Sleeve socket type platinum thermistor temperature sensor

Abstract

The utility model provides a sleeve socket type platinum thermal resistor temperature sensor, which comprises a sleeve, a platinum thermal resistor temperature sensing element and a pressing sleeve, a slot with an opening at one end is arranged inside the sleeve, one end of the platinum thermal resistor temperature sensing element is inserted into the slot and is attached to the inner wall of the slot, one end of the pressing sleeve is connected with the opening end of the slot, a spring is arranged inside the pressing sleeve, one end of the spring abuts against the other end of the platinum thermal resistor temperature sensing element, and the other end of the spring abuts against the other end of the platinum thermal resistor temperature sensing element. The other end of the spring abuts against the inner wall of the other end of the pressing sleeve. According to the utility model, the length dimension of the platinum thermal resistance temperature sensing element can be reduced, that is, the production cost of the platinum thermal resistance temperature sensing element can be reduced, and in addition, the response speed and the sensitivity of the platinum thermal resistance temperature sensing element can be improved, so that the response speed and the sensitivity of the sleeve socket type platinum thermal resistance temperature sensor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensors, in particular to a sleeve and socket type platinum thermal resistance temperature sensor. Background Art

[0002] Platinum thermal resistor temperature sensors for measuring the temperature of the water coolant in the primary circuit of a pressurized water reactor nuclear power plant provide temperature signals for power measurement and safety protection. They have extremely high requirements in terms of safety, reliability, stability and integrity. In particular, they are required to respond quickly and accurately to the temperature changes of the coolant and be able to withstand high temperature, high pressure environment and high-speed flushing of the coolant. To this end, Chinese Patent Announcement No.: CN112781750A discloses a thermal resistor temperature sensor for a nuclear power plant. In the structure of the thermal resistor temperature sensor for a nuclear power plant, since the elastic member used to apply elastic force to the thermal resistor temperature sensing element is located between the reinforcing sleeve and the junction box, it is necessary to make the rear end of the thermal resistor temperature sensing element extend into the reinforcing sleeve, which has the disadvantages of large length and high production cost of the thermal resistor temperature sensing element. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a sleeve and socket type platinum thermistor temperature sensor, which can reduce the length of the platinum thermistor temperature sensing element, that is, it can reduce the production cost of the platinum thermistor temperature sensing element. In addition, it can also improve the response speed and sensitivity of the platinum thermistor temperature sensing element, so as to improve the response speed and sensitivity of the sleeve and socket type platinum thermistor temperature sensor.

[0004] The utility model provides a sleeve and socket type platinum thermal resistor temperature sensor, comprising a sleeve, a platinum thermal resistor temperature sensing element and a compression sleeve; a slot with an open end is arranged inside the sleeve, one end of the platinum thermal resistor temperature sensing element is inserted into the slot and the inner wall of the slot is in contact with each other, one end of the compression sleeve is connected to the open end of the slot, a spring is arranged inside the compression sleeve, one end of the spring abuts against the other end of the platinum thermal resistor temperature sensing element, and the other end of the spring abuts against the inner wall of the other end of the compression sleeve.

[0005] The utility model arranges the spring in the compression sleeve, and since one end of the spring abuts against the other end of the platinum thermal resistor temperature sensing element, and the other end of the spring abuts against the inner wall of the other end of the compression sleeve, that is, the other end of the platinum thermal resistor temperature sensing element only needs to extend to the compression sleeve, thereby reducing the length of the platinum thermal resistor temperature sensing element, that is, reducing the production cost of the platinum thermal resistor temperature sensing element; in addition, the response speed and sensitivity of the platinum thermal resistor temperature sensing element can be improved, so as to improve the response speed and sensitivity of the sleeve-socket type platinum thermal resistor temperature sensor.

[0006] In a possible embodiment, a conical screw sleeve portion is coaxially arranged on one end of the pressing sleeve, and a conical screw groove is arranged at the open end of the slot, and the screw sleeve portion is threadedly connected to the screw groove to fasten the pressing sleeve and the sleeve; by adopting this structure, after the screw sleeve portion is threadedly connected to the screw groove, one end of the pressing sleeve can be reliably fixed to the open end of the slot, and because the screw sleeve portion and the screw groove are both conical structures, it is convenient to thread the screw sleeve portion into the screw groove, that is, it has the advantage of convenient assembly of the pressing sleeve and the sleeve.

[0007] In a possible implementation, a first annular step is provided on the inner wall of the slot, and a second annular step is provided on the outer wall of the platinum thermal resistor temperature sensing element, and the second annular step abuts against the first annular step; by adopting this structure, under the cooperation of the first annular step and the second annular step, the platinum thermal resistor temperature sensing element can be reliably axially supported.

[0008] In a possible implementation, the inner wall of the slot away from the pressing sleeve forms a conical structure, and one end of the platinum thermal resistor temperature sensing element forms a conical portion that matches the conical structure on the inner wall of the slot, and the outer peripheral wall of the conical portion is in contact with the inner wall of the slot; by adopting this structure, the heat absorbed by the end of the sleeve away from the pressing sleeve can be more reliably transferred to the end of the platinum thermal resistor temperature sensing element, that is, the end of the sleeve away from the pressing sleeve can better transfer heat to the end of the platinum thermal resistor temperature sensing element to achieve the minimum contact heat transfer thermal resistance, so that the temperature of the external environment medium can be quickly transferred to the platinum thermal resistor temperature sensing element.

[0009] In a possible embodiment, the sleeve and socket type platinum thermistor temperature sensor also includes a flexible joint assembly, a heat dissipation sleeve and an electrical connector, one end of the flexible joint assembly is threadedly connected to the other end of the compression sleeve, one end of the heat dissipation sleeve is threadedly connected to the other end of the flexible joint assembly, one end of the electrical connector is threadedly connected to the other end of the heat dissipation sleeve, and the connecting wire of the platinum thermistor temperature sensing element passes through the compression sleeve, the flexible joint assembly and the heat dissipation sleeve and is electrically connected to the electrical connector; by adopting this structure, the electrical connector can be reliably and conveniently assembled on the other end of the compression sleeve, and due to the effect of the heat dissipation sleeve, the heat from the sleeve, the compression sleeve and the flexible joint assembly can be effectively prevented from being transferred to the electrical connector, thereby effectively preventing the electrical connector from being overheated and damaged.

[0010] In a possible embodiment, a plurality of annular heat dissipation grooves are provided on the outer peripheral wall of the heat dissipation sleeve and are spaced apart along the axial direction of the heat dissipation sleeve; by adopting this structure, the contact area between the heat dissipation sleeve and the air can be increased to improve the heat dissipation efficiency of the heat dissipation sleeve, thereby further preventing heat from being transferred to the electrical connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a cross-sectional structural schematic diagram of the utility model;

[0012] Figure 2 for Figure 1 The schematic diagram of the structure after the enlargement of A in the middle;

[0013] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point B. DETAILED DESCRIPTION

[0014] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0015] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0016] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0017] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] See also Figure 1-3 As shown, the embodiment of the present application discloses a sleeve and socket type platinum thermal resistor temperature sensor, comprising a sleeve 1, a platinum thermal resistor temperature sensing element 2 and a compression sleeve 3; a slot 11 with an open end is provided inside the sleeve 1, one end of the platinum thermal resistor temperature sensing element 2 is inserted into the slot 11 and the inner wall of the slot 11 is in contact with each other, one end of the compression sleeve 3 is connected to the open end of the slot 11, a spring 4 is provided inside the compression sleeve 3, one end of the spring 4 is abutted against the other end of the platinum thermal resistor temperature sensing element 2, and the other end of the spring 4 is abutted against the inner wall of the other end of the compression sleeve 3.

[0019] A conical screw sleeve portion 31 is coaxially arranged on one end of the pressing sleeve 3, and a conical screw groove 12 is arranged at the open end of the insertion slot 11. The screw sleeve portion 31 is threadedly connected with the screw groove 12 to fasten the pressing sleeve 3 and the sleeve 1. By adopting this structure, after the screw sleeve portion is threadedly connected with the screw groove, one end of the pressing sleeve can be reliably fixed together with the open end of the insertion slot, and because the screw sleeve portion and the screw groove are both conical structures, it is convenient to thread the screw sleeve portion into the screw groove, that is, it has the advantage of convenient assembly of the pressing sleeve and the sleeve.

[0020] A first annular step 13 is provided on the inner wall of the slot 11, and a second annular step 21 is provided on the outer wall of the platinum thermal resistor temperature sensing element 2, and the second annular step 21 abuts against the first annular step 13; by adopting this structure, under the cooperation of the first annular step and the second annular step, the platinum thermal resistor temperature sensing element can be reliably axially supported.

[0021] The inner side wall of the slot 11 away from the pressing sleeve 3 forms a conical structure, and one end of the platinum thermal resistor temperature sensing element 2 forms a conical portion 22 that matches the conical structure on the inner wall of the slot 11, and the outer peripheral wall of the conical portion 22 is in contact with the inner side wall of the slot 11; by adopting this structure, the heat absorbed by the end of the sleeve away from the pressing sleeve can be more reliably transferred to the end of the platinum thermal resistor temperature sensing element, that is, the end of the sleeve away from the pressing sleeve can better transfer heat to the end of the platinum thermal resistor temperature sensing element to achieve the minimum contact heat transfer thermal resistance, so that the temperature of the external environment medium can be quickly transferred to the platinum thermal resistor temperature sensing element.

[0022] The sleeve and socket type platinum thermal resistor temperature sensor also includes a flexible joint assembly 7, a heat dissipation sleeve 5 and an electrical connector 6. One end of the flexible joint assembly 7 is threadedly connected to the other end of the compression sleeve 3, one end of the heat dissipation sleeve 5 is threadedly connected to the other end of the flexible joint assembly 7, one end of the electrical connector 6 is threadedly connected to the other end of the heat dissipation sleeve 5, and the connecting line of the platinum thermal resistor temperature sensing element 2 passes through the compression sleeve 3, the flexible joint assembly 7 and the heat dissipation sleeve 5 and is electrically connected to the electrical connector 6. By adopting this structure, the electrical connector can be reliably and conveniently assembled on the other end of the compression sleeve, and due to the effect of the heat dissipation sleeve, the heat from the sleeve, the compression sleeve and the flexible joint assembly can be effectively prevented from being transferred to the electrical connector, thereby effectively preventing the electrical connector from being overheated and damaged.

[0023] The outer wall of the heat dissipation sleeve 5 is provided with a plurality of annular heat dissipation grooves 51 spaced apart along the axial direction of the heat dissipation sleeve 5; by adopting this structure, the contact area between the heat dissipation sleeve and the air can be increased to improve the heat dissipation efficiency of the heat dissipation sleeve, thereby further preventing heat from being transferred to the electrical connector.

[0024] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A sleeve-and-socket type platinum thermal resistor temperature sensor, comprising a sleeve (1), a platinum thermal resistor temperature sensing element (2) and a compression sleeve (3); a slot (11) with an open end is provided inside the sleeve (1), one end of the platinum thermal resistor temperature sensing element (2) is inserted into the slot (11) and the inner wall of the slot (11) is in contact with each other, and one end of the compression sleeve (3) is connected to the open end of the slot (11), characterized in that: A spring (4) is arranged inside the pressing sleeve (3), one end of the spring (4) abuts against the other end of the platinum thermal resistor temperature sensing element (2), and the other end of the spring (4) abuts against the inner wall of the other end of the pressing sleeve (3).

2. The sleeve and socket type platinum thermal resistance temperature sensor according to claim 1, characterized in that: A conical screw sleeve portion (31) is coaxially arranged on one end of the pressing sleeve (3), and a conical screw connection groove (12) is arranged at the open end of the slot (11). The screw sleeve portion (31) and the screw connection groove (12) are threadedly connected to fasten the pressing sleeve (3) and the sleeve (1).

3. The sleeve and socket type platinum thermal resistance temperature sensor according to claim 1 or 2, characterized in that: A first annular step (13) is provided on the inner wall of the slot (11), and a second annular step (21) is provided on the outer wall of the platinum thermal resistor temperature sensing element (2), wherein the second annular step (21) abuts against the first annular step (13).

4. The sleeve and socket type platinum thermal resistance temperature sensor according to claim 3, characterized in that: The inner wall of the slot (11) at one end away from the pressing sleeve (3) forms a conical structure, and one end of the platinum thermal resistor temperature sensing element (2) forms a conical portion (22) that matches the conical structure on the inner wall of the slot (11), and the outer peripheral wall of the conical portion (22) is in contact with the inner wall of the slot (11).

5. The sleeve and socket type platinum thermal resistance temperature sensor according to claim 1, 2 or 4, characterized in that: The sleeve and socket type platinum thermal resistor temperature sensor also includes a flexible joint assembly (7), a heat dissipation sleeve (5) and an electrical connector (6); one end of the flexible joint assembly (7) is threadedly connected to the other end of the compression sleeve (3); one end of the heat dissipation sleeve (5) is threadedly connected to the other end of the flexible joint assembly (7); one end of the electrical connector (6) is threadedly connected to the other end of the heat dissipation sleeve (5); and a connecting line of the platinum thermal resistor temperature sensing element (2) passes through the compression sleeve (3), the flexible joint assembly (7) and the heat dissipation sleeve (5) and is electrically connected to the electrical connector (6).

6. The sleeve and socket type platinum thermal resistance temperature sensor according to claim 5, characterized in that: The outer peripheral wall of the heat dissipation sleeve (5) is provided with a plurality of annular heat dissipation grooves (51) distributed at intervals along the axial direction of the heat dissipation sleeve (5).

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