CN209820575U - Fill level measuring system - Google Patents

Abstract

The utility model relates to a material level measuring system, which comprises a material level meter component, a sleeve and a blowing component, wherein the material level meter component comprises a probe rod, and the probe rod is sleeved and matched with the sleeve; the sleeve pipe has the uncovered, and the gas outlet of the subassembly of blowing communicates with the inner chamber of sleeve pipe. One end of the sleeve is provided with an opening, the other end of the sleeve is provided with an end cover, the end cover is provided with a rod hole and an air inlet hole, the probe rod penetrates through the rod hole to be sleeved in the sleeve, and the air outlet end of the air blowing assembly is connected with the air inlet hole. Part of the probe rod extends out of the sleeve from the opening. Blow to the sheathed tube inner chamber through the subassembly of blowing, because sheathed tube gather wind effect, the dust on the surface of probe rod can be blown off with bigger blowing force to can effectively prevent the charge level meter subassembly wrong report police.

Description

Fill level measuring system

Technical Field

The utility model relates to a material level measurement system.

Background

In general, some systems of power plants and chemical plants need to measure the height of materials, and perform related operations according to the height of the materials, which requires that the material level measuring device can accurately and reliably measure the height of the materials.

The material level measuring device is provided with the insertion rod, the insertion rod is easy to drop ash, the ash drops to a certain degree, even if the actual material at the moment does not reach the alarm height, the material level measuring device is easy to alarm, and the false alarm is not beneficial to the operations of online monitoring, ash conveying, slag discharging and the like of an operator.

In the daily operation of the unit, regular sampling inspection work needs to be made, and the false alarm of the material level measuring device is prevented through manual disassembly, purging and reloading processes. However, the workload is large, the sampling inspection range is limited, the procedures are complicated, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem of providing a material level measuring system which can prevent false alarm.

The technical scheme of the utility model as follows:

a material level measuring system comprises a material level meter assembly, a sleeve and a blowing assembly, wherein the material level meter assembly comprises a probe rod, and the probe rod is in sleeve joint with the sleeve; the sleeve is provided with an opening, and an air outlet of the air blowing assembly is communicated with an inner cavity of the sleeve.

Preferably, in the above level measuring system, one end of the sleeve has an opening, and the other end of the sleeve is a closed end.

Preferably, in the above material level measuring system, one end of the sleeve has an opening, the other end of the sleeve has an end cover, the end cover has a rod hole and an air inlet, the probe rod passes through the rod hole and is sleeved in the sleeve, and the air outlet end of the air blowing assembly is connected with the air inlet.

Preferably, in the above material level measuring system, the blowing assembly includes an air tube, and an air outlet end of the air tube is connected to the air inlet hole.

Preferably, in the above level measuring system, the level measuring system further comprises an air source isolation door, and the air source isolation door is disposed on the air pipe.

Preferably, in the above level measuring system, the level measuring system further includes a controller and an electromagnetic valve, the electromagnetic valve being disposed on the air pipe.

Preferably, in the above level measuring system, a part of the probe rod extends from the opening to the outside of the sleeve.

Preferably, in the above level measuring system, a center line of the rod hole is collinear with an axis of the sleeve.

Preferably, in the above level measuring system, the number of the air intake holes is at least two, and at least two of the air intake holes are uniformly distributed on the periphery of the rod hole along the circumferential direction.

Preferably, in the above level measuring system, the air blowing assembly includes a compressed air storage tank.

The utility model has the advantages that: the inner cavity of the sleeve is blown by the blowing assembly, and due to the wind gathering effect of the sleeve, the dust on the surface of the probe rod can be blown off by the gas with larger blowing force, so that the false alarm of the level meter assembly can be effectively prevented.

Drawings

Fig. 1 is a schematic structural view of a level gauge assembly in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a material level measuring system in embodiment 1 of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

fig. 4 is a schematic structural view of an end cap in embodiment 1 of the present invention;

fig. 5 is a schematic view of an open structure of the sleeve in embodiment 1 of the present invention.

The component names and designations in the drawings are as follows:

the device comprises a probe rod 11, a probe 12, a sleeve 20, an opening 21, an end cover 22, a rod hole 221, an air inlet hole 222, an air pipe 30, a branch pipe 31, an air source isolation door 40 and a compressed air storage tank 50.

Detailed Description

Example 1

Fig. 1 is a schematic structural diagram of the level gauge assembly of this embodiment, the level gauge assembly includes a probe 11 and a probe 12, the probe 12 has a power supply and a signal feedback line therein, and the probe 12 can send a level alarm signal to DCS screen monitoring or logic through a signal cable for related configuration.

The normal material level alarming process is as follows: in the ash removal program control process, the ash hopper can continuously feed ash, when the material level reaches the height capable of burying the probe rod 11, the probe rod 11 can be acted by dust gravity to trigger the action of a microswitch in the material level meter component to cause the material level meter component to send an alarm signal, and the alarm signal is sent to DCS picture monitoring or logic through a signal cable to carry out relevant configuration.

But when the ash removal system of unit carries out programme-controlled ash removal operation, the dust can continuously fall grey to ash bucket, at the ash in-process that falls, the easy deposition in surface of probe rod 11, after the deposition reaches certain degree, even the inside material level of ash bucket does not reach the warning height, but because probe rod 11 receives the effect of deposition gravity still can trigger the inside micro-gap switch action of charge level indicator subassembly and lead to the signal that the charge level indicator subassembly sent the warning, the warning at this moment is the wrong report police, influences the picture monitoring.

As shown in fig. 2, the present embodiment is to provide a material level measuring system capable of preventing false alarm, the material level measuring system of the present embodiment includes a material level meter component, a sleeve 20 and a blowing component, the material level meter component includes a probe rod 11, and the probe rod 11 is in sleeve fit with the sleeve 20; the sleeve 20 has an opening 21, and the air outlet of the blowing assembly is communicated with the inner cavity of the sleeve 20. The advantages of this embodiment are: the blowing assembly blows air to the inner cavity of the sleeve 20, and due to the wind gathering effect of the sleeve 20, the air can blow off dust on the surface of the probe rod 11 with larger blowing force, so that false alarm of the level meter assembly can be prevented.

The sleeve 20 has an open end 21 at one end and a closed end at the other end, the closed end has a rod hole 221, and the probe 11 passes through the rod hole 221 and is sleeved in the sleeve 20. The advantage of the other end of the sleeve 20 being a closed end is: the blowing force of the gas can be further increased relative to the sleeve 20 having both open ends, and the effect of removing dust on the surface of the probe 11 can be further increased. As shown in fig. 5, the size of the opening 21 may be set as desired.

The other end of the sleeve 20 has an end cap 22. the end cap 22 may be welded to the sleeve 20, or the end cap 22 may be integrally formed with the sleeve 20. The end cap 22 forms the closed end described above. The end cap 22 is provided with an air inlet hole 222 in addition to the rod hole 221, the air outlet end of the air blowing assembly is connected with the air inlet hole 222, and the air outlet of the air blowing assembly is communicated with the inner cavity of the sleeve 20.

The probe 11 and the casing 20 may be arranged in parallel, that is, the probe 11 is arranged horizontally, and the casing 20 is also arranged horizontally. Part of the probe 11 extends from the opening 21 to the outside of the casing 20, and although part of the probe 11 extends from the casing 20, since the gas of the blowing assembly finally exits from the opening 21, the blowing force of the gas exiting from the opening 21 can still act on the probe 11 located outside the casing 20. Since a part of the probe 11 can be located outside the casing 20, the length of the casing 20 can be set to be short, and the length of the casing 20 can be shorter than that of the probe 11, so that the material and cost of the casing 20 can be saved. Specifically, one end of the probe 11 is connected to the probe 12, and the other end of the probe 11 extends from the opening 21 to the outside of the sleeve 20, and the length of the probe extending out of the sleeve 20 can be determined according to the wind power of the blowing assembly, the thickness of the sleeve 20, and the like, so that dust on the probe 11 extending out of the sleeve 20 can be blown off.

As shown in fig. 4, the center line of the rod hole 221 is collinear with the axis of the sleeve 20, and after the probe 11 is fitted into the sleeve 20 through the rod hole 221, the center line of the probe 11 is collinear with the axis of the sleeve 20, so that the blowing force of the gas entering the sleeve 20 can be more uniformly applied to the outer circumferential surface of the probe 11, thereby improving the uniformity of ash removal.

The blowing assembly comprises a gas pipe 30, and the gas outlet end of the gas pipe 30 is connected with the gas inlet hole 222. The advantage of providing the air tube 30 is: it is convenient to provide a valve on the air tube 30 to control when air is introduced into the cannula 20.

The level measuring system further comprises an air source isolation door 40, and the air source isolation door 40 is arranged on the air pipe 30. When the probe 11 needs to be ash-removed, the air source isolation door 40 is manually operated, so that air enters the sleeve 20 from the air pipe 30.

The number of the air inlet holes 222 is at least two, and the at least two air inlet holes 222 are uniformly distributed at the periphery of the rod hole 221 along the circumferential direction, so that the uniformity of the ash removing gas entering the sleeve 20 is improved. Accordingly, the air pipe 30 includes at least two branch pipes 31, and the at least two branch pipes 31 are disposed in one-to-one correspondence with the at least two air inlet holes 222.

As shown in fig. 4, the number of the air intake holes 222 may be two. As shown in fig. 3, the air tube 30 includes two branch tubes 31, respectively, an air outlet end of one branch tube 31 is connected to one air inlet hole 222, and an air outlet end of the other branch tube 31 is connected to the other air inlet hole 222. In order to improve the sealing performance of the end cap 22, a sealing ring may be disposed between the outer surface of the branch pipe 31 and the hole wall of the air inlet hole 222. A seal ring is provided between the outer surface of the probe rod 11 and the wall of the rod hole 221. The sealing ring is arranged, and has the advantages that: preventing gas entering the sleeve 20 from exiting the end cap 22 reduces the force with which the gas blows against the probe 11.

The blowing assembly comprises a compressed air storage tank 50, an air inlet of the air pipe 30 is communicated with an air outlet of the compressed air storage tank 50, and the sleeve 20 is provided with ash removing gas through the compressed air storage tank 50. The compressed air storage tank 50 has an advantage of convenient transportation.

In another embodiment, the air supply isolation door 40 is replaced by a solenoid valve, and the level measuring system further comprises a controller, which may be a PLC controller or a DCS, which is a distributed control system. The embodiment can set a purging period through the controller, when the purging time is reached, the controller automatically sends an instruction of opening the electromagnetic valve, the air pipe 30 provides ash removing gas into the sleeve 20, intelligent control is achieved, and manual operation is not needed.

The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, no longer describe here.

The above description is only an example of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. The material level measuring system is characterized by comprising a material level meter assembly, a sleeve (20) and a blowing assembly, wherein the material level meter assembly comprises a probe rod (11), and the probe rod (11) is in sleeve fit with the sleeve (20); the sleeve (20) is provided with an opening (21), and an air outlet of the air blowing assembly is communicated with an inner cavity of the sleeve (20).

2. The level measuring system according to claim 1, wherein one end of the sleeve (20) has an open mouth (21) and the other end of the sleeve (20) is a closed end.

3. The material level measuring system according to claim 1, wherein one end of the sleeve (20) is provided with an opening (21), the other end of the sleeve (20) is provided with an end cover (22), the end cover (22) is provided with a rod hole (221) and an air inlet hole (222), the probe rod (11) penetrates through the rod hole (221) and is sleeved in the sleeve (20), and the air outlet end of the air blowing assembly is connected with the air inlet hole (222).

4. The fill level measuring system of claim 3, wherein the insufflation assembly comprises an air tube (30), an air outlet end of the air tube (30) being connected to the air inlet hole (222).

5. The level measuring system according to claim 4, further comprising an air supply isolation gate (40), the air supply isolation gate (40) being arranged on the air pipe (30).

6. The fill level measuring system according to claim 4, further comprising a controller and a solenoid valve, said solenoid valve being arranged on said air tube (30).

7. The level measuring system according to claim 1, wherein a portion of the probe rod (11) extends from the opening (21) to outside the sleeve (20).

8. The level measuring system according to claim 3, wherein the centre line of the rod bore (221) is collinear with the axis of the bushing (20).

9. The fill level measuring system of claim 3, wherein the number of said air intake holes (222) is at least two, at least two of said air intake holes (222) being evenly distributed in the circumferential direction around the periphery of said rod hole (221).

10. The fill level measuring system of claim 1, wherein the blow-in assembly comprises a compressed air storage tank (50).