Explosion-proof controller

Abstract

The utility model discloses an explosion-proof controller. The explosion-proof controller comprises a box cover assembly, a box body and an electric control system, the electric control system is installed in the box body, the box cover assembly comprises a box cover body, and the box cover body is detachably installed on the box body so that the box body can be closed; the top face of the box cover body is arranged to be the plane, the weight is reduced, meanwhile, the disassembly and assembly auxiliary holes and the disassembly and assembly auxiliary grooves are formed, maintenance personnel can easily tighten or unscrew the box cover body only through tools due to the arrangement of the disassembly and assembly auxiliary holes, the disassembly and assembly auxiliary grooves are convenient for the maintenance personnel to install the box cover body, and the disassembly and assembly of the box cover body is facilitated. By means of the structure, misoperation of non-professionals is avoided, normal work of maintenance personnel is not affected, the sealing anti-explosion performance is ensured, meanwhile, the weight is reduced, later maintenance is facilitated, and meanwhile the use safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to controller technical field relates to an explosion -proof controller. BACKGROUND

[0002] The controller is widely used in flammable and explosive places such as petroleum, chemical industry, mine, and also is applicable to combustible dust site, such as military, precision machining, cement industry etc. It has the vital role to guarantee the safe operation in the industrial production process, can receive signal, handle signal and output signal, and ensures the safe use in flammable and explosive places.

[0003] The existing controller is often sealed to adapt to the explosive gas environment, and the environment causing explosion such as external dangerous gas and dust is isolated to ensure safety. The existing controller often has some deficiencies in design, for example, in order to facilitate the disassembly of the cover plate of the shell outside the controller, the cover plate is often designed as a convex structure on the top surface, although the structure can directly manually remove the cover plate and better disassemble, but it also causes the weight of the cover plate to become larger, which is not conducive to the disassembly and transportation of the entire control valve before installation and maintenance, and the easy disassembly also causes the non-professional personnel to misoperate. Or the cover plate is directly fixed on the explosion-proof shell by fastening screws, which is prone to uneven stress on the joint surface, and the disassembly is relatively complex, and the screw may be rusted and cannot be disassembled after a long time, which is not conducive to the development of later maintenance work.

[0004] To solve the above problems, the controller needs to be improved to ensure the sealing and explosion-proof performance, reduce the weight, and be conducive to the later maintenance and improve the use safety. INVENTION CONTENTS

[0005] Therefore, the utility model provides an explosion -proof controller, the top surface of the box cover body is arranged as a plane, the weight is reduced, the disassembly auxiliary hole and disassembly auxiliary groove are arranged, the disassembly auxiliary hole is arranged, and the maintenance personnel only needs to tighten or loosen the box cover body by tools, the disassembly auxiliary groove is convenient for the maintenance personnel to directly operate by hand when installing the box cover body or disassembling the loosened box cover body, the structure avoids the misoperation of non-professional personnel, and does not affect the normal work of the maintenance personnel, ensures the sealing and explosion-proof performance, reduces the weight, is more conducive to the later maintenance, and improves the use safety.

[0006] The utility model discloses an explosion -proof controller, including box cover subassembly, box body and electric control system, the electric control system is installed in the box body, the box cover subassembly includes box cover body, the box cover body detachable installation in the box body to make the box body be closed, the top surface of box cover body is plane structure, and the top surface of box cover body is provided with a plurality of dismounting auxiliary holes, and the box cover body still is provided with a plurality of dismounting auxiliary grooves along the circumference.

[0007] Further, the electric control system includes a screen display control assembly and a power circuit board card, the screen display control assembly is installed in the box body and located at a position close to the box cover body, and the power circuit board card is installed in the box body and located at a position between the screen display control assembly and the bottom surface of the box body.

[0008] Further, it further includes an electromagnetic key assembly, and the electromagnetic key assembly is integrally installed in the box body.

[0009] Further, the screen display control assembly includes a control circuit board card, a display screen and a baffle, the baffle is installed on the control circuit board card, the display screen is installed on the control circuit board card and located at a position between the baffle and the control circuit board card, the box body is provided with a first mounting position, the control circuit board card is installed on the first mounting position, the baffle is provided with an internal viewing window, and the center position of the display screen coincides with the center position of the internal viewing window.

[0010] Further, the electromagnetic key assembly includes a key rod member, an elastic member, a pressing plate and a cover, the box body is provided with a key slot hole, the elastic member is installed at the bottom of the key slot hole, the key rod member includes a key rod body and a magnet steel installed on the key rod body, the key rod body is provided with a guide end along the axial direction, the magnet steel is arranged close to the guide end, the key rod body is slidably inserted into the key slot hole with the guide end facing the bottom of the key slot hole, the guide end is inserted into the elastic member, the key rod body is further provided with a limiting side wall, the pressing plate is installed on the box body, the pressing plate is provided with a limiting hole, the key rod body is arranged in the limiting hole, and the pressing plate abuts against the limiting side wall so that the key rod body is limited in the key slot hole, and the cover is installed on the box body and surrounds the key rod body and the pressing plate.

[0011] Further, the box body is further provided with a second mounting position, and the power circuit board card is installed on the second mounting position.

[0012] Further, the box cover assembly further comprises an explosion-proof glass, a locking ring and an elastic washer, the box cover body is provided with an outer window, the explosion-proof glass is installed on the box cover body at the position corresponding to the outer window, the locking ring is installed on the box cover body, the locking ring tightly presses the explosion-proof glass on the box cover body, and the elastic washer is arranged at the position between the locking ring and the explosion-proof glass.

[0013] Further, the box cover body is further provided with a limiting groove and an explosion-proof thread, a sealing element is arranged in the limiting groove, the box body is provided with an explosion-proof thread matched with the explosion-proof thread, and the box cover body is installed on the box body in a threaded connection mode.

[0014] Further, the box cover body is further provided with a limiting groove and an explosion-proof thread, a sealing element is arranged in the limiting groove, the box body is provided with an explosion-proof thread matched with the explosion-proof thread, and the box cover body is installed on the box body in a threaded connection mode.

[0015] Further, the radial outer wall of the box body is inwardly recessed to form a transfer groove.

[0016] The utility model discloses beneficial effects:

[0017] The utility model provides a kind of explosion-proof controller, the top surface of box cover body is set as plane, reduce weight, simultaneously set up dismounting auxiliary hole and dismounting auxiliary groove, the setting of dismounting auxiliary hole makes maintenance personnel only need to be easily tightened or loosened by tool box cover body, and dismounting auxiliary groove is directly operated by hand when installation box cover body, or the box cover body of loosened dismounting, this structure avoids non-professional personnel misoperation, simultaneously will not affect maintenance personnel normal work, ensure sealing explosion-proof performance while, reduce weight, more conducive to later maintenance, simultaneously also improve use safety.

[0018] The utility model further improves the convenience of maintenance work by the following measures: (1) the box cover body of the utility model is installed on the box by explosion-proof thread, effectively plays explosion-proof effect, and explosion-proof thread structure is simple, easy to disassemble and assemble;(2) the box is provided with transfer groove, because controller weight is larger, transfer groove is set to provide sufficient space for manual handling of operator, improves the convenience of handling;(3) controller key mode is designed as electromagnetic key, utilizes electromagnetic principle to close and disconnect steel spring tube on circuit board, has good stability and replaceability, simple mechanical structure, low failure rate;(4) three first installation sites and second installation sites are designed in the box to install screen display control assembly and power circuit board card, can improve the shock resistance and stability of electronic components in controller. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The structure explosion schematic view of the utility model;

[0020] Figure 2 The structure section view of the box cover assembly of the utility model;

[0021] Figure 3 The structure schematic view of the box cover body of the utility model;

[0022] Figure 4 The structure schematic view of the screen display control assembly of the utility model;

[0023] Figure 5 The structure schematic view of the box body of the utility model;

[0024] Figure 6 The installation structure schematic view of the electromagnetic button assembly of the utility model;

[0025] Figure 7 The structure schematic view of the button rod body of the utility model;

[0026] Figure 8 The structure schematic view of the pressing plate of the utility model;

[0027] Figure 9 The structure schematic view of the sealing cover of the utility model. Specific implementation

[0028] It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] As shown in the figure, the utility model discloses a kind of explosion-proof controller, including box cover assembly 1, box 4 and electric control system;The electric control system is installed in the box 4, the box cover assembly 1 includes box cover body 11, the box cover body 11 detachably installed in the box 4 so that the box 4 is closed;The top surface of the box cover body 11 is plane structure, and the top surface of box cover body 11 is provided with four dismounting auxiliary holes 112, and the dismounting auxiliary hole 112 is threaded hole, when tightening or loosening of box cover body 11 is carried out, maintenance personnel only need to screw long screw or bolt into dismounting auxiliary hole 112, make the tail of long screw protrude higher than box cover body 11, immediately using valve hook or wrench etc. Tool can be operated, after tightening, unrelated personnel cannot directly open it by hand, more safe, simultaneously also solve the problem that cover is difficult to open when after-sales maintenance, controller is placed long-term or after use. The box cover body 11 is also provided with four dismounting auxiliary grooves 113 along the circumference, and the dismounting auxiliary groove 113 is arranged on the top edge of the box cover body 11, and is uniformly distributed, when loosening or installing box cover body 11, dismounting auxiliary groove 113 facilitates maintenance personnel to operate by hand. In the embodiment, the box cover assembly 1 further includes explosion-proof glass 13, locking pressure ring 16 and elastic washer 15, the box cover body 11 is provided with outer window 111, the explosion-proof glass 13 is attached and installed on the box cover body 11 by sealing glue 12 corresponding to the position of the outer window 111, the locking pressure ring 16 is installed on the box cover body 11, the locking pressure ring 16 tightly presses the explosion-proof glass 13 and limits the box cover body 11, the elastic washer 15 is arranged at the position between the locking pressure ring 16 and the explosion-proof glass 13;Elastic washer 15 not only can tightly press explosion-proof glass 13, but also can buffer the size change of explosion-proof glass 13 due to temperature change. In the embodiment, the box cover body 11 is also provided with limiting groove 116 and explosion-proof thread 115, the limiting groove 116 arranged on the upper part of the box cover is provided with sealing element, and the sealing element is rubber sealing element 14, the box 4 is provided with explosion-proof thread 42 matched with the explosion-proof thread 115, in order to facilitate the processing of explosion-proof thread 42, the box 4 is also retained with thread relief groove 43. The box cover body 11 is installed in the box 4 by threaded connection, and after the installation of the box cover body 11, the sealing element can improve the sealing property of the connecting position of the box 4 and the box cover body 11. The box cover body 11 is directly installed on the box 4 through explosion-proof thread 42, effectively plays the role of explosion-proof, and explosion-proof thread 42 is simple in structure and convenient to disassemble and assemble. In the embodiment, the top edge position of the box cover body 11 is also designed with a set screw hole 114, for installing locking screw 9, to further prevent non-operator from opening the box cover arbitrarily.

[0030] The electric control system comprises a screen display control assembly 2 and a power supply circuit board card 3. The screen display control assembly 2 is installed on the box body 4 and located close to the box cover body 11. The power supply circuit board card 3 is installed in the box body 4 and located between the screen display control assembly 2 and the bottom surface of the box body 4. In the embodiment, the screen display control assembly 2 comprises a control circuit board card 23, a display screen 22 and a baffle 21. The baffle 21 is installed on the control circuit board card 23 through a long support column 25. The display screen 22 is installed on the control circuit board card 23 through a short support column 24 and located between the baffle 21 and the control circuit board card 23. The long support column 25 and the short support column 24 are support columns provided with threaded holes. The baffle 21 and the display screen 22 can be directly installed through screws. The baffle 21 can be marked with an enterprise logo and a product model. The baffle 21 can shield the circuit devices in the controller, so that the display is more beautiful. The box body 4 is provided with a first mounting position 44. The first mounting position 44 is a circular (not limited to circular) support column. The first mounting position 44 is integrally formed on the bottom surface of the box body 4. There are three first mounting positions 44. The control circuit board card 23 is installed on the first mounting position 44. The baffle 21 is provided with an inner viewing window. The center position of the display screen 22 coincides with the center position of the inner viewing window. In the embodiment, the box body 4 is further provided with a second mounting position 41. The second mounting position 41 is a strip-shaped (not limited to strip-shaped) boss integrally formed on the side plate of the inner cavity of the box body 4. The power supply circuit board card 3 is installed on the second mounting position 41. The first mounting position 44 and the second mounting position 41 are integrally designed, which can improve the shock resistance and stability of the electronic components.

[0031] The electromagnetic button assembly 5 is integrally installed on the box body 4. The electromagnetic button assembly 5 comprises a button rod member 52, an elastic member 51, a pressing plate 53 and a cover 54. The box body 4 is provided with a button slot hole 45. The elastic member 51 is a spring and is arranged at the bottom of the button slot hole 45. The button rod member 52 comprises a button rod body 521 and a magnetic steel 522 installed on the button rod body 521. The button rod body 521 is provided with a mounting hole 5211. The magnetic steel 522 is installed in the mounting hole 5211. The button rod body 521 is provided with a guide end 5212 in the axial direction. The magnetic steel 522 is arranged close to the guide end 5212. The button rod body 521 is slidably inserted into the button slot hole 45 with the guide end 5212 facing the bottom of the button slot hole 45, so as to realize the pressing function of the button. The guide end 5212 is inserted into the elastic member 51, so that the elastic member 51 and the button rod body 521 are connected. The button rod body 521 is further provided with a limiting side wall 5213. The pressing plate 53 is installed on the box body 4 and is provided with a limiting hole 531. The button rod body 521 passes through the limiting hole 531. The pressing plate 53 abuts against the limiting side wall 5213, so that the button rod body 521 is limited in the button slot hole 45. The cover 54 is installed on the box body 4 and surrounds the button rod body 521 and the pressing plate 53. As shown in the figure, the pressing plate 53 is installed on the box body 4 by screws. The button rod body 521 is tightly limited in the box body 4 by the pressing plate 53. Then, the cover 54 is fixed on the support 6 of the box body 4 by pin connection. Finally, the cover is fixed on the box body 4 by hand screw 56, so as to complete the assembly of the electromagnetic button assembly 5. In this embodiment, the contact surface of the cover 54 and the box body 4 is further provided with a sealing ring 55. The cover 54 of this embodiment is designed with an annular groove 541 as shown in the figure, which is used for installing the sealing ring and can prevent impurities such as liquid and dust from entering, thereby protecting the electromagnetic button. The cover 54 is further designed with a rectangular groove 542, which provides sufficient space for the protruding magnetic button.

[0032] In this embodiment, a joint assembly is further included. The joint assembly comprises an explosion-proof plug 8' and an explosion-proof cable joint 8. The box body 4 is provided with a plurality of wiring holes 49. The wiring holes 49 are cable threaded holes, which are convenient for the passage of wire harness. The explosion-proof plug 8' or the explosion-proof cable joint 8 is installed in any wiring hole 49. Since the controller is widely used in various occasions, different numbers of cables need to be passed through in different occasions. Therefore, the explosion-proof plug 8' and the explosion-proof cable joint 8 are provided at the same time. The wiring hole 49 which needs to be threaded is provided with the explosion-proof cable joint 8, and the others are provided with the explosion-proof plug 8'.

[0033] In the embodiment, the radially outer wall of the box 4 is inwardly recessed to form a transfer groove 48. Since the controller is heavy, two transfer grooves 48 are designed on the outer bottom of the box 4 as shown in the figure, which leaves sufficient space for the operator to manually carry, thereby improving the convenience of carrying. The box 4 is also provided with a sign hole 46 and a sign 7 is installed.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions should be covered in the scope of the claims of the present application.

Claims

1. An explosion-proof controller, characterized in that: It includes a box cover assembly, a box body and an electronic control system; the electronic control system is installed in the box body, and the box cover assembly includes a box cover body, which is detachably installed on the box body to close the box body; the top surface of the box cover body is a planar structure, and the top surface of the box cover body is provided with multiple disassembly and assembly auxiliary holes, and the box cover body is also provided with multiple disassembly and assembly auxiliary grooves along the circumference.

2. The explosion-proof controller according to claim 1, characterized in that: The electronic control system includes a screen display control component and a power circuit board card. The screen display control component is installed in the box and is located close to the box cover body. The power circuit board card is installed in the box and is located between the screen display control component and the bottom surface of the box.

3. The explosion-proof controller according to claim 1, characterized in that: It also includes an electromagnetic button assembly, which is integrally installed on the box.

4. The explosion-proof controller according to claim 2, characterized in that: The screen display control assembly includes a control circuit board card, a display screen and a baffle, the baffle is installed on the control circuit board card, the display screen is installed on the control circuit board card and is located between the baffle and the control circuit board card; the box body is provided with a first mounting position, the control circuit board card is installed at the first mounting position, the baffle is provided with an inner window, and the center position of the display screen coincides with the center position of the inner window.

5. The explosion-proof controller according to claim 3, characterized in that: The electromagnetic key assembly includes a key rod component, an elastic component, a pressure plate and a cover, the box body is provided with a key slot hole, the elastic component is installed at the bottom of the key slot hole, the key rod component includes a key rod body and a magnet installed on the key rod body, the key rod body is provided with a guide end along the axial direction, the magnet is arranged close to the guide end, the key rod body is slidably inserted into the key slot hole with the guide end facing the bottom of the key slot hole, the guide end is inserted into the elastic component, the key rod body is also provided with a limiting side wall, the pressure plate is installed in the box body, the pressure plate is provided with a limiting hole, the key rod body is passed through the limiting hole, the pressure plate is abutted against the limiting side wall so that the key rod body is limited to the key slot hole, and the cover is installed in the box body and surrounds the key rod body and the pressure plate.

6. The explosion-proof controller according to claim 2, characterized in that: The box body is further provided with a second installation position, and the power circuit board card is installed at the second installation position.

7. The explosion-proof controller according to claim 1, characterized in that: The box cover assembly also includes explosion-proof glass, a locking pressure ring and an elastic gasket. The box cover body is provided with an external window. The explosion-proof glass is installed on the box cover body at a position corresponding to the external window. The locking pressure ring is installed on the box cover body. The locking pressure ring presses the explosion-proof glass to be limited to the box cover body. The elastic gasket is arranged between the locking pressure ring and the explosion-proof glass.

8. The explosion-proof controller according to claim 1, characterized in that: The box cover body is further provided with a limiting groove and an explosion-proof thread, a sealing member is provided in the limiting groove, the box body is provided with an explosion-proof thread matching the explosion-proof thread, and the box cover body is installed on the box body by a threaded connection.

9. The explosion-proof controller according to claim 1, characterized in that: It also includes a connector assembly, which includes an explosion-proof plug and an explosion-proof cable connector. The box body is provided with a plurality of wiring holes, and any of the wiring holes is installed with an explosion-proof plug or an explosion-proof cable connector.

10. The explosion-proof controller according to claim 1, characterized in that: The radial outer wall of the box body is recessed inward to form a transfer groove.

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