Position sensing device for steam soot blower

Abstract

The utility model discloses a position sensing device for a steam soot blower, which relates to the technical field of steam soot blowers and comprises a boiler body, a soot blowing main pipe and a soot blowing distance adjusting mechanism. The ultrasonic ranging probe is mounted on the steam soot blower, the soot blowing branch pipe facing the ultrasonic ranging probe is mounted on the soot blowing main pipe, and when the steam soot blower blows soot towards the boiler wall, high-temperature and high-pressure steam can be sprayed out of the soot blowing branch pipe to blow off dust on the ultrasonic ranging probe, so that the situation that too much dust is accumulated on the ultrasonic ranging probe to affect the accuracy of ranging can be avoided; the position sensing accuracy of the steam soot blower is improved, the guide pipe and the soot blowing main pipe are connected in a T shape through the three-way pipe, in this way, 360-degree soot blowing on the boiler wall can be achieved only by driving the soot blowing pipe to rotate by 180 degrees through the second motor, and the situation that due to the fact that the rotation angle of the blowing pipe is too large, an external connecting wire of an ultrasonic ranging probe is wound can be avoided; the use safety of the device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of steam soot blowers, in particular to a position sensing device for steam soot blowers. Background Art

[0002] Steam dust collector (steam soot blower) is an energy-saving device that must be equipped with thermal power plant boilers and boilers in other industries to remove dust from the boiler heating surface to improve the thermal efficiency of the boiler. During the soot blowing process of the existing steam soot blower, the soot blowing pipe moves linearly under the action of the transmission mechanism, and the soot blowing pipe passes through the boiler furnace wall to blow soot. Since the soot blowing is carried out in the boiler, and the thickness of the soot accumulation in the boiler is often difficult to directly judge, if the soot accumulation is too thick, the soot blowing pipe is easy to collide with the soot accumulation area. If the soot accumulation is too thin, the soot blowing pipe is far away from the soot accumulation position, and the ideal soot blowing effect cannot be achieved.

[0003] After searching, patent authorization announcement number CN 217560604 U discloses a position sensing device for a steam soot blower, which records "including a distance measuring sensor and a sensing mechanism connected to the soot blowing pipe of the steam soot blower, the sensing mechanism including a base plate, a sliding frame connected to the soot blowing pipe is slidably arranged on the base plate, a first pulley and a second pulley are rotatably arranged on the base plate, a synchronous belt is connected between the first pulley and the second pulley, the synchronous belt is fixedly connected to the sliding frame, and the first pulley is connected to an angle sensor for sensing the rotation angle of the first pulley". During use, we found that the distance measuring sensor in the above device is located in the boiler, and the end of the distance measuring sensor is easily affected by the soot blowing of the steam soot blower and dust falls off. When too much dust accumulates on the distance measuring sensor, it will affect the accuracy of the distance measuring sensor, resulting in a larger distance measurement error, and thus making the position sensing less accurate. Utility Model Content

[0004] The purpose of the utility model is to provide a position sensing device for a steam soot blower to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A position sensing device for a steam sootblower, comprising a boiler furnace body, a sootblowing main pipe and a sootblowing spacing adjustment mechanism, wherein a sliding sleeve is embeddedly installed on the boiler furnace body, a guide tube is arranged through the middle of the sliding sleeve, a tee is installed at one end of the guide tube located in the boiler furnace body, and sootblowing main pipes are installed on the other two ends of the tee, nozzles are installed on the sootblowing main pipes at equal intervals, an angle steel is installed at the top of the sootblowing main pipe, an ultrasonic ranging probe is installed on the angle steel, a sootblowing branch pipe is installed on one side of the top of the sootblowing main pipe, and the sootblowing branch pipe is arranged toward the front end of the ultrasonic ranging probe, a sootblowing spacing adjustment mechanism is installed on the outer wall of the boiler furnace body, a fixing plate is installed at the bottom of the sootblowing spacing adjustment mechanism, a bearing is embeddedly installed on the fixing plate, the guide tube passes through the bearing and is rotatably connected to the bearing, a second motor is installed on the outer wall of the fixing plate, a pinion is installed on the output shaft of the second motor, and the pinion meshes with a large gear installed on the guide tube.

[0007] As a further solution of the utility model: the sootblowing spacing adjustment mechanism includes a screw seat, a screw, a slider, a first motor and a screw bearing, a threaded connector is installed on the screw seat, the screw seat is fixedly connected to the boiler furnace body through the threaded connector, a screw is arranged at the bottom of the screw seat, one end of the screw is directly connected to the output shaft of the first motor installed on the screw seat, the other end of the screw is rotatably connected to the screw bearing installed on the screw seat, a slider is installed on the screw nut of the screw, and the fixed plate is installed at the bottom of the slider.

[0008] As a further solution of the utility model: a guide rail is installed on the bottom surface of the screw seat, and a guide groove that slides with the guide rail is opened on the slider.

[0009] As a further solution of the utility model: the threaded connection piece includes a screw and a nut, and the nut is matched with the screw thread.

[0010] As a further solution of the utility model: a rotary joint is installed at one end of the conduit outside the boiler body, and the conduit is connected to a steam delivery pipe through the rotary joint.

[0011] As a further solution of the utility model: the distance between the ultrasonic ranging probe and the inner wall of the boiler furnace is equal to the distance between the nozzle and the inner wall of the boiler furnace.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model installs an ultrasonic ranging probe on the top of a sootblowing main pipe, and installs a sootblowing branch pipe facing the ultrasonic ranging probe on the sootblowing main pipe. When the steam sootblower blows soot toward the boiler furnace wall, high-temperature and high-pressure steam will also be ejected from the sootblowing branch pipe to blow away the dust on the ultrasonic ranging probe. In this way, excessive dust accumulation on the ultrasonic ranging probe can be avoided to affect the accuracy of ranging, and the position sensing accuracy of the steam sootblower can be improved.

[0014] 2. The utility model sets a three-way pipe to connect the conduit and the sootblowing main pipe in a T-shape, so that the sootblowing of the boiler furnace wall can be realized by only driving the sootblowing pipe 180° rotation by the second motor, which can avoid the entanglement of the external wiring of the ultrasonic ranging probe due to excessive rotation angle of the sootblowing pipe, thereby ensuring the safe use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is an overall structural installation diagram of a position sensing device for a steam soot blower.

[0016] Figure 2 A position sensing device for a steam soot blower Figure 1 Side section of the middle sootblowing spacing adjustment mechanism.

[0017] Figure 3 A position sensing device for a steam soot blower Figure 1 A magnified view of the structure at center.

[0018] 1. Boiler body; 2. Sliding sleeve; 3. Conduit; 4. Tee pipe; 5. Sootblowing main pipe; 6. Nozzle; 7. Sootblowing spacing adjustment mechanism; 701. Screw seat; 702. Screw; 703. Sliding block; 704. First motor; 705. Screw bearing; 706. Guide rail; 8. Fixed plate; 9. Second motor; 10. Pinion; 11. Gear; 12. Threaded connector; 13. Bearing; 14. Rotary joint; 15. Steam delivery pipe; 16. Angle steel; 17. Ultrasonic ranging probe; 18. Sootblowing branch pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3In an embodiment of the utility model, a position sensing device for a steam sootblower comprises a boiler body 1, a sootblowing main pipe 5 and a sootblowing spacing adjustment mechanism 7. A sliding sleeve 2 is embeddedly installed on the boiler body 1, a guide tube 3 is arranged through the middle of the sliding sleeve 2, a tee pipe 4 is installed at one end of the guide tube 3 located in the boiler body 1, and a sootblowing main pipe 5 is installed on the other two ends of the tee pipe 4. Nozzles 6 are installed on the sootblowing main pipe 5 at equal intervals, an angle steel 16 is installed at the top of the sootblowing main pipe 5, an ultrasonic distance measuring probe 17 is installed on the angle steel 16, a sootblowing branch pipe 18 is installed on one side of the top of the sootblowing main pipe 5, and the sootblowing branch pipe 18 faces the ultrasonic distance measuring probe 17. The front end head is set, a soot blowing distance adjustment mechanism 7 is installed on the outer wall of the boiler furnace body 1, a fixed plate 8 is installed at the bottom of the soot blowing distance adjustment mechanism 7, a bearing 13 is embedded on the fixed plate 8, the conduit 3 passes through the bearing 13 and is rotatably connected with the bearing 13, a second motor 9 is installed on the outer wall of the fixed plate 8, a small gear 10 is installed on the output shaft of the second motor 9, the small gear 10 is meshed with a large gear 11 installed on the conduit 3, the distance between the ultrasonic ranging probe 17 and the inner wall of the boiler furnace body 1 is equal to the distance between the nozzle 6 and the inner wall of the boiler furnace body 1, so that the ultrasonic ranging probe 17 can directly measure the distance between the nozzle 6 and the ash accumulation.

[0021] See also Figure 1-2 The soot blowing spacing adjustment mechanism 7 includes a screw seat 701, a screw 702, a slider 703, a first motor 704 and a screw bearing 705. A threaded connector 12 is installed on the screw seat 701. The threaded connector 12 includes a screw and a nut, and the nut is matched with the screw thread. The screw seat 701 is fixedly connected to the boiler furnace body 1 through the threaded connector 12. A screw 702 is arranged at the bottom of the screw seat 701. One end of the screw 702 is directly connected to the output shaft of the first motor 704 installed on the screw seat 701, and the other end of the screw 702 is rotatably connected to the screw bearing 705 installed on the screw seat 701. A slider 703 is installed on the screw nut of the screw rod 702, the fixing plate 8 is installed at the bottom of the slider 703, and a guide rail 706 is installed on the bottom surface of the screw rod seat 701. A guide groove that slides with the guide rail 706 is opened on the slider 703. The setting of the guide rail 706 can make the slider 703 move more smoothly. The working principle of the sootblowing spacing adjustment mechanism 7 is that the first motor 704 drives the screw rod 702 to rotate, and the screw rod 702 drives the slider 703 to slide forward or backward along the guide rail 706. The slider 703 drives the guide tube 3 to move forward or backward relative to the boiler through the fixing plate 8, thereby realizing the adjustment of the sootblowing spacing.

[0022] See also Figure 1 A rotary joint 14 is installed at one end of the conduit 3 outside the boiler furnace body 1. The conduit 3 is connected to a steam delivery pipe 15 through the rotary joint 14. The setting of the rotary joint 14 allows the conduit 3 to rotate relative to the steam delivery pipe 15, which is convenient for soot blowing.

[0023] It should be noted that the ultrasonic ranging probe 17 is an existing mature product and will not be described in detail here. The ultrasonic ranging probe 17, the first motor 704 and the second motor 9 are all externally connected to a controller. The controller controls the first motor 704 and the second motor 9 to operate according to the feedback information of the ultrasonic ranging probe 17, so as to realize soot blowing on the furnace wall and adjust the soot blowing interval. The utility model is suitable for use in boilers with rectangular furnace walls. The second motor 9 is a forward / reverse switch. The second motor 9 rotates 180° clockwise or counterclockwise at a time under the control of an external controller. This can prevent the soot blowing main pipe 5 from rotating too much, causing the external wiring harness of the ultrasonic ranging probe 17 to be entangled.

[0024] The working principle of the utility model is:

[0025] When in use, the ultrasonic ranging probe 17 first detects the distance from the nozzle 6 to the ash accumulation location of the boiler furnace body 1, and the detection result is transmitted to the external controller through the external wiring. The external controller compares it with the preset soot blowing distance value. When the detection value is less than or greater than the preset soot blowing distance value, the external controller will control the soot blowing distance adjustment mechanism 7 to start, and the soot blowing distance adjustment mechanism 7 will drive the soot blowing main pipe 5 to move relative to the boiler furnace body 1 until the actual soot blowing distance value is equal to the preset soot blowing distance value, and then start the second motor 9, the second motor 9 drives the small gear 10 to rotate, the small gear 10 drives the conduit 3 to rotate by meshing with the large gear 11, and the conduit 3 drives the soot blowing main pipe 5 and the soot blowing branch pipe 18 to rotate 180° clockwise or counterclockwise, and the high-temperature and high-pressure steam introduced into the soot blowing main pipe 5 is used to blow away the ash on the furnace wall, and the soot blowing branch pipe 18 is used to blow away the ash on the ultrasonic ranging probe 17.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A position sensing device for a steam sootblower, comprising a boiler body (1), a sootblowing main pipe (5) and a sootblowing spacing adjustment mechanism (7), characterized in that: A sleeve (2) is embedded in the boiler furnace body (1), a guide tube (3) is provided through the middle of the sleeve (2), one end of the guide tube (3) located in the boiler furnace body (1) is provided with a tee pipe (4), the other two ends of the tee pipe (4) are provided with soot blowing main pipes (5), nozzles (6) are provided at equal intervals on the soot blowing main pipes (5), an angle steel (16) is provided at the top of the soot blowing main pipe (5), an ultrasonic distance measuring probe (17) is provided on the angle steel (16), a soot blowing branch pipe (18) is provided on one side of the top of the soot blowing main pipe (5), and the soot blowing branch pipe (18) is provided. ) is arranged toward the front end of the ultrasonic ranging probe (17), a soot blowing distance adjustment mechanism (7) is installed on the outer wall of the boiler furnace body (1), a fixing plate (8) is installed at the bottom of the soot blowing distance adjustment mechanism (7), a bearing (13) is embedded on the fixing plate (8), the conduit (3) passes through the bearing (13) and is rotatably connected to the bearing (13), a second motor (9) is installed on the outer wall of the fixing plate (8), a pinion (10) is installed on the output shaft of the second motor (9), and the pinion (10) is meshed with a large gear (11) installed on the conduit (3).

2. A position sensing device for a steam soot blower according to claim 1, characterized in that: The soot blowing spacing adjustment mechanism (7) comprises a screw seat (701), a screw (702), a slider (703), a first motor (704) and a screw bearing (705); a threaded connector (12) is mounted on the screw seat (701); the screw seat (701) is fixedly connected to the boiler body (1) via the threaded connector (12); a screw (702) is arranged at the bottom of the screw seat (701); one end of the screw (702) is directly connected to the output shaft of the first motor (704) mounted on the screw seat (701); the other end of the screw (702) is rotatably connected to the screw bearing (705) mounted on the screw seat (701); a slider (703) is mounted on the screw nut of the screw (702); and the fixing plate (8) is mounted at the bottom of the slider (703).

3. A position sensing device for a steam soot blower according to claim 2, characterized in that: A guide rail (706) is installed on the bottom surface of the screw rod seat (701), and a guide groove that slidably cooperates with the guide rail (706) is provided on the slider (703).

4. A position sensing device for a steam soot blower according to claim 2, characterized in that: The threaded connection piece (12) comprises a screw rod and a nut, and the nut is threadably matched with the screw rod.

5. A position sensing device for a steam soot blower according to claim 1, characterized in that: A rotary joint (14) is installed at one end of the conduit (3) located outside the boiler furnace body (1), and the conduit (3) is connected to a steam delivery pipe (15) via the rotary joint (14).

6. A position sensing device for a steam soot blower according to claim 1, characterized in that: The distance between the ultrasonic distance measuring probe (17) and the inner wall of the boiler furnace body (1) is equal to the distance between the nozzle (6) and the inner wall of the boiler furnace body (1).

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