KR102139166B1 - Globe valve - Google Patents

Abstract

Disclosed is a globe valve comprising: a valve body having an inner space that is a flow path; a seat installed on one side of the inner space of the valve body; a sealing case having a communication hole formed on one side thereof and installed in the inner space of the valve body spaced apart from the seat to partition the inner space; a stem having the set length, installed through the communication hole inside the sealing case, and performing a linear motion according to a control device; a valve plug installed at an end of the stem to be seated on or separated from the seat according to the linear motion of the stem, and to open and close the movement path of the fluid; bellows installed to surround the stem inside the sealing case to assist in the linear motion of the stem; and a glass lining formed along the inner surface of the valve body.

Description

Globe valve {GLOBE VALVE}

The present technology relates to a globe valve.

In particular, it relates to a globe valve that can protect the valve body from fluid, including glass lining, and prevent damage to the bellows by disposing the bellows in the sealing case.

In general, a valve is a device that controls the flow rate, flow rate, and pressure of a fluid flowing through a tube. Valves can be classified into several types depending on the purpose. Among them, the globe valve is used in various industries because it can be used not only to control the flow rate but also to block the flow rate. It is widely used in power plants, such as thermal power generation and cogeneration.

The globe valve is generally installed on the valve body constituting the exterior of the valve, the stem that moves up and down within the valve body, and the valve plug that moves up and down together with the stem and around the stem. It consists of a bellows to assist the movement of the stem, and a lining to protect the valve body from fluid.

In the globe valve formed in such a configuration, the valve plug is seated on the seat by the movement of the stem to close the flow path to prevent fluid movement, or the valve plug is released from the seat to open the flow path to allow fluid movement. The fluid is moved in one direction so that the fluid is supplied.

However, in the glove valve, the lining is peeled off by the fluid or a hole is generated, and the fluid comes into contact with the glove valve, causing the valve body to corrode or flow out with the fluid, affecting the purity of the fluid. There was a problem in which damage was caused, and fluid was leaked to the side where the stem was installed rather than the intended flow path, resulting in personal injury and property damage.

Therefore, in the industry, there is an increasing need for a globe valve that does not cause the above problems.

Republic of Korea Patent Registration No. 1934042 "Glove valve with swing type disc"

The present invention, created to solve the above-mentioned problems, aims to provide a globe valve in which lining does not react or peel off by a fluid.

In addition, an object of the present invention is to provide a glove valve with improved durability because the bellows are not broken from the fluid.

In addition, an object of the present invention is to provide a globe valve with increased safety because the fluid does not flow to the side where the stem is installed.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description. will be.

The present invention globe valve is a valve body having an inner space which is a flow path; A seat installed on one side of the interior space of the valve body; A sealing case in which a communication hole is formed at one side, and is installed in an inner space of the valve body spaced apart from the seat to partition the inner space; A stem having a set length and installed through the communication hole inside the sealing case and performing a linear motion according to a control device; A valve plug installed at an end of the stem to seat or leave the seat according to the linear movement of the stem and to open and close the movement path of the fluid; It includes a bellows installed around the stem inside the sealing case to assist the linear movement of the stem and a glass lining formed along the inner surface of the valve body.

Here, the glass lining is performed by performing a ground coating process of grinding the glass powder to a thickness of 0.3 mm to 0.4 mm by dispersing the glass powder to the inside surface of the valve body to a thickness of 1 mm, heating, cooling and grounding for a predetermined time, Spread the glass powder back to the surface of the ground-coated glass to a thickness of 1 mm, heat it up, cool it for a set time, and ground to repeat the process to increase the thickness to about 0.3 to 0.4 mm.The coating thickness of the valve body by the glass powder It is characterized in that it is repeated 5 or more times so that it is formed between a thickness of 1.3 mm to 2.7 mm.

Here, the valve body is provided with an installation groove formed in a shape recessed from inside to outside along the circumferential direction and an installation protrusion protruding in one direction from the installation groove, and the sealing case includes a flange protruding along the circumferential direction and the It is characterized in that a fixing groove of a recessed shape is formed in the flange, the flange is disposed in the installation groove of the valve body, and the installation protrusion is fitted into the fixing groove so that the sealing case is fixed to the valve body.

Here, the sealing case is characterized in that an O-ring groove is formed at a predetermined interval along the periphery of the communication hole, and an O-ring is installed in the O-ring groove so that fluid does not move into the sealing case.

Here, the stem includes an extension having a size larger than the size of the communication hole of the sealing case, and an upper stem that moves without invading the communication hole and a connection protrusion having a size corresponding to the communication hole are formed to form the upper part. The connection protrusion is disposed inside the stem and is connected to the upper stem and includes a lower stem that moves through the communication hole and is disposed in the inner space of the valve body to move according to the movement of the upper stem.

Here, the upper portion of the seat includes a flat portion of a flat shape and an inclined portion connected to the flat portion to be inclined toward one direction, and the valve plug is installed at a lower portion of the lower stem, but is formed with the inclined portion formed in the seat along the circumference. When the valve plug is seated on the seat, the contact portion is in close contact with the inclined portion by connecting the inclined contact portion and the contact portion in a corresponding shape, but protruding along the radial direction so that the lower surface includes a flat shape blocking portion. The mill is characterized in that the blocking portion is in close contact with the inclined portion to close the hole formed in the center of the sheet.

Here, the seat is seated on the valve body, it is characterized in that the recessed filter groove is formed toward the inside on the portion of the lower surface of the seat not in contact with the valve body.

Here, a filter is installed on the seat, and the filter extends toward one direction. The filter includes a leg including a bent portion bent toward one direction at a vertical portion and an end portion of the vertical portion, and a filter for filtering foreign substances connected at the other end of the leg. When the filter including the portion is fitted into the filter groove, the vertical portion contacts the inner surface of the filter groove and is fixed to the filter groove by the elasticity of the bent portion.

Here, between the communication hole and the bellows is characterized in that the liquid sensor is installed to detect whether the fluid has been moved to the sealing case through the communication hole.

Here, a temperature sensor for sensing the temperature of the fluid is installed inside the lower stem, and the power line of the temperature sensing sensor penetrates the upper stem from the inside of the lower stem and is carried out to the outside, and is upward from the communication hole. It characterized in that the fluid sensing sensor for measuring the presence of the fluid is installed on the side wall of the sealing case in a position corresponding to the bellows spaced apart.

The lining of the glove valve of the present invention is formed of an inert glass, and does not react with the fluid and is not easily peeled off due to the pressure of the fluid.

In addition, the globe valve according to the present invention is provided with a sealing case that partitions the inner space of the valve body on the stem side, and by installing a bellows therein, the bellows does not come into contact with the fluid to prevent damage to the bellows and the fluid does not leak. Safety can be achieved.

Figure 1 shows a cross-section of the present invention globe valve.
Figure 2 is an enlarged view of the seat and valve plug of the present invention globe valve.
Figure 3 is an enlarged view of the sealing case of the present invention globe valve.
Figure 4 is an enlarged view of the top of the present invention globe valve.
5 shows the glass lining of the present invention globe valve.
Fig. 6(a) shows a side view of the filter of the present invention globe valve, and Fig. 6(b) shows a perspective view of the filter of the present invention globe valve.
Figure 7 shows a cross section of the upper stem and the lower stem and bolt of the present invention globe valve.

Hereinafter, an embodiment of the present invention will be described in detail through exemplary drawings. However, it is not intended to limit the scope of the present invention.

It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible, even if they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known configurations or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

In addition, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms specifically defined in consideration of the configuration and operation of the present invention are only for describing the embodiments of the present invention, and do not limit the scope of the present invention.

Figure 1 shows a cross-section of the present invention globe valve.

The inventor globe valve includes a valve body 100, a sealing case 300, a stem 400, a bellows 600, a seat 200, a valve plug 500 and a glass lining 700. In addition, the present invention may further include a filter 800.

The valve body 100 is configured to form an exterior, and an internal space 110 is formed inside. The inner space 110 is a seat 200, a sealing case 300, a stem 400, a valve plug 500, and the like, and is a movable space, and is a flow path through which fluid can be moved.

The valve body 100 is formed with an inflow passage through which fluid flows on one side, and an outflow passage through which fluid flows out on the other side, between the inflow passage (lower left in FIG. 1) and the outflow passage (lower right in FIG. 1). In the valve plug 500, an intermediate passage (a central portion in FIG. 1) in which a flow path is opened and closed according to whether the seat 200 is seated is formed. Since the globe valve of the present invention moves the set amount of fluid to the outlet passage, the intermediate passage is opened and closed by the operation of the seat 200 and the valve plug 500 in the intermediate passage so that only the set amount of fluid is discharged to the outlet passage. .

Figure 3 is an enlarged view of the sealing case of the present invention globe valve.

Figure 4 is an enlarged view of the top of the present invention globe valve.

The sealing case 300 is installed in the inner space 110 of the valve body 100 to partition the inner space 110.

The sealing case 300 is formed with holes having a set shape from the upper side to the lower side, and a communication hole 310 having a size smaller than the size of the hole is formed in the longitudinal direction. That is, the sealing case 300 is formed with a hole (hole and communication hole 310) communicating from the upper side to the lower side and communicating along the longitudinal direction. However, even though the space divided by the inner space 110 and the sealing case 300 of the valve body 100 communicates with each other through the communication hole 310, it is located in the valve body 100 through the communication hole 310. The fluid may be sealed in an area communicated by an O-ring installed in an O-ring groove 320 that is formed to be spaced apart along the longitudinal direction of the stem 400 and the communication hole 310 disposed in the communication hole 310. Accordingly, fluid is not drawn into the inner space 110 of the valve body 100 partitioned by the sealing case 300. When the bellows 600 is installed in a space where no fluid is introduced, the bellows 600 is installed in a place where the fluid does not come in contact, so that it is not damaged by the fluid.

However, if one fluid is moved to the space partitioned by the sealing case 300, serious damage may occur due to the outflow of the fluid, so a configuration for detecting the outflow of another fluid is required. For this reason, a liquid detection sensor 920 is installed on the inner sidewall of the sealing case 300. The liquid phase sensor 920 detects whether the fluid moving along the sealed communication hole 310 according to the operation of the stem 400 flows in. It detects whether or not the fluid is leaking.

In addition, the sealing case 300 needs to be stably fixed to the valve body 100 to prevent fluid from entering the space. The sealing case 300 is fixed to the valve body 100 through a combination of a groove and a protrusion. The sealing case 300 is formed with a flange 330 formed along the circumference of the sealing case 300 and a fix groove 340 having a recessed shape from the lower side of the flange 330 toward the inside. On the inner surface of the valve body 100 spaced apart from the intermediate passage by a predetermined length, an installation groove 120 recessed along the periphery and an installation protrusion 130 protruding upward from the installation groove 120 are formed. .

The flange 330 of the sealing case 300 is disposed in the installation groove 120 of the valve body 100, and the installation protrusion 130 of the valve body 100 is in the fix groove 340 of the sealing case 300. Arranged and the sealing case 300 is stably fixed to the valve body 100. To this end, the valve body 100 may be composed of an upper valve body 100 and a lower valve body 100. That is, the installation protrusion 130 is formed on the lower valve body 100, and when the upper valve body 100 is combined with the lower valve body 100, the installation protrusion 130 protrudes to the portion where the installation protrusion 130 is formed. The installation groove 120 may be formed between the upper valve body 100 and the lower valve body 100 having a length longer than the length of the prescribed length.

On the other hand, the lower valve body 100 and the upper valve body 100 is formed with a stepped "b" in the outer side of the lower valve body 100 to prevent the outflow of fluid, the upper valve body 100 is in this position The "b" shaped projections that are bound to are formed and they can be joined and linked.

The stem 400 may be installed in a space partitioned by the sealing case 300.

Figure 7 shows a cross section of the upper stem and the lower stem and bolt of the present invention globe valve.

The stem 400 has a set length and is formed through the communication hole 310 inside the sealing case 300. The stem 400 is connected to a control device installed on the upper side, which is not shown, and performs linear up and down movements. The valve plug 500 is installed at the bottom of the stem 400, and when the stem 400 moves downward, the valve plug 500 is seated on the seat 200 to close the intermediate passage, which is a flow path, and the stem 400 ) Moves to the top

The stem 400 includes an upper stem 410 and a lower stem 420.

The upper stem 410 is located inside the sealing case 300 and moves only inside the sealing case 300. The lower stem 420 is disposed to protrude downward from the communication hole 310 of the sealing case 300 to move the interior space 110 of the sealing case 300 and the valve body 100.

The upper portion of the upper stem 410 is connected to a control device not shown, and the lower portion is connected to the upper portion of the lower stem 420, so that when the upper stem 410 moves, the lower stem 420 also moves.

The lower portion of the upper stem 410 has an empty interior and an extension having a larger size than the communication hole 310 is formed. The lower portion of the extension is open, and the interior is formed as a space. In addition, a portion of the upper stem 410 contacting the extension portion is formed with a thread having a set length along a set length around the inside. The lower stem 420 has a size corresponding to the size of the communication hole 310 even though a thread corresponding to the thread of the upper stem 410 is formed along the outer circumference at the upper portion. . The connection protrusion of the lower stem 420 penetrates the communication hole 310 and is coupled to the threaded portion of the upper stem 410 through a screw connection. Here, a bolt may be additionally disposed and installed between the upper stem 410 and the lower stem 420.

Formed in this way, the upper stem 410 of the present invention performs vertical movements up and down by a control device, but reciprocates only within the sealing case 300 due to the extension, and fluid is sealed through the communication hole 310. (300) It does not flow into the inside, the lower stem 420 is firmly connected to the upper stem 410 to do the up and down movement, but has a size corresponding to the size of the communication hole 310, the communication hole 310 ) To prevent the fluid from flowing into the sealing case 300, and when moving downward through a linear motion, the valve plug 500 installed at the lower part of the lower stem 420 is seated on the seat 200, thereby providing an intermediate passage. It can be closed to block the discharge of fluid. Further, when the upper stem 410 moves upward, the intermediate passage may be opened.

In addition, the bellows 600 may be installed along the circumference of the upper stem 410. The upper stem 410 is operated within the sealing case 300 in which no fluid is present as described above, so the bellows 600 is not affected by the fluid. Therefore, damage to the bellows 600 is prevented.

Figure 2 is an enlarged view of the seat and valve plug of the present invention globe valve.

The valve plug 500 has a set shape and is connected to the stem 400 to close or open the intermediate passage in a manner that is seated or detached from the seat 200. An inclined contact portion 510 is formed around an outer circumference spaced at a predetermined interval from a lower portion of the valve plug 500, and a blocking portion 520 protruding along a radial direction is formed above the contact portion 510. do.

The seat 200 is disposed on one side of the valve body 100, more precisely, more accurately, the seat 200 is installed in the intermediate passage of the valve body 100 described above. The seat 200 serves to narrow the flow path of the intermediate passage when the seat 200 is installed in the intermediate passage, including a hole having a size set at the center. Looking at the upper surface of the sheet 200 while moving the gaze from the outside to the inside, a flat portion having a flat shape is formed, and the inclined portion 210 is formed at an angle set toward the inside by being connected to the flat portion.

When the stem 400 moves downward and the valve plug 500 is seated on the seat 200, the contact portion 510 of the valve plug 500 comes into contact with the inclined portion 210 of the seat 200, The blocking portion 520 of the valve plug 500 contacts the flat portion of the seat 200 and is disposed in close contact with the seat 200. Through this, the valve plug 500 is stably adhered to and seated on the seat 200 and stably closes a hole formed in the center of the seat 200 to prevent fluid from moving through the intermediate passage to the outlet passage.

A temperature sensor 910 may be installed inside the valve plug 500. It is natural that the temperature sensor 910 needs power during operation. Therefore, the power line must be connected to the temperature sensor 910. In the present invention, the temperature sensor 910 is disposed on the lower side of the inside of the valve plug 500, and the power line of the temperature sensor 910 is through the empty space in the center of the lower stem 420 and the upper stem 410. It can be placed outside. Therefore, the temperature sensor 910 can be supplied with power to measure the temperature of the fluid, and if there is an abnormality, it can transmit a signal to a control unit (not shown) to perform a warning alarm.

A filter groove 220 may be formed under the sheet 200. Four filter grooves 220 may be formed based on the center of the sheet 200. The filter 800 may be installed in the filter groove 220.

Fig. 6(a) shows a side view of the filter of the present invention globe valve, and Fig. 6(b) shows a perspective view of the filter of the present invention globe valve.

The filter 800 includes a filtering unit 820 that filters foreign substances and a leg 810 that protrudes to one side with a set angle around the filtering unit 820 and is bent.

The filtering unit 820 serves to filter fine foreign matters that may not be known.

It is preferable that the legs 810 of the filter 800 are composed of four. The leg 810 of the filter 800 includes a vertical portion that extends vertically in one direction and a bent portion that is bent toward the inside at an end of the vertical portion. The leg 810 of the filter 800 is preferably made of a material that is somewhat flexible and movable.

Therefore, the leg 810 of the filter 800 is forcibly fitted into the filter groove 220. Accordingly, the vertical portion of the filter 800 comes into contact with the inner surface of the filter groove 220, and the leg 810 is caught in the filter groove 220 so that the filter 800 can be stably fixed without additional fixing means. . At least, if the filter 800 does not strongly receive the force in the opposite direction in which the fluid is moved, the leg 810 of the filter 800 does not deviate from the filter groove 220.

Through this, the filter 800 is stably fixed to the filter groove 220 when the globe valve is operated, and when a problem occurs while performing filtering, the operator easily removes the filter groove 220 from the filter groove 220 and removes the new filter 800 from the filter groove. It can be replaced very easily by fitting it in 220.

5 shows the glass lining of the present invention globe valve.

The glass lining 700 is formed on the inner surface of the valve body 100, that is, the inner space 110. The glass lining 700 prevents the fluid from contacting and reacting on the inner surface of the valve body 100 to protect the valve body 100 from the fluid, thereby protecting the valve body 100 from the fluid, thereby lower valve It is preferably formed on the inner surface of the body 100. That is, it is preferable that the inner surface of the upper valve body 100 is not formed.

The glass lining 700 does not contaminate the fluid while protecting the valve body 100, so it has a set thickness, but must have a smooth surface. Therefore, the glass lining 700 is preferably formed through a plurality of heating, cooling, and ground.

As a result of multiple experiments, the total thickness of the glass lining 700 is preferably formed between 1.3 mm and 2.7 mm. Therefore, the glass lining 700 is scattered on the inner surface of the valve body 100 with a thickness of 1 mm on the inner surface of the valve body 100 (more precisely, the inner surface of the lower valve body 100) and thereafter After heating, the glass powder is reacted with a surface inside the valve body 100 formed of metal, cooled, and then polished. When the polishing is performed, the surface of the glass powder is made smooth, but the thickness is 0.3 mm to 0.4 mm. This completes the ground coating process.

When the ground coating is finished, the glass powder is scattered again by 1 mm, heated, cooled and then polished to make the total thickness from 0.6 mm to 0.8 mm. Repeat this process a total of 5 times to complete the cover coating process.

In this case, the total thickness of the glass lining 700 finally formed is as described above.

The glass lining 700 prevents the valve body 100 from being operated with the fluid to protect the valve. Through this, the glove valve of the present invention is protected from fluid to extend its life.

Although the present invention has been illustrated and described in relation to specific embodiments, it is understood in the art that the present invention can be variously improved and changed within the limits that do not depart from the technical spirit of the present invention provided by the following claims. It will be obvious to those of ordinary skill.

100: valve body 110: the interior space (of the valve body)
120: installation groove 130: installation projection
200: sheet 210: inclined portion
220: filter groove 300: sealing case
310: Communication Hall 320: O-ring Home
330: Flange 340: Fix groove
400: stem 410: upper stem
420: lower system 500: valve plug
510: contact portion 520: blocking portion
600: bellows 700: glass lining
800: filter 810: leg
820: filtering unit 910: temperature sensor
920: Liquid detection sensor

Claims (10)

A valve body having an inner space which is a flow path;
A seat installed on one side of the interior space of the valve body;
A sealing case in which a communication hole is formed at one side, and is installed in an inner space of the valve body spaced apart from the seat to partition the inner space;
A stem having a set length and installed through the communication hole inside the sealing case and performing a linear motion according to a control device;
A valve plug installed at an end of the stem to seat or leave the seat according to the linear motion of the stem and to open and close the flow path;
Bellows installed to surround the stem inside the sealing case to assist linear movement of the stem and
It includes a glass lining formed along the inner surface of the valve body,
The valve body
Installation grooves recessed from inside to outside along the circumferential direction, and installation protrusions protruding in one direction from the installation grooves are formed,
The sealing case is formed with a flange protruding along the circumferential direction and a recess recessed in the flange, so that the flange is disposed in the installation groove of the valve body, and the installation protrusion is fitted into the fix groove so that the sealing case is Is fixed to the valve body,
The stem includes an extension having a size not smaller than the size of the communication hole of the sealing case, and an upper stem that does not invade the communication hole and moves, and a connection protrusion having a size corresponding to the communication hole is formed, so that the upper part is formed. The connection protrusion is disposed inside the stem and connected to the upper stem to include a lower stem that penetrates the communication hole and moves along the upper stem in the interior space of the valve body.
The size of the lower portion of the upper stem is formed larger than the connecting projection, a thread is formed inside, and the connecting projection is formed smaller than the size of the upper stem, and a thread is formed on the outer circumferential surface.
The upper stem and the connecting projection are coupled through a screw connection
Globe valve, characterized by. According to claim 1,
The glass lining,
After spraying the glass powder to the inside surface of the valve body to a thickness of 1 mm, heating it, cooling it for a set time, and grounding it to perform a ground coating process to grind to a thickness of 0.3 mm to 0.4 mm, and After sprinkling the glass powder on the surface again to a thickness of 1 mm, heating it, cooling it for a set time, and grounding, repeating the process to increase the thickness from 0.3 to 0.4 mm.The coating thickness of the valve body by the glass powder is from 1.3 mm to 2.7 mm. Repeated 5 or more times to form between the thicknesses of
Globe valve, characterized by. delete According to claim 1,
The sealing case
O-ring grooves are formed at predetermined intervals along the periphery of the communication hole, and O-ring grooves are installed to seal the fluid so that fluid does not move into the sealing case.
Globe valve, characterized by. delete According to claim 1,
The upper portion of the sheet includes a flat portion of a flat shape and an inclined portion connected to the flat portion and inclined toward one direction,
The valve plug,
It is installed on the lower part of the lower stem but is connected to the inclined contact portion and the contact portion in a shape corresponding to the inclined portion formed on the sheet along the periphery, but protrudes along the radial direction, and the lower surface includes a flat shape blocking portion.
When the valve plug is seated on the seat, the contact portion is in close contact with the inclined portion and the blocking portion is in contact with the inclined portion to close the hole formed in the center of the seat.
Globe valve, characterized by. The method of claim 6,
The seat is seated on the valve body, and a recessed filter groove is formed in a portion of the lower surface of the seat that does not contact the valve body toward the inside.
Globe valve, characterized by. The method of claim 7,
A filter is installed on the seat.
The filter extends toward one direction and includes a leg including a bent portion bent toward one direction at an end portion of the vertical portion and a filtering portion connected at the other end of the leg to filter foreign substances.
When the filter is fitted into the filter groove, the vertical portion abuts an inner surface of the filter groove, and is fixed to the filter groove by elasticity of the bent portion
Globe valve featuring The method of claim 8,
A liquid detection sensor is installed between the communication hole and the bellows to detect whether fluid has been moved to the sealing case through the communication hole.
Globe valve, characterized by. The method of claim 9,
A temperature sensor that senses the temperature of the fluid is installed inside the lower stem, and the power line of the temperature sensing sensor penetrates the upper stem from the inside of the lower stem and is carried out to the outside.
A fluid detection sensor for measuring the presence of fluid is installed on a side wall of the sealing case at a position corresponding to the bellows, which is a position spaced upward from the communication hole.
Globe valve, characterized by.

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