CN208509454U - A kind of intelligent controller for explosion hazard area positive pressure type equipment - Google Patents

Abstract

The utility model discloses a kind of intelligent controller for explosion hazard area positive pressure type equipment, including shell, mainboard, power panel and keypad are installed in the shell；The mainboard includes CPU, pressure detection circuit, display circuit, reversed obstruction circuit and warning circuit；The pressure detection circuit, display circuit, reversed obstruction circuit and warning circuit and the CPU are electrically connected；The power panel includes isolated power supply circuit and safety barrier circuit；The isolated power supply circuit access external power supply input, and working power is provided to the mainboard through the safety barrier circuit；It is provided with form and facial mask on the shell, constitutes complete guard shield.The shell of the utility model is using the increased safety shell for meeting GB3836.3 requirement.Increased safety shell is small in size, light weight and cost is low relative to Flameproof shell, and relative to traditional flame-proof type scheme, volume can reduce 60%, and weight can reduce 80%, and product casing cost can reduce 50%.

Description

A kind of intelligent controller for explosion hazard area positive pressure type equipment

Technical field

The utility model belongs to inflammable and explosive hazardous area electric automatization control field, specifically a kind of for danger of exploding The intelligent controller of dangerous place positive pressure type equipment.

Background technique

Positive pressure type equipment especially positive pressure control cabinet is widely used in chemical industry, oil refining, oil exploitation, offshore platform, postal Wheel, the explosion hazard areas such as military project.Positive airway pressure apparatus generally requires configuration positive pressure control system and air-channel system, positive pressure controller are The core component of positive airway pressure apparatus, it is external to carry out certification of explosion protection generally as separate part, but price is high；The country is used as separate part The product of certification is less, can be used for 1st area of explosion hazard area, 2nd area and dust atmosphere, positive pressure controller small in size, at low cost Less.

Utility model content

The purpose of the utility model is to overcome the technical problems present on, provide one kind and are being used for explosion hazard area just The intelligent controller of tamping plant.

To achieve the above object, the technical solution adopted in the utility model is as follows:

A kind of intelligent controller for explosion hazard area positive pressure type equipment, including shell are equipped in the shell Mainboard, power panel and keypad；The mainboard includes CPU, pressure detection circuit, display circuit, reversed obstruction circuit and alarm Circuit；The pressure detection circuit, display circuit, reversed obstruction circuit and warning circuit and the CPU are electrically connected；The electricity Source plate includes isolated power supply circuit and safety barrier circuit；The isolated power supply circuit access external power supply input, and through the peace Full grid circuit provides working power to the mainboard；It is provided with form and facial mask on the shell, constitutes complete guard shield； It is provided with grounding assembly on the shell, for external ground connection；On the shell aperture and by the hole install Glan, be used for External inlet wire connection；The back side of shell aperture simultaneously installs pneumatic BULKHEAD UNION, ventilating component and seal washer, and described ventilative group The external gas pressure is introduced into internal sensor interface reality by the tracheae (13) being assemblied on the pneumatic BULKHEAD UNION by part Existing pressure detecting；Key hole is opened up at the corresponding shell position of the keypad, to realize peripheral operation function；It is described to press Gasket seal is installed, to guarantee the protective performance of shell between keypad and shell.

Further, the pressure detection circuit is micro-pressure sensor.

Further, the display circuit is 128x64 liquid crystal.

Further, the isolated power supply circuit is intrinsic safety isolated power supply module.

Further, the safety barrier circuit is realized using fuse and zener diode combinational circuit, and is used and poured sealed knot Structure.

Further, the shell uses cast aluminium alloy die cast.

Further, the form uses the injection molding of PC transparent material.

Further, the ventilating component uses metallic particles sintering structure.

The utility model has the beneficial effects that

1. the utility model is according to electric circuit characteristic, by pressure detection circuit, display circuit by low power consumption method, limit energy side Method, energy partition method are designed, and allow to realize intrinsic safety requirement, while using and meeting as defined in GB3836.4 standard Reliable isolation element, devises safety barrier circuit, to be effectively isolated the end AC and intrinsically safe circuit, pass danger energy will not It is delivered to intrinsically safe circuit；Encapsulation then is carried out using the method for meeting GB3836.9 for the end AC and output circuit, with the fire that eliminates danger Colored or dangerous temperature generates.

2. the shell of the utility model is using the increased safety shell for meeting GB3836.3 requirement.Increased safety shell relative to every Quick-fried type shell, small in size, light weight and cost is low, relative to traditional flame-proof type scheme, volume can reduce 60%, and weight can be with Reduction 80%, product casing cost can reduce 50%.

3. being easier to simplify the gas circuit structure of pressure detecting using increased safety structure, the utility model uses metal sintering material Gas permeable material made of expecting can be freely mounted to upside and the rear side of shell, mating easy for installation for positive pressure system；

4. more it is simplified the window structure of display circuit using increased safety structure, while structure can rationally design, It observes more intuitive, more attractive；Press-key structure is also more simplified compared to flame-proof type structure, as long as realizing IP degree of protection, because This feel is more comfortable, operates sensitiveer.

Detailed description of the invention

A kind of Fig. 1: cross-sectional view of the intelligent controller for explosion hazard area positive pressure type equipment of the utility model.

A kind of Fig. 2: main view of the intelligent controller for explosion hazard area positive pressure type equipment of the utility model.

Fig. 3: the utility model internal part is electrically connected schematic diagram.

Label declaration:

1: shell；2: mainboard；21:CPU；22: pressure detection circuit；23: display circuit；24: reversely blocking circuit；25: Warning circuit；3: form；4: power panel；42: isolated power supply circuit；41: safety barrier circuit；5: keypad；6: gasket seal；7: Glan；8: grounding assembly；9: facial mask；10: seal washer；11: pneumatic BULKHEAD UNION；12: ventilating component；13: tracheae.

Specific embodiment

With reference to the accompanying drawing and the utility model is described in detail in embodiment.

Embodiment one:

As shown in Figure 1-3, a kind of intelligent controller for explosion hazard area positive pressure type equipment, including shell 1, it uses Cast aluminium alloy die cast.Mainboard 2, power panel 4 and keypad 5 are installed in the shell 1.The mainboard 2 include CPU21, Pressure detection circuit 22, display circuit 23, reversed obstruction circuit 24 and warning circuit 25；The pressure detection circuit 22, display Circuit 23, reversed obstruction circuit 24 and warning circuit 25 and the CPU are electrically connected.Wherein, pressure detection circuit 22 is minute-pressure Gap sensor, the display circuit 23 are 128x64 liquid crystal.The power panel 4 includes isolated power supply circuit 42 and safety barrier circuit 41；The isolated power supply circuit 42 accesses external power supply input, and provides work to the mainboard 2 through the safety barrier circuit 41 Power supply.Wherein, isolated power supply circuit 42 is intrinsic safety isolated power supply module, and safety barrier circuit 41 uses fuse and zener diode group It closes circuit to realize, and uses and pour seal structure.Form 3 and facial mask 9 are provided on the shell 1, form 3 is infused using PC transparent material It is moulded into type, constitutes complete guard shield, realizes IP65 degree of protection.Meanwhile grounding assembly 8 is provided on the shell 1, it uses It is grounded in outside；On the shell 1 aperture and by the hole install Glan 7, for external inlet wire connect.The shell 1 is carried on the back Face aperture simultaneously installs pneumatic BULKHEAD UNION 11, ventilating component 12 and seal washer 10, and the ventilating component 12 uses metallic particles Sintering structure, the ventilating component 12 are drawn the external gas pressure by the tracheae 13 being assemblied on the pneumatic BULKHEAD UNION 11 Enter to internal sensor interface and realize pressure detecting, and realizes IP65 degree of protection.Wherein, gasket seal 10 uses PTFE material It is made, to guarantee IP65 degree of protection.It is anti-that non-intrinsic safety electrical component on power panel 4 uses encapsulation method to realize in addition to terminal Quick-fried requirement, connecting terminal realize requirement of explosion proof using increased safety measure.It is opened up at corresponding 1 position of shell of the keypad 5 Key hole, to realize peripheral operation function.Gasket seal 6 is installed, to guarantee shell between the keypad 5 and shell 1 Protective performance.The display circuit 23 on mainboard 2 realizes display function by form 3 simultaneously.

Be briefly described below down working principle of the utility model is:

AC AC power source accesses isolated power supply circuit 42, and isolated power supply circuit 42 uses " intrinsic safety isolated power supply ", realizes danger Dangerous energy isolation, intrinsic safety quarantine measures realize the intrinsic safety insulation request of GB3836.4, power to electronic circuit thereafter.Every Low-voltage dc power supply from power supply output is after safety barrier circuit 41 to main board power supply thereafter.Pressure detection circuit 22 will be external Pressure signal is converted into electric signal and acquires to calculate by CPU21 to realize external pressure real-time measurement function.CPU21 reads key The input information of plate 5, while real-time display is carried out by display circuit 23 and realizes human-computer interaction function.CPU21 is set according to program Fixed function is by reversely blocking 24 drive control of circuit and warning circuit 25.

In addition illustrate, the utility model introducing device can use lighter increased safety terminal, can be further Reduce cost.The degree of protection of the utility model has reached IP65, therefore also meets dust explosion protection as required.The utility model In the explosion-proof upper dust-type measure protected using ib intrinsic safety type, mb pouring type, eb increased safety and tD by shell, IIC is realized Explosion proof ratings, the requirement of T6 temperature class can be applied to 1st area and 2nd area and 21st area and 22nd area of dust atmosphere of gaseous environment, Most of region of explosion hazard area is covered in addition to 0th area of gas.

Finally, it should be noted that above embodiments are only to illustrate the utility model and not limit the utility model and retouched The technical solution stated；Therefore, although this specification the utility model is had been carried out referring to above-mentioned each embodiment it is detailed Illustrate, still, those skilled in the art should understand that, it still can modify to the utility model or equally replace It changes；And the technical solution and its improvement of all spirit and scope for not departing from the utility model, it should all cover practical new at this In the scope of the claims of type.

Claims (8)

1. a kind of intelligent controller for explosion hazard area positive pressure type equipment, which is characterized in that described including shell (1) Mainboard (2), power panel (4) and keypad (5) are installed in shell (1)；The mainboard (2) includes CPU (21), pressure detecting electricity Circuit (24) and warning circuit (25), are reversely blocked at display circuit (23) in road (22)；The pressure detection circuit (22), display Circuit (23) reversely blocks circuit (24) and warning circuit (25) and CPU electric connection；The power panel (4) include every From power circuit (42) and safety barrier circuit (41)；Isolated power supply circuit (42) the access external power supply input, and described in warp Safety barrier circuit (41) provides working power to the mainboard (2)；It is provided with form (3) and facial mask (9) on the shell (1), Constitute complete guard shield；Grounding assembly (8) are provided on the shell (1), for external ground connection；On the shell (1) Aperture simultaneously installs Glan (7) by the hole, connects for external inlet wire；Shell (1) back side aperture and install pneumatically wear Plate connector (11), ventilating component (12) and seal washer (10), the ventilating component (12) is by being assemblied in the pneumatic threading The external gas pressure is introduced into internal sensor interface and realizes pressure detecting by the tracheae (13) on connector (11)；In the key Plate (5) opens up key hole at corresponding shell (1) position, to realize peripheral operation function；The keypad (5) and shell (1) gasket seal (6) are installed between, to guarantee the protective performance of shell.

2. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute Stating pressure detection circuit (22) is micro-pressure sensor.

3. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute Stating display circuit (23) is 128x64 liquid crystal.

4. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute Stating isolated power supply circuit (42) is intrinsic safety isolated power supply module.

5. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute It states safety barrier circuit (41) to realize using fuse and zener diode combinational circuit, and uses and pour seal structure.

6. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute Shell (1) is stated using cast aluminium alloy die cast.

7. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute Form (3) are stated using the injection molding of PC transparent material.

8. the intelligent controller according to claim 1 for explosion hazard area positive pressure type equipment, which is characterized in that institute Ventilating component (12) are stated using metallic particles sintering structure.