CN108792513B - Putty monitoring devices, head funnel and transmission control system - Google Patents
Putty monitoring devices, head funnel and transmission control system Download PDFInfo
- Publication number
- CN108792513B CN108792513B CN201710310012.8A CN201710310012A CN108792513B CN 108792513 B CN108792513 B CN 108792513B CN 201710310012 A CN201710310012 A CN 201710310012A CN 108792513 B CN108792513 B CN 108792513B
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- monitoring device
- magnetic induction
- opening
- cover plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
Landscapes
- Control Of Conveyors (AREA)
Abstract
The invention provides a blockage monitoring device, a head funnel and a transmission control system, wherein the blockage monitoring device comprises a shell with an open side, a magnetic induction proximity switch, a transmission shaft and a detection baffle plate; the magnetic induction proximity switch is arranged on the outer side of the shell; the detection baffle is arranged at the opening of the shell, and one end of the detection baffle is fixed on the transmission shaft so as to enable the detection baffle to rotate and drive the transmission shaft to rotate; and after the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection or the connection of an electric loop is controlled. The blockage monitoring device provided by the invention solves the problem that the existing detection device cannot adapt to the severe production environment of a coal conveying system, and the blockage fault of a belt conveyor cannot be accurately and reliably detected.
Description
Technical Field
The invention relates to the technical field of mechanical design and manufacturing, in particular to a blockage monitoring device, a head funnel and a transmission control system.
Background
The belt conveying system is an important public system of the thermal power plant, the raw coal conveying system of the thermal power plant consists of a plurality of belts and equipment for screening, coal feeding, coal blending and the like, the equipment continuously and synchronously operates, little people or no people are on site, and remote control is only carried out in a control room. If the coal blockage fault occurs in the operation process of the conveying system, the detection and the signal uploading cannot be timely and accurately carried out, a large amount of raw coal is accumulated, and a belt is broken by grinding. When one belt is broken, the motor still runs, raw coal of the upper-level belt is accumulated and the belt is broken, so that the whole conveying system is paralyzed, and the consequence is very serious.
Under the current technical conditions, sensors applied to the blockage detection of a belt conveyor mainly have two forms. The first is a radio frequency admittance principle, when a coal blockage condition occurs, raw coal can contact a detection surface of a sensor, and the sensor detects that the dielectric constant of a medium changes, so that the action of a radio frequency admittance type switch is triggered. However, the sensor cannot distinguish whether the change of the dielectric constant of the detection surface is caused by coal blockage or dirty coal dust or coal slurry, so that signal malfunction is frequently caused, and the whole conveying system is frequently stopped. The second is detection by a mechanical sampling and travel switch method (mechanical travel switch or proximity switch). Because the mechanical travel switch is easy to cause rotation jamming, contact corrosion and electrical grounding faults in a moist dust environment, the sensor has short service life and large maintenance amount.
Therefore, the two modes are difficult to realize accurate and reliable detection of the blockage fault of the belt conveyor due to the fact that the device cannot adapt to the severe production environment of a coal conveying system.
Disclosure of Invention
In view of the above, the present invention provides a blockage monitoring device, a head funnel and a transmission control system, so as to solve the problem that the existing detection device cannot adapt to the harsh production environment of a coal conveying system, and is difficult to accurately and reliably detect the blockage fault of a belt conveyor.
In a first aspect, an embodiment of the present invention provides a blocking monitoring device, including a housing with an open side, a magnetic induction proximity switch, a transmission shaft, and a detection baffle;
the magnetic induction proximity switch is arranged on the outer side of the shell;
the detection baffle is arranged at the opening of the shell, and one end of the detection baffle is fixed on the transmission shaft so as to enable the detection baffle to rotate and drive the transmission shaft to rotate;
and after the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection or the connection of an electric loop is controlled.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the magnetic induction proximity switch includes a magnetic steel moving component and a magnetic induction sensor.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the magnetic steel moving component includes a magnetic steel bracket and magnetic steel, a first end of the magnetic steel bracket is fixedly connected to the transmission shaft, a second end of the magnetic steel bracket fixes the magnetic steel, and the magnetic steel bracket and the magnetic induction sensor maintain a preset angle, so that when the transmission shaft rotates, a distance between the magnetic steel and the magnetic induction sensor changes.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the detection baffle includes a fixed sleeve and a steel plate, the fixed sleeve is fixed to one end of the steel plate, and the fixed sleeve is fixedly connected to the transmission shaft;
the steel plate is bent to form an obtuse angle with a first preset angle, and the opening direction of the obtuse angle points to the outer side of the opening of the shell.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the fourth possible implementation manner further includes a return spring disposed in a housing, the return spring is sleeved on the transmission shaft, one end of the return spring is fixed inside the housing, and the other end of the return spring is connected to the detection baffle.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the apparatus further includes a position maintaining component, where the position maintaining component is fixed inside the opening;
the position holding member includes a position holding magnet that attracts the detection flapper.
With reference to the foregoing embodiment of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein a cover plate is disposed on a side of the housing opposite to the opening, the cover plate includes an upper cover plate and a lower cover plate, the upper cover plate is parallel to the opening, one end of the lower cover plate is connected to the upper cover plate, and the other end of the lower cover plate is connected to a bottom edge of the opening, so that an acute angle of a second preset angle is formed between the lower cover plate and the opening.
In a second aspect, an embodiment of the present invention further provides a head funnel, including a funnel body and the blockage monitoring device according to the first aspect, where the blockage monitoring device is disposed on an outer wall of the funnel body, and an opening is disposed on the outer wall and is matched with an opening of a housing of the blockage monitoring device.
In a third aspect, an embodiment of the present invention further provides a transmission control system, including a belt conveyor, an upper computer, and the head funnel according to the second aspect; and the upper computer receives the alarm signal sent by the magnetic induction sensor and controls the starting and stopping of the belt conveyor.
With reference to the third aspect, an embodiment of the present invention provides a first possible implementation manner of the third aspect, where the apparatus further includes a delay circuit, and the delay circuit is connected to the upper computer.
The embodiment of the invention has the following beneficial effects:
in the embodiment provided by the invention, the material blockage monitoring device comprises a shell with an open side, a magnetic induction proximity switch, a transmission shaft and a detection baffle plate; the shell is hollow, the transmission shaft penetrates through the upper part of the shell and is rotationally connected with the shell, and the magnetic induction proximity switch is arranged on the outer side of the shell; the detection baffle is arranged at the opening of the shell, one end of the detection baffle is fixed on the transmission shaft, so that the detection baffle rotates to drive the transmission shaft to rotate, and the magnetic induction proximity switch controls the disconnection or the connection of an electric loop after detecting that the transmission shaft rotates. According to the blockage monitoring device, a mechanical sampling mode is adopted, when a blockage fault occurs, the material level reaches the height of the detection baffle, the detection baffle rotates under the pushing of a material, and the transmission shaft is driven to rotate; when the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection of the electric loop is controlled, and therefore the effect of detecting whether material is blocked is achieved. Therefore, the blockage monitoring device provided by the invention is not influenced by the severe production environment of the coal conveying system, and the blockage fault of the belt conveyor can be accurately and reliably detected.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a first structure of a blockage monitoring device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a transmission shaft according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a detection baffle according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a magnetic induction proximity switch according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an internal structure of a magnetic induction proximity switch according to an embodiment of the present invention;
FIG. 6 is an electrical connection diagram of a magnetic induction sensor provided in accordance with an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a magnetic steel bracket according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a return spring according to an embodiment of the present invention;
FIG. 9 is a schematic view of a position maintaining bracket according to an embodiment of the present invention;
fig. 10 is a schematic view of a second structure of the blockage monitoring device according to the embodiment of the present invention;
FIG. 11 is a left side view of the housing provided by the present invention;
FIG. 12 is a right side view of the housing provided by the present embodiment of the invention;
FIG. 13 is a schematic structural diagram of a head funnel according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a transmission control system according to an embodiment of the present invention.
Icon:
10-a magnetic induction proximity switch; 20-a drive shaft; 30-a detection baffle; 40-a return spring; 50-a position holding member; 70-flange plate; 101-magnetic steel moving parts; 1011-magnetic steel bracket; 1012-magnetic steel; 1013-a second via; 102-a magnetic induction sensor; 103-a switch housing; 104-power supply line; 201-a first circlip; 202-a second circlip; 203-a third circlip; 204-a first threaded hole; 205-a second threaded hole; 301-fixation of the cannula; 302-steel plate; 501-position holding bracket; 5011-third threaded hole; 5012-notch; 601-upper cover plate; 602-a lower cover plate; 100-a funnel body; 1100-a material inlet; 1200-blanking port; 200-a blocking monitoring device; 1000-head funnel; 2000-upper computer; 3000-belt conveyer.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, due to the fact that the sensor cannot adapt to the severe production environment of a coal conveying system, the existing blockage monitoring sensor is difficult to detect the blockage faults of the belt conveyor accurately and reliably. Based on the above, the blockage monitoring device, the head funnel and the transmission control system provided by the embodiment of the invention can adopt a mechanical sampling mode, when a blockage fault occurs, the material level reaches the height of the detection baffle, and the detection baffle rotates under the pushing of the material and drives the transmission shaft to rotate; when the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection of the electric loop is controlled, and therefore the effect of detecting whether material is blocked is achieved. Therefore, the blockage monitoring device provided by the invention is not influenced by the severe production environment of the coal conveying system, and the blockage fault of the belt conveyor can be accurately and reliably detected.
For the convenience of understanding the embodiment, a detailed description will be first given of a blockage monitoring device disclosed in the embodiment of the present invention.
The first embodiment is as follows:
the blockage monitoring device provided by the invention can be arranged on a head funnel in a belt transmission system, is used for monitoring whether the blockage phenomenon occurs in the head funnel or not, and can also be applied to other container devices in which the blockage easily occurs. In use, the blockage monitoring device can be mounted in a preset position of a head funnel or other container device.
Fig. 1 shows a schematic view of a first structure of a blockage monitoring device provided by an embodiment of the invention. As shown in fig. 1, the blockage monitoring device includes a housing with an open side, a magnetic induction proximity switch 10, a transmission shaft 20, and a detection baffle 30. The housing is hollow, the transmission shaft 20 penetrates through the upper part of the housing and is rotatably connected with the housing, and the magnetic induction proximity switch 10 is arranged on the outer side of the housing. The detection baffle 30 is arranged at the opening of the shell, and one end of the detection baffle 30 is fixed on the transmission shaft 20, so that the detection baffle 30 rotates to drive the transmission shaft 20 to rotate. After the magnetic induction proximity switch 10 detects the rotation of the transmission shaft 20, the electric circuit is controlled to be disconnected or connected.
According to the blockage monitoring device, a mechanical sampling mode is adopted, when a blockage fault occurs, the material level reaches the height of the detection baffle, the detection baffle rotates under the pushing of a material, and the transmission shaft is driven to rotate; when the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection of the electric loop is controlled, and therefore the effect of detecting whether material is blocked is achieved. Therefore, the blockage monitoring device provided by the invention is not influenced by the severe production environment of the coal conveying system, and the blockage fault of the belt conveyor can be accurately and reliably detected.
Specifically, fig. 2 shows a schematic structural diagram of a transmission shaft provided in an embodiment of the present invention. As shown in fig. 2, a first elastic collar 201 and a second elastic collar 202 are disposed on the transmission shaft 20, and the transmission shaft 20 traverses through an upper portion of the housing of the plugging monitoring device and is positioned by the first elastic collar 201 and the second elastic collar 202, so that the transmission shaft 20 is rotatably connected with respect to the housing of the plugging monitoring device.
Specifically, fig. 3 shows a schematic structural diagram of the detection baffle provided in the embodiment of the present invention. As shown in fig. 3, the detection baffle 30 includes a fixing sleeve 301 and a steel plate 302, and the fixing sleeve 301 is fixed to one end of the steel plate 302 and is fixedly connected to the transmission shaft 20. Specifically, a first through hole is formed in the middle of the fixing sleeve 301, a first threaded hole 204 is formed in the center of the transmission shaft 20, and the transmission shaft 20 and the detection baffle 30 are fixedly connected by passing through the first through hole and the first threaded hole 204 through any one of a jackscrew, a screw or a bolt. Thus, the detection baffle 30 is convenient to detach and replace through the threaded hole for fixing. Here, the fixing manner is not limited specifically, and the transmission shaft 20 and the detection baffle 30 may be welded directly together, or the transmission shaft 20 and the detection baffle 30 may be integrally formed.
In addition, as shown in fig. 1 and fig. 2, the steel plate 302 of the detection baffle 30 is bent to form an obtuse angle with a first predetermined angle, and the opening direction of the obtuse angle is directed to the outside of the opening of the housing, wherein the inside of the housing is the inside of the opening, and the outside of the housing is the outside of the opening. Thus, the gravity center of the detection baffle 30 can be improved, and the gravitational potential energy is increased, so that the detection baffle 30 can be more easily reset after the blockage is eliminated.
Further, fig. 4 shows a schematic structural diagram of a magnetic induction proximity switch provided in an embodiment of the present invention, and fig. 5 shows a schematic structural diagram of an internal structure of the magnetic induction proximity switch provided in the embodiment of the present invention, as shown in fig. 4 and fig. 5, the magnetic induction proximity switch 10 includes a magnetic steel moving component 101 and a magnetic induction sensor 102, and an electrical signal generated by the magnetic induction proximity switch 10 is derived through a power line 104. The magnetic steel moving part 101 is fixedly connected to a first end of the transmission shaft 20, and the first end penetrates through a casing of the blockage monitoring device and is located outside the casing of the blockage monitoring device. When the transmission shaft 20 rotates, the magnetic steel moving part 101 is driven to rotate.
Further, in order to solve the problem that the existing blockage monitoring technology has strong requirements on power supply properties (alternating current, direct current or voltage levels) and cannot adapt to control systems of different users, the magnetic induction sensor 102 is preferably a passive control device. Fig. 6 shows an electrical connection diagram of a magnetic induction sensor provided by an embodiment of the present invention. As shown in fig. 6, the magnetic induction sensor 102 is a non-contact sensing element, and has two sets of normally open and normally closed contacts, which are connected to the power line 104, and has the characteristics of water resistance, dust resistance, and acid and alkali resistance. Therefore, the magnetic induction proximity switch provided by the embodiment can adapt to the requirements of electric and thermal control alternating current and direct current and different voltage grades, and solves the matching problem of control systems of different users by passively controlling high-capacity dry contact output.
In one embodiment, as shown in fig. 1, 4, 5, the magnetically responsive proximity switch 10 is enclosed in a closed switch housing 103, the magnetic responsive sensor 102 is affixed to the bottom of the switch housing 103, and the magnetic steel moving component 101 is disposed on the top of the switch housing 103. This magnet steel moving part 101 includes the magnet steel, and when transmission shaft 20 rotated, drive magnet steel moving part 101 and rotate to make the magnetic field in the magnetic induction sensor 102 change, and lead to the contact in the magnetic induction sensor 102 to take place the upset, thereby the disconnection of control electric loop or switch on.
Specifically, the differential stroke of the blockage monitoring device can be controlled by controlling the relative position change of the magnetic steel moving part 101 and the magnetic induction sensor 102, that is, after the transmission shaft 20 rotates by a preset differential angle, the normally open or normally closed contact in the magnetic induction sensor 102 is turned over. The specific differential stroke can be set according to actual conditions.
Further, in an embodiment, the magnetic steel moving component 101 includes a magnetic steel bracket and a magnetic steel 1012, and fig. 7 illustrates a schematic structural diagram of the magnetic steel bracket according to an embodiment of the present invention. As shown in fig. 5 and 7, a first end of the magnetic steel bracket 1011 is fixedly connected to the transmission shaft 20, a second end of the magnetic steel bracket 1011 is fixed to the magnetic steel 1012, and the magnetic steel bracket 1011 and the magnetic induction sensor 102 maintain a predetermined angle, so that when the transmission shaft 20 rotates, a distance between the magnetic steel 1012 and the magnetic induction sensor 102 changes. As the distance changes, the magnetic steel 1012 weakens or strengthens the internal magnetic field of the magnetic induction sensor 102, causing the contacts inside the magnetic induction sensor 102 to flip.
In one embodiment, as shown in fig. 2, the first end of the transmission shaft 20 is provided with a second threaded hole 205, the first end of the magnetic steel bracket 1011 is provided with a second through hole 1013, and the transmission shaft 20 and the magnetic steel bracket 1011 are fixedly connected through any one of a jackscrew, a screw or a bolt passing through the second through hole 1013 and the second threaded hole 205. Like this, fixed through the screw hole, be convenient for to the dismantlement and the change of magnet steel support 1011. Here, the specific fixing manner is not limited, and the transmission shaft 20 and the magnetic steel bracket 1011 may be directly welded together, or the transmission shaft 20 and the magnetic steel bracket 1011 may be integrally formed. Further, in order to prevent magnetic field interference, the magnetic steel bracket 1011 is made of nylon material, which is non-toxic, light, and has excellent mechanical strength, wear resistance and corrosion resistance. Because of its light weight, it is more sensitive to detecting rotation of the drive shaft 20.
The magnetic induction proximity switch in the embodiment applies a weak magnetic reversal principle, adopts a passive design, adapts to the requirements of electric and thermal control alternating current and direct current and different voltage grades, and solves the matching problem of control systems of different users by passively controlling high-capacity dry contact output. Meanwhile, the non-contact sensing element of the magnetic induction sensor is provided with two groups of contacts of normally open contact and normally closed contact, has the characteristics of water resistance, dust resistance and acid and alkali resistance, and is isolated electromechanically to achieve the purposes of dust resistance and water resistance.
In addition, in order to prevent the magnetic steel moving component 101 from contacting the magnetic induction sensor 102 during the moving process, thereby increasing the frictional resistance between the magnetic steel moving component and the magnetic induction sensor 102, the minimum distance value between the magnetic induction sensor 102 and the magnetic steel moving component 101 is greater than the preset distance value during the moving process of the magnetic steel moving component 101. Namely, a certain gap is always kept between the magnetic steel moving component 101 and the magnetic induction sensor 102.
Further, in order to enable the detection baffle 30 to return to the original position quickly after the blockage fault is eliminated, the blockage monitoring device further includes a return spring 40 disposed in the housing, fig. 8 shows a schematic structural diagram of the return spring provided in the embodiment of the present invention, and as shown in fig. 1 and 8, the return spring 40 is sleeved on the transmission shaft 20, one end of the return spring is fixed inside the housing, and the other end of the return spring is connected to the detection baffle 30. Specifically, in one embodiment, as shown in fig. 2, a third circlip 203 is provided on the transmission shaft 20, and the return spring 40 is positioned with the third circlip 203 through a side wall of the inside of the housing of the blockage monitoring device. Preferably, in this embodiment, the return spring 40 is mounted on the drive shaft 20 at an end that is located differently from the magnetically inductive proximity switch 10. The invention can prevent partial materials from splashing on the detection baffle 30 and rotate the detection baffle 30 while utilizing the return spring 40 to quickly return, thereby causing the situation that the blockage monitoring device generates misoperation to occur.
In order to further prevent the material from splashing on the detection baffle plate and cause the blocking monitoring device to generate misoperation, as shown in fig. 1, the material of the detection baffle plate 30 is metal, the blocking monitoring device also comprises a position holding component 50, and the position holding component 50 is fixed on the inner side of the opening. The position holding member 50 includes a position holding magnet, and the position holding magnet attracts the detection flapper 30. Specifically, when a part of the material splashes onto the detection flapper 30, the position of the detection flapper 30 is kept unchanged due to the adsorption force of the position-keeping magnet, so that no rotation occurs. Preferably, the position retaining member 50 may be fixed inside a side wall of the housing of the blockage monitoring device adjacent to the opening.
In one embodiment, the position retaining member includes a position retaining bracket to which the position retaining magnet is fixed. Fig. 9 is a schematic structural view of a position holding bracket provided by an embodiment of the present invention. As shown in fig. 9, the position holding bracket 501 is provided with a third screw hole 5011, a side wall of the housing is provided with a third through hole, and the position holding bracket 501 and the side wall of the housing are fixedly connected by any one of a jackscrew, a screw, or a bolt through the third through hole and the third screw hole 5011. Here, the fixing means is not particularly limited. In this embodiment, as shown in fig. 9, a notch 5012 is provided in the position holding bracket 501, and the position holding magnet is fixed in the notch 5012. Preferably, a notch 5012 is provided at the free end of the position retaining bracket 501. Thus, the position holding bracket 501 can be easily removed and replaced by fixing the position holding bracket with the screw hole. Further, in order to prevent magnetic field interference, the position holding bracket 501 is made of nylon material.
In an embodiment, fig. 10 illustrates a second structural schematic diagram of the blockage monitoring device provided in the embodiment of the present invention. As shown in fig. 1 and 10, the housing of the blockage monitoring device includes a flange 70, a housing frame and a cover plate. The flange 70 is used to mount the blockage monitoring device to a head funnel or other containment device, and the cover plate is attached to the housing frame. Here, the material of the housing of the plug monitoring device is not limited. Preferably, the housing frame and the cover plate are made of metal for easy manufacturing and considering mechanical strength of materials.
Further, the side opposite to the opening of the housing of the blockage monitoring device is a cover plate, as shown in fig. 10, the cover plate includes an upper cover plate 601 and a lower cover plate 602, the upper cover plate 601 is parallel to the opening, one end of the lower cover plate 602 is connected to the upper cover plate 601, and the other end is connected to the bottom edge of the opening, so that the lower cover plate 602 and the opening form an acute angle of a second preset angle. That is, the lower cover plate 602 has a certain inclination with respect to the horizontal plane, so that the material can be discharged out of the housing under the action of gravity after the blockage failure is eliminated. To better describe the position of the lower cover plate 602 provided in this embodiment, fig. 11 shows a left side view of the housing provided in this embodiment of the present invention, and fig. 12 shows a right side view of the housing provided in this embodiment of the present invention, where the left and right are only used to distinguish fig. 11 and fig. 12, and the orientation of the housing is not limited.
Further, the vent holes are formed in the lower cover plate 602, so that on one hand, materials in the shell can be discharged conveniently, on the other hand, ventilation can be performed, the pressure in the shell is kept consistent with the outer side of the shell, and the phenomenon that the transmission shaft 20 cannot rotate when a material blocking fault occurs due to overlarge pressure in the shell of the detection baffle 30 to cause movement rejection is prevented.
The technical specification of the blockage monitoring device in the embodiment of the invention is as follows:
TABLE 1
| Parameter name | Require that |
| Rated voltage | ≤240V AC/DC |
| Switching value output | 1NO，1NC |
| Analog output | —— |
| Contact capacity | 2A |
| Control mode | Passive |
| Protection class | IP65 |
| Rated operation range | 35° |
| Differential stroke | 11° |
As can be seen from Table 1, the rated voltage of the blockage monitoring device provided by the invention is less than or equal to 240V, and the rated voltage can be alternating current voltage or direct current voltage; the switching value output is an NO (Normally Open) contact and an NC (Normally closed) contact, wherein the capacity of the contacts is 2A; the control mode is passive control; the protection grade of the shell of the material blockage monitoring device is IP 65; the rated action range is 35 degrees, which means that the rated rotation angle of the transmission shaft is 35 degrees; the differential travel is 11 °, i.e. when the rotation angle of the propeller shaft is 11 °, the normally open or normally closed contacts flip.
In the blockage monitoring device provided by the invention, when a blockage fault occurs, the material level reaches the height of the detection baffle, and the detection baffle rotates under the pushing of the material and drives the transmission shaft to rotate; when the transmission shaft rotates, the magnetic steel moving part is driven to rotate, so that the magnetic field inside the magnetic induction sensor changes, contacts in the magnetic induction sensor are turned over, and the electric circuit is controlled to be disconnected or connected. Wherein, mechanical power mechanism adopts direct mechanics sampling like detecting baffle, transmission shaft, magnetic induction proximity switch, has guaranteed the accurate definite of measuring. After the blockage fault is eliminated, the detection baffle returns to the original position under the action of gravity and a return spring, the position retaining magnet adsorbs the detection baffle, and meanwhile, the lower cover plate keeps a certain inclination angle and is provided with a vent hole, so that the blockage monitoring device cannot generate misoperation or fail. The magnetic induction proximity switch is adopted, a non-contact sensing element is adopted, no requirement is required on the environmental temperature, and the requirements of water resistance, dust resistance and acid and alkali resistance on severe environments are met. In addition, the magnetic induction proximity switch adopts a passive design, is suitable for the requirements of electric and thermal control alternating current and direct current and different voltage grades, has wide adaptability and has no selectivity to a power supply. Therefore, the blockage monitoring device provided by the invention is suitable for the coal conveying system of the thermal power plant in large dust, humid environment and different control strategies, namely different operation environments of the control system, and can realize accurate, stable and reliable detection of blockage faults.
Example two:
fig. 13 shows a schematic structural diagram of a head funnel according to an embodiment of the present invention, as shown in fig. 13, the head funnel includes a funnel body 100 and a blockage monitoring device 200 according to the first embodiment, the blockage monitoring device 200 is disposed on an outer wall of the funnel body 100, and an opening is disposed on the outer wall, and the opening is matched with an opening of a housing of the blockage monitoring device 200.
During installation, the plane of the flange 70 of the blockage monitoring device 200 needs to be perpendicular to the horizontal plane. This putty monitoring device 200 can not install in the position that receives the material stream impact or bulk material to splash, also can not install in when the putty trouble takes place, the height that the material can not reach.
Preferably, the distance between each side of the opening and the corresponding flange edge of the flange 70 is, but not limited to, about 10 mm.
As shown in fig. 13, the hopper body 100 includes a feeding port 1100 and a blanking port 1200, and preferably, according to practical operation experience, a material blockage fault often occurs in a three-way pipe of the blanking port 1200 of the hopper body 100 or a bent part of the upper portion of the hopper body 100, and the middle lower portion of the head hopper is not blocked, and it cannot be guaranteed that no material blockage exists in the upper portion, so that the material blockage monitoring device is installed in the lower portion of the feeding port 1100.
In the embodiment provided by the invention, the head funnel comprises a blocking monitoring device, wherein the blocking monitoring device comprises a shell with an open side, a magnetic induction proximity switch, a transmission shaft and a detection baffle; the shell is hollow, the transmission shaft penetrates through the upper part of the shell and is rotationally connected with the shell, and the magnetic induction proximity switch is arranged on the outer side of the shell; the detection baffle is arranged at the opening of the shell, one end of the detection baffle is fixed on the transmission shaft, so that the detection baffle rotates to drive the transmission shaft to rotate, and the magnetic induction proximity switch controls the disconnection or the connection of an electric loop after detecting that the transmission shaft rotates. According to the blockage monitoring device, a mechanical sampling mode is adopted, when a blockage fault occurs, the material level reaches the height of the detection baffle, the detection baffle rotates under the pushing of a material, and the transmission shaft is driven to rotate; when the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection of the electric loop is controlled, and therefore the effect of detecting whether material is blocked is achieved. Therefore, the head funnel provided by the invention ensures that the blockage fault detection is not influenced by the severe production environment of the coal conveying system, and realizes accurate and reliable detection of the blockage fault of the belt conveyor.
Example three:
fig. 14 is a schematic structural diagram illustrating a transmission control system according to an embodiment of the present invention. As shown in fig. 14, the transfer control system includes a belt conveyor 3000, an upper computer 2000, and a head hopper 1000 according to the second embodiment. The upper computer 2000 receives an alarm signal transmitted by the magnetic induction sensor 102, and controls the starting and stopping of the belt conveyor 3000.
The upper computer 2000 may be, but not limited to, a PLC (Programmable Logic Controller), a DCS (Distributed Control System), or a single chip microcomputer.
In the use process of the embodiment, when a material blocking fault occurs, the material level reaches the height of the detection baffle, and the detection baffle rotates under the pushing of the material and drives the transmission shaft to rotate; when the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection of the electric loop is controlled, so that the magnetic induction sensor sends an alarm signal to the upper computer, the upper computer sends a shutdown command, and the belt conveyor is controlled to be shut down.
Further, in order to prevent part of the materials from splashing on the detection baffle plate and enable the blocking monitoring device to generate misoperation, the transmission control system further comprises a delay circuit, and the delay circuit is connected with the upper computer 2000. After the upper computer 2000 receives the alarm signal, the delay circuit is used for delaying, the delay time is not limited, and the delay time can be specifically set according to the actual application condition. When the delay time is up, the alarm signal still exists, and the upper computer 2000 sends out a stop command to control the belt conveyor 3000 to stop. If the alarm signal disappears after the delay time is up, the upper computer 2000 automatically ignores the received alarm signal and does not send a stop command, so that the situation that part of the materials are splashed onto the detection baffle plate and the blocking monitoring device generates misoperation is prevented.
The head funnel and the transmission control system provided by the embodiment of the invention have the same technical characteristics as the blockage monitoring device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the head funnel and the transmission control system described above may refer to the corresponding processes in the foregoing embodiments of the blockage monitoring device, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A blockage monitoring device is characterized by comprising a shell with an open side, a magnetic induction proximity switch, a transmission shaft and a detection baffle;
the magnetic induction proximity switch is arranged on the outer side of the shell; the magnetic induction proximity switch comprises a magnetic steel moving part and a magnetic induction sensor; a first elastic check ring and a second elastic check ring are arranged on the transmission shaft;
the detection baffle is arranged at the opening of the shell, and one end of the detection baffle is fixed on the transmission shaft so as to enable the detection baffle to rotate and drive the transmission shaft to rotate; the detection baffle comprises a fixed sleeve and a steel plate, and the fixed sleeve is fixed at one end of the steel plate and is fixedly connected with the transmission shaft; the steel plate is bent to form an obtuse angle of a first preset angle, and the opening direction of the obtuse angle points to the outside of the shell;
and after the magnetic induction proximity switch detects that the transmission shaft rotates, the disconnection or the connection of an electric loop is controlled.
2. The plugging monitoring device of claim 1, wherein the magnetically induced proximity switch comprises a magnetic steel moving part and a magnetic induction sensor; the magnet steel moving part comprises a magnet steel support and magnet steel, the first end of the magnet steel support is fixedly connected with the transmission shaft, the second end of the magnet steel support is fixed with the magnet steel, and the magnet steel support and the magnetic induction sensor keep a preset angle, so that when the transmission shaft rotates, the magnet steel and the distance between the magnetic induction sensors are changed.
3. The blockage monitoring device according to claim 1, further comprising a return spring disposed in the housing, wherein the return spring is sleeved on the transmission shaft, one end of the return spring is fixed inside the housing, and the other end of the return spring is connected to the detection baffle.
4. The blockage monitoring device of claim 1, further comprising a position retaining member secured inside the opening;
the position holding member includes a position holding magnet that attracts the detection flapper.
5. The blockage monitoring device according to any one of claims 1 to 4, wherein the side of the housing opposite to the opening is a cover plate, the cover plate comprises an upper cover plate and a lower cover plate, the upper cover plate is parallel to the opening, one end of the lower cover plate is connected with the upper cover plate, and the other end of the lower cover plate is connected with the bottom edge of the opening, so that the lower cover plate and the opening form an acute angle of a second preset angle.
6. A transmission control system is characterized by comprising a belt conveyor, an upper computer and a head funnel;
the head funnel includes: the material blockage monitoring device comprises a funnel body and the material blockage monitoring device as claimed in any one of claims 1 to 5, wherein the material blockage monitoring device is arranged on the outer wall of the funnel body, an opening is arranged on the outer wall, and the opening is matched with an opening of a shell of the material blockage monitoring device;
and the upper computer receives the alarm signal sent by the magnetic induction sensor and controls the starting and stopping of the belt conveyor.
7. The transmission control system according to claim 6, further comprising a delay circuit, the delay circuit being connected to the upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710310012.8A CN108792513B (en) | 2017-05-04 | 2017-05-04 | Putty monitoring devices, head funnel and transmission control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710310012.8A CN108792513B (en) | 2017-05-04 | 2017-05-04 | Putty monitoring devices, head funnel and transmission control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108792513A CN108792513A (en) | 2018-11-13 |
| CN108792513B true CN108792513B (en) | 2020-05-12 |
Family
ID=64053690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710310012.8A Active CN108792513B (en) | 2017-05-04 | 2017-05-04 | Putty monitoring devices, head funnel and transmission control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108792513B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443417A (en) * | 2018-12-07 | 2019-03-08 | 无锡先导智能装备股份有限公司 | Sealing machine and its blocked-material detecting device |
| CN111088588A (en) * | 2019-12-02 | 2020-05-01 | 宁波慈星股份有限公司 | Steel wire conveying device of flat knitting machine |
| CN111874381A (en) * | 2020-07-15 | 2020-11-03 | 红云红河烟草(集团)有限责任公司 | Cigarette carton detection device for cigarette carton beautifying device inlet |
| CN112811122B (en) * | 2020-12-31 | 2022-07-19 | 大连华锐重工集团股份有限公司 | Anti-blocking system for hopper of grab ship unloader |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3897868A (en) * | 1974-07-01 | 1975-08-05 | Smitherm Industries | Constant rate feeder |
| DE3403430A1 (en) * | 1984-02-01 | 1985-08-08 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for protecting conveying troughs |
| CN101450750A (en) * | 2007-12-07 | 2009-06-10 | 郭云昌 | Alarming device for material cut-off of conveyer belt |
| CN102616506A (en) * | 2011-01-28 | 2012-08-01 | 淮南矿业(集团)有限责任公司 | Coal level alarm device for coal bunker |
| CN202098824U (en) * | 2011-05-11 | 2012-01-04 | 太原钢铁(集团)有限公司 | Belt conveyor blocking stop opening-closing device |
| CN203529365U (en) * | 2013-11-12 | 2014-04-09 | 武汉钢铁(集团)公司 | Belt stoppage detecting device |
| CN106241304B (en) * | 2015-06-05 | 2018-09-28 | 广东大唐国际潮州发电有限责任公司 | A kind of novel feeder chute blockage switch |
-
2017
- 2017-05-04 CN CN201710310012.8A patent/CN108792513B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108792513A (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108792513B (en) | Putty monitoring devices, head funnel and transmission control system | |
| US11773856B1 (en) | Detecting and utilizing a rise rate for sump pump system control | |
| CN106015893B (en) | Lubricating device with a control unit for operating a lubricating pump | |
| CN205076428U (en) | Screw conveyer with wear -resistant coating casing and electrical protection | |
| CN211811985U (en) | Induction mechanism and thermal power factory coal breakage pipe chute blockage detection device | |
| KR200328796Y1 (en) | Capacitive type level sensor for water purifier system | |
| US3077988A (en) | Filter detector | |
| CN111457518B (en) | Humidifier | |
| WO2008056387A1 (en) | System and device for detecting the blockage of pipes particularly for siphons of discharge ducts. | |
| CN210102757U (en) | Chain breakage detection device for double-scraper chain embedded scraper coal feeder | |
| CN201695820U (en) | Interlocking device of pass box in dust-free room | |
| CN110294286A (en) | A kind of feed blocking detection device | |
| CN206132175U (en) | Gravity pendulum -type aggregate material level ware | |
| CN212892410U (en) | Coal feeder skid alarm device | |
| CN203705010U (en) | Material level detection device of dry quenching dust remover | |
| CN207645241U (en) | A kind of drag conveyor skews protective device | |
| CN113148680A (en) | Material adding system and detection device thereof | |
| US20200279468A1 (en) | Method and Apparatus for Monitoring and Reporting Salt Level in a Water Softener | |
| CN220665077U (en) | Aeration disc device with self-detection function for sewage treatment | |
| CN215158595U (en) | Blanking pipe blanking material detection device | |
| CN202229802U (en) | Novel single pendulous material level detector | |
| CN216248030U (en) | Signal acquisition device of vertical or inclined blanking pipe | |
| CN213599385U (en) | Scraper conveyor second discharge gate ash blocking device in environmental protection industry | |
| CN220866227U (en) | Powder limiting and early warning device | |
| CN219566847U (en) | Bucket-wheel stacker reclaimer funnel flash detection device and alarm control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |