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CN-224202574-U - Sensor device with function of preventing sensing needle torsion loosening and loosening

CN224202574UCN 224202574 UCN224202574 UCN 224202574UCN-224202574-U

Abstract

The utility model discloses a sensor device with a function of preventing a sensing needle from twisting, loosening and loosening, which belongs to the technical field of sensors of combustion equipment and comprises a sensing needle, a ceramic insulator, a metal support plate and a wire connecting end, wherein the top end of the sensing needle is used for receiving signals, a symmetrical limiting block is arranged in the middle of a vertical rod of the sensing needle, one end of the ceramic insulator is provided with a limiting hole, the other end of the ceramic insulator is provided with a round hole, a plurality of convex ribs are arranged on the inner wall of the round hole, the limiting block of the sensing needle is matched with the limiting hole, the convex ribs are in interference fit with the lower surface of the sensing needle, the metal support plate is used for installing and fixing the ceramic insulator, and the wire connecting end is electrically connected with the bottom end of the sensing needle and used for transmitting signals, and is physically fixed to the sensing needle through the limiting hole and the convex rib structure of the ceramic insulator. The convex ribs are in interference fit with the sensing needle, so that the sensing needle is prevented from rotating, loosening or loosening due to torsion or vibration.

Inventors

  • DING JINZHI

Assignees

  • 宁波恒辉传感科技有限公司

Dates

Publication Date
20260505
Application Date
20250527

Claims (6)

  1. 1. A sensor device with anti-rattle and release of a sensing needle, comprising: The induction needle (1) is used for receiving signals at the top end, and symmetrical limiting blocks (5) are arranged in the middle of the vertical rod of the induction needle (1); The ceramic insulator (2) is provided with a limiting hole (6) at one end and a round hole (7) at the other end, a plurality of convex ribs (8) are fixed on the inner wall of the round hole (7), the limiting block (5) of the induction needle (1) is matched with the limiting hole (6), and the convex ribs (8) are in interference fit with the lower surface of the induction needle (1); A metal bracket plate (3) for mounting and fixing the ceramic insulator (2); and the lead connecting end (4) is electrically connected with the bottom end of the induction needle (1) and is used for transmitting signals.
  2. 2. The sensor device with the function of preventing the torsion loosening and loosing of the sensing needle according to claim 1 is characterized in that the depth of the limiting hole (6) is 15-30mm, and the length of the inner convex rib (8) of the round hole (7) is 8-12mm.
  3. 3. Sensor device with protection against twisting loosening and loosing of sensing needle according to claim 1, characterized in that the stopper (5) on the sensing needle (1) is formed by flattening.
  4. 4. A sensor device with resistance to twisting loosening and loosing of sensing needle according to claim 1, characterized in that the ribs (8) form a circular restraining area with a diameter smaller than 0.12-0.2mm of sensing needle in the circular hole (7).
  5. 5. A sensor device with resistance to twisting loosening and coming-off of a sensing needle as claimed in claim 1, wherein the upper end of the wire connecting end (4) is in contact with the bottom end face of the ceramic insulator (2).
  6. 6. A sensor device with the function of preventing the torsion loosening and loosing of a sensing needle according to claim 1, wherein the lower end of the limiting block (5) is contacted with the bottom wall of the limiting hole (6).

Description

Sensor device with function of preventing sensing needle torsion loosening and loosening Technical Field The utility model relates to the technical field of combustion equipment sensors, in particular to a sensor device with a function of preventing a sensing needle from twisting, loosening and loosening. Background In order to firmly fix the induction needle and the ceramic insulator together in the production process, the sensor device for the combustion equipment is usually operated by adopting a scheme of filling, bonding and then high-temperature curing of high-temperature inorganic glue, but the high-temperature inorganic glue is relatively high in price when purchased, is relatively high in brittleness after curing, not resistant to impact, relatively poor in water resistance and easy to absorb moisture, water vapor, oil drops and the like can be generated in the operation process of the combustion equipment, the water vapor and the oil drops can slide to the inorganic glue along the induction needle, the inorganic glue can be invalid after long time, so that the looseness of the induction needle affects the function of the sensor device, in addition, the inorganic glue is in a liquid state before curing, the induction needle and the ceramic insulator are required to be moved to an oven for curing after being filled, the process also leads to the phenomenon of loosening and shifting of the cooperation of two accessories, and the reworking cannot be performed after the curing is completed. Disclosure of utility model The utility model aims to solve the problems that the induction needle is easy to loosen and the signal is misjudged in the background technology. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The sensor device comprises an induction needle, a ceramic insulator, a metal support plate and a wire connecting end, wherein the induction needle is used for receiving signals, symmetrical limiting blocks are arranged in the middle of a vertical rod of the induction needle, one end of the ceramic insulator is provided with a limiting hole, the other end of the ceramic insulator is provided with a round hole, a plurality of protruding ribs are fixed on the inner wall of the round hole, the limiting blocks of the induction needle are matched with the limiting hole, the protruding ribs are in interference fit with the lower surface of the induction needle, the metal support plate is used for installing and fixing the ceramic insulator, and the wire connecting end is electrically connected with the bottom end of the induction needle and used for transmitting signals. Preferably, the depth of the limiting hole is 15-30mm, and the length of the convex rib in the round hole is 8-12mm. Preferably, the limiting block on the sensing needle is formed by flattening. Preferably, the ribs form a circular constraint area with the diameter smaller than 0.12-0.2mm of the sensing needle in the circular hole. Preferably, the upper end of the wire connection end is in contact with the bottom end surface of the ceramic insulator. Preferably, the lower end of the limiting block is contacted with the bottom wall of the limiting hole. Compared with the prior art, the utility model has the following beneficial effects: The sensing needle is physically fixed through the limiting hole and the convex rib structure of the ceramic insulator. The convex ribs are in interference fit with the sensing needle, so that the sensing needle is prevented from rotating, loosening or loosening due to torsion or vibration; The glue-free design avoids the erosion of water vapor and oil drops to the cementing part, and the convex ribs and the limiting hole structures of the ceramic insulator are high-temperature-resistant and impact-resistant solid structures, so that the ceramic insulator is suitable for the complex working conditions of high temperature, high humidity and multiple greasy dirt of combustion equipment, and the service life is prolonged. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic diagram of the overall structure of the present utility model. FIG. 2 is a schematic view showing the internal structure of the ceramic insulator of the present utility model. Fig. 3 is an enlarged schematic view of fig. 2a in accordance with the present utility model. Fig. 4 is an enlarged schematic view of fig. 2B in accordance with the present utility model. The figure number shows that the induction needle is 1, the induction needle is 2, the ceramic insulator is 3, the metal s