Flat membrane pressure transmitter

Abstract

A flat membrane pressure transmitter provided by the present invention comprises a shell, the side wall of the shell is fixedly connected with a connecting pipe, the end part of the connecting pipe is provided with a flange, the middle part of the flange is in threaded connection with a monitoring unit, the shell is internally provided with a battery compartment, the battery compartment is internally provided with a battery pack, and the battery pack is in threaded connection with the flange. A protruding block is arranged on the edge of the upper end of the battery pack, an elastic element is arranged in the battery pack to abut against the protruding block and keep the protruding block in an extending state, a clamping groove is formed in the upper portion of the battery bin and matched with the protruding block, and a cambered surface groove which smoothly transits to the inner wall of the battery bin is formed in one side of the clamping groove. According to the invention, the built-in battery pack is arranged, so that the arrangement of cables is avoided, and the monitoring unit can be replaced conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure transmitters, in particular to a flat film pressure transmitter. Background Art

[0002] A pressure transmitter converts pressure into a pneumatic or electrical signal for control and remote transmission. Flush diaphragm pressure transmitters are analog pressure transmitters with a flat diaphragm structure, increasing the contact area with the media. They offer a wide temperature range, strong overload capacity, and corrosion resistance, making them suitable for a wide range of applications. To ensure this series of pressure transmitters can withstand harsh environments, in addition to careful sensor selection, some active components are military-grade.

[0003] Existing pressure transmitters typically rely on cables for power and communication, which undoubtedly increases costs. Furthermore, existing sensors are fixed and non-detachable to the pressure transmitter. If the sensor experiences a decrease in accuracy or damage over time, the entire pressure transmitter will typically need to be replaced. Summary of the Invention

[0004] To address the aforementioned issues, the present invention discloses a flat-diaphragm pressure transmitter comprising a housing, a connecting pipe fixedly connected to the sidewall of the housing, a flange disposed at the end of the connecting pipe, and a monitoring unit threadedly connected to the center of the flange. This allows the pressure transmitter to have a replaceable monitoring unit. If accuracy degrades or even damages during long-term use, the monitoring unit can be replaced, significantly reducing maintenance costs.

[0005] A battery compartment is provided inside the shell, a battery pack is provided inside the battery compartment, a protrusion is provided on the upper edge of the battery pack, and an elastic element is provided inside the battery pack to resist and maintain the protrusion in an extended state. A card slot is provided on the upper part of the battery compartment, and the card slot and the protrusion cooperate, and one side of the card slot is provided with an arc groove that smoothly transitions to the inner wall of the battery compartment. Traditionally, upper communication and power supply are carried out by arranging cables, which increases costs. Since the pressure transmitter consumes relatively little energy, and the energy consumption is mainly the acquisition frequency, a battery pack is provided here, and the power supply by the battery pack eliminates the need for complicated wiring. A protrusion and a card slot are also provided here to ensure that the battery pack fits stably in the battery compartment. When the battery compartment is removed, it is rotated toward the arc groove to disengage the protrusion from the card slot.

[0006] Preferably, the monitoring unit comprises a tube with a diaphragm disposed at one end, and a strain gauge fixedly connected to the middle of the diaphragm. The monitored material acts on the diaphragm, which in turn acts on the strain gauge, causing changes in the strain gauge's electrical properties, such as resistance. The pressure of the container in which the material is located is determined by collecting and converting these electrical parameters.

[0007] Preferably, two spring pins are fixedly connected to the other end of the tube body, and two electrode rings are provided inside the connecting tube, and the ends of the spring pins are electrically connected to the electrode rings. The electrical connection of the strain unit is ensured through the spring pins and the electrode rings.

[0008] Preferably, a hexagonal bayonet is provided in the middle of the tube body, and a sealing ring is sleeved on one side of the bayonet. The bayonet facilitates screwing the tube body into the flange, and the sealing ring is used for sealing.

[0009] Preferably, the lower sidewall of the battery compartment is provided with an inclined groove, and the lower sidewall of the battery pack is provided with a movable clamping plate, to which a shifting block is fixedly connected, and the shifting block extends from the lower end of the battery pack. The lower end of the housing is threadedly connected to a lower cover. The movable clamping plate is provided as a safety structure to prevent the battery pack from falling off.

[0010] Preferably, a charge and discharge interface is provided at the upper end of the battery pack, and a plurality of storage batteries and a charge and discharge management module are provided inside the battery pack.

[0011] Preferably, a display screen is provided at the upper end of the housing, an electrical chamber is provided inside the housing, and the electrical chamber is located above the battery compartment. A circuit board is provided in the battery compartment, and a digital-to-analog conversion module, a communication module, and a logic control unit are provided on the circuit board.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. A battery pack is provided inside the housing, eliminating the need for cables. Meanwhile, the protrusions, sliding blocks, inclined slots, card slots, and arcuate slots provided on the battery pack and battery compartment facilitate installation and replacement of the battery pack.

[0014] 2. A monitoring unit is provided, and the monitoring unit is connected by thread, that is, the monitoring unit can be disassembled and assembled, and is easy to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 It is a front schematic diagram of the present invention;

[0017] Figure 3 is a three-dimensional schematic diagram of a battery pack of the present invention;

[0018] Figure 4 is a schematic diagram of the lower end of the battery pack of the present invention;

[0019] Figure 5 is a schematic cross-sectional view of the housing of the present invention;

[0020] Figure 6It is a perspective view of the monitoring unit of the present invention.

[0021] List of reference numerals:

[0022] 1. Monitoring unit; 2. Flange; 3. Connecting pipe; 4. Lower cover; 5. Housing; 6. Display screen; 7. Electrode ring; 8. Battery pack; 9. Charge and discharge interface; 10. Movable card plate; 11. Bump; 12. Shift block; 13. Inclined groove; 14. Battery compartment; 15. Electrical compartment; 16. Arc groove; 17. Card slot

[0023] 101. Diaphragm; 102. Strain gauge; 103. Tube; 104. Bayonet; 105. Sealing ring; 106. Spring pin. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0025] like Figures 1 to 6 As shown, a flat membrane pressure transmitter includes a shell 5. The shell 5 is a cylindrical structure. The side wall of the shell 5 is fixedly connected to a connecting pipe 3. The end of the connecting pipe 3 is provided with a flange 2. The pressure transmitter is fixed to the monitored container through the flange 2. The middle part of the flange 2 is threadedly connected to a monitoring unit 1. The monitoring unit 1 is used to obtain the pressure in the container. At the same time, the monitoring unit 1 is detachable, which is conducive to later maintenance and replacement, rather than replacing the entire pressure transmitter, thereby reducing costs.

[0026] The shell 5 is provided with a battery compartment 14 for storing batteries. The battery compartment 14 is provided with a battery pack 8 for providing power to the pressure transmitter. The upper edge of the battery pack 8 is provided with a protrusion 11, and the interior of the battery pack 8 is provided with an elastic element to resist and keep the protrusion 11 extended, that is, the protrusion 11 can be pressed into the interior of the shell 5 under the action of external force. The upper part of the battery compartment 14 is provided with a card slot 17, and the card slot 17 cooperates with the protrusion 11 to fix the battery pack 8 in the battery compartment 14. One side of the card slot 17 is provided with an arc groove 16 that smoothly transitions to the inner wall of the battery compartment 14. When replacing the battery pack 8, the battery pack 8 is rotated and the protrusion 11 slides into the arc groove 16. After the protrusion 11 contacts the battery compartment 14, the protrusion 11 is pressed into the interior of the battery pack 8. At this time, the battery pack 8 can be pulled out of the battery compartment 14.

[0027] Most existing pressure transmitters use cables for power supply and communication with higher-level controllers, but cabling significantly increases costs. Pressure transmitters consume relatively little energy, so the inclusion of battery pack 14 eliminates the need for cabling. Furthermore, in this solution, most of the space within housing 5 is allocated to battery pack 14, allowing the pressure transmitter to store more energy, ensuring long-term operation. Furthermore, when power is running low, maintenance personnel can simply replace battery pack 14.

[0028] The monitoring unit 1 includes a tube body 103, a diaphragm 101 is provided at one end of the tube body 103, and a strain unit 102 is fixedly connected to the middle of the diaphragm 101. After the pressure transmitter is installed, the material in its container acts on the diaphragm 101 and is transmitted to the strain unit 102, and an electrical signal is obtained through conversion by the strain unit 102.

[0029] The other end of the tube body 103 is fixedly connected to two spring needles 106. Two electrode rings 7 are provided inside the connecting tube 3. The ends of the spring needles 106 are electrically connected to the electrode rings 7. Through the spring needles 106 and the electrode rings 7, the signal connection between the strain unit 102 and the electronic components in the shell 5 is realized. At the same time, this connection method is conducive to the replacement of the monitoring unit 1.

[0030] A hexagonal bayonet 104 is provided in the middle of the tube body 103 to facilitate the use of tools to disassemble and assemble the monitoring unit 1 in the middle of the flange 2. A sealing ring 105 is sleeved on one side of the bayonet 104 to improve the sealing of the connection.

[0031] A bevel groove 13 is provided on the lower part of the side wall of the battery compartment 14. The bevel groove 13 is provided so that when the battery pack 8 is installed, the protrusion 11 is aligned with the bevel groove 13 and pushed into the battery pack 8. A movable card plate 10 is provided on the lower side wall of the battery pack 8. A shift block 12 is fixedly connected to the movable card plate 10, and the shift block 12 extends from the lower end of the battery pack 8. The movable card plate 10 can be extended or retracted into the battery pack 8 through the shift block 12. When the battery pack 8 is installed, the movable card plate 19 extends into the bevel groove 13 to prevent the battery pack 8 from rotating and falling off from the battery compartment 14. The lower end of the shell 5 is threadedly connected to the lower cover 4, which can be removed by rotating the lower cover 4.

[0032] A charge and discharge interface 9 is provided at the upper end of the battery pack 8, and the charge and discharge interface 9 is used for charging and discharging the internal battery. At the same time, the charge and discharge interface 9 is a circular port. Several batteries and a charge and discharge management module are provided inside the battery pack 8.

[0033] A display screen 6 is provided at the upper end of the shell 5 for displaying the monitored pressure indication. An electrical chamber 15 is provided inside the shell 5, and the electrical chamber 15 is located above the battery compartment 14. A circuit board is provided in the electrical chamber 15, and the circuit board is provided with a digital-to-analog conversion module, a wireless communication module and a logic control unit.

[0034] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A flat membrane pressure transmitter, characterized in that: It comprises a shell (5), a connecting pipe (3) is fixedly connected to the side wall of the shell (5), a flange (2) is provided at the end of the connecting pipe (3), and a monitoring unit (1) is threadedly connected to the middle of the flange (2); A battery compartment (14) is provided inside the housing (5), a battery pack (8) is provided inside the battery compartment (14), a protrusion (11) is provided on the upper edge of the battery pack (8), and an elastic element is provided inside the battery pack (8) to resist and maintain the protrusion (11) in an extended state, a card slot (17) is provided on the upper part of the battery compartment (14), and the card slot (17) and the protrusion (11) cooperate, and a curved groove (16) is provided on one side of the card slot (17) that smoothly transitions to the inner wall of the battery compartment (14).

2. A flat membrane pressure transmitter according to claim 1, characterized in that: The monitoring unit (1) comprises a tube body (103), one end of the tube body (103) is provided with a diaphragm (101), and the middle portion of the diaphragm (101) is fixedly connected to a strain unit (102).

3. A flat membrane pressure transmitter according to claim 2, characterized in that: The other end of the tube body (103) is fixedly connected to two spring pins (106), and two electrode rings (7) are provided inside the connecting tube (3). The ends of the spring pins (106) are electrically connected to the electrode rings (7).

4. A flat film pressure transmitter according to claim 2, characterized in that: A bayonet (104) with a regular hexagonal cross section is provided in the middle of the tube body (103), and a sealing ring (105) is sleeved on one side of the bayonet (104).

5. The flat film pressure transmitter according to claim 1, characterized in that: The lower part of the side wall of the battery compartment (14) is provided with an inclined groove (13), the lower side wall of the battery pack (8) is provided with a movable clamping plate (10), a shifting block (12) is fixedly connected to the movable clamping plate (10), and the shifting block (12) extends from the lower end of the battery pack (8), and the lower end of the housing (5) is threadedly connected to the lower cover (4).

6. The flat membrane pressure transmitter according to claim 1, characterized in that: A charge and discharge interface (9) is provided at the upper end of the battery pack (8), and a plurality of storage batteries and a charge and discharge management module are provided inside the battery pack (8).

7. The flat membrane pressure transmitter according to claim 1, characterized in that: A display screen (6) is provided at the upper end of the housing (5), an electrical chamber (15) is provided inside the housing (5), and the electrical chamber (15) is located above the battery compartment (14).

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