CN204165676U - A kind of insulation lightning protection transmitter - Google Patents
A kind of insulation lightning protection transmitter Download PDFInfo
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- CN204165676U CN204165676U CN201420686476.0U CN201420686476U CN204165676U CN 204165676 U CN204165676 U CN 204165676U CN 201420686476 U CN201420686476 U CN 201420686476U CN 204165676 U CN204165676 U CN 204165676U
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Abstract
The utility model relates to transmitter technical field, discloses a kind of insulation lightning protection transmitter.It comprises housing, be arranged on the entrance pressure joint in housing cavity, circuit board placed cavity, the afterbody of entrance pressure joint is provided with diffuse si oiling core body, change-over circuit plate is provided with in circuit board placed cavity, triple lightning protection circuit plate, the end of circuit board placed cavity is connected with cable, the end of circuit board placed cavity and cable gland hot-melt adhesive paste, housing is made up of copolymerization acrylic material, the front end of entrance pressure joint is metal bolts, the afterbody of entrance pressure joint is connected with circuit board placed cavity by pressure ring, housing and metal bolts, circuit board placed cavity is welded together, silica gel is marked with in the inner chamber of housing.The utility model structure is simple, and it is firm to connect between each ingredient, has extremely strong insulating property, effectively can block the high electromagnetic pulse that thunder and lightning produces, resistance to overvoltage and overcurrent capability by force, improve the reliability of product, can be applicable to the Measurement & Control of each field liquid level.
Description
Technical field
The utility model relates to transmitter technical field, specifically a kind of insulation lightning protection transmitter.
Background technology
Lightning protection transmitter is that pressure medium acts on the diaphragm of sensor, diaphragm is made to produce the micro-displacement be directly proportional to pressure medium, the resistance of sensor is changed, with this change of electronics wireline inspection, and change output one and correspond to the standard signal of this pressure, to meet the requirements such as the transmission of information, process, storage, display, record and control.It is made up of sensitive element and conversion element and process web member three part.Current lightning protection transmitter adopts diffuse si oiling core body mostly, and supporting with zero point, full scale compensation, temperature-compensation circuit, change-over circuit, lightning protection circuit, convert the standard electric such as 4 ~ 20mA, 0.5 ~ 4.5VDC signal to by the pressure of measured medium.Thunder and lightning be a kind of at a high speed, high-octane short pulse, it invades the internal circuit of transmitter with different approach, and the lighter disturbs the normal operation of transmitter, heavy then transmitter was lost efficacy.General transmitter mostly is metal shell, and resistance to overvoltage and overcurrent capability deficiency, measured medium directly contacts with sensor diaphragm, and dielectric strength is low, can not meet the requirement of insulation.
Utility model content
The purpose of this utility model is to provide a kind of insulation lightning protection transmitter, makes for metal material, cause the dielectric strength of transmitter low, can not meet the problem of insulating requirements with the housing solved due to transmitter.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of insulation lightning protection transmitter, it comprises housing, be successively set on the entrance pressure joint in housing cavity, circuit board placed cavity, the top of housing is extended in the front end of entrance pressure joint, the afterbody of entrance pressure joint is provided with diffuse si oiling core body, change-over circuit plate is provided with in circuit board placed cavity, lightning protection circuit plate, the end of circuit board placed cavity is connected with cable, the end of circuit board placed cavity and cable gland hot-melt adhesive paste, described housing is made up of insulating material, the front end of described entrance pressure joint is metal bolts, the afterbody of described entrance pressure joint is connected with circuit board placed cavity by pressure ring, described housing and described metal bolts, circuit board placed cavity is welded together, silica gel is marked with in the inner chamber of described housing.
As further improvement of the utility model, the inner chamber of described diffuse si oiling core body is provided with diaphragm, chip, compensating circuit plate successively, and the inner chamber of described diffuse si wick body is marked with silicone oil.
Further improve as of the present utility model, in described circuit board placed cavity, be provided with the box body that two insulating material are made, be placed with described change-over circuit plate and described lightning protection circuit plate in two described box bodys respectively, in described box body, be marked with silica gel.
Further improve as of the present utility model, described box body is made of plastics.
Further improve as of the present utility model, the circuit of described lightning protection circuit plate is connected between the input line of transmitter and output line, comprise three grades of circuit, wherein first order circuit is by three ceramic gas discharge tube BL1, BL2, BL3 is formed, described one end of ceramic gas discharge tube BL1 is connected with the positive pole of circuit output end, the described other end of ceramic gas discharge tube BL1 is connected with the negative pole of output end of circuit, described one end of ceramic gas discharge tube BL2 is connected with the output head anode of circuit, the other end ground connection of described ceramic gas discharge tube BL2, described one end of ceramic gas discharge tube BL3 is connected with the negative pole of output end of circuit, the other end ground connection of described ceramic gas discharge tube BL3, second level circuit is made up of three glass discharge vessel DW1, DW2, DW3, one end of described glass discharge vessel DW1 is connected with the output head anode of circuit, the other end ground connection of described glass discharge vessel DW1, one end of described glass discharge vessel DW2 is connected with the negative pole of output end of circuit, the other end ground connection of described glass discharge vessel DW2, one end of described glass discharge vessel DW3 is connected with the output head anode of circuit, and the other end of described glass discharge vessel DW1 is connected with the negative pole of output end of circuit, tertiary circuit is made up of three Transient Voltage Suppressors SA1, SA2, SA3, the wherein said anode of Transient Voltage Suppressor SA1 is connected with the output head anode of circuit, the plus earth of described Transient Voltage Suppressor SA1, the plus earth of described Transient Voltage Suppressor SA2, the described negative electrode of Transient Voltage Suppressor SA2 is connected with the negative pole of output end of circuit, the described anode of Transient Voltage Suppressor SA3 is connected with the negative pole of output end of circuit, and the described negative electrode of Transient Voltage Suppressor SA3 is connected with the positive pole of the output terminal of circuit, three grades of circuit let out electricity step by step, effectively block the high electromagnetic pulse that thunder and lightning produces, protection transmitter from thunderbolt.
Further improve as of the present utility model, the output line both positive and negative polarity of described circuit is respectively equipped with self-healing fuse RT1, RT2, after first order circuit, resettable fuse is set, it has pressure-sensitive character, when having surge voltage, the input impedance of transmitter can be increased, strengthen first order circuit bleed off power.
Thunder and lightning is a kind of high speed, high-octane short pulse, and protection circuit is inoperative under normal circumstances, does not affect the performance of transmitter.When thunder and lightning electromagnetic interference (EMI) arrives, three ceramic gas discharge tubes can the electric current of bleed off 10KA, and most surge impact energy is discharged in first order discharge tube; The ceramic gas discharge tube disruptive discharge time is usual≤2 μ s, and shorter than the time of thunder-strike current tens of microseconds, components and parts therefore can be protected from thunderbolt.After the first order, arrange two resettable fuses, it has pressure-sensitive character, when having surge voltage, the input impedance of transmitter can be increased, strengthen first order bleed off power, ceramic gas discharge tube has precipitous non-linear to voltage, can discharge the surge impact energy of about 80% in this one-level; In the second level, glass discharge vessel has≤reaction time of 10ns, its bleed off power can reach 3KA, reaches absolutely majority all release through second level surge impact energy, and the induction residual voltage that the third level is born, residual flow are very little; The third level; Transient Voltage Suppressor-TVS pipe has≤reaction time of 1ns; when by high energy impact events; the high impedance of two inter-stages can be become Low ESR by it; absorb the surge power of multikilowatt; make the voltage clamp of two inter-stages in a predetermined value, the components and parts in the circuit of effective protection rear portion are from the damage of various surge pulse.Through the combination of multiple lightning protection component, be built into three lines of defence, effectively block the high energy electromagnetic pulse that thunder and lightning produces, reach the object of protection transmitter from thunderbolt.
Further improve as of the present utility model, the afterbody of described cable gland is provided with cavity, described cable top is run through described cavity and is connected with described lightning protection circuit plate, the top periphery of described cable is provided with two rubber rings, the centre of two rubber rings is provided with cable seal hold-down ring, and the tail end of described cable gland is connected to cable seal.
Further improve as of the present utility model, described cable seal is T-shaped.
Further improve as of the present utility model, described housing is made up of copolymerization acrylic material.
The beneficial effects of the utility model:
(1) in the utility model, described housing is made up of copolymerization acrylic material, only the front end of described entrance pressure joint is that metal bolts contacts with measured medium, enclosure interior is perfused with silica gel, silica gel has transmission of pressure, isolation measurement medium and measuring diaphragm, reach high-insulation, protect the object of described diffuse si oiling core body, can meet the requirement of working environment;
(2) lightning protection circuit plate described in the utility model is made up of triple lightning protection circuit, by carrying out triple precision combination to lightning protection components such as ceramic gas discharge tube, glass discharge vessel, Transient Voltage Suppressors, be built into three lines of defence, resistance to overvoltage and overcurrent capability strong, the high electromagnetic pulse that effective blocking-up thunder and lightning produces, the job safety of protection transmitter;
(3) housing of the present utility model and entrance pressure joint, circuit board placed cavity hot-melt adhesive paste, make Stability Analysis of Structures firm, have that structure is simple, low cost of manufacture, be suitable for the advantage produced in batches, the Measurement & Control of the field liquid levels such as the Treatment of Industrial Water engineering of thunder and lightning hotspot, building water tower level, environmental protection, water conservancy, power plant, city water supply and sewage, hydrologic exploration, oil field can be widely used in.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the structural representation of entrance pressure joint in Fig. 1;
Fig. 3 is the circuit theory diagrams of lightning protection circuit plate in Fig. 1;
In figure 1, entrance pressure joint, 2, housing, 3, diffuse si oiling core body, 4, metal bolts, 5, pressure ring, 6, circuit board placed cavity, 7, box body, 8, change-over circuit plate, 9, lightning protection circuit plate, 10, cable gland, 11, cable seal hold-down ring, 12, rubber ring, 13, wire seal, 14, cable.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
One insulation lightning protection transmitter as shown in Figure 1 to Figure 3, it comprises housing 2, be successively set on the entrance pressure joint 1 in housing 2 inner chamber, circuit board placed cavity 6, the top of housing 2 is extended in the front end of entrance pressure joint 1, the afterbody of entrance pressure joint 1 is provided with diffuse si oiling core body 3, change-over circuit plate 8 is provided with in circuit board placed cavity 6, lightning protection circuit plate 9, the end of circuit board placed cavity 6 is connected with cable 14, the end of circuit board placed cavity 6 and cable gland 10 hot-melt adhesive paste, housing 2 is made up of copolymerization acrylic material, the front end of entrance pressure joint 1 is metal bolts 4, the afterbody of entrance pressure joint 1 is connected with circuit board placed cavity 6 by pressure ring 5, housing 2 and metal bolts 4, circuit board placed cavity 6 is welded together, silica gel is marked with in the inner chamber of housing 2.
The inner chamber of diffuse si oiling core body 3 is provided with diaphragm, chip, compensating circuit plate successively, and the inner chamber of diffuse si wick body 3 is marked with silicone oil.
Be provided with in circuit board placed cavity 6 in box body 7, two box bodys 7 that two plastics make and be placed with change-over circuit plate 8 and lightning protection circuit plate 9 respectively, in box body 7, be marked with silica gel.
The circuit of lightning protection circuit plate 9 is connected between the input line of transmitter and output line, comprise three grades of circuit, wherein first order circuit is by three ceramic gas discharge tube BL1, BL2, BL3 is formed, one end of ceramic gas discharge tube BL1 is connected with the positive pole of circuit output end, the other end of ceramic gas discharge tube BL1 is connected with the negative pole of output end of circuit, one end of ceramic gas discharge tube BL2 is connected with the output head anode of circuit, the other end ground connection of ceramic gas discharge tube BL2, one end of ceramic gas discharge tube BL3 is connected with the negative pole of output end of circuit, the other end ground connection of ceramic gas discharge tube BL3, second level circuit is made up of three glass discharge vessel DW1, DW2, DW3, one end of glass discharge vessel DW1 is connected with the output head anode of circuit, the other end ground connection of glass discharge vessel DW1, one end of glass discharge vessel DW2 is connected with the negative pole of output end of circuit, the other end ground connection of glass discharge vessel DW2, one end of glass discharge vessel DW3 is connected with the output head anode of circuit, and the other end of glass discharge vessel DW1 is connected with the negative pole of output end of circuit, tertiary circuit is made up of three Transient Voltage Suppressors SA1, SA2, SA3, wherein the anode of Transient Voltage Suppressor SA1 is connected with the output head anode of circuit, the plus earth of Transient Voltage Suppressor SA1, the plus earth of Transient Voltage Suppressor SA2, the negative electrode of Transient Voltage Suppressor SA2 is connected with the negative pole of output end of circuit, the anode of Transient Voltage Suppressor SA3 is connected with the negative pole of output end of circuit, and the negative electrode of Transient Voltage Suppressor SA3 is connected with the positive pole of the output terminal of circuit, three grades of circuit let out electricity step by step, effectively block the high electromagnetic pulse that thunder and lightning produces, protection transmitter from thunderbolt.
The output line both positive and negative polarity of circuit is respectively equipped with self-healing fuse RT1, RT2, and after first order circuit, arrange resettable fuse, it has pressure-sensitive character, when having surge voltage, can increase the input impedance of transmitter, strengthens first order circuit bleed off power.
The afterbody of cable gland 10 is provided with cavity, cable 14 top is run through cavity and is connected with lightning protection circuit plate 9, the centre that the top periphery of cable 14 is provided with two rubber rings, 12, two rubber rings 12 is provided with cable seal hold-down ring 11, and the tail end of cable gland 10 is connected to T-shaped cable seal 13.
Entrance pressure joint 1, when producing, is first screwed in housing 2 by the utility model, and the tubulose aid heating of entrance pressure joint 1 endoporus, makes itself and housing 2 welding, and make the top of metal bolts 4 stretch out housing 2; Then diffuse si oiling core body 3 is loaded the afterbody of entrance pressure joint 1, load pressure ring 5, with fusion splicer, housing 2, pressure ring 5, circuit board placed cavity 6 are welded together; Successively change-over circuit plate 8, triple lightning protection circuit plate 9 are respectively charged in plastic box body 7, after having debugged all technical, in box body 7, pour into silica gel, two box bodys 7 are loaded in wiring board placed cavity 6, with fusion splicer by wiring board placed cavity 6 and cable gland 10 welding; The afterbody of cable gland 10 inserts cable 14 successively, places rubber ring 12, cable seal hold-down ring 11, another rubber ring 12, with the afterbody of T-shaped cable seal 13 hermetically-sealed cable sealing shroud; Finally give in the inner chamber of housing 2 and inject the thick silica gel of 2 ~ 3mm.
The utility model structure is simple, it is firm to connect between each ingredient, there are extremely strong insulating property, effectively can block the high electromagnetic pulse that thunder and lightning produces, resistance to overvoltage and overcurrent capability strong, drastically increase the reliability of transmitter, the Measurement & Control of the field liquid levels such as the Treatment of Industrial Water engineering of thunder and lightning hotspot, building water tower level, environmental protection, water conservancy, power plant, city water supply and sewage, hydrologic exploration, oil field can be widely used in.
Claims (9)
1. an insulation lightning protection transmitter, it comprises housing (2), be successively set on the entrance pressure joint (1) in housing (2) inner chamber, circuit board placed cavity (6), the top of housing (2) is extended in the front end of entrance pressure joint (1), the afterbody of entrance pressure joint (1) is provided with diffuse si oiling core body (3), change-over circuit plate (8) is provided with in circuit board placed cavity (6), lightning protection circuit plate (9), the end of circuit board placed cavity (6) is connected with cable (14), the end of circuit board placed cavity (6) and cable gland (10) hot-melt adhesive paste, it is characterized in that: described housing (2) is made up of insulating material, the front end of described entrance pressure joint (1) is metal bolts (4), the afterbody of described entrance pressure joint (1) is connected with circuit board placed cavity (6) by pressure ring (5), described housing (2) and described metal bolts (4), circuit board placed cavity (6) is welded together, silica gel is marked with in the inner chamber of described housing (2).
2. one insulation lightning protection transmitter according to claim 1, it is characterized in that: the inner chamber of described diffuse si oiling core body (3) is provided with diaphragm, chip, compensating circuit plate successively, the inner chamber of described diffuse si wick body (3) is marked with silicone oil.
3. one insulation lightning protection transmitter according to claim 1, it is characterized in that: in described circuit board placed cavity (6), be provided with the box body (7) that two insulating material are made, be placed with described change-over circuit plate (8) and described lightning protection circuit plate (9) respectively in two described box bodys (7), described box body is marked with silica gel in (7).
4. one insulation lightning protection transmitter according to claim 3, is characterized in that: described box body (7) is made of plastics.
5. the one insulation lightning protection transmitter according to claim 1 or 3, it is characterized in that: the circuit of described lightning protection circuit plate (9) is connected between the input line of transmitter and output line, comprise three grades of circuit, wherein first order circuit is by three ceramic gas discharge tube BL1, BL2, BL3 is formed, described one end of ceramic gas discharge tube BL1 is connected with the positive pole of circuit output end, the described other end of ceramic gas discharge tube BL1 is connected with the negative pole of output end of circuit, described one end of ceramic gas discharge tube BL2 is connected with the output head anode of circuit, the other end ground connection of described ceramic gas discharge tube BL2, described one end of ceramic gas discharge tube BL3 is connected with the negative pole of output end of circuit, the other end ground connection of described ceramic gas discharge tube BL3, second level circuit is made up of three glass discharge vessel DW1, DW2, DW3, one end of described glass discharge vessel DW1 is connected with the output head anode of circuit, the other end ground connection of described glass discharge vessel DW1, one end of described glass discharge vessel DW2 is connected with the negative pole of output end of circuit, the other end ground connection of described glass discharge vessel DW2, one end of described glass discharge vessel DW3 is connected with the output head anode of circuit, and the other end of described glass discharge vessel DW1 is connected with the negative pole of output end of circuit, tertiary circuit is made up of three Transient Voltage Suppressors SA1, SA2, SA3, the wherein said anode of Transient Voltage Suppressor SA1 is connected with the output head anode of circuit, the plus earth of described Transient Voltage Suppressor SA1, the plus earth of described Transient Voltage Suppressor SA2, the described negative electrode of Transient Voltage Suppressor SA2 is connected with the negative pole of output end of circuit, the described anode of Transient Voltage Suppressor SA3 is connected with the negative pole of output end of circuit, and the described negative electrode of Transient Voltage Suppressor SA3 is connected with the positive pole of the output terminal of circuit, three grades of circuit let out electricity step by step, effectively block the high electromagnetic pulse that thunder and lightning produces, protection transmitter from thunderbolt.
6. one insulation lightning protection transmitter according to claim 5, it is characterized in that: the output line both positive and negative polarity of described circuit is respectively equipped with self-healing fuse RT1, RT2, after first order circuit, resettable fuse is set, it has pressure-sensitive character, when having surge voltage, the input impedance of transmitter can be increased, strengthen first order circuit bleed off power.
7. one insulation lightning protection transmitter according to claim 1, it is characterized in that: the afterbody of described cable gland (10) is provided with cavity, described cable (14) top is run through described cavity and is connected with described lightning protection circuit plate (9), the top periphery of described cable (14) is provided with two rubber rings (12), the centre of two rubber rings (12) is provided with cable seal hold-down ring (11), and the tail end of described cable gland (10) is connected to cable seal (13).
8. one insulation lightning protection transmitter according to claim 7, is characterized in that: described cable seal (13) is for T-shaped.
9. one insulation lightning protection transmitter according to claim 1, is characterized in that: described housing (2) is made up of copolymerization acrylic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686476.0U CN204165676U (en) | 2014-11-17 | 2014-11-17 | A kind of insulation lightning protection transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686476.0U CN204165676U (en) | 2014-11-17 | 2014-11-17 | A kind of insulation lightning protection transmitter |
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| CN204165676U true CN204165676U (en) | 2015-02-18 |
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| CN201420686476.0U Active CN204165676U (en) | 2014-11-17 | 2014-11-17 | A kind of insulation lightning protection transmitter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082009A (en) * | 2019-03-26 | 2019-08-02 | 南京史利姆电子科技有限公司 | A method of the fixed diffusion silicon chip of sealing |
| TWI695400B (en) * | 2016-05-23 | 2020-06-01 | 大陸商力特半導體（無錫）有限公司 | Transient voltage suppression device with thermal cutoff |
| CN113358190A (en) * | 2021-05-31 | 2021-09-07 | 天水华天传感器有限公司 | Water alarm liquid level transmitter |
-
2014
- 2014-11-17 CN CN201420686476.0U patent/CN204165676U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI695400B (en) * | 2016-05-23 | 2020-06-01 | 大陸商力特半導體（無錫）有限公司 | Transient voltage suppression device with thermal cutoff |
| TWI718757B (en) * | 2016-05-23 | 2021-02-11 | 大陸商力特半導體（無錫）有限公司 | Transient voltage suppression device with thermal cutoff |
| US11139287B2 (en) | 2016-05-23 | 2021-10-05 | Littefluse Semiconductor (WUXI) Co., Ltd. | Transient voltage suppression device with thermal cutoff |
| CN110082009A (en) * | 2019-03-26 | 2019-08-02 | 南京史利姆电子科技有限公司 | A method of the fixed diffusion silicon chip of sealing |
| CN113358190A (en) * | 2021-05-31 | 2021-09-07 | 天水华天传感器有限公司 | Water alarm liquid level transmitter |
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