High-voltage sensor for severe environment

Abstract

The utility model discloses a group of high pressure sensors used in severe environment, each high pressure sensor has a multi-stage sealing structure and is suitable for direct installation and welding installation, the multi-stage sealing structure comprises a welding sealing housing and at least two sealing grooves arranged on the housing, and sealing rings are arranged in the sealing grooves; the welding sealing shell comprises a front end welding face, a middle welding face and a rear end welding face which are suitable for welding sizes. According to the utility model, a multi-stage sealing structure is formed by welding the sealing shell and the plurality of sealing grooves and sealing rings which are arranged on the shell, so that the gas tightness is good, the durability is good, and the service life of the sensor is prolonged; through the arrangement of the front end welding surface, the middle welding surface and the rear end welding surface on the welding sealing shell, the sensor can be directly installed and also can be installed in a welding mode, the welding position is suitable for the welding size, large welding stress caused by too large welding stress is avoided, welding cracks are not prone to being generated, coaxiality can be kept after welding, and the reliability of the sensor is improved. And meanwhile, the application environment range is also expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a high-voltage sensor for harsh environments. Background Art

[0002] A high-voltage sensor is a device that converts measured electrical parameters into direct current, direct voltage and isolates and outputs analog signals or digital signals. The high-voltage sensor is a commonly used pressure sensor in industrial practice, and is widely used in various industrial automation environments, water conservancy and hydropower projects, transportation and construction equipment, production automation systems, aerospace technology, ship technology, large hydraulic equipment, conveying pipelines and other areas.

[0003] The existing high-voltage sensors are often installed by welding, but the welding thickness is too large, resulting in large welding stress, easy cracking, and low sealing performance, which cannot meet the use in harsh environments. Summary of the Utility Model

[0004] In view of at least one of the above problems, the utility model provides a group of high-voltage sensors for harsh environments.

[0005] To achieve the above object, the utility model is implemented by the following technical solutions:

[0006] A high-voltage sensor for harsh environments, the high-voltage sensor has a multi-stage sealing structure and is suitable for direct installation and welding installation. The multi-stage sealing structure includes a welded sealing housing and at least two sealing grooves provided on the housing, and sealing rings are provided in the sealing grooves; the welded sealing housing includes a front welding surface, a middle welding surface, and a rear welding surface with suitable welding dimensions.

[0007] As a preference of the above solution, a sealing port and multiple ports such as excitation negative, signal output positive, excitation positive, and signal output negative are provided at the rear end of the welded sealing housing, and a non-through threaded interface is provided at the front end.

[0008] As a preference of the above solution, fillets are provided at the end face of the welded sealing housing and the corners of the sealing grooves, and chamfers are provided at the middle welding sealing surface and the end face of the threaded interface.

[0009] As a preference of the above solution, the diameter of the middle welding surface is smaller than the outer diameter of the housing.

[0010] As a preference of the above solution, a retaining ring is provided on one side of the sealing ring.

[0011] As a preference of the above solution, the sealing grooves are provided on the front and rear sides or the same side of the middle welding surface.

[0012] As a preferred embodiment of the above scheme, a transition section is provided at the front end of the welding sealing shell, a sealing groove and a sealing ring are provided on the transition section, the transition section cooperates with the transition ring, and the transition ring can avoid welding cracks.

[0013] As a preferred embodiment of the above solution, one or two sensor cores are encapsulated inside the welded sealed housing.

[0014] As a preferred embodiment of the above scheme, when only one sensor core is encapsulated inside, a sealing port and a group of excitation negative, signal output positive, excitation positive, and signal output negative port leads are provided at the rear end of the welded sealed shell; when a second sensor core is encapsulated inside, a second group of excitation negative, signal output positive, excitation positive, and signal output negative port leads are provided at the rear end of the welded sealed shell.

[0015] As a preferred embodiment of the above solution, a stress relief groove is provided on the welding sealing shell.

[0016] Due to the above structure, the beneficial effects of the utility model are:

[0017] 1. A multi-stage sealing structure is formed by welding the sealing housing and at least two sealing grooves and sealing rings arranged on the housing, which has good air tightness and durability, and prolongs the service life of the sensor;

[0018] 2. Through the setting of the front welding surface, the middle welding surface and the rear welding surface on the welding sealing shell, the sensor can be directly installed or welded, and the welding part is suitable for the welding size, which will not cause large welding stress due to excessive size, is not easy to crack, and can maintain coaxiality after welding, while also expanding the scope of applicable environment;

[0019] 3. By opening a non-through threaded interface at the end of the welded sealing shell, it is more convenient to install and disassemble the filter to prevent mud and sand, prevent water hammer effect, and mitigate high-pressure shock waves during perforating operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the port structure of the first embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0024] Figure 4Schematic diagram of the third embodiment of the present utility model;

[0025] Figure 5 Schematic diagram of the fourth embodiment of the present utility model;

[0026] Figure 6 Schematic diagram of the port structure of the fourth embodiment of the present utility model;

[0027] Figure 7 Schematic diagram of the direct installation of the sensor of the present utility model;

[0028] Figure 8 、 Figure 9 Schematic diagram of the front-end welding installation of the sensor of the present utility model. The angle values in the figure represent the welding groove;

[0029] Figure 10 Schematic diagram of the middle-part welding installation of the sensor of the present utility model;

[0030] Figure 11 、 Figure 12 Schematic diagram of the back-end welding installation of the sensor of the present utility model;

[0031] Figure 13 Schematic diagram of the cooperative installation of the sensor and the transition ring of the present utility model. Detailed implementation manners

[0032] Next, in conjunction with the accompanying drawings of the present utility model, the technical solutions of the present utility model will be clearly and completely described. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] As Figure 1 、 Figure 2 shown, this embodiment provides a high-pressure sensor for harsh environments. The high-pressure sensor has a multi-stage sealing structure and is suitable for direct installation and welding installation. Among them, the multi-stage sealing structure includes a welded sealing housing and at least two sealing grooves provided on the housing. A sealing ring is provided in the sealing groove to form a multi-stage sealing structure of welded sealing + sealing ring sealing.

[0034] The welded sealing housing includes a front-end welding surface 1, a middle-part welding surface 2, and a back-end welding surface 3 with suitable welding dimensions. The length of the welding surface is suitable for welding and will not cause excessive welding stress and cracking due to being too large. Among them, the diameter where the middle-part welding surface 2 is located is smaller than the outer diameter of the housing, forming a middle-part welding groove structure, so that the structure welded to the sensor can be coaxial with the sensor after welding, and at the same time, no welding convex surface will be generated, thereby improving the welding sealing performance. The back-end welding surface 3 provides a back-end welding usage method, which is suitable for usage environments with limited volume and expands the applicable range.

[0035] In this embodiment, a sensing core is encapsulated in the welded and sealed housing. At the corresponding position at the rear end of the welded and sealed housing, there are a plurality of ports such as a seal port 4, the negative excitation 11 of the chip, the positive signal output 12, the positive excitation 13, and the negative signal output 14; at the front end of the welded and sealed housing, there is a non-through threaded interface 5, which is more conducive to the convenient installation and disassembly of the filter compared with the optical hole in the prior art, so as to prevent sediment, water hammer, and high pressure during perforation operations; on one side of the sealing ring, there is a retaining ring 6, which can make the assembly allowable tolerance larger. Rounding corners 7 are provided at the end face and the corner of the sealing groove of the welded and sealed housing, and chamfers 8 are provided at the middle welded sealing surface and the end face of the threaded interface 5.

[0036] In this embodiment, there are two housing sealing grooves (sealing groove and sealing ring I 9, sealing groove and sealing ring II 10), which are respectively arranged on the front and rear sides of the middle welding surface 2.

[0037] Embodiment Two:

[0038] As Figure 3 shown, it is basically the same as Embodiment One, the difference is:

[0039] There are two sealing grooves (sealing groove and sealing ring I 9, sealing groove and sealing ring II 10), and they are arranged on the same side (rear side) of the middle welding surface 2, forming a rear double-sealing structure.

[0040] Embodiment Three:

[0041] As Figure 4 shown, it is basically the same as Embodiment One, the difference is:

[0042] A transition section 21 is provided at the front end of the welded and sealed housing. The transition section 21 can cooperate with the transition ring 300 (as Figure 13 shown). Adding the transition ring 300 can avoid welding cracking. A sealing groove and a sealing ring (i.e., sealing groove and sealing ring III 20) are provided on the transition section 21. When the materials of the sensor 100 housing and the sensor seat 200 housing are different, direct welding of the two is likely to crack. 316L is a commonly used sensor housing material, and 17-4ph is a commonly used sensor seat material. By adding a transition ring 300 made of inconel718 high-nickel-based material, it can ensure that the welding does not crack and the seal is complete.

[0043] Embodiment Four:

[0044] As Figure 5 、 Figure 6 shown, it is basically the same as Embodiment One, the difference is:

[0045] Two sensing cores are encapsulated in the welded and sealed housing, one of which is used as a backup. At the corresponding positions at the rear end of the welded and sealed housing, there are ports such as the negative excitation 31 of core one, the positive signal output 32 of core one, the positive excitation 33 of core one, the negative signal output 34 of core one, the negative excitation 41 of core two, the positive signal output 42 of core two, the positive excitation 43 of core two, and the negative signal output 44 of core two. Moreover, a stress relief groove 22 is provided on the welded and sealed housing.

[0046] The sensor of the present application forms a multi-stage sealing structure through the welded and sealed housing and at least two sealing grooves and sealing rings provided on the housing, with good airtightness and durability, and extends the service life of the sensor; through the settings of the front welding surface, middle welding surface, and rear welding surface on the welded and sealed housing, the sensor 100 can be directly installed with the sensor seat 200 (as Figure 7 shown) or welded and installed (as Figures 8 to 13 shown), and the welding joint is suitable for the welding size, will not cause excessive welding stress due to being too large, the welding part is not prone to cracks, and can maintain coaxiality after welding, and at the same time also expands the applicable environmental range.

[0047] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. High-pressure sensor for harsh environments, characterized in that: The high-pressure sensor has a multi-stage sealing structure and is suitable for direct installation and welded installation. The multi-stage sealing structure includes a welded sealing housing and at least two sealing grooves provided on the housing, and sealing rings are provided in the sealing grooves; the welded sealing housing includes a front welding surface, a middle welding surface, and a rear welding surface with suitable welding dimensions; one or two sensing cores are encapsulated in the structure.

2. The high-pressure sensor for harsh environments according to claim 1, wherein: A non-through threaded interface is provided at the front end of the welded sealing housing.

3. The high-pressure sensor for harsh environments according to claim 1, wherein: Round corners are provided at the end face of the welded sealing housing and at the corners of the sealing grooves, and chamfers are provided at the middle welding sealing surface and the end face of the threaded interface.

4. The high-pressure sensor for harsh environments according to claim 1, characterized in that: The diameter where the middle welding surface is located is smaller than the outer diameter of the housing.

5. The high-pressure sensor for harsh environments according to claim 1, wherein: A retaining ring is provided on one side of the sealing ring.

6. The high-pressure sensor for harsh environments according to claim 1, characterized in that: The sealing grooves are provided on the front and rear sides or the same side of the middle welding surface.

7. The high-pressure sensor for harsh environments according to claim 1, wherein: A transition section is provided at the front end of the welded sealing housing. Sealing grooves and sealing rings are provided on the transition section. The transition section cooperates with a transition ring, and the transition ring can prevent welding cracking.

8. The high-voltage sensor for harsh environments according to claim 1, characterized in that: One or two sensing cores are encapsulated inside the welded sealing housing.

9. The high-pressure sensor for harsh environments according to claim 8, characterized in that: When only one sensing core is encapsulated inside, a sealing port and a set of excitation negative, signal output positive, excitation positive, and signal output negative port leads are provided at the rear end of the welded sealing housing; when a second sensing core is encapsulated, a second set of excitation negative, signal output positive, excitation positive, and signal output negative port leads are provided at the rear end of the welded sealing housing.

10. The high-pressure sensor for harsh environments according to claim 1, characterized in that: A stress relief groove is provided on the welded sealing housing.

Images