Pressure transmitter

Abstract

The utility model discloses a pressure transmitter which comprises a display instrument, a process connecting piece and a pressure monitoring module are arranged below the display instrument, two ends of the pressure monitoring module are respectively connected with the display instrument and the process connecting piece, and the pressure monitoring module comprises a shell, a sensor, a supporting plate and a limiting piece. The sensor, the supporting plate and the limiting piece are all arranged on the inner side of the shell, the supporting plate is arranged below the sensor, and the limiting piece is arranged above the sensor and detachably connected with the shell; according to the utility model, the detachable shell is arranged, and the detachable sensor is arranged in the shell, so that support is provided for dismounting the sensor for maintenance or replacement when the pressure transmitter is damaged, and the current situation that the pressure measuring element sensor and the display instrument are integrally connected and are inconvenient to dismount for maintenance or replacement is changed; and the damage cost of the pressure transmitter can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pressure transmitter, specifically is a pressure transmitter. BACKGROUND

[0002] In the industrial production field, in order to be able to real-time monitoring gas, liquid and so on Physical parameter, need to install in monitoring equipment on gas, liquid and so on Material storage, conveying and other devices, such as in order to be able to know the pressure parameter of gas, liquid, need to install in pressure transmitter on storage, conveying and other devices.

[0003] At present, pressure transmitter generally includes pressure measuring element sensor, measuring circuit and process connecting piece three parts, when using pressure transmitter, through process connecting piece, pressure transmitter is connected with storage, conveying and other devices, therefore, gas, liquid can be contacted with pressure measuring element sensor, and the physical pressure parameter of gas, liquid and other substances is changed into standard electric signal (such as 4-20 mADC, etc.) by pressure measuring element sensor, to provide secondary instrument such as indicating alarm instrument, recorder, regulator for measurement, indication and process regulation. In addition, the structure of pressure transmitter has been disclosed, and the specific structure of pressure transmitter can be known by searching, such as a Chinese patent with publication number CN105579820A discloses the structure of pressure transmitter, which discloses a pressure transmitter including a resistive pressure sensor element, the resistive pressure sensor element has a measuring diaphragm, the measuring diaphragm has at least four resistor elements, wherein the resistor elements are arranged in a full-bridge circuit, etc. Also, such as a Chinese patent with publication number CN103389180A discloses a pressure transmitter, the upper part of the seat body has a cavity, the bottom end of the seat body is provided with a blind hole, the bottom surface of the blind hole and the bottom surface of the cavity form a strain wall, the amplifier circuit board and the strain gauge connected thereto are arranged in the cavity of the seat body, the strain gauge is attached to the strain wall, the output end of the amplifier circuit board is connected to the cable outside the seat body, etc. In addition, a Chinese patent with publication number CN110146216B discloses a pressure transmitter, which discloses that the explosion-proof shell is internally provided with a terminal, the terminal is connected with a data acquisition system, and the data acquisition system is connected with a display screen, etc.

[0004] Whether the pressure transmitter provided by the above-mentioned patent or other types of pressure transmitter, in its production, the pressure measuring element sensor will be arranged in the pressure transmitter shell made in one piece, this kind of operation can realize the sealed arrangement of the pressure transmitter, and at the same time guarantee the use of the pressure measuring element sensor, but it is not conducive to the maintenance of the pressure measuring element sensor in the later period, because if you want to repair the pressure transmitter, you need to damage its shell, if the shell of the pressure transmitter is damaged, it will not be restored to its original state, therefore, in practice, when the pressure transmitter is damaged, it is generally replaced directly, but the cost is increased accordingly. Utility Model Content

[0005] The purpose of the utility model is to provide a pressure transmitter, aiming to improve the problem that the pressure transmitter is inconvenient to maintain later.

[0006] The utility model is implemented as follows: a pressure transmitter, a display instrument, a process connection piece and a pressure monitoring module are arranged below the display instrument, the two ends of the pressure monitoring module are respectively connected to the display instrument and the process connection piece, the pressure monitoring module includes a shell, a sensor, a supporting plate and a limiting piece, the sensor, the supporting plate and the limiting piece are all arranged on the inner side of the shell, the supporting plate is arranged below the sensor, and the limiting piece is arranged above the sensor and is detachably connected to the shell.

[0007] Preferably, the shell is configured as a top-to-bottom through structure, the lower side of the supporting plate is flush with the lower side of the shell, and the upper side of the limiting member is not higher than the upper side of the shell.

[0008] Preferably, the supporting plate includes an outer ring plate and an inner ring plate, the inner side surface of the outer ring plate is set as a first inclined surface, and the outer side surface of the inner ring plate is set as a second inclined surface 4, and the diameters of the upper ends of the first inclined surface and the second inclined surface 4 are larger than the diameters of the lower ends.

[0009] Preferably, a plurality of convex plates 4 are provided at the bottom of the inner side of the shell, and a plurality of grooves are provided at the edge of the lower side of the outer ring plate, and the convex plates 4 extend into the grooves.

[0010] Preferably, the limiting member is configured as an annular structure, and a transverse plate is provided inside, a polygonal hole is provided on the transverse plate, and mutually adaptable threaded structures are respectively provided on the upper end of the inner side of the shell and the contact surface of the limiting member.

[0011] Preferably, a sealing gasket is provided on the outer side of the sensor. The sealing gasket is wound into a cylindrical structure, and the upper and lower ends thereof protrude from the upper and lower ends of the sensor respectively.

[0012] Preferably, the process connector includes a tube body and two sealing plates. The tube body is located between the two sealing plates. An annular plate is provided on the side walls of the two sealing plates close to each other. The annular plate is sealingly inserted into the tube body.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model is provided with a detachable shell, and a detachable sensor is provided in the shell, which provides support for removing the sensor for repair or replacement when the pressure transmitter is damaged. It changes the current situation that the pressure measuring element sensor and the display instrument are connected as one body and are inconvenient to be removed for repair or replacement, and can reduce the cost of damage to the pressure transmitter.

[0015] 2. The utility model is provided with a supporting plate that can adjust its own state. The inner ring plate can be added or removed according to needs to provide support for sensors of different sizes, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a structural diagram of the process connection piece of the utility model;

[0018] Figure 3 This is a structural diagram of the pressure monitoring module of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the first supporting plate of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the second supporting plate of the utility model;

[0021] Figure 6 It is a structural diagram of the sensor of the utility model;

[0022] Figure 7 It is a structural diagram of the limiting member of the utility model;

[0023] Figure 8 It is a structural diagram of the shell of the utility model;

[0024] Figure 9 This is a schematic structural diagram of the outer ring plate of the utility model;

[0025] Figure 10 This is a schematic diagram of an existing pressure transmitter.

[0026] In the figure: 1. Display instrument; 2. Process connection; 21. Tube body; 22. Sealing plate; 23. Ring plate; 3. Pressure monitoring module; 4. Housing; 41. Protruding plate; 5. Sensor; 51. Sealing gasket; 6. Limiting member; 61. Horizontal plate; 62. Polygonal hole; 7. Supporting plate; 71. Outer ring plate; 72. Inner ring plate; 73. First inclined surface; 74. Second inclined surface; 75. Groove. DETAILED DESCRIPTION

[0027] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0029] Example 1

[0030] During manufacturing, existing pressure transmitters incorporate a load cell sensor within an integrated housing. When the pressure transmitter becomes damaged, repair is inconvenient and requires direct replacement by the manufacturer, increasing production costs. To address this issue, this embodiment improves upon the existing pressure transmitter, allowing for disassembly of the pressure transmitter as needed to repair or replace the load cell sensor. The detailed structure is described below.

[0031] like Figure 1 、 Figure 10 As shown, the existing pressure transmitter is an existing technology, and its structure is briefly described here. The existing pressure transmitter includes a display instrument, a process connection part, a pressure element sensor, etc. The pressure element sensor and the display instrument are integrated, and the process connection part is set below the pressure element sensor and can be connected to the storage or transportation device of gas or liquid. The display instrument and the pressure element sensor (such as a pressure sensor) are both existing products, so they are not described in detail here. The existing pressure transmitter can be referred to Figure 10 .

[0032] like Figure 1 、 Figure 3As shown, to enable detachable maintenance or replacement of the pressure sensor, a pressure monitoring module 3 is disposed between the display instrument 1 and the process connection 2. The pressure monitoring module 3 includes a housing 4, a sensor 5, a support plate 7, and a restraining member 6. The sensor 5 can be configured as a pressure sensor. The housing 4 is configured as a vertical through-structure. The sensor 5, support plate 7, and restraining member 6 are all disposed on the inner side of the housing 4, with the support plate 7 disposed below the sensor 5 and the restraining member 6 disposed above the sensor 5. The restraining member 6 is detachably connected to the housing 4. The upper and lower ends of the housing 4 are respectively connected to the display instrument 1 and the process connection 2 by bolts. Therefore, if the pressure sensor of the pressure transmitter is damaged, the operator can remove the bolts connecting the housing 4 to the display instrument 1 and the process connection 2, release the restraint of the housing 4, and detach it from the process connection 2. After the housing 4 is detached from the process connection 2, the restraining member 6 can be removed to release the restraint of the sensor 5, allowing the sensor 5 to be detached from the housing 4 for maintenance or replacement. This arrangement changes the current situation where the pressure measuring element sensor and the display instrument are integrally connected and are inconvenient to disassemble for repair or replacement, and can reduce the cost of damage to the pressure transmitter.

[0033] like Figure 3 As shown, in order to enable the pressure monitoring module 3 to be stably installed on the pressure transmitter, the lower side of the supporting plate 7 is flush with the lower side of the shell 4, and the upper side of the limiting member 6 is not higher than the upper side of the shell 4, so as to avoid the installation of the pressure monitoring module 3 being affected by the presence of the supporting plate 7 and the limiting member 6.

[0034] like Figure 1 、 Figure 7 As shown, in order to achieve the detachability of the limiting member 6, the limiting member 6 is set to a ring structure, and a horizontal plate 61 is set on the inner side, and a polygonal hole 62 is set on the horizontal plate 61. The upper end of the inner side of the shell 4 and the surface where the limiting member 6 contacts each other are respectively provided with mutually adapted threaded structures. Therefore, the limiting member 6 is threadedly installed on the shell 4. Since the polygonal hole 62 is provided, the limiting member 6 can be controlled to rotate under the action of a polygonal wrench, which provides convenience for the disassembly and assembly of the limiting member 6.

[0035] like Figure 4 、 Figure 5 As shown, in order to enable the device to adapt to sensors 5 of different sizes, the supporting plate 7 includes an outer ring plate 71 and an inner ring plate 72. The inner side surface of the outer ring plate 71 is set to a first inclined surface 73, and the outer side surface of the inner ring plate 72 is set to a second inclined surface 74. The diameter of the upper end of the first inclined surface 73 and the second inclined surface 74 is larger than the diameter of the lower end. Because the outer ring plate 71 is stably connected to the outer shell 4, and with the cooperation of the first inclined surface 73 and the second inclined surface 74, the inner ring plate 72 can be stably installed, which provides convenience for adding or removing the inner ring plate 72 according to needs, provides support for the sensor 5 with a smaller diameter, and provides convenience for replacing the small-sized sensor 5.

[0036] like Figure 6 As shown, in order to make the sensor 5 stable and sealed in the housing 4, a sealing gasket 51 is provided on the outer side of the sensor 5. The sealing gasket 51 is wound into a cylindrical structure, and the upper and lower ends protrude from the upper and lower ends of the sensor 5 respectively. When the limiting member 6 descends, the limiting member 6 and the supporting plate 7 work together to squeeze the upper and lower ends of the sealing gasket 51 respectively, so that the upper and lower ends of the sealing gasket 51 are deformed, thereby blocking the upper and lower ends of the contact surface between the sensor 5 and the housing 4, thereby realizing a sealed connection between the sensor 5 and the housing 4, and preventing gas or liquid from entering the display instrument 1 through the housing 4.

[0037] like Figure 2 As shown, in this embodiment, the process connection 2 is partially improved. Specifically, the process connection 2 includes a tube body 21 and two sealing plates 22. The tube body 21 is located between the two sealing plates 22. An annular plate 23 is provided on the adjacent side walls of the two sealing plates 22. The annular plates 23 are sealed and inserted into the tube body 21. Under the action of the annular plates 23, the tube body 21 can be stably installed relative to the sealing plates 22, preventing them from deviating from each other due to external forces. The process connection 2 only has the above-mentioned improvements; the rest of its structure is the same as the existing process connection 2.

[0038] Example 2

[0039] like Figure 8 、 Figure 9 As shown, on the basis of Example 1, in order to be able to replace the supporting plate 7, the supporting plate 7 can be detachably installed relative to the outer shell 4. Specifically, a plurality of protrusions 41 are provided at the bottom of the inner side of the outer shell 4, and a plurality of grooves 75 are provided on the edge of the lower side of the outer ring plate 71. The protrusions 41 extend into the grooves 75. Under the action of the protrusions 41 and the grooves 75, the supporting plate 7 can be stably installed relative to the outer shell 4. In addition, it is convenient to disassemble the supporting plate 7 according to needs.

[0040] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A pressure transmitter, comprising a display instrument (1), a process connection member (2) being provided below the display instrument (1), characterized in that: A pressure monitoring module (3) is provided between the display instrument (1) and the process connection piece (2), and the two ends of the pressure monitoring module (3) are respectively connected to the display instrument (1) and the process connection piece (2). The pressure monitoring module (3) comprises a housing (4), a sensor (5), a supporting plate (7) and a limiting piece (6). The sensor (5), the supporting plate (7) and the limiting piece (6) are all provided on the inner side of the housing (4), the supporting plate (7) is provided below the sensor (5), and the limiting piece (6) is provided above the sensor (5) and is detachably connected to the housing (4).

2. A pressure transmitter according to claim 1, characterized in that: The housing (4) is configured as a top-to-bottom through structure, the lower side of the supporting plate (7) is flush with the lower side of the housing (4), and the upper side of the limiting member (6) is not higher than the upper side of the housing (4).

3. A pressure transmitter according to claim 2, characterized in that: The supporting plate (7) comprises an outer ring plate (71) and an inner ring plate (72), the inner side surface of the outer ring plate (71) is set as a first inclined surface (73), and the outer side surface of the inner ring plate (72) is set as a second inclined surface (74), and the diameters of the upper ends of the first inclined surface (73) and the second inclined surface (74) are larger than the diameters of the lower ends.

4. A pressure transmitter according to claim 3, characterized in that: A plurality of convex plates (41) are provided at the bottom of the inner side of the housing (4), a plurality of grooves (75) are provided at the edge of the lower side of the outer ring plate (71), and the convex plates (41) extend into the grooves (75).

5. The pressure transmitter according to claim 2, characterized in that: The limiting member (6) is configured as an annular structure, and a transverse plate (61) is provided on the inner side thereof, a polygonal hole (62) is provided on the transverse plate (61), and mutually adapted threaded structures are provided on the contact surfaces of the upper end of the inner side of the housing (4) and the limiting member (6).

6. A pressure transmitter according to claim 5, characterized in that: A sealing gasket (51) is provided on the outer side surface of the sensor (5); the sealing gasket (51) is wound into a cylindrical structure, and the upper and lower ends thereof protrude from the upper and lower ends of the sensor (5) respectively.

7. The pressure transmitter according to claim 1, characterized in that: The process connection part (2) comprises a tube body (21) and two sealing plates (22), wherein the tube body (21) is located between the two sealing plates (22), and an annular plate (23) is provided on the side walls of the two sealing plates (22) adjacent to each other, and the annular plate (23) is sealed and inserted into the tube body (21).

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