Thermometer tantalum bushing

Abstract

The utility model discloses a thermometer tantalum bushing pipe belongs to thermometer bushing pipe technical field, and this bushing pipe includes straight pipe and with the bottom end board, flange plate, web and cover plate connected with straight pipe, and straight pipe includes inner tube and outer tube, and the cavity of accommodating is formed to the hollow in the inner tube, and the first through -hole is equipped with on the cover plate and the inner tube top end is connected with cover plate, and the first boss that projects to the accommodating cavity is equipped with on the bottom end board, and the first blind hole is equipped with on the first boss. The utility model discloses tantalum bushing pipe and thermometer can detachable connection, and the accommodating cavity and first blind hole are set up in tantalum bushing pipe, and thermometer is conveniently accommodated and fixed, and the limiting ring is set up in the accommodating cavity, and the first center baffle and second center baffle of center ring can stably fix thermometer, and a plurality of limiting rings are interval setting, and when the pipe body length and diameter of new replacement thermometer have difference with original thermometer, can also fix the thermometer of different length and different diameter in certain range, and the application scope of tantalum bushing pipe is wide.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermometer bushing tubes, and specifically relates to a tantalum bushing tube for a thermometer. Background Technology

[0002] Reactor thermometers are primarily used to monitor temperature changes within the reactor. They are typically mounted at the top of the reactor, with the lower end of the thermometer tube extending downwards and submerged in the material. Since the materials inside the reactor are often highly corrosive, a bushing is usually installed on the outside of the thermometer to isolate the corrosive material from the thermometer's sensing element. Tantalum bushings, with their high chemical stability (especially in strong acid and alkali environments), effectively isolate the corrosive media in the reactor, making them a common choice for reactor thermometer bushings. Currently, the thermometer and tantalum bushing are usually welded together. When the tantalum bushing corrodes or wears, the entire thermometer needs to be replaced, increasing operating costs. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a tantalum liner for a thermometer, which is easy to disassemble with the thermometer and the tantalum liner can be replaced separately.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A tantalum liner for a thermometer includes a straight tube and a bottom end plate, a flange, a stiffening plate, and a cover plate connected to the straight tube. The straight tube includes an inner tube and an outer tube sleeved on the inner tube. The inner tube is hollow to form a receiving cavity. The cover plate is connected to the top end of the inner tube and has a first through hole communicating with the receiving cavity. The bottom end plate has a first boss protruding into the receiving cavity, and the first boss has a first blind hole.

[0006] Furthermore, a limiting ring is provided inside the receiving cavity. The limiting ring includes an outer ring and a central ring connected to the outer ring. The central ring is provided with a first central hole, and a first central baffle connected to the central ring is provided inside the first central hole.

[0007] Furthermore, the first central baffle extends toward the center of the first central hole, and the length of the first central baffle is less than the radius of the first central hole.

[0008] Furthermore, the first central baffle is arranged in a ring array on the inner wall of the central ring.

[0009] Furthermore, a second central baffle connected to the central ring is provided inside the first central hole.

[0010] Furthermore, there is one or more limiting rings.

[0011] Furthermore, the top of the straight pipe penetrates the flange, the bottom of the stiffening plate is connected to the flange, and the bottom of the flange is provided with a first anti-corrosion layer.

[0012] Furthermore, the diameter of the first central hole is larger than the diameter of the first through hole, and the diameter of the first through hole is larger than the diameter of the first blind hole.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0014] 1. The tantalum bushing is detachably connected to the thermometer. The tantalum bushing is provided with a receiving cavity and a first blind hole to facilitate the reception and fixation of the thermometer.

[0015] 2. A limiting ring is installed inside the cavity, and the thermometer can be stably fixed by the first and second central baffles of the central ring;

[0016] 3. Multiple limit rings are set at intervals, which can fix thermometers of different lengths and diameters within a certain range when the tube length and diameter of the newly replaced thermometer are different from those of the original thermometer. The tantalum bushing has a wide range of applications. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure at the bottom plate of the embodiment;

[0019] Figure 3 This is a schematic diagram of the structure at the flange of the embodiment;

[0020] Figure 4 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the limiting ring structure in an embodiment;

[0022] Figure 6 This is a top view schematic diagram of the limiting ring structure in the embodiment;

[0023] Figure 7 This is a schematic diagram of the limiting ring structure from below in an embodiment. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0025] like Figure 1As shown, a tantalum liner for a thermometer includes a straight pipe 1, a bottom end plate 2, a flange 3, a stiffening plate 4, a cover plate 5, and a limiting ring 6. The straight pipe 1 is a circular pipe, including an inner pipe 11 and an outer pipe 12. The inner pipe 11 is vertically arranged and hollow inside to form a receiving cavity 101. The outer pipe 12 is sleeved on the outer wall of the inner pipe 11. In this embodiment, the inner pipe 11 is made of 316L stainless steel and has an outer diameter of 57mm. The outer pipe 12 is made of RO5252 tantalum-tungsten alloy with a tantalum content of about 97.5% and a thickness of 0.7mm. The bottom end plate 2 is connected to the bottom end of the straight pipe 1. A first protrusion 21 protruding into the receiving cavity 101 is provided. The first protrusion 21 is a circular platform. A first blind hole 211 is provided on the first protrusion 21. The first blind hole 211 is located at the center of the first protrusion 21 and is a countersunk blind hole. A second anti-corrosion layer 22 is provided on the outer wall of the bottom end plate 2. The bottom end plate 2 and the second anti-corrosion layer 22 are welded to the lower ends of the inner tube 11 and the outer tube 12. In this embodiment, the body of the bottom end plate 2 and the first protrusion 21 are made of 316L stainless steel. The second anti-corrosion layer 22 is made of RO5252 tantalum-tungsten alloy. The thickness of the second anti-corrosion layer 22 is the same as the thickness of the outer tube 12.

[0026] like Figure 1 and Figure 3 As shown, flange 3 is connected to the straight pipe 1 near its top. The top of the inner pipe 11 of the straight pipe 1 passes through flange 3. Flange 3 has multiple stiffening plates 4. The bottom of the stiffening plates 4 is connected to flange 3, and one side of the stiffening plates 4 is connected to the inner pipe 11. The stiffening plates 4 can strengthen the structural strength of the straight pipe 1 and flange 3. Flange 3 has multiple connection holes arranged in a ring array. The connection holes are used to pass through connecting bolts when connecting to external equipment, such as the flange of the reactor orifice. The bottom end has a first anti-corrosion layer 32. The outer diameter of the first anti-corrosion layer 32 is smaller than the diameter of the circle containing the multiple connection holes. The first anti-corrosion layer 32 is made of RO5252 tantalum-tungsten alloy. In this embodiment, the first anti-corrosion layer 32 is first welded to the outer pipe 12 to form an integral part. After flange 3 is welded to inner pipe 11, the first anti-corrosion layer 32 and outer pipe 12 are fitted onto inner pipe 11 as a whole. Then, the first anti-corrosion layer 32 is welded to flange 3.

[0027] like Figure 1 and Figure 4As shown, the cover plate 5 is connected to the top of the inner tube 11. The cover plate 5 has a first through hole 51 that communicates with the receiving cavity 101. The lower surface of the cover plate 5 has a second boss 52 that protrudes into the receiving cavity 101. The first through hole 51 passes through the second boss 52. In use, the thermometer passes through the first through hole 51 and enters the receiving cavity 101. The upper end of the thermometer tube has an external thread, and the inner wall of the first through hole 51 has an internal thread, so that the thermometer is threadedly connected to the cover plate 5. Alternatively, the thermometer has a sleeve with an internal thread, and the outer circumferential wall of the cover plate 5 has an external thread, so that the thermometer is threadedly connected to the cover plate 5.

[0028] like Figure 1 , Figure 5 and Figure 6 As shown, a limiting ring 6 is provided inside the receiving cavity 101. The limiting ring 6 is generally annular and includes an outer ring 61 and a central ring 62. The outer ring 61 is connected to the inner wall of the inner tube 11. In this embodiment, the outer ring 61 is made of the same 316L stainless steel material as the inner tube 11. The central ring 62 is connected to the outer ring 61 and has an annular groove. The inner ring of the outer ring 61 is located in the annular groove of the central ring 62. In this embodiment, the central ring 62 is made of polytetrafluoroethylene (PTFE) material. A first central hole 620 is provided, which penetrates the central ring 62 from top to bottom. Multiple first central baffles 63 are provided within the first central hole 620, and these baffles 63 are connected to the inner wall of the central ring 62. The baffles 63 are attached to the top of the inner wall of the central ring 62, and are arranged in a ring array on the inner wall of the central ring 62. The baffles 63 are inclined, with the inner side lower than the outer side, and extend towards the center of the first central hole 620. The length of the baffle 63 is less than the radius of the first central hole 620, so that the multiple first central baffles 63 in the annular array surround the first central hole 620 to form a second central hole 621. The first central baffle 63 is elastic. In this embodiment, the first central baffle 63 is made of the same polytetrafluoroethylene (PTFE) material as the central ring 62 and the first central baffle 63 is integrally connected to the central ring 62. Multiple second central baffles 64 are provided in the first central hole 620, and the multiple second central baffles 64 are connected in the central ring 62. At the bottom of the side wall, multiple second central baffles 64 are also arranged in a ring array on the inner wall of the central ring 62. The second central baffles 64 extend toward the center of the first central hole 620. The length of the second central baffles 64 is less than the radius of the first central hole 620. Thus, the multiple second central baffles 64 in the ring array surround the first central hole 620 to form a third central hole 622. The second central baffles 64 are made of the same polytetrafluoroethylene (PTFE) material as the central ring 62 and are integrally connected to the central ring 62.

[0029] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, two limiting rings 6 are arranged vertically, located at the trisection points of the receiving cavity 101. The diameter of the first central hole 620 is larger than the diameter of the first through hole 51, the diameter of the first through hole 51 is larger than the diameter of the first blind hole 211, and the diameter of the first blind hole 211 is larger than the diameter of the second central hole 621. When the length of the thermometer matches the length of the straight tube 1, and the diameter of the lower end of the thermometer tube is the same as the diameter of the first blind hole 211, the diameter of the lower end of the thermometer tube is smaller than the diameter of the first through hole 51. After the thermometer passes through the first through hole 51 into the receiving cavity 101, the thermometer tube continues to penetrate downwards through the first central hole 620 of the upper limiting ring 6. At this time, since the diameters of the second central hole 621 and the third central hole 622 are smaller than the diameter of the thermometer tube, the thermometer tube pushes the first central baffle 63 and the second central baffle 622 downwards. The central baffle 64 thus passes through the first central hole 620 from top to bottom. The first central baffle 63 and the second central baffle 64 are pressed against the outer wall of the thermometer under the elastic action of the body. The thermometer tube continues to pass through the first central hole 620 of the lower limiting ring 6 and enters the first blind hole 211. When the thermometer is in use, the lower end cooperates with the first blind hole 211. Because there are two limiting rings 6 in the middle section, the first central baffle 63 and the second central baffle 64 can limit the shaking of the middle section of the thermometer tube, so the thermometer is stable as a whole. When the length of the thermometer is less than the length of the straight tube 1 but greater than two-thirds of the length of the straight tube 1, and the diameter of the lower end of the thermometer tube is less than the diameter of the first through hole 51, after the thermometer passes through the first through hole 51 into the receiving cavity 101, the thermometer tube continues to pass downward through the first center hole 620 of the upper limiting ring 6 and the lower limiting ring 6. The lower end of the thermometer tube does not reach the first blind hole 211. At this time, due to the restriction of the upper and lower limiting rings 6, the thermometer tube remains stable in the receiving cavity 101. The receiving cavity 101 can store a heat-conducting medium, such as heat-conducting oil, to transfer heat between the straight tube 1 and the thermometer. When the length of the thermometer is less than the length of the straight tube 1 but greater than one-third of the length of the straight tube 1, and the diameter of the lower end of the thermometer tube is less than the diameter of the first through hole 51, after the thermometer passes through the first through hole 51 into the receiving cavity 101, the thermometer tube continues to pass downward through the upper limiting ring 6. Under the restriction of the upper limiting ring 6, the thermometer tube remains stable within the receiving cavity 101. In this embodiment, the tantalum bushing can accommodate thermometers of various diameters and lengths when the diameter of the thermometer tube is less than the diameter of the first through hole 51 and the length of the thermometer is between one-third and the length of the straight tube 1.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tantalum liner for a thermometer, characterized in that, It includes a straight pipe (1) and a bottom end plate (2), a flange (3), a stiffening plate (4) and a cover plate (5) connected to the straight pipe (1). The straight pipe (1) includes an inner pipe (11) and an outer pipe (12) sleeved on the inner pipe (11). The inner pipe (11) is hollow to form a receiving cavity (101). The cover plate (5) is connected to the top end of the inner pipe (11) and the cover plate (5) is provided with a first through hole (51) communicating with the receiving cavity (101). The bottom end plate (2) is provided with a first boss (21) protruding into the receiving cavity (101). The first boss (21) is provided with a first blind hole (211).

2. The thermometer tantalum liner according to claim 1, characterized in that, The cavity (101) is provided with a limiting ring (6), the limiting ring (6) includes an outer ring (61) and a central ring (62) connected to the outer ring (61). The central ring (62) is provided with a first central hole (620), and a first central baffle (63) connected to the central ring (62) is provided in the first central hole (620).

3. The thermometer tantalum liner according to claim 2, characterized in that, The first central baffle (63) extends toward the center of the first central hole (620) and the length of the first central baffle (63) is less than the radius of the first central hole (620).

4. The thermometer tantalum liner according to claim 2, characterized in that, The first central baffle (63) is arranged in a ring array on the inner wall of the central ring (62).

5. The thermometer tantalum liner according to claim 2, characterized in that, The first central hole (620) is provided with a second central baffle (64) connected to the central ring (62).

6. The thermometer tantalum liner according to claim 2, characterized in that, The limiting ring (6) is provided in more than one form.

7. The thermometer tantalum liner according to claim 1, characterized in that, The top of the straight pipe (1) passes through the flange (3), the bottom of the stiffening plate (4) is connected to the flange (3), and the bottom of the flange (3) is provided with a first anti-corrosion layer (32).

8. The thermometer tantalum liner according to claim 2, characterized in that, The diameter of the first central hole (620) is greater than the diameter of the first through hole (51), and the diameter of the first through hole (51) is greater than the diameter of the first blind hole (211).

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