A maintenance device for a replaceable in-line thermocouple

Abstract

The utility model provides a kind of maintenance device of replaceable pipeline thermocouple online, including sealing cylinder, sealing rod, blocking piece, butt joint cylinder and top sealing mechanism;The top of pipeline is provided with hole, and butt joint cylinder is arranged in the hole in the top of pipeline, and the outer wall of butt joint cylinder is welded with the inner wall of hole in the top of pipeline;The bottom of blocking piece is connected with the top of butt joint cylinder;The sealing cylinder is arranged in the top of blocking piece;The sealing rod is arranged in sealing cylinder;Top sealing mechanism is arranged in the top of sealing cylinder.The utility model improves the replacement efficiency of thermocouple in pipeline, and no longer needs pipeline shutdown, and thermocouple can be replaced.

Description

Technical Field

[0001] This utility model relates to a maintenance device, and more particularly to a device that can replace thermocouples in a pipeline without shutting down the pipeline, belonging to the technical field of online thermocouple replacement equipment. Background Technology

[0002] Thermocouples are commonly used temperature-sensing elements in temperature measuring instruments. They directly measure temperature and convert the temperature signal into a thermoelectric potential signal, which is then converted into the temperature of the measured medium by an electrical instrument. Currently, most insertion-type thermocouples in pipelines are threaded or flanged. After a period of use, thermocouples will naturally wear out or become damaged, requiring replacement. However, replacing thermocouples in pipelines can only be done after the pipeline is shut down, which not only affects the efficiency of thermocouple replacement but also the safety of pipeline transportation. Therefore, a device is needed that can replace thermocouples in pipelines without shutting down the pipeline, thus ensuring timely replacement and safe pipeline transportation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a maintenance device for online replacement of pipeline thermocouples. It can replace pipeline thermocouples in a timely manner, thereby improving the safety of pipeline transportation and increasing the efficiency of pipeline thermocouple replacement.

[0004] The problem described in this utility model is solved by the following technical solution: A maintenance device for online replacement of pipeline thermocouples includes a sealing cylinder, a sealing rod, a blocking element, a connecting cylinder, and a top sealing mechanism. A hole is provided at the top of the pipeline, and the connecting cylinder is disposed within the hole at the top of the pipeline; the outer wall of the connecting cylinder is welded to the inner wall of the hole at the top of the pipeline. The bottom end of the blocking element is connected to the top end of the connecting cylinder. The sealing cylinder is disposed at the top end of the blocking element. The sealing rod is disposed within the sealing cylinder. The top sealing mechanism is disposed at the top end of the sealing cylinder.

[0005] The aforementioned maintenance device for online replacement of pipeline thermocouples includes a blocking component comprising a square enclosed frame, a sealing plate, and a discharge valve. The square enclosed frame has a bottom hole on its bottom end face and a top hole on its top end face, with the top hole located directly above the bottom hole. A square hole is provided on the side wall of the square enclosed frame, and sliding grooves are provided on the inner walls of both sides of the square enclosed frame. The sealing plate is inserted into the square hole on the side wall of the square enclosed frame, and its two ends are slidably disposed within the sliding grooves on the inner walls of both sides of the square enclosed frame. A sealing ring is provided on the inner wall of the square hole of the square enclosed frame. The discharge valve is located at the bottom end of the side wall of the square enclosed frame and connects to the inner cavity of the square enclosed frame. The inner diameters of the top hole, bottom hole, and sealing cylinder of the square enclosed frame are identical, and the bottom end of the inner wall of the sealing cylinder is mated and connected to the top end of the top hole of the square enclosed frame.

[0006] The aforementioned maintenance device for online replacement of pipeline thermocouples includes a sealing rod with multiple annular grooves on its outer circumference, each groove containing a sealing ring. Each sealing ring on the outer wall of the sealing rod is pressed tightly against the inner wall of the sealing cylinder. A fine hole is located at the center of the sealing rod along its length. A handle is located at the top of the sealing rod. A sealing gasket is located at the bottom of the sealing rod, with a through hole at its center, the position of which aligns with the bottom end of the fine hole on the sealing rod.

[0007] The aforementioned maintenance device for online replacement of pipeline thermocouples includes a top sealing mechanism comprising a top cover, a junction box, and a top sealing cylinder. The top sealing cylinder is located at the center of the bottom end face of the top cover. The junction box is located on the top surface of the top cover, and a fine hole is provided at the center of the top cover along its axis. A sealing ring is provided on the outer wall of the top sealing cylinder, and this sealing ring is tightly pressed against the top of the inner wall of the sealing cylinder. Several threaded holes are provided on the outer edge of the top cover, and threaded holes are correspondingly provided on the top surface of the sealing cylinder, with bolts passing through both the threaded holes of the top cover and the threaded holes of the sealing cylinder.

[0008] The aforementioned maintenance device for online replacement of pipeline thermocouples involves the thermocouple's tail wire passing sequentially through the central perforation of the sealing gasket, the central fine hole of the sealing rod, and the central fine hole of the top cover before connecting to the junction box; the tail of the thermocouple presses against the center of the bottom end face of the sealing gasket.

[0009] This invention, through the cooperation of a sealing cylinder and a sealing rod, allows the thermocouple to be pulled out directly without shutting down the pipeline, and the blocking component prevents the contents of the pipeline from overflowing when the old thermocouple is pulled out; thus achieving the goal of quickly replacing thermocouples without shutting down the pipeline. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0011] The list of labels in the diagram is as follows: 1. Sealing cylinder, 2. Sealing rod, 3. Connecting cylinder, 4. Square closed frame, 5. Sealing plate, 6. Discharge valve, 7. Top cover, 8. Junction box, 9. Top sealing cylinder, 10. Thermocouple. Detailed Implementation

[0012] See Figure 1 and Figure 2 This utility model includes a sealing cylinder 1, a sealing rod 2, a blocking component, a docking cylinder 3, and a top sealing mechanism. A hole is provided at the top of the pipe, and the docking cylinder 3 is disposed within the hole at the top of the pipe. The outer wall of the docking cylinder 3 is welded to the inner wall of the hole at the top of the pipe. The inner hole of the docking cylinder 3 serves as a channel for the thermocouple, through which the thermocouple enters the pipe. The bottom end of the blocking component is connected to the top end of the docking cylinder 3. The function of the blocking component is to seal the docking cylinder 3 when the thermocouple is pulled out of the pipe for replacement, preventing substances in the pipe from overflowing from the sealing cylinder 1. The sealing cylinder 1 is disposed at the top end of the blocking component. The sealing rod 2 is disposed inside the sealing cylinder 1. The function of the sealing rod 2 is to seal and guide the thermocouple into position. The top sealing mechanism is disposed at the top end of the sealing cylinder 1. The function of the top sealing mechanism is to seal the top end of the sealing cylinder 1 and fix the position of the junction box, ensuring that the thermocouple signal can be smoothly transmitted to the junction box.

[0013] The blocking component includes a square closed frame 4, a sealing plate 5, and a discharge valve 6. The square closed frame 4 has a bottom hole on its bottom end face and a top hole on its top end face, with the top hole located directly above the bottom hole. The square closed frame 4 has square holes on its side walls, and sliding grooves on the inner walls of both sides. The sealing plate 5 is inserted into the square holes on the side walls of the square closed frame 4, and its two ends are slidably positioned within the sliding grooves on the inner walls of both sides of the square closed frame 4. When the sealing plate 5 completely passes through the sliding grooves on the inner walls of both sides of the square closed frame 4, dividing the square closed frame 4 in two, the lower half of the square closed frame 4 is in a sealed state. When plate 5 is mostly located on the outside, the top and bottom holes of the square closed frame 4 correspond to each other, and the thermocouple can pass through from top to bottom. A sealing ring is provided on the inner wall of the square hole of the square closed frame 4. The discharge valve 6 is located at the bottom of the side wall of the square closed frame 4 and is connected to the inner cavity of the square closed frame 4. When there is residual material inside the square closed frame 4, a small amount of material is discharged through the discharge valve 6. The inner diameter of the top hole, the inner diameter of the bottom hole of the square closed frame 4 and the inner diameter of the sealing cylinder 1 are the same, and the bottom of the inner wall of the sealing cylinder 1 matches and connects with the top of the top hole of the square closed frame 4. This is to ensure that the sealing rod 2 can pass through smoothly and to ensure the sealing effect.

[0014] The sealing rod 2 has multiple annular grooves on its outer circumference, and sealing rings are installed in the annular grooves. Each sealing ring on the outer wall of the sealing rod 2 is tightly pressed against the inner wall of the sealing cylinder 1. The sealing rings on the outer wall of the sealing rod 2 ensure that the material in the pipeline is not easily leaked out due to the seal of the sealing rings. A fine hole is provided at the center of the sealing rod 2 along its length, which is used for the thermocouple wire to pass through. A handle is provided at the top of the sealing rod 2, which makes it easy for the operator to pull out the sealing rod 2. A sealing gasket is provided at the bottom of the sealing rod 2, and a through hole is provided at the center of the sealing gasket. The position of the through hole matches the bottom end of the fine hole of the sealing rod 2. The function of the sealing gasket is to seal the material that may leak out at the gap between the connecting cylinder and the thermocouple.

[0015] The top sealing mechanism includes a top cover 7, a junction box 8, and a top sealing cylinder 9. The top sealing cylinder 9 is located at the center of the bottom end face of the top cover 7. The junction box 8 is located on the top surface of the top cover 7, and a fine hole is provided at the center of the top cover 7 along its axis. A sealing ring is provided on the outer wall of the top sealing cylinder 9, and this sealing ring is tightly pressed against the top of the inner wall of the sealing cylinder 1. Several threaded holes are provided on the outer edge of the top cover 7, and threaded holes are provided on the top surface of the sealing cylinder 1 respectively. The bolt passes through the threaded holes of the top cover 7 and the threaded holes of the sealing cylinder 1 at the same time. Tightening the bolt can fix the position of the top cover 7, and the positions of the rest of the parts are also fixed.

[0016] The tail wire of thermocouple 10 passes through the central perforation of the sealing gasket, the central fine hole of the sealing rod 2, and the central fine hole of the top cover 7 in sequence before connecting to the junction box 8; the tail of thermocouple 10 presses against the center of the bottom end face of the sealing gasket.

[0017] Operating principle: When the old thermocouple needs to be removed, the worker unscrews the bolts on the top cover, then slowly pulls the top cover upwards until the top of the sealing rod 2 is exposed. Then, holding the handle at the top of the sealing rod 2, the worker pulls it out. The position of the old thermocouple is determined by the distance it is pulled out. When the old thermocouple passes the top hole of the square sealing frame, the sliding sealing plate 5 seals the square sealing frame 4 to prevent material from overflowing from the pipe. The worker then continues to pull the sealing rod 2 out until it is completely removed. The old thermocouple is then removed, and the guide for the new thermocouple is passed sequentially through the central perforation of the sealing gasket and the central thin hole of the sealing rod 2. After the hole and the center hole of the top cover 7 are connected to the junction box 8, the top sealing cylinder 9 presses against the sealing rod 2, the thermocouple wires are tightened, and the top of the thermocouple is pressed tightly against the sealing gasket at the bottom of the sealing rod 2. Then the sealing rod, along with the new thermocouple, is lowered into the sealing cylinder 1. When the new thermocouple presses against the sealing plate 5, the sliding sealing plate 5 opens the channel, and the sealing rod 2 continues to move down until the top cover 7 presses against the top of the sealing cylinder. At this time, the new thermocouple has entered the docking cylinder 3 and protruded downwards. Finally, the bolts on the top cover 7 are tightened to fix it. The thermocouple replacement operation in the pipeline is now complete.

Claims

1. A maintenance device for online replacement of pipeline thermocouples, characterized in that: It includes a sealing cylinder (1), a sealing rod (2), a blocking component, a connecting cylinder (3), and a top sealing mechanism; a hole is provided at the top of the pipe, and the connecting cylinder (3) is set in the hole at the top of the pipe, and the outer wall of the connecting cylinder (3) is welded to the inner wall of the hole at the top of the pipe; the bottom end of the blocking component is connected to the top end of the connecting cylinder (3); the sealing cylinder (1) is set at the top end of the blocking component; the sealing rod (2) is set inside the sealing cylinder (1); and the top sealing mechanism is set at the top end of the sealing cylinder (1).

2. The maintenance device for online replacement of pipeline thermocouples according to claim 1, characterized in that: The blocking component includes a square closed frame (4), a sealing plate (5), and a discharge valve (6); the bottom end face of the square closed frame (4) is provided with a bottom hole, and the top end face of the square closed frame (4) is provided with a top hole, and the top hole is located directly above the bottom hole; the side wall of the square closed frame (4) is provided with a square hole, and the inner walls on both sides of the square closed frame (4) are provided with sliding grooves; the sealing plate (5) is inserted into the square hole on the side wall of the square closed frame (4), and the two sides of its end are respectively The sliding groove is set in the inner wall of the square closed frame (4) on both sides; a sealing ring is provided on the inner wall of the square hole of the square closed frame (4); the unloading valve (6) is set at the bottom of the side wall of the square closed frame (4) and it is connected to the inner cavity of the square closed frame (4); the inner diameter of the top hole, the inner diameter of the bottom hole of the square closed frame (4) and the inner diameter of the sealing cylinder (1) are the same, and the bottom of the inner wall of the sealing cylinder (1) is matched and connected to the top of the top hole of the square closed frame (4).

3. The maintenance device for online replacement of pipeline thermocouples according to claim 2, characterized in that: The sealing rod (2) has multiple annular grooves on its outer circumference, and sealing rings are provided in the annular grooves; each sealing ring on the outer wall of the sealing rod (2) is pressed tightly against the inner wall of the sealing cylinder (1); a fine hole is provided at the center of the sealing rod (2) along its length; a handle is provided at the top of the sealing rod (2); a sealing gasket is provided at the bottom of the sealing rod (2), and a perforation is provided at the center of the sealing gasket, the position of which matches the bottom of the fine hole of the sealing rod (2).

4. The maintenance device for online replacement of pipeline thermocouples according to claim 3, characterized in that: The top sealing mechanism includes a top cover (7), a junction box (8), and a top sealing cylinder (9); the top sealing cylinder (9) is located at the center of the bottom end face of the top cover (7); the junction box (8) is located on the top surface of the top cover (7), and the center of the top cover (7) is provided with a fine hole along its axis; the outer wall of the top sealing cylinder (9) is provided with a sealing ring, and this sealing ring is pressed tightly against the top of the inner wall of the sealing cylinder (1); the outer edge of the top cover (7) is provided with several threaded holes, and the top surface of the sealing cylinder (1) is provided with corresponding threaded holes, and the bolt passes through the threaded holes of the top cover (7) and the threaded holes of the sealing cylinder (1) at the same time.

5. The maintenance device for online replacement of pipeline thermocouples according to claim 4, characterized in that: The tail wire of the thermocouple (10) passes through the central perforation of the sealing gasket, the central hole of the sealing rod (2), and the central hole of the top cover (7) in sequence, and then connects with the junction box (8); the tail of the thermocouple (10) presses against the center of the bottom end face of the sealing gasket.

Images