A detachable seal structure pressure transmitter

Abstract

The utility model relates to pressure transmitter technical field, specifically is a detachable sealed structure pressure transmitter, including upper clamping shell, lower clamping shell and hollow connecting rod, the upper clamping shell is clamped and is connected with the top of lower clamping shell, the inner top of lower clamping shell is provided with diaphragm groove, the inside of diaphragm groove is provided with O ring groove and is provided with O ring in O ring groove, the top of lower clamping shell and located diaphragm groove's outside bond have outer sealing ring, diaphragm groove is provided with pressure sensing diaphragm and the top of pressure sensing diaphragm is provided with pressure sensor, the top of pressure sensor is provided with pin, the circuit board is installed through the limiting seat in the upper clamping shell and is provided with the detection contact point corresponding with pin on the circuit board, pressure transmitter greatly improves pressure transmitter overall sealing, and the O ring is convenient to take down, and cutting separates the outer outer sealing ring and realizes replacement.

Description

Technical Field

[0001] This utility model relates to the field of pressure transmitter technology, specifically to a pressure transmitter with a detachable sealing structure. Background Technology

[0002] A pressure transmitter is an industrial automation instrument that converts pressure signals into standard electrical signals (such as 4-20mA DC). It is widely used in petrochemical, power, and water treatment industries for real-time monitoring and control of liquid, gas, or steam pressure. The pressure transmitter converts pressure into an electrical signal through a sensor core, which is then processed by a circuit board to output a standard signal. This signal is then supplied to secondary instruments such as indicators, alarms, recorders, and controllers for measurement, indication, and process regulation.

[0003] Existing pressure transmitters do not facilitate improving the overall sealing performance of the pressure transmitter, nor do they facilitate the removal of O-rings, nor do they facilitate the cutting and separation of the external sealing ring for quick replacement. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a pressure transmitter with a detachable sealing structure, which greatly improves the overall sealing performance of the pressure transmitter, facilitates the removal of the O-ring, and allows for quick replacement by cutting and separating the external sealing ring.

[0005] The technical solution adopted by this utility model to solve its technical problem is a detachable sealed pressure transmitter, including an upper housing, a lower housing and a hollow connecting rod. The upper housing is engaged with the top of the lower housing. A diaphragm groove is provided at the top of the lower housing. An O-ring groove is provided on the inner side of the diaphragm groove and an O-ring is provided in the O-ring groove. An outer sealing ring is adhered to the top of the lower housing and outside the diaphragm groove.

[0006] A pressure-sensitive isolation diaphragm is provided in the diaphragm groove, and a pressure sensor is provided on the top of the pressure-sensitive isolation diaphragm. The pressure sensor has pins on its top. A circuit board is installed in the upper housing through a limiting seat, and the circuit board has detection contacts corresponding to the pins.

[0007] By adopting the above technical solution, the pressure transmitter's overall sealing performance is greatly improved, making it easier to remove the O-ring and replace the external sealing ring by cutting and separating it.

[0008] Specifically, guide rods are provided on both sides of the pin, and guide cylinders are provided on the circuit board on both sides of the detection contact, with the guide rods located inside the guide cylinders.

[0009] Specifically, the bottom of the lower casing is connected to a hollow connecting rod, and the outer side of the hollow connecting rod is provided with external threads.

[0010] Specifically, both the O-ring and the outer sealing ring are made of silicone rubber.

[0011] By adopting the above technical solution, the O-ring in the O-ring groove has high elasticity and good sealing effect, which improves the sealing performance between the pressure-sensitive isolation diaphragm and the diaphragm groove. The outer sealing ring on the outer side of the top of the lower retainer has high elasticity and good sealing effect, which improves the sealing performance at the engagement point between the upper and lower retainers.

[0012] Specifically, the engaging surfaces of the upper and lower retainers are fixed by mating bolts.

[0013] Specifically, one end of the top of the upper casing has an output wire threaded through a wire hole and the output wire is connected to the output end of the circuit board.

[0014] By adopting the above technical solution, the pins on the top of the pressure sensor press against the detection contacts on the circuit board to achieve pressure detection and data processing, and transmit the data to the display end through the output wire at the top.

[0015] The beneficial effects of this utility model are:

[0016] (1) The detachable sealed pressure transmitter of this utility model uses the external thread on the outside of the hollow connecting rod to easily screw the pressure transmitter onto the internal thread connection hole of the pipeline. The pressure is sensed by the pressure-sensing isolation diaphragm, and the pressure sensor pushes the pin on the top of the pressure sensor to squeeze the detection contact on the circuit board to realize pressure detection and data processing. The data is transmitted to the display end through the output wire at the top. The O-ring in the O-ring groove has high elasticity and good sealing effect, which improves the sealing between the pressure-sensing isolation diaphragm and the diaphragm groove.

[0017] (2) The detachable sealing structure pressure transmitter of this utility model utilizes the outer sealing ring on the outer side of the top of the lower cassette, which has high elasticity and good sealing effect, to improve the sealing performance at the engagement point between the upper and lower cassettes, greatly improving the overall sealing performance of the pressure transmitter. Removing the connecting bolts facilitates the quick separation of the upper and lower cassettes, allowing the pressure sensor and pressure-sensing isolation diaphragm to be lifted, making it easy to remove the O-ring. Furthermore, the outer sealing ring can be cut and separated for quick replacement. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is an exploded view of the present invention;

[0021] Figure 3This is a schematic diagram of the internal structure of the upper casing of this utility model;

[0022] Figure 4 This utility model Figure 2 A schematic diagram of the structure at point A.

[0023] In the diagram: 1. Output wire; 2. Upper housing; 3. Connecting bolt; 4. Lower housing; 5. Hollow connecting rod; 6. External thread; 7. Pin; 8. Guide rod; 9. Pressure sensor; 10. Detection contact; 11. Guide cylinder; 12. Circuit board; 13. Pressure-sensitive isolation diaphragm; 14. O-ring; 15. O-ring groove; 16. Diaphragm groove; 17. Outer sealing ring. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] To significantly improve the overall sealing performance of the pressure transmitter, and to facilitate the removal of the O-ring 14 and the cutting and separation of the outer sealing ring 17 for replacement, as follows: Figure 1-4 As shown, the detachable sealed pressure transmitter of this utility model includes an upper retaining shell 2, a lower retaining shell 4, and a hollow connecting rod 5. The upper retaining shell 2 is engaged with the top of the lower retaining shell 4. A diaphragm groove 16 is provided at the top of the lower retaining shell 4. An O-ring groove 15 is provided on the inner side of the diaphragm groove 16, and an O-ring 14 is provided in the O-ring groove 15. An outer sealing ring 17 is bonded to the top of the lower retaining shell 4 and outside the diaphragm groove 16.

[0026] A pressure-sensitive isolation diaphragm 13 is provided in the diaphragm groove 16, and a pressure sensor 9 is provided on the top of the pressure-sensitive isolation diaphragm 13. A pin 7 is provided on the top of the pressure sensor 9. A circuit board 12 is installed in the upper housing 2 through a limiting seat, and a detection contact 10 corresponding to the pin 7 is provided on the circuit board 12.

[0027] When in use, the pressure transmitter greatly improves the overall sealing performance of the pressure transmitter, making it easy to remove the O-ring 14 and cut and separate the outer sealing ring 17 for replacement.

[0028] For example, such as Figure 2 , 3 As shown, the present invention also includes guide rods 8 on both sides of the pin 7, and guide cylinders 11 on the circuit board 12 located on both sides of the detection contact 10, with the guide rods 8 located inside the guide cylinders 11.

[0029] In use, the guide rod 8 is located inside the guide cylinder 11, enabling the pressure sensor 9 to move stably under the action of the pressure-sensitive isolation diaphragm 13.

[0030] For example, such as Figure 1 As shown, the present invention also includes a hollow connecting rod 5 connected to the bottom of the lower housing 4, and an external thread 6 is provided on the outer side of the hollow connecting rod 5.

[0031] When in use, the external thread 6 on the outside of the hollow connecting rod 5 makes it easy to screw the pressure transmitter onto the internal threaded connection hole of the pipeline.

[0032] For example, such as Figure 4 As shown, the present invention also includes that the O-ring 14 and the outer sealing ring 17 are both made of silicone rubber.

[0033] In use, the O-ring 14 in the O-ring groove 15 has high elasticity and good sealing effect, which improves the sealing between the pressure-sensitive isolation diaphragm 13 and the diaphragm groove 16. The outer sealing ring 17 on the outer side of the top of the lower retainer 4 has high elasticity and good sealing effect, which improves the sealing at the engagement point between the upper retainer 2 and the lower retainer 4.

[0034] For example, such as Figure 1 As shown, the present invention also includes that the engaging surfaces of the upper retaining shell 2 and the lower retaining shell 4 are fixed by a butt bolt 3.

[0035] When in use, removing the connecting bolt 3 facilitates quick separation of the upper retaining shell 2 and the lower retaining shell 4.

[0036] For example, such as Figure 1 , 3 As shown, the present invention also includes an output wire 1 passing through a wire hole at one end of the top of the upper casing 2, and the output wire 1 is connected to the output end of the circuit board 12.

[0037] In use, the pressure sensor 9 is pushed to press the detection contact 10 on the circuit board 12 to realize pressure detection and data processing, and the data is transmitted to the display end through the output wire 1 at the top.

[0038] In use, the external thread 6 on the outside of the hollow connecting rod 5 facilitates screwing the pressure transmitter onto the internal thread connection hole of the pipeline. The pressure is sensed by the pressure-sensing isolation diaphragm 13, and the pins 7 on the top of the pressure sensor 9 are pushed to press the detection contacts 10 on the circuit board 12 to realize pressure detection and data processing. The data is then transmitted to the display end through the output wire 1 at the top.

[0039] The O-ring 14 in the O-ring groove 15 has high elasticity and good sealing effect, which improves the sealing between the pressure-sensing isolation diaphragm 13 and the diaphragm groove 16. The outer sealing ring 17 on the outer side of the top of the lower clasp 4 has high elasticity and good sealing effect, which improves the sealing at the engagement point between the upper clasp 2 and the lower clasp 4, greatly improving the overall sealing of the pressure transmitter.

[0040] Removing the connecting bolt 3 facilitates the quick separation of the upper housing 2 and the lower housing 4, allowing the pressure sensor 9 and the pressure-sensing isolation diaphragm 13 to be lifted, making it easy to remove the O-ring 14, and to cut and separate the external sealing ring 17 for quick replacement.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure transmitter with a detachable sealed structure, characterized in that, Includes an upper retaining shell (2), a lower retaining shell (4) and a hollow connecting rod (5). The top of the lower retaining shell (4) is engaged with the upper retaining shell (2). The top of the lower retaining shell (4) is provided with a diaphragm groove (16). An O-ring groove (15) is opened on the inner side of the diaphragm groove (16) and an O-ring (14) is provided in the O-ring groove (15). An outer sealing ring (17) is bonded to the top of the lower retaining shell (4) and outside the diaphragm groove (16). A pressure-sensitive isolation diaphragm (13) is provided in the diaphragm groove (16), and a pressure sensor (9) is provided on the top of the pressure-sensitive isolation diaphragm (13). A pin (7) is provided on the top of the pressure sensor (9). A circuit board (12) is installed in the upper housing (2) through a limiting seat, and a detection contact (10) corresponding to the pin (7) is provided on the circuit board (12).

2. The pressure transmitter with a detachable sealed structure according to claim 1, characterized in that, Guide rods (8) are provided on both sides of the pin (7), and guide cylinders (11) are provided on the circuit board (12) and on both sides of the detection contact (10), with the guide rods (8) located inside the guide cylinders (11).

3. The pressure transmitter with a detachable sealed structure according to claim 1, characterized in that, The bottom of the lower housing (4) is connected to a hollow connecting rod (5), and the outer side of the hollow connecting rod (5) is provided with an external thread (6).

4. A pressure transmitter with a detachable sealed structure according to claim 1, characterized in that, Both the O-ring (14) and the outer sealing ring (17) are made of silicone rubber.

5. A pressure transmitter with a detachable sealed structure according to claim 1, characterized in that, The engaging surfaces of the upper retainer (2) and the lower retainer (4) are fixed by connecting bolts (3).

6. A pressure transmitter with a detachable sealed structure according to claim 1, characterized in that, The top end of the upper casing (2) is provided with an output wire (1) through a wire hole, and the output wire (1) is connected to the output end of the circuit board (12).

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