CN113803519A

CN113803519A - Bellows structure valve

Info

Publication number: CN113803519A
Application number: CN202111122119.2A
Authority: CN
Inventors: 童海东; 姚建均; 王茁; 严涛; 严珊珊; 李伟
Original assignee: Jiangsu Shengtai Valve Co ltd
Current assignee: Jiangsu Shengtai Valve Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2021-12-17
Anticipated expiration: 2041-09-24
Also published as: CN113803519B

Abstract

The invention discloses a bellows structure valve, comprising: the device comprises a valve body, a valve assembly, a valve rod, a wave tube assembly, a sealing assembly, a tray and a hand wheel; the valve assembly is arranged in the valve body through the valve rod, the wave tube assembly is arranged on the valve rod and communicated with the top of the valve body, the sealing assembly is arranged at the top of the wave tube assembly, the tray is arranged above the wave tube assembly, and the valve rod penetrates through the top of the tray and is connected with the hand wheel. According to the corrugated pipe structure valve, through the design of the structure, the wave tube component can keep the movement of the valve rod and can also keep the sealing between the valve rod and the valve body when the valve rod moves, so that liquid leakage is prevented, the sealing component can seal the joint of the valve rod and the wave tube component, and the secondary leakage of the leaked liquid from the joint of the valve rod and the wave tube component is avoided under the condition that the movement of the valve rod is not influenced.

Description

Bellows structure valve

Technical Field

The invention relates to the technical field of valves, in particular to a valve with a corrugated pipe structure.

Background

At present, people have higher and higher sealing requirements on valves, particularly special occasions such as nuclear devices, petroleum and chemical engineering and the like, and the valves are required to realize zero leakage, but all the valves at present have one durability and need to be replaced regularly so as to realize zero leakage, and even if the valves are replaced frequently, the situation that the sealing between the valve rod and the valve body is incomplete is inevitable, so that liquid media are leaked from the connection part of the valve rod and the valve. Therefore, there is a need for a bellows valve that at least partially solves the problems of the prior art.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above problems, the present invention provides a bellows structure valve comprising: the device comprises a valve body, a valve assembly, a valve rod, a wave tube assembly, a sealing assembly, a tray and a hand wheel; the valve assembly is arranged in the valve body through the valve rod, the wave tube assembly is arranged on the valve rod and communicated with the top of the valve body, the sealing assembly is arranged at the top of the wave tube assembly, the tray is arranged above the wave tube assembly, and the valve rod penetrates through the top of the tray and is connected with the hand wheel.

Preferably, the valve body comprises a water inlet, a water outlet and a valve opening, and the wave tube assembly is communicated with the valve opening. A partition plate is arranged between the water inlet and the water outlet, a first through hole is formed in the partition plate, and the valve assembly is movably connected with the first through hole.

Preferably, the valve assembly comprises a thrust pad, a valve flap and a flap cover; the valve clack is arranged on the side wall of the bottom of the valve rod, the thrust pad is arranged at the bottom of the valve clack, the valve clack cover is arranged on the side wall of the valve rod, and the valve clack is connected with the valve rod through the valve clack cover.

Preferably, the wave tube assembly comprises a valve cover, an upper disc, a corrugated tube and a lower disc; the valve comprises a valve cover, a lower disc, an upper disc, a valve rod and a sealing assembly, wherein the valve cover is provided with a first through hole, the upper disc is connected with the lower disc through a corrugated pipe, the upper disc, the corrugated pipe and the lower disc are arranged in the first through hole, the upper disc is connected with the first through hole, the outer wall of the lower disc is connected with the inner wall of the first through hole in a sliding mode, the valve rod penetrates through the lower disc, the corrugated pipe and the upper disc, the lower disc is connected with the valve rod, and the sealing assembly is arranged at the top of the upper disc.

Preferably, the bottom surface of the upper disc is welded to the top surface of the valve cover, and the bottom surface of the lower disc is welded to the valve rod.

Preferably, a filling groove is formed in the top surface of the upper disc, the valve rod penetrates through the bottom surface of the filling groove, and the sealing assembly comprises a filler, a filler pressing sleeve and a filler pressing plate; the packing groove is internally provided with the packing, the packing pressing sleeve is arranged on the outer side wall of the valve rod and inserted into the packing groove, the packing pressing plate is arranged at the top of the packing pressing sleeve, the valve rod penetrates through the packing pressing plate, and the packing pressing plate is connected with the top of the valve cover through a bolt.

Preferably, the tray is connected with the top of the valve cover through an upright column, the valve rod penetrates through the tray and is connected with the hand wheel, and the hand wheel is connected with the tray shaft.

Preferably, an oil cup is arranged on the tray and communicated with the connecting part of the tray and the hand wheel.

Preferably, a trapezoidal step with a small upper part and a large lower part is arranged in the second through hole, the trapezoidal step is positioned below the upper disc, a safety ring is arranged on the outer side wall of the bottom of the corrugated pipe, a safety sleeve is arranged between the corrugated pipe and the second through hole, the safety sleeve is positioned below the upper disc, and the safety ring is detachably connected with the safety sleeve;

the safety ring comprises a plurality of supporting sections, a plurality of inserting sections and a plurality of lock catches; the inserting sections and the supporting sections are alternately arranged, and the lock catch is arranged on the outer side wall of the inserting section;

the condom comprises a plurality of ring plates, the number of the ring plates is adapted to the insertion section, the bottom surfaces of the ring plates are provided with insertion grooves and lock holes, the insertion sections are inserted into the insertion grooves, the insertion sections are connected with the bottoms of the ring plates through the lock catches and the lock holes, the ring plates are tapered plates, and clamping platforms are arranged on the outer side walls of the tops of the ring plates.

Preferably, the water inlet and the water outlet are both provided with a water hammer assembly, and the water hammer assembly comprises a pipe body, a support ring, an impact ring, a deformation ring and an adjusting knob; the adjusting knob is arranged at the top of the pipe body and penetrates through the pipe body to be connected with the top of the support ring, a buffer groove is formed in one side of the support ring, the outer wall of the impact ring is connected with the inner wall of the buffer groove, the deformation ring is arranged on the side wall of the impact ring and located in the buffer groove, and a compression cavity is formed between the impact ring and the deformation ring;

an air passage, a buffer cavity and a buffer cushion are arranged inside the support ring; the cushion chamber is located the edge of support ring, the blotter sets up the cushion chamber, the lateral wall of support ring is provided with a plurality of spring slot, spring slot is located the buffering recess, the lateral wall of ring warp is provided with a plurality of intubate, the intubate with spring slot pegs graft, the compression chamber pass through intubate, spring slot and air flue with the cushion chamber intercommunication.

Compared with the prior art, the invention at least comprises the following beneficial effects:

1. according to the corrugated pipe structure valve, through the design of the structure, the wave tube component can keep the movement of the valve rod and can also keep the sealing between the valve rod and the valve body when the valve rod moves, so that liquid leakage is prevented, the sealing component can seal the joint of the valve rod and the wave tube component, and the secondary leakage of the leaked liquid from the joint of the valve rod and the wave tube component is avoided under the condition that the movement of the valve rod is not influenced.

Other advantages, objects, and features of the bellows construction valve of the present invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a sectional view of a bellows structure valve according to the present invention.

Fig. 2 is a schematic structural diagram of a bellows in the bellows valve according to the present invention.

Fig. 3 is a sectional view of the lower disk of the bellows valve according to the present invention.

Fig. 4 is a schematic structural diagram of a safety ring in a valve with a bellows structure according to the present invention.

Fig. 5 is a top view of a safety ring in a valve with a bellows structure according to the present invention.

Fig. 6 is a partial cross-sectional view of a condom in a bellows-structured valve according to the present invention.

Fig. 7 is a schematic structural diagram of the plug-in connection of the safety ring and the safety sleeve in the valve with the bellows structure according to the present invention.

Fig. 8 is a partial perspective view of fig. 7.

Fig. 9 is a schematic structural diagram of a water hammer assembly in a valve with a bellows structure according to the present invention.

Fig. 10 is a sectional view of a water hammer assembly in a bellows structure valve according to the present invention.

Fig. 11 is a cross-sectional view taken at a in fig. 10.

Fig. 12 is a sectional view at B in fig. 10.

Fig. 13 is a sectional view of the valve with a bellows structure according to the present invention at a buffer chamber.

In the figure: 1 valve body, 2 valve stems, 3 trays, 4 handwheels, 5 clapboards, 6 thrust pads, 7 valve clacks, 8-clack covers, 9 valve covers, 10 upper discs, 11 corrugated pipes, 12 lower discs, 13 fillers, 14 packing press sleeves, 15 packing press plates, 16 stand columns, 17 oil cups, 18 safety rings, 181 supporting sections, 182 inserting sections, 183 latches, 19 safety sleeves, 191 ring plates, 192 inserting grooves, 193 lock holes, 194 clamping tables, 20 water hammer assemblies, 201 tubes, 202 supporting rings, 203 impact rings, 204 deforming rings, 205 adjusting knobs, 206 compression chambers, 207 air passages, 208 buffer chambers, 209 buffer cushions, 210 spring inserting grooves and 211 inserting tubes.

Detailed Description

The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 to 13, the present invention provides a bellows structure valve, including: the device comprises a valve body 1, a valve assembly, a valve rod 2, a wave tube assembly, a sealing assembly, a tray 3 and a hand wheel 4; the valve component is arranged in the valve body 1 through the valve rod 2, the wave tube component is arranged on the valve rod 2 and communicated with the top of the valve body 1, the sealing component is arranged at the top of the wave tube component, the tray 3 is arranged above the wave tube component, and the valve rod 2 penetrates through the top of the tray 3 and is connected with the hand wheel 4.

The working principle of the technical scheme is as follows: when the valve need be opened, hand wheel 4 on the rotation tray 3 alright shift up with driving valve rod 2, the in-process that valve rod 2 shifted up can drive bellows subassembly and valve member above that and move, thereby make the valve open, leak when valve rod 2 and the valve body 1 between take place, thereby liquid can be blockked by the bellows subassembly on the valve rod 2 and prevent that liquid from taking place to leak from the junction of valve rod 2 and valve body 1, seal assembly can seal bellows subassembly and valve rod 2, thereby prevent that the liquid of leaking from the junction secondary leakage of valve rod 2 and bellows subassembly.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, the sealing that can not only can also keep between valve rod 2 and the valve body 1 can not influence its removal to the wave tube subassembly when valve rod 2 takes place to remove to prevent that liquid from taking place to leak, sealing assembly can seal the junction of valve rod 2 and wave tube subassembly, avoids the liquid of leaking to take place the secondary leakage from the junction of valve rod 2 and wave tube subassembly under the circumstances that does not influence the valve rod 2 removal.

In one embodiment, the valve body 1 includes a water inlet, a water outlet, and a valve port, and the wave tube assembly is in communication with the valve port. A partition plate 5 is arranged between the water inlet and the water outlet, a first through hole is formed in the partition plate 5, and the valve assembly is movably connected with the first through hole.

The working principle and the beneficial effects of the technical scheme are as follows: through the design of above-mentioned structure, valve body 1 separates water inlet and delivery port through baffle 5 to can realize the water route intercommunication between water inlet and the delivery port and close through the cooperation of first through-hole and valve member, valve mouth and delivery port setting are in the homonymy of baffle 5, thereby make and to have liquid to last to exert pressure to the wave tube subassembly and the valve rod 2 of valve mouth department after the valve member blocks up first through-hole again, thereby increased the life of valve rod 2 and wave tube subassembly.

In one embodiment, the valve assembly comprises a thrust pad 6, a valve flap 7, and a flap cover 8; the valve clack 7 is arranged on the side wall of the bottom of the valve rod 2, the thrust pad 6 is arranged at the bottom of the valve clack 7, the valve clack cover 8 is arranged on the side wall of the valve rod 2, and the valve clack 7 is connected with the valve rod 2 through the valve clack cover 8.

The working principle and the beneficial effects of the technical scheme are as follows: through the design of above-mentioned structure, valve clack 7 and thrust pad 6 cooperate jointly to die first through-hole, and the diameter of valve clack 7 is greater than the diameter of first through-hole, and the diameter of thrust pad 6 is not more than the diameter of valve clack 7 to can impress thrust pad 6 into first through-hole when valve rod 2 moves down, cooperate valve clack 7 to realize simultaneously sealed to first through-hole, and then realize closing of valve, lamella lid 8 can provide the support to the installation of valve clack 7 and prevent that it from droing.

In one embodiment, the wave tube assembly comprises a valve cap 9, an upper disc 10, a bellows 11, and a lower disc 12; the valve cap 9 is internally provided with a second through hole, the upper disc 10 is connected with the lower disc 12 through a corrugated pipe 11, the upper disc 10, the corrugated pipe 11 and the lower disc 12 are all arranged in the second through hole, the upper disc 10 is connected with the second through hole, the outer wall of the lower disc 12 is in sliding connection with the inner wall of the second through hole, the valve rod 2 penetrates through the lower disc 12, the corrugated pipe 11 and the upper disc 10, the lower disc 12 is connected with the valve rod 2, the sealing assembly is arranged at the top of the upper disc 10, the bottom surface of the upper disc 10 is welded with the top surface of the valve cap 9, and the bottom surface of the lower disc 12 is welded with the valve rod 2.

The working principle of the technical scheme is as follows: the upper disc 10, the bellows 11 and the lower disc 12 are integrally formed and disposed in the second through hole, the lower disc 12 is coupled and sealed with the stem 2 to prevent liquid from leaking from the junction of the lower disc 12 and the stem 2, the upper disc 10 is coupled with the top of the bonnet 9 to prevent liquid from leaking from the junction of the upper disc 10 and the bonnet 9, the bottom of the bonnet 9 is sealingly coupled with the valve port, thereby preventing liquid from leaking from the junction of the bonnet 9 and the valve port, and in order to prevent the leaked liquid from secondarily leaking from the junction of the stem 2 and the upper disk 10, the upper disk 10 is provided at the top thereof with a sealing assembly, the sealing can be kept under the condition that the movement of the valve rod 2 is not influenced, when the valve rod 2 is opened or closed, the valve rod 2 can drive the lower disc 12 to slide up and down in the second through hole, and once liquid permeates from the joint of the lower disc 12 and the second through hole, the liquid can be blocked by the sealed corrugated pipe 11 so as to prevent the liquid from leaking.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, valve gap 9 and valve opening, hanging wall 10 and valve gap 9, lower wall 12 and valve rod 2, hanging wall 10 and bellows 11, bellows 11 and lower wall 12 all have carried out sealing treatment thereby guarantee that the valve can not appear liquid leakage at the in-process that uses, in order to guarantee normal rotation and the displacement of valve rod 2, need realize sealed through seal assembly between valve rod 2 and the hanging wall 10, thereby avoid the tensile damage of the long-term high frequency of bellows 11 to lead to the condition appearance of liquid from the junction secondary leakage of valve rod 2 and hanging wall 10.

In one embodiment, the top surface of the upper disc 10 is provided with a filling groove, the valve rod 2 penetrates through the bottom surface of the filling groove, and the sealing assembly comprises a filler 13, a filler pressing sleeve 14 and a filler pressing plate 15; the packing device is characterized in that the packing 13 is arranged in the packing groove, the packing pressing sleeve 14 is arranged on the outer side wall of the valve rod 2 and inserted into the packing groove, the packing pressing plate 15 is arranged at the top of the packing pressing sleeve 14, the valve rod 2 penetrates through the packing pressing plate 15, the packing pressing plate 15 is connected with the top of the valve cover 9 through a bolt, the tray 3 is connected with the top of the valve cover 9 through an upright post 16, the valve rod 2 penetrates through the tray 3 and is connected with the hand wheel 4, the hand wheel 4 is connected with the tray 3 through a shaft, the tray 3 is provided with an oil cup 17, and the oil cup 17 is communicated with the connection part of the tray 3 and the hand wheel 4.

The working principle of the technical scheme is as follows: when sealing between the upper disc 10 and the valve rod 2, the filling groove needs to be filled with filler 13, the filler 13 can be made of wear-resistant materials, then the filling pressing sleeve 14 is pressed into the filling groove through the filling pressing plate 15, the filler 13 in the filling groove is compacted to ensure the sealing effect, the relative distance between the filling pressing plate 15 and a bolt at the top of the valve cover 9 can be adjusted through the filling pressing plate 15, the compaction force of the filling pressing sleeve 14 on the filler 13 is further adjusted, the tray 3 is limited in position through the upright post 16 to further support the installation of the hand wheel 4, the hand wheel 4 is connected with the tray 3 through a shaft, the hand wheel 4 can drive the valve rod 2 to move when rotating, so that the valve is controlled to be opened and closed, and the side wall of the tray 3 is further provided with an oil cup 17 for filling oil into the hand wheel 4.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, filler 13 in the filling tank can carry out periodic replacement as required and avoid filler 13 live time to appear sealed untight and phenomenon such as filler 13 ageing for a long time, the degree of compaction of filler 13 can be adjusted to the cooperation between packing pressure sleeve 14 and the pressure plate 15, and through the resistance size when degree of compaction adjustment valve rod 2 moves for filler 13, and then the rotation dynamics of adjustment hand wheel 4, tray 3 can provide the support for hand wheel 4's installation and can also prevent that the axle connecting part from drying and puckering to hand wheel 4 and tray 3's junction oiling through oil cup 17 on it simultaneously.

In one embodiment, a trapezoidal step with a small upper part and a large lower part is arranged in the second through hole, the trapezoidal step is positioned below the upper disc 10, a safety ring 18 is arranged on the outer side wall of the bottom of the corrugated tube 11, a safety sleeve 19 is arranged between the corrugated tube 11 and the second through hole, the safety sleeve 19 is positioned below the upper disc 10, and the safety ring 18 and the safety sleeve 19 are detachably connected;

the safety ring 18 comprises a plurality of supporting sections 181, a plurality of inserting sections 182 and a plurality of locking buckles 183; the insertion sections 182 and the support sections 181 are alternately arranged, and the latches 183 are arranged on the outer side walls of the insertion sections 182;

the condom 19 comprises a plurality of ring plates 191, the number of the ring plates 191 is matched with that of the insertion sections 182, the bottom surfaces of the ring plates 191 are provided with insertion grooves 192 and lock holes 193, the insertion sections 182 are inserted into the insertion grooves 192, the insertion sections 182 are connected with the bottoms of the ring plates 191 through the matching of the lock catches 183 and the lock holes 193, the ring plates 191 are tapered plates, and the outer side walls of the tops of the ring plates 191 are provided with clamping platforms 194.

The working principle of the technical scheme is as follows: when the valve rod 2 is suddenly damaged and is pushed to rapidly rise by liquid in the valve, the corrugated pipe 11 can be rapidly compressed, at the moment, the safety ring 18 at the bottommost end of the corrugated pipe 11 also rapidly rises, the insertion section 182 on the safety pipe 18 is rapidly inserted into the insertion groove 192, the lock catch 183 is inserted into the lock hole 193 to achieve rapid connection of the safety ring 18 and the safety sleeve 19, the valve rod 2 can continuously move upwards under the action of the liquid pressure in the valve, at the moment, the corrugated pipe 11 wrapped by the ring plate 191 is extruded and deformed, the safety sleeve 19 is driven to move upwards, the ring plate 191 is a tapered plate, when the safety ring 18 and the safety sleeve 19 are inserted, a round table shape with a small upper part and a small lower part is formed, the support section 181 bent under the extrusion of the corrugated pipe 11 is propped open, and the clamping table 194 of the ring plate 191 can be clamped by the trapezoidal step in the second through hole, so that the stacks are squeezed together, The deformed bellows 11 will block the lower disc 12 from further moving upwards and act as a buffer and seal, thus achieving the safety effect of the valve.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, safety ring 18 and condom 19 can realize the high-speed joint after valve rod 2 damages, pile up bellows 11 together and can move up until calorie platform 194 is blocked by trapezoidal step along with condom 19, bellows 11 is expanded safety ring 18 by extrusion deformation afterwards, thereby strut the bottom of condom 19, the round platform shape, by extruded bellows 11 can carry out the shock attenuation and the effect of buffering to lower wall 12 that rises fast and strike on it, avoid under the striking of lower wall 12, upper wall 10 and valve gap 9 separation cause bigger accident of revealing, the bellows 11 that piles up simultaneously can seal between valve rod 2 and the upper wall 10 thereby prevent liquid leakage.

In one embodiment, the water inlet and the water outlet are provided with a water hammer assembly 20, and the water hammer assembly 20 comprises a pipe body 201, a support ring 202, an impact ring 203, a deformation ring 204 and an adjusting knob 205; the adjusting knob 205 is arranged on the top of the pipe body 201 and the adjusting knob 205 penetrates through the pipe body 201 to be connected with the top of the support ring 202, a buffer groove is arranged on one side of the support ring 202, the outer wall of the impact ring 203 is connected with the inner wall of the buffer groove, the deformation ring 204 is arranged on the side wall of the impact ring 203 and is positioned in the buffer groove, and a compression cavity 206 is formed between the impact ring 203 and the deformation ring 204;

an air channel 207, a buffer cavity 208 and a buffer cushion 209 are arranged inside the supporting ring 202; the buffer cavity 208 is located at the edge of the support ring 202, the buffer pad 209 is arranged in the buffer cavity 208, the side wall of the support ring 202 is provided with a plurality of spring slots 210, the spring slots 210 are located in the buffer grooves, the side wall of the deformation ring 204 is provided with a plurality of insertion tubes 211, the insertion tubes 211 are inserted into the spring slots 210, and the compression cavity 206 is communicated with the buffer cavity 208 through the insertion tubes 211, the spring slots 210 and the air passages 207.

The working principle of the technical scheme is as follows: when the water hammer assembly 20 is installed, the pipe body 201 is respectively installed at the water inlet and the water outlet, after the installation, the direction of the impact ring 203 can be adjusted through the adjusting knob 205, the impact ring 203 is adjusted to the impact direction of the water hammer, the impact ring 203 can be deformed when the water hammer impacts the impact ring 203, and then the impact ring extrudes air in the compression cavity 206, the compression cavity 206 can drive the deformation ring 204 under the action of air pressure to indicate that the deformation occurs, so that the insertion pipe 211 extrudes a spring in the spring insertion slot 210, meanwhile, the air can enter the air passage 207 from the insertion pipe 211, the air reaches the buffer cavity 208 through the air passage 207 and extrudes a hollow buffer cushion 209 in the buffer cavity, so that the impact force on the water hammer is transferred, the impact on the valve is reduced after the water hammer passes through the discharge force of the water hammer assembly 20, so that the service life of the valve is prolonged, and after the water hammer impacts, the hollow cushion 209 can be restored, and simultaneously pushes the gas in the buffer chamber 208 back into the compression chamber 206 via the gas passage 207 and returns the deformation ring 204 in cooperation with the force of the spring in the spring insertion groove 210, and simultaneously returns the impact ring 203.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, water hammer subassembly 20 can change the effort of water hammer and consume to reduce the striking of water hammer to the valve, and then increase the life of valve, adjust knob 205 can make the installation of water hammer subassembly 20 unrestricted, carries out the direction adjustment to impact ring 203 again after the installation is accomplished, thereby the condition that the direction dress was turned over and is leaded to the water hammer to relapse striking appears between water hammer subassembly 20 and valve when avoiding the installation.

In one embodiment, in order to seal the valve rod 2 by the filler 13 when the packing sleeve 14 presses the filler 13, the lowest compression height H of the filler 13 needs to be calculated by the following formula

H＝10(C+KP)²/Q²

Wherein H is the minimum contact height of the packing 13 with the valve stem 2 after compression; c is the material coefficient of the valve stem 2, typically steel and cemented carbide C is 3.5, and rubber C is 0.4; k is the coefficient of influence of the medium pressure on the pressure value of the material of the valve rod 2, typically steel and cemented carbide K is 1 and rubber K is 0.6; p is the pressure of the filler 13 against the valve stem 2; q is a specific seal pressure value of the filler 3 in a liquid normal temperature state.

The working principle and the beneficial effects of the technical scheme are as follows: the minimum contact height of the compressed filler 13 and the valve rod 2 is calculated through the formula, the sealing performance between the filler 13 and the valve rod 2 can be ensured as long as the height is ensured to be greater than H, so that the secondary leakage of liquid is avoided, and if the height of the filler 13 is less than H, the secondary leakage can be caused by seepage from a gap between the filler 13 and the valve rod 2 under the action of liquid pressure.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A bellows construction valve, comprising: the valve comprises a valve body (1), a valve component, a valve rod (2), a wave tube component, a sealing component, a tray (3) and a hand wheel (4); the valve assembly is arranged in the valve body (1) through the valve rod (2), the wave tube assembly is arranged on the valve rod (2) and communicated with the top of the valve body (1), the sealing assembly is arranged at the top of the wave tube assembly, the tray (3) is arranged above the wave tube assembly, and the valve rod (2) penetrates through the top of the tray (3) and is connected with the hand wheel (4).

2. Bellows construction valve according to claim 1, wherein the valve body (1) comprises a water inlet, a water outlet and a valve opening, the wave tube assembly being in communication with the valve opening. A partition plate (5) is arranged between the water inlet and the water outlet, a first through hole is formed in the partition plate (5), and the valve assembly is movably connected with the first through hole.

3. Bellows structure valve according to claim 1, wherein the valve assembly comprises a thrust pad (6), a flap (7) and a flap cover (8); the valve clack (7) is arranged on the side wall of the bottom of the valve rod (2), the thrust pad (6) is arranged at the bottom of the valve clack (7), the valve clack cover (8) is arranged on the side wall of the valve rod (2), and the valve clack (7) is connected with the valve rod (2) through the valve clack cover (8).

4. Bellows structure valve according to claim 1, wherein the wave tube assembly comprises a valve cap (9), an upper disc (10), a bellows (11) and a lower disc (12); the improved valve is characterized in that a second through hole is formed in the valve cover (9), the upper disc (10) is connected with the lower disc (12) through a corrugated pipe (11), the upper disc (10), the corrugated pipe (11) and the lower disc (12) are arranged in the second through hole, the upper disc (10) is connected with the second through hole, the outer wall of the lower disc (12) is connected with the inner wall of the second through hole in a sliding mode, the valve rod (2) penetrates through the lower disc (12), the corrugated pipe (11) and the upper disc (10), the lower disc (12) is connected with the valve rod (2), and the sealing assembly is arranged at the top of the upper disc (10).

5. Bellows structure valve according to claim 4, wherein the bottom surface of the upper disc (10) is welded to the top surface of the bonnet (9) and the bottom surface of the lower disc (12) is welded to the stem (2).

6. The bellows structure valve according to claim 4, wherein a top surface of the upper disc (10) is provided with a packing groove, the stem (2) penetrates through a bottom surface of the packing groove, and the sealing assembly includes a packing (13), a packing gland (14), and a packing presser plate (15); the packing structure is characterized in that the packing (13) is arranged in the packing groove, the packing pressing sleeve (14) is arranged on the outer side wall of the valve rod (2) and inserted into the packing groove, the packing pressing plate (15) is arranged at the top of the packing pressing sleeve (14), the valve rod (2) penetrates through the packing pressing plate (15), and the packing pressing plate (15) is connected with the top of the valve cover (9) through a bolt.

7. Bellows construction valve according to claim 4, wherein the tray (3) is connected to the top of the valve cap (9) by means of a post (16), the valve stem (2) is connected to the handwheel (4) through the tray (3), and the handwheel (4) is connected to the tray (3) shaft.

8. Bellows structure valve according to claim 7, characterized in that an oil cup (17) is arranged on the tray (3), said oil cup (17) communicating with the connection of the tray (3) and the hand wheel (4).

9. The bellows structure valve according to claim 4, wherein a trapezoid step with a small top and a large bottom is arranged in the second through hole, the trapezoid step is located below the upper disc (10), a safety ring (18) is arranged on the outer side wall of the bottom of the bellows (11), a safety sleeve (19) is arranged between the bellows (11) and the second through hole, the safety sleeve (19) is located below the upper disc (10), and the safety ring (18) and the safety sleeve (19) are detachably connected;

the safety ring (18) comprises a plurality of supporting sections (181), a plurality of inserting sections (182) and a plurality of lock catches (183); the insertion sections (182) and the support sections (181) are alternately arranged, and the latches (183) are arranged on the outer side wall of the insertion section (182);

condom (19) includes a plurality of crown plate (191), the quantity of crown plate (191) with insert section (182) and suit, the bottom surface of crown plate (191) is provided with insertion groove (192) and keyhole (193), insert section (182) with insertion groove (192) are pegged graft, insert section (182) through hasp (183) with the cooperation of keyhole (193) with the bottom of crown plate (191) is connected, crown plate (191) are the tapering board, be provided with card platform (194) on the lateral wall at the top of crown plate (191).

10. Bellows structure valve according to claim 2, wherein the water inlet and the water outlet are each provided with a water hammer assembly (20), the water hammer assembly (20) comprising a tube (201), a support ring (202), an impact ring (203), a deformation ring (204) and an adjustment knob (205); the adjusting knob (205) is arranged on the top of the pipe body (201) and the adjusting knob (205) penetrates through the pipe body (201) and is connected with the top of the support ring (202), one side of the support ring (202) is provided with a buffer groove, the outer wall of the impact ring (203) is connected with the inner wall of the buffer groove, the deformation ring (204) is arranged on the side wall of the impact ring (203) and is positioned in the buffer groove, and a compression cavity (206) is formed between the impact ring (203) and the deformation ring (204);

an air channel (207), a buffer cavity (208) and a buffer pad (209) are arranged in the support ring (202); cushion chamber (208) are located the edge of support ring (202), blotter (209) set up in cushion chamber (208), the lateral wall of support ring (202) is provided with a plurality of spring slot (210), spring slot (210) are located in the buffering recess, the lateral wall of deformation ring (204) is provided with a plurality of intubate (211), intubate (211) with spring slot (210) are pegged graft, compression chamber (206) through intubate (211), spring slot (210) and air flue (207) with cushion chamber (208) intercommunication.