A high-temperature-resistant and anti-fouling ceramic ignition needle and its preparation method

Abstract

The present invention belongs to the technical field of ignition needles, and specifically relates to a high-temperature resistant and anti-fouling ceramic ignition needle and a preparation method thereof, comprising an ignition guide column, the outer lower end of the ignition guide column is sleeved with a high-temperature resistant shell, a filling layer is arranged between the ignition guide column and the high-temperature resistant shell, the outer movable sleeve of the high-temperature resistant shell is provided with a positioning disk, the lower side of the positioning disk is connected to a guide sleeve, the outer side of the high-temperature resistant shell is provided with an external thread, the inner cavity of the guide sleeve is provided with an internal thread, the high-temperature resistant shell is threadedly connected to the guide sleeve, the outer side of the high-temperature resistant shell is threadedly connected with a locking nut, the upper end of the locking nut is fitted with the upper end of the guide sleeve, and when the present invention is installed, the length of the protruding end of the ceramic ignition needle can be adjusted by adjusting the length of the ignition guide column and the high-temperature resistant shell extending out of the positioning disk, so that it can have more applicable space.

Description

Technical Field

[0001] The present invention relates to the technical field of ignition needles, in particular to a high-temperature resistant and anti-fouling ceramic ignition needle and a preparation method thereof. Background Art

[0002] Gas stove ignition methods are primarily divided into piezoelectric ceramic ignition and electric pulse ignition. A pulse igniter is a pulsed high-frequency oscillator composed of electronic components. The high-frequency voltage generated by the oscillator is boosted to a high voltage of 15kV via a step-up transformer. A piezoelectric igniter is a manual ignition device based on the piezoelectric effect and manufactured using piezoelectric ceramics as a dielectric. It generates a transient high-voltage current by violently colliding two piezoelectric ceramics (when a button is pressed). Both the high-voltage motor and the high-voltage current generated by the pulse igniter are discharged through the ignition needle, and the resulting spark ignites the gas on the stove.

[0003] There are mainly metal ignition needles and ceramic ignition needles. Since metal is easily oxidized and rusted at high temperatures, and ceramic ignition needles have the advantages of exquisite and beautiful shape, durability, high temperature resistance, and good anti-fouling effect, metal ignition needles have gradually begun to be replaced by ceramic ignition needles. After the ignition needle is damaged, when replacing a new ignition needle, it is necessary to consider the height of the protruding end of the ignition needle. When measuring, the user may choose an unusable ignition needle due to measurement errors. Therefore, an ignition needle with an adjustable protruding end height has more applicable space. Summary of the Invention

[0004] The object of the present invention is to provide a high-temperature resistant and anti-fouling ceramic ignition needle and a preparation method thereof, so as to solve the problem that the length of the extended end of the existing ceramic ignition needle cannot be adjusted as mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-temperature resistant and anti-fouling ceramic ignition needle, comprising an ignition guide column, the outer lower end of the ignition guide column is provided with a high-temperature resistant shell, a filling layer is provided between the ignition guide column and the high-temperature resistant shell, the outer movable sleeve of the high-temperature resistant shell is provided with a positioning plate, the lower side of the positioning plate is connected to a guide sleeve, the outer side of the high-temperature resistant shell is provided with an external thread, the inner cavity of the guide sleeve is provided with an internal thread, the high-temperature resistant shell is threadedly connected to the guide sleeve, the outer side of the high-temperature resistant shell is threadedly connected with a locking nut, the upper end of the locking nut is fitted with the upper end of the guide sleeve, and the end of the ignition guide column extending into the high-temperature resistant shell is connected to a high-voltage wire through a wire.

[0006] Preferably, the guide sleeve includes a ceramic sleeve and an internal threaded sleeve, the lower end of the ceramic sleeve is inserted into the inner cavity of the internal threaded sleeve, the inner diameter of the ceramic sleeve is the same as the outer diameter of the high temperature resistant shell, and a fixing clamping groove is opened on the outer side of the internal threaded sleeve.

[0007] Preferably, a terminal penetrating the high-temperature resistant shell is provided on the lower side of the filling layer, the terminal is connected to the ignition guide post via a wire, and the high-voltage wire is connected to the terminal on the side close to the filling layer.

[0008] Preferably, the high temperature resistant shell includes a ceramic shell and a hollow threaded column, and the lower end of the ceramic shell is inserted into the inner cavity of the hollow threaded column.

[0009] Preferably, a positioning groove is provided on the lower side of the inner cavity of the ceramic shell, and a positioning ring is provided on the outer side of the ignition guide column, and the positioning ring corresponds to the positioning groove.

[0010] A method for preparing a high-temperature resistant and anti-fouling ceramic ignition needle. The method for preparing the high-temperature resistant and anti-fouling ceramic ignition needle is as follows:

[0011] Step 1: Sinter and form the high-temperature resistant shell, integrate the positioning plate and the guide sleeve into a single piece, and then perform rough machining on the length of the high-temperature resistant shell and the positioning plate;

[0012] Step 2: Insert the ignition guide pin into the inner cavity of the high-temperature resistant shell, then add filler into the inner cavity of the high-temperature resistant shell and sinter it. The filler is formed into a filling layer. The length of the high-temperature resistant shell and the positioning plate is fine-machined, and the outer side of the high-temperature resistant shell and the inner and outer sides of the guide sleeve are randomly fine-machined.

[0013] Step 3: Assemble the high temperature resistant housing, guide sleeve and locking nut.

[0014] Preferably, the main materials of the high-temperature resistant shell, guide sleeve and positioning plate include 10-15 parts of silicon nitride, 12-17 parts of aluminum oxide, 4-6 parts of boron nitride, 30-40 parts of silicon carbide, 3-4 parts of additives and 1-2 parts of sintering aids by mass.

[0015] Preferably, the filling layer comprises mainly materials including 30-40 parts by mass of silicon nitride, 3-4 parts by mass of additives, and 1-2 parts by mass of sintering aids.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention screws the high-temperature resistant shell and the guide sleeve together, and then arranges a positioning plate on the upper side of the guide sleeve, so that the length of the ignition guide column and the high-temperature resistant shell extending out of the positioning plate can be adjusted. When installing the device, the length of the protruding end of the ceramic ignition needle can be adjusted by adjusting the length of the ignition guide column and the high-temperature resistant shell extending out of the positioning plate, thereby allowing it to have more applicable space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the main view of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the guide sleeve of the present invention;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the high-temperature resistant housing of the present invention.

[0022] In the figure: 1 ignition guide column, 2 high temperature resistant shell, 21 ceramic shell, 22 hollow threaded column, 23 positioning groove, 3 guide sleeve, 31 ceramic sleeve, 32 internal thread sleeve, 33 fixing clamp groove, 4 positioning plate, 5 locking nut, 6 high voltage wire, 7 terminal, 8 filling layer. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0025] Example:

[0026] See also Figure 1-4The present invention provides a technical solution: a high-temperature resistant and anti-fouling ceramic ignition needle, comprising an ignition guide column 1, the outer lower end of the ignition guide column 1 is sleeved with a high-temperature resistant shell 2, the high-temperature resistant shell 2 comprises a ceramic shell 21 and a hollow threaded column 22, the lower end of the ceramic shell 21 is inserted into the inner cavity of the hollow threaded column 22, the ceramic shell 21 is made of high-temperature resistant ceramic, and the hollow threaded column 22 is made of metal. After the device is installed, the hollow threaded column 22 is located below the positioning disk 4, which can avoid high-temperature burning. A filling layer 8 is provided between the ignition guide column 1 and the high-temperature resistant shell 2, and the filling layer 8 is used to fix the ignition guide column 1 to the high-temperature resistant shell 2. The outer movable sleeve of the high-temperature resistant shell 2 is provided with a positioning disk 4. After the device is installed, the positioning disk 4 and the ignition guide column 1 and the high-temperature resistant shell 2 extend out of the positioning disk 4 as the protruding end, and the lower side of the positioning disk 4 is connected with a guide sleeve 3, which comprises a ceramic sleeve 31 and an internal threaded sleeve 32. The ceramic sleeve 3 The lower end of 1 is inserted into the inner cavity of the internal threaded sleeve 32. The material of the ceramic sleeve 31 is high-temperature resistant ceramic, and the internal threaded sleeve 32 is metal. The internal threaded sleeve 32 is located below the positioning plate 4 to avoid high-temperature burning. The inner diameter of the ceramic sleeve 31 is the same as the outer diameter of the ceramic shell 21, which can prevent dust from seeping into the gap between the ceramic shell 21 and the ceramic sleeve 31. The outer side of the high-temperature resistant shell 2 is provided with an external thread, and the inner cavity of the guide sleeve 3 is provided with an internal thread. The high-temperature resistant shell 2 is screwed with the guide sleeve 3. The internal thread is arranged on the inner side of the internal threaded sleeve 32, and the external thread is arranged on the outer side of the hollow threaded column 22. The ceramic material is relatively brittle, and metal material is used for threaded connection here to avoid cracking at the connection between the high-temperature resistant shell 2 and the guide sleeve 3. The outer side of the high-temperature resistant shell 2 is screwed with a locking nut 5, and the upper end of the locking nut 5 is fitted with the upper end of the guide sleeve 3. One end of the ignition guide column 1 extending into the high-temperature resistant shell 2 is connected to a high-voltage wire 6 through a wire.

[0027] A fixing clip groove 33 is provided on the outside of the internal threaded sleeve 32. When installing this device, the gas stove's buckle can be clipped into the fixing clip groove 33 to fix the device. The fixing clip groove 33 is arranged on the outside of the internal threaded sleeve 32. On the one hand, the internal threaded sleeve 32 is made of metal and can maintain sufficient toughness. On the other hand, the distance between the internal threaded sleeve 32 and the positioning plate 4 is fixed, that is, the distance between the fixing clip groove 33 and the positioning plate 4 is fixed, thereby facilitating the matching installation of the fixing clip groove 33 of this device and the buckle of the gas stove.

[0028] A terminal 7 is provided on the lower side of the filling layer 8, which passes through the high-temperature resistant shell 2. The terminal 7 is connected to the ignition guide column 1 through a wire, and the high-voltage wire 6 is connected to the terminal 7 on the side close to the filling layer 8. An insulating plastic layer needs to be provided on the outside of the high-voltage wire 6, and the filling layer 8 needs to be fired at a high temperature. Therefore, during firing, the high-voltage wire 6 is instinctively connected to the ignition guide column 1. At this time, it is necessary to transfer through the terminal 7, so as to facilitate the later connection of the terminal 7 and the high-voltage wire 6.

[0029] A positioning groove 23 is provided on the lower side of the inner cavity of the ceramic shell 21, and a positioning ring is provided on the outer side of the ignition guide column 1. The positioning ring corresponds to the positioning groove 23. This method is used to control the length of the part of the upper end of the ignition guide column 1 extending out of the ceramic shell 21.

[0030] A method for preparing a high-temperature resistant and anti-fouling ceramic ignition needle. The method for preparing the high-temperature resistant and anti-fouling ceramic ignition needle is as follows:

[0031] Step 1: Sinter the ceramic shell 21 of the high-temperature resistant shell 2, then apply pressure to press the ceramic shell 21 and the hollow threaded column 22 into one piece, sinter the positioning plate 4 and the ceramic sleeve 31 of the guide sleeve 3 into an integrated piece, then apply pressure to press the internal threaded sleeve 32 and the ceramic sleeve 31 into one piece, and perform rough machining on the length of the high-temperature resistant shell 2 and the positioning plate 4 so that their heights initially meet the set standards;

[0032] Step 2: Insert the ignition guide pin 1 into the inner cavity of the high-temperature resistant shell 2, then add filler into the inner cavity of the high-temperature resistant shell 2 and sinter it. The filler is formed into a filling layer 8. The height of the high-temperature resistant shell 2 and the positioning plate 4 are fine-machined to make them consistent with the set standard. Then, the outer side of the high-temperature resistant shell 2 and the inner and outer sides of the guide sleeve 3 are fine-machined to make their inner and outer diameters consistent with the set standard.

[0033] Step 3: Assemble the high temperature resistant housing 2, the guide sleeve 3 and the locking nut 5.

[0034] The main materials of the high temperature resistant shell 2, the guide sleeve 3 and the positioning plate 4 include 10 to 15 parts of silicon nitride, 12 to 17 parts of aluminum oxide, 4 to 6 parts of boron nitride, 30 to 40 parts of silicon carbide, 3 to 4 parts of additives and 1 to 2 parts of sintering aids by mass.

[0035] The filling layer 8 mainly comprises materials including 30-40 parts by mass of silicon nitride, 3-4 parts by mass of additives, and 1-2 parts by mass of sintering aids.

[0036] Working principle: Loosen the locking nut 5, then insert the device into the mounting hole of the gas stove from the top, and make the positioning plate 4 fit with the gas stove, then fix the guide sleeve 3 of the device with the buckle of the gas stove, and then rotate the high-temperature resistant shell 2 to adjust the distance of the high-temperature resistant shell 2 extending from the positioning plate 4. After the distance is adjusted, tighten the locking nut 5.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure signs in the claims should not be regarded as limiting the claims involved.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant and anti-fouling ceramic ignition needle, comprising an ignition guide pin (1), characterized in that: The lower end of the outer side of the ignition guide column (1) is sleeved with a high-temperature resistant shell (2), a filling layer (8) is provided between the ignition guide column (1) and the high-temperature resistant shell (2), the outer movable sleeve of the high-temperature resistant shell (2) is provided with a positioning plate (4), the lower side of the positioning plate (4) is connected to the guide sleeve (3), the outer side of the high-temperature resistant shell (2) is provided with an external thread, the inner cavity of the guide sleeve (3) is provided with an internal thread, the high-temperature resistant shell (2) and the guide sleeve (3) are screwed together, the outer side of the high-temperature resistant shell (2) is screwed with a locking nut (5), the upper end of the locking nut (5) is fitted with the upper end of the guide sleeve (3), and one end of the ignition guide column (1) extending into the high-temperature resistant shell (2) is connected to a high-voltage wire (6) through a wire; The guide sleeve (3) comprises a ceramic sleeve (31) and an internal thread sleeve (32), the lower end of the ceramic sleeve (31) is inserted into the inner cavity of the internal thread sleeve (32), the inner diameter of the ceramic sleeve (31) is the same as the outer diameter of the high temperature resistant shell (2), and a fixing clamping groove (33) is provided on the outer side of the internal thread sleeve (32); A terminal (7) penetrating the high-temperature resistant housing (2) is provided on the lower side of the filling layer (8), the terminal (7) being connected to the ignition guide post (1) via a wire, and the high-voltage wire (6) being connected to the terminal (7) on the side close to the filling layer (8); The high-temperature resistant housing (2) comprises a ceramic housing (21) and a hollow threaded column (22), wherein the lower end of the ceramic housing (21) is inserted into the inner cavity of the hollow threaded column (22); A positioning groove (23) is provided on the lower side of the inner cavity of the ceramic shell (21), and a positioning ring is provided on the outer side of the ignition guide column (1), and the positioning ring corresponds to the positioning groove (23).

2. A method for preparing the high-temperature resistant and anti-fouling ceramic ignition needle according to claim 1, characterized in that: The preparation method of the high temperature resistant and anti-fouling ceramic ignition needle is as follows: Step 1: sintering the high-temperature resistant shell (2), sintering the positioning plate (4) and the guide sleeve (3) into an integrated form, and then rough-machining the length of the high-temperature resistant shell (2) and the positioning plate (4); Step 2: Insert the ignition guide pin (1) into the inner cavity of the high-temperature resistant shell (2), then add filler into the inner cavity of the high-temperature resistant shell (2) and sinter it, the filler is formed into a filling layer (8), the height of the high-temperature resistant shell (2) and the positioning plate (4) is fine-machined, and then the outer side of the high-temperature resistant shell (2) and the inner and outer sides of the guide sleeve (3) are fine-machined; Step 3: Assemble the high temperature resistant housing (2), the guide sleeve (3) and the locking nut (5).

3. The method for preparing a high-temperature resistant and anti-fouling ceramic ignition needle according to claim 2, characterized in that: The main materials of the high-temperature resistant housing (2), the guide sleeve (3) and the positioning plate (4) include, by mass, 10 to 15 parts of silicon nitride, 12 to 17 parts of aluminum oxide, 4 to 6 parts of boron nitride, 30 to 40 parts of silicon carbide, 3 to 4 parts of additives and 1 to 2 parts of sintering aids.

4. The method for preparing a high-temperature resistant and anti-fouling ceramic ignition needle according to claim 2, characterized in that: The main materials of the filling layer (8) include 30-40 parts by mass of silicon nitride, 3-4 parts by mass of additives, and 1-2 parts by mass of sintering aids.

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