KR102312722B1 - Diaphragm vlave having key-lock structure - Google Patents

Abstract

The present invention discloses a diaphragm valve having a key-lock structure, comprising: a valve body (110) having a flow corresponding to corrosive gas or corrosive liquid flowing at one side; a sheet part (120) for passing a flow; a diaphragm sheet (130) for adjusting a flow by opening and closing a discharge path (115) of the valve body (110); a pressurization part (140) for elastically compressing or separating the diaphragm sheet (130); a bonnet (150) for guiding the ascent and descent of a stem (142); a handle (160) having the stem combined and fixed to a lower end thereof and having a keyhole formed in the middle to penetrate; a first knob (170) having a lower end thereof connected to the upper end of the bonnet (150), having an upper end thereof drawn inside the handle and having an internal gear formed on an inner side surface; a key-lock part (180) toothing with the inner gear (171) of the first knob (170) to restrict the rotation of the handle (160); and a master key (190) inserted into a keyhole (161), pressurizing the rear end of a stopper (182) and rotating the stopper (182) to separate the stopper (182) from the inner gear (171) of the first knob (170), thereby enabling the rotation of the handle (160). Accordingly, the handle (160) is rotated by inserting the master key (190) into the keyhole (161), thereby preventing accidents caused by arbitrary manipulation or human errors.

Description

Diaphragm valve with key lock structure {DIAPHRAGM VLAVE HAVING KEY-LOCK STRUCTURE}

The present invention provides a key lock structure that allows the handle to be rotated only when the key lock part of the master key is inserted, thereby preventing corrosive gas or corrosive liquid leakage accidents due to human error due to negligence due to arbitrary operation other than the person in charge or the mistake of field workers. It relates to a diaphragm valve having a.

As is well known, in the case of a diaphragm valve that is currently commercially available, it is widely used in processes requiring dust protection in the semiconductor, display, or chemical industries.

However, when flowing corrosive fluids and gases, a dead zone is formed due to a vortex phenomenon, which prevents smooth flow, thereby reducing the flow rate and corroding the diaphragm valve in the stagnation section, thereby reducing the lifespan.

On the other hand, as a prior art related thereto, Korean Patent Publication No. 10-1266301 is disclosed. In the conventional device for preventing the handle loosening of a diaphragm valve, when the valve of the diaphragm valve is opened, the locking pin embedded in the handle is of the spring. It is locked firmly by being caught in the valve opening and fixing hole of the locking bracket by resilient force, and when the valve is closed, the locking pin embedded in the handle is caught and locked in the valve closing fixing hole of the locking bracket by the elastic force of the spring, Although it prevents the handle from being released in the valve open state or the valve closed state, there is a problem in that it is a device for simply removing the handle and does not play a role in preventing arbitrary manipulation of the valve.

In addition, the locking type diaphragm valve of Korean Patent Registration No. 10-1708756 has improved product safety by selectively restraining the locking state of the handle part depending on whether the locking pin is inserted or not. It is a valve that can be operated easily by anyone with a structure that can be operated, and there is a problem that it cannot be locked when the flow rate is adjusted.

In addition, the ball valve having a key lock handle for flow control of Korean Patent Registration No. 10-2017-0077089 has a fluid inlet passage, a fluid outlet passage, a body in which a recessed portion opened through the top is installed, and the circumference of the fluid inlet passage formed in the body. A thin elastically deformable diaphragm that opens and closes the fluid inflow passage by being pressed and spaced apart from the seat and the sheet disposed on the edge, a press adapter that holds the outer peripheral edge of the diaphragm between the concave bottom of the body, and the diaphragm that presses the center of the diaphragm Although it is possible to increase the airtightness of the valve by providing a vertical movement means for vertically moving the press and the diaphragm press, there is a limitation in that a dead zone occurs.

Accordingly, there is a need for a technology capable of preventing industrial accidents due to leakage of corrosive gas or corrosive liquid due to unintentional opening of the diaphragm valve due to human error due to arbitrary operation or human error.

Korean Patent Publication No. 10-1266301 (diaphragm valve handle loosening prevention device, 2013.05.22) Korean Patent Publication No. 10-1708756 (Locking type diaphragm valve, 2017.02.21) Korean Patent Publication No. 10-2017-0077089 (Ball valve with key lock handle for flow control, 2017.06.19)

The technical problem to be achieved by the idea of the present invention is to rotate the handle only when the key lock part of the master key is inserted, so that corrosive gas or corrosive liquid leaks due to human error due to negligence caused by arbitrary manipulation other than the person in charge or the mistake of field workers It is to provide a diaphragm valve having a key lock structure that can prevent accidents.

In order to achieve the above object, the present invention, an inlet formed so that the flow rate corresponding to the corrosive gas or corrosive liquid flows in the first horizontal direction on one side, and the outlet formed so that the flow rate is discharged in the second horizontal direction on the other side, and, A valve body, comprising: an inflow path formed in a vertical direction from the inlet to the inner region of the intermittent space formed at the upper center of the intermittent space; A sheet having a first communication hole formed in the center to communicate with the discharge path and through which a flow rate passes, a coupling hole is formed in the center to hold the sheet, and second communication holes are equally spaced on the circumference to correspond to the inflow path. Consisting of a seat holder arranged in a sheet portion; a disc-shaped diaphragm sheet formed on the upper end of the sheet portion inside the intermittent space and closely contacting or spaced apart from the upper end of the second communication hole to open and close the discharge path to control the flow rate; a push button in contact with the upper center of the diaphragm seat, and a stem formed on the upper end of the push button to vertically elevate and elastically compress or space the diaphragm seat by the push button; a bonnet for guiding the elevation of the stem; a handle having the stem fixedly coupled to the lower end and having a key hole in the center thereof; a first knob having a lower end coupled to the upper end of the bonnet and having an upper end inserted into the handle and having an internal gear formed on an inner side thereof; A second knob coupled to the lower end of the handle in a cylindrical shape, a keyhole is formed through, and a vertical cutout space is formed on one side thereof, and is rotatably formed on a rotation shaft formed in the cutout space, and the internal gear of the first knob A stopper for intermittent rotation of the handle by engaging with the stopper, a support extending from one lower end of the stopper, coupled to the rotation shaft and elastically pressurizing the support so that the front end of the stopper is inscribed with the first knob A key lock unit comprising a torsion spring that meshes with a gear to limit rotation of the handle; and a master key inserted into the keyhole and pressing the rear end of the stopper to rotate the stopper so that the stopper is spaced apart from the internal gear of the first knob to enable rotation of the handle. Provided is a diaphragm valve having a key lock structure, which rotates the handle by inserting the key hole of a key to compress or space the diaphragm seat by the push button to adjust the flow rate flowing through the valve body.

Here, the master key is composed of a handle and a key having an arc-shaped cross-section that is formed at the lower end of the handle and is introduced into the key hole of the handle and the key hole of the second knob, and a fixing groove is indented at the upper end of the key. The key hole of the handle is formed to have the same size as the key, and the key hole of the second knob is formed to extend relatively larger than the key, and when the key is rotated, the fixing groove of the key is formed with the handle. can be fixed to the top surface of the

In addition, inclined surfaces may protrude to support the torsion spring in the inner region of both inner surfaces of the cutout space, and support surfaces for supporting the support may be protruded in the outer regions of both inner surfaces of the cutout space.

In addition, the front end of the stopper may be formed in a gear shape of a single dimension corresponding to the internal gear of the first knob to engage.

In addition, a screw thread is formed on the outer circumferential surface of the stem, and a screw thread is formed on the inner surface of the bonnet to correspond to the screw thread, so that the stem can be screwed up and down by rotation of the handle.

In addition, a fastening ring is extended on the outer peripheral surface of the lower end of the bonnet, a screw thread is formed outside the intermittent space of the valve body, a coupling groove to which the fastening ring is coupled is formed on the upper inner surface, and the intermittent space is formed on the lower inner surface It may further include a bonnet nut having a thread corresponding to the thread of the bonnet and screwed to the valve body to fix the bonnet and the valve body.

In addition, the sheet is composed of PCTFE, the seat holder is composed of a suspension, the coupling hole of the seat holder is formed in a step, and the sheet is formed in a step corresponding to the coupling hole shape of the sheet holder, The seat and the seat holder may be coupled to each other in a detachable manner.

In addition, the upper edge of the sheet is formed to protrude from the seat holder to a predetermined height, the outer edge of the seat holder is formed to protrude a partition to a predetermined height, and the edge of the diaphragm sheet is coupled to the partition wall so as to be in close contact with the dead zone. can be minimized.

In addition, the edge of the diaphragm sheet may be fixed by the partition wall and the lower edge of the bonnet to prevent leakage of corrosive gas or corrosive liquid.

In addition, the diaphragm sheet may be laminated in a double structure.

In addition, an O-ring may be formed on the outer peripheral surface of the stem in close contact with the inner surface of the bonnet.

In addition, a guide groove is formed at the lower end of the handle, and a guide is formed on an outer surface of the lower end of the first knob to correspond to the guide groove, so that the handle can rotate 180° forward and reverse.

In addition, grips may be radially and symmetrically spaced apart from the outer circumferential surface of the handle.

According to the present invention, since the handle is rotated only when the key lock part of the master key is inserted, it is possible to prevent a corrosive gas or corrosive liquid leakage accident due to human error due to negligence caused by an arbitrary operation other than the person in charge or a mistake of a field worker. there is

1 is a perspective view of a diaphragm valve having a key lock structure according to an embodiment of the present invention.
2 and 3 respectively show a cross-sectional structure of the diaphragm valve having the key lock structure of FIG. 1 .
4 to 6 are respectively exploded perspective views of the diaphragm valve having the key lock structure of FIG. 1 .
7 to 9 are views showing the main components related to the key lock of the diaphragm valve having the key lock structure of FIG. 1 in isolation.
FIG. 10 is a separate view showing the main configuration related to the diaphragm seat of the diaphragm valve having the key lock structure of FIG. 1 .
11 is a plan view of a cross-sectional structure of the diaphragm valve having the key lock structure of FIG. 1, respectively.
FIG. 12 is a partially cutaway view of the valve body of the diaphragm valve having the key lock structure of FIG. 1 .
13 is an enlarged view of the seat portion of the diaphragm valve having the key lock structure of FIG. 1 .
14 is a comparative example of the experimental results of the size of the dead zone by the structure of the seat portion of FIG. 13 .

Hereinafter, embodiments of the present invention having the above-described characteristics will be described in more detail with reference to the accompanying drawings.

The diaphragm valve having a key lock structure according to an embodiment of the present invention, as a whole, includes a valve body 110 through which a flow rate corresponding to a corrosive gas or a corrosive liquid flows on one side, and a seat portion 120 through which the flow rate passes, The diaphragm seat 130 for controlling the flow rate by opening and closing the discharge path 115 of the valve body 110, the pressing part 140 for elastically compressing or spacing the diaphragm seat 130, and the stem 142 A bonnet 150 for guiding the elevation, a handle 160 having a stem 142 fixedly coupled to the lower end and having a key hole 161 penetrating in the center, a lower end coupled to the upper end of the bonnet 150, and a handle 160 at the upper end ) The first knob 170, which is inserted into the inner side, the internal gear 171 is formed on the inner surface, and the key lock part ( 180) and the keyhole 161 to press the rear end of the stopper 182 to rotate the stopper 182 so that the stopper 182 is spaced apart from the internal gear 171 of the first knob 170, so that the handle ( Including the master key 190, which enables the rotation of 160), the handle 160 is rotated by the insertion of the keyhole 161 of the master key 190 to prevent accidents caused by arbitrary manipulation or human error. make the point

Hereinafter, with reference to FIGS. 1 to 14 , a diaphragm valve having the above-described key lock structure will be described in detail as follows.

First, the valve body 110, as shown in FIGS. 1 to 3, an inlet 111 formed so that a flow rate corresponding to a corrosive gas or a corrosive liquid flows in a first horizontal direction on one side, and the other side an outlet 112 formed so that the flow rate is discharged in the second horizontal direction, and the inlet formed in a vertical direction by communicating with the inner region of the intermittent space 113 (see FIG. 10) formed at the upper center of the inlet 111 A flow of corrosive gas or corrosive liquid flowing through the semiconductor or display process line, composed of a furnace 114 and a discharge path 115 formed in a vertical direction in communication with the outlet 112 from the central region of the intermittent space 113 . to control the flow rate.

Next, the seat portion 120 guides the flow rate flowing in and discharged into the valve body 110 to flow smoothly without remaining in the intermittent space 113 and minimizes the size of the dead zone to prevent the occurrence of a vortex phenomenon. It is composed of a seat 121 and a seat holder 122 for preventing valve leakage to perform a role of suppressing, specifically, as shown in FIGS. 2 to 7, the discharge path ( 115) and the first communication hole (121a) aligned to communicate in the vertical direction is formed in the center, and the sheet 121 through which the flow rate passes, and the sheet 121 is introduced into the coupling hole in the center to hold the sheet 121 The second communication holes 122b arranged in a vertical direction on the circumference to correspond to the inflow path 114 are formed and the seat holders 122 are arranged at equal intervals.

On the other hand, the sheet 121 is composed of PCTFE (PolyChloroTriFluoroEthylene), which is a polymer that maintains heat resistance even at 120 ° C., and the seat holder 122 is composed of a sus. Also, as shown in enlarged view in FIGS. 5 and 6 , the coupling hole 122a of the seat holder 122 is formed with a step difference, and the sheet 121 has a coupling hole 122a shape of the seat holder 122 . Formed corresponding to the step difference, the sheet 121 and the seat holder 122 are configured to be coupled to each other in a separate type, compared to the conventional one-piece structure, the sheet 121 when replacing parts due to damage to the sheet 121 in a separate type ) to replace only the replacement cost can be reduced.

Then, the diaphragm sheet (diaphragm sheet) 130 is. As shown in FIGS. 10 and 13, it is formed in the form of a disk having an arc-shaped cross-sectional structure, and specifically, as shown in FIGS. 2 to 7, the upper end of the sheet part 120 inside the intermittent space 113 as shown in FIGS. is formed in the central region to close the second communication hole 122b by being in close contact with the upper end of the second communication hole 122b or to open and close the second communication hole 122b and to open the discharge path 115 spaced apart from each other. To adjust the flow rate passing through the valve body (110).

On the other hand, as shown in FIGS. 5 and 13 , the upper edge 121b of the sheet 121 is formed to protrude from the seat holder 122 at a predetermined height, and when the diaphragm sheet 130 is compressed, the upper edge 121b and In order to close the second communication hole 122b by prior contact, the partition wall 122c is formed to protrude to a predetermined height on the outer edge of the seat holder 122, and the edge of the diaphragm sheet 130 is on the partition wall 122c. The size of the dead zone can be minimized compared to the prior art by being coupled to be in close contact.

Accordingly, according to the comparative example of the experimental result of the size of the dead zone by the seat structure of FIG. 14 and the following [Table 1], the size of the dead zone inside the diaphragm valve is reduced and the occurrence of vortex is greatly suppressed, so that the flow coefficient (Cv) ) to realize a 10% flow rate increase and to improve durability by minimizing corrosion.

conventionally Example Deadzone size 91.13mm ² 21.74mm ² Flow coefficient (Cv) 0.3 0.33

Here, the edge of the diaphragm sheet 130 is fixed by the lower edge of the partition wall and the bonnet 150 to prevent external leakage of corrosive gas or corrosive liquid, thereby preventing a safety accident. Similarly, since the diaphragm sheet 130 is laminated in a double structure, fatigue due to elastic compression and compression release of the diaphragm sheet 130 can be improved compared to a single structure.

Next, the pressing part 140 is formed on the upper end of the diaphragm sheet 130 to elastically push the diaphragm sheet 130 . Specifically, as shown in FIGS. 2 to 7 , the center of the diaphragm sheet 130 . The push button 141 in contact with the upper end is formed on the upper end of the push button 141 and ascends and descends in the vertical direction to elastically press the diaphragm sheet 130 by the push button 141 to compress or separate the press state. It consists of a stem (142) to release.

Here, as shown in an enlarged view in FIG. 13 , the front end of the push button 141 in contact with the central region of the diaphragm sheet 130 is convexly formed to press the central region of the diaphragm sheet 130 to press the push button 141 . ), the central region of the diaphragm sheet 130 may be convexly deformed to close the first communication hole 121a in an airtight or watertight manner.

Next, the bonnet 150 guides the elevation of the stem 142 . For example, as shown in FIGS. 2 to 7, a screw thread 142a is formed on the outer circumferential surface of the stem 142, and a screw thread 151 is formed on the inner surface of the bonnet 150 to correspond to the screw thread 142a. , the stem 142 and the bonnet 150 are screwed to each other, and the stem 142 is screw-rotated by the rotation of the handle 160 to elevate.

On the other hand, a fastening ring 152 is extended on the lower outer peripheral surface of the bonnet 150, a screw thread 116 is formed outside the intermittent space 113 of the valve body 110, and a fastening ring 152 is formed on the upper inner surface. A coupling groove 201 to be coupled is formed, and a screw thread 202 is formed on the inner surface of the lower end to correspond to the screw thread 116 of the intermittent space 113, and is screwed to the valve body 110 to be screwed into the bonnet 150 and the valve. It may further include a bonnet nut 200 for fixing the body 110 to each other.

In addition, referring to FIG. 13 , an O-ring 153 is formed on the outer peripheral surface of the stem 142 in close contact with the inner surface of the bonnet 150 , so as to block the flow rate that may flow out of the intermittent space 113 , or to be watertight

Next, the handle 160 is fixed by screwing the upper end of the stem 142 through the second knob 181 of the key lock 180 to the lower end, as shown in FIGS. 5, 6 and 9 . A key hole 161 into which the master key 190 is inserted is formed through the coupling, in the center of the upper surface.

Meanwhile, referring to FIGS. 6 and 11 , a guide groove 162 is formed at the lower end of the handle 160 , and a guide 172 is formed on the lower outer surface of the first knob 170 to correspond to the guide groove 162 . is formed, so that the handle 160 rotates 180° forward and reverse to prevent damage to the seat 121 or the diaphragm seat 130 due to excessive rotation of the handle 160 .

In addition, referring to FIG. 1 , grips 163 having a wrinkled structure are radially and symmetrically spaced apart from each other on the outer circumferential surface of the handle 160 so that they can be rotated stably without slipping.

Next, as shown in FIGS. 2, 3, 5, 6 and 9, the first knob 170 is fixedly coupled to the upper outer peripheral surface of the bonnet 150 and the upper end is the handle 160 ) is inserted between the inner surface and the outer surface of the second knob 181 , and the internal gear 171 is arranged in a cylindrical shape on the inner surface.

That is, the bonnet 150 and the second knob 181 are fixedly coupled to each other, and the handle 160 is rotatably coupled to the outer surface of the second knob 181 , and referring to FIGS. 2, 3 and 5 , , the second knob 181 is screwed to the handle 160 and fixed to each other, so that when the handle 160 rotates, the second knob 181 and the pressing unit 140 work together to rotate.

Next, the key-lock member 180 is configured to rotate the handle 160 only when the master key 190 is used by limiting the rotation of the handle 160 , specifically, FIGS. 5 to 9 . As shown in Fig., the second knob 181 is coupled to the lower end of the handle 160 in a cylindrical shape, a key hole 181a is formed through, and a cut-out space 181b is formed in the vertical direction on one side toward the center. , is formed so as to be rotatable on the rotation shaft 182b introduced into the hole 182a penetrated on both sides of the cutout space 181b so that the front end engages with the internal gear 171 of the first knob 170 to engage the handle 160 ), a stopper 182 intermittently intermittently rotating, a support 183 extending in both directions from the lower end of one side of the stopper 182, coupled to the rotation shaft 182b and elastically pressing the support 183 to the stopper ( 182) is meshed with the internal gear 171 of the first knob 170 to limit the rotation of the handle 160 by the mutual engagement between the first knob 170 and the stopper 182 (torsion spring) spring) (184).

On the other hand, referring to FIGS. 3 and 8 , an inclined surface 181b-1 is protruded to support the rear end of the torsion spring 184 in the inner region of both inner surfaces of the cutout space 181b, so that the torsion spring 184 is formed. It is fixed to elastically return after being pressed by the key 192 of the stopper 182, and in the outer region of both inner surfaces of the cutout space 181b, the support surfaces 181b- that support both ends of the support 183, respectively. 2) is formed to protrude to limit excessive rotation of the stopper 182 by the elastic force of the torsion spring 184 .

In addition, referring to FIGS. 8 and 9 , the front end of the stopper 182 is formed to protrude into a gear shape of a single dimension corresponding to the internal gear 171 of the first knob 170 to stably engage the handle 160 . to limit the unexpected rotation of

Next, as shown in FIGS. 5, 7 and 9, the master key 190 is inserted into the key hole 161 of the handle 160 and is drawn up to the key hole 181a of the key lock unit 180, and is inserted into the cutout space. By pressing the rear end of the stopper 182 exposed to the keyhole 181a through the 181b, the stopper 182 is rotated about the rotation shaft 182b so that the front end of the stopper 182 is the first knob 170 . It is spaced apart from the internal gear 171 to release the meshing state between the first knob 170 and the stopper 182 to enable rotation of the handle 160 .

Specifically, referring to FIG. 7 , the master key 190 includes a handle 191 and a keyhole 161 of the handle 160 and a keyhole of the second knob 181 extending from the lower end of the handle 191 ( 181a) is composed of a key 192 having an arc-shaped cross-sectional structure of 180°, and a fixing groove 193 is formed by indenting in an arc shape of 90° at the upper end of the key 192, as shown in FIG. For reference, the keyhole 161 of the handle 160 is cut in an arc shape of 180° which is the same size as the key 192, and the keyhole 181a of the second knob 181 is 225° larger than the key. It extends in the arc shape of the incision and is formed, and when the key 192 is rotated, the fixing groove ( 193 may be fixed to the top surface of the handle 160 .

That is, after inserting the master key 190 into the key lock unit 180 and rotating it, the stopper 182 is continuously pressed while being fixed to the handle 160 without being separated from the first knob 170 and the stopper 182 . By releasing the meshing state, the handle 160 can be freely rotated while the master key 190 is inserted into the key lock unit 180 .

Therefore, by the configuration of the diaphragm valve having the key lock structure as described above, the handle is rotated only when the key lock part of the master key is inserted, thereby preventing human error due to negligence caused by arbitrary operation other than the person in charge or the mistake of field workers. It can prevent leakage of corrosive gas or corrosive liquid by

The embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations.

110: valve body 111: inlet
112: outlet 113: intermittent space
114: inflow path 115: discharge path
116: thread 120: seat portion
121: seat 122: seat holder
130: diaphragm sheet 140: pressing part
141: push button 142: stem
150: bonnet 151: thread
152: fastening ring 153: O-ring
160: handle 161: keyhole
162: guide groove 163: grip
170: first knob 171: internal gear
172: guide 180: key lock
181: second knob 182: stopper
183: support 184: torsion spring
190: master key 191: handle
192: key 193: fixing groove
200: bonnet nut 201: coupling groove
202: thread

Claims (13)

An inlet formed on one side so that a flow rate corresponding to a corrosive gas or corrosive liquid flows in a first horizontal direction, an outlet formed on the other side so that a flow rate is discharged in a second horizontal direction, and an internal region of an intermittent space formed at the upper end of the center from the inlet a valve body, comprising: an inlet in communication with a vertical direction and an outlet in communication with the outlet from the central region of the intermittent space and formed in a vertical direction;
A sheet having a first communication hole formed in the center to communicate with the discharge path and through which a flow rate passes, a coupling hole is formed in the center to hold the sheet, and second communication holes are equally spaced on the circumference to correspond to the inflow path. Consisting of a seat holder arranged in a sheet portion;
a disc-shaped diaphragm sheet formed on the upper end of the sheet portion inside the intermittent space and closely contacting or spaced apart from the upper end of the second communication hole to open and close the discharge path to control the flow rate;
a push button in contact with the upper center of the diaphragm sheet, and a stem formed on the upper end of the push button to vertically elevate and elastically compress or space the diaphragm sheet by the push button;
a bonnet for guiding the elevation of the stem;
a handle having the stem fixedly coupled to the lower end and having a key hole in the center thereof;
a first knob having a lower end coupled to the upper end of the bonnet and having an upper end inserted into the handle and having an internal gear formed on an inner side thereof;
A second knob coupled to the lower end of the handle in a cylindrical shape, a keyhole is formed through, and a vertical cutout space is formed on one side thereof, and is rotatably formed on a rotation shaft formed in the cutout space, and the internal gear of the first knob A stopper for intermittent rotation of the handle by engaging with a stopper, a support extending from one lower end of the stopper, coupled to the rotation shaft and elastically pressing the support to make the front end of the stopper inscribed with the first knob A key lock unit comprising a torsion spring that meshes with a gear to limit rotation of the handle; and
A master key inserted into the keyhole to press the rear end of the stopper to rotate the stopper so that the stopper is spaced apart from the internal gear of the first knob to enable rotation of the handle.
A diaphragm valve having a key lock structure, which rotates the handle by inserting the keyhole of the master key to compress or space the diaphragm seat by the push button to adjust the flow rate flowing through the valve body.
According to claim 1,
The master key includes a handle and a key having an arc-shaped cross-section that is formed at the lower end of the handle and is inserted into the key hole of the handle and the key hole of the second knob, and a fixing groove is formed inside the upper end of the key. become,
The key hole of the handle is formed to have the same size as the key, and the key hole of the second knob is formed to extend relatively larger than the key. Diaphragm valve having a key lock structure, characterized in that it is fixed.
According to claim 1,
In the inner region of both inner surfaces of the cutout space, inclined surfaces are formed to protrude to support the torsion spring,
A diaphragm valve having a key lock structure, characterized in that a support surface for supporting the support is formed to protrude from an outer region of both inner surfaces of the incision space.
According to claim 1,
The front end of the stopper is formed in a gear shape of a single dimension corresponding to the internal gear of the first knob and meshed with each other, the diaphragm valve having a key lock structure.
According to claim 1,
A diaphragm having a key lock structure, characterized in that a screw thread is formed on the outer circumferential surface of the stem, and a screw thread is formed on the inner surface of the bonnet corresponding to the screw thread, and the stem is screwed and lifted by rotation of the handle. valve.
6. The method of claim 5,
A fastening ring is extended on the outer peripheral surface of the lower end of the bonnet, and a thread is formed outside the intermittent space of the valve body,
A bonnet nut having a coupling groove in which the fastening ring is coupled to the upper inner surface is formed, and a screw thread corresponding to the thread of the intermittent space is formed on the lower inner surface, and is screwed to the valve body to fix the bonnet and the valve body. Diaphragm valve having a key lock structure, characterized in that it further comprises.
According to claim 1,
The sheet is composed of PCTFE, the seat holder is composed of a suspension, the coupling hole of the seat holder is formed in a step, and the sheet is formed in a step corresponding to the shape of the coupling hole of the sheet holder, and the sheet and The seat holder is a diaphragm valve having a key lock structure, characterized in that coupled to each other in a separate type.
8. The method of claim 7,
The upper edge of the sheet is formed to protrude from the seat holder at a predetermined height, the outer edge of the seat holder has a partition wall protruded to a predetermined height, and the edge of the diaphragm sheet is coupled to closely contact the partition wall to minimize a dead zone A diaphragm valve having a key lock structure, characterized in that.
9. The method of claim 8,
An edge of the diaphragm seat is fixed by the partition wall and the lower edge of the bonnet to prevent leakage of corrosive gas or corrosive liquid, the diaphragm valve having a key lock structure.
According to claim 1,
The diaphragm seat is a diaphragm valve having a key lock structure, characterized in that the dual structure is laminated.
According to claim 1,
A diaphragm valve having a key lock structure, characterized in that an O-ring is formed on the outer peripheral surface of the stem in close contact with the inner surface of the bonnet.
According to claim 1,
A guide groove is formed at the lower end of the handle, and a guide is formed on the outer surface of the lower end of the first knob to correspond to the guide groove, so that the handle rotates 180° forward and reverse. diaphragm valve.
13. The method of claim 12,
A diaphragm valve having a key lock structure, characterized in that grips are radially and symmetrically spaced apart from each other on the outer circumferential surface of the handle.

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