NH-shaped anchoring nail for heat-insulation wear-resistant lining

Abstract

The utility model discloses an NH-shaped anchoring nail for a heat-insulating wear-resistant lining. The NH-shaped anchoring nail comprises an NH-shaped cap, a hexagonal head bolt and a cylindrical stud, the connecting surface of the NH-shaped cap and the hexagonal head bolt is H-shaped, and four edges of the H shape are respectively and vertically connected with a branch wing; each branch wing is at least stamped to form a tongue-shaped claw tooth extending inwards and a tongue-shaped claw tooth extending outwards, and the tongue-shaped claw tooth extending inwards and the tongue-shaped claw tooth extending outwards are parallel to each other and form an N-shaped structure with the branch wings. The lining material mixed with the steel fibers can freely flow in the NH-shaped cap, so that the construction requirements of the wear-resistant lining and the heat-insulating wear-resistant lining on formwork casting and self-flow casting are met. The tongue-shaped claw teeth which are arranged in a layered manner can better realize the functions of framework reinforcement and lining grasping of the wear-resistant lining; the branch wings are made of L-shaped angle steel, so that the NH-shaped cap has better strength and rigidity, and further the NH-shaped cap has better heat strength supporting capacity in a high-temperature environment.

Description

Technical Field

[0001] This utility model belongs to the fields of petrochemical and coal chemical industries, and is mainly used in heat-insulating and wear-resistant lining equipment for catalytic cracking units and methanol-to-olefins units. Specifically, it relates to an NH-shaped anchor for heat-insulating and wear-resistant linings. Background Technology

[0002] In the reaction regeneration systems of petrochemical catalytic cracking units and coal chemical methanol-to-olefins units, equipment such as riser reactors, catalyst delivery pipes, and flues typically transport high-temperature oil and gas or flue gas at 500℃ to 750℃, containing a large amount of molecular sieve catalyst with a median particle size of 80μm, with a flow velocity typically between 10m / s and 35m / s. To ensure that these lined devices are not eroded by the high-temperature, high-speed media, heat insulation and wear-resistant linings are required on the inner walls of the equipment. However, in existing traditional technologies, the side-pull ring type anchoring nails cannot achieve formwork casting of the wear-resistant lining due to the structural limitations of the side pull ring itself, and can only be constructed by manual tamping. Manually applied and tamped wear-resistant linings cannot guarantee key properties such as density, strength, and wear resistance. During equipment operation, the high-speed flowing, high-temperature oil and gas or flue gas containing a large amount of catalyst will continuously erode and carve out the lining, forming cracks, grooves, and other defects. This will penetrate the wear-resistant layer and further carve out the weakly wear-resistant heat insulation lining, causing the equipment shell to overheat and ultimately leading to unplanned shutdown of the unit.

[0003] Chinese patent CN201620053668.7 discloses a side-pull ring type anchor for heat-insulating and wear-resistant lining. By welding the head of the connecting bolt of the ring anchor to the bottom of the side pull ring cap of the ring anchor, the length of the connecting nut head can be adjusted according to actual needs, thereby changing the thickness of the wear-resistant layer to meet the needs of different engineering conditions. However, because the top of the side pull ring type anchor is a circular or polygonal ring cap, the lining cannot flow freely into the circular or polygonal ring cap, and the steel fibers in the lining cannot be evenly distributed in the circular or polygonal ring cap.

[0004] The NH-shaped anchor nail for the heat-insulating and wear-resistant lining of this utility model can achieve free flow of the heat-insulating and wear-resistant lining by adopting the NH-shaped structure, without affecting the uniform distribution of steel fibers mixed in the lining. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides an NH-shaped anchor for heat-insulating and wear-resistant linings. By using an NH-shaped cap, the lining mixed with steel fibers can flow freely through the NH-shaped structure without affecting the uniform distribution of the steel fibers mixed in the lining, thus enabling the casting of the wear-resistant lining.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An NH-shaped anchor for heat-insulating and wear-resistant lining includes an NH-shaped cap, a hexagonal head bolt, and a cylindrical stud. One end of the hexagonal head bolt is externally threaded, and the other end is unthreaded. The externally threaded end of the hexagonal head bolt passes through the NH-shaped cap and connects with the cylindrical stud, which is machined into an internal thread. The connection surface between the NH-shaped cap and the hexagonal head bolt is H-shaped, and each branch of the H-shape is stamped with at least one inwardly extending and one outwardly extending tongue-shaped claw. The inwardly extending and outwardly extending tongue-shaped claws are parallel to each other and form an N-shaped structure with the branch wings.

[0008] The present invention relates to an NH-shaped anchor for heat-insulating and wear-resistant lining, which is further characterized in that: the branch wing is an L-shaped angle steel.

[0009] The present invention relates to an NH-shaped anchor for heat-insulating and wear-resistant lining, which is further characterized in that: the length of the tongue-shaped claw is 10mm to 18mm, and the angle between the tongue-shaped claw and the branch wing is 30° to 75°.

[0010] This utility model discloses an NH-shaped anchor for heat-insulating and wear-resistant linings, further characterized in that: the NH-shaped cap has a length of 65mm to 80mm, a width of 50mm to 60mm, and a height of 20mm to 50mm, which can be adjusted according to the thickness of the wear-resistant lining layer.

[0011] The present invention relates to an NH-shaped anchor for heat-insulating and wear-resistant lining, which is further characterized in that: the diameter of the cylindrical stud is φ10mm~φ12mm, and its length is determined according to the thickness of the heat-insulating and wear-resistant lining.

[0012] The present invention relates to an NH-type anchor for heat-insulating and wear-resistant lining, which is further characterized in that: it also includes a rubber cap, which is fitted onto the end of the cylindrical stud; the end of the hexagonal head bolt is machined into a pointed tip.

[0013] The rubber cap is fitted onto the end of the cylindrical stud and the hexagonal head bolt connection side to prevent the lining from entering its internal threads during the construction of the insulation lining. The rubber cap is fitted before the insulation lining is set up. After the insulation lining is completed and cured, the rubber cap is pierced with the head of the hexagonal head bolt, and the NH-shaped cap is fastened to the cylindrical stud together with the hexagonal head bolt.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model has an open and free structure with "N" and "H" shapes in its NH-shaped cap, which allows the lining material mixed with steel fiber to flow freely in the NH-shaped cap, thus realizing the construction requirements of formwork casting and self-flowing casting for wear-resistant lining and heat-insulating wear-resistant lining.

[0016] 2. The layered tongue-shaped claws can better strengthen the skeleton of the wear-resistant lining and provide better gripping effect; the branch wings use L-shaped angle steel, which gives the NH-shaped cap better strength and rigidity, and thus gives it better thermal support in high-temperature environments. This ensures that the lining will not crack or even fall off due to insufficient thermal support of the lining anchors in high-temperature and high-speed media erosion environments, thus ensuring the integrity of the lining.

[0017] 3. Compared with the existing H-shaped anchors, the NH-shaped cap has a higher material utilization rate. The utilization rate of the total area of ​​the processed steel plate by the NH-shaped cap reaches 77%, which is higher than the approximately 60% of the existing H-shaped anchors, making it more economical. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an NH-shaped anchor nail structure for a heat-insulating and wear-resistant lining according to this utility model;

[0019] Figure 2 This is a top view of the NH-shaped cap of this utility model;

[0020] Figure 3 This is a schematic diagram of the hexagonal head stud structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the cylindrical stud and the rubber cap of this utility model;

[0022] The attached figures are labeled as follows: 1-NH-shaped cap, 2-hexagonal head bolt, 3-cylindrical stud, 4-rubber cap. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments do not limit the scope of protection claimed by the present invention.

[0024] As attached Figure 1 As shown, this utility model includes an NH-shaped cap 1, a hexagonal head bolt 2, a cylindrical stud 3, and a rubber cap 4. The external threaded end of the hexagonal head bolt 2 passes through the NH-shaped cap 1 and connects to the internal thread of the cylindrical stud 3. One end of the cylindrical stud 3 is connected to the hexagonal head bolt 2, and the other end is connected to the equipment housing. The length of the cylindrical stud is the thickness of the heat insulation lining. The rubber cap 4 is fitted over the external end of the cylindrical stud 3 with its internal thread.

[0025] In use, first weld the unthreaded end of the cylindrical stud 3 to the side of the equipment shell where the heat insulation and wear-resistant lining needs to be installed, according to the design documents. Then, put the rubber cap 4 on the threaded end of the cylindrical stud 3. Then, perform the heat insulation layer formwork and lining pouring. After the lining template is removed, use the pointed part of the hexagonal head bolt 2 to pass through the NH-shaped cap 1 and pierce the rubber cap 4. Tighten the NH-shaped cap to the cylindrical stud 3. Then, perform the wear-resistant layer formwork and lining pouring. After a certain period of time, remove the template, complete the lining curing and drying, and a high-strength lining with both heat insulation and wear resistance layers formed by formwork pouring can be obtained.

[0026] The above description is merely a typical example of this utility model and does not impose any limitations on this utility model. Any changes or modifications made by those skilled in the art using the above technical content without departing from the scope of the technical solution of this utility model should be considered equivalent examples of equivalent changes. Any equivalent changes made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. An NH-shaped anchor for a thermally insulated wear-resistant lining, characterized in that: The application relates to a hexagonal head bolt and a cylindrical stud, and a NH-shaped cap is arranged on the hexagonal head bolt; the hexagonal head bolt is externally threaded at one end and non-threaded at the other end; the externally threaded end of the hexagonal head bolt penetrates through the NH-shaped cap and is connected with the cylindrical stud which is internally threaded; the connecting surface of the NH-shaped cap and the hexagonal head bolt is H-shaped, each branch wing of the H-shaped structure is punched to form at least one inwardly extending tongue-shaped claw and one outwardly extending tongue-shaped claw; the inwardly extending tongue-shaped claw and the outwardly extending tongue-shaped claw are parallel to each other and form an N-shaped structure with the branch wing.

2. The NH-shaped anchor peg for thermally insulated wear linings according to claim 1, characterized in that: The branch wing is an L-shaped angle steel.

3. The NH-shaped anchor for thermally insulated wear linings according to claim 1, characterized in that: The length of the tongue-shaped claw is 10mm-18mm, and the included angle between the tongue-shaped claw and the branch wing is 30-75 degrees.

4. The NH-shaped anchor for thermally insulated wear linings according to claim 1, characterized in that: The length of the NH-shaped cap is 65-80mm, the width is 50-60mm, and the height is 20-50mm.

5. The NH-shaped anchor for thermally insulated wear linings according to claim 1, characterized in that: The diameter of the cylindrical stud is phi 10mm-phi 12mm.

6. The NH-shaped anchor for thermally insulated wear linings according to claim 1, characterized in that: The application further relates to a rubber cap which is sleeved on the end of the cylindrical stud, and the end of the hexagonal head bolt is pointed.

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