Anti-electromagnetic interference industrial pressure sensor

Abstract

The utility model discloses an anti-electromagnetic interference industrial pressure sensor, which belongs to the technical field of pressure sensors, and comprises a mounting head, a threaded connector, a top cover, a signal receiver, a shell, a conversion plate, a thimble device and a protection device, the threaded connector is arranged on the lower surface of the shell, the mounting head is arranged on the lower surface of the threaded connector, and the signal receiver is arranged on the top cover. The top cover is arranged on the upper surface of the shell, the signal receiver is arranged in the top cover, the conversion plate is arranged in the shell, the ejector pin device is arranged in the shell and below the conversion plate, and the protection device is arranged on the surface of the shell and comprises a protection cover and an abutting ring. The abutting ring is fixedly connected to the upper surface of the protective cover, the protective cover is connected to the outer surface of the shell in an attached mode, and a protruding block is fixedly connected to the outer surface of the abutting ring. According to the scheme, external electromagnetism is blocked outside the shell through the protective cover, accurate detection of equipment is facilitated, and the practicability of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure sensor technical field, especially related to an industrial pressure sensor of anti-electromagnetic interference. BACKGROUND

[0002] Industrial pressure sensor is widely used in industrial automation control system, it can convert pressure signal into electric signal, in order to measure and control pressure, however, in actual industrial environment, there are various electromagnetic interference sources, such as motor, frequency converter, power line etc., these electromagnetic interferences can produce adverse effects on signal transmission and measurement accuracy of pressure sensor, lead to inaccurate measurement data, even make sensor unable to work normally, the shielding measures of some existing often effect is not good, or complex structure, is not conducive to installation and maintenance, therefore use an industrial pressure sensor of anti-electromagnetic interference for effectively blocking external electromagnetic interference. SUMMARY

[0003] The utility model discloses to solve the problems of the shielding measures of the prior art pressure sensor often effect is not good, or complex structure, is not conducive to installation and maintenance.

[0004] The utility model discloses a following scheme realizes:

[0005] An industrial pressure sensor of anti-electromagnetic interference, including installation head, threaded connector, top cover, signal receiver, shell, conversion board, thimble ware and protection device, threaded connector sets up at the lower surface of shell, installation head sets up at the lower surface of threaded connector, top cover sets up at the upper surface of shell, signal receiver sets up inside top cover, conversion board sets up inside shell, thimble ware sets up inside conversion board below shell, protection device sets up at the surface of shell, the protection device includes protection cover and abutment ring, the abutment ring fixedly connected in the upper surface of protection cover, the protection cover is connected in the outer surface of shell, the outer surface of abutment ring is fixedly connected with lug, the surface of lug is equipped with positioning hole, the inside positioning hole is inserted and is connected with positioning plate.

[0006] Based on the structure of the above-mentioned industrial pressure sensor of anti-electromagnetic interference, the upper surface of the top cover is fixedly connected with a sliding rod, and a sliding groove is formed in the surface of the top cover.

[0007] Based on the structure of the above-mentioned industrial pressure sensor of anti-electromagnetic interference, one end of the sliding rod away from the positioning plate is fixedly connected with a fixed block, and a first spring is sleeved on the surface of the sliding rod.

[0008] Based on the above anti electromagnetic interference industrial pressure sensor structure, one end of the first spring is fixedly connected to the upper surface of the positioning plate, and the other end of the first spring away from the positioning plate is fixedly connected to the lower surface of the fixed block.

[0009] Based on the above anti electromagnetic interference industrial pressure sensor structure, the lower end surface of the protective cover is provided with an auxiliary assembly for connecting the protective cover and the shell.

[0010] Based on the above anti electromagnetic interference industrial pressure sensor structure, the auxiliary assembly comprises a mounting ring and a slot, the slot is opened in the outer surface of the shell, the mounting ring is fixedly connected to the outer surface of the protective cover, a pull hole is opened in the inside of the mounting ring, a plug plate is slidably connected in the inside of the pull hole, the lower end of the plug plate is inserted into the inside of the slot, and a limiting ring is fixedly connected to the surface of the plug plate.

[0011] Based on the above anti electromagnetic interference industrial pressure sensor structure, the limiting ring is slidably connected in the inside of the pull hole, and a pull ring is fixedly connected to the upper end of the plug plate.

[0012] Based on the above anti electromagnetic interference industrial pressure sensor structure, a second spring is fixedly connected to the upper surface of the limiting ring, and one end of the second spring away from the limiting ring is fixedly connected to the inside of the pull hole.

[0013] Based on the above anti electromagnetic interference industrial pressure sensor structure, the top cover is a circular metal plate made of copper alloy material with electromagnetic shielding performance, and the inside of the top cover is provided with a signal receiving antenna and a filter circuit.

[0014] Based on the above anti electromagnetic interference industrial pressure sensor structure, the shell is a sealed cavity structure, and a double-layer metal shielding design is adopted, the inner layer is a permalloy with high magnetic permeability, the outer layer is an aluminum alloy with electric conductivity, and an insulating isolation layer is arranged between the two layers.

[0015] In summary, due to the adoption of the above technical scheme, the beneficial effects of the present application are:

[0016] 1) The protective device is arranged, which effectively protects the shell and protects the conversion plate inside the shell during conversion, reduces the influence of external electromagnetic interference on the conversion plate during use, and avoids interference when converting pressure into electrical signals, so that the device conversion is not affected and accurate detection is difficult.

[0017] 2. The utility model discloses a supplementary assembly is set up, effectively position protection cover, played the role of firm protection cover, reduced the present equipment when using, protection cover is easy to separate from the shell surface, cause the equipment to be difficult to firm protection cover's situation, this supplementary assembly realizes firm protection cover, improved the firmness of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the internal structure schematic diagram of the utility model;

[0019] Figure 2 It is the internal structure schematic diagram of the utility model;

[0020] Figure 3 It is Figure 2 The enlarged structure schematic diagram of A place in the middle;

[0021] Figure 4 It is Figure 2 The enlarged structure schematic diagram of B place in the middle;

[0022] Figure 5 It is Figure 2 The enlarged structure schematic diagram of C place in the middle;

[0023] Reference Signs: 1, mounting head, 2, threaded connection head, 3, top cover, 4, signal receiver, 5, shell, 6, conversion board, 7, thimble, 8, protection device, 81, protection cover, 82, abutment ring, 83, lug, 84, positioning hole, 85, positioning plate, 86, slide rod, 87, fixed block, 88, sliding slot, 89, first spring, 9, supplementary assembly, 91, slot, 92, pull hole, 93, plugboard, 94, limiting ring, 95, second spring, 96, pull ring, 97, mounting ring. DETAILED DESCRIPTION

[0024] All features disclosed in this specification, and / or all steps of any methods disclosed, can be combined in any combination, except combinations where at least some of the features and / or steps are mutually exclusive.

[0025] Any feature disclosed in this specification, unless stated otherwise, can be replaced by alternative features serving the same, equivalent or similar purpose.

[0026] In the description of the utility model, it is understood that the terms "first", "second" and the like are only used for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more features.

[0027] Embodiment 1

[0028] As Figures 1-5 indicated, the utility model provides a technical scheme:

[0029] An industrial pressure sensor of anti-electromagnetic interference, including installation head 1, threaded connector 2, top cap 3, signal receiver 4, shell 5, conversion board 6, thimble 7 and protection device 8, threaded connector 2 is fixedly connected in the lower surface of shell 5, installation head 1 is fixedly connected in the lower surface of threaded connector 2, top cap 3 is fixedly connected in the upper surface of shell 5, signal receiver 4 is installed in the inside of top cap 3, conversion board 6 is installed in the inside of shell 5, thimble 7 is installed in the inside conversion board 6 below of shell 5.

[0030] Installation head 1 adopts high-strength stainless steel material, is processed precisely, threaded connector 2 also adopts stainless steel material, and the surface is processed with high-precision thread, is closely connected with installation head 1 and shell 5 through thread, ensures that the connection is stable and sealed well, top cap 3 is circular metal plate, adopts copper alloy material with electromagnetic shielding performance, is equipped with signal receiving antenna and filter circuit in the inside, signal receiver 4 adopts high-sensitivity digital signal receiving module, has automatic gain control and anti-interference algorithm, can accurately capture weak electric signal, shell 5 is sealed cavity structure, adopts double-layer metal shielding design, the inner layer is high-permeability permalloy, the outer layer is aluminum alloy with conductivity, is equipped with insulating isolation layer between two layers, can effectively shield electromagnetic interference of different frequency bands, conversion board 6 integrates high-performance pressure-electric signal conversion chip and signal amplification circuit, adopts surface mounting technology, and the layout is compact and has strong anti-interference ability, thimble 7 is composed of high-strength ceramic thimble and elastic reset mechanism, can accurately transmit external pressure to conversion board 6.

[0031] The specific settings and effects of the protection device 8 and the auxiliary assembly 9 will be described below.

[0032] In this embodiment, the protection device 8 is fixedly arranged on the surface of the shell 5. The protection device 8 includes a protective cover 81 and a retainer ring 82. The retainer ring 82 is fixedly connected to the upper surface of the protective cover 81. The protective cover 81 is attached to the outer surface of the shell 5. The protective cover 81 adopts a double-layer metal mesh woven structure. The inner layer is a copper mesh, and the outer layer is a stainless steel mesh. The two layers of metal mesh are bonded by conductive glue, which can shield electromagnetic interference and has good mechanical strength. The retainer ring 82 is an annular metal structure made of the same material as the protective cover 81. It is fixed to the upper surface of the protective cover 81 by welding. It is used to tightly attach to the top cap 3 to enhance the protection effect. The outer surface of the retainer ring 82 is fixedly connected with a protrusion 83. The surface of the protrusion 83 is provided with a positioning hole 84. The positioning hole 84 is internally inserted and connected with a positioning plate 85.

[0033] Specifically, the upper surface of the top cover 3 is fixedly connected with a sliding rod 86, and the surface of the top cover 3 is provided with a sliding groove 88, and the positioning plate 85 is slidingly connected in the sliding groove 88.

[0034] In the embodiment, the positioning plate 85 is arranged to limit the protective cover 81. In a complex industrial electromagnetic environment, the traditional protective structure is prone to loosening due to vibration, external force and other factors, resulting in electromagnetic shielding failure. After the positioning plate 85 is inserted into the positioning hole 84 of the protruding block 83, the protective cover 81 is firmly fixed on the surface of the shell 5. Tests show that the limiting structure can still remain stable when subjected to a large external force. Compared with the protective structure without the positioning plate 85, the electromagnetic interference problem caused by loosening of the protective cover 81 is reduced, and the situation that the protective cover 81 easily separates from the surface of the shell 5 during use of the equipment is reduced.

[0035] Specifically, the end of the sliding rod 86 away from the positioning plate 85 is fixedly connected with a fixed block 87, and the surface of the sliding rod 86 is sleeved with a first spring 89.

[0036] Specifically, one end of the first spring 89 is fixedly connected to the upper surface of the positioning plate 85, and the end of the first spring 89 away from the positioning plate 85 is fixedly connected to the lower surface of the fixed block 87. The first spring 89 is arranged to facilitate the application of a reset spring force to the positioning plate 85.

[0037] In the embodiment, the surface of the protective cover 81 is fixedly provided with an auxiliary assembly 9, the auxiliary assembly 9 comprises a mounting ring 97 and a slot 91, the slot 91 is provided on the outer surface of the shell 5, and the mounting ring 97 is fixedly connected to the outer surface of the protective cover 81. The inside of the mounting ring 97 is provided with a pull hole 92, the pull hole 92 is slidingly connected with a plug plate 93, the lower end of the plug plate 93 is inserted into the slot 91, and the surface of the plug plate 93 is fixedly connected with a limiting ring 94.

[0038] In the embodiment, the plug plate 93 is arranged to stabilize the protective cover 81, thereby reducing the situation that one end of the protective cover 81 is easily raised during use of the equipment.

[0039] Specifically, the limiting ring 94 is slidingly connected in the pull hole 92, and the upper end of the plug plate 93 is fixedly connected with a pull ring 96.

[0040] Specifically, the upper surface of the limiting ring 94 is fixedly connected with a second spring 95, and the end of the second spring 95 away from the limiting ring 94 is fixedly connected in the pull hole 92. The second spring 95 is arranged to facilitate the application of a reset spring force to the plug plate 93.

[0041] Working principle: when the device is used, the installation head 1 of the device is connected with the device to be detected, and then when the detection flow flows, the pressure is applied to the ejector 7 in the installation head 1, and then the ejector 7 extrudes the conversion plate 6, the conversion plate 6 converts the pressure into an electronic signal and sends it out to be received by the signal receiver 4, and then the signal receiver 4 analyzes and converts the received signal into the receiving end for detection. When the device is installed, the protective cover 81 is installed, the positioning plate 85 is moved on the surface of the slide rod 86, the pressure is applied to the first spring 89, the protective cover 81 is connected with the surface of the shell 5, and then the ring 82 is abutted on the lower surface of the top cover 3. The positioning plate 85 is inserted and connected with the positioning hole 84 in the protective cover 81, the positioning plate 85 is limited by the first spring 89, the protective device 8 is arranged, the shell 5 is effectively protected, the conversion process of the conversion plate 6 in the shell 5 is protected, the existing conversion plate 6 is easily affected by external electromagnetic interference, the pressure is converted into an electrical signal, interference occurs, the device conversion is affected, and accurate detection is difficult. The protective device 8 blocks the external electromagnetic field outside the shell 5, facilitates accurate detection of the device, and improves the practicability of the device.

[0042] When the device is installed, the movable pull ring 96 drives the plug plate 93 to move the limiting ring 94, the limiting ring 94 drives the second spring 95 to compress and generate elastic force, and then when the protective cover 81 is attached to the surface of the shell 5, the pull ring 96 is released, and then the second spring 95 is reset to drive the limiting ring 94 and the plug plate 93 to combine with the plug slot 91 inside the protective cover 81 to stabilize the protective cover 81. By arranging the auxiliary assembly 9, the protective cover 81 is effectively limited, the protective cover 81 is stabilized, the existing device is used, the protective cover 81 is easily separated from the surface of the shell 5, and the device is difficult to stabilize the protective cover 81. The auxiliary assembly 9 stabilizes the protective cover 81 and improves the stability of the device.

[0043] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An industrial pressure sensor resistant to electromagnetic interference, characterized in that, The utility model relates to a signal receiving device, including installation head (1), threaded connector (2), top cap (3), signal receiver (4), shell (5), conversion board (6), thimble (7) and protection device (8), threaded connector (2) sets up at the lower surface of shell (5), installation head (1) sets up at the lower surface of threaded connector (2), top cap (3) sets up at the upper surface of shell (5), signal receiver (4) sets up at the inside of top cap (3), conversion board (6) sets up at the inside of shell (5), thimble (7) sets up at the inside conversion board (6) below of shell (5), protection device (8) sets up at the surface of shell (5), protection device (8) includes protective cover (81) and abutment ring (82), abutment ring (82) fixedly connected in the upper surface of protective cover (81), protective cover (81) is connected in the outer surface of shell (5) with sticking, the outer surface of abutment ring (82) is fixedly connected with lug (83), the surface of lug (83) is equipped with positioning hole (84), the inside positioning hole (84) is inserted and is connected with the positioning plate (85).

2. The industrial pressure sensor of claim 1, wherein: The upper surface of the top cap (3) is fixedly connected with a slide rod (86), and the surface of the top cap (3) is provided with a sliding groove (88), and the positioning plate (85) is slidingly connected in the sliding groove (88).

3. The industrial pressure sensor of claim 2, wherein: The end of the slide rod (86) away from the positioning plate (85) is fixedly connected with a fixed block (87), and the surface of the slide rod (86) is sleeved with a first spring (89).

4. The industrial pressure sensor of claim 3, wherein: One end of the first spring (89) is fixedly connected to the upper surface of the positioning plate (85), and the other end of the first spring (89) away from the positioning plate (85) is fixedly connected to the lower surface of the fixed block (87).

5. The industrial pressure sensor of claim 4, wherein: The lower end surface of the protective cover (81) is provided with an auxiliary assembly (9) for connecting the protective cover (81) and the shell (5).

6. The industrial pressure sensor of claim 5, wherein: The auxiliary assembly (9) includes a mounting ring (97) and a slot (91), the slot (91) is provided on the outer surface of the shell (5), the mounting ring (97) is fixedly connected to the outer surface of the protective cover (81), the mounting ring (97) is provided with a pull hole (92) in the inside, the pull hole (92) is slidingly connected with a plug plate (93) in the inside, the lower end of the plug plate (93) is inserted into the slot (91), and the surface of the plug plate (93) is fixedly connected with a limiting ring (94).

7. The industrial pressure sensor of claim 6, wherein: The limiting ring (94) is slidingly connected in the pull hole (92), and the upper end of the plug plate (93) is fixedly connected with a pull ring (96).

8. The industrial pressure sensor of claim 7, wherein: The upper surface of the limiting ring (94) is fixedly connected with a second spring (95), and the other end of the second spring (95) away from the limiting ring (94) is fixedly connected in the inside of the pull hole (92).

9. The industrial pressure sensor of claim 8, wherein: The top cap (3) is a circular metal plate, which is made of copper alloy material with electromagnetic shielding performance, and the inside of the top cap (3) is provided with a signal receiving antenna and a filter circuit.

10. The industrial pressure sensor of claim 9, wherein: The shell (5) is a sealed cavity structure, adopts a double-layer metal shielding design, the inner layer is a high-permeability permalloy, the outer layer is an aluminum alloy with electric conductivity, and an insulating isolation layer is arranged between the two layers.

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