CN212645923U - Integrated thermometer sheath guide joint structure in cold box - Google Patents

Abstract

The utility model discloses an integration thermometer sheath direction joint design in cold box belongs to thermometer protection architecture field. The structure provides a guide joint structure of an integrated thermometer sheath in a cold box, and the guide joint with a guide hole is connected with the thermometer sheath without parts such as a double-threaded joint, a fixed pipe hoop, a locking nut and a flange in the traditional structure. The structure is very convenient to install, the centering installation of the integrated thermometer probe can be quickly realized in the dismounting process, and the on-line maintenance or replacement efficiency of the integrated thermometer is improved. Meanwhile, the structure is simple in manufacturing process, low in material cost and worthy of popularization.

Description

Integrated thermometer sheath guide joint structure in cold box

Technical Field

The utility model belongs to thermometer protection architecture field, concretely relates to integration thermometer sheath direction joint design in cold box.

Background

At present, in a cold box of an ethylene cracking device, in order to realize online maintenance or replace a thermal resistor and a temperature transmitter for detecting the working temperature of a process medium in the cold box, an integrated temperature transmitter is generally adopted. The structures currently provided by the integrated temperature transmitter suppliers include a thermometer sheath with an internal threaded bore joint, a double-threaded joint, a fixed ferrule, a lock nut, a thermometer probe (longer), a flange, a transmitter, etc. For example, chinese utility model patent application No. CN201520283479.4 discloses a temperature measuring device for use in a multi-size natural gas pipeline, wherein the thermometer sheath is a coaxial three-section cylindrical thermometer sheath, a thread screwed with a bimetallic thermometer is formed in a top thermometer mounting groove of the thermometer sheath, and a polytetrafluoroethylene gasket is arranged on a bottom boss of the thermometer mounting groove.

However, the traditional integrated temperature transmitter mounting structure is complex, not only is the manufacturing complex, the cost of labor materials is high, and the mounting steps are complex, but also in the normal operation process of the cold box, once the integrated temperature transmitter breaks down, the thermometer needs to be overhauled or replaced on line. However, when the thermometer is taken out of the protective cover, the thermometer probe is relatively long, and the internal hole of the head screw joint is relatively small, so that it is difficult to replace the thermometer probe into the thermometer protective cover, which takes a lot of time.

Disclosure of Invention

An object of the utility model is to solve the current foretell problem of solution, provide an integration thermometer sheath direction joint design in cold box, this structure can avoid being difficult to install the defect of returning the thermometer sheath because of the double-end threaded joint hole is less and thermometer probe (longer).

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

an integrated thermometer sheath guide joint structure in a cold box comprises a thermometer sheath and a guide joint;

the thermometer sheath comprises a sheath body, an internal thread hole and a thermometer catheter, wherein the internal thread hole is formed in the top of the thermometer catheter, the thermometer catheter is axially arranged in the sheath body, the bottom of the thermometer catheter is closed and does not penetrate through the sheath body, and the top of the thermometer sheath is communicated with the internal thread hole;

the guide joint comprises a joint body, an external thread connecting section, a guide hole and a connecting channel; the guide hole is opened in the joint body in an open mode, and the connecting channel penetrates through the external thread connecting section; the external thread connecting section is arranged at the bottom of the joint body and is used for forming thread fit and fixation with an internal thread hole in the thermometer sheath, so that the bottom of the guide hole is communicated with the thermometer guide pipe through a connecting channel; the inner wall of the guide hole has an inclination toward the top of the connection passage from top to bottom.

Preferably, the guide hole is in a shape of an inverted truncated cone.

Preferably, the sheath body consists of an insertion end and an expansion end, the insertion end is used for being inserted into the process pipeline, and the expansion end is used for being fixed outside the process pipeline.

Preferably, the female screw hole is M16X1.5-standard female screw hole.

Further, the external thread connecting section is a matched external thread joint with M16X1.5 specifications.

Preferably, in the assembled state of the thermometer sheath and the guide joint, the guide hole, the connecting channel, the internal thread hole and the thermometer catheter are coaxially arranged.

Preferably, the diameter of the bottom surface of the guide hole is the same as the diameter of the top of the connection passage.

Preferably, the diameter of the connecting channel is greater than or equal to the diameter of the top of the thermometer tube.

Preferably, the thermometer sheath and the guide joint are made of the same material.

Preferably, the thermometer tube has an inner diameter larger than an outer diameter of the integrated thermometer probe to be installed.

The utility model discloses following beneficial effect has:

the structure provides a guide joint structure of an integrated thermometer sheath in a cold box, and the guide joint with a guide hole is connected with the thermometer sheath without parts such as a double-threaded joint, a fixed pipe hoop, a locking nut and a flange in the traditional structure. The structure is very convenient to install, the centering installation of the integrated thermometer probe can be quickly realized in the dismounting process, and the on-line maintenance or replacement efficiency of the integrated thermometer is improved. Meanwhile, the structure is simple in manufacturing process, low in material cost and worthy of popularization.

Drawings

FIG. 1 is a schematic view of an integrated thermometer sheath guide joint design in a cold box;

FIG. 2 is a schematic view of the construction of the thermometer sheath;

FIG. 3 is a schematic view of the structure of the pilot joint;

FIG. 4 is a schematic representation of dimensional parameters (in mm) of the thermometer sheath;

figure 5 is a graphical representation of the dimensional parameters of the pilot joint (in mm).

Detailed Description

The technical solution of the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

In a preferred embodiment of the present invention, as shown in fig. 1, there is provided a guide joint structure of a thermometer sheath integrated in a cold box, which is mainly composed of two parts, i.e., a thermometer sheath 1 and a guide joint 2.

The thermometer sheath 1 comprises a sheath body 101, an internal thread hole 102 and a thermometer guide tube 103, and is used for being fixed on a process pipeline of a cold box and providing a position for installing an integrated thermometer. The sheath body 101 is composed of an insertion end and an expansion end, wherein the insertion end is used for being inserted into the process pipeline, and the expansion end is used for being fixed outside the process pipeline and preventing the whole body from sliding into the pipeline. The internally threaded hole 102 is opened at the top of the thermometer tube 103, and the inner wall is tapped for mounting the guide adapter 2. The thermometer tube 103 is arranged axially in the jacket body 101, and its bottom should be kept closed so as not to penetrate the jacket body 101, preventing external cold fluid from directly entering the thermometer tube 103. The top of the thermometer tube 103 is communicated with the internal thread hole 102.

In addition, the pilot connector 2 includes several parts, a connector body 201, a male connecting section 202, a pilot hole 203, and a connecting channel 204. The guide hole 203 is opened in the joint body 201, and the top thereof is opened. The connecting channel 204 is arranged through the externally threaded connecting section 202. The external thread connection section 202 is arranged at the bottom of the joint body 201, an external thread matched with the internal thread hole 102 is tapped outside the external thread connection section 202, and when the thermometer sheath 1 and the guide joint 2 need to be assembled, the external thread connection section 202 can be screwed into the internal thread hole 102 in the thermometer sheath 1 to form thread matching fixation. When the two are fitted and fixed, the bottom of the guide hole 203 communicates with the thermometer tube 103 through the connecting passage 204 to form a continuous passage for installing the thermometer probe.

In this embodiment, in order to ensure smooth insertion of the thermometer probe, the guide hole 203, the connection passage 204, the female screw hole 102, and the thermometer guide tube 103 are coaxially arranged in the assembled state of the thermometer sheath 1 and the guide adapter 2.

In the present invention, in order to facilitate the insertion of the long integrated thermometer probe into the thermometer guide 103 smoothly, the shape of the guide hole 203 is optimized, and the inner wall of the guide hole 203 is designed to have a gradient toward the top of the connecting passage 204 from the top down. In this embodiment, the guide hole 203 shown in FIG. 3 has a rounded truncated cone shape, the diameter of the hole at the top is much larger than that at the bottom, so that the thermometer probe can be inserted into the guide hole 203 more easily, and the probe tip can be guided into the connecting channel 204 by the inner wall of the guide hole from top to bottom with an inclination toward the top of the connecting channel 204, thereby being inserted into the thermometer tube 103 through the connecting channel 204. Further, the diameter of the bottom surface of the guide hole 203 may be set to be the same as the diameter of the top portion of the connection passage 204, so that the probe can be smoothly slid into the connection passage 204 at the engaged position of the both. Also, the diameter of the connecting passage 204 should be greater than or equal to the diameter of the top of the thermometer tube 103, preferably equal to the diameter of the top of the thermometer tube 103.

In use of this construction, the inner diameter of the thermometer catheter 103 should be slightly larger than the outer diameter of the integrated thermometer probe to be installed. The utility model discloses an internal thread hole 102 and external threaded connection section 202's screw thread needs the cooperation design, guarantees to block steadily. As shown in fig. 4 and 5, in this embodiment, the internally threaded bore 102 is an M16X1.5 gauge internally threaded bore and the externally threaded connecting section 202 is a mating M16X1.5 gauge externally threaded connector. The thermometer probe has an outer diameter of 6 and the thermometer sheath has a bore diameter of 7 in the thermometer catheter 103, the remaining dimensional parameters being shown in detail. Thermometer sheath 1 and guide joint 2 can adopt the bar processing of same material to form, and the external screw thread of guide joint 2 is processed and is needed to reserve the tool withdrawal groove to processing.

When the thermometer sheath is installed, the insertion end of the thermometer sheath is inserted into the center of the process pipeline and welded and fixed, and the expansion end at the other end is positioned outside the pipeline. And then the M16X1.5 external thread joint of the guide joint 2 is fixedly connected with an internal thread hole with the specification of M16X1.5 at one end of the thermometer sheath by screw threads. When the thermometer probe is installed through the protective guide pipe, the thermometer probe (the outer diameter phi 6) and the inner hole (the aperture phi 7) of the thermometer sheath are very conveniently and quickly centered under the guiding action of the tapered hole, so that the thermometer probe is easily installed at the bottom of the thermometer sheath, the installation time is saved, and the online maintenance or replacement efficiency of the integrated thermometer is improved.

Of course, in the above-mentioned embodiment, the guiding hole 203 is in the form of an inverted truncated cone, but it may be in the form of a semi-sphere with a decreasing cross-sectional diameter from top to bottom, or in the form of other curved surfaces, as long as the guiding inclination of the inner wall thereof from top to bottom toward the top of the connecting channel 204 can be ensured.

The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, which is intended to cover any modifications and variations within the spirit and scope of the appended claims.

Claims (10)

1. An integrated thermometer sheath guide joint structure in a cold box is characterized by comprising a thermometer sheath (1) and a guide joint (2);

the thermometer sheath (1) comprises a sheath body (101), an internal thread hole (102) and a thermometer guide tube (103), wherein the internal thread hole (102) is formed in the top of the thermometer guide tube (103), the thermometer guide tube (103) is axially arranged in the sheath body (101), the bottom of the thermometer guide tube is closed and does not penetrate through the sheath body (101), and the top of the thermometer guide tube is communicated with the internal thread hole (102);

the guide joint (2) comprises a joint body (201), an external thread connecting section (202), a guide hole (203) and a connecting channel (204); the guide hole (203) is opened in the joint body (201), and the connecting channel (204) penetrates through the external thread connecting section (202); the external thread connecting section (202) is arranged at the bottom of the joint body (201) and is used for forming thread matching and fixing with an internal thread hole (102) in the thermometer sheath (1), so that the bottom of the guide hole (203) is communicated with the thermometer guide pipe (103) through a connecting channel (204); the inner wall of the guide hole (203) has an inclination toward the top of the connection passage (204) from top to bottom.

2. The structure of the integrated thermometer sheath guide joint in the cold box as claimed in claim 1, wherein the guide hole (203) is in the shape of an inverted truncated cone.

3. The structure of the integrated thermometer sheath guiding joint in the cold box as claimed in claim 1, wherein the sheath body (101) is composed of an insertion end for inserting into the process pipe and an expansion end for fixing outside the process pipe.

4. The integrated thermometer sheath guide joint structure in a cold box according to claim 1, wherein the female screw hole (102) is a M16X1.5-sized female screw hole.

5. The integrated thermometer sheath guide joint structure in a cold box according to claim 4, wherein the externally threaded connecting section (202) is a matching M16X1.5 gauge externally threaded joint.

6. The integrated thermometer sheath guide joint structure in the cold box according to claim 1, wherein the guide hole (203), the connecting passage (204), the internally threaded hole (102) and the thermometer guide tube (103) are coaxially arranged in the assembled state of the thermometer sheath (1) and the guide joint (2).

7. The structure of the integrated thermometer sheath guide joint in a cold box according to claim 1, wherein the diameter of the bottom surface of the guide hole (203) is the same as the diameter of the top of the connecting passage (204).

8. The integrated thermometer sheath guide joint structure in a cold box according to claim 1, wherein the diameter of the connecting passage (204) is larger than or equal to the diameter of the top of the thermometer tube (103).

9. The structure of the integrated thermometer sheath guide joint in the cold box as set forth in claim 1, wherein the material of the thermometer sheath (1) and the material of the guide joint (2) are the same.

10. The integrated thermometer sheath guide joint structure in a cold box according to claim 1, wherein the thermometer tube (103) has an inner diameter larger than an outer diameter of the integrated thermometer probe to be installed.

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