CN213041316U - Piston charge level indicator based on negative pressure drive - Google Patents
Piston charge level indicator based on negative pressure drive Download PDFInfo
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- CN213041316U CN213041316U CN202021878262.5U CN202021878262U CN213041316U CN 213041316 U CN213041316 U CN 213041316U CN 202021878262 U CN202021878262 U CN 202021878262U CN 213041316 U CN213041316 U CN 213041316U
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- piston
- negative pressure
- gland
- base pipe
- hopper
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Abstract
The utility model discloses a piston type charge level indicator based on negative pressure driving, belonging to the technical field of charge level indicators and comprising a proximity switch; it is characterized by at least comprising: a base pipe for penetrating the wall of the hopper of the dust remover; the base pipe comprises a pipe body, and a convex ring is arranged inside the pipe body; the gland is fixed on the outer end surface of the base pipe; a plurality of vent holes are formed in the gland; a piston disposed within the base tube; a through hole through which the piston rod passes is formed in the central shaft of the gland; a return spring located between the piston and the collar; the trigger piece is fixed at the end part of the piston rod; the proximity switch is fixedly connected with the gland or the base pipe through the connecting sheet. The utility model discloses install the detecting element of charge level indicator in the hopper outside, negative pressure through in the dust remover hopper is as the power supply, and then adsorbs the piston motion, and the motion through the piston drives proximity switch's trigger member action afterwards, realizes detecting the purpose, and this structure can prevent the harm of dust to sensitive element.
Description
Technical Field
The utility model belongs to the technical field of the charge level indicator, concretely relates to piston charge level indicator based on negative pressure drive.
Background
As is well known, a level indicator arranged on a hopper of a dust remover is mainly used for automatically detecting the limit level of the dust removing hopper and transmitting a detection signal to a PLC (programmable logic controller) for automatically controlling ash discharge. Due to the harsh environment in the dedusting hopper, most of the existing level meters are easy to damage, such as a rotation-resisting level switch, a vibrating rod level switch, a capacitance level switch and the like, which are generally damaged after being used for about half a year. The damaged material level switch cannot accurately measure the material level in the hopper.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem who exists among the well-known technique, provide a piston charge level indicator based on negative pressure drive for prevent the dust and to the damage of charge level indicator, install the detecting element of charge level indicator in the hopper outside, through the negative pressure in the dust remover hopper as the power supply, and then adsorb the piston motion, the motion through the piston drives proximity switch's trigger component action afterwards, finally realizes detecting.
The utility model aims at providing a piston charge level indicator based on negative pressure drive, include:
a proximity switch (6);
a base pipe (4) penetrating through the wall of the dust remover hopper; the base pipe (4) comprises a pipe body (4-1), and a convex ring (4-2) is arranged inside the pipe body (4-1);
a gland (1) fixed on the outer end surface of the base pipe (4); a plurality of vent holes are formed in the gland (1);
a piston (2) disposed within the base tube (4); a through hole through which a piston rod passes is formed in a central shaft of the gland (1);
a return spring (3) positioned between the piston (2) and the convex ring (4-2);
a trigger (7) fixed to the end of the piston rod;
the proximity switch (6) is fixedly connected with the gland (1) or the base pipe (4) through the connecting sheet (5).
Preferably, the outer wall of the base pipe (4) is provided with N soot blowing holes (4-3), wherein N is a natural number.
Preferably, the gland (1) comprises a fixing part (1-1) connected with the base pipe (4) and a guide pipe (1-2) for protecting the piston rod, the fixing part (1-1) is provided with a vent hole and a through hole, the guide pipe (1-2) and the fixing part (1-1) are of an integrally formed structure, and the guide pipe (1-2) and the through hole are in a coaxial relationship.
Preferably, the connecting piece (5) and the piston rod are parallel to each other.
Preferably, two proximity switches are mounted on the connecting piece (5).
Preferably, the trigger (7) comprises: the piston rod is sleeved with a connecting sleeve (7-1), a fastening screw (7-2) arranged on the side wall of the connecting sleeve (7-1), and a trigger metal block (7-3) fixed on the side wall of the connecting sleeve (7-1).
Preferably, two negative pressure piston level gauges are mounted on each precipitator hopper.
The utility model has the advantages and positive effects that:
the utility model discloses install the detecting element of charge level indicator in the hopper outside, through the negative pressure in the dust remover hopper as the power supply, and then adsorb the piston and survey the motion in to the hopper, the motion through the piston drives proximity switch's trigger member action afterwards, finally realizes detecting the purpose, and this structure can prevent the harm of dust to sensitive element, prolongs its life.
Drawings
FIG. 1 is an exploded view of a preferred embodiment of the present invention;
FIG. 2 is a first view structural diagram of the gland in the preferred embodiment of the present invention;
FIG. 3 is a second view structural diagram of the gland in the preferred embodiment of the present invention;
FIG. 4 is a view showing a first perspective of a piston according to a preferred embodiment of the present invention;
FIG. 5 is a second perspective view of the piston according to the preferred embodiment of the present invention;
fig. 6 is an assembly view of the preferred embodiment of the present invention;
FIG. 7 is a block diagram of the trigger of the preferred embodiment of the present invention;
FIG. 8 is a block diagram of the base pipe in the preferred embodiment of the present invention;
fig. 9 is a block diagram of a proximity switch in a preferred embodiment of the present invention.
Wherein: 1. a gland; 1-1, a fixed part; 1-2, a guide pipe; 2. a piston; 3. a return spring; 4. a base pipe; 4-1, a pipe body; 4-2, a convex ring; 4-3, blowing ash holes; 4-4, screw thread; 5. connecting sheets; 6. a proximity switch; 7. a trigger; 7-1, connecting a sleeve; 7-2, fastening screws; 7-3, triggering a metal block.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 9, the technical solution of the present invention is:
a piston level gauge based on negative pressure actuation, comprising:
a proximity switch 6;
a base pipe 4 for penetrating the wall of the hopper of the dust remover; the base pipe 4 comprises a pipe body 4-1, and an annular bulge, namely a convex ring 4-2, is arranged inside the pipe body 4-1;
a gland 1 fixed on the outer end surface of the base pipe 4; a plurality of vent holes are formed in the gland 1; the inside and outside in the preferred embodiment refer to the inside and outside of the dust removal bin; the gland 1 is connected with the base pipe 4 through threads 4-4;
a piston 2 disposed within the base pipe 4; a through hole through which the piston rod passes is formed in the central shaft of the gland 1, and the gland 1 can realize the filtering function;
a return spring 3 located between the piston 2 and the convex ring 4-2;
a trigger 7 fixed to the end of the piston rod;
the proximity switch 6 is fixedly connected with the gland 1 or the base pipe 4 through a connecting sheet 5.
The working principle of the preferred embodiment is as follows:
in the preferred embodiment, the detection element of the level gauge is arranged on the outer side of the hopper, when the hopper of the dust remover works, large negative pressure can be generated inside the hopper of the dust remover, at the moment, the negative pressure in the hopper of the dust remover serves as a power source, the adsorption piston moves towards the inner side of the bin, then the trigger piece 7 is driven to move through the movement of the piston, and when the trigger piece 7 reaches the position of the proximity switch, the proximity switch generates a trigger signal and further transmits the trigger signal to the PLC; finally, the detection purpose is realized.
On the basis of the above-described preferred embodiment,
in order to realize the smooth movement of the piston and prevent dust from entering the blocked piston, the outer diameter of the piston is slightly smaller than the inner diameter of the base tube, and because a small gap exists between the piston and the base tube, the dust can be accumulated, and in order to prevent the dust from accumulating between the piston and the base tube and causing the piston to stop moving, N soot blowing holes 4-3 are arranged on the outer wall of the base tube 4, wherein N is a natural number, such as 3-12; in order to avoid blowing the ash hole pressure release too big, for this quantity of blowing the hole is difficult too much, through experimental detection, dust remover hopper during operation, the inside negative pressure that produces is great, consequently, rationally set up the size and the quantity of blowing the ash hole, under the prerequisite that does not influence the detection, the air current in the inside air current of parent tube 4 and the air current in the outside are through blowing the ash hole convection current, at the in-process of convection current, take out the ash of inside, prevent to pile up between piston and parent tube.
The gland 1 comprises a fixing part 1-1 connected with the base pipe 4 and a guide pipe 1-2 protecting the piston rod, wherein the fixing part 1-1 is provided with a vent hole and a through hole, the guide pipe 1-2 and the fixing part 1-1 are of an integrally formed structure, and the guide pipe 1-2 and the through hole are in a coaxial relationship.
As shown in fig. 6, the connecting piece 5 and the piston rod are parallel to each other.
Two proximity switches are mounted on the connecting piece 5. Aiming at two proximity switches on the upper negative pressure piston type material level meter, one proximity switch is used for sending an instruction for starting ash discharge to the PLC, and the other proximity switch is used for sending a timing starting instruction to the PLC, namely calculating ash discharge duration; aiming at two proximity switches on a lower negative pressure piston type material level meter, one proximity switch is used for sending an instruction for removing ash discharge to a PLC, and the other proximity switch is used for sending a timing starting instruction to the PLC, namely the calculation of ash deposition duration;
in order to facilitate adjustment of the position of the trigger block and maintenance or repair, as shown in fig. 7, the trigger 7 includes: the connecting sleeve 7-1 is sleeved with the piston rod, the fastening screw 7-2 is installed on the side wall of the connecting sleeve 7-1, and the triggering metal block 7-3 is fixed on the side wall of the connecting sleeve 7-1.
Two negative pressure piston type charge level indicators are arranged on each dust remover hopper.
When the dust remover is used, two negative pressure piston type material level meters are installed on each dust remover hopper, the negative pressure piston type material level meter positioned above is used for detecting the upper limit of dust, and the negative pressure piston type material level meter positioned below is used for detecting the lower limit of dust; the base pipe 4 is obliquely arranged on the wall of the hopper, in order to reduce dust entering the base pipe 4, the height of an inner port of the base pipe 4 is smaller than that of an outer port, and the surface of the inner port is a wedge-shaped surface, namely the surface of the inner port is not vertical to the axis of the base pipe 4; the working principle of two negative pressure piston type level gauges is the same, and for avoiding redundancy, a specific working principle is explained here by taking one as an example:
the dust remover can generate large negative pressure in the hopper during operation, and the accumulated amount of dust in the hopper is more and more along with the prolonging of time; when the accumulated amount of dust is less (the accumulated height of the dust does not reach the height of an inner port of the upper base pipe), the negative pressure in the hopper continuously generates a large attraction force on a piston of the upper negative pressure piston type level gauge, the piston of the upper negative pressure piston type level gauge drives a trigger of the upper negative pressure piston type level gauge under the action of the attraction force, a return spring of the upper negative pressure piston type level gauge is compressed to move into the hopper, namely the return spring of the upper negative pressure piston type level gauge is in a compressed state, then the trigger of the negative pressure piston type level gauge gradually approaches a proximity switch of a near end (a proximity switch on the right side in figure 6), and at the moment, the PLC does not receive a trigger instruction of the far end proximity switch, and then the ash unloading action is not executed; when the accumulated amount of dust is large (the accumulated height of the dust reaches the height of the inner port of the base pipe of the upper negative pressure piston type level indicator, and the inner port of the base pipe of the upper negative pressure piston type level indicator is gradually blocked), the negative pressure in the hopper continuously generates a gradually reduced attraction force to the piston of the upper negative pressure piston type level indicator, when the attraction force is gradually reduced, the piston of the upper negative pressure piston type level indicator gradually loses the attraction force, when the extension force of the return spring of the upper negative pressure piston type level indicator is larger than the attraction force of the negative pressure, under the drive of the return spring of the upper negative pressure piston type material level meter, the piston of the upper negative pressure piston type material level meter drives the trigger piece to start moving leftwards, when the upper trigger piece reaches the position of the left proximity switch, the proximity switch on the left side of the negative pressure piston type material level meter is triggered to act, and the proximity switch corresponds to the PLC to immediately execute an ash discharging action; arrange grey back, the dust accumulation in the hopper reduces once more, the port resumes in proper order and switches on in the parent tube of going up negative pressure piston charge level indicator this moment and the port in the lower parent tube, along with switching on of port in two parent tubes, under two reset spring's effort, two pistons all drive the trigger piece and move to the right side, when the trigger piece of negative pressure piston charge level indicator reachd the proximity switch on negative pressure piston charge level indicator right side down, PLC starts to remove the ash discharge instruction this moment, the dust in the hopper then begins the accumulation once more, begin to repeat above-mentioned working process absolutely.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (7)
1. A piston type level gauge based on negative pressure driving comprises a proximity switch (6); it is characterized by at least comprising:
a base pipe (4) penetrating through the wall of the dust remover hopper; the base pipe (4) comprises a pipe body (4-1), and a convex ring (4-2) is arranged inside the pipe body (4-1);
a gland (1) fixed on the outer end surface of the base pipe (4); a plurality of vent holes are formed in the gland (1);
a piston (2) disposed within the base tube (4); a through hole through which a piston rod passes is formed in a central shaft of the gland (1);
a return spring (3) positioned between the piston (2) and the convex ring (4-2);
a trigger (7) fixed to the end of the piston rod;
the proximity switch (6) is fixedly connected with the gland (1) or the base pipe (4) through the connecting sheet (5).
2. The piston type material level indicator based on negative pressure driving as claimed in claim 1, wherein the outer wall of the base pipe (4) is provided with N ash blowing holes (4-3), N is a natural number.
3. The piston type material level indicator based on negative pressure driving as claimed in claim 1, wherein the gland (1) comprises a fixing part (1-1) connected with the base pipe (4) and a guide pipe (1-2) protecting the piston rod, the fixing part (1-1) is provided with a vent hole and a through hole, the guide pipe (1-2) and the fixing part (1-1) are of an integral structure, and the guide pipe (1-2) and the through hole are in a coaxial relationship.
4. The piston-type level gauge based on negative pressure drive according to claim 1, characterized in that the connecting piece (5) and the piston rod are parallel to each other.
5. The piston-type level gauge based on negative pressure actuation according to claim 1, characterized in that two proximity switches are mounted on the connecting piece (5).
6. The negative pressure driven piston-type level gauge according to claim 1, wherein the trigger (7) comprises: the piston rod is sleeved with a connecting sleeve (7-1), a fastening screw (7-2) arranged on the side wall of the connecting sleeve (7-1), and a trigger metal block (7-3) fixed on the side wall of the connecting sleeve (7-1).
7. The piston level gauge based on negative pressure actuation according to any of claims 1-6, characterized in that two piston level gauges are mounted on each precipitator hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021878262.5U CN213041316U (en) | 2020-09-01 | 2020-09-01 | Piston charge level indicator based on negative pressure drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021878262.5U CN213041316U (en) | 2020-09-01 | 2020-09-01 | Piston charge level indicator based on negative pressure drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213041316U true CN213041316U (en) | 2021-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021878262.5U Active CN213041316U (en) | 2020-09-01 | 2020-09-01 | Piston charge level indicator based on negative pressure drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213041316U (en) |
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2020
- 2020-09-01 CN CN202021878262.5U patent/CN213041316U/en active Active
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