Single flange differential pressure transmitter with protection mechanism

Abstract

The utility model discloses a single flange differential pressure transmitter with protection mechanism, including the protection cover that constitutes by two half cover body, through the protection cover to single flange differential pressure transmitter is covered protection, the cover of protection cover is respectively by the shell, the inner shell of being located the inside of shell and the flow guide layer of being located the junction of shell and inner shell constitute, a plurality of air holes are seted up on the inner shell, refrigeration subassembly is set respectively in the two half cover body one side of protection cover for the air in the inside of protection cover is inhaled and pre -cooling temperature reduction, the cold air in cold air box is continuously sucked to the flow guide layer through the fan, and the air after heat exchange is re -entered cold air box and carries out pre -cooling temperature reduction with air hole to differential pressure transmitter and covers the air cooling, and the airflow is re -entered cold air box and carries out pre -cooling temperature reduction, so circulate under, make protection cover inner chamber and transmitter equipment always be in a reasonable low temperature environment, to prevent single flange differential pressure transmitter from being affected by high temperature environment and reducing the determination precision.

Description

Technical Field

[0001] This utility model relates to the field of protection technology for single-flange differential pressure transmitters, specifically a single-flange differential pressure transmitter with a protection mechanism. Background Technology

[0002] A single-flange differential pressure transmitter is an industrial measuring instrument installed via a flange interface, primarily used to measure the level, density, and pressure of liquids, gases, or vapors. Its main principle is to transmit process pressure to a sensing diaphragm through an isolation diaphragm and a filling fluid. The displacement of the sensing diaphragm changes with the applied differential pressure, which is then converted into an electrical signal output. Because the isolation diaphragm is in direct contact with the medium, it eliminates the need for pressure-conducting tubing, making it suitable for environments with complex media such as high temperature, high viscosity, easy crystallization, and strong corrosion.

[0003] Single-flange differential pressure transmitters are sometimes installed outdoors or in equipment rooms with consistently high temperatures, depending on actual needs. However, during long-term use, we have found that the accuracy of single-flange differential pressure transmitters can be affected by factors such as material properties, electronic components, and structural design, especially at high temperatures. Furthermore, chemical corrosion at high temperatures can also affect their measurement stability. In contrast, low temperatures have a smaller impact on single-flange differential pressure transmitters. While low temperatures may affect their normal operation, they generally do not impact their performance as significantly as high temperatures.

[0004] Therefore, a protective cover structure for insulating and cooling the existing single-flange differential pressure transmitter is designed. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] Therefore, the purpose of this utility model is to provide a single-flange differential pressure transmitter with a protection mechanism to solve the problem mentioned in the background art that the accuracy of the single-flange differential pressure transmitter is sometimes affected by factors such as its material properties, electronic components, and structural design in high-temperature environments; in addition, chemical corrosion at high temperatures can also affect its measurement stability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a single-flange differential pressure transmitter with a protection mechanism, comprising a protective cover formed by two half-covers enclosing each other, which protects the single-flange differential pressure transmitter. The protective cover is composed of an outer shell, an inner shell located inside the outer shell, and a flow guiding layer located at the junction of the outer shell and the inner shell. The inner shell has several air holes. The cooling components are respectively located on one side of the two halves of the protective cover. They are used to draw in and pre-cool the air inside the protective cover, and then blow the cold air into the guide layer.

[0008] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, the side wall of the half-enclosure has a vent that extends directly into the inner cavity of the protective cover. The cooling assembly includes a cooling box with one end connected to the air vent, a semiconductor cooling chip disposed on one side of the cooling box, a fan disposed on the outside of the half-cover, and an air duct with one end connected to the fan input and the other end connected to the cooling box. The fan is connected to the airflow layer.

[0009] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, the upper end of the protective cover is further provided with terminal sleeves on both sides, and a sealing ring is matched on the inner side of the terminal sleeves. The terminal sleeve is divided into two semicircles and fixed to the two side half-covers in sequence.

[0010] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, the lower side of the protective cover also has a valve pipe clearance port, and the valve pipe clearance ports are respectively opened on the half-covers on both sides.

[0011] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, the upper side of the protective cover also has an observation hole, and the inner side of the observation hole has double-layered vacuum glass.

[0012] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, a plurality of mounting ears arranged in pairs are provided on the outer side of the junction of the two half-covers. The mounting ears are provided with mounting holes, and each group of mounting ears is connected by bolts.

[0013] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, a sealing strip is also provided on the periphery of the junction of the two half-enclosures.

[0014] As a preferred embodiment of the single-flange differential pressure transmitter with a protection mechanism described in this utility model, the outer wall of the protective cover also has a heat insulation layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: When the single-flange differential pressure transmitter with a protection mechanism needs to be cooled, the control unit will promptly activate the semiconductor cooling chip and fan. The fan continuously draws the cold air in the cooling box into the guide layer, and uses the air vents to cover the differential pressure transmitter for air cooling. The airflow after heat exchange will re-enter the cooling box through the vent for pre-cooling. In this cycle, the inner cavity of the protective cover and the transmitter equipment are always in a reasonable low temperature environment, thereby preventing the single-flange differential pressure transmitter from being affected by the high temperature environment and reducing the measurement accuracy, and further improving the service life and operational stability of the transmitter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the semi-enclosed body of this utility model; Figure 3 This is a schematic diagram of the refrigeration component structure of this utility model.

[0017] In the diagram: 100, protective cover; 1001, valve pipe clearance port; 1002, vent; 1003, observation hole; 110, outer shell; 120, inner shell; 1201, vent; 130, air guide layer; 140, double-layer vacuum glass; 150, half-cover; 200, refrigeration component; 210, cold air box; 220, semiconductor refrigeration chip; 230, fan; 240, air guide pipe; 300, terminal sleeve; 310, sealing ring; 400, mounting ear; 410, bolt; 500, sealing strip. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0021] Figures 1-3 The diagram shown is a complete structural schematic of a single-flange differential pressure transmitter with a protection mechanism according to this utility model. Please refer to [link / reference]. Figures 1-3 This embodiment of a single-flange differential pressure transmitter with a protection mechanism includes a protective cover 100 formed by two half-covers 150 enclosing each other. The protective cover 100 covers and protects the single-flange differential pressure transmitter. The cover of the protective cover 100 is composed of an outer shell 110, an inner shell 120 located inside the outer shell 110, and a flow guide layer 130 located at the junction of the outer shell 110 and the inner shell 120. The inner shell 120 has a plurality of air holes 1201. Cooling components 200 are respectively disposed on one side of the two half-covers 150 of the protective cover 100, and are used to draw in and pre-cool the air inside the protective cover 100, and then blow the cold air into the flow guide layer 130.

[0022] The side wall of the semi-enclosed housing 150 has a vent 1002 that extends directly into the inner cavity of the protective housing 100. The cooling assembly 200 includes a cooling box 210 connected at one end to the vent 1002, a semiconductor cooling chip 220 disposed on one side of the cooling box 210, a fan 230 disposed on the outside of the semi-enclosed housing 150, and a duct 240 connected at one end to the input end of the fan 230 and at the other end to the cooling box 210; wherein, the fan 230 is connected to the flow guide layer 130. It can be understood that the outline of the protective housing 100 matches the outer outline of the single-flange differential pressure transmitter; in addition, the fan 230 and the semiconductor cooling chip 220 are connected to the mains power through wires. In practical applications, the protective housing 100 device should also be equipped with a temperature sensor and a microcontroller. The temperature sensor is used to monitor the real-time temperature of the inner cavity of the protective housing 100 or the single-flange differential pressure transmitter. When the temperature reaches or exceeds the set upper limit value, the microcontroller will start and run the cooling assembly 200 in a timely manner after receiving the information feedback. The upper end of the protective cover 100 also has terminal sleeves 300 on both sides, and a sealing ring 310 is matched inside the terminal sleeve 300; the terminal sleeve 300 is divided into two semicircles and is fixed to the half-covers 150 on both sides in sequence. In actual installation, the sealing ring 310 is sleeved on the outside of the wiring terminals of the single flange differential pressure transmitter. In actual installation, the terminal sleeve 300 can seal the gaps around the wiring terminals through the sealing ring 310, preventing the entry of external hot air and preventing the escape of cold air inside the cover.

[0023] The lower side of the protective cover 100 also has a valve pipe clearance port 1001, which is located on both sides of the half-cover 150. In actual installation, the valve pipe clearance port 1001 corresponds to the inlet / outlet / liquid valve of the single-flange differential pressure transmitter. After the protective cover 100 is installed around the inlet / outlet / liquid valve, sealing foam can be injected between the inside of the valve pipe clearance port 1001 and the outside of the inlet / outlet / liquid valve to seal this irregular gap and prevent cross-contamination of internal and external air. The upper side of the protective cover 100 also has an observation hole 1003, with a double-layered vacuum glass 140 inside. The double-layered vacuum glass 140 provides thermal insulation, allowing operators to observe the display instrument readings of the single-flange differential pressure transmitter through the observation hole 1003 and the double-layered vacuum glass 140 – a simple and practical method. Specifically, in this embodiment, when it is necessary to cool down the single-flange differential pressure transmitter, the control unit will promptly activate the semiconductor cooling chip 220 and the fan 230. The fan 230 continuously draws the cold air in the cold air box 210 into the guide layer 130, and uses the air vent 1201 to cover the differential pressure transmitter for air cooling. The airflow after heat exchange will re-enter the cold air box 210 through the air vent 1002 for pre-cooling. In this cycle, the inner cavity of the protective cover 100 and the transmitter equipment are always in a reasonable low temperature environment, thereby preventing the single-flange differential pressure transmitter from being affected by the high temperature environment and reducing the measurement accuracy.

[0024] Furthermore, multiple mounting ears 400, arranged in pairs, are provided on the outer side of the junction of the two semi-enclosures 150. Each mounting ear 400 has mounting holes, and each pair of mounting ears 400 is connected by bolts 410. It can be understood that at least two sets of mounting ears 400 are provided; for example, one set can be provided at the upper and lower ends of the protective cover 100. Through the cooperation of the mounting ears 400 and bolts 410, the protective cover 100 and the single-flange differential pressure transmitter can be installed and removed, which is simple and easy to operate.

[0025] Furthermore, a sealing strip 500 is provided around the junction of the two half-covers 150. The sealing strip 500 can seal the junction gap of the two half-covers 150 after they are joined together, preventing cold air from leaking out.

[0026] Furthermore, the outer wall of the protective cover 100 also has a heat insulation layer. The heat insulation layer can be a heat insulation coating or a heat insulation board that matches the cover. The heat insulation layer can further prevent and reduce the loss of cold energy inside the protective cover 100 and prevent the intrusion of external heat.

[0027] In summary, this embodiment of a single-flange differential pressure transmitter with a protection mechanism, when used, requires cooling of the single-flange differential pressure transmitter. The control unit promptly activates the semiconductor cooling chip 220 and the fan 230. The fan 230 continuously draws cold air from the cold air box 210 into the guide layer 130, and uses the air vent 1201 to provide a covering-type air cooling effect on the differential pressure transmitter. The airflow after heat exchange re-enters the cold air box 210 through the air vent 1002 for pre-cooling. This cycle ensures that the inner cavity of the protective cover 100 and the transmitter are always in a reasonably low temperature environment, thereby preventing the single-flange differential pressure transmitter from being affected by high temperature environments and reducing measurement accuracy, further improving the transmitter's service life and operational stability.

[0028] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A single-flange differential pressure transmitter with a protection mechanism, characterized in that, The protective cover (100) consists of two half-covers (150) enclosing each other, which protects the single flange differential pressure transmitter. The protective cover (100) is composed of an outer shell (110), an inner shell (120) located inside the outer shell (110), and a flow guide layer (130) located at the junction of the outer shell (110) and the inner shell (120). The inner shell (120) has several air holes (1201). The cooling components (200) are respectively disposed on one side of the two half-covers (150) of the protective cover (100) to draw in and pre-cool the air inside the protective cover (100) and then blow the cold air into the guide layer (130).

2. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: The side wall of the half-cover (150) has a vent (1002) that extends directly into the inner cavity of the protective cover (100). The cooling assembly (200) includes a cooling box (210) with one end connected to the air vent (1002), a semiconductor cooling chip (220) disposed on one side of the cooling box (210), a fan (230) disposed on the outside of the half-cover (150), and an air duct (240) with one end connected to the input end of the fan (230) and the other end connected to the cooling box (210). The fan (230) is connected to the airflow layer (130).

3. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: The upper sides of the protective cover (100) are also provided with terminal sleeves (300), and the inner side of the terminal sleeves (300) is matched with a sealing ring (310). The terminal sleeve (300) is divided into two semicircles and fixed to the two side half-covers (150) in sequence.

4. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: The lower side of the protective cover (100) also has a valve pipe clearance port (1001), and the valve pipe clearance port (1001) is opened on the half cover (150) on both sides respectively.

5. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: The protective cover (100) also has an observation hole (1003) on one side of its upper part, and the observation hole (1003) has a double-layer vacuum glass (140) inside.

6. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: Multiple mounting ears (400) are provided on the outer side of the junction of the two half-covers (150), which are arranged in pairs. The mounting ears (400) are provided with mounting holes, and each set of mounting ears (400) is connected by bolts (410).

7. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: The periphery of the junction of the two half-covers (150) also has a sealing strip (500).

8. A single-flange differential pressure transmitter with a protection mechanism according to claim 1, characterized in that: The outer wall of the protective cover (100) also has a heat insulation layer.

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