KR200316867Y1 - locking device established on the entrance of case having either blasting protection or nonblasting protection structure - Google Patents

Abstract

The present invention relates to a locking device formed on the opening and closing door of the case having an explosion-proof or non-explosion-proof structure used in petrochemical, gas, heavy industry equipment, refinery-related factories and storage, more specifically the risk of explosion due to high temperature, high pressure If the internal pressure rises above the standard value, the lock device will explode when the internal pressure rises above the standard value in the explosion-proof case or the locking device installed in the opening / closing door of the thermo-hygrostat case that maintains constant temperature and humidity. It relates to a locking device installed on the opening and closing door of the case having an explosion-proof structure to prevent in advance.

Flange fixed to one side of the opening and closing door of the case having an explosion-proof or non-explosion-proof structure to achieve the object of the present invention; A fastening nut having a synthetic washer at the front to be screwed to the outer circumference of the flange to fix the flange to the case; A shaft axially inserted into the flange, the rear end of the shaft being protruded outwardly and rotatable within the flange; A pressure regulating member formed at a front outer periphery of the shaft to move the shaft in an axial direction when an internal pressure of the flange rises; A snap ring which is in close contact with the upper part of the shaft to maintain the airtightness of the storage chamber and the outer periphery is fixed to the inner wall surface of the flange; One end is fixed to the rear end of the shaft by the fastening bolt and the other end is extended to one side to lock and unlock the opening and closing door of the case; A length adjusting means coupled to an upper part of the clasp so as to elastically support the clasp in the axial direction and to adjust the length of the clasp according to the fastening amount of the fastening bolt; And a knob having a handle protruding outward so that one end is coupled to the upper inside of the shaft and the other end rotates the shaft and the latch at the same time.

Description

Locking device established on the entrance of case having either blasting protection or nonblasting protection structure}

The present invention relates to a locking device formed on the opening and closing door of the case having an explosion-proof or non-explosion-proof structure used in petrochemical, gas, heavy industry equipment, refinery-related factories and storage, more specifically the risk of explosion due to high temperature, high pressure If the internal pressure rises above the standard value, the lock device will explode when the internal pressure rises above the standard value in the explosion-proof case or the locking device installed in the opening / closing door of the thermo-hygrostat case that maintains constant temperature and humidity. It relates to a locking device installed on the opening and closing door of the case having an explosion-proof structure to prevent in advance.

In general, petrochemicals, gas, heavy industry equipment, refinery-related factories and reservoirs handle many dangerous substances at high temperatures in various processes, and thus pose a risk of fire or gas poisoning due to explosion. In addition, the explosion of the site is a fire that spreads to the factory and the surrounding residential area, leading to a large accident. Most of the cases installed in these manufacturing plants have an explosion-proof structure.

Cases with explosion-proof structure are classified into frame proof type, oil immersed type, pressurized type, increased safety type, special explosion-proof structure, etc. Locking device is used for opening / closing door. In this case, the inside of explosion-proof case is made of explosion-proof structure of PCB board with mechanical elements and electric and electronic parts and electrical connection part which connects them electrically. Even if an explosion occurs due to sparks, arcs or high temperature of an electrical device, the case is to be verified by an explosion test so that the case can withstand the pressure and there is no danger of lowering the external explosive vapor through the joint opening.

However, the explosion-proof case as described above is installed through verification at the time of installation, but in the case of the lock device installed on the opening and closing door of the explosion-proof case, using a lock device that is generally used for non-explosion-proof case without safety inspection sometimes causes a risk of accident have.

Normally, the inside of the case is kept in a closed state. If the door is not opened for a long time, the pressure increases slightly between the flange and the shaft inside the locking device. There was a problem to generate a fire.

In addition, the thermo-hygrostat is a device that maintains a constant temperature and humidity in the room.It is mainly installed in the computer room and the precision measurement room for use.The pressure inside the locking device in the process of sufficiently controlling the amount of heat generated in the computer room is used. When the flange part explodes due to this rise, there is a problem that the precision device is damaged as well as the risk of fire along with the heat generated from the computer room.

In addition, in the case of the locking device installed on the opening and closing door of the non-explosion-proof case that is generally used, there is a defect that always has the risk of explosion due to the increase in the internal pressure.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to form a pressure regulating member on the outer periphery of the shaft inserted into the flange of the locking device installed on the opening / closing door of the case having an explosion-proof or non-explosion-proof flange When pressure is applied to the inside of the shaft, the shaft moves in the axial direction by the elastic force of the pressure regulating member, temporarily actuating the latch coupled to the rear of the shaft and then restoring it to its original state. It is to provide a locking device that is installed in the opening and closing door of the case having an explosion-proof structure to prevent the explosion in advance.

Another object of the present invention is to improve the production line by simultaneous engineering so that the locking device can be manufactured relatively easily economically, and to reduce the cost of the product by improving the product quality and work process. It is to provide a locking device installed on the opening and closing door of the case having an explosion-proof structure.

Another object of the present invention is to insert the length adjusting means in the middle of the latch is inserted into the extension formed in the rear of the shaft of the locking device and then fastening the fastening bolts and the fastening bolts at the same time is supported by the length adjusting means According to the fastening amount of the clasp to provide a locking device is installed on the opening and closing door of the case having an explosion-proof structure to enable the length adjustment in the vertical direction.

Another object of the present invention is to form a plurality of projections on the upper portion of the support plate formed on the length adjusting means to recognize the locking and unlocking state of the latch from the outside when locking and unlocking the door opening and closing the knob when the knob is rotated It is to provide a locking device that is installed in the opening and closing door of the case having an explosion-proof structure so that the user can recognize the sound of the sound while being inserted into the guide groove formed on the rear bottom surface of the flange to recognize the locking and unlocking state of the latch.

Flange fixed to one side of the opening and closing door of the case having an explosion-proof or non-explosion-proof structure to achieve the object of the present invention; A fastening nut having a synthetic washer at the front to be screwed to the outer circumference of the flange to fix the flange to the case; A shaft axially inserted into the flange, the rear end of the shaft being protruded outwardly and rotatable within the flange; A pressure regulating member formed at a front outer periphery of the shaft to move the shaft in an axial direction when an internal pressure of the flange rises; A snap ring which is in close contact with the upper part of the shaft to maintain the airtightness of the storage chamber and the outer periphery is fixed to the inner wall surface of the flange; One end is fixed to the rear end of the shaft by the fastening bolt and the other end is extended to one side to lock and unlock the opening and closing door of the case; A length adjusting means coupled to an upper part of the clasp so as to elastically support the clasp in the axial direction and to adjust the length of the clasp according to the fastening amount of the fastening bolt; And a knob having a handle protruding outward so that one end is coupled to the upper inside of the shaft and the other end rotates the shaft and the latch at the same time.

1 is a perspective view showing the overall structure of the lock device of the present invention

Figure 2 is a longitudinal cross-sectional view of the lock device of the present invention

Figure 3 is a longitudinal sectional view showing an operating state of the lock device of the present invention

Figure 4 is a longitudinal cross-sectional view showing a state of use of the subject innovation length adjusting means

Figure 5 is a cross-sectional view showing another embodiment of the subject innovation length adjusting means

Description of the main part of the drawing

10 flange 11 stepped portion

12: storage chamber 13: insertion hole

14: insertion groove 15: guide groove

16: tightening nut 17: washer

20: shaft 21: body

22: extension 23: fastening groove

24: fixing groove 30: pressure control member

31: spring 32: washer

33: snap ring 40: latch

41: protrusion 42: fastening bolt

50: length adjusting means 51: support plate

52: projection 53: elastic member

60 knob 61 knob

62: engaging projection 63: groove

64: oil ring 65: snap ring

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the overall structure of the present invention and Figure 2 is a longitudinal cross-sectional view showing the internal structure of the present invention, the present invention is inserted into one side of the opening and closing door of the explosion-proof or non-explosion-proof case having an electrical device and a control device therein And the shaft 20 and the clasp 40 and the shaft (10) which are simultaneously rotated in accordance with the rotation of the flange 10, the knob 60 inserted in front of the flange 10, and the knob 60 fixed to the fastening nut 16. 20 is formed between the clasp 40 and elastically supporting the clasp 40 in the axial direction, and the length adjusting means 50 for adjusting the axial length of the clasp 40 according to the fastening amount of the fastening bolts 42. It is largely composed.

The flange 10 is coupled to one side of the opening and closing door (2) of the explosion-proof or non-explosion-proof case (1) in which an electric device and a control device are built, and the rear of the flange (10) having a thread formed on the outer periphery of the opening and closing door (2) Is inserted into the front end of the flange 10, the stepped portion 11 is formed larger than the rear outer diameter is maintained in close contact with the opening and closing door (2) to the opening and closing door (2) by the fastening nut 16 to be described later It is tightly fixed.

A storage chamber 12 is formed inside the flange 10, and an insertion hole 13 is formed in the rear of the storage chamber 12 so that one end of the shaft 20 to be described later penetrates. Insertion grooves 14 and 14a are formed in the upper and center portions of the inner wall surface thereof, and snap rings 31 and 65 are fixed to the respective insertion grooves 14 and 14a.

A plurality of guide grooves 15 are formed on the rear bottom surface of the flange 10 so that the protrusions 52 of the support plate 51 to be described later are inserted and detached during rotation to latch the case opening and closing door 2. The lock and unlock state of 40) can be heard and recognized by the user.

The fastening nut 16 is screwed to the outer circumference of the flange 10 to fix the flange 10 to the opening and closing door 2. First, the packing 17 is inserted before the fastening nut 16 is fastened. When the washer 18 made of synthetic resin is inserted in sequence and the fastening nut 16 is fastened, the fastening nut 16 is firmly adhered to the washer 18 made of synthetic resin, thereby completing the fixing of the flange 10.

The shaft 20 is inserted into the storage chamber 12 of the flange 10. At this time, the upper surface of the shaft 20 is formed by extending a predetermined length of the stepped body 21 smaller than the upper outer diameter by a predetermined length. One end of the body 21 penetrates the insertion hole 13 of the flange 10 while the pressure adjusting member 30 to be described later is inserted into the outer circumference of the flange 10.

On the bottom of the body 21, the extension portion 22 is formed to extend a predetermined length slightly smaller than the outer diameter of the body 21, the length adjusting means 50 and the clasp 40 to be described later are sequentially inserted extension 22 Screw the fastening bolts 42 into the fastening grooves 23 formed on the inner side of the screws. At this time, the extension part 22 is formed in a quadrangular shape so as to simultaneously rotate the clasp 40 inserted into the extension part 22.

A fixing groove 24 is formed on the upper portion of the body 21 to insert and fix the coupling protrusion 62 of the knob 60 to be described later to rotate the shaft 20.

The pressure regulating member 30 is composed of a spring 31 having an elastic force and is fitted to the outer circumference of the body 21 so that the pressure inside the hermetically sealed flange 10 rises due to the elastic force of the spring 31. ) Moves in the axial direction. At this time, while the shaft 20 rotates in the axial direction, the latch 40 coupled to the extension part 22 of the body 21 is temporarily rotated, and the pressure of the storage chamber 12 is restored while being restored to its original state. Maintained.

The washer 32 made of synthetic resin is inserted into the bottom of the spring 31 to support the bottom of the spring 31 and the spring 31 made of metal when the shaft 20 and the spring 31 are rotated is flange 10. The washer 32 is inserted into the bottom surface of the spring 31 so as to be in close contact with the bottom surface of the storage chamber 12 and to prevent noise from being generated during rotation.

The snap ring 33 is formed of a plate body, and a through hole 34 is formed therein, and an outer circumference is inserted and fixed in the insertion groove 14a formed in the center of the storage chamber 12 of the flange 10 so that the shaft 20 is stored. The separation of the chamber 12 is prevented and the airtightness of the storage chamber 12 is maintained.

Clasp 40 is one side is inserted into the extension portion 22 of the shaft 20 is fixed to the extension portion 22 by the fastening bolts 42, forming a protrusion 41 protruding a predetermined length to the other side The opening and closing door (2) to be able to lock and release.

The fastening bolt 42 is screwed into the fastening groove 23 of the extension portion 22 in the state in which the washer 43 is inserted to support the bottom surface of the side of the clasp 40 so that the length adjusting means 50 will be described later. The tightening amount is determined (see FIG. 4).

The length adjusting means 50 is inserted into the extension part 22 of the shaft 20 to support the clasp 40 in the axial direction and to move in the axial direction. The upper portion of the support plate 51 made of a plate body is provided. Forming a plurality of protrusions 52 in the embossed shape to be coupled to the guide groove 15 formed on the rear bottom surface of the flange 10 and the inside of the support plate 51 is hollow is inserted into the extension 22, An elastic member 53 is inserted into the bottom of the support plate 51 and the upper portion of the clasp 40 to elastically support the upper surface of the clasp 40. In addition, the elastic member 53 adjusts the length of the latch 40 in the axial direction according to the fastening amount of the fastening bolts 42 so as to securely lock and unlock the opening and closing door 2 when installed in the opening and closing door 2.

Knob 60 has a handle 61 is formed on the top so as to hold by hand to protrude to the upper portion of the flange 10, to form a coupling projection 62 protruding in the vertical direction on the bottom of the handle 61 shaft Inserted into the insertion groove 14 of the (20) so that the knob 60 and the shaft 20 can be rotated at the same time, the intermediate portion of the handle 61 and the engaging projection 62 is formed in a stepped manner and the outer circumference After forming a plurality of grooves (63) (63a) in the lower groove (63a) to insert the oil ring 64 to maintain the airtightness of the storage compartment 12 to prevent water or other dirt from entering. .

In addition, when the snap ring 65 is inserted into the upper groove 63 of the knob 60 and coupled to the storage chamber 12 of the flange 10, the snap ring 65 is in close contact with the upper groove 63. When the 60 is inserted into the storage chamber 12, the snap ring 65 is inserted into the insertion groove 14 formed in the upper wall of the storage chamber 12, thereby preventing the knob 60 from being separated from the storage chamber 12. .

As described above, the operation state will be described with reference to the accompanying drawings a locking device installed on the opening and closing door of the case having an explosion-proof structure.

In order to install the locking device of the present invention on one side of the opening and closing door of the explosion-proof or non-explosion-proof case in which the electric device and various control devices are built, the washer 32 is first inserted into the inner storage chamber 12 of the flange 10. When the spring 31 is inserted into the body 21 of the shaft 20 and the shaft 20 is inserted into the storage chamber 12, the bottom surface of the body 21 passes through the insertion hole 13 of the flange 10. The proper height is maintained by the height of the spring 31 and the turn performance.

When the snap ring 33 is pressed into the insertion groove 14a in such a state, the upper surface of the shaft 20 remains in close contact with the bottom surface of the snap ring 33, and thus the storage chamber 12 in which the shaft 20 is located. Confidentiality is maintained.

When such a series of operations are completed, the engaging projection 62 of the knob 60 is inserted into the fixing groove 24 of the shaft 20, wherein the upper ring 63 formed in the knob 60 has a snap ring 65. ) And the oil ring 64 is inserted into the lower groove 63a, and then the knob 60 is inserted into the storage chamber 12 so that the engaging protrusion 62 formed in the quadrangular shape fits into the fixing groove 24 and the snap ring ( 65 is coupled to the insertion groove 14 of the storage chamber 12 to prevent the knob 60 from escaping to the upper portion of the flange 10 and at the same time the knob 60 and the shaft 20 perform the same rotational movement. Done.

Here, the knob 60 is inserted into the storage chamber 12 while the oil ring 64 is in close contact with the wall surface of the storage chamber 12 to prevent water, rainwater, and other contaminants from flowing into the storage chamber 12. To maintain confidentiality.

On the other hand, the handle 61 is formed on the upper portion of the knob 60, when the user rotates the handle 61, the engaging projection 62 rotates the fixing groove 24, the shaft 20 is to be made the same rotation Thereafter, by rotating the latch 40 coupled to the extension part 22 of the shaft 20, the locking and releasing function of the door 2 is performed.

After the installation of the knob 60 is completed, the user inserts the flange 10 into the hole 3 formed in the opening / closing door 2 to maintain the step 11 in close contact with the opening / closing door 2, and then the flange When the packing 17 and the washer 18 are sequentially inserted from the rear of the 10 and the fastening nut 16 is fastened, the flange 10 is tightly fixed to the opening and closing door 2.

When the work of the flange 10 is completed, the user is coupled to the length adjusting means 50 in sequence to the extension portion 22 of the shaft 20, first insert the support plate 51 and then the elastic member 53 Is inserted into one end of the clasp 40 in the state in close contact with the support plate 51 and the fastening bolt 42 is fastened while the washer 43 inserted into the fastening bolt 42 supports the fastening bolt while supporting the bottom surface of the clasp 40. According to the fastening amount of 42, the clasp 40 is moved forward or backward in the vertical direction so that the adjustment of the length suitable for installation in the opening-closing door 2 is possible.

When the series of work processes as described above is completed, the user rotates the shaft 20 and the latch 40 while the engaging protrusion 62 rotates when the knob 61 of the knob 60 is changed from the vertical state to the horizontal direction. The protrusion 41 of the clasp 40 is to perform the locking and releasing function of the opening and closing door (2). At this time, the plurality of protrusions 52 of the support plate 51 is inserted while making a clicking sound to the guide groove 15 of the flange 10 while rotating as the clasp 40 so that the user can open and close the clasp 40 by rotating the door. You can recognize that (2) is kept locked.

By forming the protrusions 52 of the support plate 51 as described above, the locking device can be prevented in advance that the clasp 40 is rotated arbitrarily due to the impact or vibration to open the opening and closing door (2).

On the other hand, when the locking device is used for a certain time, the flange 10 is exploded in the related art when the internal pressure of the storage chamber 12 in which the flange 10 and the shaft 20 are continuously increased. However, in the present invention, when the internal pressure of the storage chamber 12 rises to prevent such an accident in advance, if the shaft 20 in close contact with the bottom surface of the snap ring 33 is applied in the vertical direction by the upper pressure. While the shaft 20 is rotated vertically by the elastic force of the pressure regulating member 30, the latch 40 coupled to the shaft 20 rotates and temporarily moves to the unlocked state in the locked state of the door 2. It will automatically restore the locked state again.

At this time, while the shaft 20 moves in the vertical direction, the pressure of the storage chamber 12 flows out, and at the same time, the spring 31 moves upward by the elastic force and the shaft 20 moves to its original position. Due to the increase in the internal pressure of 12) it is possible to prevent the accident that the flange 10 explodes in advance.

And, the length of the clasp 40 may vary in length depending on the fastening amount of the fastening bolts 42, in which the fastening bolts 42 are always elastically maintained by the elastic force of the elastic member (53) It can be.

5 is another embodiment of the present invention length adjustment means when the length of the clasp 40 to maintain the locked state in the opening and closing door (2) or finely adjusted when used to separate the spring 53 to support plate 51 ) And the clasp 40 can be used to directly contact or in some cases by using one or more washers 54 made of synthetic resin to the rear of the support plate 51 to adjust the fine length of the clasp 40 can be used. It is.

As described above, the present invention always maintains the constant pressure inside the flange of the locking device installed in the opening and closing door of the explosion-proof or non-explosion-proof case in which the electric device and various control devices are installed in petrochemical, heavy industry equipment, gas, refinery related factories and reservoirs. By forming an elastic member on the outer circumference of the shaft to install it in the storage compartment of the flange, it prevents the risk of an accident that an explosion caused by the pressure rise in the flange storage compartment, to prevent the risk of fire There is a devise.

This invention is an invention that has the effect of making it easy to handle and use the overall manufacturing process and installation can be easily performed.

The present invention has an advantage that the length of the clasp coupled to the shaft can be arbitrarily adjusted according to the fastening amount of the length adjusting means and the fastening bolt to easily and easily lock and unlock the door.

The present invention forms a plurality of protrusions on the upper portion of the support plate and guide grooves on the rear bottom surface of the flange so that the user can recognize the locking state and release state of the clasp from the outside to rotate the support plate from the locked state to the unlocked state. In this case, the projection is devised to produce a sound while leaving the guide groove so that the user can recognize the effect.

Claims (5)

A flange fixed to one side of the opening and closing door of the case having an explosion-proof or non-explosion-proof structure and having a hollow inside; A fastening nut having a synthetic washer at the front to be screwed to the outer circumference of the flange to fix the flange to the case; A shaft axially inserted into the flange, the rear end of the shaft being protruded outwardly and rotatable within the flange; A pressure regulating member formed at a front outer periphery of the shaft to move the shaft in an axial direction when an internal pressure of the flange rises; A snap ring which is in close contact with the upper part of the shaft to maintain the airtightness of the storage chamber and the outer periphery is fixed to the inner wall surface of the flange; One end is fixed to the rear end of the shaft by the fastening bolt and the other end is extended to one side to lock and unlock the opening and closing door of the case; A length adjusting means coupled to an upper part of the clasp so as to elastically support the clasp in the axial direction and to adjust the length of the clasp according to the fastening amount of the fastening bolt; And One end is coupled to the upper inner side of the shaft and the other end is a knob having a handle protruding outward so as to rotate the shaft and the latch at the same time; lock device installed on the opening and closing door of the case having an explosion-proof structure. 2. The flange of claim 1, wherein the flange is formed at the front of the casing to be in close contact with the front surface of the case and forms a storage compartment therein, and has an insertion hole open at the rear thereof, and a plurality of insertion grooves are formed at the top of the storage compartment to form a snap ring. Locking device is installed on the opening and closing door of the case having an explosion-proof structure characterized in that the fitting, and formed a plurality of guide grooves on the rear bottom surface of the flange. According to claim 1, wherein the shaft is maintained in the airtight inside the flange while the pressure adjusting member is fitted to the outer periphery of the body processed stepwise smaller than the upper outer diameter so that the pressure adjusting member does not escape to the top and the length adjusting means on the bottom of the body And an extension portion formed in a rectangular shape extending a predetermined length so that the clasp is fitted, the outer diameter of the extension portion is formed smaller than the outer diameter of the body, and the opening and closing door of the case having an explosion-proof structure, characterized in that the fastening bolt is fastened to the inside of the extension portion Locking device installed. According to claim 1, wherein the pressure adjusting member is made of a spring to be elastically fitted to the outer periphery of the body of the shaft and the washer made of a synthetic resin to prevent the noise generated as the spring rotates when the shaft and the spring rotates on the bottom of the spring Locking device is installed on the opening and closing door of the case having an explosion-proof structure, characterized in that formed. According to claim 1, wherein the length adjusting means is inserted into the support plate made of a plate body to form a plurality of projections on the upper portion of the support plate to be inserted into the guide groove of the flange, the elastic member is inserted into the bottom of the support plate elastic Locking device is installed on the opening and closing door of the case having an explosion-proof structure to elastically support the latch inserted into the bottom of the member in the vertical direction.