Diaphragm pressure gauge

Abstract

The utility model discloses a diaphragm pressure gauge, specifically related to pressure gauge technical field. Including transmission mechanism, the top fixed mounting of transmission mechanism has equipment main part, transmission mechanism includes installation sleeve and pressure measuring diaphragm, the top fixed mounting of installation sleeve has pressure measuring assembly, the bottom fixed mounting of pressure measuring assembly has sealing sleeve, the inside of sealing sleeve is arranged in the inside of installation sleeve, and its inside is provided with the installation cavity that is filled with filling liquid and has seted up piston, the outer wall fixed mounting of piston has driven magnetic steel group. The utility model, the magnetic coupling non - contact transmission between driving magnetic steel group and driven magnetic steel group, the installation cavity of completely isolated with internal filling liquid is measured medium, although still uses filling liquid but will it strict sealing in fixed cavity, fundamentally put an end to the filling liquid leakage and medium pollution because of diaphragm perforation, significantly promoted the sealing reliability and security of instrument.

Description

Technical Field

[0001] This utility model relates to the field of pressure gauge technology, specifically a diaphragm pressure gauge. Background Technology

[0002] Diaphragm pressure gauges are industrial instruments specifically designed for measuring high-viscosity, easily crystallizing, or highly corrosive media. Their core design utilizes a specially made diaphragm as the elastic element, completely isolating the measured medium from the instrument's internal mechanism. When the medium pressure acts on the diaphragm, the resulting deformation transmits the pressure through the filling fluid within the chamber to sensing elements such as the Bourdon tube, ultimately displaying the reading via a pointer mechanism. This structure not only effectively prevents corrosion of the internal mechanism by the medium but also avoids blockage of the measuring chamber due to medium solidification or crystallization. Therefore, it is widely used in the chemical, pharmaceutical, and food industries for pressure monitoring of harsh media.

[0003] In existing technology, the diaphragm pressure gauge has a closed cavity between the diaphragm and the movement, filled with a fluid such as silicone oil. When the diaphragm is deformed under pressure, the incompressibility of the fluid enables the equal transmission of pressure, thereby driving the pointer to display the pressure.

[0004] While the above-mentioned setup meets the usage requirements to a certain extent, it has been found in actual use that the diaphragm and housing are often welded or integrally packaged. Once the diaphragm is damaged or fatigued, the entire instrument usually needs to be replaced, which significantly increases maintenance costs. Long-term use or temperature fluctuations may cause the seal to age, resulting in leakage of filling fluid or infiltration of media, affecting measurement accuracy and causing pollution. The filling fluid filling process has high requirements, and it is difficult to refill or repair on site. The maintenance cycle is long and requires a high level of expertise. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where diaphragms are mostly welded or integrally packaged, requiring replacement of the entire gauge upon damage, resulting in high maintenance costs. Furthermore, the internal filling fluid is prone to leakage during temperature fluctuations or seal aging, affecting measurement accuracy and potentially leading to media contamination or instrument failure. Additionally, the filling fluid system requires high maintenance standards and is difficult to refill on-site, further reducing maintainability and long-term reliability. This invention proposes a diaphragm pressure gauge that utilizes a detachable connection structure consisting of a second mounting ring, mounting screws, and a sealing gasket. This allows for rapid and individual replacement of the pressure-measuring diaphragm, significantly reducing maintenance costs and time. Simultaneously, the non-contact magnetic coupling between the driving and driven magnet groups completely isolates the measured medium from the internal filling cavity. Although the filling fluid is still used, it is strictly sealed within a fixed cavity, fundamentally eliminating filling fluid leakage and media contamination caused by diaphragm perforation, and significantly improving the instrument's sealing reliability and safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a diaphragm pressure gauge, including a transmission mechanism. A device body is fixedly mounted on the top of the transmission mechanism. The transmission mechanism includes a mounting sleeve and a pressure-measuring diaphragm. A pressure-measuring component is fixedly mounted on the top of the mounting sleeve, and a sealing sleeve is fixedly mounted on the bottom of the pressure-measuring component. The sealing sleeve is disposed inside the mounting sleeve, and its interior has an installation cavity filled with a filling fluid. A piston is movably mounted inside the installation cavity. A driven magnet assembly is fixedly mounted on the outer wall of the piston. A mounting frame is fixedly mounted on the top of the pressure-measuring diaphragm, and a first mounting ring is fixedly mounted on the top of the mounting frame. A driving magnet assembly magnetically coupled to the driven magnet assembly is fixedly mounted on the inner wall of the first mounting ring. A second mounting ring is fixedly mounted on the outer wall of the pressure-measuring diaphragm, and the second mounting ring is detachably fixedly connected to the bottom of the mounting sleeve by several mounting screws.

[0007] Furthermore, a mechanical pointer display component is provided on one side of the main body of the device, and a digital display component is provided on the top of the main body of the device.

[0008] Furthermore, a control panel is provided on one side of the main body of the device, and a wireless communication module is provided on the top of the main body of the device.

[0009] Furthermore, it also includes an installation tube, wherein the bottom of the installation sleeve and the outer wall of the installation tube are fixedly installed with fixing flanges, and the two fixing flanges are connected by quick clamps.

[0010] Furthermore, it also includes a connecting flange, on the top of which a connecting sleeve is fixedly installed, and on the bottom of the mounting pipe a screw head is fixedly installed, the screw head being threaded into the inside of the connecting sleeve.

[0011] Furthermore, a sealing gasket is provided between the second mounting ring and the bottom of the mounting sleeve.

[0012] Furthermore, the pressure measuring component is a Bourdon tube pressure gauge mechanism.

[0013] The diaphragm pressure gauge proposed in this utility model has the following advantages: Through a detachable connection structure consisting of a second mounting ring, mounting screws, and a sealing gasket, the pressure-measuring diaphragm can be quickly and individually replaced, greatly reducing maintenance costs and time. Simultaneously, by utilizing the magnetic coupling non-contact transmission between the driving magnet group and the driven magnet group, the measured medium is completely isolated from the internal liquid-filled mounting cavity. Although the filling fluid is still used, it is strictly sealed within the fixed cavity, fundamentally eliminating filling fluid leakage and medium contamination caused by diaphragm perforation, significantly improving the sealing reliability and safety of the instrument. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a partial structural schematic diagram of the transmission mechanism of this utility model; Figure 4 This is a partial structural schematic diagram of the transmission mechanism of this utility model.

[0015] In the diagram: 1. Transmission mechanism; 101. Mounting sleeve; 102. Pressure measuring assembly; 103. Sealing sleeve; 104. Mounting cavity; 105. Piston; 106. Driven magnet assembly; 107. Pressure measuring diaphragm; 108. Mounting bracket; 109. First mounting ring; 110. Drive magnet assembly; 111. Second mounting ring; 112. Mounting screw; 113. Sealing gasket; 2. Equipment body; 3. Mechanical pointer display assembly; 4. Digital display assembly; 5. Control panel; 6. Wireless communication module; 7. Mounting tube; 8. Fixing flange; 9. Screw head; 10. Connecting flange; 11. Connecting sleeve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The structural features of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] See Figures 1-4 A diaphragm pressure gauge includes a transmission mechanism 1, with a device body 2 fixedly mounted on the top of the transmission mechanism 1. The transmission mechanism 1 includes an installation sleeve 101 and a pressure-measuring diaphragm 107. A pressure-measuring assembly 102 is fixedly mounted on the top of the installation sleeve 101, and a sealing sleeve 103 is fixedly mounted on the bottom of the pressure-measuring assembly 102. The sealing sleeve 103 is disposed inside the installation sleeve 101, and has an installation cavity 104 filled with filling fluid inside. A piston 105 is movably mounted inside the installation cavity 104, and a driven magnet assembly 106 is fixedly mounted on the outer wall of the piston 105. The top of the pressure-measuring diaphragm 107... A mounting bracket 108 is fixedly installed on the part, and a first mounting ring 109 is fixedly installed on the top of the mounting bracket 108. A drive magnet assembly 110, which is magnetically coupled to the driven magnet assembly 106, is fixedly installed on the inner wall of the first mounting ring 109. A second mounting ring 111 is fixedly installed on the outer wall of the pressure measuring diaphragm 107. The second mounting ring 111 is detachably fixed to the bottom of the mounting sleeve 101 by several mounting screws 112. A sealing gasket 113 is provided between the second mounting ring 111 and the bottom of the mounting sleeve 101. The pressure measuring assembly 102 is a Bourdon tube pressure gauge mechanism, and the transmission mechanism 1 is an instrument. The core pressure sensing and transmission module, with mounting sleeve 101 as the main structure, supports and accommodates internal components. Pressure sensing component 102 ultimately senses the pressure and drives the display. Sealing sleeve 103 and mounting cavity 104 together form a closed liquid-filled cavity, utilizing the incompressibility of the liquid to transmit pressure. Piston 105 converts magnetic force into hydraulic pressure. Driven magnet assembly 106 and driving magnet assembly 110 form a magnetic coupling pair, achieving non-contact pressure transmission from the pressure-sensing diaphragm 107 to the internal filling liquid, thus completely isolating the measured medium from the precision internal mechanisms of the instrument. Mounting bracket 1... 08 and the first mounting ring 109 are used to reliably fix the drive magnet assembly 110. The second mounting ring 111, mounting screw 112 and sealing gasket 113 together constitute the detachable sealed connection structure of the pressure measuring diaphragm 107. This design allows the pressure measuring diaphragm 107 to be removed and replaced without replacing the entire instrument when the diaphragm is damaged or needs to be replaced. This greatly reduces maintenance costs and time, while ensuring the sealing reliability of the connection. The Bourdon tube pressure gauge mechanism is a mature and reliable pressure measuring element used to convert liquid pressure into the angular displacement of the pointer. A mechanical pointer display component 3 is installed on one side of the main body 2, a digital display component 4 is installed on the top of the main body 2, a control panel 5 is installed on one side of the main body 2, and a wireless communication module 6 is installed on the top of the main body 2. The main body 2 integrates the display, control and communication functions of the instrument. The mechanical pointer display component 3 provides intuitive analog quantity indication and has high reliability. The digital display component 4 provides accurate digital readings. The control panel 5 allows users to set and operate parameters on site. The wireless communication module 6 realizes remote wireless transmission of pressure data, which is convenient for integration into the industrial Internet system and realizes remote monitoring. It also includes an installation pipe 7 and a connecting flange 10. The bottom of the installation sleeve 101 and the outer wall of the installation pipe 7 are both fixedly installed with fixing flanges 8. The two fixing flanges 8 are connected by quick clamps. The top of the connecting flange 10 is fixedly installed with a connecting sleeve 11. The bottom of the installation pipe 7 is fixedly installed with a screw head 9. The screw head 9 is threaded into the inside of the connecting sleeve 11. The fixing flanges 8 cooperate with the quick clamps to realize the quick connection and separation between the installation pipe 7 and the transmission mechanism 1, which facilitates the overall installation and disassembly of the instrument. The connecting flange 10 is threadedly connected to the screw head 9 at the bottom of the installation pipe 7 through the connecting sleeve 11 at its top, realizing a stable and sealed connection between the instrument and the process pipeline interface.

[0021] The diaphragm pressure gauge of this utility model achieves rapid and individual replacement of the pressure measuring diaphragm 107 through a detachable connection structure consisting of a second mounting ring 111, mounting screws 112, and sealing gasket 113, greatly reducing maintenance costs and time. At the same time, by utilizing the magnetic coupling non-contact transmission between the driving magnet group 110 and the driven magnet group 106, the measured medium is completely isolated from the internal liquid-filled mounting cavity 104. Although the filling fluid is still used, it is strictly sealed in the fixed cavity, fundamentally eliminating the leakage of filling fluid and medium contamination caused by diaphragm perforation, and significantly improving the sealing reliability and safety of the instrument.

[0022] Specifically, based on the combination of magnetic coupling and hydraulic transmission, when the pressure of the measured medium acts on the pressure-measuring diaphragm 107, the pressure-measuring diaphragm 107 deforms, causing the drive magnet assembly 110 fixed on it to move synchronously. The drive magnet assembly 110 drives the driven magnet assembly 106 and piston 105 located in the sealed mounting cavity 104 to move through non-contact magnetic force. The movement of the piston 105 squeezes the filling fluid in the mounting cavity 104. Utilizing the incompressibility of the liquid, the pressure change is transmitted to the Bourdon tube pressure gauge mechanism of the pressure-measuring component 102 at the top of the mounting cavity 104. The pressure-measuring component 102 converts the pressure signal into the pointer deflection of the mechanical pointer display component 3 for analog display. At the same time, it can be converted into an electrical signal through the circuit to drive the digital display component 4 for digital display, and transmitted externally by the wireless communication module 6.

[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A diaphragm pressure gauge, characterized in that, include: The top of the transfer mechanism (1) is fixedly installed with the main body of the equipment (2). The transmission mechanism (1) includes an installation sleeve (101) and a pressure measuring diaphragm (107). A pressure measuring component (102) is fixedly installed on the top of the installation sleeve (101), and a sealing sleeve (103) is fixedly installed on the bottom of the pressure measuring component (102). The sealing sleeve (103) is located inside the installation sleeve (101), and an installation cavity (104) filled with filling fluid is opened inside it. A piston (105) is movably installed inside the installation cavity (104), and a driven magnet assembly (106) is fixedly installed on the outer wall of the piston (105). The pressure measuring diaphragm (107) is fixedly mounted with a mounting bracket (108), and the mounting bracket (108) is fixedly mounted with a first mounting ring (109). The inner wall of the first mounting ring (109) is fixedly mounted with a drive magnet assembly (110) that is magnetically coupled to the driven magnet assembly (106). The outer wall of the pressure measuring diaphragm (107) is fixedly fitted with a second mounting ring (111), which is detachably fixed to the bottom of the mounting sleeve (101) by a number of mounting screws (112).

2. The diaphragm pressure gauge according to claim 1, characterized in that, A mechanical pointer display component (3) is provided on one side of the main body (2) of the device, and a digital display component (4) is provided on the top of the main body (2).

3. A diaphragm pressure gauge according to claim 1, characterized in that, A control panel (5) is provided on one side of the main body (2) of the device, and a wireless communication module (6) is provided on the top of the main body (2).

4. A diaphragm pressure gauge according to claim 1, characterized in that, It also includes an installation tube (7), and a fixing flange (8) is fixedly installed on the bottom of the installation sleeve (101) and the outer wall of the installation tube (7). The two fixing flanges (8) are connected by a quick clamp.

5. A diaphragm pressure gauge according to claim 4, characterized in that, It also includes a connecting flange (10), on the top of which a connecting sleeve (11) is fixedly installed, and on the bottom of the mounting tube (7) a screw head (9) is fixedly installed, the screw head (9) being threaded into the inside of the connecting sleeve (11).

6. A diaphragm pressure gauge according to claim 1, characterized in that, A sealing gasket (113) is provided between the second mounting ring (111) and the bottom of the mounting sleeve (101).

7. A diaphragm pressure gauge according to claim 1, characterized in that, The pressure measuring component (102) is a Bourdon tube pressure gauge mechanism.

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