Cushioning ceramic nozzle with novel structure

Abstract

The utility model relates to the technical field of petrochemical catalytic cracking devices, in particular to a cushioning ceramic nozzle with a novel structure, which comprises a composite ceramic tube, retaining edges are arranged at two ends of the composite ceramic tube along the axial direction, and refractory ceramic fibers are arranged among the composite ceramic tube, the retaining edges and an equipment main body. A fixing pipe clamp is arranged on the outer side of the refractory ceramic fiber; according to the utility model, a seamless steel tube outside the composite ceramic tube is omitted, the looseness between different materials of the outer sleeve and the composite ceramic tube is avoided under the vibration and stress fluctuation states, the stability of the equipment is improved, and the refractory ceramic fibers are filled between the pore plate and the composite ceramic tube and play a role in cushioning, so that the stress is convenient to release, and the service life of the equipment is prolonged. And the fixing mode adopts pipe clamp fixed connection, so that the composite ceramic pipe is convenient to overhaul and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical catalytic cracking devices, in particular to a damping ceramic nozzle with a new structure. Background Art

[0002] The application scenarios of nozzles in catalytic cracking units are very wide. Conventional nozzle structures are generally made of round steel machined or seamless steel pipes with ceramic cores. Figure 1 Taking the orifice pressure reducer as an example, the channel hole of the orifice plate adopts a nozzle structure of composite ceramics built in a seamless steel pipe. The purpose of the composite ceramics is wear resistance; the seamless steel pipe is used as an outer sleeve and welded to the orifice body to fix it, and the gap between the composite ceramic tube and the outer sleeve (steel pipe) is filled with cement. Years of maintenance and observation show that the wear-resistant material and the main material of the channel are not damaged due to the deterioration of wear resistance, but mainly due to the vibration caused by the high-speed flow of flue gas and the inconsistent material expansion rate under temperature fluctuations. The composite ceramics of this structure will produce a large number of ruptures under stress damage and will be gradually blown away by the high-speed airflow. The airflow passing through the rough outer sleeve will accelerate the wear of the outer sleeve, resulting in unbalanced pressure at the inlet and outlet of the double-acting slide valve and delayed switching; the pressure drop at the inlet and outlet of the range hood fluctuates greatly, reducing the utilization rate of the kinetic energy of the heat energy conversion of the range hood. Eventually, the orifice pressure reducer fails, and the maintenance frequency and cost increase. Utility Model Content

[0003] In view of the shortcomings of the existing nozzles, the purpose of the utility model is to propose a new type of shock-absorbing ceramic nozzle to solve the problems raised in the above background technology.

[0004] The purpose of this utility model is to adopt the following technical solutions to achieve:

[0005] A new type of shock-absorbing ceramic nozzle with a new structure proposed in the utility model includes a composite ceramic tube, wherein both ends of the composite ceramic tube are provided with retaining edges along the axial direction, refractory ceramic fibers are arranged between the composite ceramic tube, the retaining edges and the equipment body, and a fixed pipe clamp is arranged on the outside of the refractory ceramic fibers.

[0006] Further, referring to the direction of the fluid, a small baffle is provided at the outlet of the composite ceramic tube, and a large baffle is provided at the inlet of the composite ceramic tube.

[0007] Furthermore, the fixed pipe clamp is arranged between the equipment body and the small stop edge.

[0008] Furthermore, the fixed pipe clamp comprises two half-pipe clamps arranged opposite to each other, both ends of each half-pipe clamp are provided with threaded holes, and pipe clamp fastening bolts are fixedly arranged in the threaded holes.

[0009] The utility model can obtain the following advantages:

[0010] (1) The utility model eliminates the seamless steel pipe outside the composite ceramic tube, thus avoiding loosening between the outer sleeve and the composite ceramic tube under vibration and stress fluctuation conditions, thereby improving the stability of the equipment;

[0011] (2) The utility model fills refractory ceramic fibers between the orifice plate and the composite ceramic tube, and the refractory ceramic fibers play a shock absorbing role, facilitating the release of stress;

[0012] (3) The fixing method of the utility model adopts a pipe clamp fixing connection, which is convenient for the inspection and replacement of the composite ceramic pipe.

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of installing an existing nozzle on an orifice pressure reducer.

[0015] Figure 2 The utility model is a schematic diagram of installing a new structure of a damping ceramic nozzle on an orifice pressure reducer.

[0016] [Reference Signs]

[0017] 1. Orifice plate; 2. Composite ceramic tube; 21. Small baffle; 22. Large baffle; 3. Refractory ceramic fiber; 4. Fixed pipe clamp; 5. Pipe clamp fastening bolt; 6. Outer sleeve; 7. End cover; 8. Welding foot. DETAILED DESCRIPTION

[0018] The features and exemplary embodiments of various aspects of the utility model will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without the need for some of these specific details. The following description of the embodiment is only to provide a better understanding of the utility model by showing an example of the utility model. In the accompanying drawings and the following description, at least part of the known structures and prior art are not shown to avoid unnecessary ambiguity in the utility model; and, for clarity, the size and shape of some structures may be exaggerated. The features, structures or characteristics described below can be combined in one or more embodiments in any suitable manner. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity.

[0019] The utility model provides Figure 2 A new type of shock-absorbing ceramic nozzle is shown, comprising a composite ceramic tube 2, both ends of the composite ceramic tube 2 along the axial direction are provided with outwardly extending retaining edges, refractory ceramic fibers 3 are arranged between the composite ceramic tube 2, the retaining edges and the channel opening of the orifice plate 1, the refractory ceramic fibers 3 play a shock-absorbing role and facilitate the release of stress, and a fixed pipe clamp 4 is arranged on the outside of the refractory ceramic fibers 3.

[0020] The composite ceramic tube 2 is arranged through the channel hole of the orifice plate 1. Referring to the direction of the fluid, a small baffle 21 is arranged at the outlet of the composite ceramic tube 2, and a large baffle 22 is arranged at the inlet of the composite ceramic tube 2. The radial cross-sectional circular diameter of the small baffle 21 is larger than the radial cross-sectional circular diameter of the composite ceramic tube 2, and the radial cross-sectional circular diameter of the large baffle 22 is larger than the radial cross-sectional circular diameter of the small baffle 21. The large baffle 22 and the small baffle 21 are respectively located on the left and right sides of the orifice plate 1; when installing the nozzle, the small baffle 21 and the large baffle 22 can both play a limiting role to fix the nozzle.

[0021] The fixed pipe clamp 4 is arranged between the orifice plate 1 and the small stop edge 21; under the action of the fixed pipe clamp 4, the composite ceramic tube 2 can be prevented from falling off. Specifically, the fixed pipe clamp 4 includes two relatively arranged half pipe clamps, each half pipe clamp is obtained by bending flat iron or channel steel, and both ends of each half pipe clamp are provided with threaded holes, and the threaded holes are fixed with pipe clamp fastening bolts; the utility model eliminates the following Figure 1 The welding fixing method shown is replaced by a pipe clamp fixing method, which is convenient for the inspection and replacement of the composite ceramic tube 2.

[0022] The specific operation of the novel structure of the shock-absorbing ceramic nozzle of the utility model is as follows:

[0023] First, insert the composite ceramic tube 2 into the channel hole of the orifice plate 1, with the small baffle 21 located in the outlet direction and the large baffle 22 located in the inlet direction. Then, fill the refractory ceramic fiber 3 between the composite ceramic tube 2, the baffle and the orifice plate 1 to cushion the shock and facilitate the release of stress. Subsequently, install the fixed pipe clamp 4 on the outside of the refractory ceramic fiber 3, specifically between the orifice plate 1 and the small baffle 21. Then, tighten it with the pipe clamp fixing bolt 5 to prevent the composite ceramic tube 2 from falling off. The pipe clamp fixing method facilitates the inspection and replacement of the composite ceramic tube 2.

[0024] In other embodiments of the present invention, the fixed pipe clamp 4 may be an integrated annular pipe clamp.

[0025] In other embodiments of the present invention, small stop edges 21 are provided at both ends of the composite ceramic tube 2 along the axial direction. In this case, fixed tube clamps 4 need to be provided on both sides of the orifice plate 1 .

[0026] In other embodiments of the present invention, the aforementioned damping ceramic nozzle can be adjusted to different sizes so as to be installed on other types of catalytic cracking equipment bodies.

[0027] The above is only a preferred embodiment of the present invention. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, makes any simple modifications, equivalent changes and modifications to the above embodiments based on the technical essence of the present invention, which still fall within the scope of the technical solution of the present invention.

Claims

1. A new type of shock absorbing ceramic nozzle, characterized in that: It comprises a composite ceramic tube (2), wherein both ends of the composite ceramic tube (2) along the axial direction are provided with retaining edges, refractory ceramic fibers (3) are provided between the composite ceramic tube (2), the retaining edges and the equipment body, and a fixed tube clamp (4) is provided outside the refractory ceramic fibers (3).

2. According to claim 1, a novel structure of a damping ceramic nozzle is characterized in that: With reference to the direction of the fluid, a small baffle (21) is provided at the outlet of the composite ceramic tube (2), and a large baffle (22) is provided at the inlet of the composite ceramic tube (2).

3. According to claim 2, a novel structure of a damping ceramic nozzle is characterized in that: The fixed pipe clamp (4) is arranged between the equipment body and the small stop edge (21).

4. According to claim 3, a novel structure of a damping ceramic nozzle is characterized in that: The fixed pipe clamp (4) comprises two half pipe clamps arranged opposite to each other, both ends of each half pipe clamp are provided with threaded holes, and pipe clamp fastening bolts (5) are arranged in the threaded holes.

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