Waterproof platinum resistor temperature sensor

Abstract

The utility model belongs to the technical field of sensor installation, and particularly relates to a waterproof platinum resistor temperature sensor which comprises an installation piece which is connected with a sealing piece and a jacking piece. According to the utility model, through the arrangement of the mounting piece, the sealing piece and the jacking piece, the sealing piece can be pressed downwards by the second conical part during thermal expansion by virtue of the second conical part on the pressing disc and the third conical part on the cover cap under the condition of temperature rise or temperature reduction, so that the contact extrusion force with mounting equipment is improved; and the third conical part can downwards extrude the sealing element, so that the extrusion force is increased, the sealing effect of heating and cooling equipment installation can be improved, and the actual application effect of the sealing element is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensor installation, and in particular relates to a waterproof platinum resistance temperature sensor. Background Art

[0002] Platinum resistance temperature sensors measure temperature by exploiting the property of platinum metal: its resistance changes with temperature. The display shows the temperature corresponding to the resistance of the platinum resistor. When a temperature gradient exists within the measured medium, the measured temperature is the average temperature of the dielectric layer within the range of the temperature sensing element. The resistance varies with temperature. Connecting a platinum resistor to a circuit and observing the change in current reveals the change in resistance. By recording the current at different temperatures and plotting a temperature-resistance graph, the temperature can be inferred from the known resistance.

[0003] Problems with existing technologies:

[0004] Most existing platinum resistance temperature sensors are installed through threaded connections. The torsion portion and threaded connection provided for their fixed connection only provide a single-layer sealing effect. Therefore, when installed and used in equipment that requires heating and cooling, internal temperature changes can easily cause thermal expansion and contraction effects at the installation location, thereby affecting the sealing and service life. Utility Model Content

[0005] The purpose of the utility model is to provide a waterproof platinum resistance temperature sensor, which can solve the problem that most existing platinum resistance temperature sensors are installed through threaded connections, and the torsion portion and the threaded connection provided for the fixed connection only have a single-layer sealing effect. Therefore, when the sensor is installed and used in some equipment that needs to be heated and cooled, the internal temperature changes are likely to cause thermal expansion and contraction effects at the installation position, thereby affecting the sealing and service life.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A waterproof platinum resistance temperature sensor, comprising a mounting member, wherein the mounting member is connected to a sealing member and a tightening member;

[0008] The mounting member includes a reinforcing rod, a platinum resistance sensor is fixedly installed in the reinforcing rod, a pressing plate and a first torsion portion are fixedly installed on the reinforcing rod, and the first torsion portion is configured as an octagonal column;

[0009] The reinforcing rod is provided with two sections of spiral patterns and a first tapered portion.

[0010] The outer peripheral surface of the pressing plate is provided with a second tapered portion, and the bottom surface of the pressing plate is sleeved with the first sealing ring through the provided embedding groove.

[0011] The sealing member comprises a cone ring, which is sleeved on the second cone portion and is fixedly connected to the lower pressure ring and the second sealing ring.

[0012] The pressing member includes a cover cap, and the inner wall surface of the cover cap is provided with a third tapered portion. The third tapered portion is opposite to the second tapered portion in direction, and the third tapered portion is adapted to the lower pressure ring.

[0013] A screw cap is fixed on the cover cap, and the bottom surface of the screw cap is sleeved with the third sealing ring through a first groove.

[0014] The screw cap is threadedly connected to the spiral pattern on the upper side. A second torsion portion is fixedly provided on the screw cap, and the second torsion portion is in the shape of an octagonal column.

[0015] The bottom surface of the cover cap is sleeved with the fourth sealing ring via the second groove.

[0016] The inner diameter of the cover cap is 1.3 times the outer diameter of the lower pressure ring.

[0017] The first sealing ring is made of EPDM rubber.

[0018] The second sealing ring is made of polytetrafluoroethylene.

[0019] The technical effects achieved by this utility model are:

[0020] The utility model provides a mounting member, a sealing member and a tightening member, so that after the mounting member is installed on the equipment, the tightening member can be rotated, so that the rotating member can press the sealing member downward and tighten it on the installed equipment, so that the mounting member and the sealing member can form a double-layer sealing effect, thereby improving the sealing effect.

[0021] The utility model provides mounting parts, sealing parts and tightening parts, so that the sealing part can rely on the second conical part on the pressure plate and the third conical part on the cover cap under heating or cooling conditions. When thermal expansion occurs, the second conical part presses the sealing part downward, thereby increasing the contact and extrusion force with the installation equipment. Secondly, when the temperature drops, the third conical part can squeeze the sealing part downward, thereby also increasing the extrusion force thereof. In this way, the sealing effect for the installation of heating and cooling equipment can be improved, thereby improving its practical application effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view structural diagram of the present utility model;

[0023] Figure 2 It is a structural diagram of the mounting member in the utility model;

[0024] Figure 3 It is a structural diagram of the sealing member in the utility model;

[0025] Figure 4 This is a schematic structural diagram of the tightening member in the utility model;

[0026] Figure 5 It is a schematic structural diagram of the top tightening member in the utility model when viewed from above.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. Mounting part; 11. Reinforcing rod; 12. Spiral pattern; 13. First conical portion; 14. Pressure plate; 15. Second conical portion; 16. Ring groove; 17. First sealing ring; 18. First torsion portion; 2. Sealing part; 21. Conical ring; 22. Lower pressure ring; 23. Second sealing ring; 3. Tightening part; 31. Cover cap; 32. Third conical portion; 33. Third sealing ring; 34. Fourth sealing ring; 35. Screw cap; 36. Second torsion portion; 4. Platinum resistance sensor. DETAILED DESCRIPTION

[0029] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0030] like Figure 1 As shown, a waterproof platinum resistance temperature sensor includes a mounting member 1, which is connected to a sealing member 2 and a tightening member 3;

[0031] The mounting member 1 includes a reinforcing rod 11, in which a platinum resistance sensor 4 is fixed. A pressing plate 14 and a first torsion portion 18 are fixed on the reinforcing rod 11. The first torsion portion 18 is in the shape of an octagonal prism.

[0032] The reinforcing rod 11 is provided with two sections of spiral patterns 12 and a first tapered portion 13 .

[0033] Refer to the attached Figure 2 The outer circumference of the pressing plate 14 is provided with a second tapered portion 15 , and the bottom surface of the pressing plate 14 is sleeved with the first sealing ring 17 through the provided embedded ring groove 16 .

[0034] According to the above structure, the reinforcing rod 11 on the mounting part 1 can drive the platinum resistance sensor 4 to be inserted into the spiral hole opened on the mounting equipment, and then the spiral patterns 12 on the upper and lower sides of the reinforcing rod 11 can be threadedly connected to the threaded hole, so that the reinforcing rod 11 drives the pressure plate 14 to press against the surface of the mounting equipment. At the same time, the first sealing ring 17 on the pressure plate 14 is also squeezed into contact with the surface of the mounting equipment to form a seal. At the same time, the second conical portion 15 on the pressure plate 14 drives the second sealing ring 23 on the sealing member 2 to also contact the surface of the mounting equipment, thereby forming a secondary sealing effect.

[0035] Refer to the attached Figure 3 , the seal 2 includes a cone ring 21, the cone ring 21 is sleeved on the second conical portion 15, the cone ring 21 and the lower pressure ring 22 and the second sealing ring 23 are fixedly connected.

[0036] According to the above structure, in a temperature-increasing environment, the pressing plate 14 is affected by the temperature to produce a thermal expansion effect, thereby expanding the radius of the second tapered portion 15, thereby squeezing the sleeve cone ring 21, so that the sleeve cone ring 21 descends and drives the second sealing ring 23 to increase the contact force with the surface of the mounting device to improve the sealing effect;

[0037] Under the cooling environment, the cap 31 contracts, and at the same time drives the third conical portion 32 to contract as a whole, thereby squeezing the lower pressure ring 22 downward, which can increase the downward pressure of the second sealing ring 23 and improve the sealing effect.

[0038] Refer to the attached Figure 4 and attached Figure 5 The tightening member 3 includes a cap 31 , and a third tapered portion 32 is provided on the inner wall of the cap 31 . The third tapered portion 32 is opposite to the second tapered portion 15 , and the third tapered portion 32 is adapted to the lower pressure ring 22 .

[0039] Furthermore, a screw cap 35 is fixedly provided on the cover cap 31 , and the bottom surface of the screw cap 35 is sleeved with the third sealing ring 33 via a first groove.

[0040] Furthermore, the screw cap 35 is threadedly connected to the upper spiral pattern 12 , and a second torsion portion 36 is fixedly provided on the screw cap 35 . The second torsion portion 36 is configured in an octagonal column shape.

[0041] Furthermore, the bottom surface of the cover cap 31 is sleeved with the fourth sealing ring 34 through the second groove.

[0042] Furthermore, the inner diameter of the cap 31 is 1.3 times the outer diameter of the lower pressure ring 22 .

[0043] According to the above structure, the tightening member 3 is rotated to make the screw cap 35 on the tightening member 3 descend along the spiral pattern 12 on the upper side, and the screw cap 35 drives the cover cap 31 to descend synchronously, so that the third sealing ring 33 is squeezed into contact with the first conical portion 13 to form a seal. At the same time, the third conical portion 32 in the cover cap 31 is squeezed into contact with the lower pressure ring 22 on the sealing member 2, thereby pressing the lower pressure ring 22 downward, and at the same time driving the second sealing ring 23 to increase the squeezing force with the surface of the installation equipment, thereby improving its secondary sealing effect.

[0044] Furthermore, the first sealing ring 17 is made of EPDM rubber.

[0045] Furthermore, the second sealing ring 23 is made of polytetrafluoroethylene.

[0046] The working principle of the utility model is as follows: the reinforcing rod 11 on the mounting part 1 can be used to drive the platinum resistance sensor 4 to be inserted into the spiral hole opened on the mounting device, and then the spiral patterns 12 on the upper and lower sides of the reinforcing rod 11 are screwed into the threaded hole, so that the reinforcing rod 11 drives the pressing plate 14 to press against the surface of the mounting device, and at the same time, the first sealing ring 17 on the pressing plate 14 is also pressed into contact with the surface of the mounting device to form a seal, and at the same time, the second tapered portion 15 on the pressing plate 14 drives the second sealing ring 23 on the sealing member 2 to also contact the surface of the mounting device, thereby forming a secondary sealing effect;

[0047] Then, the tightening member 3 is rotated to make the screw cap 35 on the tightening member 3 descend along the upper spiral pattern 12. The screw cap 35 drives the cover cap 31 to descend synchronously, so that the third sealing ring 33 is squeezed into contact with the first tapered portion 13 to form a seal. At the same time, the third tapered portion 32 in the cover cap 31 is squeezed into contact with the lower pressure ring 22 on the sealing member 2, thereby pressing the lower pressure ring 22 downward and driving the second sealing ring 23 to increase the squeezing force with the surface of the installation equipment, thereby improving its secondary sealing effect.

[0048] In a warming environment, the pressing plate 14 is affected by the temperature and produces a thermal expansion effect, thereby expanding the radius of the second tapered portion 15. This can squeeze the sleeve tapered ring 21, causing the sleeve tapered ring 21 to descend and drive the second sealing ring 23 to increase the contact strength with the surface of the mounting device to improve the sealing effect;

[0049] Under the cooling environment, the cap 31 contracts, and at the same time drives the third conical portion 32 to contract as a whole, thereby squeezing the lower pressure ring 22 downward, which can increase the downward pressure of the second sealing ring 23 and improve the sealing effect.

[0050] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A waterproof platinum resistance temperature sensor, comprising a mounting member (1), characterized in that: The mounting member (1) is connected to the sealing member (2) and the tightening member (3); The mounting member (1) comprises a reinforcing rod (11), a platinum resistance sensor (4) is fixedly mounted in the reinforcing rod (11), a pressing plate (14) and a first torsion portion (18) are fixedly mounted on the reinforcing rod (11), and the first torsion portion (18) is in the shape of an octagonal column; The reinforcing rod (11) is provided with two sections of spiral patterns (12) and a first tapered portion (13).

2. The waterproof platinum resistance temperature sensor according to claim 1, characterized in that: The outer peripheral surface of the pressing plate (14) is provided with a second tapered portion (15), and the bottom surface of the pressing plate (14) is sleeved with the first sealing ring (17) via the provided inserting ring groove (16).

3. The waterproof platinum resistance temperature sensor according to claim 1, characterized in that: The sealing member (2) comprises a sleeve cone ring (21), the sleeve cone ring (21) being sleeved on the second cone portion (15), and the sleeve cone ring (21) being fixedly connected to the lower pressure ring (22) and the second sealing ring (23).

4. The waterproof platinum resistance temperature sensor according to claim 1, characterized in that: The tightening member (3) includes a cap (31), and the inner wall surface of the cap (31) is provided with a third conical portion (32). The third conical portion (32) is opposite in direction to the second conical portion (15), and the third conical portion (32) is adapted to the lower pressure ring (22).

5. The waterproof platinum resistance temperature sensor according to claim 4, characterized in that: A screw cap (35) is fixedly provided on the cover cap (31), and the bottom surface of the screw cap (35) is sleeved with the third sealing ring (33) via a first groove.

6. The waterproof platinum resistance temperature sensor according to claim 5, characterized in that: The screw cap (35) is threadedly connected to the upper spiral pattern (12), and a second twisting portion (36) is fixedly provided on the screw cap (35), and the second twisting portion (36) is configured in an octagonal column shape.

7. The waterproof platinum resistance temperature sensor according to claim 4, characterized in that: The bottom surface of the cover cap (31) is sleeved with the fourth sealing ring (34) via a second groove.

8. The waterproof platinum resistance temperature sensor according to claim 4, characterized in that: The inner diameter of the cover cap (31) is 1.3 times the outer diameter of the lower pressure ring (22).

9. The waterproof platinum resistance temperature sensor according to claim 2, characterized in that: The first sealing ring (17) is made of EPDM rubber.

10. The waterproof platinum resistance temperature sensor according to claim 3, characterized in that: The second sealing ring (23) is made of polytetrafluoroethylene material.

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