Special hydraulic coke breaking and jacking device for large-area coking and coke fluffy of dry bottom hopper of boiler of thermal power plant

Abstract

The hydraulic coke breaking jacking device comprises a base, a guide rod, a reversing valve and a top seat from bottom to top, the top seat is located over the base, the guide rod is vertically fixed between the base and the top seat, the reversing valve is vertically fixed to the center of the base, and the guide rod is vertically fixed to the center of the top seat. The guide rod is used for guiding the reversing valve; the top of the reversing valve is connected with a jacking rod sliding base, the left side and the right side of the jacking rod sliding base are slidably connected with the guide rods, and the reversing valve drives the jacking rod sliding base to move up and down when stretching out and drawing back. A vertical guide box is fixedly connected above the jacking rod sliding seat, penetrates through the top seat and is in sliding connection with the top seat; the top of the guide box is fixedly connected with a mandril; and the ejector rod is detachably connected with a coke breaking assembly or a crushing head assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler equipment in thermal power plants, and in particular relates to a hydraulic coke breaking and lifting device specially used for large-area coking and loose coke in a cold ash hopper of a thermal power plant boiler. Background Art

[0002] The boiler is one of the three main equipments (boiler, steam turbine, generator) of a thermal power plant. It uses combustibles (such as coal) as fuel, heats water to generate steam during combustion, and the steam drives the turbine to rotate. After the fuel is burned in the boiler, slag slurry will be produced, which will be discharged by the slag discharge system after cooling in the boiler cold ash hopper. If the boiler cold ash hopper is not designed properly or the slag discharge system fails for a long time, the cooled slag slurry will continue to accumulate, causing large-scale coking and coking in the boiler cold ash hopper; if it is not handled in time, the boiler will be forced to shut down, causing serious economic losses to the thermal power plant.

[0003] After the fuel is burned, the slag slurry is cooled in the boiler ash hopper and then becomes rock-hard. The hardness is extremely high. In addition, the working environment is harsh and the temperature is high, so workers cannot get close. Using pneumatic picks and pneumatic drills to drill holes is labor-intensive and has certain safety risks. The operation efficiency is low and it is impossible to operate for a long time because the coke rock is too hard. Local blasting is high-risk and damages the on-site equipment. Utility Model Content

[0004] The utility model provides a hydraulic coke breaking and lifting device for large-area coking and coking in the cold ash hopper of a thermal power plant boiler, so as to solve the problem that manual coke breaking is difficult and inefficient after large-area coking and coking in the cold ash hopper of a thermal power plant boiler.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A hydraulic coke breaking and lifting device for large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler, comprising a base, a guide rod, a reversing valve and a top seat from bottom to top, the top seat is located directly above the base, the guide rod is vertically fixed between the base and the top seat, the reversing valve is vertically fixed at the center of the base, and the guide rod is used to provide a guiding effect for the reversing valve;

[0007] A lifting rod slide is connected to the top of the reversing valve, and the left and right sides of the lifting rod slide are slidably connected to the guide rod. When the reversing valve is extended or retracted, the lifting rod slide is driven to move up and down;

[0008] A vertical guide box is fixedly connected above the lifting rod slide seat, and the guide box passes through the top seat and is slidably connected to the top seat; a top rod is fixedly connected to the top of the guide box; and a coke breaking assembly or a crushing head assembly is detachably connected to the top rod.

[0009] Furthermore, the coke breaking assembly comprises a vertical mandrel short section, the lower end of which is connected to the top end of the mandrel via a flange structure, and the top end of the mandrel is provided with a plurality of conical splitting heads.

[0010] Furthermore, the crushing head assembly includes a crushing head seat and a hydraulic crushing head, the lower end of the crushing head seat is connected to the top of the top rod through a flange structure, and the hydraulic crushing head is connected to the crushing head seat; the hammer rod of the hydraulic crushing head is vertically upward.

[0011] Furthermore, 9 Φ60mm conical splitters are designed on the top of the mandrel short section.

[0012] The beneficial effects of the utility model are:

[0013] The hydraulic coke-breaking and lifting device breaks the coke that has been cooled and lithified at the bottom of the furnace through hydraulic pressure. On the basis of ensuring the safety of operators, it greatly improves the efficiency of coke breaking and cleaning, and effectively solves the coke-breaking problem after large-scale coking and coke puffing in the cold ash hopper of the thermal power plant boiler, avoiding the loss of economic benefits caused by the forced shutdown of the boiler due to large-scale coking and coke puffing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the utility model with the coke breaking assembly installed;

[0015] Figure 2 This is the front view of the coke breaking assembly of the utility model;

[0016] Figure 3 This is the front view of the utility model with the crushing head assembly installed;

[0017] Figure 4 It is the front view and side view of the crushing head assembly of the utility model;

[0018] Figure 5 It is a schematic diagram of the hydraulic system of the utility model;

[0019] In the figure: 1 base, 2 guide rod, 3 reversing valve, 4 upper oil pipe interface, 5 pin shaft, 6 lifting rod slide seat, 7 top seat, 8 guide box, 9 top rod;

[0020] 10 crushing head seat, 11 connecting pin shaft, 12 crushing head, 13 foot, 14 guide rod lower nut, 15 shaft sleeve, 16 reversing valve bottom flange, 17 lower oil pipe joint, 18 guide sliding sleeve, 19 reversing valve top seat, 20 rib plate, 21 top seat shaft sleeve, 22 guide rod upper nut, 23 reinforcing rib plate, 24 slide rail, 25 top rod flange;

[0021] A1 push rod short section flange, A2 push rod short section, B1 hydraulic crushing head seat, A3 splitting head, B2 connecting pin, B3 1LGB68 hydraulic crushing head, B4 crushing head seat rib plate, B5 crushing head hydraulic oil pipe joint, B6 hammer rod, B7 crushing head seat flange, C hydraulic oil station hydraulic control circuit, C1 filter, C3 flow valve, C4 1 reversing valve, C5 relief valve, C6 pressure gauge, C7 pressure gauge, C8 relief valve, C9 2 reversing valve. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0023] like Figure 1-4 As shown, a hydraulic coke-breaking and lifting device for large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler includes a tooling structure body, a short joint of a mandrel, a hydraulic hammer crusher, and a hydraulic control circuit of a hydraulic oil station. The tooling structure body is provided with a base 1, a reversing valve 3, a guide rod 2, a top seat 7, and a mandrel. The mandrel short joint is provided with a splitting head, the hydraulic hammer crusher is provided with an LGB68 type hydraulic crusher, and the hydraulic oil station is provided with a hydraulic control circuit. By operating the hydraulic control of the hydraulic oil station, the reversing valve 3 is pushed upward to push the top seat 7 and move along the slideway of the guide box 8, and the conical splitting head provided on the short joint of the mandrel is pressed into the coking rock to split the coking rock and break it into pieces. Replace the hydraulic hammer crusher to hammer and crush the coke rock in the corner of the cold ash hopper.

[0024] The conical design of the splitting head of the short section of the mandrel contacts the irregular coke rock surface to play a role in positioning and splitting the coke rock. The reversing valve 3 cooperates with the hydraulic circuit to achieve slow upward movement and rapid downward movement.

[0025] The tooling structure body is provided with a jacking rod slide 6 which moves in coordination with the guide rod 2, and the hydraulic hammer crushing head is connected and fixed on the base 1 by a pin shaft.

[0026] Two slideways are arranged on the four sides of the rectangular push rod of the lifting rod slide seat 6, respectively, and slide in cooperation with the rectangular slide cylinder on the upper part of the top seat 7 to improve the stability of the push rod.

[0027] The thickness of the cover plate is greater than 1 cm, and the length of the cover plate matches the box body.

[0028] A spherical sleeve is arranged in the pin shaft hole of the top seat 7 of the reversing valve 3 to eliminate the coaxiality error during hydraulic installation or operation.

[0029] There are two waist-shaped holes on each side of the top rod to release structural welding stress and reduce weight.

[0030] This device rationally adopts split combination tooling, and can replace the short section of the ejector rod and the hydraulic breaking head, which is convenient for on-site mobile assembly.

[0031] The design principle of the utility model is as follows:

[0032] A 100-ton reversing valve 3 is used as the main power, and the external oil station is remotely manually controlled. The reversing valve 3 is controlled by the handle to slowly advance and retreat, so that the coke breaking device slowly attacks the coke (mainly to make the coke rock undergo stress quenching and cracking process inside the coke rock under the action of external force, and to protect the water-cooled wall tube at the bottom of the boiler), and the coke rock is broken and the reversing valve 3 is quickly retreated (the main function is to quickly drop the broken coke block under the loss of force, so as to improve work efficiency). The reversing valve 3 is installed and fixed on the base 1, and 4 Φ100mm guide rods 2 are provided at the four corners to connect and fix with the top seat 7. The reversing valve 3 pushes the slide seat to move up and down along the 4 Φ100mm guide rods 2. The center of the slide seat is designed with a rectangular hollow push rod, and 2 slideways are designed on each of the four sides to slide with the upper rectangular slide cylinder of the top seat 7. (The upper rectangular slide cylinder of the top seat 7 is mainly used as a push rod extension guide reinforcement to prevent the push rod from hitting an irregular surface and increasing the torsional modulus of the push rod). The top of the rectangular hollow mandrel is designed with 9 Φ60mm conical splitters (the main function is to contact the bottom of the irregular coke rock to play a positioning role, and the conical splitters drill into the coke rock to split it). In addition, considering that the coke-forming part cannot be broken by using the jacking splitter at the four corners of the boiler bottom, the LGB68 hydraulic crushing head can be replaced to crush the coke rock in the corner. (The hydraulic crushing head is controlled by an independent hydraulic oil station and relies on the jacking device to approach the coke-forming part to perform hammering and coke breaking work), which has achieved the purpose of improving the efficiency of coke breaking and cleaning and ensuring the personal safety of the staff.

[0033] When using a special hydraulic coke-breaking and lifting device to break large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler, the hydraulic control of the hydraulic oil station is used to push the reversing valve 3 upward to push the top seat 7 and move upward along the slideway of the guide box 8, and the conical splitter provided on the short section of the top rod is pressed into the coking rock to split the coking rock and the coking rock falls. Replace the hydraulic hammer crusher to hammer and crush the coking rock in the corner, so as to achieve the purpose of efficient and safe coke breaking and cleaning.

Claims

1. A hydraulic coke breaking and lifting device for large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler, characterized in that: From bottom to top, it includes a base, a guide rod, a reversing valve and a top seat, the top seat is located directly above the base, the guide rod is vertically fixed between the base and the top seat, the reversing valve is vertically fixed at the center of the base, and the guide rod is used to provide a guiding effect for the reversing valve; A lifting rod slide is connected to the top of the reversing valve, and the left and right sides of the lifting rod slide are slidably connected to the guide rod. When the reversing valve is extended or retracted, the lifting rod slide is driven to move up and down; A vertical guide box is fixedly connected above the lifting rod slide seat, and the guide box passes through the top seat and is slidably connected to the top seat; a top rod is fixedly connected to the top of the guide box; and a coke breaking assembly or a crushing head assembly is detachably connected to the top rod.

2. The hydraulic coke breaking and lifting device for large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler according to claim 1 is characterized in that: The coke breaking assembly comprises a vertical mandrel short section, the lower end of which is connected to the top of the mandrel through a flange structure, and the top of the mandrel is provided with a plurality of conical splitting heads.

3. The hydraulic coke breaking and lifting device for large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler according to claim 1 is characterized in that: The crushing head assembly comprises a crushing head seat and a hydraulic crushing head. The lower end of the crushing head seat is connected to the top end of the top rod through a flange structure, and the hydraulic crushing head is connected to the crushing head seat; the hammer rod of the hydraulic crushing head is vertically upward.

4. The hydraulic coke breaking and lifting device for large-area coking and loose coke in the cold ash hopper of a thermal power plant boiler according to claim 2 is characterized in that: Nine Φ60mm conical splitters are designed on the top of the mandrel short section.

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