CN213977570U - Fixture for online replacement of coal lock lower valve backing ring of Lurgi gasifier - Google Patents

Abstract

The utility model discloses a fixture of lurgi gasifier online replacement coal lock lower valve backing ring relates to the technical field of lurgi gasifier, the utility model provides a can realize online replacement coal lock lower valve backing ring's solution, the utility model discloses a can dock into half on the left side and half on the right side of tubular construction, half on the left side with half arc mouth both ends on the right side are provided with first connecting plate and second connecting plate respectively, first connecting plate with the connection can be dismantled to the second connecting plate.

Description

Fixture for online replacement of coal lock lower valve backing ring of Lurgi gasifier

Technical Field

The utility model relates to a technical field of lurgi gasifier specifically is a fixture of lurgi gasifier online replacement coal lock lower valve backing ring.

Background

The lurgi gasifier is a coal gasification plant proposed in 1963 by lurgi, germany, and comprises a bunker, a coal lock, a gasifier, an ash lock, a cooling scrubber, an ash pan, and an ash lock expander, see fig. 1. Wherein, the coal lock is a pressure container which intermittently adds coal in the coal bunker into the gasification furnace. The upper part is connected with the coal bunker, and the lower part is connected with the gasification furnace. The middle of the structure is a cylindrical barrel, the upper part of the structure is connected with a butterfly-shaped end socket, and the upper and lower inlets and outlets are respectively provided with a coal lock upper valve and a coal lock lower valve for control. The side direction is connected with a coal lock charging pipeline, a pressure relief pipeline and a rocker shaft 4 for driving a coal lock lower valve to act.

Regarding the coal lock lower valve, the coal lock lower valve is a disk valve, a valve seat is fixed on the inner side of a flange connected with a coal lock and a gasification furnace, a valve head is connected with a valve rod through a bolt, the valve rod is provided with two sliding supporting points in a coal lock guide cylinder, a supporting frame of the guide cylinder is fixed on the inner wall of the coal lock, the valve rod in the guide cylinder is in 90-degree sliding connection with an inner swing rod in the coal lock, the inner swing rod is connected with a swing arm shaft 4 through a middle pin, the swing arm shaft 4 extends out of the coal lock, and a hydraulic driving device outside the coal lock drives the valve head to move up and down so as to realize the switching function of the lower valve.

In the prior art, the coal lock lower valve is designed as follows: the switch function of the lower valve is achieved through the synchronous action of the hydraulic driving device, the outer swing rod, the rocker shaft 4, the inner swing rod and the valve rod. During operation of the coal lock, the internal pressure of the coal lock, which is higher than the external pressure, will impart an outward force on the rocker shaft 4, which will move the rocker shaft 4 outward. Referring to fig. 2, the main function of the coal lock lower valve backing ring 5 is to position the rocker shaft 4 to prevent the rocker shaft 4 from moving outward. The coal lock lower valve backing ring 5 bears the outward acting force of the rocker shaft 4 and also bears the circumferential friction force when the coal lock lower valve is opened and closed, so the coal lock lower valve backing ring 5 has high wear speed and needs to be replaced at regular time.

If the coal lock lower valve backing ring 5 is not replaced in time, the rocker arm shaft 4 can move outwards due to abrasion of the coal lock lower valve backing ring, the rocker arm shaft 4 is separated from the inner swing rod, the hydraulic cylinder loses control over the coal lock lower valve rod, and the coal lock lower valve falls. The control of the coal lock lower valve gasket ring 5 is extremely critical.

The off-line maintenance of the coal lock due to the abrasion of the backing ring 5 needs the shutdown of the gasification furnace, and the whole process operation process of the shutdown of the gasification furnace comprises a plurality of complicated process measures such as pressure relief, coal discharge, replacement, temperature reduction and the like. The raw material coal in the gasification furnace is required to be completely discharged and is required to be matched with a maintainer to conduct a blind plate. Not only influences the gas production of the gasification section, but also causes waste in the aspects of raw materials and labor. If the method of replacing the coal locking lower valve backing ring 5 on line is adopted, the economic loss caused by the shutdown of the gasification furnace can be avoided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fixture of valve backing ring under lurgi gasifier online replacement coal lock, it is including half one on the left side and the right side that can dock into the tubular construction, half one on the left side with half arc mouth both ends on the right side are provided with first connecting plate and second connecting plate respectively, first connecting plate with the connection can be dismantled to the second connecting plate.

The utility model discloses a further set up to: the first connecting plate and the second connecting plate are respectively provided with a convex rib and a clamping groove which are matched with each other.

The utility model discloses a further set up to: the two clamping grooves are arranged at two ends of the second connecting plates, which deviate from each other.

The utility model discloses a further set up to: one of the first connecting plates is fixed with a sliding groove, one of the second connecting plates is fixed with a sliding block, the sliding block is arranged in the sliding groove in a sliding mode, and the sliding direction of the sliding groove is consistent with the butt joint direction of the left half part and the right half part.

The utility model discloses a further set up to: reinforcing ribs are respectively arranged on the surfaces of the left half part and the right half part which are deviated from each other, and the directions of the reinforcing ribs are vertical to the axis direction of the circular tube structure.

The utility model discloses a further set up to: the first connecting plate and the second connecting plate are connected through bolts.

The utility model discloses a further set up to: and the holes for penetrating the bolts penetrate through the reinforcing ribs.

The utility model has the advantages of:

through using this kind of special fixture, on handling the processing of coal lock lower valve switch not smooth, lower valve cylinder damage change, backing ring wearing and tearing change equipment problems, must park the off-line maintenance by original coal lock, become and to not stop the online maintenance, great simplification the maintenance flow, shortened maintenance time, saved the maintenance cost, increased the benefit output of single gasifier, reduced maintenance safety risk.

Drawings

FIG. 1 is a schematic view of a configuration of a lurgi gasifier of the prior art;

FIG. 2 is a cross-sectional view of a prior art lurgi gasifier at the coal lock lower valve;

FIG. 3 shows an isometric test of the fixture for online replacement of the lower valve backing ring of the coal lock of the lurgi gasifier of the present invention in FIG. 1;

FIG. 4 shows an isometric test of the fixture for online replacement of the lower valve backing ring of the coal lock of the Lurgi gasifier of the present invention FIG. 2;

FIG. 5 is a schematic diagram 1 showing the configuration of a lurgi gasifier at the coal lock down valve;

FIG. 6 is a schematic diagram 2 showing the configuration of a lurgi gasifier at the coal lock down valve;

reference numerals: 1. a left half part; 11. a rib; 12. a chute; 2. a right half portion; 21. a card slot; 22. A slider; 3. reinforcing ribs; 4. a rocker shaft; 5. a backing ring; 6. a material pressing cover; 7. an outer swing link; 8. a hydraulic cylinder; 9. and (4) opening.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

The utility model provides a chucking appliance of a Luqi gasifier online replacement coal lock lower valve backing ring 5, including can dock into half left 1 and half right 2 of tubular construction. The two ends of the arc openings of the left half part 1 and the right half part 2 are respectively provided with a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate can be detachably connected, specifically, connected through bolts, and the bolts are not shown in the attached drawings.

The first connecting plate and the second connecting plate are respectively provided with a convex rib 11 and a clamping groove 21 which are matched with each other. The effect of bead 11 and draw-in groove 21 is in order to make the effect of left half 1 and right half 2 accurate butt joint, if do not have bead 11 and draw-in groove 21, be very easy when left half 1 and right half 2 butt joint for think the factor causes the circle that forms irregularly, like this when fastening left half 1 and right half 2 through the bolt, can make left half 1 and right half 2 atress inhomogeneous, cause local damage to the part of centre gripping and self, to the part that the roughness of surface required height, the damage that causes is especially serious. In addition, the two clamping grooves 21 are arranged at two ends of the two second connecting plates, which are deviated from each other. This is designed to facilitate the detachment of the left and right halves 1 and 2. Because the cooperation of rib 11 and draw-in groove 21 needs rib 11 and the wall laminating of draw-in groove 21 and slip, but if the wall of draw-in groove 21 is closed, then will cause the dismantlement more difficultly because of the restraint of structure and the friction of wall when dismantling, and the wall of draw-in groove 21 adopts open design then can effectual improvement this problem.

Furthermore, in order to improve the deformation resistance, two reinforcing ribs 3 are integrally formed on the left half portion 1 and the right half portion 2, respectively. The reinforcing ribs 3 are arranged on the surfaces of the left half part 1 and the right half part 2 which are opposite to each other, and the direction of the reinforcing ribs 3 is vertical to the axial direction of the circular tube structure. Holes for passing bolts are simultaneously penetrated through the reinforcing ribs 3. Because the fastening force generated by the bolt directly acts on the reinforcing rib 3, the deformation resistance is stronger, and the local stress surge at the periphery of the bolt is avoided.

In addition, in order to make the use of the left half part 1 and the right half part 2 more convenient and to be convenient for carrying and storing, one of the first connecting plates is welded and fixed with a sliding groove 12, one of the second connecting plates is welded and fixed with a sliding block 22, the sliding block 22 is arranged in the sliding groove 12 in a sliding manner, and the sliding direction of the sliding groove 12 is consistent with the butt joint direction of the left half part 1 and the right half part 2. The sliding block 22 specifically includes a cylindrical protruding column and a blocking piece located at one end of the protruding column away from the first connecting plate, and the blocking piece and the protruding column are integrally formed. Based on the structure of the sliding block 22 and the sliding groove 12, the left half part 1 and the right half part 2 can not be separated, can rotate relatively and can move linearly relatively, so that the operation flexibility is increased, and the carrying and the use are convenient.

The specific implementation process comprises the following steps: the fixture is mounted on the rocker shaft 4, as shown in detail in fig. 5 and 6, and the structure of the coal lock lower valve is as follows: the coal lock casing is provided with a through opening 9, the opening 9 is designed in the prior art, and the rocker arm shaft 4 can be directly seen from the opening 9. The two ends of the rocker arm shaft 4 positioned in the opening 9 are respectively provided with a material pressing cover 6 and a backing ring 5. The fixture is clamped to the rocker shaft 4 and between the backing ring 5 and the swage cap 6. When the rocker arm shaft 4 rotates, the first connecting plate and the second connecting plate will abut against the inner wall of the opening 9, so that the rotation of the rocker arm shaft 4 will be limited, and the lower valve rod of the coal lock can be prevented from being transferred into the gasification furnace. The backing ring 5 can then be replaced by simply removing the hydraulic cylinder 8 and the outer rocker 7. Conventionally, when the backing ring 5 is replaced, the furnace needs to be shut down, the entire coal lock is removed, and the replacement is performed on the ground. After the fixture is used, the furnace does not need to be shut down, and the coal lock does not need to be dismounted integrally to be maintained, so that online replacement is realized, the overhaul flow is greatly simplified, the overhaul time is shortened, the overhaul cost is saved, the benefit output of a single gasification furnace is increased, and the overhaul safety risk is reduced.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, various features shown in the various embodiments may be combined in any combination as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (7)

1. The utility model provides a fixture of valve backing ring (5) under coal lock is changed on line to lurgi gasifier which characterized in that: including can half (1) on the left side and half (2) on the right side that dock into the tubular construction, half (1) on the left side with the arc mouth both ends of half (2) on the right side are provided with first connecting plate and second connecting plate respectively, first connecting plate with the connection can be dismantled to the second connecting plate.

2. The clamp for on-line replacement of the coal locking lower valve backing ring (5) of the lurgi gasifier according to claim 1, wherein: the first connecting plate and the second connecting plate are respectively provided with a convex rib (11) and a clamping groove (21) which are matched with each other.

3. The clamp for on-line replacement of the coal locking lower valve backing ring (5) of the lurgi gasifier according to claim 2, wherein: the two clamping grooves (21) are arranged at two ends of the two second connecting plates, which are deviated from each other.

4. The clamp for on-line replacement of the coal locking lower valve backing ring (5) of the lurgi gasifier according to claim 1, wherein: one of the first connecting plates is fixed with a sliding groove (12), one of the second connecting plates is fixed with a sliding block (22), the sliding block (22) is arranged in the sliding groove (12) in a sliding mode, and the sliding direction of the sliding groove (12) is consistent with the butt joint direction of the left half part (1) and the right half part (2).

5. The clamp for on-line replacement of the coal locking lower valve backing ring (5) of the lurgi gasifier according to claim 1, wherein: reinforcing ribs (3) are respectively arranged on the surfaces of the left half part (1) and the right half part (2) which face away from each other, and the direction of each reinforcing rib (3) is perpendicular to the axis direction of the circular tube structure.

6. The clamp for on-line replacement of the coal lock lower valve backing ring (5) of the lurgi gasifier according to claim 1 or 5, wherein: the first connecting plate and the second connecting plate are connected through bolts.

7. The clamp for on-line replacement of the coal locking lower valve backing ring (5) of the lurgi gasifier according to claim 5, wherein: holes for penetrating bolts penetrate through the reinforcing ribs (3).

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