and four measuring points are counted: measuring point A, measuring point B, measuring point C and measuring point D.
The monitoring control module measures the pressure of the four measuring points through the pressure gauge 104, and in order to ensure that the steel pipe 101 and the measuring points are not blocked by impurities such as dust and the like to cause measurement errors, the monitoring control module continuously introduces a certain flow of low-pressure compressed air (or nitrogen) and measures the low-pressure compressed air through the flow meter 105 in the measurement process, so that the dust in the automatic powder discharge valve 110 is ensured not to flow into the monitoring control module. The part of low-pressure compressed air (or nitrogen) enters the feeding pipe 8 and the dipleg 10 to form a strand of 'loose wind', the 'loose wind' can play a role of 'bridging' for destroying dust of the feeding pipe 8 and the dipleg 10, and is very helpful for the flow of powder and granular materials in the pipeline, so that the occurrence frequency of pipeline blockage is greatly reduced. However, when the dust flowability is poor, the possibility of pipeline blockage still exists, so that faults need to be found and processed in time to ensure the production stability. The remote transmission control module is used for sending the pressure transmitting signals of the four measuring points to the central controller 107 for comparison and analysis.
From theoretical analysis it can be known that: when the discharge valve works normally, the pressure distribution rule of the measuring points A, B, C and D on the feeding pipe 8 and the material leg 10 is as follows: PA > PB > PC > PD. When the powder material weight (or the material seal height H) is less than or equal to the initial valve opening value, the powder automatic discharge valve 110 is in a closed state at this time, and obviously satisfies the pressure distribution rule: PA > PB > PC > PD. When the weight of the powder material (or the material seal height H) is larger than the initial valve opening value, the automatic powder discharge valve 110 is in an open state, the setting of the spring assembly 5 enables a section of relatively stable material seal height H to be maintained in the automatic powder discharge valve 110 all the time, the opening degree of the valve cover 4 is correspondingly increased along with the increase of the powder discharging amount, and the four measuring points meet the pressure distribution rule, namely PA is larger than PB and larger than PC is larger than PD. When powder automatic discharge valve 110 broke down, for example, survey point C on dipleg 10 broke down because of dust "bridging" and leads to blockking up not unloading, PA will appear and PB is PC > PD condition, and the direct reflection of accuse ware 107 in the accessible, consequently removed the dust remover and opened the initial stage, when not having powder body material in inlet pipe 8 and dipleg 10 promptly, PA is PB is PC, as long as not following the pressure distribution law under any other operating mode: PA is more than PB and more than PC is more than PD, the abnormal working of the automatic powder discharging valve 110 can be judged in real time, and the position of a measuring point with a problem can be judged in real time.
Taking the dust bridging fault of the measuring point C as an example, the working process of the obstacle clearing control module is as follows: and (3) switching the normally open needle valve 103 and the stop valve 102 in the monitoring control module and the remote transmission control module corresponding to the measuring point C from a normally open state to a closed state, then opening the normally closed needle valve 106 in the obstacle clearing control module corresponding to the measuring point C, manually controlling the normally closed needle valve 106 for total air intake of high-pressure compressed air (or nitrogen) in the obstacle clearing hole module, delaying for several seconds, repeatedly opening, and then exiting the obstacle clearing control module. Restoring the initial values of the monitoring control module and the remote transmission control module, and if the four measuring points on the feeding pipe 8 and the dipleg 10 meet the pressure distribution rule, namely PA is greater than PB and greater than PC is greater than PD, indicating that the measuring point C is restored to normal and the fault is eliminated; if the pressure distribution rule is not met, the obstacle clearing operation is repeated until the pressure distribution rule is met.
Example 1:
the polyurethane granule conveying project built and put into production by a certain chemical company in Shanghai comprises seven granule conveying lines for conveying the finished product to be packaged, wherein the maximum conveying capacity of each granule conveying line per hour is 22 tons, and positive pressure is adoptedDilute phase pneumatic conveying mode, conveying stock bin volume is 4.6m3The original electric rotary discharge valve that sets up of transport feed bin, its inlet pipe diameter D0 be 200mm, be equipped with motor power 0.75 kW. After the operation, the conveying capacity of the device only reaches about 78% of the design value, the product yield is seriously influenced, and the reason is considered as follows: electronic gyration discharge valve leakproofness is relatively poor, and the void ratio between the polyurethane granule is far more than the void ratio of ordinary dust, and the malleation pressure that adopts conveying gas is than higher in addition, causes conveying gas to scurry into through electronic gyration discharge valve and carries the feed bin formation similar fluidized bed, leads to the polyurethane granule to be difficult to discharge through electronic gyration discharge valve smoothly. The manufacturer selects an imported electric rotary discharge valve with better sealing performance, the effect is not improved, and meanwhile, because the polyurethane granules are larger and have strong toughness, the blades of the electric rotary discharge valve are clamped frequently, so that the whole conveying line is stopped, and the economic loss is not small for the manufacturer.
Therefore, the factory adopts the powder automatic discharge valve and the online monitoring and obstacle clearing control system thereof, and the powder automatic discharge valve 110 in the embodiment comprises a discharge pipe 1, a valve cone 2, a valve cylinder body 3, a valve cover 4, a spring assembly 5, an annular plate 6, a large overhaul flange and flange cover 7, a feed pipe 8 and a discharge pipe flange 17; the discharge pipe flange 17, the discharge pipe 1, the valve cone 2, the valve cylinder body 3 and the large overhauling flange and the flange cover 7 are coaxially connected from bottom to top to form a discharge valve outer shell; the ring plate 6 is of a circular structure and is annularly arranged on the outer wall of the lower part of the feeding pipe 8, the spring assemblies 5 are connected between the ring plate 6 and the outer wall of the bottom of the valve cover 4, and the three groups of spring assemblies 5 are uniformly distributed on the outer side of the feeding pipe 8 in the circumferential direction, so that the valve cover 4 covers the lower end of the feeding pipe 8 in a sealing manner to form a valve core of the discharge valve; the valve core of the discharge valve is coaxially arranged in the outer shell of the discharge valve, and the upper end of the feeding pipe 8 upwards penetrates through the large flange and the flange cover 7 for maintenance.
Each set of spring assemblies 5 comprises a lower shackle 51, a tension spring 52, an upper shackle 53, a nut 54 and a stud 55; for adjusting the pretension force on the valve cover 4, ensuring that the valve cover 4 is sealingly covered on the lower end of the feed pipe 8 by a sealing layer 41 made of wear-resistant rubber.
The valve cover 4 is in a conical shape with a high middle part and a low periphery, the vertex angle alpha of the valve cover 4 is 25 degrees, and the ratio of the diameter D1 of the bottom surface of the conical valve cover 4 to the diameter D0 of the feeding pipe 8 is D1/D0 which is 250/200 which is 1.25.
A cross limiting rod 16 is arranged right below the valve cover 4 in the valve cylinder body 3, the vertical distance H1 between the bottom surface of the valve cover 4 and the plane where the limiting rod 16 is located is 230mm, and D0 is equal to or larger than H1 and equal to or smaller than 1.25X D1.
This embodiment sets up four pressure pipes: the pressure measuring device comprises a first pressure measuring pipe 15, a second pressure measuring pipe 14, a third pressure measuring pipe 13 and a fourth pressure measuring pipe 14; the first pressure tapping pipe 15 is connected to the bottom of the feeding pipe 8 and penetrates upwards to overhaul the large flange and the flange cover 7, the second pressure tapping pipe 14 is connected to the top of the feeding pipe 8 and located above the valve cylinder body 3, and the height difference H2 between the second pressure tapping pipe 14 and the first pressure tapping pipe 15 in the installation position is 500 mm; the upper end of the feeding pipe 8 is coaxially connected with a dipleg 10 through a feeding pipe flange 9, a dipleg flange 11 is installed at the top of the dipleg 10, a third pressure tapping pipe 13 is connected to the middle of the dipleg 10, and a fourth pressure tapping pipe 14 is connected to the upper part of the dipleg 10. The included angles beta between the first pressure sampling pipe 15, the second pressure sampling pipe 14, the third pressure sampling pipe 13 and the fourth pressure sampling pipe 14 and the axial direction of the feeding pipe 8 are all 20 degrees.
The on-line monitoring and obstacle clearing control system of the automatic powder discharge valve comprises a stop valve 102, a flow meter 105, a normally closed needle valve 106, a central controller 107, a pressure transmitter 108 and a check valve 109; the flow meters 105 and the check valves 109 are connected in series to form a monitoring control module, the flow meters 105 of the four groups of monitoring control modules are all connected to the stop valve 102, one end of the stop valve 102 is externally connected with a low-pressure air source, and the check valves 109 of the four groups of monitoring control modules are respectively connected to the first pressure sampling pipe 15, the second pressure sampling pipe 14, the third pressure sampling pipe 13 and the fourth pressure sampling pipe 14 in a one-to-one correspondence manner; the central controller 107 is connected with pressure transmitters 108 to form a remote transmission control module, and the pressure transmitters 108 of the four groups of remote transmission control modules are respectively connected to the first pressure taking pipe 15, the second pressure taking pipe 14, the third pressure taking pipe 13 and the fourth pressure taking pipe 14 in a one-to-one correspondence manner through normally open needle valves 103; the normally closed needle valves 106 are externally connected with a high-pressure air source to form an obstacle clearing control module, and the normally closed needle valves 106 of the four obstacle clearing control modules are connected to the first pressure taking pipe 15, the second pressure taking pipe 14, the third pressure taking pipe 13 and the fourth pressure taking pipe 14 in a one-to-one correspondence mode. The stop valve 102 is connected with a pressure gauge 104 through a normally open needle valve 103, the pressure transmitter 108 is connected with the pressure gauge 104 through the normally open needle valve 103, and the normally closed needle valve 106 is connected with the pressure gauge 104. The pipeline connection of the on-line monitoring and obstacle clearing control system can adopt a steel pipe 101, so that the safe circulation of gas is ensured.
The low-pressure compressed air (or nitrogen) is simultaneously metered by four sets of flow meters 105 of the monitoring control modules, and the four lines have the same gas flow; the four check valves 109 are directly connected with the four pressure sampling pipes (i.e. the measuring points, which are marked as measuring point A, measuring point B, measuring point C and measuring point D) respectively, so that the gas in the automatic powder discharge valve 110 is prevented from being mixed with dust into the pipeline.
The central controller 107 can adopt a distributed control system DCS, four remote transmission control modules are respectively and correspondingly connected with four pressure taking pipes (namely, measuring points, namely, measuring point a, measuring point B, measuring point C and measuring point D) on the automatic powder discharging valve 110, pressure data (marked as PA, PB, PC and PD) of the four measuring points are remotely transmitted to the central controller 107 through the pressure transmitter 108, and the four data of PA, PB, PC and PD can be judged and compared in real time through the central controller 107 of the DCS.
The four groups of barrier clearing control modules are respectively and correspondingly connected with four pressure taking pipes (namely measuring points) on the automatic powder discharging valve 110, and high-pressure compressed air (or nitrogen) can simultaneously enter the four pressure taking pipes through four lines respectively; the four check valves 109 are directly connected with the four pressure sampling pipes respectively, so that gas in the automatic powder discharge valve 110 is prevented from carrying dust into pipelines.
After the invention is adopted, the production of the manufacturer is obviously improved: the maximum conveying capacity of each production line exceeds 23 percent of the original design value, namely the maximum conveying capacity exceeds 27 tons/hour; the blow-by phenomenon of the conveying bin completely disappears, the powder automatic discharge valve 110 discharges stably and smoothly, the automatic powder discharge valve 110 has the metering function, the monitoring function and the barrier clearing function, the automation degree and the stability of production are greatly improved, and the discharge valve never breaks down after more than two years of actual operation; in addition, the powder automatic discharge valve 110 does not need power drive and energy consumption, so that the comprehensive economic benefit is very obvious and the user comment is obtained.
Example 2:
the tail gas of the pulverized coal fluidized drying project of a certain large coal chemical industry enterprise in Shanxi adopts a low-pressure nitrogen pulse bag type dust collector to collect pulverized coal, 135 tons of the pulverized coal is recovered by the dust collector per hour, the dust collector works under the negative pressure working condition, an explosion-proof electric double-flap valve is adopted in consideration of higher sealing performance requirement of equipment, and the blanking caliber of the electric double-flap valve is DN400 and is provided with 1.7kW of motor power. After the production, a serious safety problem is found, namely the safety production line with the oxygen concentration in the dust remover exceeding 8% of the process requirement is on line, and the problem still appears on the sealing performance of the electric double-flap valve through repeated research and analysis, and because the caliber of the flap valve is large, the upper valve plate and the lower valve plate are not tightly attached to the sealing surface; meanwhile, the material sealing height of the pulverized coal material on the two valve plates of the flap valve is not enough during operation, so that the internal and external pressure difference cannot be counteracted to cause 'blow-by' under the working condition of large negative pressure in the dust remover. In addition, because the buggy granule is thinner and material fluidity is relatively poor, the dust remover feed opening buggy leads to the flap valve to discharge the condition of material occasionally because of "bridging", seriously influences the stability of production, and the earlier stage is that the operation workman need shake repeatedly the dust remover outer wall, and the later stage outer wall sets up vibration/rapping device, but the effect is still not good, therefore the row's of dust remover material problem becomes the production hidden danger.
Therefore, the factory adopts the powder automatic discharge valve and the online monitoring and obstacle clearing control system thereof, and the powder automatic discharge valve 110 in the embodiment comprises a discharge pipe 1, a valve cone 2, a valve cylinder body 3, a valve cover 4, a spring assembly 5, an annular plate 6, a large overhaul flange and flange cover 7, a feed pipe 8 and a discharge pipe flange 17; the discharge pipe flange 17, the discharge pipe 1, the valve cone 2, the valve cylinder body 3 and the large overhauling flange and the flange cover 7 are coaxially connected from bottom to top to form a discharge valve outer shell; the ring plate 6 is of a circular structure and is annularly arranged on the outer wall of the lower part of the feeding pipe 8, the spring assemblies 5 are connected between the ring plate 6 and the outer wall of the bottom of the valve cover 4, and the three groups of spring assemblies 5 are uniformly distributed on the outer side of the feeding pipe 8 in the circumferential direction, so that the valve cover 4 covers the lower end of the feeding pipe 8 in a sealing manner to form a valve core of the discharge valve; the valve core of the discharge valve is coaxially arranged in the outer shell of the discharge valve, and the upper end of the feeding pipe 8 upwards penetrates through the large flange and the flange cover 7 for maintenance.
Each set of spring assemblies 5 comprises a lower shackle 51, a tension spring 52, an upper shackle 53, a nut 54 and a stud 55; for adjusting the pretension force on the valve cover 4, ensuring that the valve cover 4 is sealingly covered on the lower end of the feed pipe 8 by a sealing layer 41 made of wear-resistant rubber.
The valve cover 4 is in a spherical crown shape with a high middle part and a low periphery, the ratio of the diameter D1 of the bottom surface of the conical valve cover 4 to the diameter D0 of the feeding pipe 8 is D1/D0-560/400-1.40, and the ratio of the diameter 2R of the valve cover 4 with the spherical crown structure to the diameter D1 is 2R/D1-1008/560-1.80.
A cross limiting rod 16 is arranged right below the valve cover 4 in the valve cylinder body 3, the vertical distance H1 between the bottom surface of the valve cover 4 and the plane where the limiting rod 16 is located is 480mm, and D0 is equal to or larger than H1 and equal to or smaller than 1.25X D1.
This embodiment sets up four pressure pipes: the pressure measuring device comprises a first pressure measuring pipe 15, a second pressure measuring pipe 14, a third pressure measuring pipe 13 and a fourth pressure measuring pipe 14; the first pressure tapping pipe 15 is connected to the bottom of the feeding pipe 8 and penetrates upwards to overhaul the large flange and the flange cover 7, the second pressure tapping pipe 14 is connected to the top of the feeding pipe 8 and located above the valve cylinder body 3, and the height difference H2 between the second pressure tapping pipe 14 and the first pressure tapping pipe 15 in the installation position is 2000 mm; the upper end of the feeding pipe 8 is coaxially connected with a dipleg 10 through a feeding pipe flange 9, a dipleg flange 11 is installed at the top of the dipleg 10, a third pressure tapping pipe 13 is connected to the middle of the dipleg 10, and a fourth pressure tapping pipe 14 is connected to the upper part of the dipleg 10. The included angles beta between the first pressure sampling pipe 15, the second pressure sampling pipe 14, the third pressure sampling pipe 13 and the fourth pressure sampling pipe 14 and the axial direction of the feeding pipe 8 are all 90 degrees.
The on-line monitoring and obstacle clearing control system of the automatic powder discharge valve comprises a stop valve 102, a flow meter 105, a normally closed needle valve 106, a central controller 107, a pressure transmitter 108 and a check valve 109; the flow meters 105 and the check valves 109 are connected in series to form a monitoring control module, the flow meters 105 of the four groups of monitoring control modules are all connected to the stop valve 102, one end of the stop valve 102 is externally connected with a low-pressure air source, and the check valves 109 of the four groups of monitoring control modules are respectively connected to the first pressure sampling pipe 15, the second pressure sampling pipe 14, the third pressure sampling pipe 13 and the fourth pressure sampling pipe 14 in a one-to-one correspondence manner; the central controller 107 is connected with pressure transmitters 108 to form a remote transmission control module, and the pressure transmitters 108 of the four groups of remote transmission control modules are respectively connected to the first pressure taking pipe 15, the second pressure taking pipe 14, the third pressure taking pipe 13 and the fourth pressure taking pipe 14 in a one-to-one correspondence manner through normally open needle valves 103; the normally closed needle valves 106 are externally connected with a high-pressure air source to form an obstacle clearing control module, and the normally closed needle valves 106 of the four obstacle clearing control modules are connected to the first pressure taking pipe 15, the second pressure taking pipe 14, the third pressure taking pipe 13 and the fourth pressure taking pipe 14 in a one-to-one correspondence mode. The stop valve 102 is connected with a pressure gauge 104 through a normally open needle valve 103, the pressure transmitter 108 is connected with the pressure gauge 104 through the normally open needle valve 103, and the normally closed needle valve 106 is connected with the pressure gauge 104. The pipeline connection of the on-line monitoring and obstacle clearing control system can adopt a steel pipe 101, so that the safe circulation of gas is ensured.
The low-pressure compressed air (or nitrogen) is simultaneously metered by four sets of flow meters 105 of the monitoring control modules, and the four lines have the same gas flow; the four check valves 109 are directly connected with the four pressure sampling pipes (i.e. the measuring points, which are marked as measuring point A, measuring point B, measuring point C and measuring point D) respectively, so that the gas in the automatic powder discharge valve 110 is prevented from being mixed with dust into the pipeline.
The central controller 107 can adopt a distributed control system DCS, four remote transmission control modules are respectively and correspondingly connected with four pressure taking pipes (namely, measuring points, namely, measuring point a, measuring point B, measuring point C and measuring point D) on the automatic powder discharging valve 110, pressure data (marked as PA, PB, PC and PD) of the four measuring points are remotely transmitted to the central controller 107 through the pressure transmitter 108, and the four data of PA, PB, PC and PD can be judged and compared in real time through the central controller 107 of the DCS.
The four groups of barrier clearing control modules are respectively and correspondingly connected with four pressure taking pipes (namely measuring points) on the automatic powder discharging valve 110, and high-pressure compressed air (or nitrogen) can simultaneously enter the four pressure taking pipes through four lines respectively; the four check valves 109 are directly connected with the four pressure sampling pipes respectively, so that gas in the automatic powder discharge valve 110 is prevented from carrying dust into pipelines.
Compared with an electric double-flap valve, the area of the sealing surface at the joint of the automatic powder discharge valve 110 is far smaller than that of the flap valve, the sealing surface is stable and is not easy to deform and jam by dust, and the upper part of the automatic powder discharge valve 110 has enough long coal powder material sealing height, so that external air is difficult to be sucked into the bag-type dust remover, the oxygen concentration inside the dust remover always meets the safety production process requirement of less than 8%, and the potential safety hazard is thoroughly eliminated.
Because the discharge valve has the metering function, the monitoring function and the barrier clearing function, and simultaneously, because the nitrogen gas metered by the flow meter 105 is introduced into the feeding pipe 8 of the automatic powder discharge valve 110 and four measuring points on the dipleg 10 at any time, the continuously and stably introduced nitrogen gas can perfectly break the bridging phenomenon of the coal dust at the discharge opening of the dust remover; even if the bridging phenomenon occurs, the problem can be found in real time through the monitoring control module and can be solved in time through the obstacle clearing control module, the automation degree and the stability of production are greatly improved, and the discharge valve can completely ensure long-term stable operation through years of practical operation examination; meanwhile, the automatic powder discharging valve 110 does not need power drive and energy consumption, so that direct economic benefit and social benefit (safety problem) are obvious, and the user comment is obtained.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a powder automatic discharge valve which characterized by: comprises a discharge pipe (1), a valve cone (2), a valve cylinder body (3), a valve cover (4), a spring assembly (5), a ring plate (6), a large overhaul flange and a flange cover (7), a feed pipe (8) and a discharge pipe flange (17); the discharge pipe flange (17), the discharge pipe (1), the valve cone (2), the valve cylinder (3) and the large overhaul flange and the flange cover (7) are coaxially connected from bottom to top to form a discharge valve outer shell; the ring plate (6) is of a circular ring structure and is annularly arranged on the outer wall of the lower part of the feeding pipe (8), the spring assemblies (5) are connected between the ring plate (6) and the outer wall of the bottom of the valve cover (4), and a plurality of groups of spring assemblies (5) are circumferentially arranged on the outer side of the feeding pipe (8), so that the valve cover (4) is hermetically covered on the lower end of the feeding pipe (8) to form a valve core of the discharge valve; the valve core of the discharge valve is coaxially arranged in the outer shell of the discharge valve, and the upper end of the feeding pipe (8) upwards penetrates through a large overhauling flange and a flange cover (7);
each group of spring assemblies (5) comprises a lower hook ring (51), a tension spring (52), an upper hook ring (53), a nut (54) and a stud (55); the lower end of a tension spring (52) is connected to the outer wall of the bottom of the valve cover (4) through a lower shackle (51), and the upper end of the tension spring (52) is connected with the lower end of a stud (55) through an upper shackle (53); screw holes are formed on the ring plate (6) so that the studs (55) are screwed on the ring plate (6) through a pair of nuts (54).
2. The automatic powder discharge valve according to claim 1, wherein: valve gap (4) be middle high, conical or spherical crown shape structure that hangs down all around, and valve gap (4) surface is equipped with sealing layer (41), makes valve gap (4) seal laminating in the lower extreme edge of inlet pipe (8) through sealing layer (41).
3. The automatic powder discharge valve according to claim 2, wherein: the vertex angle of the valve cover (4) with the conical structure is alpha, the value range of the alpha is 25-75 degrees, and the ratio of the diameter D1 of the bottom surface of the conical valve cover (4) to the diameter D0 of the feeding pipe (8) is D1/D0 which is 1.25-1.40.
4. The automatic powder discharge valve according to claim 2, wherein: the ratio of the diameter D1 of the bottom surface of the valve cover (4) with the spherical cap structure to the diameter D0 of the feeding pipe (8) is D1/D0-1.25-1.40, and the ratio of the diameter 2R of the valve cover (4) with the spherical cap structure to the diameter D1 is 2R/D1-1.45-1.80.
5. The automatic powder discharge valve according to claim 1, wherein: a limiting rod (16) is arranged in the valve cylinder body (3), the limiting rod (16) is of a cross structure and is coaxially arranged under the valve cover (4), namely, the plane of the limiting rod (16) is vertical to the central axis of the valve core of the discharge valve;
the vertical distance between the bottom surface of the valve cover (4) and the plane where the limiting rod (16) is located is H1, and D0 is equal to or larger than H1 and equal to or smaller than 1.25X D1, wherein D0 is the diameter of the feeding pipe (8), and D1 is the diameter of the bottom surface of the valve cover (4).
6. The on-line monitoring and obstacle clearing control system of the automatic powder discharge valve of claim 1, which is characterized in that: the online monitoring and obstacle clearing control system is connected to an automatic powder discharge valve (110), the automatic powder discharge valve (110) is connected with a pressure taking pipe, and the online monitoring and obstacle clearing control system comprises a stop valve (102), a pressure gauge (104), a flow meter (105), a normally closed needle valve (106), a central controller (107), a pressure transmitter (108) and a check valve (109); the flow meter (105) and the check valve (109) are connected in series to form a monitoring control module, the flow meter (105) is externally connected with a low-pressure air source through the stop valve (102), and the check valve (109) is connected with the pressure sampling pipe; the central controller (107) is connected with the pressure transmitter (108) to form a remote transmission control module, and the pressure transmitter (108) is connected to the pressure sampling pipe through a normally open needle valve (103); the normally closed needle valve (106) is externally connected with a high-pressure air source to form an obstacle clearing control module, and the normally closed needle valve (106) is connected to the pressure tapping pipe; the stop valve (102) is connected with a pressure gauge (104) through a normally open needle valve (103), the pressure transmitter (108) is connected with the pressure gauge (104) through the normally open needle valve (103), and the normally closed needle valve (106) is connected with the pressure gauge (104).
7. The on-line monitoring and obstacle clearance control system of claim 6, wherein: the automatic powder discharging valve (110) is connected with at least one pressure taking pipe, and each pressure taking pipe is provided with a monitoring control module, a remote transmission control module and a barrier clearing control module.
8. The on-line monitoring and obstacle clearance control system of claim 7, wherein: the pressure tapping pipe comprises a first pressure tapping pipe (15), a second pressure tapping pipe (14), a third pressure tapping pipe (13) and a fourth pressure tapping pipe (14); the first pressure tapping pipe (15) is connected to the bottom of the feeding pipe (8) and penetrates through the large flange and the flange cover (7) upwards, and the second pressure tapping pipe (14) is connected to the top of the feeding pipe (8) and located above the valve cylinder body (3); the upper end of the feeding pipe (8) is coaxially connected with a dipleg (10) through a feeding pipe flange (9), the dipleg flange (11) is installed at the top of the dipleg (10), a third pressure tapping pipe (13) is connected to the middle of the dipleg (10), and a fourth pressure tapping pipe (14) is connected to the upper part of the dipleg (10).
9. The on-line monitoring and obstacle clearance control system of claim 8, wherein: first pressure pipe (15), second pressure pipe (14), third pressure pipe (13) and fourth pressure pipe (14) are got and are all set up in the slope, the first pressure pipe (15), second pressure pipe (14), third pressure pipe (13) and fourth pressure pipe (14) are got and are pressed the axial contained angle between pipe (8) and the inlet pipe is beta, the value range of beta is 20 ° -90.
10. An on-line monitoring and obstacle clearance control system according to claim 8 or 9, characterized in that: the height difference of the installation positions of the first pressure sampling pipe (15) and the second pressure sampling pipe (14) is H2, and the value range of H2 is 500-2000 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111199403.XA CN113788321A (en) | 2021-10-14 | 2021-10-14 | Automatic powder discharge valve and online monitoring and obstacle clearing control system thereof |
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| CN202111199403.XA CN113788321A (en) | 2021-10-14 | 2021-10-14 | Automatic powder discharge valve and online monitoring and obstacle clearing control system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733302A (en) * | 2022-06-14 | 2022-07-12 | 西安医学院第二附属医院 | Neonate's thermostated container air filter |
| CN114751200A (en) * | 2022-04-08 | 2022-07-15 | 无锡红旗除尘设备有限公司 | Powder pneumatic conveying control method |
-
2021
- 2021-10-14 CN CN202111199403.XA patent/CN113788321A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751200A (en) * | 2022-04-08 | 2022-07-15 | 无锡红旗除尘设备有限公司 | Powder pneumatic conveying control method |
| CN114733302A (en) * | 2022-06-14 | 2022-07-12 | 西安医学院第二附属医院 | Neonate's thermostated container air filter |
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