A heat-resistant and anti-coking rotating thermocouple

Abstract

The present invention relates to a heat-resistant and anti-coking rotating thermocouple, comprising a junction box, an upper protective tube, an armored thermocouple wire, an inner protective tube and a base, wherein the armored thermocouple wire is arranged in the inner protective tube and / or the upper protective tube, and further comprising a connector and a wear-resistant tube, wherein one end of the upper protective tube is connected to the junction box, and the other end is connected to one end of the connector; one end of the inner protective tube is connected to the base, and the other end is connected to the other end of the connector; a wear-resistant tube is sleeved on the inner protective tube, and the wear-resistant tube is rotatably connected to the inner protective tube. The heat-resistant and anti-coking rotating thermocouple provided by the present invention is achieved by sleeved a plurality of wear-resistant tube monomers on the inner protective tube, and the wear-resistant tube monomers are arranged to be rotatable, so that the wear-resistant tube can rotate when being subjected to force during use, thereby reducing the friction between the wear-resistant tube and the medium, and having good anti-wear performance.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature sensors, and in particular relates to a temperature-resistant and anti-coking rotating thermocouple. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments and have a wide range of applications. Among them, thermocouples used in industrial sites such as pulverized coal furnaces, ball mills, and cement plants require not only high accuracy of thermocouples, but also high wear resistance, vibration resistance, and high temperature resistance. The existing methods for improving the wear resistance, vibration resistance, and high temperature resistance of thermocouples are mainly achieved through material improvements. As people's requirements for the wear resistance of thermocouples increase, the existing methods can no longer meet people's requirements for the higher wear resistance of thermocouples. How to improve the wear resistance of thermocouples has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a temperature-resistant and anti-coking rotating thermocouple to solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned object of the invention, a technical solution provided by the present invention is as follows:

[0005] A temperature-resistant and anti-coking rotating thermocouple comprises a junction box, an upper protective tube, an armored thermocouple wire, an inner protective tube and a base, wherein the armored thermocouple wire is arranged in the inner protective tube and / or the upper protective tube, and further comprises a connector and a wear-resistant tube, wherein one end of the upper protective tube is connected to the junction box, and the other end is connected to one end of the connector; one end of the inner protective tube is connected to the base, and the other end is connected to the other end of the connector; a wear-resistant tube is sleeved on the inner protective tube, and the wear-resistant tube is rotatably connected to the inner protective tube.

[0006] Preferably, the inner protection tube is detachably connected to the connector.

[0007] Preferably, the wear-resistant pipe includes a plurality of wear-resistant pipe monomers, which are sequentially sleeved on the inner protective pipe and rotatably connected to the inner protective pipe; the diameter of the connector is larger than the diameter of the inner protective pipe, forming a barrier to the wear-resistant pipe on one side of the wear-resistant pipe, and the diameter of the base is larger than the diameter of the inner protective pipe, forming a barrier to the wear-resistant pipe on the other side of the wear-resistant pipe.

[0008] Preferably, the connector is a threaded joint, the upper protective tube is welded to the threaded joint, and the inner protective tube is threadedly connected to the threaded joint.

[0009] Preferably, the threaded joint is provided with an internal thread and an external thread, the inner protective tube is connected to the threaded joint via the internal thread, and the external thread is used to fix the threaded joint on a carrier.

[0010] Preferably, the armored even wire is an elastic structure armored even wire, one end of the armored even wire is against the base, and the other end passes through the inner protective tube and the upper protective tube and is fixed in the junction box.

[0011] Preferably, the inner protective tube is welded to the base.

[0012] Preferably, the wear-resistant pipe is a high-chromium steel composite wear-resistant pipe.

[0013] Preferably, the upper protective tube is threadably connected to the junction box.

[0014] The heat-resistant and anti-coking rotating thermocouple provided by the present invention has the following advantages:

[0015] 1. By arranging multiple wear-resistant tube monomers on the inner protective tube, and setting the wear-resistant tube monomers to be rotatable, the wear-resistant tube can be rotated when it is subjected to force during use, thereby reducing the friction between the wear-resistant tube and the medium, and having good anti-wear performance;

[0016] 2. Multiple wear-resistant tube monomers can rotate under force, so dust and light particles are not easy to adhere to the wear-resistant tube monomers, so it is not easy to form coking on the wear-resistant tube monomers, and the anti-coking effect is good. In addition, the characteristics of high-chromium steel composite wear-resistant tubes can play a role in high temperature resistance, wear resistance and anti-coking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the heat-resistant and anti-coking rotating thermocouple of the present invention;

[0018] Reference numerals in the figure: junction box 1, upper protective tube 2, armored wire 3, connector 4, inner protective tube 5, wear-resistant tube monomer 6, base 7. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example 1, the present invention provides a temperature-resistant and anti-coking rotating thermocouple, see Figure 1, including a junction box 1, an upper protective tube 2, an armored wire 3, an inner protective tube 5, a base 7, a connector 4 and a wear-resistant tube, wherein the armored wire is arranged in the inner protective tube and / or the upper protective tube, one end of the upper protective tube is connected to the junction box, and the other end is connected to one end of the connector, one end of the inner protective tube is connected to the base, generally connected by welding, and the other end is threadedly connected to the other end of the connector, the inner protective tube is sleeved with a wear-resistant tube, and the wear-resistant tube is rotatably connected to the inner protective tube, wherein the wear-resistant tube includes a plurality of wear-resistant tube monomers 6, and the plurality of wear-resistant tube monomers are sequentially sleeved on the inner protective tube and rotatably connected to the inner protective tube; the diameter of the connector is larger than the diameter of the inner protective tube, and a barrier to the wear-resistant tube is formed on one side of the wear-resistant tube, the diameter of the base is larger than the diameter of the inner protective tube, and a barrier to the wear-resistant tube is formed on the other side of the wear-resistant tube, in this embodiment, the wear-resistant tube can use a high-chromium steel wear-resistant tube, and the connector and the inner protective tube can also use other detachable connection methods.

[0021] The above-mentioned temperature-resistant and anti-coking rotating thermocouple has the following advantages:

[0022] 1. By arranging multiple wear-resistant tube monomers on the inner protective tube, and setting the wear-resistant tube monomers to be rotatable, the wear-resistant tube can be rotated when it is subjected to force during use, thereby reducing the friction between the wear-resistant tube and the medium, and having good anti-wear performance;

[0023] 2. Multiple wear-resistant tube monomers can rotate under force, so dust and light particles are not easy to adhere to the wear-resistant tube monomers, so it is not easy to form coking on the wear-resistant tube monomers, and the anti-coking effect is good. In addition, the characteristics of high-chromium steel composite wear-resistant tubes can play a role in high temperature resistance, wear resistance and anti-coking.

[0024] As an embodiment, the connector is a threaded joint, the upper protective tube is welded to the threaded joint, the inner protective tube is threadedly connected to the threaded joint, the threaded joint is provided with an inner thread and an outer thread, the inner protective tube is connected to the threaded joint via the inner thread, and the outer thread is used to fix the threaded joint on a carrier, wherein the carrier may be a pulverized coal furnace or a ball mill and other equipment. The threaded connection makes the overall structure easy to assemble and maintain, and once the wear-resistant tube monomer is damaged, the inner protective tube can be unscrewed and a new wear-resistant tube monomer can be re-inserted.

[0025] As an embodiment, the armored wire is an elastic structure armored wire, one end of which is against the base, and the other end passes through the inner protection tube and the upper protection tube and is fixed in the junction box. The elastic structure armored wire can use an existing structure, such as a K-type elastic structure armored wire, or the armored wire can be wound around an elastic member (such as a strip spring) to make an elastic structure armored wire, as long as the overall structure of the armored wire is elastic, and no specific limitation is made here. In this way, the elastic structure armored wire can be against the base to buffer vibration and prevent damage to the armored wire.

[0026] Example 2. Example 2 is a specific temperature-resistant and anti-coking rotating thermocouple, including: a junction box, a φ16 upper protective tube, a φ6 K-type elastic structure armored couple wire, an M27×2 fixed thread (also known as a threaded joint), a φ12 inner protective tube, multiple φ22 high-chromium steel wear-resistant tube monomers, and a base. During installation, the base is welded to the φ12 inner protective tube and then polished. According to the depth of insertion into the equipment, a corresponding number of φ22 high-chromium steel wear-resistant tube monomers are put on and then screwed into the M27×2 fixed thread. Before screwing in, the φ16 upper protective tube and the M27×2 fixed thread are welded first, and then the junction box is screwed onto the φ16 upper protective tube. Finally, the assembled φ6 K-type elastic structure armored couple is fixedly installed in the junction box.

[0027] In the above structure, threaded connections are adopted between the junction box and the φ16 upper protection tube, and between the M27×2 fixed thread and the φ12 inner protection tube. The overall structure is conducive to assembly. The φ22 high-chromium steel wear-resistant tube is put on the φ12 inner protection tube. When in use, the wear-resistant tube can be rotated according to the working conditions, which can reduce the friction between the medium and the protection tube. At the same time, the characteristics of the material of the high-chromium steel wear-resistant tube itself can greatly improve the service life of the high-chromium steel wear-resistant tube. Since the φ6 K-type elastic structure armored couple has an elastic structure, the φ6 armored couple can be close to the base, which reduces the thermal response time of the product and ensures the accuracy of temperature measurement.

[0028] The above-mentioned embodiments only express the implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A temperature-resistant and anti-coking rotating thermocouple, comprising a junction box (1), an upper protective tube (2), an armored thermocouple wire (3), an inner protective tube (5) and a base (7), wherein the armored thermocouple wire is arranged in the inner protective tube and / or the upper protective tube; characterized in that: It also includes a connector (4) and a wear-resistant tube, one end of the upper protective tube being connected to the junction box, and the other end being connected to one end of the connector; One end of the inner protection tube is connected to the base, and the other end is connected to the other end of the connector; The inner protective tube is covered with a wear-resistant tube, and the wear-resistant tube is rotatably connected to the inner protective tube; The wear-resistant pipe comprises a plurality of wear-resistant pipe monomers (6), and the plurality of wear-resistant pipe monomers are sequentially sleeved on the inner protective pipe and rotatably connected to the inner protective pipe.

2. A temperature-resistant and anti-coking rotating thermocouple according to claim 1, characterized in that: The inner protection tube is detachably connected to the connector.

3. A temperature-resistant and anti-coking rotating thermocouple according to claim 1, characterized in that: The diameter of the connector is larger than that of the inner protective tube, forming a barrier to the wear-resistant tube on one side of the wear-resistant tube. The diameter of the base is larger than that of the inner protective tube, forming a barrier to the wear-resistant tube on the other side of the wear-resistant tube.

4. A heat-resistant and anti-coking rotating thermocouple according to any one of claims 1 to 3, characterized in that: The connector is a threaded joint, the upper protective tube is welded to the threaded joint, and the inner protective tube is threadedly connected to the threaded joint.

5. A heat-resistant and anti-coking rotating thermocouple according to claim 4, characterized in that: The threaded joint is provided with an internal thread and an external thread. The inner protective tube is connected to the threaded joint via the internal thread. The external thread is used to fix the threaded joint on a carrier.

6. A heat-resistant and anti-coking rotating thermocouple according to any one of claims 1 to 3, characterized in that: The armored even wire is an elastic structure armored even wire, one end of the armored even wire is against the base, and the other end passes through the inner protection tube and the upper protection tube and is fixed in the junction box.

7. A temperature-resistant and anti-coking rotating thermocouple according to claim 1, characterized in that: The inner protection tube is welded to the base.

8. A temperature-resistant and anti-coking rotating thermocouple according to claim 1, characterized in that: The wear-resistant pipe is a high-chromium steel composite wear-resistant pipe.

9. A temperature-resistant and anti-coking rotating thermocouple according to claim 1, characterized in that: The upper protective tube is threadedly connected to the junction box.

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