Pressure and temperature integrated transmitter

Abstract

The utility model provides a kind of pressure temperature integrated transmitter, it makes for the thread diameter of liquid inlet end butt joint to be small, make the whole structure adapt to the measurement position of small aperture, and the function originally completed by two kinds of transmitter, combine as a kind of transmitter to complete, and performance index is not lower than separate temperature transmitter, pressure transmitter.It includes: thin-walled tube;Joint assembly, it includes outer convex joint, connecting end, oiling core body placement end, the outer ring of the outer convex joint is provided with outer thread, the outer thread is used to butt joint connecting hole, the outer convex joint is convex to the center position of connecting end, the center of the outer convex joint is provided with through hole, the side position corresponding to the through hole of the outer convex joint is provided with pressure inlet hole;Sleeve assembly, it includes the joint installation stopper of front end, sleeve body, sleeve rear end plate, socket mounting hole is provided on the sleeve rear end plate;Socket;And built-in device, it includes oiling core body, transmitter board assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of instrumentation, specifically to an integrated pressure and temperature transmitter. Background Technology

[0002] The PT100 temperature transmitter measures temperature based on the resistive thermal effect, meaning the resistance of a resistor changes with temperature. Therefore, by measuring the resistance change of the temperature-sensing resistor, the temperature can be determined. The PT100 is a metal resistance temperature detector (RTD), generally characterized by high resistivity and a stable temperature coefficient. It is used for temperature measurement in the range of -200℃ to 500℃, and is characterized by accurate measurement, good stability, and reliable performance, making it widely used in automatic control applications.

[0003] A diffused silicon oil injection core sensor is a detection device that senses the pressure information being measured and converts this information into an electrical signal output according to a certain rule to meet the requirements of information transmission, processing, storage, and control. Diffused silicon oil injection core sensors are reliable, stable, small in size, lightweight, and cost-effective.

[0004] Currently, integrated temperature and level transmitters are available on the market, where the entire transmitter is immersed in the liquid for measurement. Integrated pressure and temperature transmitters are less common. Typically, the pressure inlet is located in the middle of the front of the connector, the temperature probe is positioned eccentrically, and a cavity housing the pressure sensor is welded to the rear of the connector. This design has drawbacks: high cost, large mounting threads, and in some field applications with small mounting holes, it cannot be installed, necessitating separate temperature and pressure transmitters, leading to high installation costs. To address pressure and temperature measurements at locations with small mounting holes, there is an urgent need to develop an integrated pressure and temperature transmitter that can adapt to such installation positions. Utility Model Content

[0005] To address the aforementioned issues, this invention provides an integrated pressure and temperature transmitter, which reduces the diameter of the thread used to connect to the medium inlet, making the entire structure adaptable to measurement positions with small orifices. Furthermore, it combines the functions originally performed by two transmitters into one transmitter, and its performance is no less than that of a separate temperature transmitter or pressure transmitter.

[0006] A pressure and temperature integrated transmitter, characterized in that it comprises:

[0007] Thin-walled tubes;

[0008] A connector assembly includes a protruding connector, a connecting end, and an oil injection core placement end. The outer circumference of the protruding connector is provided with an external thread for mating with a connecting hole. The protruding connector protrudes beyond the center of the connecting end. A through hole is provided at the center of the protruding connector. A pressure inlet hole is provided on the side of the protruding connector corresponding to the through hole. The oil injection core placement end is provided with an oil injection core mounting cavity. The pressure inlet hole communicates with the oil injection core mounting cavity.

[0009] A sleeve assembly includes a front-end connector mounting stop, a sleeve body, and a sleeve rear end plate, wherein the sleeve rear end plate is provided with a socket mounting hole;

[0010] socket;

[0011] And built-in components, including an oil injection core and a transmitter plate assembly;

[0012] The thin-walled tube contains a platinum resistance thermometer, and the thin-walled tube is fixed to the front end of the through hole and protrudes forward.

[0013] In the assembled state, the outer ring stop of the connecting end is fitted onto the joint mounting stop, the oil injection core placement end and the built-in device are both located in the cavity of the sleeve body, the socket is sealed and inserted into the socket mounting hole, the temperature signal line of the platinum resistance passes through the through hole and is connected to the corresponding connection position of the transmitter plate assembly along the guide space formed by the oil injection core placement end and the sleeve body, and the oil injection core is fixedly installed in the oil injection core mounting cavity.

[0014] Its further features are:

[0015] The transmitter plate assembly includes an adapter plate, a pressure transmitter plate, and a temperature transmitter plate. The adapter plate is connected to the rear protruding pin of the oil injection core, and the pressure transmitter plate and the temperature transmitter plate are respectively fixed on the protruding pins of the adapter plate.

[0016] The platinum resistance thermometer is located in the inner cavity of the thin-walled tube and is sealed with adhesive. The through hole includes a front thin-walled tube positioning part and a rear through guide part. The rear end of the thin-walled tube is positioned and installed on the front thin-walled tube positioning part and then welded and fixed.

[0017] The temperature signal line passes through the rear guide portion, extends radially outward, and then extends axially backward to the corresponding position of the temperature transmitter board. After that, the temperature signal line is connected to the corresponding connection position of the temperature transmitter board.

[0018] A radial communication notch is provided at the rear of the connection end. A gap is left between the outer circumference of the oil injection core placement end and the inner wall of the sleeve body. The temperature signal line is connected along the radial communication notch and the gap until it is connected to the connection position of the temperature transmitter plate.

[0019] The thin-walled tube is provided with an axial stop ring, and the center position of the external convex joint protrudes forward to form a guide sleeve. The axial stop ring of the thin-walled tube is arranged close to the front end face of the guide sleeve and welded to form a weld seam, which makes the assembly of the thin-walled tube quick and reliable.

[0020] When the pressure range is ≤3.5MPa, a vent hole is provided on the rear annular wall of the sleeve body; when the pressure range is >3.5MPa, there is no vent hole.

[0021] A sealing ring is provided between the socket and the socket mounting hole, and the inner end of the socket is connected to the pressure transmitter plate and the temperature transmitter plate through a wire;

[0022] A sealing groove is provided at the position of the connecting end corresponding to the external protrusion joint, and a sealing ring is embedded in the sealing groove to ensure the sealing during the installation of the finished product.

[0023] When the pressure range is ≤10MPa, the oil injection core is placed in the oil injection core mounting cavity and welded to the outside.

[0024] When the pressure range is greater than 10MPa, the weld cannot withstand the pressure. The outer ring wall at the rear end of the oil injection core mounting cavity is provided with an internal thread structure. The small oil injection core plug is installed in the oil injection core mounting cavity and is pressed into the outer ring area at the rear end of the oil injection core by a pressure ring. The pressure ring is threaded to the internal thread structure.

[0025] A method for manufacturing an integrated pressure and temperature transmitter includes the following steps:

[0026] a. Solder the platinum resistance thermometer to the high-temperature resistant temperature signal transmission line, and wrap the connection point with high-temperature resistant polyimide tape;

[0027] b. Platinum resistance thermometers are inserted into thin-walled tubes, adhesive is poured into the thin-walled tubes, and the thin-walled tubes are placed in an oven and baked and cured at a temperature above 120°C.

[0028] c. The thin-walled tube is inserted into the front end of the externally protruding joint, and the temperature signal transmission line of the platinum resistance thermometer is connected to the rear end through a Z-shaped route. The joint between the thin-walled tube and the externally protruding joint is sealed and welded with a laser welding machine.

[0029] d. Insert the oil injection core into the oil injection core mounting cavity at the rear of the connector. Seal the joint between the oil injection core mounting cavity and the rear of the oil injection core with a laser welding machine. When the pressure range is >10MPa, use a smaller oil injection core and fix it at the rear with a pressure ring.

[0030] e. Weld an adapter plate to the pins of the oil injection core, weld pins to the adapter plate to connect the pressure transmitter plate and the temperature transmitter plate, and connect the temperature signal transmission line to the corresponding connection position on the temperature transmitter plate.

[0031] f. The pressure transmitter and temperature transmitter are debugged, and the process proceeds to the next step after all indicators are qualified.

[0032] g. Install the sleeve assembly at the connecting end of the connector assembly, insert the socket into the socket mounting hole of the sleeve assembly, and seal it with a sealing ring. Then, use a laser welding machine to weld the mating stop between the connector and the sleeve. The tail end of the sleeve assembly can be modified according to the socket shape requirements to change the corresponding structure and cable outlet form, such as the Hossman socket and the Parker socket.

[0033] By adopting the above technical solution, the connector assembly is manufactured independently, including a centrally located protruding connector. The radial center of the protruding connector is used to align with a thin-walled tube containing a platinum resistance thermometer. A pressure inlet hole for pressure testing is located on the side of the center of the protruding connector, connecting to the oil injection core mounting cavity. Since the temperature sensing part and pressure inlet part of the protruding connector are both located at the front end face of the protruding connector, the entire outer circumference of the protruding connector is provided with external threads, allowing for proper assembly with the corresponding position of the medium to be measured. By making the protruding connector, connecting end, and oil injection core placement end into a single component, the diameter of its external thread can be as small as M12. This combines the functions originally performed by two transmitters into one transmitter, and the performance indicators are no less than those of separate temperature and pressure transmitters. Attached Figure Description

[0034] Figure 1 This is a cross-sectional view of the present invention;

[0035] Figure 2 This is a cross-sectional schematic diagram of the assembly of the thin-walled tube and platinum resistance thermometer of this utility model;

[0036] Figure 3 This is a structural cross-sectional schematic diagram of a specific embodiment of the connector assembly of this utility model;

[0037] Figure 4 This is a cross-sectional view of a specific embodiment of the connector assembly of this utility model; the names corresponding to the serial numbers in the figure are as follows:

[0038] Thin-walled tube 10, axial stop ring 101, platinum resistance thermometer 11, temperature signal line 12, adhesive 13, connector assembly 20, sleeve assembly 30, connector mounting stop 31, sleeve body 32, vent hole 321, sleeve rear end plate 33, socket mounting hole 34, socket 40, built-in device 50, oil injection core 51, adapter plate 52, pressure transmitter plate 53, temperature transmitter plate 54, externally protruding connector 60, guide sleeve 601, external thread 61, through hole 62, front thin-walled tube positioning part 621, rear through guide part 622, pressure inlet hole 63, connecting end 70, outer ring stop 701, radial connecting notch 71, spacing 72, sealing groove 73, oil injection core placement end 80, oil injection core mounting cavity 81, internal thread structure 811, pressure ring 82, weld 83, sealing ring 90. Detailed Implementation

[0039] A pressure and temperature integrated transmitter, see Figures 1-4 It includes a thin-walled tube 10, a connector assembly 20, a sleeve assembly 30, a socket 40, and a built-in device 50;

[0040] The connector assembly 20 includes a protruding connector 60, a connecting end 70, and an oil injection core placement end 80. The outer circumference of the protruding connector 60 is provided with an external thread 61, which is used to mate with the connecting hole. The protruding connector 60 protrudes outward from the center of the connecting end 70. The center of the protruding connector 60 is provided with a through hole 62. The side position of the protruding connector 60 corresponding to the through hole 62 is provided with a pressure inlet hole 63. The oil injection core placement end 80 is provided with an oil injection core mounting cavity 81, and the pressure inlet hole 63 communicates with the oil injection core mounting cavity 81.

[0041] The sleeve assembly 30 includes a front end connector mounting stop 31, a sleeve body 32, and a sleeve rear end plate 33, with a socket mounting hole 34 provided on the sleeve rear end plate 33.

[0042] The built-in device 50 includes an oil injection core 51, an adapter plate 52, a pressure transmitter plate 53, and a temperature transmitter plate 54.

[0043] A platinum resistance thermometer 11 is encapsulated inside the thin-walled tube 10. The thin-walled tube 10 is fixed to the front end of the through hole 62 and protrudes forward.

[0044] In the assembled state, the outer ring stop 701 of the connecting end 70 is fitted onto the connector mounting stop 31. The oil injection core placement end 80 and the built-in device 50 are both located in the cavity of the sleeve body 32. The socket 40 is sealed and inserted into the socket mounting hole 34. The temperature signal line 12 of the platinum resistance 11 passes through the through hole 62 and is connected to the corresponding connection position of the temperature transmitter plate 54 along the guide space formed by the oil injection core placement end 80 and the sleeve body 32. The oil injection core 51 is fixedly installed in the oil injection core mounting cavity 81.

[0045] In a specific embodiment, the oil-filling core 51 is a diffused silicon oil-filling core, and the platinum resistance is a PT100 platinum resistance.

[0046] In a specific embodiment, the adapter plate 52 is connected to the rear protruding pin of the oil injection core 51, and the pressure transmitter plate 53 and the temperature transmitter plate 54 are respectively fixed on the protruding pins of the adapter plate 52.

[0047] The platinum resistance 11 is located in the inner cavity of the thin-walled tube 10 and is encapsulated by adhesive 13. The through hole 62 includes a front thin-walled tube positioning part 621 and a rear through guide part 622. The rear end of the thin-walled tube 10 is positioned and installed on the front thin-walled tube positioning part 621 and then welded and fixed.

[0048] After the temperature signal line 12 passes through the rear guide portion 622, it extends radially outward and then axially backward to the corresponding position of the temperature transmitter plate 54. After that, the temperature signal line 12 and the corresponding connection position of the temperature transmitter plate 54 are connected.

[0049] In specific implementation, a radial communication notch 71 is provided at the rear of the connection end 70, and a gap 72 is left between the outer circumference of the oil injection core placement end 80 and the inner wall of the sleeve body 32. The temperature signal line 12 is connected along the radial communication notch 71 and the gap 72 until it is connected to the connection position of the temperature transmitter plate 54.

[0050] In specific implementation, the thin-walled tube 10 is provided with an axial stop ring 101, and the center position of the outwardly protruding joint 60 protrudes forward to form a guide sleeve 601. The axial stop ring 101 of the thin-walled tube 10 is arranged close to the front end face of the guide sleeve 601 and welded to form a weld seam, which makes the assembly of the thin-walled tube 10 fast and reliable.

[0051] In specific implementation, when the pressure range is ≤3.5MPa, a vent hole 321 is provided on the rear annular wall of the sleeve body 32, and when the pressure range is >3.5MPa, there is no vent hole 321.

[0052] In practice, a sealing ring 90 is provided between the socket 40 and the socket mounting hole 34, and the inner end of the socket 40 is connected to the pressure transmitter plate 53 and the temperature transmitter plate 54 through a wire.

[0053] A sealing groove 73 is provided at the position of the connecting end 70 corresponding to the position of the protruding joint 60. A sealing ring is embedded in the sealing groove 73 to ensure the sealing during the installation of the finished product.

[0054] In the first specific embodiment, when the pressure range is ≤10MPa, the oil injection core 51 is placed in the oil injection core mounting cavity 81 and welded to the outside to form a weld 83 for fixation.

[0055] In the second specific embodiment, when the pressure range is >10MPa, the weld cannot withstand the pressure. The outer ring wall of the rear end of the oil injection core mounting cavity 81 is provided with an internal thread structure 811. The small oil injection core 51 is plugged into the oil injection core mounting cavity 81 and pressed into the outer ring area of ​​the rear end of the oil injection core 51 by the pressure ring 82. The pressure ring 82 is threadedly connected to the internal thread structure 811.

[0056] A method for manufacturing an integrated pressure and temperature transmitter includes the following steps:

[0057] a. Solder the platinum resistance 11 to the high-temperature resistant temperature signal transmission line 12, and wrap the connection point with high-temperature resistant polyimide tape.

[0058] b. Platinum resistance thermometer 11 is inserted into thin-walled tube 10, adhesive is poured into thin-walled tube 10, and thin-walled tube 10 is placed in an oven and baked and cured at a temperature above 120°C.

[0059] c. The thin-walled tube 10 is inserted into the front end of the externally protruding joint 60. The temperature signal transmission line 12 of the platinum resistance 11 is connected to the rear end through a Z-shaped route. The joint between the thin-walled tube 10 and the externally protruding joint 60 is sealed and welded with a laser welding machine.

[0060] d. Insert the oil injection core 51 into the oil injection core mounting cavity 81 at the rear of the connector assembly 20, and seal the joint between the oil injection core mounting cavity 81 and the rear of the oil injection core 51 using a laser welding machine (see...). Figure 3 When the pressure range is >10MPa, a smaller oil injection core 51 is used, and the rear is fixed with a pressure ring 82 (see...). Figure 4 );

[0061] e. Weld an adapter plate 52 onto the pins of the oil injection core 51. Weld pins onto the adapter plate 52 to connect the pressure transmitter plate 53 and the temperature transmitter plate 54. At the same time, connect the temperature signal transmission line 12 to the corresponding connection position of the temperature transmitter plate 54.

[0062] f. The pressure transmitter plate 53 and temperature transmitter plate 54 are debugged, and after all indicators are qualified, they proceed to the next process.

[0063] g. Install the sleeve assembly 30 at the connecting end 60 of the connector assembly 20. Insert the socket 40 into the socket mounting hole 34 of the sleeve assembly 30 and seal it with a sealing ring. Then, use a laser welding machine to weld the mating stop 31 of the connector assembly 20 and the sleeve assembly 30. The tail end of the sleeve assembly 30 can be modified according to the shape of the socket 40 to change the corresponding structure and the outgoing wire form, such as the Hossman socket or the Parker socket.

[0064] Its working principle is as follows: The connector assembly is manufactured independently, including a centrally located protruding connector. The radial center of the protruding connector is used to align with a thin-walled tube containing a platinum resistance thermometer. A pressure inlet hole for pressure testing is located on the side of the center of the protruding connector, which connects to the oil injection core mounting cavity. Since the temperature sensing part and pressure inlet part of the protruding connector are both located at the front end of the protruding connector, the entire outer circumference of the protruding connector is provided with external threads, allowing for proper assembly with the corresponding position of the medium to be measured. The protruding connector, connecting end, and oil injection core placement end are made into a single part, so the diameter of its external thread can be as small as M12. This combines the functions originally performed by two transmitters into one transmitter, and the performance indicators are no less than those of separate temperature and pressure transmitters.

[0065] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pressure and temperature integrated transmitter, characterized in that, It includes: Thin-walled tubes; A connector assembly includes a protruding connector, a connecting end, and an oil injection core placement end. The outer circumference of the protruding connector is provided with an external thread for mating with a connecting hole. The protruding connector protrudes beyond the center of the connecting end. A through hole is provided at the center of the protruding connector. A pressure inlet hole is provided on the side of the protruding connector corresponding to the through hole. The oil injection core placement end is provided with an oil injection core mounting cavity. The pressure inlet hole communicates with the oil injection core mounting cavity. A sleeve assembly includes a front-end connector mounting stop, a sleeve body, and a sleeve rear end plate, wherein the sleeve rear end plate is provided with a socket mounting hole; socket; And built-in components, including an oil injection core and a transmitter plate assembly; The thin-walled tube contains a platinum resistance thermometer, and the thin-walled tube is fixed to the front end of the through hole and protrudes forward. In the assembled state, the outer ring stop of the connecting end is fitted onto the joint mounting stop, the oil injection core placement end and the built-in device are both located in the cavity of the sleeve body, the socket is sealed and inserted into the socket mounting hole, the temperature signal line of the platinum resistance passes through the through hole and is connected to the corresponding connection position of the transmitter plate assembly along the guide space formed by the oil injection core placement end and the sleeve body, and the oil injection core is fixedly installed in the oil injection core mounting cavity.

2. The pressure and temperature integrated transmitter according to claim 1, characterized in that: The transmitter plate assembly includes an adapter plate, a pressure transmitter plate, and a temperature transmitter plate. The adapter plate is connected to the rear protruding pin of the oil injection core, and the pressure transmitter plate and the temperature transmitter plate are respectively fixed on the protruding pins of the adapter plate.

3. The pressure and temperature integrated transmitter according to claim 2, characterized in that: The platinum resistance thermometer is located in the inner cavity of the thin-walled tube and is sealed with adhesive. The through hole includes a front thin-walled tube positioning part and a rear through guide part. The rear end of the thin-walled tube is positioned and installed on the front thin-walled tube positioning part and then welded and fixed.

4. The pressure and temperature integrated transmitter according to claim 3, characterized in that: The temperature signal line passes through the rear guide portion, extends radially outward, and then extends axially backward to the corresponding position on the temperature transmitter board. After that, the temperature signal line is connected to the corresponding connection position on the temperature transmitter board.

5. A pressure and temperature integrated transmitter according to claim 4, characterized in that: A radially communicating notch is provided at the rear of the connecting end. A gap is left between the outer circumference of the oil injection core placement end and the inner wall of the sleeve body. The temperature signal line is connected along the radially communicating notch and the gap until it connects with the temperature transmitter plate.

6. A pressure and temperature integrated transmitter according to claim 4, characterized in that: The thin-walled tube is provided with an axial stop ring, and the center position of the convex joint protrudes forward to form a guide sleeve. The axial stop ring of the thin-walled tube is arranged close to the front end face of the guide sleeve and welded to form a weld seam.

7. The pressure and temperature integrated transmitter according to claim 1, characterized in that: When the pressure range is ≤3.5MPa, a vent hole is provided on the rear annular wall of the sleeve body; when the pressure range is >3.5MPa, there is no vent hole.

8. A pressure and temperature integrated transmitter according to claim 2, characterized in that: A sealing ring is provided between the socket and the socket mounting hole, and the inner end of the socket is connected to the pressure transmitter plate and the temperature transmitter plate through a wire.

9. A pressure and temperature integrated transmitter according to claim 1, characterized in that: A sealing groove is provided at the position of the connecting end corresponding to the external protrusion joint, and a sealing ring is embedded in the sealing groove.

10. A pressure and temperature integrated transmitter according to claim 1, characterized in that: When the pressure range is ≤10MPa, the oil injection core is placed in the oil injection core mounting cavity and welded to the outside. When the pressure range is greater than 10MPa, the weld cannot withstand the pressure. The outer ring wall at the rear end of the oil injection core mounting cavity is provided with an internal thread structure. The small oil injection core plug is installed in the oil injection core mounting cavity and is pressed into the outer ring area at the rear end of the oil injection core by a pressure ring. The pressure ring is threaded to the internal thread structure.

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