Glass micro-melting pressure transmitter simple and convenient to assemble

Abstract

The utility model discloses a glass micro-melting pressure transmitter easy and convenient to assemble, which comprises a pressing head assembly, a support assembly, an electrical connector assembly, a sensor metal tube shell, a rubber gasket and an amplification circuit board, the pressing head assembly is arranged at the lower part of the sensor metal tube shell, and the support assembly and the amplification circuit board are arranged in the sensor metal tube shell. The electrical connector assembly is arranged at the upper part of the sensor metal tube; the support assembly comprises a plastic support and an adapter plate. The electrical connector assembly comprises an electrical connector, and the bottom surface of the electrical connector is provided with electrical connector pins. A signal line on the top surface of the amplification circuit board is connected with an electrical connector pin, the bottom surface of the amplification circuit board and the top surface of the adapter plate are fixed through a welding pin header, and the bottom of the plastic bracket is fixed at the top of the pressure head assembly; the top face of the sensor metal tube shell is fixed to the lower portion of the electrical connector assembly, and the bottom face of the sensor metal tube shell is fixed to the outer wall of the pressure inlet head assembly. The support is very firm and reliable after being assembled, and the risk that the support falls off does not exist.

Description

Technical Field

[0001] The utility model belongs to the technical field of instruments and meters, and particularly relates to a glass micro-melting pressure transmitter with simple assembly. Background Art

[0002] A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission, and is one of the most common sensors in the industrial field nowadays. Among them, the glass micro-melting pressure transmitter is widely used in the pressure measurement of gases, liquids, and steam in various industries such as electric power, metallurgy, petrochemical, aerospace, and automotive due to its high precision, strong anti-interference ability, and high anti-overload and anti-impact ability. At the same time, the production cost of the glass micro-melting pressure transmitter is relatively low, and the relatively low production cost has a more attractive price in the market, which helps to attract more customers.

[0003] Currently, in the assembly of the plastic bracket of the sensor amplifier circuit board on the market, most of the assembly schemes use an adhesive to fasten the plastic bracket inside the transmitter housing. During the assembly process, the operator needs to apply the adhesive on the surface of the plastic bracket, and such an operation has several disadvantages. First, the operator has high requirements for controlling the amount of the adhesive, and the working hours of the adhesive application and assembly process are relatively long, and the efficiency is relatively low. Second, if the excess glue is not removed, it will affect the assembly of other housings and there is a risk of the bracket falling off. Third, the disassembly during maintenance is also time-consuming and laborious, and the purpose of reliable assembly and easy disassembly cannot be achieved. Summary of the Invention

[0004] The purpose of the utility model is to aim at the deficiencies of the above-mentioned prior art, and provide a glass micro-melting pressure transmitter with simple assembly, which is very firm and reliable after assembly, has no risk of the bracket falling off, and also has the characteristics of simple maintenance and disassembly.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A glass micro-melt pressure transmitter with easy assembly, which includes an inlet pressure head assembly, a bracket assembly, an electrical connector assembly, a sensor metal shell, a rubber gasket and an amplification circuit board. The inlet pressure head assembly is arranged at the lower part of the sensor metal shell. The bracket assembly is connected to the amplification circuit board and arranged inside the sensor metal shell. The electrical connector assembly is arranged at the upper part of the sensor metal shell. The bracket assembly includes a plastic bracket and a transfer board. The transfer board is fixed on the plastic bracket, and welding pins are arranged on the top surface of the transfer board. The electrical connector assembly includes an electrical connector and a welding metal ring. The welding metal ring is arranged at the lower part of the outer wall of the electrical connector. Electrical connector pins are arranged on the bottom surface of the electrical connector and extend into its interior. Signal lines are arranged on the top surface of the amplification circuit board, and the number of signal lines matches the number of electrical connector pins. The signal lines are correspondingly connected to the electrical connector pins. The bottom surface of the amplification circuit board and the top surface of the transfer board are fixedly connected by welding pins. The bottom of the plastic bracket is fixed on the top of the inlet pressure head assembly. The sensor metal shell includes a shell accommodation cavity. The top surface and the bottom surface of the shell accommodation cavity are both open. The top surface of the shell accommodation cavity and the lower part of the electrical connector assembly are welded and fixed by the welding metal ring. The bottom surface of the shell accommodation cavity is welded to the inlet pressure head limit groove on the outer wall of the inlet pressure head assembly through a tooling.

[0007] Preferably, the inlet pressure head assembly includes an inlet pressure head, a sealing O-ring, a hexagonal lower surface of the inlet pressure head and an upper surface of the inlet pressure head. A sensor chip is convexly arranged at the top end of the inlet pressure head. An inlet pressure head pressure conduction cavity for conducting the medium pressure is arranged inside the inlet pressure head. An upper surface positioning hole of the inlet pressure head is arranged on the upper surface of the inlet pressure head. The sealing O-ring is arranged at the hexagonal lower surface of the inlet pressure head.

[0008] Preferably, positioning posts are arranged on the upper surface of the plastic bracket. Bracket limit grooves protruding outward are symmetrically arranged on both sides of the middle part of the outer wall of the plastic bracket. Bracket lower surface positioning posts for clamping with the upper surface positioning hole of the inlet pressure head are correspondingly arranged on the lower surface of the plastic bracket. Transfer board limit holes for clamping with the positioning posts on the upper surface of the bracket are arranged on the transfer board.

[0009] Preferably, an installation hole for the convex top end of the inlet pressure head to penetrate is correspondingly arranged between the transfer board and the plastic bracket.

[0010] Preferably, the height of the installation hole is consistent with the height of the convex top end of the inlet pressure head.

[0011] Preferably, a layer of metal shell is wrapped around the outer wall of the shell accommodation cavity. The shell accommodation cavity includes an upper shell accommodation cavity and a lower shell accommodation cavity, which are interconnected. Convex blocks are symmetrically arranged on the inner wall of the metal shell and between the upper shell accommodation cavity and the lower shell accommodation cavity.

[0012] Preferably, the transfer board and the amplification circuit board are located in the upper shell accommodation cavity, and the plastic bracket is located in the lower shell accommodation cavity.

[0013] Preferably, a rubber washer is installed on the upper surface of the bracket limit groove, so that the bumps symmetrically arranged between the upper accommodation cavity and the lower accommodation cavity of the tube shell squeeze the upper surface of the bracket limit groove through the rubber washer to achieve the effect of fastening the plastic bracket.

[0014] The beneficial effects of the present utility model are as follows:

[0015] (1) The present utility model uses modular components to cooperate and install with each other. The assembly sequence is to first install the bracket assembly and the inlet pressure head assembly in cooperation, weld the bottom surface of the metal tube shell at the inlet pressure head limit groove, connect the amplifier circuit board and the adapter board through welding pins, and then solder the signal wire to the Pin foot of the electrical connector. Further, the electrical connector assembly is welded to the top surface of the metal tube shell by a welding metal ring. After the assembly is completed, the whole assembly process is simple and labor-saving, and there are no excessive skill requirements for the operator;

[0016] (2) The pressure transmitter of the present utility model has good maintainability. It uses modular components to cooperate and install with each other, and the components inside the components are also relatively independent. Therefore, no damage will be caused during the maintenance and disassembly process. The operator only needs to replace the components to be replaced, which is beneficial to saving the maintenance cost of the product. Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a schematic diagram of the component module of the present utility model;

[0019] Figure 3 is an exploded view of the inlet pressure head assembly in the present utility model;

[0020] Figure 4 is an exploded view of the bracket assembly in the present utility model;

[0021] Figure 5 is an exploded view of the electrical connector assembly in the present utility model;

[0022] In the figure: 1. Inlet pressure head assembly; 11. Inlet pressure head; 12. Sealing O-ring; 13. Sensor chip; 111. Lower hexagonal surface of the inlet pressure head; 112. Inlet pressure head limit groove; 113. Inlet pressure head pressure guiding cavity; 114. Upper surface of the inlet pressure head; 1141. Positioning hole on the upper surface of the inlet pressure head; 2. Bracket assembly; 21. Plastic bracket; 22. Adapter plate; 23. Welding pin header; 24. Mounting hole; 212. Positioning post on the upper surface of the bracket; 213. Bracket limit groove; 215. Positioning post on the lower surface of the bracket; 222. Adapter plate limit hole; 3. Electrical connector assembly; 31. Electrical connector; 32. Welding metal ring; 33. Electrical connector pin; 4. Sensor metal housing; 41. Upper housing cavity; 42. Lower housing cavity; 43. Housing cavity; 5. Rubber gasket; 6. Amplifying circuit board; 61. Signal wire. Detailed implementation mode

[0023] The present utility model will be further described below with reference to the accompanying drawings:

[0024] As Figures 1-5 shown, a glass micro-melting pressure transmitter with simple assembly of the present utility model includes an inlet pressure head assembly 1, a bracket assembly 2, an electrical connector assembly 3, a sensor metal housing 4, a rubber gasket 5 and an amplifying circuit board 6. The inlet pressure head assembly 1 is arranged at the lower part of the sensor metal housing 4. The bracket assembly 2 is connected to the amplifying circuit board 6 and arranged inside the sensor metal housing 4. The electrical connector assembly 3 is arranged at the upper part of the sensor metal housing 4.

[0025] The bracket assembly 2 in the present utility model includes a plastic bracket 21 and an adapter plate 22. The adapter plate 22 is fixed on the plastic bracket 21. A welding pin header 23 is arranged on the top surface of the adapter plate 22. The electrical connector assembly 3 includes an electrical connector 31 and a welding metal ring 32. The welding metal ring 32 is arranged at the lower part of the outer wall of the electrical connector 31. An electrical connector pin 33 is arranged on the bottom surface of the electrical connector 31 and extends into its interior. A signal wire 61 is arranged on the top surface of the amplifying circuit board 6. The number of the signal wires 61 matches the number of the electrical connector pins 33. The signal wires 61 are correspondingly connected to the electrical connector pins 33. The bottom surface of the amplifying circuit board 6 and the top surface of the adapter plate 22 are fixedly connected by the welding pin header 23. The bottom of the plastic bracket 21 is fixed on the top of the inlet pressure head assembly 1. The sensor metal housing 4 includes a housing cavity 43. Both the top surface and the bottom surface of the housing cavity 43 are open. The top surface of the housing cavity 43 and the lower part of the electrical connector assembly 3 are welded and fixed by the welding metal ring 32. The bottom surface of the housing cavity 43 is welded to the inlet pressure head limit groove 112 on the outer wall of the inlet pressure head assembly 1 by a tooling. The housing cavity 43 has good tightness after installation.

[0026] The inlet pressure head assembly 1 in the present utility model includes an inlet pressure head 11, a sealing O-ring 12, the hexagonal lower surface 111 of the inlet pressure head, and the upper surface 114 of the inlet pressure head. A sensor chip 13 is convexly provided at the top end of the inlet pressure head 11. An inlet pressure head pressure guiding cavity 113 for conducting the medium pressure is provided inside the inlet pressure head 11. An inlet pressure head upper surface positioning hole 1141 is provided on the upper surface 114 of the inlet pressure head. The sealing O-ring 12 is arranged at the hexagonal lower surface 111 of the inlet pressure head.

[0027] On the upper surface of the plastic bracket 21 in the present utility model, there are bracket upper surface positioning posts 212. On both sides of the middle part of the outer wall of the plastic bracket 21, there are symmetrically provided outwardly convex bracket limiting grooves 213. Corresponding to the inlet pressure head upper surface positioning hole 1141 on the lower surface of the plastic bracket 21, there is a mutually engaging bracket lower surface positioning post 215. On the adapter plate 22, there is an adapter plate limiting hole 222 for mutually engaging with the bracket upper surface positioning post 212.

[0028] An installation hole 24 for the convex top end of the inlet pressure head 11 to penetrate is correspondingly provided between the adapter plate 22 and the plastic bracket 21 in the present utility model. The height of the installation hole 24 is consistent with the height of the convex top end of the inlet pressure head 11, which is convenient for the operator to connect the sensor chip 13 and the adapter plate 22 by using the wire bonding technology.

[0029] The outer wall of the housing accommodation cavity 43 in the present utility model is wrapped with a metal housing. The housing accommodation cavity 43 includes an upper housing accommodation cavity 41 and a lower housing accommodation cavity 42, which are mutually communicated. On the inner wall of the metal housing and symmetrically between the upper housing accommodation cavity 41 and the lower housing accommodation cavity 42, there are convex blocks. Among them, the adapter plate 22 and the amplifier circuit board 6 are located in the upper housing accommodation cavity 41, and the plastic bracket 21 is located in the lower housing accommodation cavity 42.

[0030] On the upper surface of the bracket limiting groove 213 in the present utility model, a rubber gasket 5 is installed, so that the convex blocks symmetrically arranged between the upper housing accommodation cavity 41 and the lower housing accommodation cavity 42 squeeze the upper surface of the bracket limiting groove 213 through the rubber gasket 5 to achieve the effect of fastening the plastic bracket 21.

[0031] The usage process of the present utility model is as follows:

[0032] Assembly of the components: First, place the sealing O-ring 12 at the hexagonal lower surface 111 of the inlet pressure head to complete the assembly of the inlet pressure head assembly 1; the adapter plate limiting hole 222 on the adapter plate 22 and the bracket upper surface positioning post 212 on the plastic bracket 21 are correspondingly engaged and fixed by using the pulse hot melting technology to complete the assembly of the bracket assembly 2;

[0033] Assembly of the pressure transmitter: First, place the plastic bracket 21 in the bracket assembly 2 on the pressure inlet head assembly 1 by mating the positioning posts 215 on the lower surface of the bracket with the positioning holes 1141 on the upper surface of the pressure inlet head 114. At the same time, the top protrusion of the pressure inlet head assembly 1 penetrates into the corresponding mounting holes 24 between the adapter board 22 and the plastic bracket 21. The height of the mounting holes 24 is consistent with the height of the top protrusion of the pressure inlet head 11, which is convenient for the operator to connect the sensor chip 13 to the adapter board 22 using the wire bonding technology. Further, fix the bottom surface of the amplifier circuit board 6 to the top surface of the adapter board 22 by soldering pins 23. Then, place the rubber washer 5 on the upper surface of the bracket limiting groove 213, and use a tooling to place the lower surface of the sensor metal housing 4 in the pressure inlet head limiting groove 112 on the outer wall of the pressure inlet head assembly 1 and perform welding. At the same time, the protrusions symmetrically arranged between the upper housing cavity 41 and the lower housing cavity 42 of the housing press the upper surface of the bracket limiting groove 213 through the rubber washer 5 to achieve the effect of fastening the plastic bracket 21. Then, connect the signal line 61 on the top surface of the amplifier circuit board 6 to the electrical connector pin 33 on the bottom surface of the electrical connector assembly 3 correspondingly. Finally, weld the electrical connector assembly 3 to the top surface of the housing cavity 43 by welding the metal ring 32.

[0034] Other parts not described in this utility model are the same as the prior art.

Claims

1. A glass micro-melting pressure transmitter with simple assembly, characterized by It comprises a pressure inlet head assembly (1), a bracket assembly (2), an electrical connector assembly (3), a sensor metal tube shell (4), a rubber gasket (5) and an amplifying circuit board (6), wherein the pressure inlet head assembly (1) is arranged at the lower part of the sensor metal tube shell (4), the bracket assembly (2) is connected to the amplifying circuit board (6) and is arranged inside the sensor metal tube shell (4), and the electrical connector assembly (3) is arranged at the upper part of the sensor metal tube shell (4); the bracket assembly (2) comprises a plastic bracket (21) and an adapter plate (22), the adapter plate (22) is fixed on the plastic bracket (21), and a welding pin (23) is provided on the top surface of the adapter plate (22); the electrical connector assembly (3) comprises an electrical connector (31) and a welding metal ring (32), the welding metal ring (32) is arranged at the lower part of the outer wall of the electrical connector (31), and the bottom surface of the electrical connector (31) and extending inside thereof are provided with an electrical connector The top surface of the amplifier circuit board (6) is provided with a signal line (61), and the number of the signal lines (61) matches the number of the electrical connector pins (33); the signal lines (61) are connected to the electrical connector pins (33) correspondingly, the bottom surface of the amplifier circuit board (6) and the top surface of the adapter board (22) are fixedly connected by welding pins (23), and the bottom of the plastic bracket (21) is fixed to the top of the pressure inlet head assembly (1); the sensor metal tube shell (4) includes a tube shell accommodating cavity (43), the top surface and the bottom surface of the tube shell accommodating cavity (43) are both open, the top surface of the tube shell accommodating cavity (43) and the lower part of the electrical connector assembly (3) are welded and fixed by the welding metal ring (32), and the bottom surface of the tube shell accommodating cavity (43) is welded to the pressure inlet head limiting groove (112) on the outer wall of the pressure inlet head assembly (1) by tooling.

2. The glass micro-melting pressure transmitter with easy assembly according to claim 1 is characterized in that The pressure inlet head assembly (1) comprises a pressure inlet head (11), a sealing O-ring (12), a hexagonal lower surface (111) of the pressure inlet head and an upper surface (114) of the pressure inlet head; a sensor chip (13) is provided on a top protrusion of the pressure inlet head (11); a pressure inlet head pressure-conducting cavity (113) for conducting medium pressure is provided in the pressure inlet head (11); a pressure inlet head upper surface positioning hole (1141) is provided on the upper surface (114) of the pressure inlet head; and the sealing O-ring (12) is arranged on the hexagonal lower surface (111) of the pressure inlet head.

3. The glass micro-melting pressure transmitter with easy assembly according to claim 2 is characterized in that The upper surface of the plastic bracket (21) is provided with a bracket upper surface positioning column (212), and the middle of the outer wall of the plastic bracket (21) is symmetrically provided with outwardly protruding bracket limiting grooves (213), and the lower surface of the plastic bracket (21) is provided with a bracket lower surface positioning column (215) corresponding to the upper surface positioning hole (1141) of the pressure inlet head, and the adapter plate (22) is provided with an adapter plate limiting hole (222) for being engaged with the bracket upper surface positioning column (212).

4. The glass micro-melting pressure transmitter with easy assembly according to claim 3 is characterized in that A mounting hole (24) for the top protrusion of the pressure inlet head (11) to penetrate is correspondingly provided between the adapter plate (22) and the plastic bracket (21).

5. The glass micro-melting pressure transmitter with easy assembly according to claim 4 is characterized in that The height of the mounting hole (24) is consistent with the height of the top protrusion of the pressure inlet head (11).

6. The glass micro-melting pressure transmitter with easy assembly according to claim 1 is characterized in that The outer wall of the tube shell accommodating cavity (43) is wrapped with a layer of metal tube shell, the tube shell accommodating cavity (43) comprises an upper tube shell accommodating cavity (41) and a lower tube shell accommodating cavity (42), the upper tube shell accommodating cavity (41) and the lower tube shell accommodating cavity (42) are communicated with each other, and protrusions are symmetrically provided on the inner wall of the metal tube shell and located between the upper tube shell accommodating cavity (41) and the lower tube shell accommodating cavity (42).

7. The glass micro-melting pressure transmitter with easy assembly according to claim 6 is characterized in that The adapter board (22) and the amplifier circuit board (6) are located in the upper accommodating cavity (41) of the tube shell, and the plastic bracket (21) is located in the lower accommodating cavity (42) of the tube shell.

8. The glass micro-melting pressure transmitter with easy assembly according to claim 7 is characterized in that A rubber gasket (5) is installed on the upper surface of the bracket limiting groove (213) of the plastic bracket (21), so that the protrusions symmetrically arranged between the upper housing cavity (41) and the lower housing cavity (42) of the tube shell can press the upper surface of the bracket limiting groove (213) through the rubber gasket (5) to achieve the effect of fastening the plastic bracket (21).

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