A micro differential pressure transmitter for air tightness detection

Abstract

The utility model discloses a micro differential pressure transmitter for air -tight detection, including installation box, the upper portion fixed connection of installation box has the support station, the upper portion of support station is equipped with the damping apron, the lower portion welding of damping apron has the support leg, is equipped with the through -hole for support leg to pass through on the damping apron, the front side of support station is connected with locking bolt, the upper portion of damping apron is equipped with differential pressure transmitter body, install first pressure vessel casing and second pressure vessel casing on differential pressure transmitter body. Through set up with the damping apron and the support station multilayer structure, and combine hydraulic damper and spring, the stability and the anti -vibration ability of differential pressure transmitter in the working process have been enhanced significantly, prevent the measurement error or equipment damage caused by external vibration.

Description

Technical Field

[0001] This utility model relates to differential pressure transmitters, and more specifically, to a miniature differential pressure transmitter for airtightness detection. Background Technology

[0002] A differential pressure transmitter is a self-balancing measuring instrument. It can measure the pressure difference between two ends. Fluid or gas enters the two connection ports of the differential pressure transmitter and a differential pressure is formed at the connection ports. The differential pressure transmitter can convert the pressure difference into an electrical signal to achieve accurate measurement and monitoring of the pressure.

[0003] Existing differential pressure transmitters, such as the one disclosed in Chinese Utility Model Publication No. CN222652437U, include a differential pressure transmitter body. The differential pressure transmitter body is provided with a low-pressure side interface and a high-pressure side interface, and also includes a high-pressure side buffer plate corresponding to the high-pressure side interface. The high-pressure side buffer plate is provided with a high-pressure interface that is arranged opposite to the high-pressure side interface. A telescopic tube that is arranged opposite to the high-pressure side interface and the high-pressure interface is provided between the differential pressure transmitter body and the high-pressure side buffer plate. One end of the telescopic tube is connected to the high-pressure interface, and the other end is connected to the high-pressure side interface. The differential pressure transmitter body is provided with a miniature damper on the high-pressure side interface that is connected to the high-pressure side buffer plate.

[0004] While the aforementioned patents can provide a buffering effect, they are not very stable, lack height adjustment, and are inconvenient for airtightness testing. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for a miniature differential pressure transmitter used for airtightness detection.

[0006] According to a first aspect of the present invention, a miniature differential pressure transmitter for airtightness detection is provided, comprising a mounting box, a support platform fixedly connected to the upper part of the mounting box, a shock-absorbing plate provided on the upper part of the support platform, a support leg welded to the lower part of the shock-absorbing plate, a through hole for the support leg to pass through on the shock-absorbing plate, a locking bolt connected to the front side of the support platform, a differential pressure transmitter body provided on the upper part of the shock-absorbing plate, a first pressure vessel shell and a second pressure vessel shell mounted on the differential pressure transmitter body, a connector plate mounted on the first pressure vessel shell and the second pressure vessel shell, a first side plate connected to the connector plate, a first clamping plate connected to the first side plate, and the first clamping plate connected to the shock-absorbing plate.

[0007] Optionally, a hydraulic damper is provided between the damping platform and the support platform, a spring is sleeved on the outside of the hydraulic damper, and a rubber layer is bonded to the damping platform.

[0008] Optionally, the first pressure vessel shell and the second pressure vessel shell are respectively welded with sleeves, and the first pressure vessel shell and the second pressure vessel shell are connected by a first bolt.

[0009] Optionally, a display screen is provided on the front side of the differential pressure transmitter body, and an air inlet is connected to the right side of the first pressure vessel housing and the second pressure vessel housing.

[0010] Optionally, a first bend is connected to the air inlet, an air pump is provided inside the mounting box, and an air distribution pipe is connected to the air outlet of the air pump.

[0011] Optionally, the upper end of the gas distribution pipe is connected to the first bend pipe, and the right end of the gas distribution pipe is connected to a detection pipe.

[0012] Optionally, a hose interface is connected to the right side of the detection tube, the hose interface is embedded in the side wall of the mounting box, and a pressure relief valve is provided on one side of the first pressure vessel shell and the second pressure vessel shell.

[0013] Optionally, the mounting box is equipped with a switch inside, the base of the air pump is provided with a rubber buffer layer at the bottom, and the mounting box is provided with a rectangular through hole.

[0014] According to one embodiment of this disclosure, the following beneficial effects are achieved:

[0015] 1. By setting up a multi-layer structure with a shock-absorbing platform and a support platform, and combining hydraulic dampers and springs, the stability and vibration resistance of the differential pressure transmitter during operation are significantly enhanced, preventing measurement errors or equipment damage caused by external vibrations.

[0016] 2. The vibration damping platform can be fixed or loosened by tightening bolts and support legs, allowing for flexible adjustment of the differential pressure transmitter's installation height to adapt to different installation environments and usage requirements, thus improving the equipment's versatility and ease of installation. The use of a first clamping plate and side plate for fixing ensures a tight connection between components, further enhancing the overall structural stability.

[0017] 3. This device innovatively integrates components such as an air pump, air distribution pipe, detection pipe and air inlet, which can directly test the air tightness of the object being tested without the need for complex external equipment, thus improving work efficiency and reducing testing costs.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of a miniature differential pressure transmitter for airtightness detection in one embodiment.

[0021] Figure 2 This is a schematic diagram of the rectangular through-hole structure of a mounting box for a miniature differential pressure transmitter used for airtightness detection in one embodiment.

[0022] Figure 3 This is a schematic diagram of the gas distribution pipe structure of a miniature differential pressure transmitter used for air tightness detection in one embodiment;

[0023] Figure 4 This is a schematic diagram of the differential pressure transmitter body structure of a miniature differential pressure transmitter used for airtightness detection in one embodiment.

[0024] Figure 5 This is an exploded view of the right side of the differential pressure transmitter body of a miniature differential pressure transmitter used for airtightness detection in one embodiment.

[0025] Figure 6 This is a schematic diagram of the pressure relief valve on the left side of the differential pressure transmitter body of a miniature differential pressure transmitter used for airtightness detection in one embodiment.

[0026] The diagram shows the following: 1. Differential pressure transmitter body; 2. First bend; 3. Mounting box; 4. Base; 5. Switch; 6. Air pump; 7. Hose interface; 8. Rectangular through hole; 9. Air distribution pipe; 10. Detection pipe; 11. Display screen; 12. First pressure vessel housing; 13. Second pressure vessel housing; 14. First bolt; 15. Sleeve; 16. Connector plate; 17. First side plate; 18. Air inlet; 19. First clamping plate; 20. Support leg; 21. Support platform; 22. Locking bolt; 23. Hydraulic damper; 24. Spring; 25. Pressure relief valve; 26. Vibration damping platform. Detailed Implementation

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] like Figures 1-6 As shown, a miniature differential pressure transmitter for airtightness detection includes a mounting box 3. A support platform 21 is fixedly connected to the upper part of the mounting box 3. A shock-absorbing plate 26 is provided on the upper part of the support platform 21. A hydraulic damper 23 is provided between the shock-absorbing plate 26 and the support platform 21. A spring 24 is sleeved on the outside of the hydraulic damper 23. A rubber layer is adhered to the shock-absorbing plate 26. Through the combined action of the spring 24, the hydraulic damper 23 and the rubber layer, the shock-absorbing plate 26 can play a shock-absorbing role, which can reduce the vibration of the differential pressure transmitter body 1 mounted on it.

[0032] The lower part of the shock-absorbing platform 26 is welded with support legs 20. The shock-absorbing platform 26 is provided with through holes for the support legs 20 to pass through. The support legs 20 are inserted into the through holes and the height can be adjusted. The front side of the support platform 21 is connected with locking bolts 22. After the height is adjusted, the height can be fixed by locking bolts 22.

[0033] The upper part of the shock-absorbing platform 26 is provided with a differential pressure transmitter body 1. A first pressure vessel housing 12 and a second pressure vessel housing 13 are installed on the differential pressure transmitter body 1. A diaphragm chamber and a sensitive element are provided between the first pressure vessel housing 12 and the second pressure vessel housing 13, which can measure differential pressure.

[0034] Connector plates 16 are installed on the first pressure vessel shell 12 and the second pressure vessel shell 13. The two connector plates 16 are connected to the first side plate 17 by bolts. The first side plate 17 is connected to the first clamping plate 19. The upper part of the first clamping plate 19 is provided with a bending structure to limit the movement. The first clamping plate 19 is connected to the vibration damping plate 26, thereby indirectly connecting the vibration damping plate 26 to the differential pressure transmitter body 1.

[0035] The first pressure vessel shell 12 and the second pressure vessel shell 13 are respectively welded with sleeves 15, and the first pressure vessel shell 12 and the second pressure vessel shell 13 are connected by the first bolt 14.

[0036] The front side of the differential pressure transmitter body 1 is provided with a display screen 11 for displaying differential pressure values. The right side of the first pressure vessel housing 12 and the second pressure vessel housing 13 is connected to an air inlet 18 for connecting to an air pump 6.

[0037] The air inlet 18 is connected to the first bend pipe 2, and the inside of the mounting box 3 is equipped with an air pump 6. The air outlet of the air pump 6 is connected to the air distribution pipe 9.

[0038] The upper end of the gas distribution pipe 9 is connected to the first bend pipe 2, and the right end of the gas distribution pipe 9 is connected to the detection pipe 10.

[0039] The right side of the detection tube 10 is connected to a hose interface 7, which is embedded in the side wall of the mounting box 3. The two hose interfaces 7 are used to connect the container to be tested and the standard container, respectively, and the air tightness is determined by the differential pressure displayed on the differential pressure transmitter body 1.

[0040] A pressure relief valve 25 is provided on one side of the first pressure vessel shell 12 and the second pressure vessel shell 13 to prevent excessive pressure and to play a role in explosion prevention.

[0041] The mounting box 3 has a switch 5 inside, the base 4 of the air pump 6 has a rubber buffer layer at the bottom, and the mounting box 3 has a rectangular through hole 8 for the support leg 20 to pass through.

[0042] The aforementioned miniature differential pressure transmitter for airtightness testing, when started, requires the operator to first connect the container to be tested and the standard container to two hose interfaces 7 on the side wall of the mounting box 3, forming two independent pressure channels: one for the standard container at the reference pressure end, and the other for the container to be tested at the measuring pressure end. Subsequently, the air pump 6 inside the mounting box 3 is activated. The gas generated by the air pump 6 is delivered via the gas distribution pipe 9 to the two first bend pipes 2, and then enters the first pressure vessel housing 12 and the second pressure vessel housing 13 through the air inlet 18.

[0043] Because a diaphragm chamber and sensing element structure are located between the two pressure vessel shells, the diaphragm will deform and displace when there is a pressure difference between the two chambers. The sensing element inside the differential pressure transmitter body 1 converts this mechanical displacement into an electrical signal, and displays the differential pressure value in real time on the front display screen 11, thereby reflecting the pressure difference between the vessel under test and the standard vessel.

[0044] During airtightness testing, if the container under test leaks, its internal pressure will gradually decrease, causing a change in the pressure difference. By monitoring this pressure difference trend, it is possible to determine whether the sealing performance of the tested object meets the standards.

[0045] To improve measurement accuracy and equipment stability, the differential pressure transmitter body 1 is mounted on a vibration-damping platform 26. The vibration-damping platform 26 is supported by legs 20 that pass through the support platform 21 and can be height-adjusted. After adjustment, the position is fixed by locking bolts 22 to adapt to different experimental environments. Simultaneously, a hydraulic damper 23 and a spring 24 are installed between the vibration-damping platform 26 and the support platform 21, and a rubber layer is bonded to the bottom of the vibration-damping platform 26. These three components work together to effectively absorb external vibration interference, ensuring the stability and accuracy of the measurement process.

[0046] In addition, the differential pressure transmitter body 1 is connected to the shock-absorbing platform 26 through the first clamping plate 19, the first side plate 17 and the connector plate 16 to ensure the overall structure is stable; the first pressure vessel shell 12 and the second pressure vessel shell 13 are connected by the sleeve 15 and the first bolt 14 for easy disassembly and maintenance.

[0047] To improve safety, a pressure relief valve 25 is provided on one side of the first pressure vessel shell 12 and the second pressure vessel shell 13. When the internal pressure of the system exceeds the set threshold, the pressure relief valve 25 automatically opens to release the pressure, preventing equipment damage or safety accidents caused by overpressure.

[0048] In summary, this miniature differential pressure transmitter, through its reasonable structural design and sensor coordination, achieves integrated functions of differential pressure measurement and airtightness detection. It has advantages such as high measurement accuracy, good stability, convenient operation, and safety and reliability, and is suitable for airtightness detection of various precision equipment, pipeline systems, or containers.

[0049] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A miniature differential pressure transmitter for airtightness detection, comprising a mounting box (3), characterized in that: The upper part of the mounting box (3) is fixedly connected to a support platform (21). The upper part of the support platform (21) is provided with a shock-absorbing plate (26). The lower part of the shock-absorbing plate (26) is welded with a support leg (20). The shock-absorbing plate (26) is provided with a through hole for the support leg (20) to pass through. The front side of the support platform (21) is connected with a locking bolt (22). The upper part of the shock-absorbing plate (26) is provided with a differential pressure transmitter body (1). The differential pressure transmitter body (1) is equipped with a first pressure vessel housing (12) and a second pressure vessel housing (13). The first pressure vessel housing (12) and the second pressure vessel housing (13) are equipped with a connector plate (16). The connector plate (16) is connected with a first side plate (17). The first side plate (17) is connected with a first clamping plate (19). The first clamping plate (19) is connected to the shock-absorbing plate (26).

2. A miniature differential pressure transmitter for airtightness detection according to claim 1, characterized in that: A hydraulic damper (23) is provided between the damping plate (26) and the support plate (21). A spring (24) is sleeved on the outside of the hydraulic damper (23). A rubber layer is bonded to the damping plate (26).

3. A miniature differential pressure transmitter for airtightness detection according to claim 1, characterized in that: The first pressure vessel shell (12) and the second pressure vessel shell (13) are respectively welded with sleeves (15), and the first pressure vessel shell (12) and the second pressure vessel shell (13) are connected by a first bolt (14).

4. A miniature differential pressure transmitter for airtightness detection according to claim 1, characterized in that: The differential pressure transmitter body (1) is provided with a display screen (11) on the front side, and an air inlet (18) is connected to the right side of the first pressure vessel housing (12) and the second pressure vessel housing (13).

5. A miniature differential pressure transmitter for airtightness detection according to claim 4, characterized in that: The air inlet (18) is connected to a first bend (2), and the mounting box (3) is equipped with an air pump (6), and the air outlet of the air pump (6) is connected to a distribution pipe (9).

6. A miniature differential pressure transmitter for airtightness detection according to claim 5, characterized in that: The upper end of the gas distribution pipe (9) is connected to the first bend pipe (2), and the right end of the gas distribution pipe (9) is connected to the detection pipe (10).

7. A miniature differential pressure transmitter for airtightness detection according to claim 6, characterized in that: The right side of the detection tube (10) is connected to a hose interface (7), which is embedded in the side wall of the mounting box (3). A pressure relief valve (25) is provided on one side of the first pressure vessel shell (12) and the second pressure vessel shell (13).

8. A miniature differential pressure transmitter for airtightness detection according to claim 5, characterized in that: The mounting box (3) is equipped with a switch (5) inside, the base (4) of the air pump (6) is equipped with a rubber buffer layer at the bottom, and the mounting box (3) is provided with a rectangular through hole (8).

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