High-resistance silicon nitride heating element

Abstract

The utility model discloses a high resistance silicon nitride heating element, which comprises a silicon nitride ceramic substrate, a heating tube and an electrode block, the silicon nitride ceramic substrate comprises a lower substrate and an upper substrate, opposite sides of the lower substrate and the upper substrate are respectively provided with a tube groove, two ends of the heating tube are respectively provided with a binding post, and the binding posts are arranged on the upper substrate and the lower substrate. The heating pipe and the binding post are arranged in the pipe groove, the binding post is arranged at the end of the lower base body and the end of the upper base body, through the arranged connecting piece, when the lower base body and the upper base body are connected, the two clamping grooves are spliced to form a complete rectangular groove, the rectangular frame strip can be installed in the rectangular groove formed by the two clamping grooves, and therefore the rectangular frame strip can be installed in the rectangular groove formed by the two clamping grooves. The lower base body and the upper base body are connected firmly, the problem that a large gap is generated due to the fact that the lower base body and the upper base body are separated is solved, the rectangular frame strips are conveniently taken out of the clamping grooves by shifting the fixing plates, and the connecting and fixing effect on the lower base body and the upper base body is conveniently relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating element technical field, concretely is a high resistance silicon nitride heating element. BACKGROUND

[0002] Silicon nitride ceramic heating element is widely used in liquid heating field due to high thermal efficiency, good electrical safety performance and fast temperature rise, and the silicon nitride ceramic electric heating element mainly comprises a silicon nitride base and a heating wire inside the silicon nitride base.

[0003] Through the search, the patent publication number CN218941355U discloses a hot-pressed silicon nitride ceramic electric heating element, which belongs to the technical field of electric heating elements, and specifically relates to a hot-pressed silicon nitride ceramic electric heating element, which comprises a ceramic base, an electrode block is arranged at the end of the ceramic base, a heating circuit is arranged inside the ceramic base, two groups of connecting wires matched with the heating circuit are inlaid inside the electrode block, and an insertion groove matched with the ceramic base is formed in the electrode block.

[0004] The above technical scheme divides the ceramic base into two parts, which facilitates the disassembly and assembly of the ceramic base and the heating pipe, but lacks a fixing structure between the two parts of the ceramic base, which leads to a large gap between the two parts of the ceramic base, so that the heating pipe cannot be in full contact with the ceramic base, affecting the heating effect, and dust, water vapor and other impurities can easily enter the gap and pollute the heating pipe. Therefore, a high resistance silicon nitride heating element is needed to solve the above problems. Utility model content

[0005] In view of the deficiencies of the prior art, the utility model aims to provide a high resistance silicon nitride heating element, which aims to solve the problem of lack of fixing structure between the two parts of the ceramic base of the high resistance silicon nitride heating element in the prior art, large gap between the two parts of the ceramic base, affecting the heating effect and easily causing pollution of the heating pipe.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a high resistance silicon nitride heating element, including silicon nitride ceramic base, heating tube and electrode block, the silicon nitride ceramic base includes lower base and upper base, the opposite side of lower base and upper base all is seted up with the pipe groove, the both ends of heating tube are provided with binding post, heating tube and binding post are placed in the pipe groove, the binding post is placed in the end of lower base and upper base, the both sides of lower base and upper base along the length direction are connected with the connecting piece, the connecting piece is used for the closed connection of lower base and upper base, be provided with positioning structure between lower base and upper base, one side of electrode block is seted up with the installation groove, and the one end of lower base and upper base is inserted into the installation groove of electrode block and is connected and fixed through the lock piece.

[0008] Preferably, the connecting piece includes a rectangular frame, and the two sides of the lower base and the upper base are provided with clamping grooves.

[0009] Preferably, the lower base and the upper base are provided with through grooves on one side, the through grooves are communicated with the clamping grooves, the rectangular frame is fixedly connected with an extension bar penetrating through the through grooves, the extension bar extends to the outside of the lower base and the upper base away from the rectangular frame, and a retaining plate is fixedly connected to the end of the extension bar, and the retaining plate is provided with a second fixing hole.

[0010] Preferably, the lower base and the upper base are provided with a first fixing hole at one end inside the installation groove, the inner wall of the installation groove is provided with a containing groove for containing the retaining plate, the side wall of the electrode block is provided with a through hole corresponding in position to the first fixing hole and the second fixing hole, and the lock piece includes a connecting plate, the connecting plate is fixedly connected with a first insertion rod penetrating through the through hole and the first fixing hole and a second insertion rod penetrating through the through hole and the second fixing hole, and the connecting plate is connected and fixed to the electrode block by a fixing bolt.

[0011] Preferably, the positioning structure includes positioning grooves provided on the side of the lower base close to the upper base, the positioning grooves are arranged in a circle outside the pipe groove, the upper base is fixedly connected with positioning convex strips on the side close to the lower base, the positioning convex strips are arranged in a circle outside the pipe groove, and when the lower base is butted against the upper base, the positioning convex strips are clamped into the positioning grooves in position.

[0012] Preferably, the cross sections of the positioning grooves and the positioning convex strips are all triangular structures, and the widths of the positioning grooves and the positioning convex strips gradually decrease in the direction from the upper base to the lower base.

[0013] Preferably, elastic conductive columns corresponding in position to the binding posts are embedded and installed on the inner wall of the installation groove, one end of the elastic conductive columns is electrically connected with a connecting terminal in the electrode block, and one end of the connecting terminal is fixedly connected with a connecting wire extending to the outside of the electrode block.

[0014] Compared with the prior art, the utility model has the advantages of

[0015] 1, the utility model discloses a connecting piece is seted, when the lower base body and the upper base body are connected, two clamping grooves splice and form a complete rectangular groove, and the rectangular frame strip can be installed in the rectangular groove formed by two clamping grooves, which is used for connecting the lower base body and the upper base body stably, avoids the problem that the lower base body and the upper base body are separated and form a large gap, and the rectangular frame strip is convenient to take out from the clamping groove by pushing the retaining plate, so that the connecting and fixing effect of the lower base body and the upper base body is conveniently released.

[0016] 2, the utility model discloses the positioning structure that sets up between the lower base body close to the upper base body, when the lower base body and the upper base body are connected, the positioning convex strip is clamped into the positioning recess, to guarantee the accuracy of the lower base body and the upper base body alignment connection, and a sealing band can be formed through the positioning convex strip and the positioning recess, to avoid dust, water vapor and the like from the connecting gap of the lower base body and the upper base body into the pollution heating tube. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is high resistance silicon nitride heating element whole structure schematic diagram;

[0018] Figure 2 It is silicon nitride ceramic base structure schematic diagram;

[0019] Figure 3 It is the through slot structure schematic diagram of silicon nitride ceramic base;

[0020] Figure 4 It is connecting piece structure schematic diagram;

[0021] Figure 5 It is the lower base body and the upper base body split structure schematic diagram;

[0022] Figure 6 It is the cross section structure schematic diagram of silicon nitride ceramic base and electrode block;

[0023] Figure 7 It is the lock piece structure schematic diagram.

[0024] In the drawing: 1, silicon nitride ceramic base;101, lower base body;102, upper base body;103, clamping groove;104, through slot;105, first fixed hole;106, pipe groove;107, positioning recess;108, positioning convex strip;2, connecting piece;201, rectangular frame strip;202, extension strip;203, retaining plate;204, second fixed hole;3, heating tube;4, terminal post;5, electrode block;501, installation groove;502, containing groove;6, elastic conductive column;7, connecting terminal;8, connecting wire;9, lock piece;901, connecting plate;902, first insertion rod;903, second insertion rod;904, fixed bolt. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Example: Please refer to Figures 1-7 This embodiment provides a high-resistance silicon nitride heating element, including a silicon nitride ceramic substrate 1, a heating element 3, and an electrode block 5. The silicon nitride ceramic substrate 1 includes a lower substrate 101 and an upper substrate 102. A groove 106 is formed on one side of each of the lower substrate 101 and the upper substrate 102. A terminal block 4 is provided at both ends of the heating element 3. The heating element 3 and the terminal block 4 are placed within the groove 106. The heating element 3 uses a high-resistance heating alloy wire, which has high heating efficiency. The terminal block 4 is located at the ends of the lower substrate 101 and the upper substrate 102. Connectors 2 are connected to both sides of the lower substrate 101 and the upper substrate 102 along their length. The connectors 2 are used to close and connect the lower substrate 101 and the upper substrate 102. A positioning structure is provided between the lower substrate 101 and the upper substrate 102. An installation groove 501 is formed on one side of the electrode block 5, and one end of the lower substrate 101 and the upper substrate 102 is inserted into it. The heating element 3 is installed in the mounting groove 501 of the electrode block 5 and is fixed by the locking member 9. The silicon nitride ceramic substrate 1 is divided into a lower substrate 101 and an upper substrate 102. The heating element 3 is installed between the lower substrate 101 and the upper substrate 102. The lower substrate 101 and the upper substrate 102 are connected to the electrode block 5 by the locking member 9. By releasing the fixing of the locking member 9, it is easy to separate the lower substrate 101 and the upper substrate 102 from the electrode block 5, and it is easy to disassemble and assemble the heating element 3 with the lower substrate 101 and the upper substrate 102, so as to replace the lower substrate 101 and the upper substrate 102. When the lower substrate 101 and the upper substrate 102 are connected, the lower substrate 101 and the upper substrate 102 are connected and stabilized by the connector 2, which improves the stability of the connection between the lower substrate 101 and the upper substrate 102, avoids gaps between the lower substrate 101 and the upper substrate 102 that would affect the heating effect, and avoids contamination of the heating element 3.

[0027] In this embodiment, as Figure 2 , Figure 3 and Figure 4As shown, the connecting piece 2 comprises a rectangular frame strip 201, and the two sides of the lower base 101 and the upper base 102 are provided with clamping grooves 103, the rectangular frame strip 201 is clamped in the clamping grooves 103 of the lower base 101 and the upper base 102, the clamping grooves 103 on the lower base 101 and the upper base 102 are in U-shaped structure, when the lower base 101 and the upper base 102 are connected, the two clamping grooves 103 are spliced to form a complete rectangular groove, and the rectangular frame strip 201 can be installed in the rectangular groove formed by the two clamping grooves 103, so as to stably connect the lower base 101 and the upper base 102, and avoid the problem that the lower base 101 and the upper base 102 are separated to form a large gap.

[0028] In the embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , one side of the lower base 101 and the upper base 102 is provided with a through groove 104 communicated with the clamping groove 103, and the extension strip 202 passing through the through groove 104 is fixedly connected to one side of the rectangular frame strip 201, the end of the extension strip 202 away from the rectangular frame strip 201 extends to the outside of the lower base 101 and the upper base 102 and is fixedly connected with the retaining plate 203, and the second fixing hole 204 is formed in the retaining plate 203, through the extension strip 202 and the retaining plate 203, the retaining plate 203 is arranged outside the lower base 101 and the upper base 102, and the rectangular frame strip 201 can be taken out from the clamping groove 103 by pulling the retaining plate 203, so that the connection and fixation of the lower base 101 and the upper base 102 can be conveniently released.

[0029] In the embodiment, as shown in Figure 3 , Figure 4 and Figure 7As shown, the lower base 101 and the upper base 102 are provided with a first fixing hole 105 at one end inside the mounting groove 501, the mounting groove 501 is provided with a containing groove 502 for accommodating the retaining plate 203 on the inner wall, the electrode block 5 is provided with a through hole corresponding to the first fixing hole 105 and the second fixing hole 204 on the side wall, the locking piece 9 includes a connecting plate 901, the connecting plate 901 is fixedly connected with a first inserting rod 902 passing through the through hole and the first fixing hole 105 and a second inserting rod 903 passing through the through hole and the second fixing hole 204, and the connecting plate 901 is connected and fixed with the electrode block 5 through a fixing bolt 904. When the lower base 101 and the upper base 102 are connected with the electrode block 5, the one end of the lower base 101 and the upper base 102 is inserted into the mounting groove 501, the corresponding retaining plate 203 is inserted into the containing groove 502, so that the first fixing hole 105 and the second fixing hole 204 are corresponded in position, and then the first inserting rod 902 of the locking piece 9 passes through the through hole and the first fixing hole 105 and the through hole and the second fixing hole 204, and the connecting plate 901 of the locking piece 9 is connected and fixed with the electrode block 5 through the fixing bolt 904, so as to connect and fix the lower base 101 and the upper base 102 with the electrode block 5.

[0030] In the embodiment, the positioning structure includes a positioning groove 107 provided on the side of the lower base 101 close to the upper base 102, and the positioning groove 107 is arranged on the outer side of the pipe groove 106, and the upper base 102 is fixedly connected with a positioning convex strip 108 on the side close to the lower base 101, and the positioning convex strip 108 is arranged on the outer side of the pipe groove 106. When the lower base 101 and the upper base 102 are connected, the positioning convex strip 108 is positioned and clamped into the positioning groove 107, so as to ensure the accuracy of the positioning connection of the lower base 101 and the upper base 102, and a sealing band is formed by the positioning convex strip 108 and the positioning groove 107, so as to prevent dust, water vapor and the like from entering the connection gap between the lower base 101 and the upper base 102 to pollute the heating pipe 3.

[0031] In the embodiment, as shown in the figure, Figure 5 The cross sections of the positioning groove 107 and the positioning convex strip 108 are triangular structures, and the widths of the positioning groove 107 and the positioning convex strip 108 gradually decrease along the direction from the upper base 102 to the lower base 101. Through the triangular shape design of the positioning groove 107 and the positioning convex strip 108, when the lower base 101 and the upper base 102 are connected, the end with smaller width of the positioning convex strip 108 enters the end with larger width of the positioning groove 107 first, so as to gradually guide and reduce the difficulty of initial positioning and improve the convenience of connection positioning.

[0032] In the embodiment, as shown in the figure, Figure 6As shown, the inner wall of the mounting groove 501 is embedded with an elastic conductive column 6 corresponding to the position of the terminal post 4, one end of the elastic conductive column 6 is placed in the electrode block 5 and electrically connected with a connecting terminal 7, one end of the connecting terminal 7 is fixedly connected with a connecting wire 8 extending to the outside of the electrode block 5, when the lower base body 101 and the upper base body 102 are connected with the electrode block 5, the terminal post 4 can exert pressure on the elastic conductive column 6 to make the elastic conductive column 6, the elastic conductive column 6 exerts reverse force on the terminal post 4 to make the terminal post 4 tightly contact with the elastic conductive column 6, thereby ensuring the conductive effect.

[0033] Working principle: when assembling the high-resistance silicon nitride heating element, the heating tube 3 is placed in the tube groove 106 of the lower base body 101, then the upper base body 102 is covered on the lower base body 101, the positioning convex strip 108 is aligned and clamped into the positioning groove 107 to ensure the accuracy of the alignment and connection of the lower base body 101 and the upper base body 102, and a sealing strip can be formed by the positioning convex strip 108 and the positioning groove 107 to avoid dust, water vapor and the like from entering the connection gap between the lower base body 101 and the upper base body 102 to pollute the heating tube 3, when the lower base body 101 and the upper base body 102 are connected, the two clamping grooves 103 are spliced to form a complete rectangular groove, the rectangular frame strip 201 is installed in the rectangular groove formed by the two clamping grooves 103 to stabilize the connection of the lower base body 101 and the upper base body 102, avoid the problem that the lower base body 101 and the upper base body 102 are separated to produce a large gap, ensure that the lower base body 101 and the upper base body 102 are in full contact with the heating tube 3 to operate the heating effect, then one end of the lower base body 101 and the upper base body 102 is inserted into the mounting groove 501 of the electrode block 5, the corresponding retaining plate 203 is inserted into the accommodating groove 502, so that the first fixing hole 105 and the second fixing hole 204 are correspondingly positioned, then the first inserting rod 902 of the locking piece 9 is inserted through the through hole and the first fixing hole 105, the through hole and the second fixing hole 204, the connecting plate 901 of the locking piece 9 is connected and fixed with the electrode block 5 through the fixing bolt 904, which is used to connect and fix the lower base body 101 and the upper base body 102 with the electrode block 5, the terminal post 4 can exert pressure on the elastic conductive column 6 to make the elastic conductive column 6, the elastic conductive column 6 exerts reverse force on the terminal post 4 to make the terminal post 4 tightly contact with the elastic conductive column 6, thereby ensuring the conductive effect, when the lower base body 101 and the upper base body 102 are disassembled and replaced, the locking piece 9 is disassembled and removed, the lower base body 101 and the upper base body 102 can be disassembled from the electrode block 5, then the rectangular frame strip 201 can be taken out of the clamping groove 103 by pushing the retaining plate 203, so as to conveniently release the connection and fixation of the lower base body 101 and the upper base body 102, facilitate the disassembly and assembly of the heating tube 3 with the lower base body 101 and the upper base body 102, thereby replacing the lower base body 101 and the upper base body 102.

[0034] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be implemented in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the present application.

Claims

1. A high-resistance silicon nitride heating element, comprising a silicon nitride ceramic substrate (1), a heating element (3), and an electrode block (5), characterized in that: The silicon nitride ceramic substrate (1) includes a lower substrate (101) and an upper substrate (102). A groove (106) is formed on one side of each of the lower substrate (101) and the upper substrate (102). A terminal block (4) is provided at both ends of the heating tube (3). The heating tube (3) and the terminal block (4) are placed within the groove (106). The terminal block (4) is located at the ends of the lower substrate (101) and the upper substrate (102). 102) Connectors (2) are connected to both sides along the length direction. The connectors (2) are used to close the lower base (101) and the upper base (102). A positioning structure is provided between the lower base (101) and the upper base (102). An installation groove (501) is opened on one side of the electrode block (5). One end of the lower base (101) and the upper base (102) are inserted into the installation groove (501) of the electrode block (5) and are connected and fixed by locking member (9). The connector (2) includes a rectangular frame strip (201), and both sides of the lower base (101) and the upper base (102) are provided with locking grooves (103). The rectangular frame strip (201) is locked into the locking grooves (103) of the lower base (101) and the upper base (102). The positioning structure includes a positioning groove (107) formed on the side of the lower base (101) near the upper base (102). The positioning groove (107) is arranged around the outside of the tube groove (106). A positioning protrusion (108) is fixedly connected to the side of the upper base (102) near the lower base (101). The positioning protrusion (108) is arranged around the outside of the tube groove (106). When the lower base (101) and the upper base (102) are connected, the positioning protrusion (108) is aligned and inserted into the positioning groove (107).

2. The high-resistance silicon nitride heating element according to claim 1, characterized in that: The lower base (101) and the upper base (102) are provided with a through groove (104) communicating with the slot (103) on one side. An extension strip (202) passing through the through groove (104) is fixedly connected to one side of the rectangular frame strip (201). The end of the extension strip (202) away from the rectangular frame strip (201) extends to the outside of the lower base (101) and the upper base (102) and is fixedly connected to a retaining plate (203). A second fixing hole (204) is provided on the retaining plate (203).

3. A high-resistance silicon nitride heating element according to claim 2, characterized in that: The lower base (101) and the upper base (102) are provided with a first fixing hole (105) at one end inside the mounting groove (501). The inner wall of the mounting groove (501) is provided with a receiving groove (502) for accommodating the fixing plate (203). The side wall of the electrode block (5) is provided with a through hole corresponding to the position of the first fixing hole (105) and the second fixing hole (204). The locking member (9) includes a connecting plate (901). The connecting plate (901) is fixedly connected with a first insert rod (902) that passes through the through hole and the first fixing hole (105) and a second insert rod (903) that passes through the through hole and the second fixing hole (204). The connecting plate (901) and the electrode block (5) are connected and fixed by fixing bolts (904).

4. A high-resistance silicon nitride heating element according to claim 1, characterized in that: The positioning groove (107) and the positioning protrusion (108) are both triangular in cross-section. The width of the positioning groove (107) and the positioning protrusion (108) gradually decreases from the upper base (102) to the lower base (101).

5. A high-resistance silicon nitride heating element according to claim 1, characterized in that: An elastic conductive post (6) corresponding to the position of the terminal block (4) is embedded in the inner wall of the mounting groove (501). One end of the elastic conductive post (6) is placed inside the electrode block (5) and electrically connected to a connection terminal (7). One end of the connection terminal (7) is fixedly connected to a connection wire (8) extending to the outside of the electrode block (5).

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