Guide pipe applied to sensor pipe base welding process

Abstract

The utility model discloses a conduit applied to a sensor tube socket welding process, which relates to the technical field of sensors and comprises a tube socket base body, a differential pressure measuring chip and insulating filling glass. The inner side of the first conveying channel and the inner side of the second conveying channel are each provided with a stepped guide pipe in a welded mode. An original guide pipe structure is changed, a step type guide pipe is adopted, the angle between a laser welding head and the step type guide pipe is adjusted, it is ensured that a welding seam is perpendicular to laser, welding accuracy and consistency are improved, the step type guide pipe vertically falls into a pipe base body conveying channel, and then vertical welding is conducted at a step gap. Therefore, mutual shielding of the lead conduits during welding is avoided, welding integrity is guaranteed, and welding parameters can be adjusted according to requirements of customers on pressure to improve requirements of the customers on different conduit pressures.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field, concretely is a kind of catheter applied to sensor pipe base welding process. BACKGROUND

[0002] In the electrical, instrument industry, etc., often require to control the pressure difference of container, equipment, at this time, often use differential pressure sensor, wherein the catheter in sensor, currently commonly used brazing process or glass packaging process, wherein brazing leads to the surface of welded piece and welding piece needs to be pretreated;Brazing strength is relatively low, suitable for low pressure low sealing product;Glass welding, due to the characteristics of glass material, it is more fragile, easy to crack;The connection strength between glass and metal is low, if high pressure product needs to be resisted, glass embryo needs to have larger contact surface with product base and catheter to increase tension since differential pressure sensor product is distributed with multiple leads and catheter.

[0003] Based on the deficiencies of brazing process and glass packaging process, therefore we propose a kind of catheter applied to sensor pipe base welding process, to solve the above problems, and the catheter structure is optimized, to solve the shielding between lead and catheter in welding process, ensure the connection reliability and sealing property of product. SUMMARY

[0004] The utility model provides a kind of catheter applied to sensor pipe base welding process, with the advantages of solving the shielding between lead and catheter in welding process, ensure the connection reliability and sealing property of product, to solve the poor sealing effect of traditional catheter welding, other wire influence welding problem.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of catheter applied to sensor pipe base welding process, including pipe base body, differential pressure measurement chip, insulating filling glass, the inside of pipe base body is equipped with conveying passage one and conveying passage two, the inside of conveying passage one and conveying passage two is all used with stepped catheter welded, the inside of pipe base body is provided with the guide side hole being perpendicular to conveying passage one communication, the differential pressure measurement chip is arranged in the inside of conveying passage two, the middle part of pipe base body is equipped with ground wire hole, the inside of ground wire hole is sintered with ground wire by insulating filling glass, the inside of pipe base body is provided with five groups of lead hole, lead hole is all penetrated and is provided with lead;

[0006] One end of the stepped catheter is provided with welded step seat, the bottom of welded step seat is equipped with guide hole, the guide hole is communicated with conveying passage one and conveying passage two.

[0007] As a preferred embodiment of this utility model, the diameter of the welding step seat is larger than the diameter of the stepped conduit, the stepped conduit is connected to the guide hole, and the dimensions of the welding step seat are adapted to those of the first and second conveying passages.

[0008] As a preferred embodiment of this utility model, the insulating filling glass is connected to the tube base by sintering the insulating glass.

[0009] Compared with the prior art, this utility model provides a conduit for use in the welding process of sensor tube seats, which has the following beneficial effects:

[0010] This conduit, used in the sensor tube socket welding process, modifies the original conduit structure by adopting a stepped conduit. By adjusting the angle between the laser welding head and the stepped conduit, the weld seam is ensured to be perpendicular to the laser, improving the accuracy and consistency of the welding. The stepped conduit is vertically lowered into the tube socket base delivery passage, and then vertical welding is performed at the step gap. This avoids mutual obstruction of the various lead conduits during welding, ensuring the integrity of the weld. Welding parameters can also be adjusted according to customer pressure requirements to meet the needs of customers for different conduit pressures. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of a conduit used in the welding process of sensor tube seats according to the present invention;

[0012] Figure 2 This is a schematic diagram of the base structure of the tube seat of this utility model;

[0013] Figure 3 This is a schematic diagram of the stepped conduit structure in this utility model;

[0014] Figure 4 This is a schematic cross-sectional view of the stepped conduit structure in this utility model;

[0015] Figure 5 This is a schematic cross-sectional view of the central tube base and stepped conduit structure of this utility model.

[0016] In the diagram: 1. Pipe base; 2. Delivery path one; 3. Grounding wire; 4. Lead wire; 5. Insulating filling glass; 6. Stepped conduit; 7. Delivery side hole; 8. Grounding wire hole; 9. Delivery path two; 10. Welded stepped seat; 11. Guide hole; 12. Differential pressure measurement chip. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-5 This utility model discloses a conduit used in the welding process of sensor tube base, including a tube base base 1, a differential pressure measuring chip 12, and an insulating filling glass 5. The tube base base 1 has a first transport passage 2 and a second transport passage 9 inside. The inner sides of the first transport passage 2 and the second transport passage 9 are both welded with stepped conduits 6. The tube base base 1 has a guide side hole 7 that is perpendicularly connected to the first transport passage 2 inside. The differential pressure measuring chip 12 is located inside the second transport passage 9. The tube base base 1 has a ground wire hole 8 in the middle. The inner side of the ground wire hole 8 is sintered with a ground wire 3 through the insulating filling glass 5. The tube base base 1 has five sets of lead wire holes inside. Each lead wire 4 is inserted through the lead wire hole.

[0019] One end of the stepped conduit 6 is provided with a welded step seat 10, and the bottom end of the welded step seat 10 is provided with a guide hole 11, which is connected to both the first conveying passage 2 and the second conveying passage 9.

[0020] Lead 4 is used to transmit the electrical signal measured by the differential pressure measuring chip 12 to the socket substrate 1, wherein the socket substrate 1 is made of metal.

[0021] Specifically, the diameter of the welded step seat 10 is larger than the diameter of the stepped conduit 6, the stepped conduit 6 is connected to the guide hole 11, and the welded step seat 10 is adapted to the size of the conveying passage 1 2 and the conveying passage 2 9.

[0022] In this embodiment, both the welding step seat 10 and the stepped conduit 6 are made of stainless steel. The number of stepped conduits 6 can be set in multiple groups according to actual needs. The medium that the stepped conduit 6 can transport can be oil, water, or gas. During welding, one end of the welding step seat 10 is vertically inserted into the inside of the first transport passage 2 and the second transport passage 9, respectively. Then, the connection between the welding step seat 10 and the first transport passage 2 and the second transport passage 9 is welded by laser welding, thereby achieving a seal between the welding step seat 10 and the first transport passage 2 and the second transport passage 9. Argon arc welding or electron beam welding can also be used.

[0023] During welding, the laser beam can be set perpendicular to the weld seam, and the laser's trajectory can be manipulated to make it move in a circle along the central axis of the stepped conduit 6 for welding. This welding process can effectively avoid interference from other wires during the welding process.

[0024] Specifically, the insulating filler glass 5 is connected to the tube base substrate 1 by sintering insulating glass.

[0025] In this embodiment, the insulating filled glass 5 is used to connect and fix the grounding wire 3 and the lead wire 4, while ensuring the airtightness of the connection.

[0026] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A guide tube applied to a sensor tube base welding process, comprising a tube base body (1), a differential pressure measurement chip (12), and an insulating filled glass (5), characterized in that: The inside of the pipe seat base body (1) is provided with a conveying passage one (2) and a conveying passage two (9), the inside of the conveying passage one (2) and the conveying passage two (9) are welded with a stepped guide pipe (6), the inside of the pipe seat base body (1) is provided with a guide conveying side hole (7) which is vertically communicated with the conveying passage one (2), the differential pressure measurement chip (12) is arranged in the inside of the conveying passage two (9), the middle part of the pipe seat base body (1) is provided with a ground wire hole (8), the inside of the ground wire hole (8) is sintered with a grounding wire (3) through insulating filling glass (5), the inside of the pipe seat base body (1) is provided with five groups of lead holes, the lead holes are all provided with lead wires (4) which are penetrated. One end of the stepped guide pipe (6) is provided with a welding stepped seat (10), the bottom end of the welding stepped seat (10) is provided with a guide hole (11), the guide hole (11) is communicated with the conveying passage one (2) and the conveying passage two (9).

2. A guide tube for use in a sensor cartridge welding process according to claim 1, characterized in that: The diameter of the welding stepped seat (10) is larger than the diameter of the stepped guide pipe (6), the stepped guide pipe (6) is communicated with the guide hole (11), the welding stepped seat (10) is matched with the size of the conveying passage one (2) and the conveying passage two (9).

3. A guide tube for use in a sensor tube base welding process according to claim 1, characterized in that: The insulating filling glass (5) is connected with the pipe seat base body (1) by insulating glass sintering.

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