CN106226120A - A kind of automatically rotate sampling apparatus for as-fired coal - Google Patents

Abstract

The invention discloses an automatic rotary sampling device for furnace coal, which belongs to the technical field of furnace coal sampling. The automatic rotary sampling device for furnace coal is composed of a sampling spoon, an elastic seal, an operating rod and an electric push rod. The electric push rod controls the stroke of the push rod to realize the rotary motion of the sampling spoon driven by the operating rod to complete the automatic sampling of the furnace coal. The electric push rod is controlled by an adjustable limit switch to achieve precise displacement control. The sealing surface of the elastic seal is an arc surface, which closely fits the sealing plate at the bottom of the sampling spoon, effectively preventing the pulverized coal in the coal falling pipe from leaking into the sampling silo. The invention can realize the automatic sampling of coal into the furnace. By using the electric push rod as the control device of the sampling spoon, the overall structure is novel in design, small in size and high in precision, and provides a good solution for improving the stability of the automatic sampling of coal into the furnace. technical reference.

Description

An automatic rotary sampling device for furnace coal

technical field

The invention relates to a furnace coal sampling device, in particular to an automatic rotary sampling device for furnace coal.

technical background

Coal consumption for power supply is the main economic indicator of a thermal power plant. Due to the lack of effective measurement of the amount of coal fed into the furnace, the traditional calculation of coal consumption for power supply and power supply generally uses reverse balance to calculate coal consumption, and the coal consumption calculated according to reverse balance cannot accurately reflect the operating status of the unit. and the economic efficiency of the whole plant. In order to control the cost of power generation and truly reflect the level of coal consumption, the state stipulates that the coal consumption must be calculated in a positive balance, and the sampling of coal entering the furnace is required to truly reflect the quality of the coal entering the furnace. Positive balance calculation of coal consumption mainly depends on power generation, coal weight measured by belt scales, and calorific value of furnace coal sampling and testing. At present, the power generation is read by the electric meter with high accuracy; the coal weight measurement error of the belt scale is also within the allowable range.

Existing coal sampling devices mostly adopt mechanical sampling devices. The sampling device is set in the middle of the conveyor belt. During the operation of the belt, the sampling head regularly scrapes the coal from the belt and enters the shrinkage equipment. The excess coal samples are lifted by the bucket elevator. Back to the transport belt. However, the depth of the sampling head is not easy to control. If it is too deep, it will damage the belt. If it is too shallow, the sampling will not be representative. Especially for the CFB unit, after the coal passes through the screening system, the coal is accumulated in layers on the conveyor belt, and the coal quality is quite different between the upper and lower layers. Moreover, the traditional mechanical sampling device also has the problem of bulky structure.

In order to solve the problems existing in the furnace coal sampling and metering device, the present invention proposes an automatic rotary sampling device for furnace coal, by setting a sampling spoon with a rectangular parallelepiped groove at the coal drop pipe, and using an electric push rod Provide power to realize automatic and accurate sampling of coal entering the furnace in the coal falling pipe, with uniform sampling and strong representativeness. Due to the use of electric push rods, the overall sampling structure is simple and compact.

Contents of the invention

The object of the present invention is to provide a kind of automatic rotary sampling device for coal into the furnace, characterized in that, the automatic rotary sampling device for coal into the furnace consists of a coal drop pipe 1, a sampling spoon 2, a sampling bin 3, an elastic Seal 4, seal plate 5, hole boss 7, cover 8, wear-resistant block 9, end cover 13, operating rod 14, push rod transmission mechanism 15, bearing base 16, left and right bearings, packing seal assembly 18 Wherein, one side of the coal drop pipe 1 has a material intake port, and the sampling bin 3 is fixed on the outer wall of the lower end of the material intake port opened by the coal drop pipe 1 through bolts 6 on one side, and the casing 8 is fixed on the outer wall of the material intake port by the second bolt 6-2. The outer wall side of the upper end of the feeding port opened by the coal drop pipe 1; the other side of the sampling bin 3 and the other side of the casing 8 are connected by the first bolt 6-1; the wear-resistant protective block 9 is fixed on the coal drop by the third bolt 6-3 The inner wall side of the upper end of the material extraction opening opened by the pipe 1; the sealing plate 5 is located at the lower left end of the sampling spoon 2, and the elastic seal 4 is respectively fixed on the outer wall side of the lower end of the material extraction opening opened by the coal falling pipe 1 and the other side of the sampling bin 3 The perforated bosses 7 are all located inside the casing 8; the perforated bosses 7 are welded to the upper left end of the sampling spoon 2, and there is a certain length of discharge port left from the welding position to the leftmost end of the sampling spoon 2.

The elastic seal 4 includes a sealing strip 10, a T-shaped base 11, and a spring 12; the sealing surface at the upper part of the sealing strip 10 is an arc surface, and the arc surface fits with the arc surface at the lower part of the sealing plate 5, and the lower part of the sealing strip 10 is a cylinder , sleeved on the upper end of the spring 12; the spring 12 is nested in the T-shaped groove of the T-shaped base 11.

The sampling spoon 2 is a cuboid groove.

The operating rod 14 passing through the cylindrical body in the circular hole of the perforated boss 7, the operating rod 14 and the perforated boss 7 are fixed with a key; the two ends of the perforating rod 14 pass through the right bearing 17-1 and the left bearing 17 respectively; The right bearing 17-1 and the left bearing 17 are respectively fixed on both sides of the outer casing 8 through the bearing base 16; a packing seal assembly 18 is arranged between the operating rod 14 and the casing 8;

The outsides of the left bearing 17 and the right bearing 17-1 are respectively equipped with end caps 13, and the end caps 13 are fixed on the casing 8 by the fourth bolt 6-4 and the fifth bolt 6-5;

The push rod transmission mechanism 15 includes a fixed base 19, an electric push rod 20, and a driving handle 21; the electric push rod 20 is equipped with an adjustable limit switch; the lower end of the electric push rod 20 is hinged on the fixed base 19; The upper end of the rod 20 is hinged with the left end of the driving handle 21; the right end of the driving connecting handle 21 has a round hole, and the operating rod 14 is nested in the driving connecting handle 21 right end round hole and fixed by a key.

The beneficial effects of the present invention are: the electric push rod of the automatic rotary sampling device for coal into the furnace drives the operating rod fixed on the driving handle to rotate through the hinge mechanism, so that the sampling spoon can rotate in the coal drop pipe to complete the sampling action . By setting the elastic sealing strip, it can effectively prevent the pulverized coal in the coal falling pipe from leaking into the sampling silo when not sampling. The electric push rod is equipped with an adjustable limit switch to realize high-precision control of the sampling action. It provides a technical reference for solving the automation and simplification of the coal sampling mechanical device.

Description of drawings

Figure 1 is a schematic diagram of the automatic rotary sampling device used for coal into the furnace.

Fig. 2 is a schematic diagram of taking out coal samples by an automatic rotary sampling device for coal entering the furnace.

Figure 3 is a sectional view of the elastic seal along the sealing arc.

Fig. 4 is a left side view of Fig. 1 .

Fig. 5 is a schematic diagram of the action of the push rod transmission mechanism and the sampling spoon.

Fig. 6 is the A-A view of Fig. 1 .

detailed description

The present invention provides an automatic rotary sampling device for furnace coal. The present invention will be further described below in conjunction with the accompanying drawings.

In the automatic rotary sampling device for coal into the furnace shown in Figure 1, the automatic rotary sampling device for coal into the furnace consists of a coal drop pipe 1, a sampling spoon 2, a sampling bin 3, an elastic seal 4, a sealing Plate 5, hole boss 7, cover 8, wear-resistant block 9, end cover 13, operating rod 14, push rod transmission mechanism 15, bearing base 16, left and right bearings, packing seal assembly 18; One side of the pipe 1 has a material intake opening, and one side of the sampling silo 3 is fixed on the outer wall side of the lower end of the material extraction opening opened by the coal falling pipe 1 through the bolt 6, and the cover 8 is fixed on the opening of the coal falling pipe 1 by the second bolt 6-2. The outer wall side of the upper end of the material intake port; the other side of the sampling silo 3 and the other side of the cover 8 are connected by the first bolt 6-1; the wear-resistant protective block 9 is fixed on the coal drop pipe 1 by the third bolt 6-3 for material extraction The inner wall side of the upper end of the mouth; the sealing plate 5 is located at the lower part of the left end of the sampling spoon 2, and the elastic seal 4 is respectively fixed on the outer wall side of the lower end of the feeding opening opened by the coal drop pipe 1 and the other side of the sampling bin 3; Located inside the casing 8; the perforated boss 7 is welded to the upper left end of the sampling spoon 2, and there is a certain length of discharge opening from the welding position to the leftmost end of the sampling spoon 2; the sampling spoon 2 is a cuboid groove (as shown in Figure 6 shown).

Fig. 3 shows the sectional view of the elastic seal along the sealing arc surface. The elastic seal 4 includes a sealing strip 10, a T-shaped base 11, and a spring 12; The arc surface fits, and the lower part of the sealing strip 10 is a cylinder, which is sleeved on the upper end of the spring 12; the spring 12 is nested in the T-shaped groove of the T-shaped base 11. When the sampling spoon 2 moves, the spring 12 can absorb the extrusion deformation of the sealing plate 5 to the sealing strip 10, so that the sealing strip 10 nested on the spring 12 is closely attached to the sealing plate 5 below the sampling spoon 2 to avoid sampling. When the spoon 2 was in the position shown in Fig. 1 and Fig. 2, the pulverized coal in the coal drop pipe 1 leaked into the sampling bin 3.

Figure 4 shows the left side view of Figure 1. The operating rod 14 passing through the cylindrical body in the circular hole of the perforated boss 7, the operating rod 14 and the perforated boss 7 are fixed with a key; the two ends of the perforating rod 14 pass through the right bearing 17-1 and the left bearing 17 respectively; The right bearing 17-1 and the left bearing 17 are respectively fixed on both sides of the outer casing 8 through the bearing base 16; a packing seal assembly 18 is arranged between the operating rod 14 and the casing 8; the left bearing 17, the right bearing 17- 1 are installed with end caps 13 respectively, and the end caps 13 are fixed on the casing 8 by the fourth bolt 6-4 and the fifth bolt 6-5.

Fig. 5 is a schematic diagram of the action of the push rod transmission mechanism and the sampling spoon. The push rod transmission mechanism 15 includes a fixed base 19, an electric push rod 20, and a driving handle 21; the electric push rod 20 is equipped with an adjustable limit switch; the lower end of the electric push rod 20 is hinged on the fixed base 19; The upper end of the rod 20 is hinged with the left end of the driving handle 21; the right end of the driving connecting handle 21 has a round hole, and the operating rod 14 is nested in the driving connecting handle 21 right end round hole and fixed by a key. The electric push rod 20 is equipped with an adjustable limit switch, which can accurately control the push rod movement position of the electric push rod 20; when the sampling spoon 2 is at the position shown in Figure 2, the push rod of the electric push rod 20 is in a fully retracted state; When the push rod of the rod 20 is pushed out, the driving handle 21 drives the operating rod 14 to rotate clockwise. When the sampling spoon 2 moves to the position shown in FIG. 1 , the push rod of the electric push rod 20 is fully extended. The electric push rod 20 can realize the acceleration rotation of the sampling spoon 2 from the position shown in FIG. 1 to the position shown in FIG.

As shown in Fig. 1, Fig. 2 and Fig. 4, during the coal sampling action, the coal powder in the coal drop pipe 1 falls into the sampling spoon 2, and the operating rod 14 rotates under the drive of the push rod transmission mechanism 15, and then Drive the sampling spoon 2 fixed in the middle of the operating rod 14 to rotate counterclockwise. At the same time, the coal sample in the sampling spoon 2 slides down the sampling spoon 2 under its own gravity, and finally slides through the discharge port at the left end of the sampling spoon 2. into the sampling bin 3. When the sampling spoon 2 arrived at the position shown in Figure 2, the push rod transmission mechanism 15 stopped moving; The hour hand rotates, and when the sampling spoon 2 moves to the position shown in Figure 1, the push rod transmission mechanism 15 stops and enters the next sampling process.

Claims (5)

1. An automatic rotary sampling device for coal into the furnace, characterized in that, the automatic rotary sampling device for coal into the furnace consists of a coal drop pipe (1), a sampling spoon (2), a sampling bin (3) , elastic seal (4), sealing plate (5), hole boss (7), cover (8), wear-resistant block (9), end cover (13), operating rod (14), push rod The transmission mechanism (15), the bearing base (16), the left and right bearings, and the packing seal assembly (18); among them, the coal drop pipe (1) has a material intake port on one side, and the sampling bin (3) passes through the bolt (6) It is fixed on the outer wall side of the lower end of the material intake opening opened by the coal falling pipe (1), and the cover (8) is fixed on the outer wall side of the upper end of the material extraction opening opened by the coal falling pipe (1) through the second bolt (6-2); the sampling material The other side of the warehouse (3) and the other side of the cover (8) are connected by the first bolt (6-1); the wear-resistant block (9) is fixed to the coal drop pipe (1) by the third bolt Open the inner wall side of the upper end of the sampling port; the sealing plate (5) is located at the lower left end of the sampling spoon (2), and the sealing plate (5) and the sampling spoon (2) are connected to the sampling bin (3) through the elastic seal (4) The other side is fixed to the outer wall side of the lower end of the opening of the coal drop pipe (1); the hole bosses (7) are all located inside the casing (8); the hole bosses (7) are welded to the bottom of the sampling spoon (2) The upper part of the left end, and there is a discharge opening with a certain length from the welding position to the leftmost end of the sampling spoon (2). 2. A kind of automatic rotary sampling device for furnace coal according to claim 1, characterized in that, the elastic seal (4) comprises a sealing strip (10), a T-shaped base (11), a spring ( 12); the upper sealing surface of the sealing strip (10) is an arc surface, and the arc surface fits with the lower arc surface of the sealing plate (5), and the lower part of the sealing strip (10) is a cylinder, which is sleeved on the upper end of the spring (12); the spring (12) is nested in the T-shaped groove of T-shaped base (11). 3. An automatic rotary sampling device for furnace coal according to claim 1, characterized in that the sampling spoon (2) is a rectangular parallelepiped groove. 4. A kind of automatic rotary sampling device for furnace coal according to claim 1, characterized in that, the operating rod (14) passing through the cylinder in the round hole of the perforated boss (7) operates Bar (14) and hole boss (7) use key to fix; Operating bar (14) two ends pass right bearing (17-1) and left bearing (17) respectively; Right bearing (17-1) and left bearing ( 17) The bearing bases (16) are respectively fixed on both sides of the outer casing (8); a packing seal assembly (18) is provided between the operating rod (14) and the casing (8); the left bearing (17) , the outside of right bearing (17-1) end cover (13) is installed respectively, and end cover (13) is fixed on the casing (8) by the 4th bolt (6-4), the 5th bolt (6-5). 5. An automatic rotary sampling device for furnace coal according to claim 1, characterized in that the push rod transmission mechanism (15) includes a fixed base (19), an electric push rod (20), a drive The connecting handle (21); the electric push rod (20) is equipped with an adjustable limit switch; the lower end of the electric push rod (20) is hinged on the fixed base (19); the upper end of the electric push rod (20) is connected to the drive connecting handle (21 ) is hinged at the left end; the drive connecting handle (21) right end has a circular hole, and the operating rod (14) is nested in the driving connecting handle (21) right end circular hole and is fixed by a key.