Thermocouple thermometer sleeve assembly

Abstract

The utility model belongs to the technical field of chemical equipment, and particularly relates to a thermocouple thermometer sleeve assembly, which comprises a supporting tube, the supporting tube comprises a supporting tube main body and a connecting tube connected to the bottom of the supporting tube main body, the top of the supporting tube main body is provided with a sleeve nut, and the outer surface of the connecting tube is sleeved with a silicon carbide column head. A thermocouple lead is arranged in the supporting pipe, one end of the thermocouple lead penetrates through the sleeve nut and extends to the outer side of the sleeve nut, the other end of the thermocouple lead penetrates through the connecting pipe and is fixedly connected with a thermocouple probe, and the thermocouple probe makes contact with the inner surface of the silicon carbide column head. The thermocouple thermometer sleeve solves the problem that the thermocouple thermometer sleeve cannot be used in strong acid environments such as sulfuric acid, hydrochloric acid and nitric acid and environments containing acyl chloride compounds for a long time, improves the heat transfer efficiency between the thermocouple thermometer and a measured medium, and ensures the accuracy and sensitivity of temperature measurement of the thermocouple thermometer.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and in particular relates to a thermocouple thermometer sleeve component. Background Art

[0002] Thermocouple thermometer is a temperature measuring instrument based on the thermoelectric effect. When the two ends of the thermocouple are in contact with the temperature environment to be measured, a small electromotive force will be generated at both ends of the thermocouple. The magnitude of this electromotive force is proportional to the temperature difference between the two ends of the thermocouple. The temperature of the temperature environment to be measured can be determined by measuring the magnitude of this electromotive force. In order for the thermocouple thermometer to work properly, especially in harsh environments such as high temperature and corrosive media, a sleeve is required to protect the thermocouple thermometer.

[0003] In chemical laboratories and chemical production processes, the thermocouple thermometer sleeves used are generally made of metal materials, such as stainless steel. However, stainless steel thermocouple thermometer sleeves cannot be used for a long time in strong acid environments such as sulfuric acid, hydrochloric acid, and nitric acid, especially in environments with acyl chloride compounds. Stainless steel thermocouple thermometer sleeves are not resistant to corrosion by acyl chloride compounds. If precious metal materials such as gold and platinum are used, this intolerance problem can be effectively solved, but at the same time, the processing cost of the thermometer sleeve is increased.

[0004] The existing thermocouple thermometer sleeve has poor heat transfer efficiency and cannot accurately reflect the actual temperature of the measured medium. In addition, when the thermocouple thermometer sleeve is applied to a three-necked flask, there is relatively little reaction liquid in the three-necked flask. Since the thermocouple thermometer sleeve is linear, the thermocouple probe will collide with the stirring paddle when it wants to contact the liquid surface of the reaction liquid, affecting the normal operation of the stirring paddle. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a thermocouple thermometer sleeve assembly, which solves the problem that the thermocouple thermometer sleeve cannot be used for a long time in a strong acid environment such as sulfuric acid, hydrochloric acid, nitric acid and an environment containing acyl chloride compounds, while improving the heat transfer efficiency between the thermocouple thermometer and the measured medium, ensuring the accuracy and sensitivity of the temperature measurement of the thermocouple thermometer.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The thermocouple thermometer sleeve assembly described in the utility model comprises a support tube, the support tube comprises a support tube body and a connecting tube connected to the bottom of the support tube body, a sleeve nut is arranged on the top of the support tube body, a silicon carbide column head is sleeved on the outer surface of the connecting tube, a thermocouple lead is arranged inside the support tube, one end of the thermocouple lead passes through the sleeve nut and extends to the outside of the sleeve nut, the other end of the thermocouple lead passes through the connecting tube and is fixedly connected to a thermocouple probe, and the thermocouple probe contacts the inner surface of the silicon carbide column head.

[0008] in:

[0009] A thermocouple lead hole is arranged through the center of the sleeve nut, and an auxiliary hose is arranged inside the thermocouple lead hole.

[0010] A thermocouple lead wire is passed through the auxiliary hose.

[0011] The supporting pipe is a straight pipe or a curved pipe.

[0012] The support tube is communicated with the silicon carbide column head.

[0013] The outer diameter of the connecting pipe is smaller than the outer diameter of the supporting pipe body.

[0014] The cross section of the silicon carbide column head is U-shaped as a whole, and the silicon carbide column head is threadedly connected to the connecting pipe.

[0015] A sealing gasket is arranged between the silicon carbide column head and the supporting tube body.

[0016] The material of the support tube is one or more of polytetrafluoroethylene, polypropylene or polyvinyl chloride.

[0017] The ratio of the length of the silicon carbide column head to the length of the support tube ranges from 0.01 to 0.1.

[0018] The beneficial effects of the utility model are:

[0019] The utility model protects the thermocouple thermometer from being corroded by corrosive liquids by arranging a support tube and a silicon carbide column head, solves the problem that the thermocouple thermometer sleeve cannot be used for a long time in strong acid environments such as sulfuric acid, hydrochloric acid, nitric acid and the like and in environments containing acyl chloride compounds, has low processing cost and strong corrosion resistance, and at the same time prolongs the service life of the thermocouple thermometer; the thermocouple probe contacts the inner surface of the silicon carbide column head, improves the heat transfer efficiency between the thermocouple thermometer and the measured medium, and ensures the accuracy and sensitivity of the temperature measurement of the thermocouple thermometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a thermocouple thermometer sleeve assembly of Example 1;

[0021] Figure 2 It is a schematic diagram of the structure of the sleeve nut;

[0022] Figure 3 1 is a schematic structural diagram of a thermocouple thermometer sleeve assembly according to Embodiment 2;

[0023] In the figure: 1. silicon carbide column head; 2. support tube; 201. support tube body; 202. connecting tube; 3. sleeve nut; 4. sealing gasket; 5. thermocouple probe; 6. thermocouple lead wire; 7. thermocouple lead wire hole; 8. auxiliary hose. DETAILED DESCRIPTION

[0024] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 , Figure 2 As shown, the utility model includes a support tube 2, which includes a support tube body 201 and a connecting tube 202 connected to the bottom of the support tube body 201, a sleeve nut 3 is arranged on the top of the support tube body 201, a silicon carbide column head 1 is sleeved on the outer surface of the connecting tube 202, a thermocouple lead 6 is arranged inside the support tube 2, one end of the thermocouple lead 6 passes through the sleeve nut 3 and extends to the outside of the sleeve nut 3, the other end of the thermocouple lead 6 passes through the connecting tube 202 and is fixedly connected to the thermocouple probe 5, and the thermocouple probe 5 contacts the inner surface of the silicon carbide column head 1.

[0027] The support tube 2 and the silicon carbide column head 1 are used to protect the thermocouple lead wire 6 and the thermocouple probe 5 from being corroded by corrosive liquids, solving the problem that the thermocouple thermometer sleeve cannot be used for a long time in strong acid environments such as sulfuric acid, hydrochloric acid, nitric acid, and environments containing acyl chloride compounds, and has strong anti-corrosion ability. The silicon carbide column head 1 has high heat transfer efficiency and can quickly transfer the temperature of the medium to be measured to the thermocouple probe 5 to ensure heat transfer between the thermocouple thermometer and the medium to be measured; the silicon carbide column head 1 can be filled with heat transfer oil to further improve the accuracy and sensitivity of the temperature measurement of the thermocouple thermometer.

[0028] A thermocouple lead hole 7 is provided through the center of the sleeve nut 3 , and an auxiliary hose 8 is provided inside the thermocouple lead hole 7 .

[0029] Thermocouple lead wires 6 are inserted into the auxiliary hose 8 .

[0030] The support tube 2 is a straight tube.

[0031] The support tube 2 is communicated with the silicon carbide column head 1 .

[0032] The outer diameter of the connecting tube 202 is smaller than the outer diameter of the supporting tube body 201 .

[0033] The cross section of the silicon carbide column head 1 is U-shaped as a whole, and the silicon carbide column head 1 is threadedly connected to the connecting pipe 202 .

[0034] A sealing gasket 4 is provided between the silicon carbide column head 1 and the support tube body 201 .

[0035] The material of the support tube 2 is one or more of polytetrafluoroethylene, polypropylene or polyvinyl chloride.

[0036] The ratio of the length of the silicon carbide column head 1 to the length of the support tube 2 ranges from 0.01 to 0.1.

[0037] Example 2

[0038] like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the support tube 2 is a bent tube.

[0039] Under the condition of not more than 100°C, the raw material is appropriately heated and bent, cooled and formed to obtain a bent pipe. Embodiment 2 is suitable for temperature measurement occasions of non-linear thermocouple thermometers, such as temperature measurement of reaction liquid in a three-necked flask, avoiding the problem that the conventional linear thermocouple thermometer sleeve affects the normal operation of the stirring paddle.

Claims

1. A thermocouple thermometer sleeve assembly, comprising a support tube (2), characterized in that: The support tube (2) comprises a support tube body (201) and a connecting tube (202) connected to the bottom of the support tube body (201); a sleeve nut (3) is arranged on the top of the support tube body (201); a silicon carbide column head (1) is sleeved on the outer surface of the connecting tube (202); a thermocouple lead (6) is arranged inside the support tube (2); one end of the thermocouple lead (6) passes through the sleeve nut (3) and extends to the outside of the sleeve nut (3); the other end of the thermocouple lead (6) passes through the connecting tube (202) and is fixedly connected to a thermocouple probe (5); and the thermocouple probe (5) is in contact with the inner surface of the silicon carbide column head (1).

2. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: A thermocouple lead hole (7) is provided through the center of the sleeve nut (3), and an auxiliary hose (8) is provided inside the thermocouple lead hole (7).

3. The thermocouple thermometer sleeve assembly according to claim 2, characterized in that: A thermocouple lead wire (6) is inserted into the auxiliary hose (8).

4. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: The support pipe (2) is a straight pipe or a curved pipe.

5. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: The support tube (2) is connected to the silicon carbide column head (1).

6. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: The outer diameter of the connecting tube (202) is smaller than the outer diameter of the supporting tube body (201).

7. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: The cross section of the silicon carbide column head (1) is generally U-shaped, and the silicon carbide column head (1) is threadedly connected to the connecting pipe (202).

8. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: A sealing gasket (4) is provided between the silicon carbide column head (1) and the support tube body (201).

9. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: The material of the support tube (2) is one or more of polytetrafluoroethylene, polypropylene or polyvinyl chloride.

10. The thermocouple thermometer sleeve assembly according to claim 1, characterized in that: The ratio of the length of the silicon carbide column head (1) to the length of the support tube (2) is in the range of 0.01 to 0.1.

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