Circulating water integrated temperature-variable casing pressure plugging structure and plugging method

Abstract

The present invention belongs to the technical field of chemical production pipeline fault repair and detection technology, and specifically relates to a circulating water integrated temperature-variable sleeve pressure-sealing leak plugging structure, comprising an integrated temperature transmitter, a ball valve, and a temperature sleeve. The armored thermal resistor of the integrated temperature transmitter is inserted into the temperature sleeve through the ball valve. The end of the temperature sleeve is connected to one end of the ball valve via a lower conversion joint, and the other end of the ball valve is connected to the integrated temperature transmitter via a welded joint. The present invention utilizes the existing structure, adding a ball valve, upper and lower joints, a ferrule joint, and a sealing strip to solve the two problems of temperature sleeve leak plugging and temperature measurement. The modification is simple, the method is ingenious and reliable, and can ensure the normal and long-term operation of the circulating water system.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical production pipeline fault maintenance and detection, and particularly relates to a circulating water integrated temperature-variable sleeve pressure plugging structure. Background Art

[0002] In chemical production, the temperature of circulating water in underground wells must be strictly controlled. A commonly used measuring element is an integrated temperature transmitter, also known as an integrated temperature transmitter. These transmitters, also called monoblocks, integrate a temperature measuring element (such as a thermocouple or RTD) with a temperature conversion module. They are compact and directly output a 4-20mA current signal. Some integrated temperature transmitters also include a display, integrating temperature sensing, transmission, and display. A leak in the circulating water thermometer casing, which monitors water temperature, can cause pressurized water to come into direct contact with the integrated temperature transmitter's measuring tip. Water can even enter the temperature conversion module's indicator, causing the integrated temperature transmitter to malfunction. The water pressure inside the casing equals the network pressure, approximately 0.5 MPa, causing water to leak and splash out from the threads. This poses a significant safety hazard to the normal operation of the circulating water system and makes temperature measurement impossible. Directly replacing the temperature casing is risky; if it is not properly installed, the entire system could shut down. Summary of the Invention

[0003] In view of the defects of the above-mentioned prior art, the purpose of the present invention is to provide a circulating water integrated temperature-variable sleeve pressure plugging structure, which is improved on the basis of the existing structure to ensure the normal long-term operation of the circulating water system.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a circulating water integrated temperature-variable sleeve pressure plugging structure, including an integrated temperature transmitter, a lower conversion joint, a welding joint, a ball valve and a temperature sleeve; the armored thermal resistor of the integrated temperature transmitter is inserted into the temperature sleeve through the ball valve, the end of the temperature sleeve is connected to one end of the ball valve through the lower conversion joint, and the other end of the ball valve is connected to the integrated temperature transmitter through a welding joint.

[0005] Furthermore, the integrated temperature transmitter is inserted into the temperature sleeve and the thermal resistor is a φ6mm armored platinum resistance sensor.

[0006] Furthermore, the lower conversion joint is an M20*1.5 to 1 / 2NPT short-circuit conversion joint, the lower end of the lower conversion joint is connected to the internal thread of the temperature sleeve, and the upper end of the lower conversion joint is connected to the ball valve, and the ball valve is a 1 / 2NPT ball valve.

[0007] Furthermore, the welded joint is formed by welding a φ6mm terminal ferrule joint and an upper conversion joint.

[0008] Furthermore, the φ6mm terminal ferrule joint is connected to an appropriate position at the lower end of the φ6mm armored platinum resistance sensor, and the upper conversion joint is connected to the ball valve.

[0009] Furthermore, a sealing strip is provided at the connection between the welded joint and the integrated temperature transmitter. This strip is located at the connection between the upper adapter and the ball valve. It blocks the upper passage of the ball valve, reducing water pressure while preventing circulating water from splashing out or even onto the meter head. This prevents the measurement of the integrated temperature transmitter and prevents leakage and splashing of circulating water.

[0010] Preferably, the sealing strip is a white cloth strip coated with sealant.

[0011] Furthermore, the circulating water pipeline is welded with a connecting pipe, a lower flange is provided at the end of the connecting pipe, an upper flange is welded on the temperature sleeve, the temperature sleeve and the connecting pipe are connected through the upper flange and the lower flange, and the temperature sleeve passes through the connecting pipe and extends into the circulating water pipeline.

[0012] Based on the above technical solution, the temperature sleeve with flange is made of 316LL white steel bar material drilled and welded with a standard flange. The temperature sleeve is inserted into the welded connecting pipe and lower flange on the circulating water pipeline to directly contact the circulating water.

[0013] The method for sealing leaks under pressure using an integrated temperature-variable casing for circulating water is characterized by comprising the following steps:

[0014] Step 1: Prepare a ball valve, connect the lower adapter to the lower end of the ball valve, and match the other end of the lower adapter with the internal thread of the temperature sleeve;

[0015] Step 2: Prepare a platinum resistance sensor, weld the terminal ferrule connector and the upper conversion connector to form a welded joint, connect the terminal ferrule connector to the end of the platinum resistance sensor, and wrap a sealing tape around the upper conversion connector;

[0016] Step 3: Remove the original platinum resistance sensor from the integrated temperature transmitter, open the ball valve with the lower conversion joint and install it into the temperature sleeve (because the water pressure is 0.5MPa, it is impossible to install it in the center without opening it), and close the ball valve after installation;

[0017] Step 4: Insert the platinum resistance sensor with the sealing strip into the upper end of the ball valve, open the ball valve, and insert the platinum resistance sensor into the temperature measuring position in the temperature sleeve. At this time, water will flow out from the terminal ferrule joint. Use a wrench to screw the thread of the welding joint into the upper interface of the ball valve, press the sealing strip until the water stops flowing out, apply an appropriate amount of sealant to the terminal ferrule joint and tighten the terminal ferrule joint; seal the ball valve and the terminal ferrule joint.

[0018] Step 5: Seal the terminal ferrule connector with sealant, connect the signal line, and ensure that the temperature indication is normal and there is no water leakage.

[0019] Furthermore, the platinum resistance sensor prepared in step 2 is 150 mm longer than the original platinum resistance sensor.

[0020] The beneficial effects of the present invention are: utilizing the existing structure, adding a ball valve, upper and lower joints, a ferrule joint and a sealing strip, solving the two problems of water leakage and temperature measurement of the temperature sleeve. The modification is simple, the method is ingenious and reliable, and can ensure the normal long-term operation of the circulating water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The integrated temperature transmitter for pressure plugging after transformation;

[0022] Figure: 1. Integrated temperature transmitter, 2. Ball valve, 3. Connection pipe between lower flange and circulating water pipe, 4. Armored platinum resistance sensor, 5. Lower adapter, 6. Welding joint, 6.1 Terminal ferrule connector, 6.2 Upper adapter, 7. Sealing strip, 8. Flange-mounted temperature sleeve, 9. Circulating water pipe. DETAILED DESCRIPTION

[0023] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] See attached Figure 1 , the pressure-sealing leak-proof structure of the integrated temperature-variable sleeve for circulating water includes an integrated temperature transmitter 1, a ball valve 2, a welding joint 6, a lower conversion joint 5 and a sealing strip 7; the thermal resistance sensor of the integrated temperature transmitter 1 is inserted into the temperature sleeve through the ball valve 2, the temperature sleeve is connected to one end of the ball valve 2 through the lower conversion joint 5, and the other end of the ball valve 2 is connected to the integrated temperature transmitter 1 through the welding joint 6, and the terminal compression sleeve joint 6.1 of the welding joint 6 is sealed and fixed with a compression sleeve at the connection with the integrated temperature transmitter 1; the sealing strip 7 is pressed to the upper channel of the ball valve with the thread of the welding joint 6, which reduces the water pressure while preventing the circulating water from leaking out or even splashing onto the meter head, which will not affect the measurement of the integrated temperature transmitter and prevents the circulating water from leaking out and splashing.

[0025] Furthermore, the integrated temperature transmitter 1 includes a 6mm diameter armored platinum resistance sensor 4 inserted into the thermowell. The integrated temperature transmitter 1 is connected to the thermowell via a ball valve 2, a lower adapter 5, and a welded joint 6. The armored platinum resistance sensor 4 extends through the welded joint 6, ball valve 2, lower adapter 5, and thermowell into the circulating water pipeline.

[0026] Furthermore, the lower conversion joint is an M20*1.5 to 1 / 2NPT short-circuit conversion joint, the lower end of the lower conversion joint 5 is connected to the internal thread of the temperature sleeve, and the upper end of the lower conversion joint is connected to the ball valve 2, and the ball valve is a 1 / 2NPT ball valve.

[0027] Furthermore, the welded joint 6 is formed by welding a terminal ferrule joint 6.1 and an upper conversion joint 6.2.

[0028] Furthermore, the terminal ferrule connector 6.1 is connected to an appropriate position of the integrated temperature transmitter, and the upper conversion connector 6.2 is connected to the ball valve 2.

[0029] Furthermore, the sealing strip 7 is provided at the connection between the upper conversion joint 6.2 and the ball valve 2.

[0030] Preferably, the sealing strip is a white cloth strip coated with sealant.

[0031] Furthermore, the circulating water pipeline is welded with a connecting pipe, a lower flange is provided at the end of the connecting pipe, an upper flange is welded on the temperature sleeve, the temperature sleeve and the connecting pipe are connected through the upper flange and the lower flange, and the temperature sleeve passes through the connecting pipe and extends into the circulating water pipeline.

[0032] Based on the above technical solution, the temperature sleeve with flange is made of 316LL white steel bar material drilled and welded with a standard flange. The temperature sleeve is inserted into the welded connecting pipe and lower flange on the circulating water pipeline to directly contact the circulating water.

[0033] Leakage plugging method: The circulating water temperature indication is inaccurate. After inspection, the temperature sleeve is leaking and it is very serious. The water pressure in the temperature sleeve is equal to the pipe network pressure, which is about 0.5MPa. After twisting the M20*1, 5 threads, it is found that the leakage is very large. It is decided to add a 1 / 2NPT ball valve and use the M20*1, 5 to 1 / 2NPT lower conversion joint 5 to connect the ball valve 2 and match it with the internal thread of the temperature sleeve; because the thermal resistance sensor inserted into the sleeve of the integrated temperature transmitter is a φ6mm armored platinum resistance sensor 4, a φ6mm terminal compression joint 6.1 is welded with a 1 / 2NPT short-circuit upper conversion joint 6.2 as the welding joint connected to the upper end of the ball valve 2. Because there is a section smaller than φ6mm inside the φ6mm terminal compression joint, it is processed to φ6mm using a drill press. A platinum resistance sensor that is 150mm longer than the original one is taken out from the warehouse and the welded welding joint is connected. 6 is installed on the lower end of the armored platinum resistance sensor 4, and an appropriate amount of white cloth strips with sealant are wrapped around this part to reduce the water pressure; when ready, remove the original temperature sensor and open the ball valve 2. Because the water pressure is 0.5MPa, it is impossible to install it in the center without opening the ball valve. Install the ball valve 2 with the lower conversion joint 5 under pressure, close the ball valve 2, insert the armored platinum resistance sensor 4 with the white cloth strips into the upper end of the ball valve 2, open the ball valve 2, and slowly insert the armored platinum resistance sensor 4 into the temperature sleeve. At this time, a small amount of water will flow out from the φ6mm terminal card sleeve joint 6.1. Use a wrench to screw the welding joint thread into the upper interface of the ball valve, press the sealing strip until water stops flowing out, apply an appropriate amount of sealant to the terminal card sleeve joint and tighten the terminal card sleeve joint; seal the card sleeve joint with sealant, connect the signal line, the temperature indication is normal, there is no water leakage, and the normal and long-term operation of the circulating water system is guaranteed.

[0034] The present invention utilizes existing materials, adds valves, manufactures ferrule joints, and wraps an appropriate amount of white cloth strips coated with sealant around the lower end of a platinum resistance sensor to reduce or lower water pressure and perform online leak plugging of a temperature sleeve, thereby successfully solving both the leak plugging and online temperature measurement problems.

[0035] The above examples are merely preferred embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and many variations are possible. All variations that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered to be within the scope of protection of the present invention.

Claims

1. A method for sealing leaks under pressure using an integrated temperature-variable casing for circulating water, characterized by: The circulating water integrated temperature-variable sleeve pressure plugging structure includes an integrated temperature transmitter, a ball valve, a welding joint, a lower conversion joint and a temperature sleeve; the thermal resistor of the integrated temperature transmitter passes through the ball valve and is inserted into the temperature sleeve, the temperature sleeve is connected to one end of the ball valve through the lower conversion joint, and the other end of the ball valve is connected to the integrated temperature transmitter through a welding joint; The lower end of the lower conversion joint is connected to the internal thread of the temperature sleeve, and the upper end of the lower conversion joint is connected to the ball valve; The welding joint is formed by welding the terminal ferrule joint and the upper conversion joint; The terminal ferrule connector is connected to the integrated temperature transmitter, and the upper conversion connector is connected to the ball valve; A sealing strip is provided at the connection between the welding joint and the integrated temperature transmitter; The circulating water pipeline is welded with a connecting pipe, a lower flange is provided at the end of the connecting pipe, an upper flange is welded on the temperature sleeve, the temperature sleeve and the connecting pipe are connected through the upper flange and the lower flange, and the temperature sleeve passes through the connecting pipe and extends into the circulating water pipeline; The thermal resistor inserted into the temperature sleeve of the integrated temperature transmitter is an armored platinum resistance sensor; The pressure plugging method includes the following steps: Step 1: Prepare a ball valve, connect the lower adapter to the lower end of the ball valve, and match the other end of the lower adapter with the internal thread of the temperature sleeve; Step 2: Prepare a platinum resistance sensor, weld the terminal ferrule connector and the upper conversion connector to form a welded joint, connect the terminal ferrule connector to the end of the platinum resistance sensor, and wrap a sealing tape around the upper conversion connector; Step 3: Remove the original platinum resistance sensor from the integrated temperature transmitter, open the ball valve with the lower conversion joint and install it into the temperature sleeve, then close the ball valve; Step 4: Insert the platinum resistance sensor with the sealing strip into the upper end of the ball valve, open the ball valve, insert the platinum resistance sensor into the temperature measuring position in the temperature sleeve, and seal the ball valve and the terminal ferrule joint; Step 5: Seal the terminal ferrule connector with sealant, connect the signal line, and ensure that the temperature indication is normal and there is no water leakage.

2. The method for sealing leaks under pressure using an integrated temperature-variable casing for circulating water according to claim 1, characterized in that: The integrated temperature transmitter is inserted into the temperature sleeve and the thermal resistor is a φ6mm armored platinum resistance sensor.

3. The method for sealing leaks under pressure using an integrated temperature-variable casing for circulating water according to claim 1, characterized in that: The lower conversion joint is an M20*1,5 to 1 / 2NPT short-circuit conversion joint, and the ball valve is a 1 / 2NPT ball valve.

4. The method for sealing leaks under pressure using an integrated temperature-variable casing for circulating water according to claim 1, characterized in that: The sealing strip is a white cloth strip coated with sealant.

5. The method for sealing leaks under pressure using an integrated temperature-variable casing for circulating water according to claim 1, characterized in that: The platinum resistance sensor prepared in step 2 is 150 mm longer than the original platinum resistance sensor.

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