Pressure transmitter

Abstract

The utility model belongs to the technical field of pressure transmitters, and particularly relates to a pressure transmitter with a novel structure. According to the specific scheme, the pressure sensor comprises a pressure signal receiving assembly, a signal conversion assembly, a shell assembly and a signal transmission assembly, the signal transmission assembly comprises a customized aviation socket, the shell assembly comprises a shell, an aviation socket connector is arranged at one end of the shell, and the customized aviation socket is arranged on the inner side of the aviation socket connector. An aviation socket nut is arranged on the outer side of the aviation socket joint; a signal conversion assembly is arranged in the shell, and the pressure signal receiving assembly comprises a pressure core body and a core body base used for containing the pressure core body. According to the pressure transmitter provided by the utility model, sealing structures are arranged at multiple positions, the sealing effect is better, the customized aviation socket is detachable through structures such as the customized aviation socket and the aviation socket nut, different working environments can be conveniently coped, self-defined change of internal flat cables can be realized, and the overall structure is smaller in size and lighter in weight.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure transmitters, and in particular relates to a pressure transmitter with a new structure. Background Art

[0002] Pressure transmitter is a device that converts pressure signal into electrical signal for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by pressure measuring element sensor into standard electrical signals (such as 4-20mA DC, etc.) to supply secondary instruments such as indicator alarm, recorder, regulator for measurement, indication and process adjustment. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent building, production automatic control, aerospace, military industry, petrochemical, oil well, electric power, shipbuilding, machine tools, pipelines and many other industries.

[0003] There are some problems with existing pressure transmitters:

[0004] First, the internal core of the existing pressure transmitter is mostly sealed with an O-ring, which is prone to aging and damage, and loses the sealing effect;

[0005] Second, the electrical interfaces of existing pressure transmitters include aviation socket type and other types. Among them, most aviation sockets are standard parts, which makes them unsuitable in some working environments. For example, the pressure transmitter is too large, has many components, or is not tightly sealed.

[0006] Third, most of the existing pressure transmitter housings are threaded, and the threaded connections are sealed with thread sealant. During mass production, uneven glue application or forgetting to apply glue may occur, affecting the sealing performance of the transmitter.

[0007] Fourth, the aviation sockets of existing pressure transmitters are mostly non-detachable. In certain specific environments, users cannot change the lead definitions of the internal electrical connections, which causes inconvenience to users. Utility Model Content

[0008] In order to solve the above problems, the utility model proposes a pressure transmitter with a novel structure, a detachable and replaceable aviation plug and a better overall sealing effect.

[0009] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme, including a housing component, one end of the housing component is connected to a pressure signal receiving component for collecting pressure medium signals, a signal conversion component for converting the pressure medium signal into an electrical signal is arranged inside the housing component, an electrical signal transmission component is arranged at the other end of the housing component, the pressure signal receiving component is connected to the signal conversion component, and the signal conversion component is connected to the electrical signal transmission component;

[0010] The signal transmission component includes a customized aviation socket, and the shell component includes a shell. An aviation socket connector is arranged at one end of the shell. The customized aviation socket is arranged on the inner side of the aviation socket connector. An aviation socket nut is arranged on the outer side of the aviation socket connector. The aviation socket connector and the aviation socket nut are connected by threads.

[0011] As a preferred solution of the utility model, the signal conversion component includes a conditioning board and an adapter board, the conditioning board and the adapter board are connected by a pin header and a female header, the adapter board is connected to a fixing ring by a fixing screw, the fixing screw jacket is provided with an insulating fixing sleeve, and the conditioning board is connected to the customized aviation socket by a cable.

[0012] As another preferred embodiment of the utility model, the pressure signal receiving assembly includes a pressure core and a core base, one end of the core base is arranged inside the shell, and the other end is arranged outside the shell, the end of the core base arranged inside the shell is provided with a mounting groove for accommodating the pressure core, and the end of the core base arranged outside the shell is provided with a pressure groove for accommodating the medium, the mounting groove and the pressure groove are connected through a pressure hole, the Kovar needle on the pressure core is connected to the mounting hole on the adapter plate through a fixing ring, and the pressure core is arranged in the mounting groove of the core base.

[0013] As a third preferred solution of the utility model, a first sealing ring is arranged between the customized aviation socket and the aviation socket connector, and a first positioning groove matching the first sealing ring is arranged on the outer side of the customized aviation socket.

[0014] As a fourth preferred embodiment of the present invention, a second sealing ring is provided between the core base and the shell, and a second positioning groove matching with the second sealing ring is provided on the outer side of the core base.

[0015] As a fifth preferred embodiment of the present utility model, the outer side of one end of the core base disposed outside the shell is a hexagonal structure.

[0016] As a sixth preferred solution of the utility model, a polytetrafluoroethylene gasket for auxiliary sealing is arranged at the bottom of the installation groove on the core base for accommodating the pressure core.

[0017] As a seventh preferred embodiment of the present invention, the pressure hole has a diameter of 3.5 mm.

[0018] Beneficial effects of the utility model:

[0019] 1. The customized aviation socket of the utility model is detachable. By twisting the aviation socket nut and removing the aviation socket nut from the aviation socket connector, the customized aviation socket can be separated from the aviation socket connector, which is convenient for replacing different aviation socket connectors to cope with different working environments. After removing the aviation socket connector, the wiring in the signal conversion component can also be changed to achieve customization of the internal wiring cable;

[0020] 2. The utility model has a good sealing effect. A first sealing ring is arranged between the customized aviation socket and the aviation socket joint, a second sealing ring is arranged between the core base and the shell, a polytetrafluoroethylene gasket is arranged at the bottom of the installation groove of the core base accommodating the pressure core, and a water pattern structure is formed at the contact between the core base and the pressure core, thereby achieving a higher sealing effect;

[0021] 3. The utility model optimizes the structure, and on the basis of satisfying the customer's performance requirements, it also realizes the miniaturization and lightweight of the pressure transmitter, reduces the possibility of problems such as seal aging failure, and takes into account the characteristics of simple assembly and convenient mass production, thereby improving production efficiency and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0024] Figure 3 It is a half-section view of the overall structure of the utility model.

[0025] Figure 4 Schematic diagram of the signal transmission component structure.

[0026] Figure 5 This is a schematic diagram of the structure of the pressure signal receiving component.

[0027] In the attached figure:

[0028] 1 is a signal transmission component; 1001 is a customized aviation socket; 1002 is a first sealing ring; 1003 is an aviation socket nut;

[0029] 2 is the housing assembly; 2001 is the aviation socket connector; 2002 is the housing;

[0030] 3 is a signal conversion component; 3001 is a conditioning board; 3002 is an adapter board; 3003 is a pin header; 3004 is a female header; 3005 is an insulating fixing sleeve; 3006 is a fixing screw; 3007 is a fixing ring;

[0031] 4 is a pressure signal receiving component; 4001 is a pressure core; 4002 is a core base; 4003 is a second sealing ring; 4004 is a polytetrafluoroethylene gasket. DETAILED DESCRIPTION

[0032] The utility model adopts the following specific scheme, such as Figure 1-3 As shown, the utility model includes a housing component 2, one end of the housing component 2 is connected to a pressure signal receiving component 4 for collecting pressure medium signals, a signal conversion component 3 for converting pressure medium signals into electric signals is arranged inside the housing component 2, and an electric signal transmission component 1 is arranged at the other end of the housing component 2. The electric signal transmission component 1 is the electrical connection end of the pressure transmitter, responsible for transmitting the electric signal to the user information collection location for the user to use, and taking into account the functions of sealing and protecting internal components. The pressure signal receiving component 4 is connected to the signal conversion component 3, and the signal conversion component 3 is connected to the electric signal transmission component 1;

[0033] The signal transmission component 1 is independently designed and the design and manufacturing standard is MIL-C-26482;

[0034] like Figure 2-4 As shown, the signal transmission component 1 includes a customized aviation socket 1001, and the shell component 2 includes a shell 2002. An aviation socket connector 2001 is provided at one end of the shell 2002. The customized aviation socket 1001 is provided on the inner side of the aviation socket connector 2001, and an aviation socket nut 1003 is provided on the outer side of the aviation socket connector 2001. The aviation socket connector 2001 and the aviation socket nut 1003 are connected by threads, and the aviation socket connector 2001 is provided with external threads, and the aviation socket nut 1003 is provided with internal threads.

[0035] The customized aviation socket 1001 can be disassembled by twisting and removing the aviation socket nut 1003, which is convenient for replacement and adaptability to different working environments. The wiring inside the shell 2002 can also be customized after the customized aviation socket 1001 is disassembled.

[0036] As a preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the signal conversion component 3 includes a conditioning board 3001 and an adapter board 3002, the conditioning board 3001 and the adapter board 3002 are connected via a pin header 3003 and a female header 3004, the adapter board 3002 is connected to a fixing ring 3007 via a fixing screw 3006, the fixing screw 3006 is covered with an insulating fixing sleeve 3005, and the conditioning board 3001 is connected to the customized aviation socket 1001 via a cable.

[0037] As another preferred embodiment of the present invention, Figure 5As shown, the pressure signal receiving component 4 includes a pressure core 4001 and a core base 4002, one end of the core base 4002 is arranged inside the shell 2002, and the other end is arranged outside the shell 2002, the end of the core base 4002 arranged inside the shell 2002 is provided with a mounting groove for accommodating the pressure core 4001, and the end of the core base 4002 arranged outside the shell 2002 is provided with a pressure groove for accommodating the medium, the mounting groove and the pressure groove The two are connected through a pressure hole, and the pressure hole is used to measure the medium contacting the core diaphragm. The Kovar needle on the pressure core 4001 is connected to the mounting hole on the adapter plate 3002 through the fixing ring 3007. The pressure core 4001 is arranged in the mounting groove of the core base 4002. The pressure core 4001 is provided with an external thread, and the mounting groove of the core base 4002 is provided with an internal thread. The pressure core 4001 and the core base 4002 are first connected by threads and then fixed by welding.

[0038] The pressure of the medium in the pressure groove is slowly applied to the pressure core 4001 through the pressure hole, thereby achieving a protective effect on the pressure core 4001.

[0039] As a third preferred solution of the utility model, a first sealing ring 1002 is arranged between the customized aviation socket 1001 and the aviation socket connector 2001 , and a first positioning groove matching the first sealing ring 1002 is arranged on the outer side of the customized aviation socket 1001 .

[0040] As a fourth preferred solution of the present utility model, a second sealing ring 4003 is arranged between the core base 4002 and the shell 2002 , and a second positioning groove matching with the second sealing ring 4003 is arranged on the outer side of the core base 4002 .

[0041] As the fifth preferred embodiment of the present invention, the outer side of one end of the core base 4002 disposed outside the shell 2002 is a hexagonal structure, similar to a hexagonal nut, with a specification of SW22. The user can use this structure to quickly install the pressure transmitter to the place of use.

[0042] As the sixth preferred embodiment of the utility model, a polytetrafluoroethylene gasket 4004 for auxiliary sealing is provided at the bottom of the installation groove on the core base 4002 for accommodating the pressure core 4001, and a water ripple structure is formed at the junction of the core base 4002 and the pressure core 4001 to improve the sealing performance.

[0043] As a seventh preferred embodiment of the present invention, the pressure hole has a diameter of 3.5 mm.

[0044] Assembly method of the utility model:

[0045] First, install the PTFE gasket 4004 to the bottom of the core base 4002 installation groove to play a sealing role; then screw the pressure core 4001 into the core base 4002 installation groove until it is tightened, and then use the laser welding process to weld the pressure core 4001 and the core base 4002 together, and then install the second sealing ring 4003 to the second positioning slot on the core base 4002, and then pass the fixing ring 3007 through the Kovar needle of the pressure core 4001, and then fix the adapter plate 3002 on the fixing ring 3007 through the fixing screw 3006 with an insulating fixing sleeve 3005 on the outside, and at the same time, the Kovar needles on the pressure core 4001 need to be passed through the installation holes on the adapter plate 3002 one by one for welding, and then the fixing ring 3007 is welded to the pressure core 4001 by laser welding. It should be noted that " "It must be fully welded" to ensure its sealing performance; connect the conditioning board 3001 and the adapter board 3002 together through the pin header 3003 and the female header 3004, screw the shell component 2 on the signal receiving component 4, and weld the two components together using a laser welding process after tightening; use potting glue to pot the shell component 2 to a specified height, and after the potting glue is completely cured, use a cable to connect the conditioning board 3001 and the customized aviation socket 1001 together, and then install the first sealing ring 1002 into the first positioning card slot on the customized aviation socket 1001, and then assemble the customized aviation socket 1001 into the aviation socket connector 2001; finally, pass the aviation socket nut 1003 through the customized aviation socket 1001, screw it onto the aviation socket connector 2001, and the aviation socket connector 2001 and the aviation socket nut 1003 are connected by threads. Complete the assembly of this pressure transmitter.

[0046] Experimental verification shows that the pressure transmitter of the utility model can withstand a pressure of up to 100 MPa for a long time through structural improvements. At the same time, the outer diameter of the entire structure can be less than 25 mm, the length is less than 90 mm, and the overall weight is less than 150 g. The structure is more compact and lightweight, but the pressure-bearing capacity is improved.

[0047] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. A pressure transmitter, characterized in that: The housing assembly (2) comprises a pressure signal receiving assembly (4) for collecting pressure medium signals connected to one end of the housing assembly (2); a signal conversion assembly (3) for converting the pressure medium signals into electrical signals is arranged inside the housing assembly (2); a signal transmission assembly (1) is arranged at the other end of the housing assembly (2); the pressure signal receiving assembly (4) is connected to the signal conversion assembly (3); and the signal conversion assembly (3) is connected to the signal transmission assembly (1); The signal transmission component (1) comprises a customized aviation socket (1001), and the housing component (2) comprises a housing (2002). An aviation socket connector (2001) is arranged at one end of the housing (2002), the customized aviation socket (1001) is arranged on the inner side of the aviation socket connector (2001), and an aviation socket nut (1003) is arranged on the outer side of the aviation socket connector (2001). The aviation socket connector (2001) and the aviation socket nut (1003) are connected by threads.

2. A pressure transmitter according to claim 1, characterized in that: The signal conversion component (3) comprises a conditioning board (3001) and an adapter board (3002); the conditioning board (3001) and the adapter board (3002) are connected via a pin header (3003) and a female header (3004); the adapter board (3002) is connected to a fixing ring (3007) via a fixing screw (3006); an insulating fixing sleeve (3005) is provided on the outer cover of the fixing screw (3006); and the conditioning board (3001) is connected to the customized aviation socket (1001) via a cable.

3. A pressure transmitter as claimed in claim 2, characterized in that: The pressure signal receiving component (4) comprises a pressure core (4001) and a core base (4002); one end of the core base (4002) is arranged inside the shell (2002), and the other end is arranged outside the shell (2002); one end of the core base (4002) arranged inside the shell (2002) is provided with a mounting groove for accommodating the pressure core (4001); one end of the core base (4002) arranged outside the shell (2002) is provided with a pressure groove for accommodating a medium; the mounting groove and the pressure groove are connected via a pressure hole; the Kovar needle on the pressure core (4001) is connected to the mounting hole on the adapter plate (3002) via a fixing ring (3007); and the pressure core (4001) is arranged in the mounting groove of the core base (4002).

4. A pressure transmitter according to claim 1, characterized in that: A first sealing ring (1002) is arranged between the customized aviation socket (1001) and the aviation socket connector (2001), and a first positioning slot matching the first sealing ring (1002) is arranged on the outer side of the customized aviation socket (1001).

5. A pressure transmitter as claimed in claim 3, characterized in that: A second sealing ring (4003) is arranged between the core base (4002) and the shell (2002), and a second positioning groove matching the second sealing ring (4003) is arranged on the outer side of the core base (4002).

6. A pressure transmitter as claimed in claim 3, characterized in that: The outer side of one end of the core base (4002) disposed outside the shell (2002) is a hexagonal structure.

7. A pressure transmitter as claimed in claim 3, characterized in that: A polytetrafluoroethylene gasket (4004) for auxiliary sealing is arranged at the bottom of the installation groove on the core base (4002) for accommodating the pressure core (4001).

8. A pressure transmitter as claimed in claim 3, characterized in that: The pressure hole has a diameter of 3.5 mm.

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