A sampling device applied to the desulfurization limestone and gypsum cyclone stations in thermal power plants

Abstract

The present invention provides a sampling device applied to the desulfurization limestone and gypsum cyclone stations in thermal power plants, which includes an L-shaped bracket. The vertical rod of the L-shaped bracket is fixedly connected to a mounting plate fixed on the side wall of the feed box of the cyclone station. A cross bar is provided at the top of the L-shaped bracket, and the rod body of the cross bar extends outward from the feed box. A connecting rod mechanism is installed on the cross bar, and the lower end of the connecting rod mechanism is connected to a rotating mechanism that can rotate in the horizontal direction. A sampling tube is fixedly installed below the rotating mechanism. The sampling tube includes a material receiving port with an upward opening, an S-shaped elbow pipe, and a material taking port with a downward opening. In the present invention, the sampling tube for sampling is arranged outside the cyclone station, directly extracting the slurry from the cyclone, and not directly installed on the overflow pipe and underflow pipe of the cyclone station, which not only ensures the purity of the extracted slurry but also avoids punching holes in the overflow pipe and underflow pipe, causing no harm to the cyclone station.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary devices for cyclone stations, and more particularly to a sampling device applied to desulfurization limestone and gypsum cyclone stations in thermal power plants. Background Art

[0002] A cyclone station is a common separation and classification device that separates mixed slurries using the principle of centrifugal sedimentation. When the two-phase or multi-phase mixed slurry to be separated enters the feed box of the cyclone station from the feed inlet at a certain pressure, a strong three-dimensional elliptical strong rotational shear turbulent motion is generated. Due to the particle size difference between the coarse particles and the fine particles, the centrifugal force, centripetal buoyancy force, fluid drag force, etc. acting on them are different. Under the action of centrifugal sedimentation, most of the coarse particles are discharged through the bottom flow pipe at the lower part of the cyclone station, and most of the fine particles are discharged through the overflow pipe at the upper part of the cyclone station, thus achieving the purpose of separation and classification. To monitor the working state of the cyclone station and detect the effect of separating the mixed slurry, it is necessary to detect the separated slurry, which involves sampling.

[0003] Currently, sampling of desulfurization limestone and gypsum cyclone stations in thermal power plants is mainly achieved by installing sampling pipes 1 on the bottom flow pipe 14 and the overflow pipe 15 of the cyclone station. To cope with the wear of limestone and gypsum on the pipes, rubber lining or magnetic lining is added inside the pipes, which brings difficulties to the installation of the sampling pipe 1. Moreover, the lining layer at the installation position of the sampling pipe 1 is inevitably damaged, and it is very easy to expand the damaged surface and cause leakage after continuous impact by limestone or gypsum.

[0004] More critically, there are often multiple cyclones 9 on the cyclone station. For example, existing cyclone stations have 4, 6, 8, 10, etc. The slurries separated by each cyclone 9 are different. Sampling on the overflow pipe 15 or the bottom flow pipe 14 actually obtains a kind of mixed slurry, and it is impossible to properly obtain the slurry separated by each cyclone 9. If directly sampling with a sampling bottle at the elbow 9.2 of the cyclone or at the pipe orifice of the straight pipe 9.2 of the cyclone, although the obtained sample is the best, since the slurry coming out of the cyclone 9 is in a high-pressure and high-speed state, the slurry is ejected from the pipe orifice of the cyclone 9, and a lot of air is doped in the slurry, and finally it will splash around, polluting the environment and having a poor sampling effect.

[0005] In summary, how to accurately sample from the elbow 9.2 and the straight pipe 9.1 of the cyclone safely and environmentally friendly is a difficult problem currently faced in limestone and gypsum cyclone stations. Summary of the Invention

[0006] In view of this, the present invention provides a sampling device applied to a desulfurization limestone and gypsum cyclone station in a thermal power plant. The device realizes that a sampling tube can move and rotate to the vicinity of the cyclone to be sampled by installing a link mechanism that can move up, down, left, and right on an L-shaped bracket, and then installing a rotating mechanism that can rotate in the horizontal direction at the lower end of the link mechanism. The S-shaped sampling tube is installed at the lower end of the rotating mechanism, and the L-shaped bracket is fixed on the mounting plate welded on the outer side of the wall of the feed box of the cyclone station through the vertical rod on it. The S-shaped sampling tube unloads most of the pressure of the slurry ejected from the cyclone, enabling the slurry to slowly flow out at the material taking port.

[0007] The technical means adopted by the present invention are as follows: A sampling device applied to a desulfurization limestone and gypsum cyclone station in a thermal power plant, characterized in that it includes an L-shaped bracket, and the vertical rod of the L-shaped bracket is fixedly connected to the mounting plate fixed on the side wall of the feed box of the cyclone station; a cross bar is provided at the top of the L-shaped bracket, and the rod body of the cross bar extends towards the outside of the feed box. A link mechanism is installed on the cross bar, and a rotating mechanism that can rotate in the horizontal direction is connected to the lower end of the link mechanism; a sampling tube is fixedly installed below the rotating mechanism, and the sampling tube includes a material receiving port with an upward opening, an S-shaped bend pipe, and a material taking port with a downward opening.

[0008] Further, the link mechanism includes a second steel pipe installed on the cross bar. A vertical rod is fixedly connected to the lower end surface of the second steel pipe. A first steel pipe is installed on the vertical rod. A hinge seat is fixedly installed on the side of the first steel pipe close to the vertical rod and below the end of the cross bar close to the vertical rod; a connecting rod is hinged between the two hinge seats; a connecting shaft is fixed on the lower end surface of the first steel pipe, and the lower end of the connecting shaft is connected to the rotating mechanism.

[0009] Further, the rotating mechanism includes a bearing seat, a bearing is installed in the bearing seat, the lower part of the connecting shaft is installed and fixed in the bearing, and the lower end surface of the bearing seat is fixed on the sampling tube.

[0010] Further, the height of the material receiving port is lower than the height of the material taking port, and the height difference between the material receiving port and the material taking port is H, where H = 10 - 20 cm.

[0011] Further, the material receiving port is in the shape of a flared horn with a larger upper part and a smaller lower part.

[0012] Further, a baffle is fixed on the pipe orifice plane of the material taking port. The baffle semi-encloses the material taking port, and the included angle between the baffle and the horizontal direction is α, where α = 40° - 60°. The material taking port is made into an opening parallel to the horizontal plane.

[0013] Further, a set screw that can pass through the pipe wall is screwed on the side wall of the first steel pipe or the second steel pipe.

[0014] Further, a square base is welded to the bottom of the vertical rod, and a plurality of rib plates are welded between the base and the vertical rod. The base and the mounting plate are bolted together.

[0015] Further, a transition connecting plate is installed between the bearing seat and the sampling pipe. The bearing seat is fixed on the upper surface of the transition connecting plate, and an arc surface adapted to the pipe body of the sampling pipe is provided on the lower end surface of the transition connecting plate.

[0016] The present invention has the following advantages:

[0017] 1. In the present invention, the sampling pipe for sampling is arranged outside the cyclone station, directly extracting the slurry from the hydrocyclone, and not directly installed on the overflow pipe and underflow pipe of the cyclone station. This not only ensures the purity of the extracted slurry but also avoids punching holes in the overflow pipe and underflow pipe, causing no harm to the cyclone station.

[0018] 2. The design of the S-shaped sampling pipe enables most of the pressure of the high-pressure slurry ejected from the hydrocyclone to be unloaded when flowing in the sampling pipe. Moreover, the design of the semi-closed material taking port with baffles and the 40°-60° angle in the horizontal direction on the outer surface of the baffle enables the slurry to flow out of the material taking port more smoothly; the material taking port is made parallel to the horizontal plane, which is convenient for using a sampling bottle to collect the sample slurry.

[0019] 3. By installing a link mechanism on the cross bar of the L-shaped support rod and a rotating mechanism on the surface of the link mechanism, the sampling pipe can be moved up, down, left, right and perform a circumferential motion in the horizontal direction according to the position of the hydrocyclone, enabling the sampling pipe to reach the position closest to the hydrocyclone during sampling. At the same time, when not working, the sampling pipe can be retracted at the feed box, so as not to affect the normal operation of the cyclone station.

[0020] 4. The height of the material receiving port of the sampling pipe is 10-20 cm lower than the height of the material taking port, which can not only avoid a large amount of slurry remaining in the sampling pipe after sampling, but also make the liquid level height of the slurry at the material receiving port lower than that at the material taking port. The pressure of the slurry at the material taking port only comes from the part of the pressure that has not been completely unloaded after being ejected from the hydrocyclone. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the present invention.

[0023] Figure 2 is Figure 1 the top view of

[0024] Figure 3 is Figure 1 the front view of the hinge seat in

[0025] Figure 4 is Figure 3 the A-A sectional view in

[0026] Figure 5 is Figure 1 the side view of the transition connecting plate in

[0027] Figure 6 is the structural schematic diagram of the cyclone station.

[0028] In the figure: 1. Sampling pipe; 1.1. Material receiving port; 1.2. Material taking port; 1.3. Baffle; 2. Transition connecting plate; 2.1. Arc surface; 3. Rotating mechanism; 3.1. Bearing seat; 3.2. Bearing; 4. Connecting shaft; 5. Linkage mechanism; 5.1. Steel pipe one; 5.2. Screw; 5.3. Vertical rod; 5.4. Steel pipe two; 5.5. Hinge seat; 5.5.1. Groove; 5.5.2. Round hole; 5.6. Link; 5.7. Pin shaft; 6. L-shaped bracket; 6.1. Cross bar; 6.2. Vertical bar; 7. Rib plate; 8. Base; 9. Cyclone; 9.1. Straight pipe; 9.2. Elbow pipe; 10. Mounting plate; 11. Overflow port; 12. Feed box; 13. Feed pipe; 14. Underflow pipe; 15. Overflow pipe. Specific embodiments

[0029] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] A sampling device applied to a desulfurization limestone and gypsum cyclone station in a thermal power plant, including a mounting plate 10, as Figure 6 shown, the mounting plate 10 is welded and fixed on the side wall of the cyclone station feed box 12; on the upper surface of the mounting plate 10, an L-shaped bracket 6 as Figure 1 shown is fixedly installed. The vertical rod 6.2 of the L-shaped bracket 6 is fixedly connected to the mounting plate 10. To increase the stability of the connection between the vertical rod 6.2 and the mounting plate 10, a square base 8 can be welded at the bottom of the vertical rod 6.2, and four rib plates 7 that can enhance the connection strength are welded between the base 8 and the vertical rod 6.2. The base 8 and the mounting plate 10 are bolted together; at the top of the L-shaped bracket 6, there is a cross bar 6.1, and the rod body of the cross bar 6.1 extends outward from the box body of the feed box 12. A connecting rod mechanism 5 is installed on the rod body of the cross bar 6.1, and a rotating mechanism 3 is connected to the lower end of the connecting rod mechanism 5. The rotating mechanism 3 can perform a circular motion in the horizontal direction relative to the connecting rod mechanism 5; a sampling tube 1 is fixedly installed below the rotating mechanism 3. The sampling tube 1 includes a material receiving port 1.1 with an upward opening, an S-shaped bend pipe 9.2, and a material taking port 1.2 with a downward opening. The material receiving port 1.1 and the material taking port 1.2 form a through pipeline through the S-shaped bend pipe 9.2.

[0033] The connecting rod mechanism 5 includes a second steel pipe 5.4 sleeved on the cross bar 6.1. A vertical rod 5.3 is fixedly connected to the lower end surface of the second steel pipe 5.4. A first steel pipe 5.1 is sleeved on the vertical rod 5.3. On the side surface of the first steel pipe 5.1 close to the vertical rod 6.2 and below one end of the cross bar 6.1 close to the vertical rod 6.2, as Figure 3 , 4The hinge seat 5.5 shown in the figure; a groove 5.5.1 is provided on the hinge seat 5.5, and circular holes 5.5.2 are symmetrically provided on the two groove walls of the groove 5.5.1; two hinge seats 5.5 are connected by a connecting rod 5.6, and the end of the connecting rod 5.6 is installed in the groove 5.5.1, and the connecting rod 5.6 is movably installed in the groove 5.5.1 by passing a pin shaft 5.7 through the circular hole 5.5.2; a connecting shaft 4 is welded and fixed on the end face at the lower end of the first steel pipe 5.1; a set screw 5.2 is installed on the side wall of the first steel pipe 5.1, and when the set screw 5.2 is tightened, the first steel pipe 5.1 can be locked with the vertical rod 5.3, and then the whole connecting rod mechanism can be locked. When the set screw 5.2 is loosened and the first steel pipe 5.1 is moved upward, under the action of the connecting rod 5.6, the second steel pipe 5.4 moves away from the vertical rod 6.2 along the cross bar 6.1; the set screw 5.2 can also be installed on the second steel pipe 5.4, and the effect of locking the connecting rod mechanism 5 is the same as that of installing the set screw 5.2 on the first steel pipe 5.1; conversely, when the first steel pipe 5.1 is moved downward, the second steel pipe 5.4 moves toward the vertical rod 6.2 along the cross bar 6.1; the sampling pipe 1 moves along with the second steel pipe 5.4.

[0034] The rotation mechanism 3 described above includes a bearing seat 3.1, a rolling bearing 3.2 is installed in the bearing seat 3.1, the lower part of the connecting shaft 4 is inserted into the rolling bearing 3.2, and after the connecting shaft 4 passes through the rolling bearing 3.2, the rolling bearing 3.2 is fastened on the connecting shaft 4 with a bearing retaining ring to prevent the rolling bearing 3.2 from falling off, and the lower end face of the bearing seat 3.1 is fixed on the pipe body of the sampling pipe 1.

[0035] When the sampling device is not working, the sampling pipe 1 is lowered to the lowest end, which is also the position closest to the vertical rod 6.2. At this time, the sampling pipe 1 is close to the feed box 12 of the cyclone station; when sampling is required on the cyclone station, the operator grabs the sampling pipe 1 and moves it upward and outward. When it reaches the appropriate position, the first steel pipe 5.1 and the vertical rod 5.3 are locked with the set screw 5.2, and then the sampling pipe 1 is rotated to the cyclone 9 closest to the required sampling point. The elbow 9.2 of the cyclone 9 is taken out from the overflow pipe or the straight pipe 9.1 from the underflow pipe 14, and the slurry is injected into the sampling pipe 1 through the material receiving port 1.1, and then the slurry is received with a sampling bottle at the material taking port 1.2.

[0036] As a preferred embodiment, the height of the material receiving port 1.1 is lower than the height of the material taking port 1.2, and the height difference between the material receiving port 1.1 and the material taking port 1.2 is H, H = 10 - 20 cm, and in this embodiment, H = 20 cm.

[0037] As a preferred embodiment, a transition connecting plate 2 is installed between the bearing seat 3.1 and the sampling pipe 1. The bearing seat 3.1 is fixed on the upper surface of the transition connecting plate 2. An arc surface 2.1 adapted to the pipe body of the sampling pipe 1 is provided on the lower end surface of the transition connecting plate 2. After the arc surface 2.1 is attached to the pipe body of the sampling pipe 1, the transition connecting plate 2 and the sampling pipe 1 are welded together.

[0038] As a preferred embodiment, a baffle 1.3 is fixed on the pipe orifice plane of the material taking port 1.2, and the baffle 1.3 semi-encloses the material taking port 1.2; meanwhile, the unenclosed part of the material taking port 1.2 is made into an opening parallel to the horizontal plane; the outer surface of the baffle 1.3 forms an angle α with the horizontal direction, α = 40° - 60°, and in this embodiment, α = 48°; when the slurry jets onto the material taking port 1.2, because the pipe of the material taking port 1.2 is inclined, the slurry will first collide with the baffle, and the collided slurry will flow back, mix with the subsequent slurry to further unload the pressure of the slurry, and at the same time, part of the air in the slurry will be squeezed out during the collision, reducing the air content of the slurry.

[0039] As a preferred embodiment, the material receiving port 1.1 is in the shape of a trumpet with a large upper part and a small lower part.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sampling device applied to the desulfurization limestone and gypsum cyclone stations in thermal power plants, characterized in that: It includes an L-shaped bracket, the vertical rod of the L-shaped bracket is fixedly connected to the mounting plate fixed on the side wall of the feed box of the cyclone station; a cross bar is provided at the top of the L-shaped bracket, the rod body of the cross bar extends outward from the feed box, and a connecting rod mechanism is installed on the cross bar. The lower end of the connecting rod mechanism is connected to a rotating mechanism that can rotate in the horizontal direction; a sampling tube is fixedly installed below the rotating mechanism. The connecting rod mechanism can drive the sampling tube to move up, down, left and right. The sampling tube includes a material receiving port with an upward opening, an S-shaped elbow pipe and a material taking port with a downward opening that are connected in sequence from head to tail; the height of the material receiving port is lower than that of the material taking port, and the height difference between the material receiving port and the material taking port is H, H = 10 - 20 cm; a baffle is fixed on the pipe orifice plane of the material taking port, the baffle semi-encloses the material taking port, and the included angle between the baffle and the horizontal direction is α, α = 40° - 60°. Both the material taking port and the material receiving port are made into openings parallel to the horizontal plane.

2. The sampling device applied to the desulfurization limestone and gypsum cyclone station in a thermal power plant according to claim 1, wherein: The connecting rod mechanism includes a second steel pipe installed on the cross bar. A vertical rod is fixedly connected to the lower end surface of the second steel pipe. A first steel pipe is installed on the vertical rod. Hinge seats are respectively fixedly installed on the side surface of the first steel pipe close to the vertical rod and the lower surface of the cross bar close to one end of the vertical rod; a connecting rod is hinged between the two hinge seats; a connecting shaft is fixed on the lower end surface of the first steel pipe, and the lower end of the connecting shaft is connected to the rotating mechanism.

3. The sampling device applied to the desulfurization limestone and gypsum cyclone stations in thermal power plants according to claim 2, characterized in that: The rotating mechanism includes a bearing seat, a bearing is installed in the bearing seat, the lower part of the connecting shaft is installed and fixed in the bearing, and the lower end surface of the bearing seat is fixed on the sampling tube.

4. The sampling device applied to the desulfurization limestone and gypsum cyclone station in a thermal power plant according to claim 1, characterized in that: The material receiving port is in the shape of a horn with a large upper part and a small lower part.

5. The sampling device applied to the desulfurization limestone and gypsum cyclone station in a thermal power plant according to claim 2, wherein: A set screw that can pass through the pipe wall is screwed on the side wall of the first steel pipe or the second steel pipe.

6. The sampling device applied to the desulfurization limestone and gypsum cyclone stations in thermal power plants according to claim 1, wherein: A square base is welded at the bottom of the vertical rod, and a plurality of rib plates are welded between the base and the vertical rod. The base and the mounting plate are bolted together.

7. The sampling device applied to the desulfurization limestone and gypsum cyclone station in a thermal power plant according to claim 3, wherein: A transition connecting plate is installed between the bearing seat and the sampling tube. The bearing seat is fixed on the upper surface of the transition connecting plate, and an arc surface adapted to the tube body of the sampling tube is provided on the lower end surface of the transition connecting plate.

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