Manual corrugated pipe valve

Abstract

The utility model discloses a manual corrugated pipe valve which comprises a valve body, a lower valve rod, a corrugated pipe assembly, a valve cover, an upper valve rod and a hand wheel, a limiting step face is arranged in the middle of the length direction of the lower valve rod, the manual corrugated pipe valve further comprises a guide sleeve, and the guide sleeve is arranged on the lower valve rod in a sleeved mode and enables the lower valve rod to move axially relative to the guide sleeve. The lower end of the guide sleeve is inserted between the corrugated pipe assembly and the lower valve rod, the upper end of the guide sleeve is provided with a guide sleeve flange, the guide sleeve flange extends out of the upper part of the shaft ring, and the valve cover presses the shaft ring on the valve body flange through the guide sleeve flange; when the hand wheel is rotated clockwise to drive the lower valve rod to move upwards, a corrugated pipe of the corrugated pipe assembly is compressed; when the limiting step surface on the lower valve rod touches the lower end of the guide sleeve for limiting, the lower valve rod cannot be moved upwards continuously to compress the corrugated pipe, so that the manual corrugated pipe valve is prevented from being opened excessively, the reliability of the manual corrugated pipe valve is improved, the service life of the manual corrugated pipe valve is prolonged, and the corrugated pipe is prevented from being deformed and abraded.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a manual bellows valve applied in the semiconductor industry to reach the use requirement of semiconductor manufacturing flow, make the gas supply system have high purity, high reliability and durability. BACKGROUND

[0002] The bellows valve is a commonly used valve type in the pipeline system and is widely applied in the fields of semiconductors, petroleum, chemical industry, medicine and aerospace. The bellows stop valve controls the opening and closing of the valve port through the axial movement of the valve rod, thereby effectively controlling the opening and closing of the pipeline system.

[0003] The utility model discloses a manual bellows valve, including the valve body, the left end of valve body is equipped with the air inlet section, and the right end is equipped with the air outlet section, is equipped with the valve cavity in the valve body with the air inlet section and the air outlet section intercommunication, the top end cooperation pressure ring of valve body is fixedly connected with the valve cover through the screw, is rotatably installed with the hand wheel on the valve cover, the hand wheel is installed with the valve rod through the screw in, and the one end of valve rod away from the hand wheel extends to the valve cover, and is connected with the inner wall of valve cover threadedly, the bottom end of valve rod is connected with the bellows valve rod through the connecting sleeve, and the one end of bellows valve rod away from the connecting sleeve extends to the valve cavity, and the air inlet end of valve cavity is adjusted through the sealing element installed at the bottom end of bellows valve rod. Advantageous effects: through the valve cage that the valve petal screw side surface is equipped with a plurality, the handle in the process of rotating can adjust the number of valve cage and the size of air outlet hole, realize the adjustment and throttling effect of gas flow, the valve petal sealing element can fill the sealing groove under extrusion, improve the sealing property.

[0004] But this manual bellows valve does not set up the guide limit structure on the upper end position of bellows assembly, can cause the valve to open excessively, make the bellows deformation and wear, reduce the reliability and service life of valve. UTILITY MODEL CONTENTS

[0005] The utility model relates to the technical problem that the existing manual bellows valve does not set up the guide limit structure on the upper end position of bellows assembly, can cause the valve to open excessively, make the bellows deformation and wear, reduce the reliability and service life of valve and provide a kind of manual bellows valve with guide limit structure to prevent the manual bellows valve from opening excessively, to improve the reliability and service life of manual bellows valve, prevent the bellows deformation and wear.

[0006] The technical problem to be solved by the utility model can be realized by the following technical scheme:

[0007] A kind of manual bellows valve, comprising:

[0008] A valve body having a gas flow passage and a corrugated tube assembly mounting portion arranged at a first included angle with the gas flow passage, a gas flow passage channel and a valve port being provided in the gas flow passage, a corrugated tube assembly mounting hole being provided in the corrugated tube assembly mounting portion, the gas flow passage channel being communicated with the corrugated tube assembly mounting hole through the valve port, the valve port being coaxial with the corrugated tube assembly mounting hole and arranged at a second included angle with the axis of the gas flow passage channel, and two gas pipes being respectively connected to the two ends of the gas flow passage channel;

[0009] A lower valve stem coaxially arranged in the corrugated tube assembly mounting hole, the upper end of the lower valve stem extending out of the corrugated tube assembly mounting hole from the opening of the end of the gas flow passage;

[0010] A corrugated tube assembly coaxially arranged in the corrugated tube assembly mounting hole and sleeved on the lower valve stem, the corrugated tube assembly having a collar at the end away from the gas flow passage, the collar extending out of the corrugated tube assembly mounting hole from the opening of the end of the gas flow passage;

[0011] A valve cover, the lower end of the valve cover being mounted on the valve body flange at the end of the valve body away from the gas flow passage through fasteners, the upper end of the lower valve stem extending into the inner hole of the valve cover after extending out of the corrugated tube assembly mounting hole from the opening of the end of the gas flow passage;

[0012] An upper valve stem, the upper valve stem being mounted in the inner hole of the valve cover in a threaded connection mode, the lower end of the upper valve stem being drivingly connected with the upper end of the lower valve stem, the upper end of the upper valve stem extending out of the upper end of the valve cover;

[0013] A hand wheel covered on the upper end of the valve cover, the hand wheel being rotatable relative to the valve cover, the upper end of the upper valve stem extending into the hand wheel and being fixedly connected with the hand wheel after extending out of the upper end of the valve cover, a hand wheel lever being mounted on the hand wheel; characterized in that:

[0014] A limiting step surface is arranged at the middle position of the length direction of the lower valve stem, and a guide sleeve is further included, the guide sleeve being sleeved on the lower valve stem and allowing the lower valve stem to axially move relative to the guide sleeve, the lower end of the guide sleeve being inserted between the corrugated tube assembly and the lower valve stem, the upper end of the guide sleeve having a guide sleeve flange extending above the collar, the valve cover pressing the collar on the valve body flange through the guide sleeve flange; when the hand wheel is rotated clockwise to rotate and upwardly move the upper valve stem, the upwardly moved upper valve stem drives the lower valve stem to upwardly move, so that the corrugated tube of the corrugated tube assembly is compressed; when the limiting step surface on the lower valve stem hits the lower end of the guide sleeve, the lower valve stem is limited from further upwardly moving to compress the corrugated tube, thereby preventing the manual corrugated tube valve from being excessively opened.

[0015] In one preferred embodiment of the utility model, a visual indication ring is arranged on the upper end of the valve cover; when the hand wheel is rotated clockwise, the visual indication ring is covered by the hand wheel, at which time the manual bellows valve is closed; when the hand wheel is rotated counterclockwise, the visual indication ring is exposed from the hand wheel, at which time the manual bellows valve is opened.

[0016] In one preferred embodiment of the utility model, a piston part is arranged on the lower end of the lower valve rod, the outer diameter of the piston part is gap-fitted with the hole face of the bellows assembly mounting hole, a sealing gasket is mounted on the bottom face of the piston part through a fastener, and the sealing gasket seals the valve port when the manual bellows valve is closed.

[0017] In one preferred embodiment of the utility model, a bellows receiving part is arranged on the lower end of the lower valve rod close to the piston part, and the lower end of the bellows is welded and connected with the bellows receiving part.

[0018] In one preferred embodiment of the utility model, the upper end of the bellows is welded and connected with the lower end of the shaft ring.

[0019] In one preferred embodiment of the utility model, a ring of nickel gaskets is arranged on the valve body flange, and a ring of grooves is arranged on the critical face of the shaft ring and the valve body flange, and the nickel gaskets are embedded in the ring of grooves.

[0020] In one preferred embodiment of the utility model, an O-shaped sealing ring is arranged between the valve cover and the shaft ring, and the O-shaped sealing ring is sleeved on the periphery of the guide sleeve flange.

[0021] In one preferred embodiment of the utility model, the lower end of the upper valve rod and the upper end of the lower valve rod are embeddedly mounted and connected through a steel ball arranged in the lower end of the upper valve rod and a disc arranged on the upper end of the lower valve rod.

[0022] In one preferred embodiment of the utility model, a leak detection hole is arranged on the valve cover, and a leak detection hole screw and a leak detection hole gasket are mounted on the outer end of the leak detection hole to block the leak detection hole.

[0023] In one preferred embodiment of the utility model, a sealing ring is arranged between the upper valve rod and the valve cover.

[0024] Thanks to the above technical scheme, the utility model increases a guide sleeve and a limiting step face on the lower valve rod, and the guide sleeve and the limiting step face are limitedly fitted to prevent the manual bellows valve from being excessively opened, improve the reliability and service life of the manual bellows valve, and prevent the bellows from being deformed and worn. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 The utility model discloses a structure diagram of manual bellows valve.

[0026] Fig. 2 It is the assembly diagram of the lower valve rod and the bellows assembly in the manual bellows valve of the utility model.

[0027] Fig. 3 It is the assembly diagram of the lower valve rod and the bellows assembly in the manual bellows valve of the utility model. DETAILED DESCRIPTION

[0028] The utility model will be further described below in combination with the drawings and specific embodiment.

[0029] Referring to Figs. 1 to 3 The manual bellows valve shown in the drawing includes valve body 100, valve cover 200, lower valve rod 300, upper valve rod 400, hand wheel 500, bellows 600 and shaft ring 700, and bellows 600 and shaft ring 700 jointly constitute the aforementioned bellows assembly.

[0030] Valve body 100 has a gas flow-through part 110 and a bellows assembly mounting part 120 arranged at a first included angle with the gas flow-through part 110, and the gas flow-through part 110 and the bellows assembly mounting part 120 are integrally manufactured, and the bellows assembly mounting part 120 is basically located at the upper part of the gas flow-through part 110.

[0031] A gas flow-through channel 111 and a valve port 112 are arranged in the gas flow-through part 110, the gas flow-through channel 111 is a straight flow channel, has small flow resistance, good smoothness and stable flow.

[0032] A bellows assembly mounting hole 121 is arranged in the bellows assembly mounting part 120, the gas flow-through channel 111 is communicated with the bellows assembly mounting hole 121 through the valve port 112, the valve port 112 is coaxial with the bellows assembly mounting hole 121 and forms a second included angle with the axis of the gas flow-through channel 111, and the second included angle is equal to the first included angle.

[0033] The two ends of the gas flow-through channel 110 are respectively connected with gas pipelines 100a and 100b.

[0034] The lower valve rod 300 is a shaft-like part, and a piston part 310 is arranged at the lower end of the lower valve rod 300, a bellows receiving part 320 is arranged at a position above the piston part 310 and adjacent to the piston part 310, and a limiting step surface 330 is arranged at the middle position of the length direction of the lower valve rod 300. The outer diameter of the piston part 310 is gap-fitted with the hole surface of the bellows assembly mounting hole 121. In addition, a sealing gasket 350 is mounted on the bottom surface of the piston part 310 through a screw 340, and the sealing gasket 350 seals the valve port 112 when the manual bellows valve is closed.

[0035] The lower valve stem 300 is coaxially arranged in the bellows assembly mounting hole 121, and the upper end of the lower valve stem 300 extends out of the bellows assembly mounting hole 121 from the opening of the upper end of the bellows assembly mounting hole 121, that is, the end of the bellows assembly mounting hole 121 away from the gas flow passage 110.

[0036] The bellows assembly is also coaxially arranged in the bellows assembly mounting hole 121 and sleeved on the lower valve stem 300, the lower end of the bellows 600 is welded to the bellows receiving portion 320, and the upper end of the bellows 600, that is, the end of the bellows 600 away from the gas flow passage 110, is welded to the lower end of the collar 700, and the collar 700 extends out of the opening of the upper end of the bellows assembly mounting hole 121.

[0037] The lower end of the valve cover 200 is mounted on the valve flange 130 of the upper end of the valve body 100, that is, the end of the valve body 100 away from the gas flow passage 110, through the bolt 210, so that the disassembly and maintenance are convenient.

[0038] The upper end of the lower valve stem 300 extends into the inner hole 220 of the valve cover 200 from the opening of the upper end of the bellows assembly mounting hole 121.

[0039] The upper valve stem 400 is also an axial part, the upper valve stem 400 is installed in the inner hole 220 of the valve cover 200 in a threaded connection mode, and the sealing ring 420 is arranged between the upper valve stem 400 and the valve cover 200.

[0040] The lower end of the upper valve stem 400 is drivingly connected to the upper end of the lower valve stem 300 in an embedded mode, the upper end of the upper valve stem 400 penetrates out of the upper end of the valve cover 200, the upper valve stem 400 is connected with the lower valve stem 300 through the steel ball 410 arranged in the lower end of the upper valve stem 400 and the disc 340 arranged on the upper end of the lower valve stem 300, the twisting of the bellows 600 during movement can be avoided, and quick connection can be realized.

[0041] The hand wheel 500 is covered on the upper end of the valve cover 200, the hand wheel 500 rotates relative to the valve cover 200, the upper end of the upper valve stem 400 extends into the hand wheel 500 and is fixedly connected with the hand wheel 500 through the flat end screw 510 after penetrating out of the upper end of the valve cover 200, the hand wheel rod 520 is mounted on the hand wheel 500, the hand wheel 500 is rotated through the hand wheel rod 520, the upper valve stem 400 is driven to rotate and axially move, and the lower end of the upper valve stem 400 is embeddedly arranged on the upper end of the lower valve stem 300, so that the lower valve stem 300 cannot rotate in the circumferential direction and can only axially move along with the upper valve stem 400.

[0042] The utility model discloses the following characteristics:

[0043] Further comprising a guide sleeve 800, the guide sleeve 800 is sleeved on the lower valve stem 300 and the lower valve stem 300 can move axially relative to the guide sleeve 800, so that in the process of axial movement of the lower valve stem 300, because the inner diameter of the guide sleeve 800 is fitted with the lower valve stem 300 and the outer diameter of the guide sleeve 800 is fitted with the inner diameter of the collar 700, the movement of the lower valve stem 300 is guided, the radial deviation of the lower valve stem 300 in the movement process is prevented, the sealing is improved, and the stability of the manual bellows valve is increased.

[0044] The lower end of the guide sleeve 800 is inserted between the collar 700 and the lower valve stem 300 in the bellows assembly, and the upper end of the guide sleeve 800 has a guide sleeve flange 810 which extends above the collar 700, and the valve cover 200 presses the collar 700 on the valve body flange 130 through the guide sleeve flange 810; in order to strengthen the sealing, a ring of nickel gaskets 131 is arranged on the valve body flange 130, and a ring of grooves 711 is arranged on the critical surface 710 of the collar 700 and the valve body flange 130, and the nickel gaskets 131 are embedded in the ring of grooves 711. In addition, an O-shaped sealing ring 900 is arranged between the valve cover 200 and the collar 700, and the O-shaped sealing ring 900 is sleeved on the periphery of the guide sleeve flange 810. The utility model adopts one-stage sealing of the bellows 600 and two-stage sealing of the O-shaped sealing ring 900, when the bellows 600 leaks, the medium enters the inner cavity of the bellows assembly from the outside of the bellows 600 (that is, the cavity between the bellows 600 and the lower valve stem 300), at this time, the O-shaped sealing ring 900, the leak detection hole gasket 250 and the sealing ring 420 play the role of two-stage sealing, and external leakage is prevented.

[0045] When the hand wheel 500 is rotated clockwise to drive the upper valve stem 400 to rotate and move upward, the upward moving upper valve stem 400 drives the lower valve stem 300 to move upward, so that the bellows 600 of the bellows assembly is compressed; when the limiting step surface 330 on the lower valve stem 300 collides with the lower end of the guide sleeve 800, the lower valve stem 300 is limited and cannot continue to move upward to compress the bellows 600, so that the manual bellows valve is prevented from being opened excessively, the bellows 600 is prevented from being deformed and worn, and the reliability and service life of the overall valve are improved.

[0046] In addition, a visual indication ring 1000 is arranged on the upper end of the valve cover 200; when the hand wheel 500 is rotated clockwise, the visual indication ring 1000 is covered by the hand wheel 500, at this time the manual bellows valve is closed; when the hand wheel 500 is rotated counterclockwise, the visual indication ring 1000 is exposed from the hand wheel 500, at this time the manual bellows valve is opened, and through the visual indication ring 1000, the operator can directly observe the state of the manual bellows valve, and misoperation is avoided.

[0047] In addition, a leak detection hole 230 is arranged on the valve cover 200, and a leak detection hole screw 240 and a leak detection hole gasket 250 are installed at the outer end of the leak detection hole 230 to block the leak detection hole, when leak detection is needed, the leak detection hole screw 240 and the leak detection hole gasket 250 are removed, and a leak detector is used to detect the leak.

[0048] The technical parameters of the manual corrugated pipe valve are as follows:

[0049]

[0050] The manual corrugated pipe valve can control the opening and closing of the pipeline, when the hand wheel 500 is rotated clockwise, the hand wheel 500 drives the upper valve rod 400 and the lower valve rod 300 to move axially upward, at the same time, the corrugated pipe 600 is compressed, the valve port 112 is opened, and the manual corrugated pipe valve is opened; when the hand wheel 500 is rotated counterclockwise, the hand wheel 500 drives the upper valve rod 400 and the lower valve rod 300 to move axially downward, until the sealing gasket 350 compresses the valve port 112, at the same time, the corrugated pipe 600 is stretched, at this time, the valve port 112 is closed, and the manual corrugated pipe valve is closed.

[0051] Particularly referring to Fig. 2 and Fig. 3 , the assembly mode of the lower valve rod 300, the corrugated pipe assembly and the sealing gasket 350 is as follows:

[0052] 1) First, the corrugated pipe 600 and the shaft ring 700 are sleeved on the lower valve rod 300, and the corrugated pipe receiving part 320 is pre-welded with the lower end of the corrugated pipe 600, then the upper end of the corrugated pipe 600 is pre-welded with the lower end of the shaft ring 700;

[0053] 2) The guide sleeve 800 is sleeved on the lower valve rod 300 and the lower end of the guide sleeve 800 is inserted between the inner diameter of the corrugated pipe 600 and the outer diameter of the lower valve rod 300, at the same time, the inner diameter of the guide sleeve 800 is fitted with the lower valve rod 300, the outer diameter of the guide sleeve 800 is fitted with the inner diameter of the shaft ring 700, and the guide sleeve flange 810 extends above the shaft ring 700 and is pressed on the shaft ring 700;

[0054] 3) The sealing gasket 350 is installed on the bottom surface of the piston part 310 of the lower valve rod 300 through the screw 340.

[0055] The installation process of the manual corrugated pipe valve is as follows:

[0056] 1) First, the sealing ring 420 is installed in the valve cover 200, then the steel ball 410 is put into the upper valve rod 400, and then the upper valve rod 400 is screwed into the inner hole 220 of the valve cover 200;

[0057] 2) Put O-ring 900 into the recess of bonnet 200, then put disc 340 into the recess above lower stem 300, then install the preassembly of bellows assembly, connect upper stem 400 and lower stem 300;

[0058] 3) Install nickel gasket 131 at the sealing position of valve body flange 130, then put one end of bellows assembly with gasket 350 into the bellows assembly installation hole 121 of valve body 100 and press tightly, screw bolt 210.

[0059] 4) After testing, install leak hole screw 240 and leak hole gasket 250, then install visual indicator ring 1000, finally install hand wheel 500, flat end screw 510, hand wheel lever 520 and label.

Claims

1. A manual bellows valve, comprising: a valve body having a gas flow passage and a bellows assembly mounting portion arranged at a first included angle with the gas flow passage, the gas flow passage and a valve port being provided in the gas flow passage, the bellows assembly mounting hole being provided in the bellows assembly mounting portion, the gas flow passage being communicated with the bellows assembly mounting hole through the valve port, the valve port being coaxial with the bellows assembly mounting hole and arranged at a second included angle with the axis of the gas flow passage, and two gas pipes being connected to the gas flow passage at both ends thereof respectively; a lower valve stem coaxially arranged in the bellows assembly mounting hole, the upper end of the lower valve stem extending out of the bellows assembly mounting hole from the opening of the end of the bellows assembly mounting hole away from the gas flow passage; a bellows assembly coaxially arranged in the bellows assembly mounting hole and sleeved on the lower valve stem, the bellows assembly having a collar at the end thereof away from the gas flow passage, the collar extending out of the bellows assembly mounting hole from the opening of the end of the bellows assembly mounting hole away from the gas flow passage; a valve cover, the lower end of the valve cover being mounted on the valve flange of the valve body at the end of the valve body away from the gas flow passage by means of fasteners, the upper end of the lower valve stem extending into the inner hole of the valve cover after extending out of the bellows assembly mounting hole from the opening of the end of the bellows assembly mounting hole away from the gas flow passage; an upper valve stem, the upper valve stem being mounted in the inner hole of the valve cover by means of threaded connection, the lower end of the upper valve stem being drivingly connected with the upper end of the lower valve stem, the upper end of the upper valve stem extending out of the upper end of the valve cover; a hand wheel covered on the upper end of the valve cover, the hand wheel being rotatable relative to the valve cover, the upper end of the upper valve stem extending into the hand wheel and being fixedly connected with the hand wheel after extending out of the upper end of the valve cover, and a hand wheel lever being mounted on the hand wheel; characterized in that a limiting step surface is arranged at the middle position of the length direction of the lower valve stem, and a guide sleeve is further arranged, the guide sleeve being sleeved on the lower valve stem and allowing the lower valve stem to axially move relative to the guide sleeve, the lower end of the guide sleeve being inserted between the bellows assembly and the lower valve stem, the upper end of the guide sleeve having a guide sleeve flange extending above the collar, the valve cover pressing the collar on the valve flange through the guide sleeve flange, the upper valve stem driving the lower valve stem to move upward when the upper valve stem is rotated and moved upward by clockwise rotating the hand wheel, the bellows of the bellows assembly being compressed by the upward moving upper valve stem, the lower valve stem being limited from further moving upward and compressing the bellows when the limiting step surface on the lower valve stem hits the lower end of the guide sleeve, thereby preventing the manual bellows valve from being excessively opened.

2. A manual bellows valve according to claim 1, wherein a visual indication ring being arranged on the upper end of the valve cover, the visual indication ring being covered by the hand wheel when the hand wheel is clockwise rotated, at this time the manual bellows valve is closed, and the visual indication ring being exposed from the hand wheel when the hand wheel is counterclockwise rotated, at this time the manual bellows valve is opened.

3. A manual bellows valve according to claim 1 or 2, characterised in that A piston part is arranged at the lower end of the lower valve stem, the piston part is in clearance fit with the hole face of the bellows assembly mounting hole, a sealing gasket is mounted on the bottom face of the piston part by fasteners, the sealing gasket seals the valve port when the manual bellows valve is closed.

4. A manual bellows valve according to claim 3, wherein A bellows receiving part is arranged at the lower end of the lower valve stem near the piston part, the lower end of the bellows is welded to the bellows receiving part.

5. A manual bellows valve according to claim 4, wherein The upper end of the bellows is welded to the lower end of the collar.

6. A manual bellows valve according to claim 5, wherein A ring of nickel gaskets is arranged on the valve body flange, a ring of grooves is arranged on the critical face of the collar and the valve body flange, the nickel gaskets are embedded in the ring of grooves.

7. A manual bellows valve according to claim 6, wherein An O-ring is arranged between the valve cover and the collar, the O-ring is sleeved on the periphery of the guide sleeve flange.

8. A manual bellows valve according to claim 7, wherein The lower end of the upper valve stem is embeddedly mounted with the upper end of the lower valve stem, and is connected by a steel ball arranged in the lower end of the upper valve stem and a disc arranged on the upper end of the lower valve stem.

9. A manual bellows valve according to claim 8, wherein, A leak detection hole is arranged on the valve cover, a leak detection hole screw and a leak detection hole gasket are mounted on the outer end of the leak detection hole to block the leak detection hole.

10. A manual bellows valve according to claim 9, wherein A sealing ring is arranged between the upper valve stem and the valve cover.

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