Ceramic nozzle

Abstract

The utility model belongs to the technical field of petroleum catalytic cracking, and particularly relates to a ceramic nozzle. Comprising a ceramic inner pipe and a metal sleeve arranged outside the ceramic inner pipe in a sleeving mode, the diameter of an upper end inner hole of the ceramic inner pipe is larger than that of a lower end inner hole of the ceramic inner pipe, and the upper end inner hole and the lower end inner hole are communicated through a circular truncated cone hole; a lower clamping table is fixedly connected to the position, located at the bottom end of the ceramic inner pipe, in the metal sleeve, the upper clamping table and the lower clamping table are used for limiting and fixing the ceramic inner pipe, a limiting insertion hole is formed in the side wall of the metal sleeve, and a limiting insertion groove is formed in the position, corresponding to the limiting insertion hole, of the outer wall of the ceramic inner pipe. Metal insertion pieces are installed in the limiting insertion holes and the limiting insertion grooves. According to the utility model, the ceramic inner pipe is fixed in the metal sleeve, and the ceramic inner pipe has better wear resistance, so that the service life is longer, frequent replacement is not needed, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of petroleum catalytic cracking technology, specifically relating to a ceramic nozzle. Background Technology

[0002] Petroleum cracking is a crucial step in processing crude oil into various refined petroleum products. Specifically, it involves cracking large-molecule crude oil into smaller-molecule refined petroleum products. The cracking process is primarily accomplished through heating and catalysis, making catalysts essential components. However, the catalysts currently injected into the cracking unit via nozzles are mostly metal nozzles. These nozzles have poor wear resistance, are easily worn, and have a short lifespan, requiring frequent replacements. This places an additional workload on operators and increases unnecessary maintenance costs. Therefore, there is an urgent need to design a ceramic nozzle with better wear resistance and a longer service life. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model discloses a ceramic nozzle, and specifically discloses the following technical solutions:

[0004] A ceramic nozzle includes a ceramic inner tube and a metal sleeve fitted over the ceramic inner tube. The diameter of the upper inner hole of the ceramic inner tube is larger than the diameter of the lower inner hole, and the upper and lower inner holes are connected by a frustum-shaped hole. An upper retaining platform is fixedly connected to the top of the ceramic inner tube inside the metal sleeve, and a lower retaining platform is fixedly connected to the bottom of the ceramic inner tube inside the metal sleeve. The upper and lower retaining platforms are used to limit and fix the ceramic inner tube. A limiting insertion hole is formed on the side wall of the metal sleeve, and a limiting slot is formed on the outer wall of the ceramic inner tube at the position corresponding to the limiting insertion hole. Metal inserts are installed in the limiting insertion hole and the limiting slot.

[0005] The limiting slot is located at the lower part of the ceramic inner tube, corresponding to the lower end inner hole;

[0006] Both the upper and lower clamping platforms are annular. The diameter of the through hole at the center of the upper clamping platform is greater than or equal to the diameter of the upper inner hole of the ceramic inner tube, and the diameter of the through hole at the center of the lower clamping platform is greater than or equal to the diameter of the lower inner hole of the ceramic inner tube.

[0007] Furthermore, structural adhesive is used to fill the space between the outer wall of the ceramic inner tube and the inner wall of the metal sleeve, between the upper end face of the ceramic inner tube and the bottom surface of the upper mounting platform, and between the lower end face of the ceramic inner tube and the top surface of the lower mounting platform.

[0008] Furthermore, both the upper and lower clamping platforms are welded inside the metal sleeve, and a 45° welding bevel is provided between the outer top end of the upper clamping platform and the inner wall of the metal sleeve, and a 45° welding bevel is provided between the outer bottom end of the lower clamping platform and the inner wall of the metal sleeve.

[0009] Furthermore, the metal insert is set flat on the side near the limiting slot, and the side away from the limiting slot is an arc-shaped structure that matches the outer wall of the metal sleeve.

[0010] Furthermore, the metal insert and the limiting insertion hole are fixed by welding.

[0011] Furthermore, a 45° welding bevel is provided between the lower surface of the metal insert and the lower sidewall of the limiting insertion hole, and between the upper surface of the metal insert and the upper sidewall of the limiting insertion hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this invention, a ceramic inner tube is fixed inside the metal sleeve. The ceramic inner tube has better wear resistance, resulting in a longer service life and reducing the need for frequent replacement, thus lowering maintenance costs.

[0014] A limiting insertion hole is provided on the side wall of the metal sleeve, and a limiting slot is provided on the outer wall of the ceramic inner tube at the position corresponding to the limiting insertion hole. Metal inserts are installed in the limiting insertion hole and the limiting slot, which can facilitate fixing the ceramic inner tube and the metal sleeve together. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the ceramic inner tube in this utility model.

[0017] Figure 3 for Figure 1 A cross-sectional view along the AA direction.

[0018] Figure 4 This is a top view of the metal insert in this utility model.

[0019] 1-Ceramic inner tube, 2-Metal sleeve, 3-Structural adhesive, 4-Upper locking platform, 5-Lower locking platform, 6-Metal insert, 7-Limiting slot. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-4 A ceramic nozzle includes a ceramic inner tube 1 and a metal sleeve 2 sleeved outside the ceramic inner tube 1. The diameter of the upper inner hole of the ceramic inner tube 1 is larger than the diameter of the lower inner hole. The upper inner hole and the lower inner hole are connected through a frustum-shaped hole. An upper clamping platform 4 is fixedly connected to the top of the ceramic inner tube 1 inside the metal sleeve 2, and a lower clamping platform 5 is fixedly connected to the bottom of the ceramic inner tube 1 inside the metal sleeve 2. The upper clamping platform 4 and the lower clamping platform 5 are used to limit and fix the ceramic inner tube 1. A limiting insertion hole is opened on the side wall of the metal sleeve 2, and a limiting slot 7 is opened on the outer wall of the ceramic inner tube 1 at the position corresponding to the limiting insertion hole. A metal insert 6 is installed in the limiting insertion hole and the limiting slot 7.

[0022] The metal sleeve 2 has a ceramic inner tube 1 fixed inside. The ceramic inner tube 1 has better wear resistance, resulting in a longer service life and reducing the need for frequent replacement, thus lowering maintenance costs. After the metal insert 6 is inserted into the aligned limiting slot 7 and limiting hole, the metal sleeve 2 and the ceramic inner tube 1 can be limited and fixed.

[0023] In this embodiment, the limiting slot 7 is opened at the lower part of the ceramic inner tube 1, corresponding to the lower end inner hole, so that the limiting slot 7 and the inner hole of the ceramic inner tube 1 are reserved with sufficient side wall thickness.

[0024] In this embodiment, both the upper clamping platform 4 and the lower clamping platform 5 are annular. The diameter of the through hole at the center of the upper clamping platform 4 is greater than or equal to the diameter of the upper inner hole of the ceramic inner tube 1, and the diameter of the through hole at the center of the lower clamping platform 5 is greater than or equal to the diameter of the lower inner hole of the ceramic inner tube 1, thereby ensuring that the upper clamping platform 4 and the lower clamping platform 5 will not obstruct the passage of the catalyst in the ceramic inner tube 1.

[0025] In this embodiment, structural adhesive 3 is filled between the outer wall of the ceramic inner tube 1 and the inner wall of the metal sleeve 2, between the upper end face of the ceramic inner tube 1 and the bottom face of the upper mounting platform 4, and between the lower end face of the ceramic inner tube 1 and the top face of the lower mounting platform 5, so as to further fix the ceramic inner tube 1 and improve the stability of the ceramic inner tube 1.

[0026] In this embodiment, both the upper clamping platform 4 and the lower clamping platform 5 are welded inside the metal sleeve 2. A 45° welding bevel is provided between the outer top end of the upper clamping platform 4 and the inner wall of the metal sleeve 2, and a 45° welding bevel is provided between the outer bottom end of the lower clamping platform 5 and the inner wall of the metal sleeve 2, so as to ensure the strength of the weld.

[0027] In this embodiment, the side of the metal insert 6 closest to the limiting slot 7 is straight, while the side furthest from the limiting slot 7 is an arc-shaped structure that matches the outer wall of the metal sleeve 2, thereby ensuring that the insertion of the metal insert 6 will not affect the shape of the metal sleeve 2.

[0028] In this embodiment, the metal insert 6 is fixed to the limiting insertion hole by welding.

[0029] In this embodiment, a 45° welding bevel is provided between the lower surface of the metal insert 6 and the lower sidewall of the limiting insertion hole, and between the upper surface of the metal insert 6 and the upper sidewall of the limiting insertion hole, thereby ensuring the strength of the weld.

[0030] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A ceramic nozzle, characterized in that, The device includes a ceramic inner tube and a metal sleeve fitted over the ceramic inner tube. The diameter of the upper inner hole of the ceramic inner tube is larger than the diameter of the lower inner hole, and the upper and lower inner holes are connected by a frustum-shaped hole. An upper locking platform is fixedly connected to the top of the ceramic inner tube inside the metal sleeve, and a lower locking platform is fixedly connected to the bottom of the ceramic inner tube inside the metal sleeve. The upper and lower locking platforms are used to limit and fix the ceramic inner tube. A limiting insertion hole is provided on the side wall of the metal sleeve, and a limiting slot is provided on the outer wall of the ceramic inner tube at the position corresponding to the limiting insertion hole. Metal inserts are installed in the limiting insertion hole and the limiting slot. The limiting slot is located at the lower part of the ceramic inner tube, corresponding to the lower end inner hole; Both the upper and lower clamping platforms are annular. The diameter of the through hole at the center of the upper clamping platform is greater than or equal to the diameter of the upper inner hole of the ceramic inner tube, and the diameter of the through hole at the center of the lower clamping platform is greater than or equal to the diameter of the lower inner hole of the ceramic inner tube.

2. A ceramic nozzle according to claim 1, characterized in that, Structural adhesive is used to fill the space between the outer wall of the ceramic inner tube and the inner wall of the metal sleeve, between the upper end face of the ceramic inner tube and the bottom face of the upper mounting platform, and between the lower end face of the ceramic inner tube and the top face of the lower mounting platform.

3. A ceramic nozzle according to claim 1, characterized in that, Both the upper and lower clamping platforms are welded inside the metal sleeve. A 45° welding bevel is provided between the top outer end of the upper clamping platform and the inner wall of the metal sleeve, and a 45° welding bevel is provided between the bottom outer end of the lower clamping platform and the inner wall of the metal sleeve.

4. A ceramic nozzle according to claim 1, characterized in that, The metal insert is set flat on the side near the limiting slot, and the side away from the limiting slot is an arc-shaped structure that matches the outer wall of the metal sleeve.

5. A ceramic nozzle according to claim 1, characterized in that, The metal insert is fixed to the limiting hole by welding.

6. A ceramic nozzle according to claim 5, characterized in that, A 45° welding bevel is provided between the lower surface of the metal insert and the lower sidewall of the limiting hole, and between the upper surface of the metal insert and the upper sidewall of the limiting hole.

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