JP2005090677A - Valve unit for vacuuming and metal lining case equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal lining case equipped with the valve unit for vacuuming that endures a high temperature and can keep a valve closing state for a long time. <P>SOLUTION: This unit is composed of a valve body 10 of hard metal, a metal connector 11 for connecting one end of a valve room 8 to a vacuum pump and a valve body 12 of soft metal. One end side valve seat 13 and another end side valve seat 14 are provided with the valve room 8, and the clearance forming means is provided to form the clearance for valve opening while one end face 12a of the valve body 12 touches to one end valve seat part 13 and an annular protrusion part 16 that can bite into another end face 12b of the valve body 12 is formed on another end side valve seat 14. When vacuuming is started, one end face 12a of the valve body 12 touches to one end side valve seat 13 and closes by the suction force from one end side of the valve room 8 and another end face 12b of the valve 12 is opened spacing from another end side valve seat part 14. When finishing the vacuuming, it constitutes so that another end face 12b of the valve body 12 is closed contacting to another end side valve seat 14 by the suction force on the side of another end of the valve room 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a valve device for evacuation and a metal lining container provided with the valve device.

An example of this type of evacuation valve device is described in Patent Document 1 made by the applicant of the present invention. That is, this valve device has an air passage penetrating in the axial direction, is attached to a vacuum evacuation point, is attached to a valve main body, the valve main body, and a connection fitting for connecting one end side of the air passage to the vacuum pump side, A valve that is loosely fitted in the valve chamber of the valve body, and when evacuation is started, one end surface of the valve comes into contact with the one end side valve seat portion by the suction force from one end side of the valve chamber. When the other end surface of the valve is opened away from the valve seat portion on the other end side, and the evacuation is finished, the other end surface of the valve is moved to the other end side valve seat portion by the suction force due to the negative pressure generated on the other end side of the valve chamber. The valve is closed by abutting on the O-ring. After the evacuation is completed, a closing lid is attached to the valve body in place of the connection fitting, and the other end surface of the valve is pressed against the other end side valve seat through the O-ring to maintain the valve closing state. Yes.
Japanese Patent Application No. 2002-124492

  Thus, in the valve device described in Patent Document 1, when evacuation is completed, the other end surface of the valve has an O-ring on the other end side valve seat portion due to the suction force caused by the negative pressure generated on the other end side of the valve chamber. The other end surface of the valve is pressed against the valve seat portion on the other end side through the O-ring by attaching a closing lid after the evacuation is completed. There is a problem in that it cannot be sufficiently endured in use, and is deteriorated during long-term use, the sealing function is deteriorated, and the valve closed state cannot be maintained.

  In view of the above-described problems, the present invention can sufficiently withstand use at high temperatures and can maintain a closed valve state for a long period of time, and a metal equipped with the valve device An object is to provide a lining container.

  If the valve apparatus of the invention which concerns on Claim 1 attaches | subjects and shows the referential mark of embodiment mentioned later, while the valve chamber 8 is formed in the inside and the air passage 9 penetrates an axial direction in the center part, a vacuum-evacuation location A valve body 10 made of hard metal, attached to the valve body 10, a connection fitting 11 for connecting one end side of the valve chamber 8 to a vacuum pump, and a soft metal made loosely fitted in the valve chamber 8. The valve body 12 includes one end side valve seat portion 13 that contacts one end surface 12a of the valve body 12 facing one end side thereof, and the valve body 12 facing the other end side of the valve chamber 8. A valve body is provided with a gap forming means for providing a valve opening gap between the one end face 12a of the valve body 12 and the one end side valve seat section 13 while providing the other end side valve seat section 14 with which the end face 12b abuts. 12 is provided on one end surface 12a or one end side valve seat portion 13, and the other end side valve seat portion 14 is provided in addition to the valve body 12. When the annular protrusion 16 that can bite into the surface 12b is formed and the connecting fitting 11 is attached to the valve body 10 to start evacuation, the one end surface 12a of the valve body 12 is attracted by the suction force from one end side of the valve chamber 8. Is in contact with the one end side valve seat portion 13 and the other end surface 12b of the valve body 12 is spaced apart from the other end side valve seat portion 14 to be opened, and when vacuuming is finished, negative pressure generated on the other end side of the valve chamber 8 is generated. The other end surface 12b of the valve body 12 is brought into contact with the other end side valve seat portion 14 by a suction force by pressure so as to be closed.

  According to a second aspect of the present invention, in the evacuating valve device according to the first aspect, the gap forming means is formed from the concave strip portion 15 or the convex strip portion formed on the one end surface 12a of the valve body 12 or the one end side valve seat portion 13. It is characterized by becoming.

  According to a third aspect of the present invention, in the evacuation valve device according to the first or second aspect, the valve body 12 is pressed from the one end face 12a side by screwing into the valve body 10 instead of the connection fitting 11 after the evacuation. It is characterized by comprising a valve body pressing metal fitting 17 for crimping the other end face 12b to the other end side valve seat part 14.

  The invention according to claim 4 is a metal lining container provided with the evacuation valve device according to any one of claims 1 to 3, wherein a lining material is bonded to the inside of the container forming base material, and the base material Vacuum so that the air passage 9 of the valve body 10 communicates with the sealed gap portion of the container body 2 made of a single body or the container body 2 made of a plurality of divided bodies in which the gap between the lining material and the lining material is hermetically sealed. A pulling valve device 1 is attached.

  According to the evacuating valve device of the invention according to claim 1, the evacuation operation can be easily performed by simply attaching the valve main body to the portion to be evacuated and attaching the connection fitting to the valve main body. Since the structure is extremely simple and the number of parts is small, it is easy to manufacture and can be provided at low cost.

  In particular, in this valve device, the valve body is made of a soft metal material instead of using an O-ring for hermetic sealing at a portion where the valve body comes into contact with the valve seat portion on the other end side of the valve chamber after the evacuation is completed. On the other hand, the valve body is formed of a metal material that is harder than the valve body, and an annular protrusion that can bite into the other end surface of the valve body is formed on the other end side valve seat portion of the valve chamber that the valve body abuts after completion of emptying. Therefore, when the valve body abuts against the other end side valve seat and closes, the annular protrusion bites into the opposite surface of the valve body and performs the same sealing action as the O-ring. Since the O-ring is not used, the valve device components can sufficiently withstand high temperature and high heat, and the material does not change over time unlike the O-ring. Can be maintained.

  According to the invention which concerns on Claim 2, since the clearance gap formation means consists of the concave strip part 15 or convex strip part formed in the one end surface or one end side valve seat part of a valve body, the manufacture becomes easy.

  According to the invention of claim 3, by attaching a valve body pressing metal fitting instead of the connection metal fitting after completion of evacuation, the other end surface of the valve body is always pressure-bonded to the valve seat portion on the other end, thereby completely closing the valve. The state can be maintained, and even if vibration or impact acts on the valve body, there is no possibility that the valve body is separated from the valve seat portion on the other end side and the valve closed state is released.

  According to the metal lining container of the invention according to claim 4, the evacuation valve device is attached to the container main body so that the air passage of the valve main body communicates with the sealing gap of the container main body. By evacuating the gap between the base material and the lining material, the lining material can be tightly bonded to the inside of the base material, and the tight bonding state of the lining material to the base material can be maintained for a long time. .

  FIG. 1 is a front view showing a metal lining container provided with a evacuation valve device 1 according to the present invention, and FIG. 2 shows a container body 2 of the metal lining container as a plurality of divided bodies 2a and end plates 2b. It is a longitudinal cross-sectional view of the state divided | segmented into the baseplate part 2c. FIG. 3 is an enlarged view of a portion surrounded by an arrow A in FIG. The container main body 2 of this metal lining container is constituted by three divided bodies of a body portion 2a, an end plate portion 2b, and a bottom plate portion 2c. In this embodiment, the container body 2 is constituted by a plurality of divided bodies. However, the container body 2 may be a single body without being divided.

The body 2a of the container body 2 includes a body base 2a ₁ made of a steel plate and a body lining material 2a ₂ made of a high nickel alloy attached to the inside of the body 2a _1. The upper end peripheral edge and the lower end peripheral edge of the body lining material 2a ₂ are joined together by welding, and the gap between the body base material 2a ₁ and the body lining material 2a ₂ is hermetically sealed. It has become. The flanges 4, 5 for bonding is attached to the upper and lower end of the barrel base material 2a _1, evacuating valve device 1 is equipped on its upper flange 4. Then, the body portion liner 2a ₂ is are stuck also the lower end surface of the upper flange 4 upper surface and the lower flange 5. In addition, a cooling jacket 7 is provided on the body base material 2a ₁ .

Further, the end plate portion 2b is composed of a end plate portion base material 2b ₁ made of a steel plate and a end plate portion lining material 2b ₂ made of a high nickel alloy that is similarly attached to the inside of the end plate portion base material 2b _1. And the end plate peripheral lining material 2b ₂ are joined to each other by welding, and the gap between the end plate base material 2b ₁ and the end plate lining material 2b ₂ is also hermetically sealed. The flange 6 is attached to the lower end of the end plate portion preform 2b _1, evacuating valve device 1 is equipped with the flange 6. The end plate lining material ₂ b ₂ is attached to the lower end surface of the flange 6.

Further, the bottom plate portion 2c is made of a bottom plate portion preform 2c ₁ made variable become thick steel, high nickel alloy of the bottom plate liner 2c ₂ Metropolitan which is affixed in the same manner on the inner side of this bottom plate portion mother The lower peripheral edges of the material 2c ₁ and the bottom plate lining material 2c ₂ are joined together by welding, and the gap between the bottom plate base material 2c ₁ and the bottom plate lining material 2c ₂ is also hermetically sealed. Yes. The evacuation valve device 1 is provided on the peripheral edge of the bottom plate base material 2c ₁ .

  When assembling the barrel portion 2a, the end plate portion 2b, and the bottom plate portion 2c, the upper flange 4 of the barrel portion 2a and the flange 6 of the end plate portion 2b are overlapped and bolted, and the peripheral portion of the bottom plate portion 2c is joined to the barrel. The body portion 2a, the end plate portion 2b, and the bottom plate portion 2c are assembled together by being overlapped with the lower flange 5 of the portion 2a and bolted to form a metal lining container as shown in FIG.

  Next, the evacuation valve device 1 provided in the container body 2 of the metal lining container will be described with reference to FIGS. The evacuation valve device 1 is provided on the upper flange 4 of the body portion 2a, the flange 6 of the end plate portion 2b, and the bottom plate portion 2c, respectively, but each valve device 1 has the same structure. The valve device 1 provided on the upper flange 4 of the trunk portion 2a will be described. FIG. 3 is an enlarged view of a portion surrounded by an arrow A in FIG. 2, and shows an attachment state after evacuation, and FIG. 4 shows an attachment state before evacuation.

  As shown in FIGS. 3 and 4, the evacuation valve device 1 has a valve chamber 8 formed therein, and an air passage 9 passes through the center of the valve chamber 8 in the axial direction. A hard metal valve body 10 attached to the upper flange 4a of 2a, and a hard metal fitting 11 attached to the valve body 10 for connecting one end side of the valve chamber 8 to a vacuum pump (not shown). And a soft metal valve body 12 that is loosely fitted in the valve chamber 8 and a valve body pressing metal member 17 that is attached to the valve body 10 in place of the connection metal member 11 after completion of evacuation.

  The valve chamber 8 has one end side valve seat portion 13 that contacts one end surface 12a of the valve body 12 facing one end side of the valve chamber 8 and the other end surface of the valve body 12 facing the other end side of the valve chamber 8. The other end side valve seat part 14 which contacts is provided, and it opens between the one end surface 12a of the valve body 12 and the one end side valve seat part 13 when the one end surface 12a of the valve body 12 contacts the one end side valve seat part 13. A concave portion 15 (gap forming means) for forming a valve gap is provided in the one end side valve seat portion 13, and the other end side valve seat portion 14 is an annular protrusion that can bite into the other end surface 12 b of the valve body 12. A portion 16 is formed.

  5A is a vertical cross-sectional view of the valve body 10, FIG. 5B is a vertical cross-sectional view of the connection fitting 11, FIG. 5C is a front view of the connection fitting 11 viewed from the tip surface side, and FIG. 12 is a side view of the valve body presser fitting 17. As shown in (a), the valve body 10 is formed in a bottomed cylindrical shape, and is provided with a through-hole 10o that forms an air passage 9 in the center of the bottom wall portion 10b, and the cylindrical wall portion 10a. A female screw portion 10c into which the hollow screw shaft portion 11a of the connection fitting 11 is screwed is formed on the inner peripheral surface, and a mounting flange portion 10d is formed at the end opposite to the bottom wall portion 10b.

  As shown in FIGS. 5 (b) and 5 (c), the connection fitting 11 includes a hollow screw shaft portion 11a that is screwed into the female screw 10c of the valve main body 10, and a large-diameter thick cylindrical portion that is connected to the hollow screw shaft portion 11a. 11b, and the air passage 21 penetrates along the axis. An air suction pipe 18 connected to a vacuum pump (not shown) is connected to the large-thick and thick cylindrical part 11b side, and a concave part 15 (forming a valve opening gap) is formed on the distal end surface of the hollow screw shaft part 11a. The gap forming means) is formed in a cross shape, and a fitting groove 20 for fitting the O-ring 19 is formed on the tip surface of the large-diameter thick cylindrical portion 11b.

  By attaching the connection fitting 11 to the valve body 10, the valve chamber 8 is formed inside the valve body 10. The valve body 12 loosely fitted in the valve chamber 8 is shown in FIG. 5 (d). The valve body 12 is made of a softer metal than the valve body 10 and the connecting fitting 11 such as aluminum, nickel, copper, etc. The main body 10 is formed in a short columnar shape or a thick disk shape having an outer diameter slightly smaller than the inner diameter of the cylindrical wall portion 10a.

  As shown in FIG. 5 (e), the valve body presser metal fitting 17 is composed of a bolt that can be screwed into the female threaded portion 10c of the cylindrical wall portion 10a of the valve main body 10, and has one end surface for rotating operation. The hexagonal hole 17a is provided concentrically, and can be rotated by fitting a rotary operation tool such as a wrench into the hexagonal hole 17a.

The method of using the evacuating valve device 1 having the above-described configuration will be described. Prior to the use of the valve device 1, the valve body 10 is connected to the upper flange of the body portion 2a of the metal lining container, which is the evacuating portion. Attach to 4. When the valve body 10 is mounted, as shown in FIG. 3, the valve body 10 is inserted into the mounting hole 23 provided in advance in the inlet portion of the air passage 22 that penetrates the flange 4 in the radial direction and penetrates the body base material 2a _1. The main body 10 is fitted and the mounting flange 10d is welded to the flange 4 of the body 2a.

As shown in FIG. 3, the air passage 22 provided in the flange 4 of the trunk portion 2a communicates with a sealed gap s between the trunk base material 2a ₁ and the trunk lining material 2a _2. Yes. Further, another air passage 24 is branched from the middle of the air passage 22, and this branch air passage 24 communicates with a sealed gap portion s between the flange 4 and the body lining material 2 a ₂ . .

  If the valve main body 10 is attached to the flange 4 of the trunk portion 2a as described above, the hollow screw shaft portion 11a of the connection fitting 11 is screwed into the female screw portion 10c of the valve main body 10 as shown in FIG. By tightening, the connection fitting 11 is attached to the valve body 10, and one end side of the valve chamber 8 formed inside the valve body 10 is connected to a vacuum pump (not shown) via the connection fitting 11 and the air suction pipe 18. Connect and make it possible to vacuum.

  When evacuation is started by operating the vacuum pump in such a state, the air in the valve chamber 8 in the valve body 10 is sucked from the vacuum pump side through the air suction pipe 18, and thus in the valve body 10, As can be seen from the air flow in FIG. 4, the one end surface 12 a of the valve body 12 contacts the one end side valve seat 13 of the valve chamber 8 by the suction force of the air sucked from one end side of the valve chamber 8. At the same time, the other end surface 12b of the valve body 12 is separated from the other end side valve seat portion 14 and is opened.

At this time, even if the one end surface 12a of the valve body 12 contacts the one end side valve seat portion 13 of the valve chamber 8, the one end side valve seat portion 13 has a cross-shaped concave portion 15 which is a gap forming means for valve opening. Therefore, the air that has entered the other end side of the valve chamber 8 from the air passage 22 provided in the flange 4 of the body portion 2a through the air passage 9 of the valve body 10 flows into the inner periphery of the valve chamber 8. 3 passes through the gap between the surface and the outer peripheral surface of the valve body 12, enters one end side of the valve chamber 8, and is sucked into the air suction pipe 18 through the air passage 21 of the connection fitting 11, thereby the barrel shown in FIG. Vacuum sealing of the sealed gap s between the base material 2a ₁ and the body lining material 2a ₂ and the sealed gap s between the flange 4 and the body lining material 2a ₂ is performed.

  When the operation of the vacuum pump is stopped after evacuating the sealed gap s to a predetermined pressure, the valve body 12 is connected to the air passage 21 side of the connection fitting 11 until one end side valve seat portion of the valve chamber 8 is reached. 13 disappears and negative pressure is generated on the air passage 22 side of the flange 4 and the air passage 9 side of the valve body 10, so suction from the other end side of the valve chamber 8 due to the negative pressure is generated. The valve body 12 is sucked by the force, and the other end surface 12b comes into contact with the other end side valve seat portion 14 of the valve chamber 8 to be in a valve-closed state. At this time, the other end side valve seat portion 14 of the valve chamber 8 is formed with an annular protrusion 16 and the valve body 12 is formed of a softer metal material than the valve body 10. The annular projecting portion 16 of the seat portion 14 bites into the other end surface 12b of the valve body 12, and the air passage 9 in the valve body 10 is reliably shut off, so that the valve is completely closed.

  After the valve is closed as described above, the connection fitting 11 is removed from the valve body 10, and the valve body pressing fitting 17 is attached as shown in FIG. That is, by screwing the valve body presser fitting 17 into the female threaded portion 10c of the valve body 10 from which the connection fitting 11 has been removed, the valve body 12 is pressed from the one surface 12a side and the other end surface 12b is connected to the other end side valve of the valve chamber 8. Press firmly against the seat 14 and crimp. As a result, the annular protrusion 16 of the valve seat 14 on the other end side further bites into the other end surface 12 b of the valve body 12, and the valve body 12 is held in a completely closed state by the valve body pressing metal 17. Will be.

  Even if the valve body holding member 17 is not attached, the valve body 12 can be held in a closed state in which the valve body 12 is in contact with the other end side valve seat portion 14 by the air suction force from the air passage 9 side of the valve body 10. However, if vibration or impact is applied to the container body 2 side, the valve body 12 may be separated from the valve seat 14 and the valve closing state may be released. The valve body 12 can be constantly pressed against the valve seat portion 14 to maintain a complete valve closing state.

  In this embodiment, when the one end surface 12a of the valve body 12 contacts the one end side valve seat portion 13 of the valve chamber 8, the one end side valve of the valve chamber 8 serves as a gap forming means for forming a valve closing gap therebetween. The cross-shaped concave portion 15 is formed at the tip of the connection fitting 11 that is the seat portion 13. Instead of the cross-shaped concave portion 15, for example, a cross-shaped convex portion is formed on the one end surface 12 a of the valve body 12. May be.

  Further, in this embodiment, the one end side valve seat portion 13 of the valve chamber 8 is formed at the distal end portion of the hollow screw shaft portion 11a of the connection fitting 11, but this one end side valve seat portion 13 is not necessarily connected to the connection fitting. 11, a part of the valve body 10 protrudes in a flange shape on the side facing the one end surface 12 a of the valve body 12, and this flange-shaped portion is provided on the one end side valve seat of the valve chamber 8. It is good also as part 13.

  According to the evacuation valve device 1 described above, the evacuation operation can be easily performed by simply attaching the valve body 10 to the portion to be evacuated and attaching the connection fitting 11 to the valve body 10. Since the structure is extremely simple and the number of parts is small, it is easy to manufacture and can be provided at low cost. In particular, in this valve device 1, the valve body 12 does not use an O-ring for hermetic sealing at a portion where the valve body 12 comes into contact with the other end side valve seat portion 14 of the valve chamber 8 after the evacuation is completed. Is formed of a soft metal material, while the valve body 10 is formed of a metal material harder than the valve body 12, and the valve seat 12 on the other end side of the chamber 8 with which the valve body 12 abuts after completion of emptying is provided with a valve Since the annular protrusion 16 that can bite into the other end surface 12 b of the body 12 is formed, the annular protrusion 16 of the valve body 12 is closed when the valve body 12 abuts against the other end side valve seat 14 and closes. It can bite into the opposing surface 12b and can perform a sealing action similar to that of an O-ring, thereby ensuring a closed valve state. In addition, since the O-ring is not used, the valve device constituent members can sufficiently withstand high temperature and heat, and the material does not change over time unlike the O-ring, so that the valve closed state can be maintained for a long time. .

  Then, according to the metal-lined container in which the evacuation valve device 1 is mounted on the container body 2, the air passage 9 of the valve body 10 communicates with the sealed gaps of the divided bodies 2 a, 2 b, 2 c of the container body 2. By attaching the evacuation valve device 1 to the evacuation unit, the sealing gap between the base material and the lining material is evacuated, so that the lining material can be securely bonded to the inside of the base material. The tight bonding state of the lining material to the base material can be maintained for a long time.

It is a front view which shows the metal lining container provided with the valve apparatus for vacuuming which concerns on this invention. It is a longitudinal cross-sectional view of the state which divided | segmented the container main body of the said metal lining container into the trunk | drum which is a several division body, the end plate part, and the baseplate part. FIG. 3 is an enlarged view of a portion surrounded by an arrow a in FIG. 2. It is a longitudinal cross-sectional view which shows the evacuation state by use of the same evacuation valve apparatus. (a) is a vertical cross-sectional view of the valve body, (b) a vertical cross-sectional view of the connection bracket, (c) is a front view of the connection bracket, (d) is a side view of the valve disc, and (e) is a side view of the valve clamp. It is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum drawing valve apparatus 2 Container body 2a body part (partition body) of metal lining container
2b End plate (divided body)
2c Bottom plate (divided body)
8 Valve chamber 9 Air passage 10 Valve body 11 Connection fitting 12 Valve body 12a One end surface 12b of valve body The other end surface 13 of the valve body One end side valve seat portion 14 The other end side valve seat portion 15 A concave portion (gap forming means)
16 Annular projection 17 Valve body clamp

Claims (4)

A valve chamber is formed inside, and an air passage extends through the center in the axial direction. The valve body is made of a hard metal that is attached to the evacuation point, and is attached to the valve body. One end of the valve chamber is connected to a vacuum pump. It consists of a connecting metal fitting to make it and a soft metal valve body loosely fitted in the valve chamber,
The valve chamber is provided with one end side valve seat portion that contacts one end surface of the valve body facing one end side, and another end side valve seat portion that contacts the other end surface of the valve body facing the other end side of the valve chamber. In addition, when the one end surface of the valve body comes into contact with the one end side valve seat portion, a gap forming means for forming a valve opening gap therebetween is provided on one end surface of the valve body or the one end side valve seat portion, and the other end side valve seat portion Is formed with an annular protrusion that can bite into the other end face of the valve body,
When evacuation is started after the fitting is attached to the valve body, one end surface of the valve body comes into contact with the valve seat portion on one end side and the other end surface of the valve body is on the other end side by the suction force from one end side of the valve chamber When the valve is opened away from the valve seat and the evacuation is completed, the other end surface of the valve body abuts on the other valve seat by the suction force generated by the negative pressure generated at the other end of the valve chamber and closes. The evacuation valve device is designed.   The evacuation valve device according to claim 1, wherein the gap forming means is formed of a concave strip or a convex strip formed on one end surface or one end side valve seat of the valve body.   A valve body pressing metal fitting is provided for pressing the valve body from one end surface side and screwing the other end surface to the valve seat portion on the other end side by screwing into the valve body instead of the connection metal fitting after evacuation. The evacuation valve device according to 1 or 2. A metal lining container comprising the evacuation valve device according to any one of claims 1 to 3, wherein a lining material is bonded to the inner peripheral surface of the container forming base material, and the space between the base material and the lining material. A metal lining in which a vacuum pulling valve device is attached so that an air passage of the valve body communicates with the sealed gap portion of a container body made of a single body or a container body made of a plurality of divided bodies. container.

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