CN216483665U - All-welded differential pressure type sensor - Google Patents
All-welded differential pressure type sensor Download PDFInfo
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- CN216483665U CN216483665U CN202122626855.3U CN202122626855U CN216483665U CN 216483665 U CN216483665 U CN 216483665U CN 202122626855 U CN202122626855 U CN 202122626855U CN 216483665 U CN216483665 U CN 216483665U
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Abstract
The utility model discloses an all-welded differential pressure type sensor which comprises a pressure connector, adapter seats, a core body assembly, a circuit board and a base, wherein the pressure connector is welded on the measuring ends on the two sides of the base respectively, the core body assembly is arranged on the base and used for detecting the pressure change of a medium communicated with the two measuring ends, the adapter seats are welded on the upper end of the base, the circuit board is arranged in a groove of the base, the core body assembly is connected with the circuit board through a lead, and the circuit board is connected with a connector through a lead. According to the utility model, the pressure connector, the adapter and the base are welded to reliably seal the pressure connector, so that liquid leakage is avoided, and the sealing ring is not arranged, so that the situation that corrosive substances damage the sealing ring to further cause functional failure of the differential pressure type sensor can be avoided.
Description
Technical Field
The utility model relates to the technical field of sensors, in particular to an all-welded differential pressure type sensor.
Background
The differential pressure sensor is usually used for measuring the pressure difference at two ends of equipment or components, the main measuring component of the isolating membrane differential pressure sensor is a silicon piezoresistive sensing chip, the core part of the chip is a semiconductor silicon membrane, four equal resistors are arranged on the semiconductor silicon membrane and connected into a Wheatstone bridge, one side of the semiconductor silicon membrane is a high-pressure cavity connected with a system to be measured, and the other side of the semiconductor silicon membrane is a low-pressure cavity. When the semiconductor silicon diaphragm deforms due to pressure difference on two sides, the value of the diffusion resistor changes, the bridge loses balance, corresponding voltage is output, and the voltage reflects the pressure difference value borne by the diaphragm.
The pressure joint, adapter and the base of present differential pressure type sensor adopt the assembled to seal, use the sealing washer crimping to seal together in the junction, however the sealing washer can produce the displacement volume in the assembling process, and the corrosion resistance of sealing washer is poor moreover, appears easily that sealing performance is unreliable, and leads to differential pressure sensor inner structure to receive the damage, causes the functional failure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an all-welded differential pressure type sensor, which solves the problems in the prior art, ensures reliable sealing among a pressure joint, an adapter and a base and prolongs the service life.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides an all-welded differential pressure type sensor which comprises pressure connectors, adapter seats, core body assemblies, a circuit board and a base, wherein the pressure connectors are welded on the measuring ends on the two sides of the base respectively, the core body assemblies are arranged on the base and used for detecting pressure changes of media communicated with the two measuring ends, the adapter seats are welded on the upper end of the base, the circuit board is arranged in a groove above the base and is connected with the circuit board through a lead, and the circuit board is connected with a connector through a lead.
Preferably, the core body subassembly includes semiconductor pressure sensitive chip, silicon oil and barrier film piece, the barrier film piece passes through the clamping ring weld in on the measuring end of base both sides, the barrier film with form the silicon oil pocket between the measuring end, two the silicon oil pocket passes through the inside passageway intercommunication of base, the one end of passageway sets up a recess, the silicon oil intracavity is full of silicon oil, semiconductor pressure sensitive chip set up in the recess.
Preferably, the measuring ends at two sides of the base are respectively a high-pressure end and a low-pressure end, the pressure joint at the high-pressure end is carved with an H, and the pressure joint at the low-pressure end is carved with an L.
Preferably, the tail end of the adapter is sleeved with a wire fixing sleeve, the wire penetrates through the wire fixing sleeve and then is connected with the circuit board, and the wire is a glass sintering lead.
Preferably, one end of the pressure connector is in a conical shape, the other end of the pressure connector is provided with a clamping step, a clamping groove is formed in the measuring end of the base, and the clamping step is matched with the clamping groove and then is subjected to laser welding.
Preferably, the connecting end of the adapter is provided with an inserting step, and the inserting step is inserted into the open hole at the upper end of the base and then is welded by laser.
Preferably, the depth of the welding seam on the measuring end and the upper end of the base is 1-2 mm.
Preferably, highland barley paper is arranged between the circuit board and the groove.
Compared with the prior art, the utility model has the following technical effects:
according to the utility model, the pressure connector, the adapter and the base are welded to reliably seal the pressure connector, so that liquid leakage is avoided, and the sealing ring is not arranged, so that the situation that corrosive substances damage the sealing ring to further cause functional failure of the differential pressure type sensor can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a cross-sectional view of an all welded differential pressure sensor of the present invention;
FIG. 2 is a first schematic structural diagram of an all-welded differential pressure sensor according to the present invention;
FIG. 3 is a schematic structural diagram of an all-welded differential pressure sensor according to the present invention;
wherein: 100-all-welded differential pressure type sensor, 1-pressure connector, 2-pressure ring, 3-semiconductor pressure sensitive chip, 4-base, 5-adapter, 6-highland barley paper, 7-circuit board, 8-wire fixing sleeve, 9-connector and 10-wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The utility model aims to provide an all-welded differential pressure type sensor, which solves the problems in the prior art, ensures reliable sealing among a pressure joint, an adapter and a base and prolongs the service life.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3: this embodiment provides an all-welded differential pressure type sensor 100, including pressure connector 1, adapter 5, the core subassembly, circuit board 7 and base 4, weld a pressure connector 1 on the measuring terminal of base 4 both sides respectively, pressure connector 1 is used for inserting pressure medium, the core subassembly sets up on base 4, the core subassembly is used for detecting the pressure variation of the medium of two measuring terminal intercommunications, the upper end welding of base 4 has adapter 5, circuit board 7 sets up in the recess of base 4 top, the core subassembly passes through the wire (gold wire glass sintering lead) with circuit board 7 and is connected, circuit board 7 passes through wire 10 and is connected with a connector 9. The core body assembly comprises a semiconductor pressure-sensitive chip 3, silicon oil and an isolation diaphragm, the isolation diaphragm is welded on the measuring ends of two sides of the base 4 through a pressure ring 2, a silicon oil cavity is formed between the isolation diaphragm and the measuring ends, the two silicon oil cavities are communicated through a channel inside the base 4, one end of the channel is provided with a groove, the silicon oil cavity is filled with the silicon oil, and the semiconductor pressure-sensitive chip 3 is arranged in the groove.
The upper end of the base 4 is welded with the adapter 5, the circuit board 7 is fixed in the groove of the base 4, and the highland barley paper 6 is arranged between the circuit board 7 and the groove for insulation. The tail end of the adapter 5 is sleeved with a wire fixing sleeve 8, a wire 10 penetrates through the wire fixing sleeve 8 and then is connected with the circuit board 7, the wire 10 is used for power supply and data transmission, and the circuit board 7 can process and compensate signals of the sensor.
The measuring ends at two sides of the base 4 are respectively a high-pressure end and a low-pressure end, the pressure joint 1 at the high-pressure end is carved with an H, the pressure joint 1 at the low-pressure end is carved with an L, and the measuring medium can be conveniently connected and identified. One end of the pressure connector 1 is in a conical shape, the other end of the pressure connector is provided with a clamping step, a clamping groove is formed in the measuring end of the base 4, and the clamping step is matched with the clamping groove and then is subjected to laser welding to form secondary sealing. The connecting end of the adapter 5 is provided with an inserting step which is inserted into the open hole at the upper end of the base 4 and then is welded by laser. The depth of the welding seam on the measuring end and the upper end of the base 4 is 1-2mm, the connection strength and the sealing reliability are guaranteed, and liquid seepage is avoided.
Adopt welded sealed mode in this embodiment, effectively avoid the weeping, applicable in acid, alkaline or to the sealing washer have the corrosivity environment in, because do not set up the sealing washer, can avoid having corrosive substance to the destruction of sealing washer and the functional failure who leads to differential pressure formula sensor.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (7)
1. An all-welded differential pressure sensor is characterized in that: the pressure connector is welded on the measuring ends on two sides of the base respectively, the core body assembly is arranged on the base and used for detecting pressure change of a medium communicated with the two measuring ends, the adapter is welded on the upper end of the base, the circuit board is arranged in a groove above the base, the core body assembly is connected with the circuit board through a lead, and the circuit board is connected with a connector through a lead; one end of the pressure connector is in a conical shape, the other end of the pressure connector is provided with a clamping step, a clamping groove is formed in the measuring end of the base, and the clamping step is matched with the clamping groove and then is subjected to laser welding.
2. An all-welded differential pressure sensor as claimed in claim 1, wherein: the core body subassembly includes semiconductor pressure sensitive chip, silicon oil and barrier film piece, barrier film piece pass through the clamping ring weld in on the measuring end of base both sides, the barrier film with form the silicon oil pocket between the measuring end, two the silicon oil pocket passes through the inside passageway intercommunication of base, the one end of passageway sets up a recess, the silicon oil intracavity is full of silicon oil, semiconductor pressure sensitive chip set up in the recess.
3. An all-welded differential pressure sensor as claimed in claim 1, wherein: the measuring ends at two sides of the base are respectively a high-pressure end and a low-pressure end, an H is carved on a pressure joint of the high-pressure end, and an L is carved on a pressure joint of the low-pressure end.
4. An all-welded differential pressure sensor as claimed in claim 1, wherein: the tail end of the adapter is sleeved with a wire fixing sleeve, the wire penetrates through the wire fixing sleeve and then is connected with the circuit board, and the wire is a glass sintering lead.
5. An all-welded differential pressure sensor as claimed in claim 1, wherein: and the connecting end of the adapter is provided with an inserting step, and the inserting step is inserted into the open hole at the upper end of the base and then is welded by laser.
6. An all-welded differential pressure sensor as claimed in claim 1, wherein: the depth of the welding seam on the measuring end and the upper end of the base is 1-2 mm.
7. An all-welded differential pressure sensor as claimed in claim 1, wherein: and highland barley paper is arranged between the circuit board and the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122626855.3U CN216483665U (en) | 2021-10-29 | 2021-10-29 | All-welded differential pressure type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122626855.3U CN216483665U (en) | 2021-10-29 | 2021-10-29 | All-welded differential pressure type sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216483665U true CN216483665U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122626855.3U Active CN216483665U (en) | 2021-10-29 | 2021-10-29 | All-welded differential pressure type sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216483665U (en) |
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2021
- 2021-10-29 CN CN202122626855.3U patent/CN216483665U/en active Active
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