Automatic water replenishing liquid level switch and automatic water replenishing device for submerged chain conveyor of grate furnace

Abstract

The utility model discloses an automatic water replenishing liquid level switch and an automatic water replenishing device for a submerged chain conveyor of a grate furnace, and relates to the technical field of submerged chain conveyors. The automatic water replenishing liquid level switch comprises a sleeve, a proximity switch is connected outside the sleeve, a connecting rod capable of moving in the axial direction of the sleeve is arranged in the sleeve, one end of the connecting rod is connected with an induction piece, and the other end of the connecting rod extends out of the sleeve and is connected with a floating ball. The connecting rod is connected with a limiting piece which is located between the floating ball and the sleeve and matched with the sleeve in a limiting mode, and when the limiting piece makes contact with the sleeve, the induction piece is located within the induction range of the proximity switch. The liquid level switch is used for automatically measuring the liquid level in the submerged chain conveyor, only the floating ball makes contact with the water surface in the submerged chain conveyor in the using process, the floating ball is not prone to being deposited and wrapped by silt, foam and other substances in the submerged chain conveyor, and therefore the liquid level measuring function of the liquid level switch can be prevented from being interfered by the silt, foam and other substances; and the accuracy and the reliability of liquid level measurement are further ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slag conveyer, in particular to a grate slag conveyer automatic water replenishing liquid level switch and automatic water replenishing device. BACKGROUND

[0002] The slag conveyer is a common slag removing equipment in waste incineration system, which is used for treating the ash produced after boiler combustion; since the ash has strong corrosiveness, in order to prevent the ash from polluting the environment again, the slag conveyer needs to be water sealed, and the ash produced after boiler combustion is mixed with water after entering the slag conveyer, so as to prevent the ash from dusting and emitting odor.

[0003] At present, the slag conveyer usually controls the automatic water replenishing valve through the full-function vibration tuning fork liquid level switch installed at the lower end of the swing arm on the side surface. However, since the water in the slag conveyer contains a lot of mud, foam and other substances, the tuning fork liquid level switch in the slag conveyer is easily deposited and wrapped by the mud, foam and other substances, so that the liquid level measurement function of the tuning fork liquid level switch is interfered, and the tuning fork liquid level switch often appears to still send water signal when lacking water or still send lack of water signal when full, which cannot truly reflect the liquid level in the slag conveyer. CONTENT OF THE INVENTION

[0004] The present application aims to provide a grate slag conveyer automatic water replenishing liquid level switch and automatic water replenishing device, which solves the problem that the liquid level measurement function of the tuning fork liquid level switch is easily interfered and cannot truly reflect the liquid level in the slag conveyer.

[0005] The technical solution adopted by the present application to solve the technical problem is:

[0006] In a first aspect, a grate slag conveyer automatic water replenishing liquid level switch is provided, which comprises a sleeve, a proximity switch is connected outside the sleeve, a connecting rod which can move along the axial direction of the sleeve is arranged in the sleeve, one end of the connecting rod is connected with a sensing piece, and the other end of the connecting rod extends to the outside of the sleeve and is connected with a floating ball.

[0007] A limiting piece is connected on the connecting rod, which is located between the floating ball and the sleeve and is limited with the sleeve, when the limiting piece contacts with the sleeve, the sensing piece is located in the sensing range of the proximity switch.

[0008] Further, the proximity switch comprises a magnetic proximity switch, and the sensing piece comprises a permanent magnet.

[0009] Further, the proximity switch is connected with the sleeve through a clamp.

[0010] Further, an installation seat is connected outside the sleeve.

[0011] Further, the mounting base comprises a flange sleeved on the sleeve and movable along the axial direction of the sleeve, and two fixing rings arranged on two sides of the flange and connected with the sleeve by screws.

[0012] Further, the sleeve is a transparent tube.

[0013] Further, a scale is arranged on the outer surface of the sleeve.

[0014] Further, a quick-inserting direct head is connected to one end of the sleeve towards the floating ball, and a quick-inserting plug is connected to the other end of the sleeve away from the floating ball.

[0015] Further, the floating ball is a stainless steel floating ball.

[0016] In a second aspect, an automatic water replenishing device for a furnace slag conveyor is provided, comprising a water replenishing valve, a water replenishing liquid level switch and a PLC controller, the water replenishing valve and the water replenishing liquid level switch are connected with the PLC controller, and the water replenishing liquid level switch is the automatic water replenishing liquid level switch for a furnace slag conveyor provided in the first aspect.

[0017] The application has the following beneficial effects:

[0018] The automatic water replenishing liquid level switch for a furnace slag conveyor provided in the application is used for automatically measuring the liquid level in the furnace slag conveyor, and utilizes the principle that the floating ball moves up and down with the liquid level according to the water surface buoyancy to reflect the change of the liquid level, the floating ball drives the inductive element to move up and down in the sleeve through the connecting rod, and then the inductive element and the proximity switch are matched to obtain the liquid level change signal; since only the floating ball is in contact with the water surface in the furnace slag conveyor during use, and the floating ball is not easy to be deposited and wrapped by the mud, foam and other substances in the furnace slag conveyor, the liquid level measuring function of the liquid level switch can be prevented from being interfered by the mud, foam and other substances, and the accuracy and reliability of the liquid level measurement are ensured, and the problem that the liquid level measuring function of the tuning fork liquid level switch is easily interfered and cannot truly reflect the liquid level in the furnace slag conveyor is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 is the structural intention of the automatic water replenishing liquid level switch for a furnace slag conveyor provided in the application;

[0021] Figure 2Fig. 1 is a schematic diagram of a hardware structure of a furnace slag conveyor automatic water replenishing device provided by an embodiment of the present application.

[0022] Reference signs:

[0023] 10 - sleeve;

[0024] 11 - proximity switch;

[0025] 12 - connecting rod;

[0026] 13 - inductor;

[0027] 14 - floating ball;

[0028] 15 - limiting member;

[0029] 16 - mounting seat;

[0030] 161 - flange;

[0031] 162 - fixing ring;

[0032] 163 - screw;

[0033] 17 - quick insertion direct head;

[0034] 18 - quick insertion plug;

[0035] 20 - water replenishing valve;

[0036] 30 - water replenishing liquid level switch;

[0037] 40 - PLC controller. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the description of the present application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified, the above orientation description can be flexibly set in the process of actual application, as long as the relative positional relationship shown in the drawings is met.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the prior art, the slag conveyor is often controlled by a full-function vibration tuning fork liquid level switch installed at the lower end of the swing arm on the side to automatically supplement the water valve. However, in the actual production process, the tuning fork liquid level switch often sends a water signal when there is no water or a lack of water signal when the water is full, resulting in the water valve being unable to automatically open and close the water supply according to the liquid level change in the automatic mode.

[0042] After observation and analysis, the tuning fork of the tuning fork liquid level switch is deposited and wrapped by mud, foam and other substances in the slag conveyor, causing the tuning fork liquid level switch to measure the liquid level function to be disturbed. After cleaning the attachments on the tuning fork, the function of the tuning fork liquid level switch can be restored.

[0043] However, due to factors such as high liquid temperature, more mud and foam in the slag conveyor, and inconvenient cleaning of the tuning fork position, the function of the tuning fork liquid level switch cannot be reliably realized, which will cause the following hazards: 1. The slag conveyor is out of water: a. It will cause the slag to be unable to cool down completely, and the dust will fly with the hot gas, affecting the surrounding environment; b. It is not conducive to the flow of slag in the slag conveyor, and it is easy to cause the slag to accumulate, and it may cause the slag conveyor to be blocked in severe cases. 2. The slag conveyor is full of water: a. The water content in the slag conveyor is too high, and the mud water is too dilute, which is also not conducive to the discharge of the slag; b. The mud blocks the overflow pipe, causing the mud water to enter the bearing of the slag conveyor, damaging the equipment; c. Mud water overflow, polluting the environment around the equipment and posing a safety risk.

[0044] Based on this, referring to Figure 1 The present application provides a slag conveyor for a grate furnace, which comprises a sleeve 10, a proximity switch 11 connected outside the sleeve 10, a connecting rod 12 movably arranged in the sleeve 10, an inductive element 13 connected to one end of the connecting rod 12, and a float ball 14 connected to the other end of the connecting rod 12 outside the sleeve 10; a limiting element 15 is connected to the connecting rod 12 between the float ball 14 and the sleeve 10 and is in limiting cooperation with the sleeve 10, and when the limiting element 15 is in contact with the sleeve 10, the inductive element 13 is located within the sensing range of the proximity switch 11.

[0045] The sleeve 10 is vertically arranged and has an open structure at both upper and lower ends, and is used to be fixed on a support outside the slag conveyor. For example, the sleeve 10 is made of a circular tube with an outer diameter of 20 mm, a wall thickness of 2 mm and a length of 1000 mm. The proximity switch 11 is arranged adjacent to the upper end of the sleeve 10 and is connected to the outer surface of the sleeve 10. For example, the proximity switch 11 is connected to the sleeve 10 by a clamp, so that the position of the proximity switch 11 on the sleeve 10 can be adjusted.

[0046] The connecting rod 12 is vertically arranged, the upper end of the connecting rod 12 is arranged in the sleeve 10, the lower end of the connecting rod 12 is arranged outside the sleeve 10, and the connecting rod 12 can move up and down relative to the sleeve 10. For example, the connecting rod 12 is made of a circular rod with a diameter of 8 mm.

[0047] The inductor 13 is arranged in the sleeve 10 and is connected to the upper end of the connecting rod 12, the inductor 13 can move up and down in the sleeve 10 and is used in cooperation with the proximity switch 11. For example, the inductor 13 is connected to the connecting rod 12 by a threaded structure. When the inductor 13 moves into the sensing range of the proximity switch 11, the proximity switch 11 outputs a first signal, which can represent a high liquid level signal; when the inductor 13 moves out of the sensing range of the proximity switch 11, the proximity switch 11 outputs a second signal, which can represent a low liquid level signal.

[0048] The float ball 14 is arranged outside the sleeve 10 and is connected to the lower end of the connecting rod 12, the float ball 14 is used to float on the water surface of the slag conveyor, and the change of the liquid level is reflected by the principle that the float ball 14 moves up and down with the change of the liquid level under the action of the water surface buoyancy. For example, the float ball 14 is a stainless steel float ball with an outer diameter of 100 mm, which is connected to the connecting rod 12 by a threaded structure.

[0049] The limiting piece 15 is arranged between the float ball 14 and the sleeve 10 and is connected to the connecting rod 12, the limiting piece 15 is used to limit the lower end of the sleeve 10 to control the maximum floating height of the float ball 14. Specifically, when the float ball 14 floats to the highest position, the limiting piece 15 contacts the lower end of the sleeve 10, at this time, the inductor 13 is just located in the sensing range of the proximity switch 11, indicating that the slag conveyor is in a high liquid level.

[0050] The furnace grate furnace slag conveyor automatic water replenishing liquid level switch provided by the embodiment of the application is used for automatically measuring the liquid level in the slag conveyor; in use, the sleeve 10 is vertically arranged and fixed on the support outside the slag conveyor, the lower end of the sleeve 10 is inserted into the slag conveyor, the float ball 14 is floated on the water surface in the slag conveyor, and the liquid level switch is adjusted to automatically and real-timely measure the liquid level in the slag conveyor. During the measurement, when the sensing part 13 is located in the sensing range of the proximity switch 11, the proximity switch 11 sends a first signal representing a high liquid level to the PLC controller, the PLC controller judges that the slag conveyor is not short of water after receiving the first signal, and at this time, it is not necessary to replenish water into the slag conveyor; along with the slagging work, the liquid level in the slag conveyor is lowered, the float ball 14 is lowered along with the liquid level and drives the sensing part 13 to move downwards through the connecting rod 12, when the sensing part 13 is moved downwards to below the sensing range of the proximity switch 11, the proximity switch 11 sends a second signal representing a low liquid level to the PLC controller, the PLC controller judges that the slag conveyor is short of water after receiving the second signal, and at this time, the PLC controller sends a water shortage signal to the water replenishing valve, and the water replenishing valve is automatically opened to replenish water into the slag conveyor until the water shortage signal disappears.

[0051] Compared with the existing tuning fork liquid level switch, the furnace grate furnace slag conveyor automatic water replenishing liquid level switch provided by the embodiment of the application is used for automatically measuring the liquid level in the slag conveyor; in use, the sleeve 10 is vertically arranged and fixed on the support outside the slag conveyor, the lower end of the sleeve 10 is inserted into the slag conveyor, the float ball 14 is floated on the water surface in the slag conveyor, and the liquid level switch is adjusted to automatically and real-timely measure the liquid level in the slag conveyor. During the measurement, when the sensing part 13 is located in the sensing range of the proximity switch 11, the proximity switch 11 sends a first signal representing a high liquid level to the PLC controller, the PLC controller judges that the slag conveyor is not short of water after receiving the first signal, and at this time, it is not necessary to replenish water into the slag conveyor; along with the slagging work, the liquid level in the slag conveyor is lowered, the float ball 14 is lowered along with the liquid level and drives the sensing part 13 to move downwards through the connecting rod 12, when the sensing part 13 is moved downwards to below the sensing range of the proximity switch 11, the proximity switch 11 sends a second signal representing a low liquid level to the PLC controller, the PLC controller judges that the slag conveyor is short of water after receiving the second signal, and at this time, the PLC controller sends a water shortage signal to the water replenishing valve, and the water replenishing valve is automatically opened to replenish water into the slag conveyor until the water shortage signal disappears.

[0052] In some embodiments, referring to Figure 1 , the proximity switch 11 comprises a magnetic proximity switch, and the sensing part 13 comprises a permanent magnet. The magnetic proximity switch can achieve the maximum detection distance with a small switch volume, can detect the permanent magnet, and trigger the switch signal output. For example, the magnetic proximity switch is a CS1-U normally closed magnetic proximity switch. When the permanent magnet moves into the sensing range of the normally closed magnetic proximity switch, the normally closed magnetic proximity switch outputs a signal; when the permanent magnet moves out of the sensing range of the normally closed magnetic proximity switch, the normally closed magnetic proximity switch outputs another signal, and the two different signals are used to judge whether the slag conveyor is short of water.

[0053] In some embodiments, referring to Figure 1 , the sleeve 10 is connected with a mounting seat 16. The mounting seat 16 is arranged to be connected with the support outside the slag conveyor to fix the sleeve 10. The mounting seat 16 can be a mounting plate.

[0054] For example, referring to Figure 1The mounting seat 16 includes a flange 161 sleeved on the sleeve pipe 10 and movable along the axial direction of the sleeve pipe 10, and two fixing rings 162 arranged on both sides of the flange 161 and connected with the sleeve pipe 10 by screws 163. The flange 161 is used to be connected with a support outside the slag conveyor.

[0055] Specifically, the flange 161 is a DN15 flange with an inner diameter of 20.5 mm; the fixing ring 162 has an inner diameter of 21 mm and an outer diameter of 35 mm, and an M5 threaded hole is arranged on the fixing ring 162 in the radial direction; and the screw 163 is an M5 screw. By screwing the screw 163 in the threaded hole of the fixing ring 162, the fixing ring 162 can be fixed on the sleeve pipe 10 after the screw 163 is tightened, and the upper and lower ends of the flange 161 are limited by the two fixing rings 162, so that the flange 161 is prevented from moving along the axial direction of the sleeve pipe 10.

[0056] The mounting seat 16 with the above structure can adjust the position of the flange 161 on the sleeve pipe 10 as needed, thereby adjusting the depth of the sleeve pipe 10 inserted into the slag conveyor and reducing the length of the connecting rod 12 extending out of the sleeve pipe 10, so that the connecting rod 12 is prevented from deviating when moving up and down due to being too long.

[0057] In some embodiments, referring to Figure 1 The sleeve pipe 10 is a transparent pipe. By setting the sleeve pipe 10 as a transparent pipe, the position of the inductor 13 in the sleeve pipe 10 can be observed. Specifically, the sleeve pipe 10 is an acrylic transparent pipe. Further, a scale line is arranged on the outer surface of the sleeve pipe 10. By cooperating the inductor 13 with the scale line, the liquid level height in the slag conveyor can be intuitively reflected.

[0058] In some embodiments, referring to Figure 1 The end of the sleeve pipe 10 close to the floating ball 14 is connected with a quick plug head 17, and the end of the sleeve pipe 10 away from the floating ball 14 is connected with a quick plug plug 18.

[0059] Specifically, the quick plug head 17 is connected to the lower end of the sleeve pipe 10, the connecting rod 12 passes through the quick plug head 17 and is movable up and down relative to the quick plug head 17, and the quick plug plug 18 is connected to the upper end of the sleeve pipe 10. By setting the quick plug head 17, the lower end of the sleeve pipe 10 can be quickly inserted into the slag conveyor; by setting the quick plug plug 18, the upper end of the sleeve pipe 10 is plugged to prevent dust and other impurities from entering the sleeve pipe 10.

[0060] Referring to Figure 2 The embodiment of the present application provides a furnace slag conveyor automatic water replenishing device, which comprises a water replenishing valve 20, a water replenishing liquid level switch 30 and a PLC controller 40. The water replenishing valve 20 and the water replenishing liquid level switch 30 are connected with the PLC controller 40, and the water replenishing liquid level switch 30 is a furnace slag conveyor automatic water replenishing liquid level switch.

[0061] The furnace grate furnace slag conveyor automatic water replenishing device provided by the embodiment of the application is used for automatically replenishing water into the slag conveyor. When in use, the water replenishing liquid level switch 30 is used to automatically and real-timely measure the liquid level in the slag conveyor. When the sensing element 13 is located in the sensing range of the proximity switch 11, the proximity switch 11 sends a first signal representing a high liquid level to the PLC controller 40. After receiving the first signal, the PLC controller 40 judges that the slag conveyor is not short of water. At this time, the PLC controller 40 sends a non-short-of-water signal to the water replenishing valve 20. After receiving the non-short-of-water signal, the water replenishing valve 20 is automatically closed to stop replenishing water into the slag conveyor. With the progress of the slagging work, the liquid level in the slag conveyor is lowered. The floating ball 14 is lowered along with the liquid level and drives the sensing element 13 to move downward in the sleeve 10 through the connecting rod 12. After the sensing element 13 is moved downward to below the sensing range of the proximity switch 11, the proximity switch 11 sends a second signal representing a low liquid level to the PLC controller 40. After receiving the second signal, the PLC controller 40 judges that the slag conveyor is short of water. At this time, the PLC controller 40 sends a short-of-water signal to the water replenishing valve 20. After receiving the short-of-water signal, the water replenishing valve 20 is automatically opened to replenish water into the slag conveyor until the short-of-water signal disappears.

[0062] The furnace grate furnace slag conveyor automatic water replenishing device provided by the embodiment of the application can prevent the liquid level measuring function of the water replenishing liquid level switch 30 from being interfered by mud, foam and other substances, thereby ensuring the accuracy and reliability of the liquid level measurement and solving the problem that the liquid level measuring function of the tuning fork liquid level switch is easily interfered and cannot truly reflect the liquid level in the slag conveyor.

[0063] The above is only the specific embodiment of the application, but the protection scope of the application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art within the technical range disclosed by the application should be covered in the protection scope of the application.

Claims

1. A stoker-fired boiler slag conveyor automatic water make-up level switch characterized by, The application relates to a water level automatic control device for a furnace slag conveyor, which comprises a sleeve (10) outside which a proximity switch (11) is connected, and inside which a connecting rod (12) is arranged and can move axially, one end of the connecting rod (12) is connected with a sensing part (13), and the other end of the connecting rod (12) extends outside the sleeve (10) and is connected with a floating ball (14). A limiting part (15) is connected on the connecting rod (12) and is located between the floating ball (14) and the sleeve (10) and is in limiting cooperation with the sleeve (10), when the limiting part (15) is in contact with the sleeve (10), the sensing part (13) is located in the sensing range of the proximity switch (11).

2. The stoker boiler dredge machine automatic water make-up level switch of claim 1 wherein, The proximity switch (11) is a magnetic proximity switch, and the sensing part (13) comprises a permanent magnet.

3. The grate stoker automatic water make-up level switch of claim 1 wherein, The proximity switch (11) is connected with the sleeve (10) through a clamp.

4. The grate stoker automatic water make-up level switch of claim 1 wherein, An installation base (16) is connected outside the sleeve (10).

5. The grate stoker automatic water make-up level switch of claim 4 wherein, The installation base (16) comprises a flange (161) and two fixing rings (162), the flange (161) is sleeved on the sleeve (10) and can move axially, the two fixing rings (162) are arranged on the two sides of the flange (161), and the fixing rings (162) are connected with the sleeve (10) through screws (163).

6. The grate stoker automatic water make-up level switch of claim 1 wherein, The sleeve (10) is a transparent tube.

7. The grate stoker automatic water make-up level switch of claim 6 wherein, Scale lines are arranged on the outer surface of the sleeve (10).

8. The grate stoker automatic water make-up level switch of claim 1 wherein, A quick-inserting direct head (17) is connected with one end of the sleeve (10) which is close to the floating ball (14), and a quick-inserting plug (18) is connected with the other end of the sleeve (10) which is far away from the floating ball (14).

9. The grate stoker automatic water make-up level switch of claim 1 wherein, The floating ball (14) is a stainless steel floating ball.

10. A furnace water supply device for a furnace slag conveyor, characterized by comprising: The application relates to a water level automatic control device for a furnace slag conveyor, which comprises a sleeve (10) outside which a proximity switch (11) is connected, and inside which a connecting rod (12) is arranged and can move axially, one end of the connecting rod (12) is connected with a sensing part (13), and the other end of the connecting rod (12) extends outside the sleeve (10) and is connected with a floating ball (14).

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